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Tag: "decline" at biology news

Blood test may help signal tumor's remission, return in throat cancer patients

...an, found that throat cancer patients who showed a decline in several cancer-related proteins following chemotherapy and radiation treatment were more likely to remain in remission, while those who experienced a large rise over time in those proteins frequently exhibited a return of throat cancer. The findin...

Pesticides choke pathway for nature to produce nitrogen for crops

...c nitrogen fertilizer added and also a significant decline in overall symbiotic nitrogen fixation. The most common explanation for the observations is an overuse of agrichemicals applied to legume crops. That practice sets up "a vicious cycle," Fox said, because it reduces a legume crop's natural need for...

Alzheimer's disease to quadruple worldwide by 2050

...tage disease symptoms. However, nearly all of that decline would be attributable to decreases in those needing costly late-stage disease treatment in 2050. The largest increase in the prevalence of Alzheimer’s will occur in Asia, where 48 percent of the world’s Alzheimer’s cases currently reside. The numb...

The mouflons of the Kerguelen archipelago

...homogeneous, and that this genetic diversity would decline over time. Instead, we observed the opposite.” The effect of natural selection diversity to be attributable to genetic mutation, and the Islands are much too isolated to have undergone migrations. “This variety can be explained by elimination,...

Smoking rate has plummeted in New York City

... rate was nearly 20% lower than the 2002 rate -- a decline that represents 240,000 fewer smokers. The City’s ...ew Yorkers have made the most progress, with a 30% decline in the smoking rates, though Asian males still smoke at a rate of 16.4% Smoking rates on Staten...

Amphibians in losing race with environmental change

...gh many climatic regimes - the massive, worldwide decline of amphibians can best be understood by their inab...ading one species after another of amphibians into decline or outright extinction, say researchers from Oregon State University, in a study published today in ...

Climate change impacts stream life

...e abundance of macroinvertebrates in streams could decline by as much as 21 per cent for every 1 degree Celsius rise in temperature. Dr Durance added "The numbers of species in the streams we examined might also fall by 12-25 per cent if trends continue as expected over the next 50 years". ...

Healthy coral reefs hit hard by warmer temperatures

...to the global loss of reef-building corals and the decline of other important species dependent on reefs," said lead study author John Bruno at UNC. "We've long suspected climate change is driving disease outbreaks. Our results suggest that warmer temperatures are increasing the severity of disease in the oc...

Research says boiling broccoli ruins its anti-cancer properties

...en they were shredded finely which showed a marked decline of glucosinolate levels with a loss of up to 75% over 6 hours after shredding. Professor Thornalley said: "If you want to get the maximum benefit from your five portions-a-day vegetable consumption, if you are cooking your vegetables boiling is ou...

The quest for an effective HIV vaccine presents new possibilities, challenges

...thin weeks of exposure, virus levels peak and then decline to levels that may remain low for months or years. It is believed that CD8+ T cells--so-called killer T-cells--are responsible for this reduction in HIV levels; however, their ability to continue to suppress the virus declines over time as the virus ...

DNA analysis suggests under-reported kills of threatened whales

... under-reporting whale mortality is not simply the decline of the species and their ability to sustain their populations ?it is the increasing difficulty the situation creates for protecting these animals." ...

Sleep quantity affects morning testosterone levels in older men

The testosterone levels of healthy men decline as they get older. As sleep quality and quantity typically decrease with age, objectively measured differences in the amount of sleep a healthy older man gets can affect his level of testosterone in the morning, according to a study published in the...

New report: Explosive growth changes salmon industry

...an wild fishery has plummeted, as indicated by the decline in the value of annual Alaska salmon catches from ...in the late 1980's to less than $300 million. The decline in value of wild salmon catches has had wide-ranging economic and social effects on wild salmon fish...

Pitt study notes decline in male births in the US and Japan

...n of fetuses that die are male. They note that the decline in births is equivalent to 135,000 fewer white mal...e explanation for these trends. “The pattern of decline in the ratio of male to female births remains largely unexplained,?said Devra Lee Davis, Ph.D., M.P....

Power-boosting signal in muscle declines with age

...d exercise. In every case, older rats showed a decline in AMPK activity compared to younger animals. Young rats infused with a stimulatory chemical showed an increase in muscular AMPK activity not seen in old rats, they found. Similarly, the muscle of exercise-trained young rats showed more than a doubli...

Cambodian vulture nests offer hope for species

...ct has already been successful in helping stem the decline in Asia's vultures in Cambodia through a combination of scientific research, direct protection, food supplementation and awareness-raising. Satellite-collaring of animals has lead to a greater understanding of which areas are important to the two mos...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...iga, from both before and after the recent extreme decline in saiga numbers ?yet the results of both datasets... has become vital since saiga have seen a dramatic decline in numbers of over 95% in recent years, making them one of the most critically endangered species o...

Metacognition: Faced with a test, rats can check their knowledge first

...nation task was, the more frequently rats opted to decline the test. And second, accuracy in the test decline...f the time-discrimination task increased, and this decline in accuracy was greater when rats were not given the choice of declining the test—that is, when they...

Woman's Day and For Womens of Science

...eshwater and coastal ecosystems can be expected to decline with reduced mercury inputs; however, the rate of decline is expected to vary among water bodies, depending on the characteristics of a particular ecosystem. ...

Mercury contamination of fish warrants worldwide public warning

...eshwater and coastal ecosystems can be expected to decline with reduced mercury inputs; however, the rate of decline is expected to vary among water bodies, depending on the characteristics of a particular ecosystem. ...

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