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Tag: "expands" at biology news

Hearts of male and female rainbow trout are different

...s. Summary and Conclusions This study expands upon previous findings that sex differences in cardiac performance and metabolism exist in fish in general, and have now been found to occur in rainbow trout in particular. Moreover, the differences are only realized during working conditions and inv...

Premature births may be linked to seasonal levels of pesticides and nitrates in surface water

...rations in surface water. This year's presentation expands upon that work. "A growing body of evidence suggests that the consequence of prenatal exposure to pesticides and nitrates as well as to other environmental contaminants is detrimental to many outcomes of pregnancy. As a neonatologist, I am seein...

Male reindeer inflate a large air sac in the neck region to emit their hoarse rutting calls

...ead kept low. In this posture the inflated air sac expands the neck region. Both acoustic and optical display serve to deter rival males and thereby prevent fighting, allowing to conserve energy. Simultaneously, the performance serves to attract female mating partners. Males vocalize almost exclusively du...

Breakthrough vaccine to treat chemo-resistant ovarian cancer

... plans to launch a new cancer vaccine therapy that expands treatment options for thousands of women with advanced stage ovarian cancer. This innovative treatment will be offered by Cancer Treatment Centers of America and developed by AVAX Technologies, Inc. (OTCMarket: AVXT.OB). "Cancer Treatment Centers o...

Scientists unveil piece of HIV protein that may be key to AIDS vaccine development

...nter starts with a highly focused contact and then expands to a broader surface that stabilizes the interaction. "The first contact is like a cautious handshake, which then becomes a hearty bear hug," says Gary Nabel, M.D., Ph.D., director of NIAID's VRC and co-author of the new paper. An effective HI...

E. coli bacteria migrating between humans, chimps in Ugandan park

... than like humans living in the village. "This expands our notion of the situations in which people and chimps can exchange microbes," Goldberg said. "Habitat overlap, even without direct contact between people and primates, is sufficient for the exchange to occur." The further finding that humans had...

How fish mend a broken heart

...pmental genes switch on, Poss said. The epicardium expands to rapidly cover the wounded heart muscle. A subset of those epicardial cells then alters their identity, invading the wound and providing essential new blood vessels to the growing muscle. They further found that the two-part regeneration proces...

Single molecular 'mark' seen as pivotal for genome compaction in spores and sperm

...lopment. A "Perspectives" review in the same issue expands on the significance of the findings. "This molecular mark is required at a critical time leading up to genome compaction in spores and sperm," says Shelley L. Berger, Ph.D., the Hilary Koprowski Professor at The Wistar Institute and senior author o...

PNAS study reveals why organs fail following massive trauma

...us presented by the innate system, that lymphocyte expands into army of clones specifically designed to attack the invader at hand. Unfortunately, lymphocytes too are capable of mistakenly destroying human cells. Thus, they have developed quality control mechanisms where they can choose to stop expanding int...

Dragonfly's metabolic disease provides clues about human obesity

...n at www.pnas.org on 21 November. The discovery expands the known taxonomic breadth of metabolic disease and suggests that the study of microbes found in human intestines may provide a greater understanding of the root causes of human metabolic dysfunction. James Marden, professor of biology and an ins...

Microcapsules like it hot and salty

...ll that they repel each other. The whole structure expands considerably, the diameter increases and the wall ...en the two states of quite different capsule sizes expands the range of possible uses for the Potsdam microcapsules enormously. As well as being used as medici...

Bubbles go high-tech to fight tumors

...balloon. After the shell pops, the perfluorocarbon expands into a gas bubble that is approximately 125 times larger in volume than the droplet. "If a bubble remained spherical its diameter would be much larger than that of the vessel," Bull said. "So it deforms into a long sausage-shaped bubble that lodges...

Viagra improves high altitude exercise performance up to 45% for some

...issue of the Journal of Applied Physiology. Drug expands the blood vessels Sildenafil citrate is best known as Viagra, a drug used to treat erectile dysfunction. The drug was originally developed to relieve high blood pressure. It causes blood vessels in certain tissues, such as the lungs, to relax. This ...

Report lists top 20 most-vulnerable African carnivores

...y abolish the ability of telomerase to work." This expands the possibilities for drug design, he said. "Instead of an active site inhibitor, you could screen for a TEN domain inhibitor." ...

Groovy protein essential for promoting cancer development

...y abolish the ability of telomerase to work." This expands the possibilities for drug design, he said. "Instead of an active site inhibitor, you could screen for a TEN domain inhibitor." ...

Bioengineers create stable networks of blood vessels

...nnect with larger blood vessel structures. "This expands our understanding of the neuro-vascular niche and opens up ways to address repair of severed nerves," said Joseph Madri professor of pathology at Yale School of Medicine and a co-author. "We can now study what affects the attraction and repulsion of ...

University of Arizona plant scientists to unravel maize genome

...c information. The grant further strengthens and expands Arizona's leading position in genomics research, which is considered a key ingredient in building a leading-edge bioindustry. Genomics - the analysis of an organism's complete set of genes - provides the basis for the improvement of crops, developmen...

Genetic defenders protect crops from fungal disease

...h its specific target remains unknown. The study expands on the researchers' previous work with a gene called PEN1. As its name suggests, PEN1 and PEN2 seem to share a common purpose. However, they seem to act via different mechanisms, and PEN2 protects against a wider range of fungal pathogens. For exampl...

New NIAID grants strengthen national biodefense and emerging infectious diseases research network

...nd Prevention. The addition of these two new RCEs expands the network's scientific reach to cover some poorly understood diseases and new research needs. For example, researchers in the new centers have expertise in equine encephalitis and other viral diseases that can be transmitted to people by mosquitoes...

Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds

...-free area created by the ants, and the ant colony expands to occupy them. The devilry of M. schumanni today provides homes for ants in the future." Frederickson is conducting new field studies to determine which chemical cues the ants use to discriminate between host plants and other species. She also has ...

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