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Tag: "average" at biology news

Researchers from the UGR use a bacterium to obtain biopreservatives from food

...re fermented food, improve quality, and extend the average duration of many foods for centuries. The work presented in the doctoral thesis approaches the molecular aspects of the permeabilization that AS-48 exerts on bacterial membranes. "We designed a strategy to carry out site-directed mutagenesis on th...

Proteins important in Alzheimer's, Parkinson's disease travel in the slow lane

...w components, with a 200 to 300 fold difference in average velocities," says first author Subhojit Roy, MD, PhD, a neuropathologist and Research Associate in the Department of Pathology and Laboratory Medicine. "While scientists have seen proteins in the fast component move rapidly to the tip of the axon, un...

Procedure predicts embryos most likely to result in pregnancy

...year in the United States. In 2002, 3.1 embryos on average were transferred in IVF cycles, but only 34.3 percent resulted in pregnancies. Of those successful pregnancies, 29 percent resulted in multiple births. These statistics remained unchanged within the last decade suggesting that an improvement is neede...

Are journal rankings distorting science?

...ance period, applying weightings to adjust for the average number of references across journals, or scoring journals on only their most important papers. It’s easy to criticise bibliometrics, but we should attempt to refine them and debate in parallel how we can track academic careers and encourage fewer,...

New research says winning a Nobel Prize adds nearly 2 years to your lifespan

...ts, of whom 135 actually won a Nobel Prize. The average life span for this group was just over 76 years. W...Nobel Prize were found to live 1.4 years longer on average (77.2 years) than those who had "merely" been nominated for a prize (who lived on average for 75.8 y...

Parasite infection may benefit MS patients

...months of the study. Patients were followed for an average of 4.6 years. During the study period, there were three clinical relapses of MS in the infected group and 56 relapses in the uninfected group. Only two infected patients showed minimal Expanded Disability Status Score changes (EDSS is used to measu...

Using dental X-rays to detect osteoporosis

...ne. In four clinical centers, 671 women with an average age of 55 years were recruited. To obtain the “gold standard? the team measured bone thickness at the femur, hip, and spine, using the technique that is common for this kind of expensive examination (Bone Mass Density, BMD). In addition, one panorami...

Mother knows best: Plant knowledge key to childhood health in remote Amazon

...s who had knowledge of local plants well above the average were more likely to have children with better health, whereas mothers who had less than the average knowledge were more likely to have children with worse indicators of health and nutrition. For examp...

Scientists map air pollution using corn grown in US fields

...ause plants provide a cost-effective way to record average daytime conditions over several months. Plants take in carbon dioxide gas, from both background and fossil fuel sources, during photosynthesis, and it becomes part of the plant tissue. In summer 2004, UCI scientists collected corn from farms ...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

...out limonene resulted in a slight reduction in the average particle concentration, while operation of the ozonolysis purifier resulted in no detectable effect on the particle level. When limonene was added to the room, the particle concentration shot up in both cases, on some occasions up to 100 times the or...

Hay fever can send work productivity down the drain

.... Although collectively the participants missed an average of one hour of work per week during the year-long study, most hours were missed during peak hay fever seasons ?namely spring and fall. In reality, this may result in missing a couple to several days of work a week during allergy season. People und...

Chemicals in brown algae may protect against skin cancer

...size. Animals exposed only to UVB developed an average of 8.5 skin tumors. The animals fed the lower and the higher dose of BAPs developed an average of 4.7 and 3.7 tumors respectively. Of those given the topical treatment, the lower and higher doses...

Chromosomal microarray analysis proves accurate

...ains or losses of genetic material compared to the average genome. "It is difficult to determine if it is causing a problem or not," said Beaudet. Comparing a child’s genome to that of the parents can often determine if this is a normal familial variation or a disease-causing one....

New UD technology removes viruses from drinking water

...s could be enlarged to the size of a baseball, the average bacterium would be the size of the pitcher's mound, and a single cell in your body would be the size of a ballpark. "By using elemental iron in the filtration process, we were able to remove viral agents from drinking water at very high efficienci...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

...es because of their near-shore migrations. With an average population increase of about eight percent per year, the east coast cownose ray population may now number as many as 40 million. The rays, which can grow to be more than four feet across, eat large quantities of bivalves, including bay scallops, oyst...

Faster, low cost sequencing technologies needed to drive era of personalized medicine

...irs of DNA in a single day. This is the size of an average mammalian genome and is approximately 10,000 times more bases per day than can be sequenced using current technologies. By increasing the speed of sequencing and reducing its cost, genetic research may develop a more significant role in everyday med...

Light wine intake is associated with longer life expectancy in men

...searchers found that a light intake of alcohol (on average less than one glass per day) was associated with a... lower relative risk of cardiovascular death. The average long-term daily intake of the men throughout the 40-year study was six grams based on any alcohol in...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...cent of their time in dense huddles and drop their average metabolic rate by 25 percent has questioned whethe...g penguins throughout their breeding cycle were on average 36.7 ± 0.3°C. During the pairing period, deep body temperature decreased progressively from 37.5°C t...

Neuron cell stickiness may hold key to evolution of the human brain

...least the last 100 million years. We measured the average rate of evolution in the human lineage in these sequences and then identified 992 elements with a significant excess of human-specific nucleotide substitutions relative to the baseline. This is about 79-percent more than we would expect to see by...

Unique gene regulation gives chilly bugs survival advantage at bottom of the world

...Penguins live along the Antarctic coast, where the average summertime temperature is around 36°F (2°C). In laboratory experiments, the researchers exposed the larvae and adults to 39.2°F (4°C) and to 68°F (20°C). They wanted to see if the larval and adult midges showed any resilience against the higher tempe...

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