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Tag: "sometimes" at biology news

Costly breeding programs for endangered species pay off

...at Rice University bolster the case for costly and sometimes troublesome breeding programs that preserve maximum genetic variability in small populations of endangered species. Worldwide, zoos spend millions of dollars each year transporting rare animals thousands of miles in order to breed them with their mo...

Color perception is not in the eye of the beholder: It's in the brain

...the cones that detect red, green, and yellow--were sometimes profusely scattered throughout the retina, and sometimes barely evident. The discrepancy was more than a 40:1 ratio, yet all the volunteers were apparently s...

Discarded placentas deliver researchers promising cells similar to embryonic stem cells

...lls in the event they may someday be needed, as is sometimes done now with umbilical cord blood," commented Dr. Strom. The amnion is derived from the embryo and forms as early as eight days after fertilization, when the fate of cells has yet to be determined, and serves to protect the developing fetus. Accord...

Women feel more pain than men, research shows

...ifferent ways and that, compared to men, women can sometimes report more intensive pain and nausea." Another study has shown that interdisciplinary approaches to pain management may have different effects on women than men. Working with the Royal National Hospital for Rheumatic Diseases in Bath, researchers ...

Hurricane aftermath: Infectious disease threats from common, not exotic, diseases

...aters. Short bouts of diarrhea and upset stomachs sometimes occur after natural disasters and can be caused sewage contamination of the water. Although at high levels in floodwaters, the E. coli found in New Orleans is the type commonly associated with fecal contamination and is not the E. coli H7:O157 strai...

Controlling wildlife trade key to preventing health crises, study says

...n commonly benign microbes these animals carry are sometimes transmitted to other species, including humans, in the process. Domestic animals and wild scavengers in market places and villages also consume the waste and remnants of infected trade animals providing further opportunity for cross-species transmiss...

Drugs from the deep blue

...proteins; others include elements such as bromine, sometimes bonded into improbable structures. "It's a rich, ...me fish "taste" food items before swallowing them, sometimes spitting the item out and sucking it back in several times before rejecting or eating it. Some could...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

... abnormally small and die as they enter adulthood, sometimes when their heads fail to emerge from their bodies....in this amazing transformation into smelly, hairy, sometimes surly, sexually mature teenagers," he adds. "How is this event timed, and how is it controlled at a ...

Scientists find a maturity gene in fly

... abnormally small and die as they enter adulthood, sometimes when their heads fail to emerge from their bodies....in this amazing transformation into smelly, hairy, sometimes surly, sexually mature teenagers," he adds. "How is this event timed, and how is it controlled at a ...

Acid water in East Java threatens biodiversity and local welfare

...sed for agricultural and household purposes, which sometimes leads to the rice harvests failing. The very high aluminium content of the water - associated with the acidity - also plays an important role in this. Other elements such as fluorine, in the form of fluoride, form a direct threat for public health. T...

Infectious disease expert warns of spread of Rocky Mountain spotted fever

...s accompanied by headache and a sudden high fever, sometimes as high as 105 degrees Fahrenheit (or 40.5 degrees Celsius). Symptoms may also include sore throat and nausea. The spotty rash, which occurs in at least 85 percent of patients, does not appear until later in the infection and resembles a pinpoint pat...

Single gene is genetic switch for fly sexual behavior

...ical structures like eyes or limbs, by influencing sometimes hundreds of other genes, Dickson notes. "I don't see any good reason why innate behaviors, which are a consequence of how the nervous system is built, should be any different. Indeed, I think that is what our work shows," he says. In a second Cell ...

Scientists create digital bacteria to forge advances in biomedical research

...1976," Emonet said. They may even reveal why cells sometimes act as individuals and sometimes as part of a community. AgentCell was made possible by agent-based software, which researchers deve...

Stressed cells spark DNA repair missteps and speed evolution

...rate increased in bacteria stressed by starvation, sometimes resulting in a rare change that benefited the bacteria, it was controversial. In a report in the current issue of the journal Molecular Cell, she and her colleagues describe not only how it happens but also show that this only occurs at a special ti...

Researchers discover how tumor suppressor gene works

...keeps cells from growing rapidly, a condition that sometimes leads to tumor formation. Working with mouse epidermis and cultured human melanoma and nonmelanoma cancer cells, the team found that p16 inactivates key enzymes -- called JNK 1 and JNK 2 -- in the process. The enzymes are normally activated by exposu...

Unweaving amyloid fibers to solve prion puzzles

...mitations, illuminating the configuration of these sometimes pernicious molecules. And even though this work wa..., the same prion from the same yeast species could sometimes fold differently, and this fold would form its own cascade of interactions. In this altered form, th...

Once given 'no respect,' cells' tiny RNAS take driver's seat

...with their ability to be read to make proteins and sometimes leads to the RNAs' destruction. "Now we're figuring out the functions of these Myc-controlled microRNAs, other genes they regulate, and how else they might be involved in Myc-mediated initiation of cancer," says O'Donnell, who conducted her graduate...

Several minute intermediate stage in virus-cell fusion discovered; opportunity for drug development

... that the entire HIV fusion sequence is very slow, sometimes taking several hours," said Melikyan. "It is not inconceivable that it, too, has an intermediate step that lasts several minutes, giving us an adequate time window for drug action." ...

Simple sea sponge helps scientists understand tissue rejection

...eject each other--a process that approximates what sometimes happens in human transplants--the scientists have observed that cells known as gray cells migrate to and amass at the graft site, a clear suggestion that they are involved in non-self tissue recognition and rejection. Researchers believe that gray ce...

Why do aneurysms form? New studies suggest leading role for white blood cells

...stopped. AAAs can go undetected for years; experts sometimes refer to them as a "ticking time bomb" inside a patient's abdomen. In fact, an estimated 10 percent of all men over the age of 70 may have intact aortic aneurysms, which cause few symptoms except for occasional back pain or abdominal discomfort. If ...

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