Monday, August 1, 2011

Biomedical Engineer Rated As Best Career in 2011 by U.S. News & World Report

Recession is officially over, but where, exactly, are the jobs? Which occupations offer decent salaries, quality of life—and are likely to stick around for the next decade? Have you thought about this ? You can kill some time on web for it. Well, for the record, Biomedical Engineers top the list of best careers. This article apprises the future of Biomedical Engineers in coming years.
According to U.S. News & World Report in 50 Best Careers , Biomedical Engineers top the technology and science category this year.

Why a massive growth in Biomedical Engineering sector ?

Yups ! there is an enormous demand for better medical devices and equipment designed by biomedical engineers, due to aging of population and burgeoning health issues. The crux of the continuous demand of Biomedical engineers include need for highly advanced medical equipments, procedures, compatibility, reduced costs, easy servicing and maintenance in hospitals and clinics. This list actually doesn’t stop, a 21 per cent growth is projected for biomedical engineers, with an estimated 3,000 new careers created in the industry through 2016.

The Rundown:


  • Kudos to advancement in medical processes, devices, and equipment. Have you imagined medical care without asthma inhalers, artificial hearts, MRIs, or prosthetic limbs? Biomedical engineers have helped to develop the equipment & devices that improve or enable the preservation of health.


  • They apply their knowledge of engineering—particularly mechanical or electronic—to areas such as imaging, drug delivery, or biomaterials.Some biomedical engineers might spend their time working on devices & procedures related to rehabilitation or to orthopedics.

  • The Outlook:


  • No single occupation is expected to have more job growth over the next decade or so.

  • Employment of biomedical engineers is expected to grow by a whopping 72% —adding nearly 12,000 jobs—between 2008 and 2018, according to the Labor Department.

  • Money:


  • Median annual wages for biomedical engineers were $78,860 in 2009, the Labor Department reports.

  • The highest-paid 10 percent make more than $123,000, while the lowest-paid 10 percent make less than $50,000.

  • Upward Mobility:


  • Biomedical engineers may advance to more complex research and development projects.

  • They may later move up to supervisory positions.

  • Activity Level:


  • Average. You may not be constantly moving, but it’s not a standard desk job.

  • Stress Level:


  • Average. You’ll face deadlines and pressure, but much of your work is self-directed, and schedules tend to be pretty routine.

  • Education & Preparation:


  • Some biomedical engineers have undergraduate degrees in mechanical or electronics engineering, while newer students may pursue biomedical degrees even at the undergraduate level.

  • For research and development work, you’ll generally need a graduate degree.

  • Real advice from real people about landing a job as a biomedical engineer:

    “Since this is such a new field, it’s constantly being redefined. Some graduates will head into traditional fields like pharmaceuticals, but he’s seeing an increasing number move into fields such as strategic consulting, law, and even finance. Don’t limit yourself when pursuing jobs in this field. Find out your real passion first, there’s so biomedical engineers can do.” says Philip Leduc, associate professor at Carnegie Mellon University and member of the Biomedical Engineering Society board of directors.
    Hope, you have enjoyed this article. If you are a biomedical engineering student or a professional, please spread this good news among your peers. Also share your views and suggestions in the comments section below.

    Biomedical Research Needs a Paradigm Shift

    Without a major shift in how the medical establishment defines the nature of reality and its relation to human physiology, we are nearing the limit of what we can accomplish in biomedical research and its treatment of disease. The best example of this is cancer. In 1984, the National Cancer Institute (NCI) launched a program it claimed would halve the 1980 cancer mortality rate by the year 2000. Despite the fact that the NCI budget increased twentyfold between 1971 and 2003 (to about $4.6 billion), progress with cancer mortality rates during that period was modest. A review of the rates between 1980 and 2000 reveals that incidence rates in women for all cancers combined actually increased.1 For men there was more fluctuation: first an increase, then a decrease, then a stabilization.2 The overall net result, however, is that between 1990 and 2000 cancer mortality rates decreased in numbers ranging only from .08 percent a year to 1.8 percent a year.3 Given the major public health impact of cancer and the huge expenditures of research dollars, this disappointing result should raise some serious questions.
    I believe the problem lies in two fundamental principles currently dominating biomedical research, both of which are based on outdated assumptions. The first is reductionism, the belief that complex diseases can be understood by dissecting them into their individual subcomponents (for example, genes, receptors, transcription factors, and signaling pathways). The second is materialism, the belief that matter is the primary cause of all physiological functioning, diseases, cognitions, and thought processes.
    Reductionism – The Parts Are Greater Than the Whole
    The greatest problem with reductionism is that it ignores the concept of emergent properties, the characteristics that emerge from the synergistic interactions of multiple units (such as genes and cells) that are not present in the individual components. An illustration of an emergent property is temperature.4 The temperature of a liquid, solid, or gas is defined as the average velocity (rapidity of motion) of all the atoms or molecules of the substance being measured. Knowing the velocity of a single atom, for example, gives no information about the temperature of the total substance, because increasing the velocity of one or even several atoms may not cause any temperature change since other atoms may simultaneously decrease in velocity. In fact, this is the case when temperature remains constant. The emergent characteristics of the collective particles (temperature resulting from movement) cannot be predicted or understood even by knowing everything there is to know about, for example, water’s individual atoms of hydrogen and oxygen.
    In human physiology, organ systems are examples of emergent properties. Knowing everything there is to know about a cell in the heart (for example, a muscle cell) does not provide enough information to predict the function of the heart, nor does knowing the sequence of DNA base pairs that make up a single amino acid provide enough information to predict the characteristics of a transcription protein composed of many amino acids. In other words, the whole is more than the sum of its parts. The same principle applies to complex diseases, which evolve from the interaction of multiple genes and environmental factors occurring at single points in time and in other ways during the progression of the disease. What is more, we know that gene function varies and that one gene can have multiple functions based on environmental triggers that turn it “off” or “on” and regulate the extent of its activity. One of the consequences of these complex interactions is that gene expression varies greatly based on the cellular environment.5 If the gene isn’t consistently functioning the same way, it will not always be associated with the same phenotype or disease outcome, even if its function is important for that particular disease. This is one of the reasons that genome-wide association studies that investigate single genes are so difficult to replicate.
    Thus, while investigating individual genes or signaling pathways is important, it doesn’t provide a complete picture of disease causality unless used in conjunction with research on multiple interacting systems – with cancer, this would mean those that fight against cancer by killing or repairing mutated cells. When experiments on single pathways are interpreted alone, they can lead to inaccurate conclusions. The analogy of blind men experiencing an elephant for the first time is appropriate here. The man feeling the tail says that elephants are like snakes, skinny and flexible. The man feeling the leg says that elephants are big and round like trees. The man feeling the tusk says that both of these descriptions are wrong because elephants are hard, smooth, and curved. Needless to say, all are partially correct, but none is even close to describing the essence of the elephant. Similarly, a detailed description of the well-known breast cancer genes BRCA1 and BRCA2 does not provide nearly enough information to understand the etiology (cause) and progression of breast cancer. Many women who have these genes don’t get cancer, and many women who get breast cancer don’t have these genes.
    Our beliefs about etiology are important because they influence how we design experiments and which variables we choose to investigate. If we believe that cancer can be reduced to a single gene mutation or signaling pathway, for example, the study design will reflect that, and we may ignore relevant factors that don’t fit this concept. A receptor in a chemical preparation outside the body will react differently to a stimulus than the same receptor in its natural environment in a living system, because the receptor outside the body is in an unchanging chemical environment. Genes and receptors in living systems are constrained or stimulated by a surrounding environment (for example, transmitter substances, immune parameters, hormones, etc.) that changes dynamically to meet the body’s needs. Genes can be functionally turned off and on by ambient factors that are influenced by our environment, such as nutrients, stress hormones, toxicants, and so on. In addition, many genes have multiple functions that adapt to meet the demands of the surrounding environment. Most animal models used in cancer research are genetically modified because it is difficult to get a tumor to grow in an “intact” animal. The reason is that the body’s natural defenses against tumor growth (such as DNA repair, programmed cell death, and immune function) respond by destroying the tumor cells. So the way that a study is designed plays a key role in determining the results as well as their generalizability to real-life situations.
    Fortunately, a number of medical scientists have begun to grasp this fact, and they are beginning to use approaches that have been collectively termed “systems biology” to try to investigate the simultaneous interaction of multiple complex systems. Though still in its infancy, systems biology accompanied by new mathematical approaches has great potential for improving our understanding of disease causality.
    Materialism – Matter Is Primary
    Unfortunately, the same progress has not been made with the second faulty assumption – the belief that matter is the primary cause of all physiological functioning, diseases, cognitions, and thought processes – which currently dominates and limits biomedical research. Because this assumption has not yet been recognized, no attempts have been made to resolve it. The consequence is a fundamental divergence between the ways modern physics and modern medicine define the nature of reality, which hinges upon the fact that biomedical research has not incorporated the implications of quantum theory into its hypotheses. Biomedical research still focuses solely on particulate matter, refusing to investigate or acknowledge the functional importance of the intrinsic energetic aspects of living systems. In essence, medicine is only examining one side of Einstein’s equation. Without the inclusion of both sides, we will continue to be like the blind men describing the elephant, describing bits and pieces without understanding the fundamental essence of humanness or complex diseases such as cancer.
    Einstein long ago showed us that matter and energy are interchangeable. This means that energy can be created from matter and that matter can be created from energy. We can all think of examples where matter is converted to energy, such as a fire that converts wood to heat energy. But Einstein’s equation, E=MC2, means that energy can also be converted to matter. This was verified as early as the 1950s, when it was demonstrated in a cyclotron that matter could be created from fast-spinning energy.
    Quantum theory went a step further by showing that at a subatomic level, distinctions between matter and energy blur. One of the most well-known quantum physical experiments showed that whether light consisted of particles or waves (matter or energy) depended solely on how the experiment was set up. This completely contradicted the world of Newtonian physics, which defined reality as an objective state totally independent of the observer. The problem that quantum theoretical experiments present is that at a subatomic level, the little building blocks of matter disappear so that energy and matter become two aspects of one and the same reality. This is not some abstract theory but has been experimentally verified over and over again and is the basis of many of the electronic components in use today.
    Quantum theoretical experiments have also shown that whether light appears as particles or waves depends on how the measurements are made. Despite the fervent wishes of some of the discoverers of quantum mechanics, this is not a function of measurement error but a statement about the nature of reality – it cannot be reduced to little building blocks of matter. We influence the outcome of our experiments by the way we measure, which has enormous implications for biomedical research.
    The fact that matter and energy are interchangeable at a subatomic level means it is difficult to say which of them is primary. What quantum theory leaves open is the distinct possibility that energy may actually be primary and matter secondary – that energy “congeals” (for lack of a better word) into matter at a lower vibrational level. Another interpretation is that matter and energy are always coexistent. Either way, both of these concepts contradict the fundamental assumption of biomedical research that all causality can be found in particulate matter. Materialism has been disproved but not discarded, and it is time to examine the consequences that this bias has for scientific inquiry.
    Consider the implications of common diagnostic methods. Hospitals regularly use ECGs (electrocardiograms) to assess heart function and to diagnose heart disease, as well as EEGs (electroencephalograms) to assess brain function and to diagnose diseases such as epilepsy. These instruments measure energy fields on the surface of the body, which are emanating from inside the body. But based on the belief that disease causality can only be found in matter, we assume these energies have no function – they can accurately diagnose function but are not causally related to it. This relegates them to the category of epiphenomena (secondary outcomes), although in some cases they are the most reliable measure of disease status that we have.
    This type of assumption is important because it influences what we choose to investigate and can inadvertently introduce bias. If we only investigate the elephant’s tail, we may conclude that elephants are skinny and move like a snake.  If we only investigate particulate matter, we will definitely find significant correlations, but will it help us understand causality and provide enough information for effective treatments? Physics is the essence of biochemical processes in the body because chemical bonds consist of electromagnetic or electrostatic attraction between atoms. Examples are a covalent bond, which occurs when two atoms share an electron, or the creation of an ion, when one atom takes an electron from another and creates an unbalanced charge in the electron-depleted atom. These bonds are energetic forces that are needed to create molecules, so energy is fundamental to chemistry. Since chemistry is the basis of all processes in the body, whether it is the creation of hormones, neurotransmitters, cell metabolism, or any other process, energy plays a very prominent role in function. What is not well known is how relevant energy is for genetics.
    DNA is packaged in the nucleus by being wrapped around a positively charged group of histone proteins, sort of like thread wrapped around a spool. What keeps the DNA in place is an attraction between the negatively charged DNA and the positively charged histone tails. This packaging not only helps the DNA fit inside the nucleus, it keeps the gene from being expressed until it is needed. In order to become functional, the DNA must be unwound from the spool so that factors that help to activate it can reach it. For this to happen, the electromagnetic charge between DNA and protein spool must be dissolved. In short, energetic forces are fundamental to every process in the body, starting with genes and moving to the level of organ systems. (See note #6 below to access a more detailed description of electromagnetic phenomena in biological systems.)
    Bringing Physics and Biology Together
    Despite the importance of energetic aspects to human physiology, we limit research on functional mechanisms and treatment modalities to particulate matter. This is not consistent with quantum theory and makes the primary theoretical framework of biomedicine more than ninety years out of date. As cancer statistics show, the true “essence of the elephant” is still eluding us. Cancer is currently the second leading cause of death in the United States, and it is expected to become the leading cause of death within the next decade.7 Estimated costs for cancer in 2010 totaled $263.8 billion, including $102.8 billion for direct medical costs, 20.9 billion for indirect costs of morbidity (for example, lost productivity from illness), and $140.1 billion for lost productivity due to premature death.8 Clearly, we have a long way to go in our understanding of this disease. After many years of increasing investment and diminishing returns, the question we must begin to ask ourselves is, Are we using the right paradigm? Given the experimentally verified validity of quantum mechanics, I believe it’s time to seriously consider the implications for biomedical research.
    So, what kind of research do we need? Consider the following example. Acupuncture as a treatment is more than two thousand years old and is regularly used in China to treat a multiplicity of diseases. It is based on the theory that there are energy meridians in the body and that when they are out of balance, susceptibility to disease increases. Because this paradigm does not fit Western medical concepts of disease causality, it has essentially been dismissed. The medical community has limited acupuncture’s potential usefulness to pain relief and therapy for nausea from chemotherapy. Such limited use contradicts research reported at a 1997 Consensus Development Conference on Acupuncture held at the National Institutes of Health, which covered basic studies on mechanisms of action from acupuncture treatments, including the release of opioids and other peptides in the central nervous system as well as changes in neuroendocrine function.9 Studies found acupuncture also influenced other physiological systems including substances that constrict and dilate blood vessels, those that stimulate or calm the nervous system, and those that affect reproductive and immune function.
    Close examination reveals that acupuncture needles are not inserted in places that would logically elicit these effects based on traditional anatomy. So what can explain them? It is interesting that many of the molecules in the body (water molecules, protein molecules, etc.) are dipoles. A dipole has both a positive and a negative charge, sort of like a magnet except the strength of the attraction isn’t constant. Theoretically, the structure of dipoles would allow them to align with other dipoles in “strings.” Is it possible that the acupuncture meridians are strings of dipoles held together by their electric charges? If that is the case, the structure of these meridians might be partially determined by the geometry of the body. If such meridians exist, the insertion of acupuncture needles might function to modulate their orientation by changing the vibration of atoms in nearby molecules, resulting in the propagation of an electromagnetic wave along the meridian.Since the chemical properties of atoms and molecules are determined by their electron configurations, which in turn determine the types of bonds they form with other molecules, a perturbation at a particular point in a meridian might be associated with a specific range of chemical changes (for example, neuroendocrine or immune changes).10
    The concept of longitudinal electric modes based on the dipolar properties of cell membranes was introduced by Frohlich in 196811. From a technical perspective, and according to his theory, components with electric dipole oscillations interact through nonlinear long-range Coulomb forces and thus establish a branch or branches of longitudinal electric modes in a frequency range of 1011-1012 sec-1. If the rate of energy supply to the relevant components is sufficiently large, it gets channeled into a single mode which then presents a strongly excited coherent longitudinal electric vibration whose wavelength depends on details of the geometrical arrangement of the components.
    This is only one example, and it illustrates that relevant and potentially fruitful avenues are not being pursued in biomedical research because of a dominant paradigm that is no longer valid. It is time for an open discussion in the biomedical community about the fundamental assumptions that influence its work, and quantum theorists should be part of that conversation.

    Predictive genetic testing for the identification of high-risk groups

    Background

    Genetic risk models could potentially be useful in identifying high-risk groups for the prevention of complex diseases. We investigated the performance of this risk stratification strategy by examining epidemiological parameters that impact the predictive ability of risk models.

    Methods

    We assessed sensitivity, specificity, positive and negative predictive value for all possible risk thresholds that can define high-risk groups and investigated how these measures depend on the frequency of disease in the population, the frequency of the high-risk group, and the discriminative accuracy of the risk model, as assessed by the area under the receiver-operating characteristic curve (AUC). In a simulation study, we modeled genetic risk scores of 50 genes with equal odds ratios and genotype frequencies, and varied the odds ratios and the disease frequency across scenarios. We also performed a simulation of age-related macular degeneration risk prediction based on published odds ratios and frequencies for six genetic risk variants.

    Results

    We show that when the frequency of the high-risk group was lower than the disease frequency, positive predictive value increased with the AUC but sensitivity remained low. When the frequency of the high-risk group was higher than the disease frequency, sensitivity was high but positive predictive value remained low. When both frequencies were equal, both positive predictive value and sensitivity increased with increasing AUC, but higher AUC was needed to maximize both measures.

    Conclusions

    The performance of risk stratification is strongly determined by the frequency of the high-risk group relative to the frequency of disease in the population. The identification of high-risk groups with appreciable combinations of sensitivity and positive predictive value requires higher AUC.

    Detection of lineage-specific evolutionary changes among primate species

    Background

    Comparison of the human genome with other primates offers the opportunity to detect evolutionary events that created the diverse phenotypes among the primate species. Because the primate genomes are highly similar to one another, methods developed for analysis of more divergent species do not always detect signs of evolutionary selection.

    Results

    We have developed a new method, called DivE, specifically designed to find regions that have evolved either more or less rapidly than expected, for any clade within a set of very closely related species. Unlike some previous methods, DivE does not rely on rates of synonymous and nonsynonymous substitution, which enables it to detect evolutionary events in noncoding regions. We demonstrate using simulated data that DivE compares favorably to alternative methods, and we then apply DivE to the ENCODE regions in 14 primate species. We identify thousands of regions in these primates, ranging from 50 to >10000 bp in length, that appear to have experienced either constrained or accelerated rates of evolution. In particular, we detected 4942 regions that have potentially undergone positive selection in one or more primate species. Most of these regions occur outside of protein-coding genes, although we identified 20 proteins that have experienced positive selection.

    Conclusions

    DivE provides an easy-to-use method to predict both positive and negative selection in noncoding DNA, that is particularly well-suited to detecting lineage-specific selection in large genomes.

    Background

    The genome of a living species is the product of a long series of changes, including neutral, beneficial, and detrimental alterations to the sequence. Sequence changes that affect the organism's fitness are subject to evolutionary pressures, such as the pressure to survive, to out-compete other species, and to defend the organism against external attack. In order to uncover these changes, we need to know what the ancestral genome looked like, which we can infer by comparing multiple genomes to one another. As we accumulate genomes from species related to human, and especially from within the primate lineages, we should be able to learn more about what makes humans special. At the same time, we can learn what makes each primate different from the others. Until recently, methods for detecting the effects of evolution had been designed for relatively distant species such as humans and mice. With the publication of the chimpanzee genome [1], we had our first look at a very close relative of human. The genomes of chimpanzees and humans are so close, in fact, that sequence similarity cannot be used to infer functional significance: in most cases, similarity simply reflects the recent divergence between the species. With more species, sequence comparison even among close relatives can be used to tease apart regions that are constrained by evolutionary forces and that, consequently, are likely to have functional importance to the biology of humans.
    Recently, the ENCODE project selected 13 primates (in addition to human) and sequenced 1% of each genome to produce "comparative grade" [2] assemblies. These high-quality sequences from close human relatives give us a greater ability than before to detect the signs of evolutionary selection on the human genome and other primates. The traces of evolution's effects can be found more easily when they are shared among multiple species. Signs of selection also may indicate functionally important sequences, and in particular they can be used to identify regulatory regions that fall outside protein-coding regions and are otherwise difficult to find.
    Broadly speaking, there are two main types of selective processes driving the evolution of genomes. Negative or purifying selection is the evolutionary pressure that eliminates deleterious mutations from a population. Most mutations in the genome are probably neutral, because most of the genome is itself non-functional, but within coding regions, the majority of mutations are deleterious [3]. Deleterious mutations are likely to be transient; i.e., they do not become fixed in the human population. Negative selection has been identified principally by pairwise sequence alignment methods, through which DNA or amino acid sequences can be shown to be more highly conserved than expected based on the overall evolutionary distance between a pair of species. By one well-known estimate, approximately 5% of the human genome is under negative selection [4], of which only 1.5% is contained in protein-coding exons.
    Positive selection is more difficult to detect. In positive selection, a region of the genome, protein coding or otherwise, accumulates beneficial mutations that provide a survival advantage to the organism. One way to detect positive selection is by the presence of genes that have acquired many more mutations than other genes when compared to close relatives. A well-documented example of positive selection is the rapid change in the hemagglutinin protein on the surface of the human influenza virus, which is in constant competition with the human immune system [5]. Positive selection must be carefully distinguished from the relaxation of selective constraints, however. If a sequence (a gene or a regulatory sequence) ceases to perform its function, and if that function is no longer needed by the organism, then it might accumulate mutations faster precisely because it is no longer functional.
    In this study, we describe a new method, called DivE, for detecting lineage-specific regions evolving at a slower or faster rate than the background evolutionary rate in the primate genomes. Other methods have been previously developed for detecting selection, but most look only at conservation of sequence (negative selection) in all aligned species, and are not lineage specific [6-12]. Methods to detect accelerated regions (i.e. regions evolving at faster-than-neutral rates) have also appeared recently [13-18]. Some of these methods allow for lineage-specific selection [14-16,18], but in contrast with conservation-detection methods, they cannot be easily used for genome-wide scans to detect selection, and look only at particular regions of interest. Although accelerated regions may indicate positive selection, this is not necessarily the case [19]. There are many examples where positive selection manifests itself at only a small number of sites [20-23]. Our method is not suited to the identification of positive selection in these cases.
    Recently a new program, phyloP, was developed to examine the more general problem of detecting either conserved or accelerated regions in a set of aligned orthologous sequences from multiple species [24]. PhyloP implements four different statistical phylogenetic tests to find significant departures from non-neutral substitution rates on a whole phylogeny as well as on selected subtrees (clades) of interest in the phylogeny. It was shown to have fairly good accuracy in detecting strong selection even at individual nucleotides. In one respect, DivE is similar to phyloP in that both methods try to solve the general problem of detecting an increase or a decrease in the rate of substitution in a given genomic region, either on a whole phylogeny or within a clade of the phylogeny.
    However, in phyloP the phylogenetic subtree of interest needs to be provided to the program, while in contrast DivE addresses the more complicated problem in which the lineage of interest is not pre-specified. Therefore the lineage under selection must be detected automatically by DivE from among all possible subtrees within a phylogeny. Another significant difference is that applying phyloP to an entire genome to detect selection involves using a sliding window approach. Although a sliding-window analysis is a popular method to test for negative or positive selection, there are results that show that this approach is not generally valid if selective trends are not known a priori in a given region [25]. In addition, the sensitivity of phyloP is dependent on the size of the window used to scan the genome, which in turn depends on the number of species available. DivE doesn't use a sliding window approach, but instead tries to determine the optimal size for the selected genomic element that is predicted to be under selection. In regard to these differences, DivE is more similar to DLESS [26], a method that detects sequences that have either come under selection, or begun to drift, in any lineage. While DLESS only allows for detection of a "gain" event (conservation in a phylogenetic subtree) or a "loss" event (where a subtree is evolving neutrally while the rest of the tree is conserved), DivE also detects acceleration events in any clade of the tree. DLESS is the only other computational method, prior to DivE, that can detect lineage-specific selection when the lineage of interest is not pre-specified.
    Below we present our method for detecting both conserved and accelerated regions and apply it to 14 primate genomes. We describe results on simulated and real data, including the identification of positively selected genes that intersect regions evolving faster than the neutral mutation rate. The method described in this paper is implemented in the DivE package which is available as free, open-source software [27].

    Results

    Simulation results

    For our simulation tests, we created sequence elements that were both positively and negatively selected within the same 14 primate species used for our later experiments on real data. Because we knew the precise location, size, and type of selection involved in each element, we could use this data to evaluated the accuracy of DivE and compare it to other methods.
    We created simulated data sets that contain selected elements of lengths between 50 bp and 1000 bp in all subtrees of the phylogeny of the 14 primates (see Figure 1 and Methods for a description of the primate phylogeny). Conserved elements are either "gained" or "lost" on a particular lineage, where a "gain" event implies that the region defined by that particular lineage will experience selective pressure that will tend to eliminate individuals with mutations in that region (i.e., negative or purifying selection). A "loss" event implies that the region in question does not have evolutionary constraints, and will evolve at the neutral substitution rate, while the rest of the tree is constrained. The average substitution rate observed for conserved elements is a fraction of the non-conserved regions, and we therefore can simulate negative selection by reducing the branch lengths of the selected subtree (for gain) or supertree (for loss), as depicted in Figure 2. For accelerated elements, the observed substitution rate is greater than the neutral rate.

    Stem Cell Research & Therapy tracked

    Stem Cell Research & Therapy is expected to receive its first Impact Factor in June 2012, having been accepted for tracking by Thomson Reuters (ISI). The journal launched in March 2010 and recently marked its first anniversary. Congratulations to Rocky Tuan and Timothy O'Brien, the Editors-in-Chief, and the Editorial Board for ensuring such a strong start for the journal, as indicated by the fact it will be indexed from Volume 1.

    In addition to outstanding open access research articles with a focus on stem cell therapeutics, such as a recent article from Deborah Sullivan's group investigating how human multipotent stromal cells attenuate inflammation in acute lung injury, Stem Cell Research & Therapy also publishes in-depth reviews and commentaries on the latest developments in stem cell research, which are available by subscription. Why not visit the website and check out our most popular articles, including Maya Sieber Blum's commentary on epidermal stem cell dynamics, and a review from Johnny Huard and colleagues discussing the paracrine effect of transplanted stem cells in regeneration?

    BioMed Central and ISCB dancing to the same tune

    Genome Biology’s recent waltz around the 19th Annual Conference on Intelligent Systems in Molecular Biology (ISMB) in Vienna gave us a quickstep tour around the current developments in the computational biology community, including advances in the fields of personalized medicine and the genomic “data deluge”.

    It also highlighted the acute awareness that computational biologists have of the importance of sharing data.

    The International Society for Computational Biology (ISCB), who organized the conference, are stepping up and taking the lead when it comes to endorsing the free availability of data and open access to research—a theme that was heavily present among this year's speakers. In a compelling announcement published last year, the society released the following public policy statement in support of open access:

    “The International Society for computational Biology strongly advocates free, open, public, online (i) access by person or machine to the publicly funded archival scientific and technical research literature; and (ii) computational reuse, integration, and distillation of that literature into higher-order knowledge elements”

    This ethos is fully endorsed by BioMed Central. All articles published with us have always been freely available to anyone wishing to access them, and all of our journals require that readily reproducible materials be freely available to any scientist wishing to use them for non-commercial purposes. For computational journals such as BMC Bioinformatics, we ensure that all software and data is made freely available, and we strongly encourage the deposition of all source code—the nuts and bolts of how an application works—as an additional file with every article.

    Other journals within the BioMed Central portfolio are already striking up new initiatives to create more transparent access to open data, such as the recent launch of the “Availability of Supporting Data” section in BMC Research Notes. Similarly, some are tackling the problem of deposition of massive datasets for the post-genomic era, such as GigaScience (in collaboration with the BGI in China), one of our newly launched titles.

    We also endorse all efforts to bring science to the wider community, especially where subscription costs may be prohibitive to knowledge access. BioMed Central’s initiatives to aid researchers in developing economies, and efforts to promote computational biology through the Open Access Africa program, should go some way to realising the ISCB’s aims to "empower citizens and scientists".

    In his keynote speech to close the conference, the winner of this year’s “ISCB Accomplishment by a Senior Scientist Award”, Michael Ashburner, was characteristically clear. Addressing a crowded auditorium, the pioneering computational biologist stated that he was “absolutely committed to open source publishing”, urging young researchers to “try to do your research in an open way” because “if science is not public, then it is not science”.

    Guided Meditation - Path to Physical And Mental Well-Being

    If stress and anxiety are taking over your life, you should get help of guided meditation as your stress management resource. Learn how to meditate and free your mind of worries in order to lead a healthy and peaceful life.
    The high-speed lifestyle that all of us lead today doesn't leave us much of choice other than juggling a number of tasks. Some of your time is spent enlisting the jobs that are needed to be done, some carrying out the jobs and the rest in worrying about the ones that you weren't able to finish. All this leaves you stressed out. Meditation is a great way to shift your focus from anxiety to peace. It is a complementary medicine that cures all three, mind, body and soul of a person. Meditation can help you release stress and lead a happy and peaceful life.
    By providing a state of relaxation, it helps you remove the troubled thoughts that cloud your mind and cause stress. Moreover, it helps you focus your attention resulting in improved physical and metal well-being. Studies have found that meditation is beneficial in treating various health conditions that are worsened by stress. Some of them are high blood pressure, chronic pain, fatigue, sleeping habits, depression and others. Furthermore, it also helps you control your anger and anxiety.
    When you meditate, all your tensions seem to go away. Releasing stress isn't just limited to the meditation session, it gradually eliminates the stress from your life given that you practice it on a regular basis. The true profoundness of meditation lies in the stability that you develop overtime. It helps you lead a life that remains unperturbed by anxiety and stress. Though difficulties will still come along at times, you will be able to handle them with much ease and won't be troubled by negative thoughts.
    The technique of meditation requires much practicing and can be mastered overtime. For learning to meditate, however, you need the guidance of an expert. Searching online is the easiest way to find an experienced meditation practitioner. There are some experts who provide online podcast about meditation. From teaching you the basics as well as the latest findings on meditations, helping you achieve a relaxed state of mind to guided meditations for listening while you meditate, they share expert tips and help you find what works best for you to release tension.
    Listening to a podcast is so much a better option for learning to meditate than reading about it. During a meditation podcast, you are guided by the soothing voice of a meditation expert to help you relax. Since your mind needs reason to be calm and peaceful, it should be preferred if someone guides you, taking your mind off the worries and helping you find inspiration to feel fresh and relaxed. You need someone who holds years of experience in meditation to free you of your stress.
    Besides the online meditation podcast, several clinics also hold meditation sessions where you can join meditation gurus as well as others coping with stress. Find one such clinic in your city and take an action against the stress that continues to rise. Don't wait until you have a breakdown! Contact a clinical psychologist who specializes in meditation to help you control your stress before your body goes into a tailspin.

    Five Tips for Better Meditation

    During Yoga sessions, meditation is usually practiced near the end of class. Some Yoga teachers are very strict about the exact procedure, while others take a more casual approach. In "The Journey of Awakening: A Meditator's Guidebook," Ram Dass - American psychologist and spiritual teacher - discusses the many kinds of meditation, how the process works, and what its benefits are.
    Although the book was originally published over 30 years ago, its message is as refreshing and timeless now as it was then. A reminder to stop worrying about using the "right" technique or overzealous expectations, the guide encourages the reader to find his or her own path through experimentation and practice. Below are five classic tips.
    Five Tips for Better Meditation Practice
    • Getting started
    Especially in the beginning, meditation experiences vary from boring and uncomfortable to calm and exhilarating. The state of the physical body and its posture contribute to the quality of meditation. If it is hard to maintain an erect spine, or if there is physical discomfort, body work, such as Yoga asana practice, may help to prepare for sitting. Be aware of how sleep, diet, and thoughts affect the body and mind. If necessary, make gradual changes in lifestyle. Establish a routine, preferably practicing meditation at the same time and in the same place every day. Changes in routine are not required, but they yield optimum results.
    • Finding your own path
    When learning to meditate, choose a style that feels comfortable and make adjustments as changes occur. There are many methods, including prayer, mantras, visualization, singing, ecstatic dance, walking, qigong, and Yoga, as well as contemplative and transcendental techniques. Yoga asana practice, Tai Chi, and Qigong may be used to prepare for sitting meditation. Ordinary actions, like eating, walking, or working, can become meditative practices when done with mindfulness.
    • Staying on track
    Meditation brings clarity and simplicity to daily life; like life, it flows in cycles - continuously evolving. As the meditative practice grows, choices of lifestyle and company change to meet new ways of looking at the world. Some people find encouragement in groups ranging from spiritual to secular. The choice of a teacher becomes more important with advanced practice and should be determined by personal feelings and needs. Retreats, or solitude, are important for practitioners who focus on spiritual development.
    • Getting stuck
    As meditative practice progresses, experiences of bliss or awareness may be seductive, leading to feelings of spiritual beauty, a desire for power, or a continued state of bliss. As old habits die, changes to the personality and lifestyle can be scary. Aspects of the personality that have been hidden may be visible for the first time. These stages, when simply observed, usually pass.
    • Getting free
    What feels right at one moment may not be right for the next. There will inevitably be plateaus when faith and persistence are necessary, and humor always lightens the load. In the end, every person must find his or her own truth and balance in the world.
    "There is a universal tradition to people who complete the path of meditation, who transcend their intellects, open their hearts, and come into tune with that from which the universe flows. Such beings are sages, enlightened, realized, free, children of God." Ram Dass

    How to Incorporate Meditation Into Your Busy Life

    For its well-documented benefits of improved health and emotional equilibrium, many people become interested in meditation but find it too difficult. Their mind wanders. They feel impatient. Their body gets twitchy. They can't release their worries enough to focus. Or they feel out of tune with the spiritual overtones of a particular meditation tradition they may have sampled.
    People have been practicing meditation for centuries. It is the most popular and effective way to combat stress. It is the process of achieving calmness and tranquility of the mind. In many parts of the world, doctors prescribe meditation along with other medicines for treating diseases. However, it is not so easy to make it a daily routine, especially for those who are new to meditation.
    Advantages of Meditation
    The medical and psychological benefits of meditation include reduction in stress, less tension, lower blood pressure, increased energy, improved ability to concentrate, less anxiety and a better mood.
    The good effects of meditation are not a secret. Even those who do not meditate know what it can do to your mind and body. On the other hand, people who meditate regularly rely on it to achieve peace of mind and body. It can have magical effects on your mind. It helps to maintain a balance between your subconscious mind and conscious mind.
    Meditation can also help you to tackle everyday stress and other emotional problems of life. Emotional wellbeing is very important to have a good, successful life. Meditation can slow down aging, which has been scientifically proven. It also reduces blood pressure in people with hypertension.
    How Meditation Works
    The environment where the meditation is done is a very important factor that affects its outcome. It is usually done in a silent room away from noise and other disturbances. Even the lights are dimmed to get a calm, serene environment. Such an environment will make meditation easier for anyone new to it.
    During meditation, an invisible connection is made between the body and the mind. It affects the mind at the subconscious level. It produces a change in brain waves which leads to relaxation. It also has a calming effect on the nervous system. With this, the amount of stress hormones in the body is lowered, thus eliminating stress.
    Even a beginner can experience the amount of change it makes with just one session. Daily meditation can have long term benefits. When you experience the real benefit of meditation, the negative thoughts in the mind are eliminated and are replaced with a positive attitude towards life. In turn, your whole body benefits.
    Using Guided Meditation
    Guided meditation makes it far easier to drop into a deep, stress-releasing state of calm. All you have to do is close your eyes and listen. It's compatible with any religious faith. An interesting, soothing narration invites you to envision scenes of serenity, and your body responds with a slower heartbeat and relaxed brain waves.
    There are many guided meditation options in the market. It is not difficult to find something that will make it much easier to set aside regular time for meditation by offering a variety of approaches to achieving relaxation and peace.
    The four part guided meditation program, "Pure Meditation" includes a focus on relaxing the body, achieving a positive outlook, letting go of negative feelings like anger, bitterness or resentment, and taking a healing journey through tranquil landscapes. Users can either cycle through the four recordings to keep their sessions fresh or choose the one that best corresponds to their mood and needs that day.
    Whatever you choose to use, it is possible to enjoy the incredible, scientifically proven benefits of meditation regardless of your schedule.
    What are the secrets to an anxiety-free life? What are the keys to a life of emotional freedom, health and joy? Free Videos at MindBody101.com
    Avinoam Lerner is a certified hypnotherapist and healer working mostly with cancer and chronic illness patients while providing everyone the tools to stay healthy using the power of the mind-body connection.
    Unlike other self-hypnosis audio programs, MindBody101.com's CDs and MP3s go far deeper while Avinoam Lerner's narration has an inviting, compassionate tone that engages the listener's feelings and all five senses - hearing, seeing, touch, smell and taste.

    Meditation Shows You Yourself

    Meditation shows you yourself and all your inner and outer restlessness. The simple practice of sitting quietly within oneself is surprisingly difficult. Physical discomfort arises, mental distraction too, and emotional turbulence sometimes overwhelms us.
    Perhaps the biggest difficulties are found among the small, insidious phenomena -- irritability, planning, not being able to resist making a phone-call or writing down a reminder to do something. If -- and it may be a big if -- we can surmount all these obstacles then the rewards are great; a tranquil sense of inner abiding, or being in oneself, a serenity which no amount of pretence can get close to and an experience of inner peace of rectitude and honoring life, movements of grace and wisdom that surfaces in you like reflections of the sky in a still lake. Finally meditation shows you yourself, so what are you waiting for?
    It is a flawless guide to your ego's attempts to fail you in becoming your true self, learning to live from the stillness of compassion, centering, learning and practicing inner guidance and cultivating inner peace. Only through thorough in-turning do we learn who we really are, beneath the level of facade and disguise we have presented to the world for so long. This experience is a great home-coming and a simple gift of authenticity. When we arrive the heart opens in an unmistakable way and we become capable of compassion, quietly caring, profoundly kind. The heart becomes our new and constant, genuine center and a reservoir and source of inner peace and guidance.
    Meditation is the dependable link to your source and self-abiding truth; it is the essential spiritual practice for all serious aspirants on the spiritual path, because it urges you towards awakening to transcendence, and ultimately to the divine. What other way, other than sitting quietly, can direct us to ourselves? It is openly available at any time. When we practice just sitting, quietly allowing thoughts, feelings and all kinds of experiences to go by, we become identified with our awareness which in turn lodges us firmly in truth. It is the central practice in spirituality because it is the closest we can get in holistic form to the experience of complete emptiness and profound fullness, both at the same time.
    This presence, residing in the opposites short-circuits the rational mind and expands into areas of truth, the unknown and the truly spiritual. For there are no truly spiritual experiences, and no rationally or intellectually expressed truths. We can only point at the moon, only speak in image and metaphor, simile and symbol to express the timeless truths of the perennial philosophy; that which has always been, always is and always will be.

    Sunday, March 20, 2011

    Biomedical Cooptation of the Psychosocial Care and Support Continuum for Severely Distressed Persons

    Abstract:
    In this issue of Ethical Human Sciences and Services, Lehrman describes his vision, focusing on continuity of care, of a mental health care system for psychosis. His main argument is that the same psychiatrist should treat an individual patient whatever the settings (hospital, community) that the patient shifts through, and that the psychiatrist is the key treating professional and as such should manage and direct care over the continuum. While continuity of psychiatric care is desirable and indeed noncontroversial and feasible, psychiatric services are not central to the care continuum, and its psychiatric control will lead to an even more biomedical orientation in patient care. This would undermine another key aspect of Lehrman's vision: a mental health system focused upon the whole person in interaction with the environment. The history of psychiatry shows that, as a medical specialty, psychiatry will inevitably focus upon the brain rather than the person. Psychiatric care could serve as adjunct to appropriate supports, services, and treatment, but if it determines them, they will merely become a downplayed accessory of biomedical (i.e., psychotropic drug) treatment.
    Document Type: Miscellaneous
    Affiliations: 1: CLSC Haute-Ville-des-Rivières (GRIOSE-SM) and Laval University Québec City, Canada
    Publication date: 2003-01-01

    Biomedical treatment autism (DAN doctor)

    I am a physician specializing in the biomedical treatment of autistic children. I have offices in arizona , nevada, and california. I need articles to post on my website trinityalternative.com relating to the biomedical treatment. Articles can be on the special diets, SCD, GFCF, low oxalate etc, yeast treatment, testing, treatments or other relavant issues. I think the best qualified person has an autistic child and is doing the biomedical treatments. This is very specific and i hope i can find the some qualified writers. I do not have the time to write what i need because i am extremely busy with patient care. I have two M.D. degrees, one traditional allopathic and i am the only Homeopath who combines these skills to treat patients.

    Geoffrey P Radoff, M.D., M.D. (h)

    What is Biomedical Treatment?

    Childhood neurological disorders (NDs) are typically diagnosed by professionals with psychology and psychiatry backgrounds. Parents are often told that their child’s diagnosis is the result of genes and is psychological in nature. Typical “psychological” manifestations of these NDs in children may include delayed speech, lack of eye contact, impaired or non-present social skills, shyness, perseverative behavior (doing the same thing repeatedly), delayed gross or fine motor skills, sensory integration issues (sound and touch sensitivity, etc.), not responding to one’s name, inflexibility with transitions, and major, often unexplained, changes in mood.
    Yet, the physical or medical issues that these children often share are rarely noted or discussed. Typical physical manifestations of children with NDs may include food allergies and eczema, general gastrointestinal distress, constipation and diarrhea, yeast overgrowth, immune system disregulation, and sleep disturbances. Typically, proper testing also reveals high levels of environmental toxins relative to neurotypical children.
    What has happened to our children? We believe our children’s bodies are overwhelmed by a combination of heavy metals (mercury, lead, aluminum, etc.), live viruses (particularly from vaccines), and bacteria. These toxins serve to slow or shut down normal biochemical pathways in the body and lead to the physical and mental manifestations we call NDs. Perhaps the best description of what happens to our children is Autism: A Twisted Tale of Virus and Thimerosal, by Dr. Amy Yasko.
    Biomedical intervention for NDs is based on the belief that the psychological symptoms of NDs are a product of the physical issues the child is experiencing and that addressing the physical issues will lead to an improvement in the psychological symptoms. (We were very pleased to read the recent cover story in Discover magazine that clearly spells out that autism is “not just in the head” but may actually originate in the gut and from environmental toxins.)
    The following is our best attempt to get you started on the path to healing your child. This is not medical advice. It is the opinion of parents, not doctors. The most important thing you can do as a parent is find a qualified physician to help you treat your child. All that is written here is for informational purposes only.
    The ultimate goal of biomedical treatment is to remove environmental toxins from your child’s body and repair the damage that has been done. Today, there is a bewildering array of potential treatment modalities for parents to follow. Some of the most popular include:
    The DAN Protocol. DAN, or Defeat Autism Now!, is a project of the Autism Research Institute. The DAN Protocol is not a clear and explicit protocol, per se, but rather a general approach to treating children that is being followed by a group of doctors known as DAN doctors. The best resource to get a background in the DAN approach is the book Children with Starving Brains, written by Jaquelyn McCandless, MD, a DAN doctor. A complete list of DAN doctors is available at www.autism.com/dan/ danusdis.htm. DAN Conferences are held for parents twice a year. Yahoo discussion groups that include parents working with DAN doctors include ChelatingKids2 and ABMD.
    The Cutler Protocol. Andy Cutler is a scientist who developed a protocol for removing heavy metals from the body. His protocol is detailed in his book, Amalgam Illness, and through the Yahoo discussion group Autism-Mercury. Many of the parents using the Cutler Protocol to remove toxins from their child’s body are also using a DAN doctor and many of the DAN approaches to treatment.
    Dr. Amy Yasko. Dr. Yasko’s approach to treating children with NDs has many similarities to DAN, but focuses treatment on the specific genes of the child, providing a roadmap that some parents believe is more customized. Her approach is also more focused on the removal of viruses and bacteria from the child’s body. Learn more through her websites, www.dramyyasko.com and www.holistichealth.com, her parent discussion group, and her book, The Puzzle of Autism: Putting It All Together.
    Michael Lang’s Natural Detoxification Program. Michael Lang is the founder of Brainchild Nutritionals, a supplement company serving children with NDs. Recently, he published a helpful guide with his own recommendations for how to detoxify a child with an ND safely and effectively.
    Methyl B12 and Valtrex. A number of parents have experienced particular success using a combination of Methyl B12 (a vitamin) and Valtrex (a prescription drug that suppresses viruses). This approach has been spelled out by a parent who recovered his son from autism, Stan Kurtz.
    Homeopathy. Many parents report great results using homeopathy. The best description of this approach is available in a book written by a parent, The Impossible Cure. Also, check out the discussion group run by the Homeopathy Center of Houston serving children with NDs.

    Most parents employ some combination of the above approaches in treating their child. It can be frustrating for a parent to realize how varied the treatment approaches can be, which is why it’s critical to find a doctor to work closely with to find the right approach for your child. Reading about biomedical treatments for NDs is very overwhelming and it is helpful to keep the “big picture” in mind. The 4 most important things you can do to help heal your child are:
    1. Bring down the toxin load.
    2. Help the gut heal.
    3. Get the nutrients up.
    4. Get the metals and other toxins out.

    Autism Treatment - Biomedical Treatments for Adults With Autism

    I would like to talk a little bit about something with respects to adults who are on the Autism spectrum. The issue is the word "cure" that has been used within the biomedical community for several years. Not all doctors use the word cure but also some individuals who use the word cure as a goal or potential for those with Autism. I understand that the use of this word has created controversy and/or sparked anger within our Autism community, especially from adults who have Autism.
    I want to state my perspective clearly, I have never used the term "cure" in any of my dialog regarding the biomedical treatments for Autism. While I have seen people "recover" from the underlying medical issues they were dealing with, the term "cure" implies a complete change of the underlying personality or the issues that are occurring in someone with Autism. I choose not to use that word and can certainly understand the frustration or disagreement some individuals with Autism have with its use.
    I see biomedicine as more than just a diet, giving supplements, or giving certain medications. It really is about exploring the clinical health of an individual. And many times there are underlying issues that need to be addressed like biochemical imbalances, vitamin and amino acid deficiencies, dietary allergies, digestive problems or whatnot, and when they are addressed you see changes in cognition and improvement in their quality of life, whether they are a child, teen or adult with Autism. We are talking about optimizing someone's health, not "cure", and to me, there is nothing wrong with trying to optimize someone's potential. I believe that improving the overall health of an individual should be the focus of every health pursuit, not to alter someone's personality. When you make these changes you find that the brain, immune system, gut, heart, lungs and body all function better.
    The fact is that many people with Autism suffer from, for example, issues with their digestive tract. By addressing those issues you don't have "recovery" necessarily but you do have an individual who feels better. And when you decrease pain and discomfort in their gut, they can then digest food better and they have less bowel issues and function better. It almost goes without saying that if you remove the physical pains, you can increase mental capacity and mental harmony.
    So I wanted to talk about these issues in adults with Autism because I mostly see children in my practice but I have worked with adults who face the same health challenges as the children. And occasionally I will see an adult with Autism who has a child on the spectrum as well which then can show you just how much these things go hand in hand. So it is all about optimizing health, improving function so that the individual is able to reach their full potential, whatever that may be. We don't have to use the term "cure" but rather we can talk about the improvement in health and functionality.
    Autism really is treatable! Biomedical Autism treatments and therapies have resulted in many, many children improving, or even even losing their autism-spectrum disorder diagnosis. For lots more free biomedical autism intervention information and videos from Dr. Woeller, go to http://www.AutismRecoveryTreatment.com.
    Dr. Kurt Woeller is an biomedical autism Intervention specialist, with a private practice in Southern California for over 10 years. He has helped children recover from autism, ADD, ADHD, and other disorders, and has the information you need to help your child. Download his free ebook at http://www.AutismActionPlan.org.

    Recognizing speculative language in biomedical research articles: a linguistically motivated perspective Citation: BMC Bioinformatics

    Abstract Background Due to the nature of scientific methodology, research articles are rich in speculative and tentative statements, also known as hedges. We explore a linguistically motivated approach to the problem of recognizing such language in biomedical research articles. Our approach draws on prior linguistic work as well as existing lexical resources to create a dictionary of hedging cues and extends it by introducing syntactic patterns. Furthermore, recognizing that hedging cues differ in speculative strength, we assign them weights in two ways: automatically using the information gain (IG) measure and semi-automatically based on their types and centrality to hedging. Weights of hedging cues are used to determine the speculative strength of sentences. Results We test our system on two publicly available hedging datasets. On the fruit-fly dataset, we achieve a precision-recall breakeven point (BEP) of 0.85 using the semi-automatic weighting scheme and a lower BEP of 0.80 with the information gain weighting scheme. These results are competitive with the previously reported best results (BEP of 0.85). On the BMC dataset, using semi-automatic weighting yields a BEP of 0.82, a statistically significant improvement (p <0.01) over the previously reported best result (BEP of 0.76), while information gain weighting yields a BEP of 0.70. Conclusion Our results demonstrate that speculative language can be recognized successfully with a linguistically motivated approach and confirms that selection of hedging devices affects the speculative strength of the sentence, which can be captured reasonably by weighting the hedging cues. The improvement obtained on the BMC dataset with a semi-automatic weighting scheme indicates that our linguistically oriented approach is more portable than the machine-learning based approaches. Lower performance obtained with the information gain weighting scheme suggests that this method may benefit from a larger, manually annotated corpus for automatically inducing the weights.

    Biomedical model

    The biomedical model of medicine, has been around for centuries as the predominant model used by physicians in the diagnosis of disease. The term is used by practitioners of Natural Health, a form of alternative medicine, in contrast to the biopsychosocial model, which incorporates psychological and social factors.

    This model focusses on the physical processes, such as the pathology, the biochemistry and the physiology of a disease. It does not take into account the role of a person's mind or society in the cause and treatment.
    This model is effective at diagnosing and treating most diseases. It cannot be denied that it has been extremely useful throughout history by establishing the reasons that a disease occurs, and in coming up with very effective treatment regimes.
    It is however very limiting. By not taking into account society in general, the prevention of disease is omitted. Many diseases affecting first world countries nowadays, such as heart disease and diabetes mellitus are very much dependent on a person's actions and beliefs.

    Citation in biomedical journal articles

    Abstract

    To determine how biomedical scientists use the published work of others in their journal articles, the first two references, source articles, were compared to their citing article in seven citation trees containing 49 experimental or descriptive articles. In addition, a group of practicing biomedical scientists was surveyed to discover their perceptions of citation practices. Although five scientists mentioned the use of direct quotation, only two trivial instances, from a single author, were found; paraphrase was limited to three authors; the majority of instances were summary from a single source or generalization from two or more. For journal articles, only the latter two citation types need be taught to novice writers. Because students may be tempted to use others' wording, it may be advisable to teach paraphrase, while taking care not to recommend it. Teachers are advised to acquaint students with a range of ethical questions.

    Article Outline

    • References
    * Betty Lou Dubois received her Ph.D. in 1972 from the University of New Mexico Program in Linguistics and Language Pedagogy. Since then she has taught at New Mexico State University, where she is now Professor of Communication Studies, TESOL Coordinator, and head of the MA program. Her major research interest is biomedical communication, both written and spoken, including its sociological aspects.

    What is BioMedical Engineering OnLine?

    BioMedical Engineering OnLine is an Open Access, peer-reviewed, online journal that is dedicated to publishing research in all areas of biomedical engineering.
    BioMedical Engineering OnLine is aimed at readers and authors throughout the world with an interest in using tools of the physical sciences to advance and understand problems in the biological and medical sciences. There are biomedical engineers in countries throughout the world, and the results of their work are scattered and often difficult to access. This publication promotes the rapid and free accessibility of articles for biomedical engineering researchers everywhere. The result is a worldwide community of biomedical engineers who are linked together by their various research interests and their values in promoting benefits to all of humanity.
    Content overview
    BioMedical Engineering OnLine considers the following types of articles:
    • Research: presenting new work based on the highest standards of basic or applied academic research.
    • Book reviews: presenting short summaries of the strengths and weaknesses of a book. They should evaluate its overall usefulness to the intended audience. Please contact Francisco Azuaje (fj.azuaje@ulster.ac.uk) with your Book review proposal.
    • Letters to the Editor: can take three forms: a substantial re-analysis of a previously published article, or a substantial response to such a re-analysis from the authors of the original publication, or an article that may not cover 'standard research' but that may be relevant to readers.
    • Reviews: presenting a comprehensive and authoritative description and evaluation of a current scientific or research area within the journal scope, these articles are usually written by opinion leaders that have been invited by the Editorial Board.
    Peer review policies
    All articles are reviewed by at least three experts from the relevant field. The reviewers consider the technical aspects of the material presented, in terms of scientific validity and usefulness. Authors are given every opportunity to alter their submission and/or to respond to the comments.
    Edited by Kenneth R. Foster, BioMedical Engineering OnLine is supported by an expert Editorial Board.
    Publishing in BioMedical Engineering OnLine
    All articles are listed in PubMed immediately upon acceptance (after peer review), and are covered by PubMed Central, MEDLINE, Thomson Reuters (ISI) and Embase.
    Articles in BioMedical Engineering OnLine should be cited in the same way as articles in a traditional journal. However, because articles in this journal are not printed, they do not have page numbers. Instead, they have a unique article number.
    The following citation:

    BioMed Eng OnLine 2004, 2:1

    refers to article 1 from volume 2 of the journal.
    As an online journal, BioMedical Engineering OnLine does not have issue numbers. Each volume corresponds to a calendar year.
    To keep up to date with the latest articles from BioMedical Engineering OnLine, why not register to receive alerts? Registration also enables you to customise your subject areas of interest, store your searches, and submit your manuscripts.
    Submission of manuscripts
    Manuscripts should be submitted electronically to BioMedical Engineering OnLine using the online submission system. Full details of how to submit a manuscript are given in the instructions for authors.
    General journal policies
    BioMedical Engineering OnLine is published by BioMed Central, part of Springer Science+Business Media. BioMed Central is committed to ensuring peer-reviewed biomedical research is open access. That means it is freely and universally accessible online, it is archived in at least one internationally recognised free access repository, and its authors retain copyright, allowing anyone to reproduce or disseminate articles, according to the BioMed Central copyright and licence agreement. BioMedical Engineering OnLine however, has taken this further by making all its content open access.
    BioMedical Engineering OnLine's articles are archived in PubMed Central, the US National Library of Medicine's full-text repository of life science literature, and also at INIST in France and in e-Depot, the National Library of the Netherlands' digital archive of all electronic publications. The journal is also participating in the British Library's e-journals pilot project, and plans to deposit copies of all articles with the British Library.
    BioMedical Engineering OnLine is able to deliver summaries of frequently updated content via Really Simple Syndication (RSS) feeds. These are accessible via the orange "XML" button at the top of the list of recent articles or the list of most accessed articles. For more information about RSS feeds see our publisher's website.
    If you would like to help raise awareness of BioMedical Engineering OnLine, why not download the journal's leaflet and poster? You will need Acrobat Reader to open them.
    For further information about general policies please see the instructions for authors.

    Tuesday, March 15, 2011

    New Drug Shown Effective in Blocking HIV Entry

    A research team led by Dr. Pin-Fang Lin at Bristol-Myers Squibb, Wallingford, CT has discovered a small molecule compound that can block HIV-1’s entrance into cells (Lin, P.-F. et al., PNAS 100:11013-11018, Sep. 16, 2003). Most of the drugs currently available for treating HIV infection affect replication of viral nucleic acids or the synthesis of viral proteins.
    The compound, BMS-378806, binds to the envelope protein, gp120, of HIV-1 and inhibits interactions between gp120 and the CD4 receptor molecule on CD4+ T cells, a necessary step for HIV-1 to infect host cells.
    The inhibitory effect of compound BMS-378806 is selective for HIV-1. It is inactive against HIV-2 (a less virulent, primarily West African virus similar to HIV-1), simian immunodeficiency virus, and other viruses tested. The compound exhibits other encouraging pharmacokinetic amenities such as low protein binding and minimal impairment of the compound by human serum. Tests in animals showed that the compound is safe, with acceptable toxicity profiles.
    The compound targets a specific HIV-1 protein that does not exist in human cells. It is a novel approach for HIV-1 therapies. It represents a hope that HIV-1 can be stopped before it infects cells. This class of drugs can be used in combination with other drugs to achieve maximum deterrence of HIV-1 infection.

    Three trials with strong financial supporters test Viread as a preventive drug for HIV infection

    Three clinical trials starting this year will test the effectiveness of Viread (tenofovir disoproxil fumarate) in preventing HIV. Viread, a nucleotide reverse transcriptase inhibitor, is currently approved to treat patients already infected with HIV. Clinical studies showed that Viread is relatively less toxic and less prone to the development of resistance towards it. Gilead Sciences, Foster City, CA makes and markets Viread since 2001 with estimated sales of $550 to $570 million in 2003.
    Several years ago, a research team headed by Dr. Roberta Black at the University of Washington’s Regional Primate Research Center in Seattle, published a report in Science demonstrating Viread’s effectiveness in preventing simian immunodeficiency virus (SIV) infection in monkeys (Tsai CC et al., Science 270:1197-1199, Nov. 17, 1995). The effectiveness of Viread [then called (R)-9-(2-phosphonylmethoxypropyl)adenine (PMPA)] was tested both pre- and post-exposure in preventing SIV in macaques as a model for HIV prevention in humans. Viread was administered beginning 48 hours before, 4 hours after, or 24 hours after virus inoculation. The once daily treatment was continued for 4 weeks. Virologic, immunologic, and clinical parameters of the macaques were monitored for up to 56 weeks. Viread prevented SIV infection in all macaques without toxicity, whereas all control macaques became infected. The results indicated that Viread was able to prevent the SIV infections in monkeys and suggested that it may have similar effects on HIV in humans.
    The Bill and Melinda Gates Foundation will pay $6.5 million to test Viread in 2,000 people in Cambodia, Ghana, and other countries. The U.S. National Institutes of Health has awarded a $2.1 million grant to the University of California to evaluate Viread in 960 Cambodian women including many at-risk prostitutes. The U.S. Centers for Disease Control is paying $3.5 million for testing in 400 uninfected gay and bisexual men.
    HIV has so far infected about 40 million people worldwide and is spreading rampantly in parts of Africa and Asia. Because it does not have to be taken repeatedly, a vaccine would be a more effective means to slow the rate of transmission but development has proven elusive and no vaccine is predicted to be available for at least the next decade. At the present time, a drug may be the best means to slow the spread of HIV.

    Recent Advances in Biopolymers and Biomedical Materials

    In this overview of recently published scientific literature, the authors provide a snapshot of current research trends in biopolymers and biomedical polymers. During experimentation to improve product benefits, the personal care industry eagerly formulates with new and different materials and ideas. Sometimes these new materials are generated within the industry while other times, they are borrowed from other sectors. In reviewing the current scientific literature, the authors hope to encourage readers to innovate by technology transfer and by gaining a better understanding of biopolymers at a time when they are escalating in importance.

    A Biomedical Look At Spaceflight

    Mary Roach, author of previous entertaining books Bonk (a history of sex research) and Stiff (a history of cadaver research), has turned her considerable talents in translating decades of research into a readable review of human (and animal) spaceflight experimentation.
    The title of her new book, Packing for Mars: The Curious Science of Life in the Void, is a bit of a misnomer — only the last chapter is devoted to the medical advances needed for a trip to Mars. However, it is a great layman’s history of the biomedical results of both the American and Russian space programs.
    Through my own research and academic career I’ve been peripherally involved with many of the recent studies she mentions in the book, and I know many of the people she interviewed, so I give her credit for taking some fairly complicated concepts and distilling them to relevant anecdotes and asides.
    Her characterizations of the individuals I know is spot on and I can hear their voices in the quotes she uses. Roach breaks the book down roughly into large projects, rather than by physiological areas or research fields, such as cadaver tests for the next space capsule, space food packaging, simulated environments, microgravity flights, Japanese astronaut selection, porn filmed partially in microgravity, and nausea experiments.
    Each chapter typically focuses on some large effort and builds context by peppering in the results from other studies and an interviews with experts in the field. The resulting chapters are pretty independent and, aside from a transition paragraph at the end of each, could probably be read in any order. This style of writing is familiar to anyone who has read Roach’s other books.
    Roach accurately notes NASA and the space program’s role in the development of medical technology, although the NASA Public Affairs Office may put it differently when promoting the positive benefits of space flight; NASA sees medical technology as a means, not an end. She mentions that most medical technology that helps increase efficiency, redundancy, reliability, or decrease size, mass, and power requirements were worked on or considered by NASA and related agencies at some point. Not because NASA’s charter includes helping the world, but because it helps get more stuff off the ground with the constraints inherent in spaceflight.
    The book includes interviews with researchers in the National Space Biomedical Research Institute (NSBRI), a group we have mentioned many times here on Medgadget, which functions as NASA’s academic research arm. NSBRI researchers tend to be a little easier to talk to about the topics Roach covers in the book, mostly because they don’t have to go through NASA Public Affairs. [Disclosure: My thesis work has been partially funded by both NASA and NSBRI, so I have a sense of the bureaucratic issues, and there are many.]
    Overall, I would recommend this book to anyone interested in what the body goes through in spaceflight, and how we are preparing for those challenges. Regardless of familiarity with the subject matter, Mary Roach’s book is informative and entertaining, showing a well-thought out perspective on medical research in spaceflight.
    Link: Packing for Mars: The Curious Science of Life in the Void
    *This blog post was originally published at Medgadget*

    Biomedical Autism Treatment – Exercise and Autism

    I want to talk a little bit about the role of exercise and treatment of Autism. Some recent information has come out that discusses how exercise impacts depression. What research seems to be finding is that for individuals who get regular exercise, which means at least 30 minutes per day, 3 to 5 times per week, they had significantly reduced rates of depressive issues, by 45%. And given that in our country we primarily treat depression using ant-depressive medications, this new information is very significant. Just simply getting enough aerobic exercise each week, 30 minutes a day and between 3 and 5 days per week, can reduce depression significantly.

    Over the course of treating children in my practice for years, I too have seen the benefits of children with Autism who get regular exercise. They seem to function better, that can mean better behavior, better attention, better focusing, less anxiety, etc. And yet for children, the definition of exercise can be different than that of an adult. Going to a park and letting them run and play on the equipment can be great exercise. They have the opportunity to run, climb and swing. Another wonderful activity for kids is riding their bike. Swimming is also a great activity, as is just about anything that lets them be physically active. I really do encourage parents to let their children get out in the fresh air and natural sun light, especially now that summer is here and the days are getting longer. Let your child explore, play and run if that is something that they seem interested in.

    We see more and more children who spend most of their time inside, usually stuck on the computer or stuck on video games or watching movies. And many children with Autism spend many hours a day in therapy sessions. After their therapy sessions they can tend to be anxious, hyper, agitated, and have trouble sleeping. What can make a world of difference is making sure your child also gets some exercise. A nightly walk after dinner can be a great place to start. And remember, it is not all about supplements, it is not just about medications, it is not just about a diet. Sometimes a change in attitude comes from good physical exertion and physical exercise, it can put your child with Autism in a better mental state.

    Who’s afraid of the recent biomedical heritage?

    As biomedicine – the fusion of cell biology, molecular biology and information technology with clinical diagnostics and therapeutics – is emerging as a significant part of contemporary society and culture, it is time for university museums to take biomedicalization seriously. The Medical Museion at the University of Copenhagen is presently trying to resolve the museological problems that are raised in making sense of recent biomedical artefacts. Traditionally, museums deal with tangible material objects: good medical museum artefacts are concrete, sensual and spectacular, they are immediately understandable; they elicit memories, and evoke emotions. The emergence of recent biomedicine, however, challenges this classical notion of material objects as familiar, tangible, and sensuous. Today’s biomedical objects are abstract, non-tangible, and difficult to understand; they elicit few memories and hardly evoke any emotions. The challenges of recent biomedicine to university museums are illustrated with reference to three examples: gene microarray analysis, PET scanning, and molecular therapy. The paper concludes that medical museums today are caught in a paradox. On the one hand, biomedical research and technology fills more and more of our lives, from neonatal care to terminal intensive units. On the other hand, the whole idea of what constitutes a medical museum collection and what is displayable and easily understood by visitors in a medical museum exhibition becomes questionable.
    Medicine is one of the oldest and most venerated ingredients of the world’s cultural and scientific heritage. Consequently medical artefacts feature prominently in many university museum collections. With respect to the historical time range covered, however, almost all museums deal with what might be called ‘modern medicine’, that is, they mainly contain artefacts and ideas that represent the medical practices of the modern era, from seventeenth century anatomical specimens to late-twentieth century mechanical medical instruments. With few exceptions, museums have not yet taken the rapidly growing biomedical culture of our present age into account, and so far no museum has made systematic efforts to document the recent biomedical heritage.
    I suggest it is time for university museums to take biomedicine — that is, the fusion of cell biology, molecular biology and information technology with clinical diagnostics and therapeutics — seriously. The reason is, of course, that biomedicine is emerging as a significant formative part of contemporary society and culture. The discovery of the structure of DNA in 1953 and the subsequent rise of molecular biology have radically changed the research agendas, strategic decisions, and curricula of medical faculties over the last decades. A rapidly growing number of new molecular technologies have changed diagnostic and therapeutic methods beyond recognition; today’s clinical biochemical laboratory is a highly sophisticated and robotized molecular diagnostic system and gene therapy is becoming clinical reality. Digitalization too has changed biomedical research and clinical practices drastically in the last decades. Medical research is highly dependent on computerized methods. Clinical departments like neonatal wards or intensive care units are as digitalized as the cockpit in a modern aircraft. Diagnostic imaging tools like CT-, MR- and PET-scanning would be impossible without advanced digital technology.
    This combined process of molecularization and digitalization of the laboratory and the clinic (in other words, biomedicalization) is embedded in a broader social and cultural context. The many (and often politically mediated) interactions between the transnational ‘biomedical-industrial complex’ and the steadily growing popular demand for better health care are turning biomedicine into a significant player on the global economic arena. Biomedicine has also entered the political scene. While some view its recent developments as a threat to basic human values, others see it as a key to the future of humankind. New technologies such as stem cell manipulation, cloning, and tissue engineering have raised both professional and popular expectations of the powers of biomedicine to combat, for example, cancer and degenerative diseases.
    How can university museums accommodate to these material and discursive changes in the medical landscape? What consequences will the recent revolution in biomedical research and clinical development have for medical history collections and exhibitions? In the Medical Museion at the University of Copenhagen we are presently trying to resolve these and similar questions. In this paper I will discuss one of the museological problems raised, viz., how to handle the abstract and non-tangible character of many recent biomedical objects.
    The Medical Museion is the continuation of the Medical History Museum in Copenhagen, founded by a private initiative in 1906. The rapidly expanding collections were taken over by the university in 1918, and thirty years later they were moved to their present location in the former Royal Academy of Surgeons and adjacent buildings. Today the University of Copenhagen owns one of the largest and most diversified medical history university collections in the world, including thousands of obstetric, radiological, opthamological, dental, and surgical instruments, several complete apothecaries and old pharmaceutical laboratories, an interesting assortment of microscopes, and a world-famous osteopathological collection from medieval leprosaria. Altogether the collections comprise approx. 60.000 registration units (a registration unit may contain many separate physical items so the number of individual objects probably exceeds a hundred thousand); in addition there are close to 100.000 iconographical items, a library of 30.000 volumes, and approx. 4000 archival units, including hospital patient records from the late eighteenth century and onwards. Only a small proportion of this material is displayed in the public exhibitions; most is kept in storage or in special ‘study collections’ for specialists.
    Like most other medical university museums, the collecting and exhibition activities of the Medical History Museum were focused on ‘modern medicine’, especially on instruments that documented the triumph of the modern medical profession in the late nineteenth and first half of the twentieth century. But in recent years the museum has changed its orientation. The incentive for this move was the fact that the museum had stagnated since the 1970s; there were no research activities of any significance, the collections were run by amateur curators, and the exhibitions had not been revised for decades. A devastating report by The Danish State Board of Museums in 2000 raised negative headlines (‘Chaos in the museum’) in the Danish medical weekly, and induced the Faculty of Health Sciences to take its responsibility as owner. A year earlier, the chair in history of medicine had been filled to boost medical history research; in the following years three new museum positions were announced. Basic funding was increased as well, and in 2003 the faculty gave its unanimous support to a five-year plan for re-conceptualizing the former Medical-History Museum as a Medical Museion.
    The Medical Museion concept is two-pronged. The basic idea is that research, teaching, collection activities and public outreach (including exhibitions) are closely integrated activities that mutually support each other. The classical notion of ‘museion’ has been chosen to symbolize the bridging of the gap between a traditional academic medical history research and teaching culture focusing on the production of texts (articles, books), and a traditional curatorial culture dealing with the acquisition, preservation and exhibition of material objects and images. In daily practice, this bridging means that both research and museum staff attend the weekly seminar dealing with all aspects of the institution, from registration systems and conservation methods to the history and philosophy of biology and the interaction between biomedicine and art; guest speakers include medical researchers, historians, ethnologists, museologists and artists. In other words, instead of making the traditional distinction between an academic university department and a museum, research, curating and acquisition are considered to be closely related forms of ‘inquiry’, and scholarly publishing, teaching and exhibitions are seen as closely related aspects of ‘presentation’.
    The other main idea behind the Medical Museion concept is to shift the focus to the understanding, documentation and presentation of recent biomedicine in its social and cultural context. From the point of view of our university identity this shift of focus is advantageous as a growing number of conferences, monographs and research articles on different aspects of biomedicalization have appeared in the last decade. In other words, we are joining a growing trend among historians of science, historians of medicine, and scholars of science studies to investigate the recent history of biomedicine.
    From the point of view of our museum identity, however, the new focus on recent biomedicine does raise some problems. With the exception of the Science Museum in London, very few museum institutions have taken the recent biomedical revolution seriously, and even fewer have begun to systematically acquire biomedical artefacts. Most medical history exhibitions still present medicine as it were in the period from the late eighteenth to the mid-twentieth centuries, that is, before molecular biology and information technologies began to change its face.
    However, if (or rather when) museums begin to pay attention to recent biomedicine, they will be running into a major museological problem. This problem has to do with the object character of biomedical artefacts. Traditionally, museums are institutions that deal with material objects and material culture. The key-word here is tangibility — and medical museums are no exceptions, filled as they are with surgical instruments, microscopes, contraceptive devices, iron lungs, hospital beds, anatomical specimens, and so forth. Medical museum curators usually do not consider it a problem to define what an ‘object’ is, or what constitutes a ‘good’ museum object. Good objects are concrete, sensual and spectacular, like foot-driven dentist’s drills, siamese twins in jars, amputation saws, and trepanation instruments in handy travel sets. These and similar objects are considered ‘good’ objects because they are made of easily recognizable materials and resemble familiar tools; they are immediately understandable and also appeal to our fear of pain and death; they trigger the visitor’s attention, elicit memories, evoke emotions, and make us pause in front of the objects with a sense of curiosity and wonder. The lithoclast — an instrument invented in the early nineteenth century to crush bladder stones through the urethra (thus lowering the risk and pain of classical stone cutting) — is an archetypically ‘good’ medical history exhibition object. Young male visitors to the Medical Museion regularly turn pale when they realize how the instrument was used — before anaesthesia.
    The emergence of recent biomedicine, however, challenges this classical notion of material objects as familiar, tangible, and sensuous. Today’s biomedical objects are neither familiar, nor tangible; neither sensuous, nor emotionally evocative. To illustrate the challenges of recent biomedicine to university museums, I will shortly discuss three cases: gene microarray analysis, PET scanning, and molecular therapy.
    Microarray analysis is one of the most sophisticated methods in post-genomic medicine. Based on the fact that the degree of hybridization between single-stranded oligonucleotide molecules is a measure of their similarity, it uses arrays of hundreds of thousands of specific oligonucleotide sequences as probes to map an unknown RNA/DNA-sample; this makes it possible to gauge the gene expression level of the entire genome (that is, which genes are ‘on’ and which are ‘off’) in one single run. The analytical power of the method has ushered a rapid growth of expectations in the biomedical research community and the pharmaceutical industry to use it as a major diagnostic and therapeutic tool, for example for individualized drug treatment: ‘The explosion in interest in DNA microarrays has almost been like a gold rush’, proclaims a textbook in the field.
    The most widely used and best known microarray platform, the Affymetrix GeneChip®, was invented in the late 1980s and came into industrial production a few years later. By combining information technology and molecular biology the GeneChip embodies the very essence of biomedicine. It illustrates the restructuring of health-care in the advanced post-industrial societies towards increased individualisation of diagnostics and treatment. Also, by drawing on globally produced and globally available sequence data bases it epitomizes another salient aspect of the biomedical revolution, viz., its integration in the process of globalization. Furthermore, as one of the few biomedical technologies that has made it to the front-page of Financial Times, the GeneChip is an example of how cutting-edge university research often has given rise to successful private enterprises (the ‘Silicon Valley effect’) over the last decades. Finally it reminds us of Peter Sloterdijk’s point that biotechnology, for better or for worse, can make the old vision of eugenics come true. The Affymetrix GeneChip thus provides an ample focusing point for historians of recent biomedicine and biotechnology.
    For museums curators, however, the GeneChip poses a problem. What is immediately available for display is just the handy 1 x 2 inch plastic casing where the hybridization reaction takes place. The ½ x ½ inch ‘chip’ inside, with some half million oligonucleotide molecular-sized probes attached to it, is not immediately visible, or intelligible. The result of the test is only visible indirectly; the genome data are produced by reading the hybridization pattern on the chip with a laser scanner (which looks like an advanced coffee machine) and the result is interpreted by a computer program. It is hardly necessary to say that the GeneChip technology, which is now revolutionizing medical diagnostics, makes poor museum objects because all the components of the platform are abstract, intangible and hardly evoke any memories or strong emotional reactions.
    The PET (positron emission tomography) scanner, too, illustrates the problem of displaying new biomedical artefacts in a museum exhibition. The instrument is built to produce images representing the inner metabolism of the body; information that is indeed useful for diagnostic purposes. The patient is injected with glucose molecules marked with a short-lived isotope that emits positrons that can be measured by a detector. The ensuing data are then interpreted by a computer program to represent slices (tomography) of the spatial distribution of glucose metabolism in the body on a screen. For example, the screen image of metabolism in the brain of patients with Alzheimer’s disease is significantly different from that in ‘normal’ patient brains.
    The PET-scanner is an impressive piece of combined digital and molecular technology which has already had great impact on medical diagnostics. An update of earlier imaging technologies, like X-ray, as it were — and as such it is a ‘must’ in any museum that wishes to document and exhibit significant features of recent university medicine. But whereas X-ray technology is relatively easily understood in terms of ‘modern medicine’ and does not create any problems for medical museum curators, the PET scanner poses at least two museological problems.
    One problem is that the PET scanner defies traditional museological display strategies. The directly visible and tangible ‘objects’ — the enclosing cabinet and the bed which the patient is placed on during the scanning procedure — are not at all important for the functionality of the scanner. The working material parts are either invisible and non-tangible (the isotope molecules) or non-intelligible (the detector and the computer hardware) and in addition do not make much sense without the resulting screen image. The ‘image’ in turn is indeed visible as long as the machine runs, but it is not tangible; it is the ephemeral result of the handling of signal data by the ‘text’ (that is, the computer programme code). The other problem (and this is why I have placed the words ‘object’, ‘image’ and ‘text’ between inverted commas) is that the PET scanner blurs the traditional categories of ‘object’, ‘image’ and ‘text’. How shall this artefact be classified? Does it belong among the physical museum objects? Or is it better placed (as an image) in the iconographical collection? Or even (as program code) in the archive?
    My last example of how recent biomedicine is a challenge to university museums is the advent of molecular therapy. Traditionally, pharmacology is based on trial-and-error experience. The administered drug may not even be chemically characterized (as in folk herbal medicine) and physicians usually have no knowledge of the biochemical mechanism behind the effect; it just happens to work. Now, however, the biochemical mechanism that mediates between the active substance and the physiological response is being elucidated in a growing number of cases. A good example of molecular therapy is AstraZeneca’s Losec®, the world’s best-selling drug against ulcer and heart-burn in the 1990s. Earlier, ulcer patients were often treated with surgery; today they are given antibiotics against the Heliobacter infection and Losec to lower stomach acidity (often in the form of combination therapy).
    The active substance in Losec is a synthetic molecule, omeprazol that specifically blocks the proton pump and hence acid production in the stomach. In other words, the omeprazol molecules work as a kind of specific biochemical microsurgery. It is thus a smart medical technology (and a major source of income for AstraZeneca) — but it is hardly a best-seller for medical museums. True, the Losec pill is tangible, but it looks very much like all other pills. The trillions of ‘molecular knives’ (omeprazol molecules) are intangible and invisible. The ion channels in the gastric lining are tangible on the microscopic level, but not visible to the naked eye. Furthermore, the most interesting ‘object’ is neither the pill nor the molecule, but the international network of scientists, medical doctors, advertising firms, and financial analysts who made a business success out of the omeprazol molecule. One could, of course, put the pill on a piece of black cloth under a spotlight and play a recorded deep voice telling the visitor that it gave AstraZeneca a 8 billion dollar revenue in the year 2000 only. But such stories are probably better told in books and magazines than in exhibitions. Likewise, the molecular and biological mechanisms of omeprazol may be better told in book pages and computer screens than in museums.
    Microarray systems, PET scanners, and molecular therapies exemplify the problems involved in collecting and exhibiting recent biomedicine. Consequently I believe that medical museums today are caught in a paradox. On the one hand, biomedical research and technology fills more and more of our lives. On the other hand, the whole idea of what constitutes a medical museum collection and what is displayable in a medical museum exhibition is open to question, because medical diagnostics and treatment has become less visible and less sensuous. The biomedical ideas and artefacts of the last decades are very different from those presently gathered and displayed in museums. They are smaller (often microscopic), more abstract and mediated, less tangible (if not altogether intangible), and generally much less emotionally evocative than traditional ‘modern medical’ objects. And sometimes they are not even material artefacts in the classical sense, but ‘boundary artefacts’, that is simultaneously ‘material objects’, ‘texts’ and ‘images’, depending on the context of interpretation.
    There may come a point when it becomes impossible to display such objects in a museum exhibition in any meaningful way. After all, who would come to the local university museum on a Sunday afternoon to read computer manuals, look at anonymous instrument plastic cabinets discretely labelled Perkin-Elmer or Hewlett-Packard, or watch video screens that represent repetitive patterns of DNA hybridization reactions? Will not those who are curious about the emergence of recent biomedicine and its impact on the world rather download the molecular images on their own computer or read about the global biomedical economy on a webpage or in a book or a magazine article instead? It makes sense to visit the local university museum to see lithoclasts, amputation saws, and siamese twins in jars? But why at all visit a museum if one wants to watch displays which elicudate the basic textbook principles of a PET scanner, a gene microarray or a ‘molecular knife’?
    I believe this is a genuine museological problem and one that all museums with medical collections and exhibitions will have to solve in the near future — unless they want to restrict their activities to the safe realm of ‘modern medicine’. I am not pretending that the Medical Museion in Copenhagen has a solution in sight or even a smart way of circumventing it. But we are presently working on explicating and conceptualizing the problem, and with some help from our colleagues in the university museum world we will hopefully together be able to find solutions in the future.