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Tag: "presents" at biology news

Mayo Clinic study suggests that a central nervous system viral infection can lead to memory deficits

...r this family of viruses to damage the human brain presents a very real medical problem, Dr. Howe says. In general, viruses that kill neurons in the hippocampus are not uncommon. For example infections caused by the herpes virus or human immunodeficiency virus (HIV) can lead to the loss of brain cells, but ...

Oldest animal fossils may have been bacteria

...This week, a study in the same prestigious journal presents evidence for reinterpreting the 600 million-year-old fossils from the Precambrian era as giant bacteria. The discovery "complicates our understanding of microfossils thought to be the oldest animals," said lead author Jake Bailey, a graduate studen...

New technology used to construct the first map of structural variation in the human genome

...vered 12% of the human genome." The other paper presents a new multi-step algorithm used with the Affymetrix GeneChip® Human Mapping 500K Early Access SNP arrays. The specificity of the algorithm, coupled with the increased probe density of these arrays, permitted the identification of approximately 1,000...

Highly concentrated botulinum preparation for cosmetic injections can result in severe illness

...m is a potentially fatal disease, which invariably presents with acute bilateral cranial neuropathies, regardless of exposure mechanism. Early recognition of botulism, treatment in an intensive care setting, provision of mechanical ventilation when indicated, and rapid administration of antitoxin (optimally w...

New book uses ABCs to teach children microbiology

...; we cannot live without them. The Invisible ABCs presents answers to questions that we all have an interest ...ist and professor at Ohio Northern University, who presents photos he has collected of microorganisms shaped like letters of the alphabet to illustrate the sign...

New HIV statistics indicate increasing toll of AIDS on African American community

...ions for Confronting the Epidemic in Black America presents five policy solutions that address the increasingly disproportionate impact HIV/AIDS is having on the African-American community: Eliminate marginalization of, and stigma and discrimination against, black gay and other men who have sex with...

Proteins necessary for brain development found to be critical for long-term memory

...of the National Academy of Sciences. "This study presents strong evidence that a molecular process fundamental during development is retained in the adult and recycled in the service of memory formation," said Thomas J. Carew, Donald Bren Professor and chair of UCI's Department of Neurobiology and Behavior....

Road-crossing in chimpanzees: A risky business

...ection with longstanding chimpanzee travel routes, presents a new situation that calls for flexibility of responses by chimpanzees to variations in perceived risk. Understanding how chimpanzees cross roads as a group would help shape our hypotheses about the emergence of hominoid social organization. Progr...

Cracking the egg

...A new paper in the journal Genes & Development presents significant new information about what is happening within a fully grown (pre-ovulatory) egg and some of the changes that occur during transition to the two-cell stage embryo. The researchers performed a large-scale survey of thousands of fragments...

NYU scientists identify how development of different species uses same genes with distinct features

...t diverged over 250 million years ago but one that presents many morphological similarities with flies in terms of development. The research team’s results showed that flies and wasps employ most of the same genes and similar interactions among these genes, but some events are changed to adjust to the deve...

Protein averts cell suicide but might contribute to cancer

...f Biological Chemistry. "Unrepaired DNA damage presents a big roadblock for the DNA replication machinery, which cannot go around it," says Zucai Suo, assistant professor of biochemistry. "This damage will trigger cell death because the DNA is not replicated. "This protein bypasses the damage and save...

Brain works more chaotically than previously thought

..., the dendritic arm of another neuron. The synapse presents an insurmountable barrier to the neuron's electrical pulses. The brain overcomes this obstruction by means of an amazing signal conversion: the synapse releases chemical messengers, known as neurotransmitters, which diffuse to the dendrites. There, t...

New science of metagenomics 'will transform modern microbiology'

...communities of microbes is studied simultaneously, presents the greatest opportunity -- perhaps since the invention of the microscope -- to revolutionize understanding of the microbial world, says a new report from the National Research Council. The report calls for a new Global Metagenomics Initiative to dr...

Engineering the heart piece by piece

...plications and hurdles that remain.? The paper presents a model for collaborative research between engineers, clinicians and biologists for successful cardiovascular tissue engineering research. “Although there remain tremendous technological challenges, we are now at a point where we can engineer fir...

Protein found to shield pancreatic cancer cells from self-destruction

...eting TG2, or its activating protein PKC, or both, presents a novel and potentially effective approach to treating patients with pancreatic cancer," Lopez-Berestein said. Research in the mouse model remains in the early stages, the researchers caution. The researchers also show that the TG2 pathway also is...

Scientists map key landmarks in human genome

.../journal/vaop/ncurrent/index.html . "This study presents the first global view of human nucleosome positioning," said Fisher. Although analyses of this type had been pioneered in simpler organisms such as yeast, those approaches were not feasible when applied to the massively larger and more complex human ...

Illuminating the dark side of plants

...an." Handbook of Poisonous and Injurious Plants presents clear information on hundreds of plants. It is lavishly illustrated, elegantly highlighting each plant's distinguishing characteristics. The images include 398 full-color photographs as well as color plates from the LuEsther T. Mertz Library of The...

Cancer-killing invention also harvests stem cells

...d vessels. During inflammation, the vascular wall presents surface selectins that adhere specifically to white blood cells. These selectins cause the white blood cells to roll slowly along the vascular wall, seeking signals that tell them to crawl out of the bloodstream. This is how white blood cells migra...

New study challenges 'critical period' in childhood vision development

...hood. The evidence gathered from this case study presents a scientific alternative to the widely noted "critical period" that the brain undergoes during childhood. The critical period theory asserts that the brain's learning mechanisms are significantly dependent on early sensory stimulation. Sinha and his...

Mercury contamination of fish warrants worldwide public warning

...e about the danger posed by mercury pollution. It presents 33 principal findings from five synthesis papers prepared by the world's leading mercury scientists and published in the same issue of Ambio. The declaration and supporting papers summarize what is currently known about the sources and movement of m...

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