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Tag: "upon" at biology news

New study finds genetically engineered crops could play a role in sustainable agriculture

...s" The answer is that it depends to a large degree upon the type of comparison one makes. When Bt crops are compared to crops sprayed with insecticides, the Bt crops come out looking quite good. But when Bt crops are compared to crops without insecticides, there are reductions of certain animal groups th...

Now, self-healing materials can mimic human skin, healing again and again

...ing itself time after time. The new materials rely upon embedded, three-dimensional microvascular networks that emulate biological circulatory systems. “In the same manner that a cut in the skin triggers blood flow to promote healing, a crack in these new materials will trigger the flow of healing agent ...

Study finds mix of disease processes at work in brains of most people with dementia

...be evaluated every year and to donate their brains upon death. The current study compared clinical and autopsy data on the first 141 participants who have died. Annual physical and psychological exams showed that, while they were alive, 50 of the 141 had dementia. Upon death, a neuropathologist, who wa...

Research finds that circadian rhythms dominate all life functions

...pact of circadian rhythm on all genes. Depending upon environmental factors, groups of genes can function in a synchronized manner, shifting in time against each other and working in what resembles a domino effect. However, very few genes are found to be oscillating in the same phases in different ti...

Experts predict Tamiflu could halve the pandemic influenza death toll versus no intervention

...nt role but their effectiveness would be dependent upon how well the vaccine was matched to the virus.1 “The World Health Organisation provides a strong recommendation for the use of Tamiflu for the prevention of avian flu in people who have been in contact with someone who is known, or suspected of be...

Researchers use MRI to predict recovery after spinal cord injury

...tients, and 22 patients were neurologically intact upon admission. One patient could not be classified. The majority of the patients had been injured in motor vehicle accidents. MRI exams were obtained within 24 to 48 hours of injury. The research team studied three measurable imaging parameters: maxim...

Climate change was the cause of Neanderthal extinction in the Iberian Peninsula

... Climate reconstructions The study is based upon climate reconstructions elaborated from marine records and using the experience of Spanish and international research groups on Western Mediterranean paleoceanography. The conclusions point out that Neanderthal populations did suffer fluctuations rel...

Hearts of male and female rainbow trout are different

... Summary and Conclusions This study expands upon previous findings that sex differences in cardiac performance and metabolism exist in fish in general, and have now been found to occur in rainbow trout in particular. Moreover, the differences are only realized during working conditions and involve ...

US control strategies may make flu epidemics worse, UCLA study shows

...sume that the decision of each individual is based upon self-interest, that people wish to avoid coming down with the flu, preferably without having to vaccinate," said Breban. It is the adaptive decision-making by the individual, the researchers say, that may be an important and previously overlooked ...

Novel system developed to turn data into real-time, interactive 3-D images

... system will be available commercially and improve upon current technology, in terms of image quality and cost-effectiveness. It is compatible with all imaging devices, will translate and display data immediately and in its entirety, and allows for user-friendly manipulation of the data for evaluation and...

Anthrax paralyzes immune cells with lethal toxin, UF research shows

...ly identified one protein that seemed to disappear upon exposure to anthrax. The protein turned out to be responsible for gathering the components of actin and shuttling them to the center of the cell, where they are assembled into filaments. "We've discovered that through this pathway, lethal toxin bl...

Premature births may be linked to seasonal levels of pesticides and nitrates in surface water

...in surface water. This year's presentation expands upon that work. "A growing body of evidence suggests that the consequence of prenatal exposure to pesticides and nitrates as well as to other environmental contaminants is detrimental to many outcomes of pregnancy. As a neonatologist, I am seeing a g...

Researchers develop way to calculate speed of bacterial sex

...nment. Researchers believe this new model improves upon existing models by taking into account characteristics of the natural subsurface environments, the typical bacteria hangouts. This model will help scientists to quantify the spread of important bacterial traits. The swapping of genetic material betw...

Executable biology -- Computer science sheds light on animal development

... fate of C. elegans vulval precursor cells depends upon the time-sequence of two cellular signaling pathways, as well as a negative feedback loop that had not been described before. These kinds of models hold great promise for future exploration of a variety of biological systems, explains lead EPFL r...

NIAID expands capability for influenza research and surveillance

...d to a pandemic situation.? The new awards build upon an ongoing program led by St. Jude Children’s Research Hospital in Memphis, TN, initiated by NIAID after the 1997 Hong Kong outbreak of highly pathogenic avian influenza in humans. Under this program, researchers conducted surveillance of influenza v...

Researchers wake up viruses inside tumors to image and then destroy cancers

...rtunate in that one of the genes that is expressed upon viral lytic induction is EBV's thymidine kinase (E...e researchers screened 2,700 agents until they hit upon Velcade, a targeted chemotherapy drug already approved for use in multiple myeloma. "We were both su...

In young mice, gregariousness seems to reside in the genes

...y experience different emotional states, depending upon whether they are alone or with others, and that specific genes may influence how they feel within different social contexts. Identifying the gene or genes at play, says Lahvis, is the next step. "We now know that social motivation can be responsiv...

Glucose triggers brain cell death in rats after hypoglycemic coma

... degree of oxidative stress was directly dependent upon the amount of glucose given. "We think that this stems from a known link between glucose and NADPH oxidase," Swanson says. "Glucose is a precursor for NADPH, which in turn is used by NADPH oxidase in generating oxidative stress." Swanson explains...

Mine runoff continues to provide clues to microbial diversification

...n the mid-1990s. This latest publication builds upon research that was published in May 2005 by Science. In that paper, Banfield, Hettich and colleagues at ORNL describe the bacterial community that thrives in what amounts to sulfuric acid. Their work set the stage for the latest development because it...

Researchers identify gene involved in dog size

...ity has already been well established. Building upon previous research showing that the IGF-1 gene plays an important role in growth, body size and longevity in mice, the dog researchers used physical observations, X-ray imaging and DNA sequencing and genotyping analysis to study Portuguese water dogs—...

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