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Tag: "swings" at biology news

Scientists find hormone activity explains adolescent mood swings

...ing hormones" of puberty are known to produce mood swings and stress for most teenagers, making it difficult to cope with this period of life. Until now, the specific causes of pubertal anxiety have not been identified, making it harder to understand and treat adolescent angst. In the current edition of t...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

...ng NTP reaches the addition site, the trigger loop swings from its usual position some distance away until i...ugar, phosphate and location when the trigger loop swings into position,?Kornberg said. “If it is misaligned even slightly, that set of contacts cannot occur....

New mechanism explains glucose effect on wakefulness

...tness needed for seeking food. That same machinery swings the other way after a hearty meal, as exemplified by the long and honored custom of the siesta. However, scientists have understood little about how the basic energy molecule, glucose, regulates such wakefulness and other energy-related behaviors. N...

Marine 'dead zone' off Oregon is spreading

...nificant role in these events. "We're seeing wild swings from year to year in the timing and duration of winds favorable for upwelling," said Jack Barth, an oceanographer with PISCO and the OSU College of Oceanic and Atmospheric Sciences. "This change from normal seasonal patterns and the increased variabi...

Bacteria beat the heat

...onditions. This may protect the cells from harmful swings in enzyme activity. We can envision using this knowledge, for instance, to facilitate enzymatic reactions in different applications, enhance crop production in areas subject to extreme temperature changes or create new resources for biofuel productio...

Seeing the forest and the trees

...sure of "biological insurance" that prevents large swings in carbon sequestration or any other service a healthy forest provides such as soil stability or fruit production that might arise from a single extinction scenario. "In general, we found that when you have more species, things are more predictable,...

Africa to take it on chin again with climate change

...aleoclimate records show that even greater climate swings have occurred in Africa's monsoons, most likely related to past variations in solar output and in Earth's orbit. "From a paleoclimate perspective, the recent African dryings appear to be neither unusual nor extreme," says Hurrell. Monsoon rains, cri...

Leprosy microbes lead scientists to immune discovery

...s, equipped for the two roles. The innate response swings into action when invading microbes are detected by molecules called Toll-like receptors (TLRs) that stick out of the cell's outer membrane, serving as a trip-wire to raise the alarm. The TLRs spur the monocytes to differentiate into the two rapid res...

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