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Tag: "physiological" at biology news

Rising ocean temperatures, pollution have oysters in hot water

...ine to intensify the stress placed on the oyster's physiological system. In future experiments, the researchers will try to determine whether the combination of temperature and pollution is preventing oysters from obtaining enough oxygen or whether it is interfering with the animal's ability to use the oxygen i...

Some butterflies travel farther, reproduce faster

Researchers have uncovered physiological differences among female Glanville fritillary butt...ward W. Fescemyer. The new study found significant physiological differences that may account for the more adventuresome behavior of certain of the females. The wo...

Jefferson scientists find high glucose before surgery raises risk of dangerous complications

...e also would like to explore some of the potential physiological mechanisms related to increased blood glucose and blood clotting. ...

Bitter taste identifies poisons in foods

...tes, a class of compounds with potentially harmful physiological actions, in natural foods. "The findings show t...ggies are a double-edged sword, depending upon the physiological context of the individual eating them. Most people in industrialized cultures can and should enjoy ...

Researchers find docking sites for glucocorticoid receptor and Hsp90

...of diseases," Darimont said. "They have a bunch of physiological activities and functions, and responses are very different depending on the cells involved. The treatments are extremely effective, and glucocorticoids have been used in huge amounts in the last 40 years. Unfortunately, they are associated with very ...

Too mellow for our predatory world

...viour because little is known about the underlying physiological mechanisms that control behaviour such as flight. ...new predators is not limited by constraints in the physiological system but by narrow behaviour. "Long-lasting escape flights entail a loss of strength for the anima...

Circadian gene helps the brain predict mealtime

...eal is a potent time-giving cue that can reset the physiological timing of most organs, including the liver. In ter...s lack of food anticipation at both behavioral and physiological levels is specifically associated with a mutation in the Period 2 gene, a gene that previous work ha...

New neurons could act to alleviate epilepsy

...orn into an epileptic environment, compared to the physiological running environment, showed reduced excitatory con...esearchers. "Our study demonstrates that both a physiological stimulus and an insult to the adult brain trigger the formation of new dentate granule cells, which ...

A giant among minnows: Giant danio can keep growing

...o raise and maintain. But the fish is too tiny for physiological research. So the researchers were interested in fi...ing a close zebrafish relative to allow them to do physiological research while drawing on the knowledge base of the zebrafish genome. The researchers saw the gian...

Detecting explosives with honeybees

...expression, the team sought to isolate genetic and physiological differences between those bees with good olfaction and those without. They also determined how well bees could detect explosives in the presence of potentially interfering agents, such as lotions, motor oil, or insect repellant. In addition, the tea...

What animals can tell us about hemorrhage, organ transplants and aging

...estion "How do they do that?" They uncover general physiological principles that may apply to humans, and may spur ...sm for their work and maintain a wonderment of the physiological adaptations in the animal world. Science writers can meet and interview many of these scientists a...

Scientists identify 36 genes, 100 neuropeptides in honey bee brains

...to link molecular information to neurochemical and physiological data, we first must know the identities of the peptides used in the brain and the genes they are encoded by," Sweedler said. Using a combination of the newly available honey bee genome sequence, as well as bioinformatics and mass spectrometry, Swee...

Melatonin improves mood in winter depression

... Lab set out to test the hypothesis that circadian physiological rhythms become misaligned with the sleep/wake cycle during the short days of winter, causing some people to become depressed. Usually these rhythms track to the later dawn in winter, resulting in a circadian phase delay with respect to sleep similar ...

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

..., scientists have noted a number of behavioral and physiological differences in disease progression between animals from the two countries, and the Indian-origin macaques are generally preferred in research on certain diseases. The new study was spearheaded by Kyes, a primatologist and head of the UW's Division o...

New mechanism explains glucose effect on wakefulness

...ween normal meals has never been tested, the daily physiological relevance of their glucose sensing is also unknown.... "Together, these results identify an unexpected physiological role for the recently characterized [tandem pore potassium] channels and shed light on the long-elus...

Just like us, social stress prompts hamsters to overeat, gain weight

...ponse under stress and helps kick off a cascade of physiological responses. "There are a whole suite of physiological responses that occur as a result of stress," Bartness said. It will take time to unravel all these p...

Female birds boost up their eggs when hearing sexy song

...stimuli alone were sufficient to elicit a profound physiological change. This study further highlights the importance of behavioural stimuli for reproductive physiology. Bathroom Pavarottis beware. ...

Researchers to develop ultra-miniature implantable sensors to measure blood flow

...usively implanted in patients who require constant physiological monitoring. Transonic Systems already produces miniature devices for measuring blood flow in physiology and pharmacology studies. According to Transonic project engineer Bruce McKee, "Dr. Kan's technology could create even smaller patient monitoring...

Researcher gives hard thoughts on soft inheritance

...n the womb influences your phenotype ?physical and physiological attributes." Another study showed that early grooming and nurturing of rat pups by rat moms affects methylation of a glucocorticoid receptor gene in the hippocampus in the brain. If the pups get lots of nurturing the glucocorticoid gene ge...

UCSD researchers develop 'smart petri dish'

...r to provide an early indication of the particular physiological or pharmacological conditions that need more in-depth study." "Although we performed these experiments on rat cells, this technology can be easily extended to human cells," says Sangeeta Bhatia, a professor of bioengineering at UCSD now at MIT, who ...

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