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Tag: "influences" at biology news

Novel molecular 'signature' marks DNA of embryonic stem cells

...not been previously described, merges two opposing influences ?one that activates genes and another that represses them. When combined in this way, the negative influence seems to prevail and, as a result, the genes positioned near bivalent domains are silenced. However, the activating influence appears to keep...

When mice choose mates, experience counts

...ay in humans. But many have speculated that social influences do play a role in how we choose our friends and partners." ...

Nano machine switches between biological and silicon worlds

...rs. The Hall Effect describes how a magnetic field influences an electric current. That influence can be measured to a high degree of accuracy. These measurements link the biological motor with the electronic signals of the silicon world. The biological element of the device starts with a DNA molecule fixed t...

'Executive' monkeys influenced by other executives, not subordinates

...nalysis to figure out what hormonal and/or genetic influences determine who becomes the monkey or human equivale...control the eyes. And, we can explore whether such influences as hormonal levels, particularly testosterone, influence ranking. For example, we can manipulate tes...

Genetic and environmental influences on alcohol consumption among rhesus monkeys

...hesus monkeys to examine genetic and environmental influences on alcohol consumption. Results indicate that, just as with humans, both genetic and environmental factors contribute to variation in alcohol consumption among the non-human primates. "Rhesus macaques provide a good model for many human diseases d...

Feinstein researchers identify intelligence gene

...iers. "While our data suggests the dysbindin gene influences variation in human cognitive ability and intellige...model involving multiple genetic and environmental influences on intelligence," said Anil Malhotra, MD, principal investigator of the study. The specific role of...

Have a taste for fat? Yes! A sensor in the mouth promotes preference for fatty foods

...ow that lingual stimulation of CD36 by fatty acids influences behavioral and digestive physiology. CD36 gene inactivation fully abolishes both the spontaneous preference for fat and the changes in gastrointenstinal secretions mediated by oral delivery of lipids. These findings unveil one potential pathway medi...

Sooner is better with cochlear implants, Stanford scientist shows

...ed that their findings demonstrate just one of the influences that early cochlear implantation can have on children with hearing loss and it reinforces the importance of early detection and intervention for children with hearing loss. Children who need an implant would benefit from having it sooner rather than ...

New research examines genetics of successful aging

... not be surprising if the collection of genes that influences the capacity to reach old age with normal mental capacity differs somewhat for men and women." The results of the study also highlighted the detrimental effects of cigarette smoking and excessive drinking on successful aging in both sexes. "The fi...

Research: Snails were overlooked contributors to marsh destruction

...ientific tradition emphasizing only these types of influences resulted in overlooking "top down" ones ?in this case, top-down controls potentially spurred by climate change. "For ecology in general, the take-home lesson here is that increasing climatic extremes, such as drought stress, can trigger formation of...

WWF peeks into mysterious life of Borneo's pygmy elephants

...ellite tracking. It was proved that forest quality influences the diversity and distribution of elephant food in the forest, with encroachment into palm oil plantations being higher along the degraded forest-plantation areas. The Sabah Wildlife Department described the study as very important and the results ...

Wild Gorillas Handy with a Stick

...wo populations, supporting the notion that ecology influences the evolution of novel tool use. Though Mbeli Bai gorillas often use intact branches to help them get around, the authors explain, these are the first observations of wild gorillas using detached objects as tools. However the gorillas acquired their ...

'Perception' gene tracked humanity's evolution, scientists say

...e far more homogeneous. Exactly how prodynorphin influences human perception is unknown. Evidence for its various effects comes entirely from clinical studies of people who have mutations in the gene. Past clinical studies have also indicated a positive correlation between lower prodynorphin levels in the bra...

Past experience of pheromones induces dominant courtship behavior in fruit flies

...at it is about past experience of these flies that influences adult behavior. Clues caused the researchers to suspect that a key role was played by a chemical signal--a pheromone--carried by adult males during the early encounter. To prove this, the researches used mutant flies that lack the normal adult phero...

Scientists pinpoint inflammation gene

...BR scientists are beginning to study how this gene influences a variety of complex diseases, including cardiovascular disease, diabetes, obesity, preeclampsia, and various infectious diseases. Kissebah said it provides new insight into studies he leads on the genetics of obesity. "Now that we have identified S...

Cattle grazing may help rather than hurt endangered species

...airy shrimp and tiger salamanders. Cattle grazing influences the rates of evaporation which work together with climate to determine the depth and duration of wetland flooding. Cattle have been grazing in the land for roughly 150 years and have become a naturalized part of the ecosystem. "In practical terms, ...

Male elephants woo females with precise chemistry

...pheromone emitted by older male elephants in musth influences both a female elephant's interest in mating and how other surrounding elephants behave, a new study has found. The researchers at Oregon Health & Science University and the University of Auckland in New Zealand say the release of a specific pro...

Chemical compound inhibits tumor growth, size in new mouse study

...nked polyphenols present during roasting or baking influences the toasty aroma developed by oats and might be used to limit the generation of off-flavors in oat products. Polyphenols are a large family of naturally occurring plant components that have been associated with a wide variety of health benefits. Fl...

Toasty oat aroma influenced by presence of health-linked polyphenols

...nked polyphenols present during roasting or baking influences the toasty aroma developed by oats and might be used to limit the generation of off-flavors in oat products. Polyphenols are a large family of naturally occurring plant components that have been associated with a wide variety of health benefits. Fl...

Prenatal exposure to famine increases risk of schizophrenia

...s a neurodevelopmental disorder with environmental influences during early brain development modifying risk of schizophrenia. These influences, none of which are yet firmly established, include fetal nutritional deficiency. A previous study found that there was twice the risk of schizophrenia among children con...

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