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Tag: "rate" at biology news

Fast test for low blood flow in dogs detects early heart trouble

...t they will lodge into the heart muscle at a fixed rate compared to how fast blood is flowing. Researchers can actually count the number of beads absorbed into the heart tissue to calculate blood flow. However, calculating blood flow from the 3-D, scanned CT images was more complicated. Researchers us...

Carnegie Mellon scientists use 'green' approach to transform plastics manufacturing

...roach continuously reduces CuII to CuI at the same rate CuII forms while retaining the desired balance between the two states. Ultimately, this technique dramatically lowers the overall amount of Cu catalyst used in ATRP by as much as 1,000 times. The team's new technology virtually eliminates the need ...

Mapping the mouse genome

...ces for each strain. On average, the recombination rate was 0.63 cM per megabase (cM/Mb) for HS, and 0.62 ... They also saw a lot of variation in recombination rate across the genome, between the two study groups, and between the sexes. In fact, when calculating ra...

Study IDs protein that inhibits HIV from growing in cell cultures

...ne deficiency. "People with GBV-C have a slower rate of destruction of these T-cells," said Stapleton, who also is director of the Division of Infectious Diseases at the Iowa City VA and UI. The current study shows that the newly identified protein, NS5A, inhibits HIV in part by decreasing the numb...

New study suggests promising drug combinations for sleeping sickness

... (435 were planned), it was obvious that the death rate was much higher amongst individuals receiving one... the trial was stopped. In the trial, the cure rate for nifurtimox-eflornithine was over twice that for melarsoprol-nifurtimox and substantially higher...

Longer-lived rodents have lower levels of thyroid hormone

... College of New York. Thyroid key to metabolic rate The thyroid gland produces thyroxine (T4) which converts to triiodothyronine (T3) in the presence of iodine. T3 is the active component of T4 and is the key hormone in regulating metabolism, Pinto said. When an animal becomes cold, for example, i...

Lab-on-a-chip could speed up treatment of drug-resistant pneumonia

...lls -- those that are still reproducing -- and the rate at which they duplicate helps to identify their species. In the next step, different antibiotics are pumped into the chambers. If the cells in a chamber stop reproducing, that indicates that a certain drug is likely to be effective at fighting the...

Developing uses for sugar-cane bagasse: Biotechnology applied to the paper industry

... was put into the system by forced convection at a rate of 7 g of ethanol per m3 (concentration equivalent to 3° of alcohol in the liquid phase), laccase production increased, to a maximum level (90 U per g of dry bagasse support). This amounts to 45 times the yield obtained without ethanol. Moreover, it ...

Air travel and flu: Post-9/11 restrictions delayed start of season

...that air travel affects both the peak date and the rate of spread of flu. This does not prove that travel restriction would be effective in altering the course of a flu pandemic, but it does provide evidence that air travel plays a significant role in the annual spread of flu in the United States. The fin...

SARS: No evidence that any of the treatments worked

...nd that a particular drug reduced the reproduction rate of the viruses, but most of the studies of these drugs in patients were inconclusive. Of 29 studies on steroid use, 25 were inconclusive and four found that the treatment caused possible harm. From the published studies, it is not possible to say wh...

Mutant mouse provides insights into breast cancer

...ing DNA in both humans and mice that increases the rate of flawed copies of genetic material, leading to m...mice to live normal lives but greatly increase the rate of faulty DNA replications and genomic instability. "It's insidious because there is no warning th...

New research shows big improvement in survival after stroke

...years. The study attributes the improved survival rate to health care factors associated with an increase...rise in stroke rates. Even with declines in the rate of stroke, the number of strokes occurring is expected to rise, with the ageing of the population an...

An artificial cornea is in sight, thanks to biomimetic hydrogels

...ssue has problems, Ta notes, including a rejection rate of about 20 percent and a period for visual recovery of six months to a year. "You get a more predictable shape with an artificial cornea," Ta says. "In many countries, tissue availability is a problem," he says. "If the tissue is artificial, we do...

Tulane researcher reports on origin of deadly fever outbreak

...ublic of the Congo. The team recorded a fatality rate of 83 percent for that outbreak. Young male miners comprised 52 percent of the cases, suggesting that exposure in underground mines was a factor in the spread of the disease. The discovery of multiple different genetic variants of the virus indicate...

Successful lung cancer surgery not enough to break nicotine dependence in many smokers

...atients continue smoking despite the risk, but the rate of relapse ranged from a low of 13 percent to about 60 percent. This study was unique in that it sought to include patients believed to be highly dependent on nicotine - so it included only patients who smoked within three months of their diagnosis ...

Down syndrome: It's not just the age factor

...ive maternal response and it might explain why the rate of Down Syndrome accelerates with increasing maternal age. These findings have important implications for the prevention of abnormal fetal development. The authors conclude that "clearly, identification of the relaxation control mechanisms and th...

Particle size matters to bacteria ability to immobilize heavy metals

...nella ?how it reacts with metal oxides and how the rate of this interaction is influenced by size" Bose sa...eduction rates. Smaller nanoparticles show a lower rate of reduction than larger nanoparticles after normalized to surface area. That is, the bacteria will ...

New engineered drug may offer prolonged arthritis relief

...IL1RA therefore serves to dampen the immune cells' rate of proliferation, Shamji said. White blood cells treated with the modified drug increased in number at a slower than normal pace, evidence of the drug's activity, Shamji reported at the Biomedical Engineering Society meeting. But its potency droppe...

Comparing chimp, human DNA

... accelerated regions" or HARs, which showed a high rate of evolution between humans and chimps. Only three of those regions contain genes that are likely to encode proteins. The most dramatically accelerated region, HAR1, appears to make a piece of RNA that may have a function in brain development. DNA...

Coral stress 'like never in history'

...hensive reef management," says Pandolfi,"…but this rate of recovery isn’t seen in other parts of the world?some reefs still haven’t recovered from [events in the last century]," he says. With the help of the ARC Centre of Excellence in Coral Reef Studies, A/Prof. Pandolfi plans to continue studying fos...

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