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Tag: "behavior" at biology news

Researchers reveal mystery of bacterial magnetism

...tion allowed us to directly observe differences in behavior between magnetic and non-magnetic versions of the same bacterium," adds Professor Bruce Applegate. Professor Applegate directed the genetic engineering at Purdue, with the assistance of Professor Lazlo Csonka, Dr. Lynda Perry, and Ms. Kathleen O'Conn...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

...econd. That is about the same rate as the sniffing behavior of comparably sized land mammals, like rats and mi...nd that they also exhibit this underwater sniffing behavior and can use it to follow underwater scent trails. "Now, the question is, 'What other semi-aquatic ...

Sunflower speciation highlights roles for transposable elements in evolution

...famous by Barbara McClintock in her study of their behavior in maize, are related to infectious retroviruses and are capable of multiplying and inserting themselves at different points throughout a host genome. They are found in virtually all eukaryotic genomes. The new findings not only add an interestin...

Study offers window into human behavior, brain disease

...tion, because the disease erodes aspects of social behavior and emotions ?self awareness, moral reasoning and ...have these new neurons that are involved in social behavior that are selectively vulnerable in the second major degenerative disorder." Notably, VENs are loc...

Honey bee genome holds clues to social behavior

...ser to understanding the molecular basis of social behavior in humans. "The honey bee (Apis millifera) has be...want to learn how the honey bee society influences behavior in individual honey bees," said Sinha, who is lead author of a paper that will be posted online this...

Detecting explosives with honeybees

... danger for civilians worldwide. By studying bee behavior and testing and improving on technologies already on the market, Los Alamos scientists developed methods to harness the honey bee's exceptional olfactory sense where the bees' natural reaction to nectar, a proboscis extension reflex (sticking out the...

A human taste for rarity spells disaster for endangered species

...ical study in PLoS Biology shows that adding human behavior to the equation--specifically, the human penchant for rarity--reveals an unexpected mechanism of exploitation, with alarming implications for species survival. Franck Courchamp, Elena Angulo, and their colleagues incorporated the assumption that rar...

Smoking changes brain chemistry

...g conditioned reinforcement, craving and relapsing behavior in addiction," said study co-author Christian G. Schütz, M.D., M.P.H., from the Department of Psychiatry at the University of Bonn. "Lower NAA levels have been implicated as indicators of neuronal or axonal dysfunction." Reduced NAA levels have be...

Pure carbon nanotubes pass first in vivo test

...ans. In another, they are tracking the longer-term behavior and effects of nanotubes in research lab animals. "This research grew out of Smalley’s vision, and he followed our progress and offered daily guidance, even from his hospital bed at M.D. Anderson," Cherukuri said. “Up to his very last day, he was ...

Protein shown to rally biological clock

...’s biological clock to coordinate daily rhythms in behavior and physiology. The finding clarifies the roles that both VIP and a neurotransmitter GABA play in synchronizing biological clocks, and sheds light on how mammals, in this case mice and rats. regulate circadian rhythm. Results were published in th...

UCSD study reveals how plants respond to elevated carbon dioxide

... it will be possible to thoughtfully predict plant behavior based on molecular mechanisms. "These molecular mechanisms are like fundamental parts of machinery," explained Young. "It's hard to predict what an instrument will do, if you don't even know anything about the parts that it is made from. Identify a...

Finding the right mix: A biomaterial blend library

... develop rapid, inexpensive methods to predict the behavior in the body of any of thousands of possible tyrosine-derived blends. ...

Eat less, weigh more? Enzyme makes lean mice 'susceptible' to dietary fat

...chers concluded, CPT1c must play a role in feeding behavior and appetite control. And when fed a high-fat diet (mouse chow laced with lard) for 10 weeks, mice lacking CPT1c still ate less than their normal littermates, but they were much heavier. What scientists already know about the regulation of body w...

MIT engineers probe spiders' polymer art

...tiny drops of silk solution-to test the material's behavior when subjected to forces. The team tested the thick solution's viscosity, or how it flowed, by "shearing" it, or placing it between two rapidly moving glass plates. They tested its stickiness by pulling it apart, like taffy, between two metal plates....

New study finds similarities between monkey business and human business

...ble gains. "Our results suggest that loss-averse behavior is a very general feature of economic choice," explain the authors. "Given our capuchins' inexperience with trade and gambles, these results suggest that loss-aversion extends beyond humans, and may be innate rather than learned." ...

Study challenges myth that sex late in pregnancy hastens birth

...udy does not address specific components of sexual behavior that might have varying effects on the onset of labor. ...

The secret lives of sea slugs

... field study of this charismatic orange creature's behavior in the wild, which was just published in the April... drag when they encounter strong water currents, a behavior that helps them avoid being swept away. At field sites near Vargas Island, British Columbia, and i...

Stomach receptor for H. pylori discovered

...s an immune response and alters the morphology and behavior of the epithelial cells due to injection of bacterial proteins into the cells. This interaction can lead to peptic ulcer disease, gastric adenocarcinoma, and non-Hodgkins lymphoma of the stomach. "Ulcers are a breach in the gastric or duodenal ...

Fly's courtship sheds light on the formation of innate behaviors

...ions that perturb the stereotypical male courtship behavior of the fruit fly Drosophila melanogaster. The male... the researchers showed that the male fly's sexual behavior is not a closed neural circuit, but rather a series of independent but interlinked steps that are re...

Evolutionary forces explain why women live longer than men

...ething. In nature, it means riskier physiology and behavior for the males, such as putting more resources into...here most dueling is a form of entertainment, male behavior and physiology is shortening their lifespans relative to women, Kruger said. In fact, modern lifesty...

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