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Tag: "length" at biology news

Survival of heart patients on beta-blockers varies greatly with genetic variation

...ations in the beta-2 gene significantly determined length of survival for ACS patients who were taking beta-blockers. For those patients not taking beta-blockers, variations in the beta-adrenergic receptor genes showed no evidence of effect on survival, although small sample size makes this result uncertain...

Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

...e exercise training was sufficient to 'double' the length of time that intense aerobic exercise could be maintained (ie. from 26 to 51 minutes). Although peak oxygen uptake was not increased, aerobic adaptations did occur within active skeletal muscle as reflected by a 38% increase in activity of the mitoch...

Can't serve an ace? Could be muscle fatigue

...t could also result in loss of control over stride length during running - leading to stretched hamstrings and other injuries. "When a tennis player is serving, they don't watch where their shoulders are, they rely on the brain's knowledge of how much effort is required to maintain the best position, to ge...

'Punctuated' evolution in the human genome

...A segments, or "duplicons," ranged from 4-77 Kb in length and exhibited 94-99% sequence identity to their euchromatic predecessors. The scientists then performed a comparative analysis of these duplicons in other primate species, including chimpanzee, gorilla, orangutan, baboon, and macaque. This analysis ...

Scientists find that protein controls aging by controlling insulin

...one of the mythical Greek fates who controlled the length of human life. Their previous studies have shown that mutant mice lacking the Klotho gene appear normal until about 3 to 4 weeks old, and then begin showing signs of age, such as skin atrophy, osteoporosis, arteriosclerosis and emphysema. The mice di...

Researchers feed tiny pills of RNA to planarians to identify genes essential for regeneration

... that a tissue fragment only 1/279th of the worm's length can grow into a new planarian. Researchers know that planarian stem cells, called neoblasts, play a central role in both regeneration and homeostasis. But how they do that has remained shrouded in mystery. Sánchez Alvarado and his research associate...

$6.5 Million Grant for Microarray Center at Yale School of Medicine

...gene and shown how it controls the arrangement and length of flower-bearing branches in corn, related cereal crops, and ornamental grasses. The study indicates that during the domestication of corn from its wild ancestor (teosinte), early farmers selected plants with special versions of the ramosa1 gene tha...

The genetic origins of corn on the cob

...gene and shown how it controls the arrangement and length of flower-bearing branches in corn, related cereal crops, and ornamental grasses. The study indicates that during the domestication of corn from its wild ancestor (teosinte), early farmers selected plants with special versions of the ramosa1 gene tha...

Researchers identify new genes that regulate aging

...erly, and inhibition of another gene increases the length of life by 20%. The genes discovered affect a wide variety of activities, including insulin signaling, metabolism, and dietary regulation. Genes involved in insulin signaling are particularly interesting because corresponding human genes could poten...

Field of beams - Novel system uses polarized light pulses to reveal crop health

...on management do not realistically account for the length of time that people harbor infections. The simplest models entirely ignore the latent period of a disease: the period of time when an individual is infected but not yet infectious. Other models often assume that the rate of progression from latent to...

Inhaling large amounts of salt can cause hypertension

...on management do not realistically account for the length of time that people harbor infections. The simplest models entirely ignore the latent period of a disease: the period of time when an individual is infected but not yet infectious. Other models often assume that the rate of progression from latent to...

Understanding biases in epidemic models important when making public health predictions

...on management do not realistically account for the length of time that people harbor infections. The simplest models entirely ignore the latent period of a disease: the period of time when an individual is infected but not yet infectious. Other models often assume that the rate of progression from latent to...

A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs

...rations, or how hard the clutch is shaken, but the length of and time between the movements that signal the embryos to hatch. Undisturbed, red-eyed tree frog eggs usually hatch six to eight days after fertilization, but can hatch up to 30 percent earlier if attacked by animals such as snakes or wasps. At ...

IMF Launches World’s First DNA Database for Myeloma Patients

...s -- ranging from less than 20 percent of the body length to more than 70% -- I am extending the results reported in the PNAS paper -- divergence of genital size within species -- to an investigation of diversification in genital size between species, inferring possible modes of speciation. Since variation ...

Certain fish have a special mating preference

...s -- ranging from less than 20 percent of the body length to more than 70% -- I am extending the results reported in the PNAS paper -- divergence of genital size within species -- to an investigation of diversification in genital size between species, inferring possible modes of speciation. Since variation ...

Program finds lost genes in nematode genome

...gans is able to use more accurate models of intron length than previous analyses. This is important for find...coding machinery of proteins. While getting intron length is helpful for gene annotation, the process is 15 times slower than the typical, less accurate metho...

Scientists discover global pattern of big fish diversity in open oceans

...ar in the open ocean ?baited lines up to 100 km in length that catch a wide range of predators. While they target tuna or billfish, they catch many other species too, including sharks, sea turtles and seabirds. To see whether findings based on the Japanese longline data could be applied to a wide range of s...

Team Invents Device For Weighing Individual Molecules

..."--essentially tiny tuning forks about a micron in length and a hundred or so nanometers wide that have a very specific frequency at which they vibrate when excited. Just as a bronze bell rings at a certain frequency based on its size, shape, and composition, these tiny tuning forks ring at their own fundam...

Researchers reveal secrets of flying snakes

...t length, of the animal's body. He found that body length and wave amplitude are important predictors of flight behavior, but wave frequency was not. "These high-amplitude undulations visually dominate the behavior, yet their frequency is unrelated to the snake's glide performance," Socha said. So why do ...

Researchers test new therapy for advanced melanoma

...treated animals remained disease free for the full length of the study (100 days), Dr. Heller said. Furthermore, he said, even when melanoma cells were reinjected into the cured mice the tumors were rejected. This indicates the immune system formed a memory response that recognized the melanoma cells as fo...

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