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Tag: "varies" at biology news

Spousal illness can trigger partner death

...contribute to that partner's death. This risk also varies with the ill spouse's diagnosis. The study appears in the Feb. 16 New England Journal of Medicine. "Our study shows that people are connected in such a fashion that the health of one person is related to the health of another," reports Nicholas Chris...

Diverse tropical forests defy metabolic ecology models

...model to include light as a limiting resource that varies with tree size, the predictions could be improved. The necessary light data were available from only one site, and, in that case, observed growth and mortality patterns were consistent with predictions. Similarly, tree size distributions corresponded...

Of mice, men, trees and the global carbon cycle

...between plants and animals in how their metabolism varies with size. The larger an animal, the slower its metabolism on a per-weight basis. Thus, although an elephant burns many more calories per hour than a mouse, the mouse has a much higher rate per pound of body weight. An elephant with the same rate per...

New methods offer insight into regulatory DNA

...nd their distance from the genes they control also varies among genes. New tools are needed in the search of our genome for the sequences that contribute to disease, tools that will harness the massive amounts of DNA information and transform them into information of real biomedical utility. The methods d...

The bioweapon is in the post

...ate their customers. But the scope of these checks varies widely. But email addresses are notoriously easy to fake. And even orders from legitimate institutions may not be what they seem. Alfred Lasher, who manages Picoscript in Houston, Texas, says that he turned down one orderplaced by an individual at a ...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...w years. "China's nitrogen dioxide concentration varies according to season," Burrows adds. "There is more in the winter as a result of differing emission patterns and meteorology. For example more fuel is burned for heating and nitrogen dioxide persists longer in the atmosphere at that less sunny time of...

New genetic test can detect clam disease

...ons that become deadly, and whether that threshold varies among clam strains. Smolowitz uses traditional microscopic examination of tissues to determine if clams are sick. Gast's genetic test can now also be used to ensure clams without visible symptoms are not carrying the disease. With the disease spre...

The earliest animals had human-like genes

...olecules. The number of introns in genes, however, varies greatly among animals. While humans have many introns in their genes, common animal models such as flies have fewer. From an evolutionary perspective, it was long assumed that the simpler fly genes would be more ancient. The current study reveals the...

Beach pollution is worst during new and full moon

... Southern California suggests that water pollution varies with the lunar cycle, reaching the highest levels when tides are ebbing during the new and full moon. The findings could help beachgoers and managers better assess the potential risk of swimming. The report appears in the Aug. 1 issue of the America...

Purdue researchers find key to rice blast fungus

..., according to the USDA. Resistance in rice plants varies in different regions due to climate variation and in strains of the pathogen. Xu said that an important area of his future research will be to learn the interaction among several signaling pathways in rice blast fungus that allows the pathogen to co...

'Patient-choice' C-section rate rises 36%: HealthGrades study

...finds that the rate of "patient-choice" C-sections varies widely from state to state. Arizona had the smallest increase, with 15.7 percent, while Nevada had the largest increase of 56.7 percent. As in past HealthGrades studies, Florida, New York and New Jersey had the highest rates of "patient-choice" C-sec...

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

...e is genetic input, since the timing of maturation varies between families and cultures. But molecular mechanisms are presently unknown. Our study addresses this question using fruit flies, which have many of their genes in common with us and which are ideal for studying genetics." Thummel says the human e...

Scientists find a maturity gene in fly

...e is genetic input, since the timing of maturation varies between families and cultures. But molecular mechanisms are presently unknown. Our study addresses this question using fruit flies, which have many of their genes in common with us and which are ideal for studying genetics." Thummel says the human e...

UCSD discovery may provide novel method to generate medically useful proteins

...complicated loop structure. The size of the loops varies in addition to the amino acid building blocks that constitute the antibody protein. Although this mechanism can generate more than 100 trillion different antibodies, the researchers say replicating it in a test tube would be very challenging because...

A novel method to measure circadian cycles

... that the genetics of the circadian clock likewise varies between individuals. Unlike an individual's true rhythm, a fibroblast cell culture's rhythm does not vary with changes in light exposure or sleep habits. The researchers point out that their method can expose differences in circadian rhythms; it do...

Looks matter to female barn swallows

...rom their throats to their bellies, and this color varies among birds from very pale red-brown to a dark rusty-red. Like many songbirds, half of all male barn swallows typically care for at least one young chick that was actually fathered by another bird. The researchers used this widespread phenomenon of c...

Divergent life history shapes gene expression in brains of salmon

...oportion of sneakers in various salmon populations varies wildly; it appears that males that grow fastest early in life go on to become sneakers. The study by Aubin-Horth and her colleagues differed from most examinations of divergent life histories, in any vertebrate species, in that it combined the use o...

Assessing the Amazon River's sensitivity to deforestation

Understanding how the Amazon River varies in time, what causes those variations, and how sensitive it will be to ongoing, and accelerating, deforestation is a focus of study for scientists at the Woods Hole Research Center. Population and development pressures in the last several decades hav...

Researchers reveal secrets of flying snakes

...sts of South and Southeast Asia. Their temperament varies from species to species, and from individual to individual, but all five species of flying snakes are in the Colubridae family and officially are classified as harmless. Flying snakes secrete mild venom that is only dangerous to their small prey. Th...

A probe, not an echo

...e through -- the loss is called "attenuation," and varies according to the type of tissue, and the frequency of the pulse. "Typically the resulting images represent minute variations in relative attenuation over various frequency bands and they define the different sections of the tissue in the image," sai...

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