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Tag: "shorter" at biology news

Osteoarthritis may be sign of faster 'biological ageing'

...ith chronological age. The older a person was, the shorter they were. But among the 160 people with hand os...eoarthritis, the telomere length was significantly shorter than among those without the disease, even after taking account of influential factors, such as obes...

Cells selectively absorb short nanotubes

...NA-wrapped single-walled carbon nanotubes (SWCNTs) shorter than about 200 nanometers readily enter into human lung cells and so may pose an increased risk to health, according to scientists at the National Institute of Standards and Technology (NIST). The results of their laboratory studies appear in an upco...

MIT device draws cells close -- but not too close -- together

...ected 80 micrometers as the gap setting because at shorter distances, cells sometimes migrate across the gap and end up touching. And at wider distances, some soluble signals drop off. Bhatia and Hui have used the new device to study liver cells. The two found that to get liver cells to express specific l...

Motor protein plays key role in connecting neurons

...evelopment, when the axon needs to stop growing, a shorter molecule, minus the motor, is expressed. "Probably after the neuron is developed, the major work of myosin is done. There are many cleavage sites in the middle and this typically large molecule can be cut down to a small molecule that actually inhibi...

Birth rate, competition are major players in hominid extinctions

...ronmental seasonality with longer cold seasons and shorter periods of warm weather. Leading up to and during the last glacial maximum about 18,000 years ago, the grassy plains disappeared, taking with them the animals that relied on large expanses of grass for grazing. These animals were the prime food sour...

No-scalpel vasectomies by skilled surgeons may speed recovery

... vas. Even so, the no-scalpel method resulted in a shorter operation. The patients also had a shorter recovery with a quicker resumption of postoperative sexual activity. The smaller trial included 1...

Finnish scientists discovered a new approach to treat virus-induced lymphomas

...ssive lymphomas with reported median survival time shorter than six months after diagnosis. Researchers at the University of Helsinki have discovered that activation of the p53 pathway offers a novel effective treatment modality for KSHV-infected lymphomas. The findings by the research group of Dr. Päivi Oj...

Paleontologists discover new mammal from Mesozoic Era

...elongated body form, in contrast to its relatively shorter and very primitive limb and foot structures. The new mammal also has lumbar ribs, a rare feature among modern mammals. "The discoveries of exquisitely preserved Mesozoic mammals from China have built the evidence such that biologists and paleontol...

Gene that makes people 'early to bed and early to rise' demystified

...vation of transcription earlier and resulting in a shorter period." The advance in understanding of PER2's role may ultimately lead to methods for people, such as nurses who must care for patients in the middle of the night, to synchronize their internal clocks with their regular or changing daily routines...

Keeping the body in sync -- The stability of cellular clocks

... don’t tick quite right. These families?clocks are shorter than 24 hours, and they also have mutations in oscillator-related genes. The current results shed light on how a genetically-linked phosphorylation event gone wrong could lead to inaccurate timing of our body clockworks. ...

'Marathon mice' elucidate little-known muscle type

...IB), better suited to rapid and sudden activity of shorter duration. The fiber types are defined by which "myosin heavy chains" (MHCs) they contain and by their metabolic capacity, a feature largely determined by the number of energy-producing mitochondria they house. Myosins are motor proteins that consist ...

Individual differences in a clock gene predict decline of performance during sleep deprivation

... longer gene variant and those possessing only the shorter one coped with being kept awake for two days, including the intervening night. The researchers found that although some participants struggled to stay awake, others experienced no problems with the task. The results were most pronounced during the...

Transfusion expert urges wider use of filtered blood

... antibiotics, reduced patient time in the ICU, and shorter lengths of hospital stays overall. One study, in fact, estimated that the savings in treating heart surgery complications alone could total $1 billion a year, nationwide. "Rarely do we come up with a medical advance that saves money and is better...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

... found the sick flies had fewer sleep sessions and shorter periods of continuous sleep than did healthy flies. They basically just didn't sleep well, concluded the researchers. The researchers can't say for sure say whether a disruption of the brain's central clock, which is the area of the fly brain that...

Exploring the dark matter of the genome

...y assemble themselves, but it's harder to know how shorter pieces with many repeating sequences, typical of heterochromatin, fit together." Thus the first "substantially complete" genome sequence of Drosophila, published in Science in March, 2000 by the Berkeley Drosophila Genome Project and Celera Genom...

Researchers shed light on shrinking of chromosomes

...preparing for division, and the chromosomes become shorter and shorter until they are about to separate and migrate towards the poles of the cell. “It is at this stage t...

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