altered 2 5

Tag: "altered" at biology news

Acid rain causing decline in sugar maples, say researchers

...sil fuels, running factories and driving cars, has altered soils and reduced the number of sugar maple trees growing in the Northeast, according to a new study led by Cornell University researchers. The sugar maple is the most economically valuable tree species in the eastern United States because of its h...

The appearance of your hands can reveal your age, study finds

... Participants were also asked to compare digitally altered photographs of female hands ?blemishes and hand ve...unger. The majority of participants felt that the altered photos of women's hands appeared younger. However, alterations to photos of very elderly hands ?cha...

Fly's courtship sheds light on the formation of innate behaviors

...effecting a behavior, and how that behavior can be altered (and potentially evolve) as the gene itself is affected by external cues, by interactions with other genes, and by the organism's neuronal environments. ...

Knowledge of dendritic cells branches out

...d fraud. These discoveries at WEHI have profoundly altered our understanding of this important aspect of the immune system. The research received advance online publication on the Nature Immunology website on 7 May 2006. ...

Increased sensitivity to nerve signals keeps diabetes at bay

...e presence of food. In contrast, mice genetically altered to harbor an excess number of beta cell M3 receptors show the opposite: a profound increase in glucose tolerance and insulin release, the researchers found. Moreover, such animals become resistant to developing symptoms of diabetes or prediabetes whe...

Recent, rapid climate change is driving evolution of animal species

... change. These genetic changes are in response to altered seasonal events and not to the expected direct eff... behavior, morphology or physiology in response to altered environmental conditions." However, adds Holzapfel, "phenotypic plasticity is not the whole story. ...

Corals switch skeleton material as seawater changes

... that although corals can adapt mineralogically to altered seawater chemistry, doing so slowed the corals' rate of growth by nearly 65 percent. "This provides us with further evidence that corals are extremely sensitive to rapid environmental change, such as global warming," he said. ...

Researchers attack tumor cells by exploiting dependency on sugar metabolism

...nearly 90 years that cancer cells commonly display altered sugar metabolism, the molecular significance of this phenomenon is not completely understood. Now, a new study published in the June issue of Cancer Cell reveals a functional connection between carbohydrate-driven energy production and tumor maintena...

Transgenic goat's milk offers hope for tackling children's intestinal disease

...n antibacterial enzyme found in human breast milk, altered the intestinal bacteria in young goats and pigs that were fed the milk. The researchers hope these findings will one day lead to milk that protects infants and children against diarrheal illnesses, which each year kill more than 2 million children ...

Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience

...entiate effects of psychoactive drugs, that detect altered states of consciousness, that rate mystical experiences and assess changes in outlook. The study, Griffiths adds, has advanced understanding of hallucinogen abuse. As for where the work could lead, the team is planning a trial of patients su...

Gene therapy injected into the brains' of mice with Huntington's disease

...But, if there was a treatment, especially one that altered the natural course of disease, potentially halting it, we would hope every potential patient would get tested so they could avail themselves to the therapy." Researchers used a defective virus, adenoassociated viral vector, (AAV) to deliver gene the...

Light guides flight of migratory birds

...ght patterns at sunset and sunrise, and it was the altered polarization patterns, rather than olfactory cues, that produced the directional biases. Moreover, the effect appeared to result from recalibration of the sun compass. Phillips published the research in the Journal of Theoretical Biology (1988, volum...

Researchers identify human DNA on the fast track

...hanges to HAR1 during human evolution seem to have altered the length and configuration of some of these helices. "It's a brand new structure, unique," said Salama. "The downside is that we don't have many good clues as to how it functions." Haussler's team is now following up on the clues that they do hav...

Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent

...eta rhythm of the epileptic rats was significantly altered compared to the control group. In effect, the theta rhythm became faster and more jittery. Also, the septal neurons of epileptic rats doubled their firing rates in relation to the controls, from about 14 spikes per second to about 29 spikes per secon...

CHAVI announces international search for genes affecting HIV response

...n of a gene. Combining the effect of many slightly altered genes may significantly increase the risk of disease -- in this case, HIV/AIDS. The genome studies will be carried out at the Duke Institute for Genome Sciences & Policy and the University of Lausanne. "Large-scale genome analyses like this are ...

How IVF could be causing genetic errors in embryos

...certain culture media and concentrations of oxygen altered the expression of several imprinted genes. Imprinting is the process by which some genes are activated or inactivated depending on whether they have been inherited in chromosomes from the mother or the father. Professor Paolo F Rinaudo, a scientist...

U of M researchers discover genetic key to treating deadly fungal infections

...he other, replacing it with the duplicate arm. The altered chromosome is known as an "isochromosome." The effect of the duplication is to help the cell tolerate the antifungal drug, thus allowing the yeast to continue growing despite the presence of the drug. The discovery, which is reported in the July ...

Long-term changes in experience cause neurons to sprout new long-lasting connections

...e, the researchers used mice that were genetically altered to produce a green fluorescent protein in specific neurons in the neocortex, which is a region of the brain that is known to adapt to new experiences. The researchers followed the growth of dendritic spines in the region of the neocortex that process...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

... experiments, however, the construction process is altered by the live yeast or bacteria. During drying, the cells actively organize lipids into a sort of multi-layered cell membrane that not only serves as an interface between the cell and the surrounding silica nanostructure, but acts as a template helpi...

It's all in the genes

...roduced. For example, grasses that are genetically altered to prevent weed growth could pass that resistance along to exotic plants, which then might take over a community and change the evolution of that ecosystem. More than 50 researchers from the United States, Canada and Australia are studying this gene...

1 2 3 4 5 6 7 8 9 10