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Tag: "harbor" at biology news

Threats to wild tigers growing

...ents. International cooperation among nations that harbor the animal will also be essential. Dinerstein and his coauthors conclude by recommending that these countries appoint "tiger ambassadors" to advocate for the species, step up efforts to prosecute poachers, and provide economic incentives to encourage...

Madagascan tropical forests return thanks to better management and well-defined ownership

...forests is a concern worldwide since these forests harbor more than 50 % of the terrestrial species richness in the world and have a large importance in global climate regulation. Estimates of tropical forest loss are still uncertain and a 50 % margin of error appears possible. However, scientists know even...

New host species for avian influenza identified

... the common gull, and dabbling ducks were found to harbor all but two known influenza virus subtypes. The ecological and epidemiological data provided on influenza A virus should assist both in assessing the risk of the virus spread by wild birds and with the design of new surveillance studies for high a...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...re" surveillance system for detecting intruders in harbor entrances. Their technique is designed for the sh...w-water (less than 20 meters deep) choke points of harbor entrances, which often have high levels of ambient noise. Peter J. Stein ( pstein@scisol.com ) of Ne...

NIDA study identifies genes that might help some people abstain from smoking

...o contribute to nicotine dependence.? Genes that harbor variants that contribute to both success in quitting smoking and in vulnerability to become dependent on multiple substances include cadherin 13 (a molecule involved in cell adhesion, which governs how cells recognize and connect to their neighbors) ...

Lighting up life: Cold Spring Harbor Protocols presents tips for creating glowing plants

...ented special challenges to GFP detection: plants harbor tough cell walls and enormous subcellular structures that interfere with visualization, and their natural green pigments can mask the luminescent qualities of GFP. The current issue of Cold Spring Harbor Protocols includes a freely available artic...

Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle

...these areas to the cortex. Reward circuit neurons harbor receptors for estrogen and progesterone. However, how these hormones influence reward circuit activity in humans has remained unclear. To pinpoint hormone effects on the reward circuit, Berman and colleagues scanned the brain activity of 13 wome...

Cold sore virus might play role in Alzheimer's disease

...uses cell damage, then retreating and seeking safe harbor within the body's nerves in a "latent" phase. The virus spends most of its time in the latent phase, sequestered in cells, not active and not replicating. But occasionally, when triggered by factors like stress, fatigue, certain foods, or even sunlig...

Why doesn't the immune system attack the small intestine?

...doesn't attack tissues in the small intestine that harbor millions of bacteria cells. In a study in the February issue of Nature Immunology, and which is currently available on the journal's Web site as an advanced online publication, investigators led by Shannon Turley, PhD, of Dana-Farber identify an unl...

Researchers discover new details about HIV-1 entry and infection

...e vagina of women infected with HIV-1 while LC may harbor viable virus for some time before spreading it to other cells. These results reveal that it is necessary to consider mechanisms of viral entry into both CD4+ T and LC when searching for an effective way to interfere with infection through the vagi...

Studies yield insight into the numerical brain

...parietal lobe, showing that this region appears to harbor neurons that process nonabstract numerical representations, in addition to neurons that code for abstract representations of numeric quantities. The researchers said that exploring how the processing of numerical symbols develops could have clinica...

Biologists produce global map of plant biodiversity

...r. "Tropical countries such as Ecuador or Colombia harbor by a factor 10 to 100 higher plant species richness than most parts of the United States or Europe. The question is, Why?" While explorers to these tropical regions long ago recognized this increased diversity over more temperate regions, the gene...

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

...nd 4.4 percent of the chimps studied were found to harbor at least one E. coli isolate that was clinically resistant to an antibiotic. Antibiotics are used frequently in human populations in this region of Uganda, Goldberg said, but antibiotics have never been used in local wildlife, so the antibiotic-resis...

How fish mend a broken heart

...The researchers found that the hearts of zebrafish harbor progenitor cells that spring into action to restor... produce the growth factor, while epicardial cells harbor receptors that are triggered by the signal. When the researchers experimentally blocked the Fgf sign...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...emains of large whales sunk to the ocean's depths, harbor yet another unique chemical community similar to that in vents and seeps. Some researchers suggest that whale falls were evolutionary "stepping stones," creating new environments for seep animals to evolve into a plethora of new species. But Kiel a...

Study illuminates how the plague bacteria causes disease

...hese bacteria, which belong to the genus Yersinia, harbor a protein that mimics an apparently unrelated mammalian enzyme. That copycat protein blocks host cells' capacity to change shape and move, abilities important for cells of the immune system to track down and "eat" foreign invaders, the researchers ex...

Critical hearing gene helps send auditory messages to brain

... ago that people with a recessive form of deafness harbor two abnormal copies of the otoferlin gene. They also had some evidence hinting that the gene might act as a calcium sensor with an important role in neurotransmitter release by the inner hair cells. For example, otoferlin resembles a calcium-sensing ...

Buildup of damaged DNA in cells drives aging

... mice that had been generated in the laboratory to harbor a defect in their XPF-ERCC1 enzyme and that had symptoms of rapidly accelerated aging to the genes expressed by normal mice of the same age. This comparison revealed a profound suppression of genes in several important metabolic pathways in the proge...

More than drought affecting wheat yields

...e Program grasses throughout the region also might harbor the wheat curl mite. "We don't have a good understanding of the wheat curl mite and its ecology," Rush said. "It holds on some grasses, but there's lots of work to be done to understand what happens with these mites during the summer." Right now, h...

Increased sensitivity to nerve signals keeps diabetes at bay

...of food. In contrast, mice genetically altered to harbor an excess number of beta cell M3 receptors show the opposite: a profound increase in glucose tolerance and insulin release, the researchers found. Moreover, such animals become resistant to developing symptoms of diabetes or prediabetes when fed a hi...

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