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Tag: "volume" at biology news

MERIS monitoring tracks planetary photosynthesis levels

...ry task: to archive and distribute an ever growing volume of Earth Observation data. Since the start of this year the Earth Science Grid-On-Demand service has been available to registered users. It allows access to a large amount of data and the swift performance of a wide variety of data processing. ...

Device traps, disables harmful bacteria

...his specific filter has a blower that takes a high volume of air and puts it through a filter that screens bacteria and even smaller particles," said Angenent, a member of Washington University's Environmental Engineering Science Program. " And after the filter there is UV light; if something passes through...

Methamphetamine Abuse, HIV Infection Cause Changes in Brain Structure

...IV infection each cause significant changes in the volume of brain gray matter structures and cognitive func... Diego conducted brain scans to analyze structural volume changes in 103 adults divided among four populations: methamphetamine abusers who were HIV-positive;...

High carbon dioxide levels spur Southern pines to grow more needles

...nger able to support," she said. Much of the leaf volume information for her study came after she and others weighed basketfuls of needles that had fallen into collection baskets at the FACE site, she said. While those needles had already dropped from the trees, she could backtrack to the time the needles...

Water management in cells

Water management is the key to regulating cell volume says Dutch researcher Bas Tomassen. He investigate... plasma membrane of animal and human cells. Cell volume is the outcome of a subtle balance between water uptake and secretion by the cell plasma membrane. A...

Enzyme affects hypertension by controlling salt levels in body

...o much salt returns to the blood, increasing blood volume and leading to hypertension. If less than 99 percent is absorbed, low blood pressure develops. Dr. Huang said that not everyone who eats too much salt ends up with hypertension, but some population groups, such as African-Americans, are more prone t...

India's smoking gun: Dino-killing eruptions

...rking hypothesis is that the majority of the total volume of lava might have been erupted in only a few majo... more than 500,000 square kilometers. Its original volume likely exceeded 2 to 3 million cubic kilometers, says Chenet. The entire volcanic episode that creat...

Number Of Babies Born Prematurely Nears Historic Half Million Mark In U.S.

... appeared in the National Vital Statistics Report, volume 54, number 2. The March of Dimes is a national voluntary health agency whose mission is to improve the health of babies by preventing birth defects, premature birth and infant mortality. Founded in 1938, the March of Dimes funds programs of research...

Sudden change in social status triggers genetic response in male fish, study finds

...ance, these brain cells grow eight times bigger in volume and begin producing large amounts of the hormone. As a result, the fish becomes more aggressive, his appearance changes dramatically and his gonads mature. When the male descends in status, the opposite occurs--the hormone-producing brain cells decre...

Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests

...station alone in the same study period. The total volume of harvested trees represents roughly 10 to 15 million metric tons of carbon removed from the ecosystem, according to the authors. They estimate that this amount represents a 25 percent increase in the overall flow of carbon from the Amazonian forest...

DNA self-assembly used to mass-produce patterned nanostructures

...ce. Their research is scheduled to be published in volume 45 of the journal Angewandte Chemie and released early online Dec. 23, 2005. It was funded by the National Science Foundation. "The process we've described creates lattices -- with patterns we specify -- at least tenfold smaller than the best lithog...

Katrina floodwaters not as toxic to humans as previously thought, study says

...ities, were relatively benign," he says. The large volume of floodwater also diluted the potency of many of the chemicals, he adds. While serious toxicity to human life was largely avoided, the floodwater may pose a chemical risk to aquatic life in the area, Pardue says. He believes that low oxygen levels ...

Blocking the nerve receptor EP1 in mouse models reduces brain damage caused by stroke

...an 28 percent greater than in control animals. The volume of damage in mice treated first with the EP1 block...in mice lacking the gene for the EP1 receptor, the volume of brain damage caused by stimulation of the NMDA receptor was only about 75 percent that of mice wi...

Mining biotech's data mother lode

...e life sciences today. "How to integrate the huge volume of disparate data ?on gene expression, protein interactions and the vast output of literature both inside and outside laboratories ?to find out what is important," says Dr Michael Schroeder, Professor of the Bioinformatics group at Dresden Technical ...

Making medicine 'smarter'

...at least 200 scans for a single patient, the sheer volume of images can be daunting for human eyes to evaluate. Meyer-Baese is developing computer software to mimic the way a radiologist analyzes all of that information -- and to do it better and faster. "The outcome of the proposed research is expected...

Yale scientists decipher 'wiring pattern' of cell signaling networks

...nal cells." Over the past several years, a large volume of information on genes in organisms as diverse as man, mouse, baker's yeast and viruses has been generated. While genomic DNA is the blueprint, the encoded proteins are the products that carry out the complex biological functions of cells. Although ...

Human albumin from tobacco plants

...herapeutic ends. It is employed to stabilise blood volume and to avoid risk of a heart attack, its administration in operating theatres being almost a daily occurrence. It is used for haemorrhages, burns, surgical operations or when the patient shows symptoms of malnutrition or dehydration, chronic infectio...

Tiny RNA molecules fine-tune the brain's synapses

... form. When neurons were exposed to miR-134, spine volume significantly decreased, weakening the synapse. When miR-134 was inhibited, spines increased in size, strengthening the synapse. Further experiments showed that miR-134 acts by inhibiting expression of a gene called Limk1, which causes dendritic sp...

Study finds evolution doesn't always favor bigger animals

...The reason: Bigger animals have smaller surface to volume ratios and can more effectively conserve heat in c... Similarly, smaller animals with larger surface to volume ratios are better adapted to warmer environments where they can more effectively dissipate heat. H...

Potential heart benefit found in stem cells

...global left ventricular ejection fraction (EF, the volume of blood pumped out of the heart's main chamber during a single beat) and regional left ventricular wall motion, which is related to ejection fraction, researchers evaluated a treatment with bone marrow-derived cells, attempting to clarify the extent...

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