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Tag: "peak" at biology news

Hooked on fishing, and we're heading for the bottom, says scientist

... has revealed that the world passed "peak fish" ?a peak in the biomass, or weight, of fish caught from the...While global catches peaked in the late 1980s, the peak occurred earlier in those parts of the world where industrial fishing developed first. Thus, peak fi...

Georgia Tech accelerates drug discovery with new IBM supercomputing cluster

...y Officer. The new supercomputer, capable of a peak performance of more than 16 TeraFlops, consists of a cluster of 1,000 AMD Opteron processor-based LS20 nodes for IBM BladeCenter systems (total of 4,000 core processors) running Red Hat Linux 4 on the infrastructure nodes and Scientific Linux on the ...

Viral 'fitness' explains different resistance patterns to aids drugs

...ted protease inhibitors (PI) do not experience the peak risk of PI-resistant HIV developing unless they are taking most of their PIs but fall just short of full viral suppression." The researchers found that NNRTI-resistant virus has an advantage over sensitive virus even at very low levels of adherence...

Scientists develop malaria forecasting tool to predict disease risk

...of an epidemic up to five months in advance of the peak malaria season ?the earliest point at which predictions have ever been made. The model will assist doctors and health care providers in preventing and controlling the disease. Malaria is one of the world's deadliest diseases, killing more than on...

Restoring seagrass beds: Is it for the birds?

... the habitats around Robinson Island back to their peak condition," he concluded. ...

Bacteria beat the heat

...d remained steady thereafter. For each enzyme, the peak occurred in the bacteria's "comfort zone." Further comparisons of the enzymes, which were nearly identical, turned up differences in just two of the hundreds of amino acids making up the enzyme sequence. When the scientists replaced these two amino a...

Food-crop yields in future greenhouse-gas conditions lower than expected

...ytime ozone levels during the growing season could peak on average at 80 parts per billion (now 60 parts per billion). Older studies, as reviewed by the Intergovernmental Panel on Climate Change, suggest that increased soil temperature and decreased soil moisture, which would reduce crop yields, likely w...

Matrilin-3 gene discovered to prevent onset of osteoarthritis

...8 weeks of age, the time when mice typically reach peak bone density. Clinical studies in humans have shown that the prevalence of knee and hip osteoarthritis increases with increasing BMD. "Our study reveals an unexpected property of matrilin-3 in maintaining proper BMD, a factor that was not previousl...

Internal body clock dictates timing of different types of stroke

...lysis showed that cerebral infarction had a higher peak in the morning and a lower peak in the afternoon than the other two. Intracerebral haemorrhage and subarachnoid haemorrhage, on t...

New research promising for improving brain cell survival after brain injury

...been published by the Journal of Neuroscience, the peak body journal of the American Society for Neuroscience. "Now our challenge is to understand how BP5 performs it neuron-savingfunction and develop drugs that can do the same thing," Prof Tan said. "Ultimately, we want to deliver the drug to patie...

Beaver dams create healthy downstream ecosystems

...s greatly enhanced hydrologic processes during the peak flow and low flow periods, suggesting that beaver can create and maintain environments suitable for the formation and persistence of wetlands." The study comes as the beaver population in Rocky Mountain National Park is dwindling. Approximately 30 o...

Thermal imaging shatters arousal gender gap myth

...time it takes healthy young men and women to reach peak arousal," said Dr. Irv Binik, psychology professor and founder and director of the Sex and Couple Therapy Service of Royal Victoria Hospital, which is part of the McGill University Health Centre (MUHC). Thermal imaging, or thermography, is i...

Walking not enough for significant exercise benefits

...active traditional fitness regimen increased their peak oxygen uptake, an indicator of aerobic fitness, by 10 per cent. Those who took part in the walking program experienced a four per cent increase. Systolic blood pressure also dropped by 10 per cent for the traditional fitness group, compared to four p...

Reading Shakespeare has dramatic effect on human brain

...d within a sentence. This process causes a sudden peak in brain activity and forces the brain to work backwards in order to fully understand what Shakespeare is trying to say. Professor Philip Davis, from the University's School of English, said: "The brain reacts to reading a phrase such as ‘he godd...

Biofuel cells without the bio cells

...tite, dim; hematite, bright. How bright? "The peak current, or flux, doesn't run long, just a few seconds," Squier said, "but flux is at least as good as what you would find in the most efficient bioreactors, which rely on living bacteria." Biological fuel cells, or biofuel cells, are not yet power...

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

...ad across the country and the date of the national peak in flu deaths. They used government estimates of p...d the usual time taken for a flu epidemic to reach peak levels across the US was about two weeks, and that the national peak date was within two days of the...

Progress made in HIV vaccine development

...xplained Graham. "HIV-specific CD4 responses also peak early in infection; however this response diminishes soon after seroconversion. Maintenance of a functional HIV-specific CD4 T cell response correlates with long term non-progression of HIV disease." Harriet L. Robinson, PhD, from Emory University...

Global changes alter the timing of plant growth, scientists say

...udy also showed that plant growth--as evidenced by peak "greenness"--occurred earlier in the growing season when the grassland was exposed to warming, simulating future conditions. But plant growth was delayed by elevated carbon dioxide, consistent with the fact that grasses--which make up the majority ...

NASA satellite data helps assess the health of Florida's coral reef

...r in coral reef health. Bleaching events typically peak when waters reach their warmest levels, usually in late summer and early fall. Phenomena like El Niño have also been linked to declines in reef health. During the strong El Niño of 1998, about 30 percent of coral off the Florida Keys died after a sin...

Monoclonal antibody reduces exacerbations in asthmatics

...nt efficacy for the primary endpoint of monitoring peak expiratory flow (PEF), it did produce a significant decrease in the diurnal (during the day) variation in the PEF rate." (With PEF monitoring, patients take as deep as a breath as possible, then exhale as forcefully as possible into the mouthpiece o...

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