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Tag: "strong" at biology news

Biologists Crack Genetic Code for Specialized Spider Silk

...TACI genes he or she inherits is unable to mount a strong antibody response. Each child of a person so affected has a 50 percent chance of inheriting the mutation and being predisposed to IgA deficiency and CVID. “A test for TACI defects would enable the diagnosis of more children and their relatives with ...

Picky female frogs drive evolution of new species in less than 8,000 years

...that has given rise to a new species based on very strong female choice." As a comparison, they looked at a second contact zone on the border between north and south, where frogs were not isolated from either lineage. "Reinforcement does not appear to occur at the more 'classic' contact between northern a...

Female butterflies go for sparkle -- not size -- when choosing to mate

...lso was not found desirable by females, indicating strong sensitivity to a set of rather narrowly defined fe...y, which butterflies can see, females registered a strong distaste," said Monteiro. "Selection against the absence of UV reflectivity was as strong as selecti...

Bacteria in Household Dust May Trigger Asthma Symptoms

...rchers at NIEHS and the University of Iowa found a strong association between endotoxin levels and the prevalence of diagnosed asthma, asthma symptoms, asthma medication use, and wheezing. These relationships were strongest for bedroom floor and bedding dust. Households with higher endotoxin concentrations ...

Weapon performance determines mating success in the collared lizard

... The study finds that bite-force performance was a strong predictor of reproductive success. However, no siz...has far stronger effects on fitness than size. The strong influence of weapon performance on reproductive success suggests that selection acts on weapon perfo...

DNA size a crucial factor in genetic mutations, study finds

...ing to Kool, these results indicate that size is a strong factor determining enzyme efficiency-and a mechanism for allowing mutations into the DNA molecule. ''It's a way the organism can evolve,'' Kool says. ''If the protein that copies DNA prefers a molecule that's slightly bigger than natural DNA, then i...

Studies on human genome variation provide insight into disease

... prostate cancer susceptibility. "Because of the strong similarity among genes in this region, we had to develop a new technique for our mutational analysis, which we call TAR cloning," explains Larionov. "Using this method, we isolated the SPANX region from 200 individuals by recombination in yeast." ...

Housecat-sized Siberian tiger cubs get collared

... prostate cancer susceptibility. "Because of the strong similarity among genes in this region, we had to develop a new technique for our mutational analysis, which we call TAR cloning," explains Larionov. "Using this method, we isolated the SPANX region from 200 individuals by recombination in yeast." ...

Researcher says flu responders can learn from 1918 epidemic

...d muster, relatively speaking, had been building a strong medical infrastructure for decades, and had sound public health policies based more upon science than politics. I'm not sure that's the case today." Higgins' research has been done under the guidance of three Lehigh history professors: Roger Simon,...

Many smokers fail to quit after cancer diagnosis

...e diagnosis of cancer, according to research, is a strong motivator for many smokers and thus, provides a window of opportunity to begin treatment for smoking addiction. Led by Ellen R. Gritz, Ph.D., of The University of Texas M. D. Anderson Cancer Center in Houston, researchers reviewed the scientific lit...

New factor implicated in allergy and asthma attacks

... Texas Medical Branch at Galveston have discovered strong evidence that an additional factor is necessary to cause the severe respiratory inflammation involved in an allergy or asthma attack. This factor is the damage caused by chemically hyperactive molecules known as "reactive oxygen species," which are s...

Cornell finds natural selection in humans

...ans differ from one another at the DNA level shows strong evidence that natural selection has shaped the recent evolution of our species, according to researchers from Cornell University, Celera Genomics and Celera Diagnostics. In a study published in the Oct. 20 issue of the journal Nature, Cornell scien...

Wolves' top-down effect

...arge-scale studies that so clearly exemplifies the strong role played by a top predator. In the mid-1980s, wolves naturally recolonized the Bow Valley of Banff National Park in Alberta, Canada. The nearby town of Banff has been steadily growing and prevented wolves from fully recovering in areas surroundin...

Past illegal blood donation in China linked to hepatitis C virus infection

...asma donation and receipt of blood transfusion are strong risk factors for HCV infection in rural central China, and that improved blood collection and blood banking practices remain an urgent health priority. "Technical support and drugs are needed to assist these central Chinese provinces cope with the ca...

Research Permits First-Ever Visualization of Psychological Stress in the Human Brain

... the testing was complete. These results suggest a strong link between psychological stress and negative emotions. On the other hand, the prefrontal cortex is also associated with the ability to perform executive functions -- such as working memory and goal-oriented behavior -- that permit humans to adapt t...

NRL scientists detect 'milky sea' phenomena

...lky seas" are hypothesized to be manifestations of strong bioluminescence produced by colonies of bacteria associated with a microalgal bloom in the surface waters. Because of the lack of scientific observations, a full explanation of milky seas has remained elusive. With the current state of satellite tech...

MicroRNA gene that regulates lifespan found by Yale scientists

...r lifespan. According to Slack, their results are strong evidence of an "intrinsic biological clock" that runs for aging as well as for normal organ development. Included results showed the developmental programs that these genes regulate are modulated through insulin signaling, demonstrating the connectio...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...rbit to monitor atmospheric pollution, which has a strong diurnal variation and thereby determine objectively the changing atmospheric composition." SCIAMACHY: surveying the world in six days SCIAMACHY is a spectrometer, and it works by measuring sunlight - either transmitted, reflected or scattered b...

Study uncovers placental microtransfusions lead to transmission of AIDS virus during childbirth

...on in the babies," Meshnick said. "We found a very strong correlation between the enzyme and the risk of infection." It appears that transmission of the virus occurs during labor -- when contractions occur -- rather than during passage of the baby through the birth canal, he said. "It has been known for a...

Prostate cancer uses Wnt signaling proteins to promote growth of bone tumors

...mation and destruction of bony tissue. "There is strong evidence that Wnt proteins play a central role in regulating normal skeletal development in an embryo," says Christopher L. Hall, Ph.D., a senior research fellow in urology at U-M. "But this is the first time Wnts have been shown to be involved in ab...

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