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Tag: "peak" at biology news

Volcanic eruptions, ancient global warming linked

...ing the ash layers deposited toward the end of the peak of the volcanic eruptions. Using chemical fingerpr...d about 300,000 years before the ash layer, at the peak of volcanic activity in east Greenland. The scientists speculate that massive release of greenhou...

New measure of sexual arousal found for both men and women

...rences between genders in the time needed to reach peak temperature. "Using thermography, we also found that women's subjective experience of sexual arousal corresponded with their physiological genital response; this challenges the common notion that women don't know their bodies," says Tuuli Kukkonen,...

Hay fever can send work productivity down the drain

...hat workers missed an hour of work per week during peak hay fever season. While missing an hour of work...the year-long study, most hours were missed during peak hay fever seasons ?namely spring and fall. In reality, this may result in missing a couple to severa...

New test for most virulent HPV strains under study

...en under 30 are another matter. Ages 15 to 25 are peak sexual activity years and peak years for HPV infection, says Dr. Ferris. Fortunately, the vast majority of the infections are clear...

Study shows hope for early diagnosis of Alzheimer's

...mentia, particularly Alzheimer’s, may exhibit that peak much later than 300 milliseconds, show a much weaker peak or have no peak at all, according to Polikar. Kounios said the P300 signal is generated by areas of ...

When your brain talks, your muscles don't always listen

...xerted just before you begin the upturn toward one peak and then it eases off again in the downturn toward a valley," Knight noted. Once recordings were completed at one site in the muscle, the electrode was repositioned to sample from other motor units within the muscle. Knight and graduate student...

Gut research yields new anti-cancer approach

...993, Taxol had annual sales of $1.6 billion at its peak in 2000. Unfortunately, Taxol and other standard, anti-tubulin drugs failed in colorectal cancer clinical trials. Gut tumor cells have evolved to include "efflux" proteins that recognize standard chemotherapies as foreign, and "pump them out" of t...

Rapid response was crucial to containing the 1918 flu pandemic

...days after the first local cases were recorded cut peak weekly death rates by up to half compared with cit... number of interventions applied and the resulting peak death rate seen. Perhaps more importantly, both studies showed that while interventions effectively ...

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

...ic tissues. Within 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 t...

Premature births may be linked to seasonal levels of pesticides and nitrates in surface water

...meeting, Dr Winchester reported that birth defects peak in Indiana and in the United States as a whole during April through July, the same months as pesticides and nitrates reach their maximum concentrations in surface water. This year's presentation expands upon that work. "A growing body of evidenc...

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