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Tag: "behavior" at biology news

How trees manage water in arid environments

...ens in most coniferous forests, where the seasonal behavior of the trees is significantly influenced by temper...he trees essentially closed down," she said. "This behavior suggests that the trees have little ability to access any moisture present in bedrock fractures. Bec...

Bisexual fruit flies show new role for neurochemical

...t gene that really specifically affects homosexual behavior without affecting heterosexual behavior," he said. "Trying to understand fly bisexuality sounds silly, but these behavioral changes are important evidence that ambient extracellular glutamate and xCT transport proteins play important, unsuspected r...

A genetic 'gang of 4' drives spread of breast cancer

...ing of the genes for these four proteins and their behavior in metastasis led us to hypothesize that they might be cooperating with each other in a way that would give an advantage to cells in the primary tumor," said Massagué. "These same genes, we believed, might also be used for some related purpose in the...

Renegade RNA -- Clues to cancer and normal growth

... nucleotide building blocks that can control their behavior in a cell. Mendell hopes to take advantage of the ...roRNA elements that control other aspects of their behavior in cells. They also are curious to figure out what miR-29b is doing in the nucleus. Because microRN...

Genetic pathways to curable and incurable forms of pancreatic cancer identified

... total complement of mutations that determines the behavior of these cancers but also the sequence in which th...avel the detailed mechanisms behind their distinct behavior and hopefully identify points of vulnerability in the more fatal form to improve survival," Hingoran...

A rarity among arachnids, whip spiders have a sociable family life

..., and all mix in social groups. This is surprising behavior for these arachnids long-thought to be purely aggr...ocial, according to a Cornell researcher. Social behavior is extremely rare in arachnids, a class that includes spiders, amblypygids, scorpions and mites, amo...

Keeping the body in sync -- The stability of cellular clocks

...clical changes in physiology, gene expression, and behavior that run on a cycle of approximately one day, even in conditions of constant light or darkness. Peripheral organs in the body have their own cellular clocks that are reset on a daily basis by a central master clock in the brain. The operation of the ...

Scientists find method to pick noncompetitive animals, improve production

...n death. The energy that animals used for negative behavior or to avoid such activities is then transferred to production. "This selection methodology is a roadmap to improving the breeding of domesticated animals," Muir said. "The tool also could allow us to domesticate more species as readily available f...

New cell type identified in cancer development

...to further differentiate ?a strong contrast to the behavior of normal stem cells. "We thought this was an interesting development," says Gao, "because these precancerous cells were actually stopped from becoming malignant. We are calling this process ‘differentiation-induced cell death,?a protective mechan...

Protein overexpression at heart of heart failure

...bunit) that is responsible for the altered channel behavior in human heart failure. Similar changes of both beta-subunit expression and single-channel behavior were also observed in a mouse model of heart failure with cardiac overexpression of the human L-type...

Homing pigeons get their bearings from their beaks

... since it has been shown that many animals display behavior that is modified or controlled by the Earth’s magnetic field. The meaning of these minute iron oxide crystals goes farther than their amazing ability to help pigeons home. Research into how they work has caught the interest of nanotechnologists c...

Is there a pilot in the insect?

...t 70 years of often surprising observations of the behavior of winged insects. It accounts for the fact not on...e outset. These hidden forces underlying animal behavior can then be understood more exactly by permanently shuttling between biology and robotics. These pr...

Scripps research team discovers a chemical pathway that causes mice to overeat and gain weight

...n with these animals, so we started watching their behavior at night and during the day." During continuous monitoring of temperature and motor activity, the researchers realized that the mice without the EP3 receptors were more active during the light hours-the nocturnal mice's "night"-and, more important...

Prenatal cocaine's lasting cellular effects

... underlie the changes in neuronal architecture and behavior that Stanwood and others have previously observed. What remains to be determined, he cautioned, is whether D1 receptor localization is affected in humans exposed to cocaine prenatally. If found in humans, "it gives us a new way to think about...

Proteins important in Alzheimer's, Parkinson's disease travel in the slow lane

...nt followed by pauses. This intermittent transport behavior of individual cargoes made the overall population slow and suggests that fast and slow proteins use the same basic mechanisms for transport. Surprisingly, the videos also revealed that multiple slow proteins are transported together as "packets,"...

Racing neurons control whether we stop or go

...e brain. "I developed the race model to explain behavior on a task called the stop signal task with a frien...stop signal. "Applying the model to children’s behavior revealed that stop signal task times are significantly longer in children with attention deficit and...

Applied scientists create wrinkled 'skin' on polymers

...lth Sciences and Technology aimed at exploring the behavior of living cells on these patterned substrates. Such research may lead to the development of an effective and robust method to build custom templates for engineering and growing tissues. "We are approaching this field of research from various direct...

Napoleon's mysterious death unmasked, UT Southwestern researcher says

...e of their interest in the way disease affects the behavior of historical figures and, in turn, the course of history. In Napoleon's case, they were intrigued by a popular notion that Napoleon could have altered the balance of European power had he escaped his exile. An autopsy at the time cited stomach ca...

Birth rate, competition are major players in hominid extinctions

...and hyenas. " Can we, today, control our cultural behavior to ensure our environmental success," says Jablonski. "Can we control growth and population density, or come up with new technology to overcome the problems we will face from the global climate change we have created? "We clearly have the cultura...

Lead with a poisonous electron shield

...in why lead inhibits this enzyme. The different behavior of lead in these two enzymes demonstrates that it can enter into complexes in which the metal–ligand bonds can either point in all directions, or into only one hemisphere, while the other hemisphere is filled by the free electron pair. This observati...

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