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Tag: "peaks" at biology news

Research finds that circadian rhythms dominate all life functions

...of all genes fall into the same phase or timing of peaks and valleys. Synchronization with the activity of the other genes and genes in different organs is a very important and highly specific part of gene function. In addition, genes can oscillate with different amplitude -- the swing between the highe...

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

...follow the outline of a sinusoidal curve, with its peaks and valleys, on a computer screen. "More force--which is indicated by a corresponding higher firing rate of neurons--is exerted just before you begin the upturn toward one peak and then it eases off again in the downturn toward a valley," Knight n...

Shedding new light on proteorhodopsin

... "Proteorhodopsin has an absorption spectrum that peaks in the green wavelengths, so the cells swam when they were exposed to green light, but stopped when they were exposed to red light." In the absence of the azide respiratory poison, green light had no effect on the flagellar motors of these proteor...

Bats prey on nocturnally migrating songbirds

... faeces of Spanish giant noctules, with occurrence peaks in the diet in spring and autumn, i.e. during main songbirds' seasonal migration. This contrasted strikingly with food composition of other European bat species which all feed exclusively on invertebrates! This finding brought about a heated cont...

New research shows that flu is a trigger of heart attacks

...art disease (IHD) (40.1% men and 59.9% women). The peaks in deaths from both AMI and IHD coincided with the times when influenza epidemics and acute respiratory disease (ARD), which often accompanies flu, were at their height. They found that the chances of dying from AMI increased by a third in epidemic w...

Scientists map key landmarks in human genome

.... On a graph, the data displayed as a series of peaks and troughs corresponding to positioned nucleosomes and nucleosome-free regions, respectively. Analysis revealed that promoters of genes that had similar expression status (they were all "off" or "on") had related nucleosome locations. The technique ...

RNA map provides first comprehensive understanding of alternative splicing

.... Unexpectedly, this search revealed four discrete peaks where the binding clusters locate. Furthermore, the location of the peaks correlated with Nova's action on regulating whether the alternative exon is spliced in or out. T...

Edge density key to controlling gypsy moth spread

Controlling population peaks on the edges of the gypsy moth range may help to slow their invasion into virgin territory, according to a team of researchers. "Slowing the spread of the gypsy moth is a priority in forest management in the U.S.," says Ottar Bjornstad, associate pr...

Immune system police learn early and sometimes badly

...toimmune disease. T cell schooling in the thymus peaks in the first six weeks of life in the mouse, which roughly translates to the first 15 years of human life. Those early lessons seem to last a lifetime and the few regulatory cells that develop later will be like the early cells, says Dr. Rafal Pachol...

Internal body clock dictates timing of different types of stroke

...of stroke. All three stroke types registered two peaks during the day, one between 6 and 8 in the morning... on the other hand, were more likely to have lower peaks in the morning and higher peaks in the afternoon than cerebral infarction. Around one in five case...

Protein 'nanosprings' most resilient found in nature

...ited a saw-tooth pattern of regularly spaced force peaks as individual repeats unraveled one by one, they said. After this complete unfolding of the protein, the researchers observed that ankyrin repeats were able to rapidly refold and that process of refolding generated significant force, they reported. ...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...leagues showed in their paper that these anomalous peaks can be explained by the presence in the ice of methanogens. Methanogens are common on Earth in places devoid of oxygen, such as in the rumens of cows, and could easily have been scraped up by ice flowing over the swampy subglacial soil and incorporat...

UIC developing drug for SARS

...RS patients indicate that replication of the virus peaks 10 days after the onset of fever," said Michael Johnson, director of the Center for Pharmaceutical Biotechnology in the UIC College of Pharmacy and the study's principal investigator. "By administering protease inhibitors early, when feverish symptom...

Fundamental discovery -- Bone fracture

...The amount of an individual's bone mineral density peaks around age 30, then decreases for the rest of his or her life. By the time the person becomes elderly, very serious bone loss may have occurred. "As if this weren't bad enough, it is also true that the materials properties of the bone decrease with ...

Engineers improve plastic's potential for use in implants by linking it to biological material

...ssed across the surface of a material to "map" its peaks and valleys. In this case, the surface was a layer of polypyrrole, and the resistance of the peptide-coated tip to being passed across the surface revealed how well T59 clung to the plastic. "They had a moderately strong interaction, which is useful...

Thai spice helps cut blood sugar swings

...on. This delay is good because it reduces the high peaks of glucose, which otherwise would require the body... its mechanism. He said that "if we can reduce the peaks and valleys of insulin with HCA, then it might have some application in diabetes, both in slowing pr...

Road salt affects mitigation wetlands

... hourly. "Salt levels in the runoff wetland reach peaks that are half as salty as sea water," Silver told ...e 2005 Joint Assembly in New Orleans. "We recorded peaks during the winter as high as 10 to 12 parts per thousand in the runoff wetland and 2.5 to 3 parts pe...

Signaling protein builds bigger, better bones in mice

... often unknown). The goal is to find a pattern of peaks that will distinguish between patients with cancer...hey reported finding a single pattern involving 18 peaks (or unidentified proteins) that could diagnose ovarian cancer across two of these data sets. The M....

Cracking the olfactory code in bees

... often unknown). The goal is to find a pattern of peaks that will distinguish between patients with cancer...hey reported finding a single pattern involving 18 peaks (or unidentified proteins) that could diagnose ovarian cancer across two of these data sets. The M....

New species from old data

... often unknown). The goal is to find a pattern of peaks that will distinguish between patients with cancer...hey reported finding a single pattern involving 18 peaks (or unidentified proteins) that could diagnose ovarian cancer across two of these data sets. The M....

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