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Tag: "greater" at biology news

Male chimpanzees prefer mating with old females

...y making young females more valuable as mates with greater reproductive potential. The findings, reported by Martin Muller of Boston University and colleagues at Harvard University, appear in the November 21st issue of Current Biology. Theoretical explanations for the preference of human males for young f...

Dragonfly's metabolic disease provides clues about human obesity

...f microbes found in human intestines may provide a greater understanding of the root causes of human metabolic dysfunction. James Marden, professor of biology and an insect physiologist at Penn State, and Ruud Schilder, who in August 2006 earned his doctorate in biology at Penn State and is now a postdoct...

More kidney cancer is detected and treated early, yet death rate rises

...though the rising incidence has been paralleled by greater use of surgery for kidney cancer, this trend has not led to fewer people dying. "With increased early detection and treatment of small tumors, we would expect to see a decrease in mortality associated with kidney cancer," says senior author Brent K...

Researchers examine why food tastes bad to chemotherapy recipients

...thresholds. If ingested at higher concentrations, greater than three milligrams per liter, iron and copper "may cause nausea, vomiting, diarrhea, kidney and liver damage," Dietrich explained. Some tests will be done with human volunteers to determine reactions of volatile compounds in the mouth. Since sal...

China's environmental challenges

...country's already fragile freshwater systems under greater strain. The authors wonder: will China "?.continue down the same road as in the past two decades, or will environmental quality, energy efficiency, and the conservation of resources no longer be sacrificed at the altar of economic development?" Aut...

History-hunting geneticists can still follow familiar trail

...carried that variation, just like there would be a greater diversity of T-shirts or shoes within a larger pop...d data on protein diversity in the same species. A greater variety of proteins indicates more diverse DNA, because DNA contains a species' blueprints for manuf...

Gene chip technology shows potential for identifying life-threatening blood infection

...r annually, and one-third of patients die - a toll greater than deaths from breast, colon, pancreas and prostate cancer combined. Currently, a diagnosis of sepsis or non-infectious systemic inflammation is made by sending cultures of patients' blood, sputum, or urine to the laboratory for analysis, which ...

Climate change has surprising effect on endangered naked carp

...ey changed from an organ which excreted water at a greater rate than salt in river-water, to one which conserved water relative to salt in lake-water," explain the researchers. Long-term lake-water-acclimated fish also adjust by actively feeding and have much larger fat stores, the researchers found. In c...

High levels of blindness in southern Sudan following years of war

...h is caused by an infection, was responsible for a greater proportion of the cases of blindness than has been found in studies in other parts of rural Africa. In a second survey in the same district, the researchers looked specifically for cases of trachoma, both in its early stages and later when it has ...

PLoS ONE is launched by the Public Library of Science

...nteractive and fully accessible process that gives greater value to what we do as scientists." PLoS ONE was first described to the research community back in June 2006, and the response to the proposal has been enthusiastic and sustained. Although PLoS ONE opened its doors to manuscript submissions only in...

Cancer stem cells linked to radiation resistance

...on resistance and eventually allow us to help even greater numbers of cancer patients." ...

Buildup of damaged DNA in cells drives aging

... influence the growth hormone pathway, there was a greater than 95 percent correlation in changes in gene expression between the DNA repair-deficient mice and old mice. And, remarkably, there was a near 90 percent correlation between all other pathways affected in the progeroid mice and the older mice. "...

Other patients bear the real cost of Herceptin

...tive and their estimated cost effectiveness is far greater than that currently expected for Herceptin. So they could fund Herceptin if they did not treat 355 patients receiving adjuvant treatment (16 of whom would be cured) or 208 patients receiving palliative chemotherapy, and if they found £500,000 from...

For super-obese patients, duodenal switch beats gastric bypass

...hers report that the duodenal switch (DS) produced greater weight loss than the Roux-en-Y gastric bypass (RYG...commended the duodenal switch for those with a BMI greater than 50," said study author Vivek Prachand, M.D., assistant professor of surgery at the University o...

Winning by a neck -- Giraffes avoid competing with shorter browsers

... The researchers built low fences around trees in greater Kruger National Park to stop smaller browsers from eating leaves. After a complete growing season they found that the number of leaves on the fenced trees was roughly the same, revealing that small browsers are responsible for most of the foraging. T...

Study suggests evolutionary link between diet, brain size in orangutans

...s well as in studies by other researchers, "we see greater anatomical differences amongst the Bornean populat...r male counterparts and that they generally are at greater risk for nutritional stress because of pregnancy and lactation and their smaller homes ranges. "Th...

Most widely used organic pesticide requires help to kill

... by human pathogens, the implications could be far greater in medicine than in agriculture," Handelsman says. ...

Ocean temperature predicts spread of marine species

...s. "On the up side, shorter dispersal can mean greater survival because the larvae spend less time in the water, where they are at a high risk of death. On the down side, it could mean they won't travel as far and may not make it to their juvenile habitat," O'Connor said. The researchers suspect tempe...

Bird flu vaccine additive may stretch supply

... a limited vaccine supply and allow vaccination of greater numbers of people. Neither group experienced serious reactions to the vaccines. However, mild pain or swelling was more common in the adjuvant group....

Steep oxygen decline halted first land colonization by Earth's sea creatures

...deliver oxygen. "An unshelled mollusk has a far greater respiratory problem than a shelled mollusk," Ward said. "In many groups the shell is an active part of the respiratory system." ...

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