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Tag: "shorter" at biology news

Bumble bees can estimate time intervals

... sophisticated ability to estimate the duration of shorter time intervals had previously been known only in humans and other vertebrates. The findings are reported by Michael Boisvert and David Sherry of the University of Western Ontario and appear in the August 22nd issue of the journal Current Biology, ...

Sleep deprivation doubles risks of obesity in both children and adults

...ts. For both groups Professor Cappuccio found that shorter sleep duration is associated with almost a two-fold increased risk of being obese. The research also suggests that those who sleep less have a greater increase in body mass index and waist circumference over time and a greater chance of becoming ob...

Pitt phage hunter takes on tuberculosis

...rugs that would allow TB to be treated over a much shorter period of time," he added. "Shortening the treatment would lead not only to more effective and simple control of the disease, but also would cut down on the development of drug-resistant organisms." ...

Patients to benefit from novel technology revolutionizing high-speed molecular imaging

...ew technologically advanced D-SPECT camera enables shorter image acquisition times, provides better image qua...mera technology enables acquisition times that are shorter by an order of magnitude (2 minutes vs. today's 20 minutes for a cardiac scan), better image quality...

Important gene controlling tree growth and development found

...measuring the length of the day. When the days get shorter the trees "know" that it is time to stop growing a...to display a "critical daylength". If the days get shorter than this critical daylength the tree responds with growth cessation and bud set. The further north ...

Worm links cancer risk to ageing

...checkpoint proteins may set a genetic course for a shorter life but one that is free from cancer." Dr Dale Bredesen, Chief Executive and Scientific Director at the Buck Institute, added: "This work brings a new richness and sophistication to the way we think about longevity interventions. "If we're smart a...

What animals can tell us about hemorrhage, organ transplants and aging

...heory, the higher the species' metabolic rate, the shorter its life span should be because ROS are generated during aerobic metabolism as we use oxygen. But birds, which have a very high metabolic rate, live much longer than most similar-sized mammals with a lower metabolic rate. A study of birds, bats and r...

Ocean temperature predicts spread of marine species

...re at the ocean surface means larvae will travel a shorter distance in warm seas, the effect is more severe w... only 46 miles at 59 degrees. "On the up side, shorter dispersal can mean greater survival because the larvae spend less time in the water, where they are ...

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

... Pretoria tested whether foraging competition with shorter herbivores could explain why giraffes feed mostly on leaves high in trees, despite being able to feed at lower levels as well. "This [study] provides the first real experimental evidence that the long neck of the giraffe might have evolved as a con...

New biochip helps study living cells, may speed drug development

...would allow researchers to generate more data in a shorter time, thus speeding up the whole process of evaluating potential drugs and their different effects on ion channels. Ion channels are particularly important in muscle and nerve cells, where they facilitate communication and the transfer of electri...

Fruit fly aggression studies have relevance to humans, animals

...t to fight over. And, like people, some flies have shorter tempers than others. Researchers in the North Carolina Sate University genetics department have identified a suite of genes that affect aggression in the fruit fly Drosophila melanogaster, pointing to new mechanisms that could contribute to abnorma...

Adolescent but not adult hamsters are more aggressive on low dose of fluoxetine

...erally more peaceful, attacking less often and for shorter times. However, the juveniles responded differently, both to high and low doses. The low doses actually resulted in significantly longer, more frequent and intense attacks, whereas the high dose only partly inhibited aggression. Neither set of juv...

Abnormal overexpression of p53 is a predictive molecular biomarker

...itional therapies, as well as lower survival and a shorter time to disease progression." "Selecting those who have the best chance of responding to p53 tumor suppressor gene therapy also helps perfect clinical trial testing," Licato said. The researchers specifically found, in a subset of patients from pha...

Pressured by predators, lizards see rapid shift in natural selection

... single generation, favoring first longer and then shorter hind legs. The findings, by Jonathan B. Losos of ...jected that natural selection would begin to favor shorter limbs, which are better suited to navigating narrow branches and twigs. Their hypothesis was born...

Amateur boxing linked to brain cell injury

...so damage their nervous systems, but because their shorter bouts allow fewer blows to the head and because they must wear safety equipment, the effects tend to be less severe. These studies have been based on assessment of thinking, learning, memory and other brain functions long after boxing, rather than a...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...han an hour. However, they usually take dives much shorter than their maximum capacity, and only occasionally perform very long dives. By limiting dive duration, seals maintain aerobic metabolism, avoid lactate buildup that occurs in the face of insufficient oxygen and require little time to recover, Folkow ...

Longer-lived rodents have lower levels of thyroid hormone

...theory that the faster an animal's metabolism, the shorter its life, and vice versa, said Mario Pinto, the st... to have lower thyroid hormone concentrations than shorter living strains," the authors wrote. "Significant declines in thyroid hormone correlate well with enh...

GlycoFi and Dartmouth report full humanization of yeast glycosylation pathway in Science

...ty of producing higher recombinant protein titers, shorter fermentation times, and the ability to grow in chemically defined media, without risk of viral contamination from animal-derived ingredients. "Switching to this technology will also provide improvements in product uniformity and overall production ...

Cities change the songs of birds

...ctions and territory defense, the urban songs were shorter and sung faster than the forest songs. The urban songs also showed an upshift in frequency that is consistent with the need to compete with low-frequency environmental noise, such as traffic noise. Anthropogenic Impact on Signals Used by Wild Bir...

German researchers develop first non-invasive test to measure skin aging

...frared light to stimulate tissues to emit light at shorter wavelengths -- blue in the case of collagen, and green in the case of elastin. Since the upper layer of the skin, called the epidermis, is virtually transparent to infrared light, the infrared laser can reach the dermis with intense pulses of light ...

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