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Tag: "lower" at biology news

Mirrors in the mind: New studies elucidate how the brain reflects onto itself the actions of others

...ted the system more strongly than those who scored lower on the empathy evaluation. While the relationship between motor mirror systems and empathy skills is far from clear, these findings are consistent with the existence of a link between the two. Though mirror neurons appear to relate--and, potentiall...

Effective HIV control may depend on viral protein targeted by immune cells

... T cells are targeted against the Gag protein have lower viral levels than do those with CD8 responses dire...s against several different Gag fragments had even lower viral loads. In contrast, those with stronger responses against other HIV proteins ?including Env, ...

New dwarf buffalo discovered by chance in the Philippines

...e oceans was frozen in glaciers, resulting in much lower sea levels--about 400 feet lower. Because of this, some groups of current islands within the Philippines became connected by land. Some of the mammals, including water buffalo, probably migrated to the Philippines during these periods by swimming sho...

Professors to develop hand-held pathogen testing device

...s in a lot of samples, together with significantly lower false positives," Hashsham said. He said the ha...eded for a number of pathogens. "Because of the lower cost, there also will be applications in countries where fewer resources are available for drinking ...

How brain injury leads to seizures, memory problems

... fire, while GABA(A) inhibits that activity. "When lower levels of the KCC2 transporter weaken the dentate gyrus's ability to act as a gatekeeper," said Dr. Cohen, "neurons become more excitable, and seizures can occur." In addition to its role in inhibiting seizures, the dentate gyrus is also believed...

Proteins anchor memories in our brain

...he thymus, while those who are predisposed express lower levels of insulin in this organ. "What we think is that 'more is better' in the thymus," Anderson says. "If you have more insulin in the thymus, then there is a better chance that potentially destructive insulin-specific T cells will encounter insu...

Cigarette smoking impedes tendon-to-bone healing

... bone. And in the rats exposed to nicotine, we saw lower cellular proliferation." The rats also made less type-I collagen and had different biomechanical properties in their shoulders following rotator cuff repair. Measuring properties called maximum stress and maximum force, the researchers found that ...

Autoimmune disease triggered if T cells miss a single protein early on

...he thymus, while those who are predisposed express lower levels of insulin in this organ. "What we think is that 'more is better' in the thymus," Anderson says. "If you have more insulin in the thymus, then there is a better chance that potentially destructive insulin-specific T cells will encounter insu...

Climate change has surprising effect on endangered naked carp

...he cost of living for the naked carp is 40 percent lower in lake-water than in river-water, and that this difference is almost complete within twelve hours after transfer," write the authors. "The magnitude of this response is remarkable." But they caution, "If the lake continues to dehydrate, these ben...

Very low birth weight linked to reduced quality of life in pre-school children

...es with very low birth weights tend to have a much lower quality of life when they are three or four years ...very low birth-weight children scored consistently lower scores on a scale designed to measure quality of life among pre-school children. Their parents wer...

NASA study: Alaskan fires affected Houston air quality in 2004

...emotely generated pollutants on air quality in the lower atmosphere. In the summer of 2004, researchers in a NASA-led field research project sampled a variety of trace gases and aerosols ?tiny particles suspended in the air ?across North America. That same summer, physicist Gary Morris, both an associate ...

Humpback whales have brain cells also found in humans

...dy mass ratio, a rough measure of intelligence, is lower for baleen whales such as the humpback compared to toothed whales such as dolphins, the structure and large brain size of baleen whales suggests that they too have a complex and elaborate evolutionary history. Patrick R. Hof and Estel Van der Guch...

Researchers reveal mystery of bacterial magnetism

... field, so that they swim away from oxygen at much lower concentrations." It is as if the climber gets tired and turns around sooner when heading up the mountain, keeping her from heading too far in the wrong direction. And the stronger the magnetic field, the bigger the effect. The scientists do not ye...

Like a snail through the intestinal canal

... the characteristics of the middle layer, and thus lower the degree of friction, in order to move. In the intestine, however, pressure cannot be exerted, because this would cause the intestine to become deformed. The solution then is found in using smaller and larger surfaces that slide over each other. If...

Researchers use multiphoton microscopy to watch chromosomes in action

... sciences." Better understanding transcription in lower organisms will help understand the processes in higher organisms, Yao added. "We hope to push the limits to human cells. That's the goal in the next 20 years."...

Winning by a neck -- Giraffes avoid competing with shorter browsers

...eaves high in trees, despite being able to feed at lower levels as well. "This [study] provides the first...n -- smaller browsers eating some of the leaves at lower heights -- or if more leaves grow at higher levels. The researchers built low fences around tree...

Most widely used organic pesticide requires help to kill

... "In moths and butterflies, the complexity is much lower than in mammals, and even some other insects," Broderick explains. The Wisconsin study was conducted using antibiotics to clear all of the native bacteria that colonize the gut of gypsy moth caterpillars. Exposed to Bt, the caterpillars whose intes...

Halving daily cigarette quota has no health benefit

...ers associated with smoking were not significantly lower in those who had cut back compared with heavy smok...as true. And men who cut back only had slightly lower death rates from all causes combined than the heavy smokers during the first 15 years. After that, d...

Smoking changes brain chemistry

...ck per day for one year equals one pack year), the lower the NAA level. "The ACC is involved in mediati... Choline concentrations in the ACC were slightly lower in the smokers compared with the nonsmokers, and lower still in the female smokers compared with the...

High dopamine transporter levels not correlated with ADHD

...related with the disease. In fact, the study found lower levels of these "dopamine transporter" proteins in...aid. "We speculate that this other variable may be lower levels of dopamine release in ADHD subjects." If ADHD subjects release less dopamine to start with...

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