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Tag: "general" at biology news

DNA to the defense

...une response. This finding challenges scientists' general view of how a chromosome is functionally organized. An article describing the research will appear online this week in the journal Genome Research . African sleeping sickness, or trypanosomiasis, is caused by a protozoan parasite known as Trypan...

Evolutionary forces explain why women live longer than men

...apart from most women. "Because mortality rates in general are going down, behavioral causes of death are ever more prevalent," Kruger said. Looking at human mortality rates sliced by socioeconomic status shows that the gender gap is affected by social standing. Human males in lower socio-economic levels t...

Increased sensitivity to nerve signals keeps diabetes at bay

...ore, drugs that directly stimulate M3 receptors in general would likely come with problematic side effects--for example, causing smooth muscles to contract. One of three branches of the involuntary nervous system, the parasympathetic, or "rest and digest" system fulfills many roles--slowing the heart rate, ...

A rice future for Asia

...d other careers," says Robert S. Zeigler, director general of the Philippines-based International Rice Research Institute (IRRI). IRRI, together with the Thai Rice Foundation under Royal Patronage (TRF) and Philippine Rice Research Institute (PhilRice), is hosting ten Thai teenagers and nine young Filipinos ...

Newborn screening can cause unnecessary parental stress

... error. "We're not sure why ?maybe it feeds into a general nervousness as new parents," she speculates. "But our results also show that parental stress was greater when families didn't have adequate information and understanding." Two-thirds of parents with false-positive results did not correctly understan...

New study reveals structure of E. coli multidrug transporter protein

... of this transporter will add significantly to our general understanding of the mechanism of drug transport t...rD internal cavity are likely to contribute to the general mechanism transporting various compounds through the cell membrane, and may play "an important role ...

Researchers discover how bacteria sense their environments

...ound in bacterial receptors may in fact point to a general mechanism for cellular signaling and serve as inspiration for developing molecular devices. Such devices could be used to sense a wide range of chemicals, light, ionic strength (salt), pH and heavy metals with great sensitivity, gain and dynamic rang...

Electric fish in Africa could be example of evolution in action

...ike eye color in humans, that violates the fishes' general evolutionary pattern but doesn't give rise to separate species," said Arnegard, who will return to Gabon in June to conduct further tests, funded by the National Geographic Society. ...

Free radical cell death switch identified

...nd lipids. A lifetime of oxidative stress leads to general cellular deterioration associated with aging and degenerative diseases. How the oxidative-stress signals trigger these profound effects in cells has remained unclear. But Bonni and his research team, including Maria Lehtinen, a graduate student in ...

New study finds similarities between monkey business and human business

...esults 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." ...

A splice of the action: Translational role for WT1 isoform

...ntaining mRNA. Dr. Hammarskjold explains that "the general impact of this study is that it highlights the links that exist between transcription and post-transcriptional gene regulation and the importance of alternative splicing. We hope that these results will stimulate further studies to identify genes tha...

How nature tinkers with the cellular clock

...ral regulation also raises the question in how far general conclusions about regulatory systems can be drawn from studying simple model organisms like yeast or fruit flies. ...

Tests for 'face-blindness' reveal disorder may not be so rare

...g of 1,600 individuals found that 2 percent of the general public may have face-blindness and a German group has recently made a similar estimate. It's conceivable that millions of people may have symptoms consistent with prosopagnosia, without even realizing it." Tests developed by Nakayama and colleagues...

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

...may be representative of Nepali rhesus macaques in general given the past history of the area and the geographic barrier of the Himalayan Mountains that separates Nepal and India from China. To facilitate the use of rhesus macaques in research while ensuring the conservation of Nepal's naturally occurring r...

Beauty and the brain

...ive content," Winkielman says, and would "get at a general principle of cognition" ?Winkielman and his colleagues first "prepared" participants' brains to perceive a prototype and then asked them to categorize different degrees of variations around that same prototype and rate their appeal. "As predicted,...

New finding points way to foiling anthrax's tricks

...ests that producing more than one siderophore is a general strategy of bad as well as benign bacteria, according to the researchers. To date, however, only the pathogenic forms of E. coli and Bacillus have been found to produce a siderophore not bound by siderocalin; the non-pathogenic forms that produce mor...

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

...r the question "How do they do that?" They uncover general physiological principles that may apply to humans, and may spur future medical advances to benefit people. These scientists exude an enthusiasm for their work and maintain a wonderment of the physiological adaptations in the animal world. Science w...

Cougar predation key to ecosystem health

The general disappearance of cougars from a portion of Zion National Park in the past 70 years has allowed deer populations to dramatically increase, leading to severe ecological damage, loss of cottonwood trees, eroding streambanks, and declining biodiversity. ...

Stormy days ahead for coral reefs

...hers say. "Coral reef experts have long had a general sense of which coral shapes are more vulnerable during storms than others," says the study's lead author, Dr. Madin, who now works at the National Centre for Ecological Analysis and Synthesis (NCEAS) in California, USA. "However, to really predict ho...

A simple feedback resistor switch keeps latent HIV from awakening

...cumstances, acts as a "feedback resistor," and its general features, the authors suggest, are likely to be found in other systems that must rapidly alternate between two states while resisting noise in the environment. Their model may also provide an explanation for some puzzling observations about Tat and H...

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