Tag: "shift" at biology news

Antarctic ice shelf retreats happened before

...seen in recent years. The retreat coincided with a shift in ocean currents that occurred after a long perio...timated. This is some of the first evidence that a shift in ocean currents can actually destroy ice shelves. In this case it's possible that a preceding warm...

Timing is everything: First step in protein building revealed

...They had expected -- or at least hoped -- to see a shift in the colorof light once the RNA was mixed in. Instead, they saw two shifts in thecolor given off. First, there was a slight shift, indicating a smallchange in the distance between eIF1 and its relative, and then a muchlarger shift, indicating a muc...

New Study from Affymetrix Laboratories Points to Changing View of How Genome Works

... Tiling Arrays: Affymetrix "tiling" arrays mark a shift in the way microarrays are designed and interpreted. By using a neutral approach to array design, tiling arrays include all non-repetitive sequence from a given genome, not just the hand-selected regions that were previously thought to be important. ...

Affymetrix and the Karolinska Institutet Announce Translational Medicine Strategic Alliance

... Institutet. "To improve human health, we need to shift the healthcare paradigm from diagnosing and treating existing diseases, to being able to predicting disease susceptibility and an individual's response to drugs," said Patrick Kelly, European Site Manager and Vice President, Affymetrix. "This is what...

Family trees of ancient bacteria reveal evolutionary moves

...laciations, and the fossil record reflects a major shift in the number of organisms metabolizing sulfur and a major shift in carbon cycling. "The question is: Why?" said Blank. "My contribution is the attempt to find evol...

New lab technique identifies high levels of pathogens in therapy pool

...s has fallen in recent years, in part because of a shift in the nation's priorities toward bio-weapons research that diverts valuable money and resources away from very basic and important issues." Higher winter levels of airborne pathogens in such enclosed pool areas are likely due to seasonal ventilatio...

Small species back-up giant marsupial climate change extinction claim

...of Darling Downs megafauna was caused by a massive shift in climate rather than by the arrival of humans who over hunted animals or destroyed habitats by burning the landscape. The findings, which were unearthed with the help of amateur fossil hunter, Ian Sobbe, are of particular significance because the ...

Youth With HIV Take More Risks After New Meds Introduced

...re low, she adds. Although some studies suggest a shift toward risky behavior in adults in the post-HAART era, (see http://www.cfah.org/hbns/newsrelease/safe_sex11-01-01.cfm), Lightfoot and colleagues are among the first to examine whether HIV-positive youth are taking more risks as well. To find out, th...

Africa to take it on chin again with climate change

...Monsoon rains, critical to life in much of Africa, shift north and south with the seasons. They normally reach the Sahel from July to September and the southern part of the continent from February into April. Low-pressure centers moving west from the Sahel during the monsoon often serve as seed for tropica...

After a time-shift, mixed signals from the circadian clock

...posed to a six-hour delay of the light schedule, a shift that mimics a transition from the eastern U.S. to ...phases of activity in the ventral and dorsal clock shift with different speeds. During a schedule shift corresponding to a transition from the U.S. to wester...

The circadian clock: Understanding nature's timepiece

...ne shifts their schedule, we want to find a way to shift their body with them so they remain alert, working optimally and making the right decisions." Antle also hopes to experiment further with a technique that involves resetting the circadian clock by altering serotonin levels, the same neurotransmitter...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...n ecosystem that is perturbed into an irreversible shift (e.g., by overfishing) may never be the same afterwards. Finding linear dynamics in the physics and nonlinear dynamics in the biology in part reconciles an ongoing debate between some physical and biological oceanographers on the nature of long-term...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

...the most likely cause for the female decline was a shift in the sex ratio of young raised by radio-collared females. This result has implications for conservation research, especially for monitoring water vole populations." Skewed sex ratios have been reported in stressed and malnourished females of vario...

Researchers Identify Cause of Early Bird Sleep Disorder

...d. It's not yet clear how the mutant gene works to shift people's sleep time, their circadian rhythm, he added. But follow-on experiments in fruit flies and mice yielded results that are intriguing. When the mutant gene was inserted into the flies, for example, it did the opposite of what was seen in the ...

Cancer related gene p53 not regulated as indicated by previous tissue culture research

...how they are regulated." "This study caused a big shift in how we think about p53," explains Salk scientist and first author Kurt Krummel. "You have to look at all interacting partners because after all, modifications of p53 itself might not be so important as modifications of negative regulators and co-a...

Scientists discover global pattern of big fish diversity in open oceans

... and protected. We know that there has been a big shift already ?we are replacing big tuna and billfish with things like snake mackerel and pelagic stingrays. This is a fundamental change in the world's oceans." To understand what creates these patterns of diversity, the scientists collaborated with ocea...

Scripps research scientists identify infertility molecule

...n world, the last few decades have seen a dramatic shift in when women are choosing to have their first children. According to the U.S. Centers for Disease Control and Prevention, the average age of first-time mothers increased from about 21.4 in 1970 to nearly 25 in 2000. Many women wait until they are w...

Neandertal femur suggests competition with hyenas and a shift in landscape use

...ndertal. It shows in the shape of the femur that a shift to greater mobility had already begun prior to the transition to the Upper Paleolithic, prior to any appearance of modern humans in Europe. In addition, the cave was a hyena den at about the same time that the humans lived in it, the authors say. Ar...

Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals

...ow normal migratory orientation, with the seasonal shift between southerly directions in autumn and northerly directions in spring. Tests under specific magnetic conditions clearly showed that this orientation involved the inclination compass and suggested that it is based on the type of "chemical compass"...

What comes first…the chicken, the egg, or the bad attitude?

...(parents of chickens raised for meat) are happy to shift their nutrients from the growth of their bodies to egg production, but some of them don't do it very willingly. It is not a conscious thing the bird does, but it does express a tendency of that bird to either be generous or to be selfish with its nut...

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