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Tag: "combination" at biology news

Ongoing collapse of coral reef shark populations

...hitetip and grey reef sharks—by employing a unique combination of fisheries-independent abundance estimates and measurements of the survival and reproduction of individual sharks. Their findings show that reef shark abundance on reefs open to fishing are about ten times lower than on unfished reefs. Moreover, hi...

New study finds chocolate chip cookies lower cholesterol

...October). The chocolate chip cookies, made with a combination of psyllium and plant sterols, are a tasty all-natural approach to reducing cardiovascular risk associated with cholesterol. The American Heart Association estimates at least 50 percent of the American adult population has high cholesterol. The st...

Transplanted brain cells hold promise for Parkinson's disease

...ion was significantly reduced. "This again shows a combination of factors at work," says Dr. Borlongan. "It’s a synergistic effect." He’s now following rats with transplants for six months to see if the early protection/recovery holds up; he’s already past the three-month mark and to date, recovery is stable....

Fishy cooperation

...he reef, but prey has nowhere to go if hunted by a combination of these two predators. The article offers a description and accompanying videos, such as the one showing a grouper and eel swimming side by side as if they are good friends on a stroll. It also offers quantification, which is truly hard to achieve i...

Elusive rust resistance genes located

...self. Wheat plants that contain the Lr34 / Yr18 combination of genes also experience slower rates of rust infection. This prevents widespread and rapid increase of rust spores reducing the potential for disease epidemics throughout the crop. "Up until now it has been difficult to track Lr34 / Yr18 in wheat...

Gene-bender proteins may sway to DNA

...sari said. That broader time window, obtained in combination with the stopped-flow measurements, provided the first direct observation of DNA bending when bound to a DNA-bending protein. "We found that the time-scales on which DNA was bending were very similar to previously reported time-scales on which ind...

Progress made in HIV vaccine development

...ext step, according to Graham, is "to evaluate the combination of DNA priming and rAd5 boosting. Combining these distinct gene-delivery vaccination approaches has the potential to induce higher levels of T cell responses and a different quality of response than either approach by itself." As Robinson and Wein...

Pheromone from mother's milk may rapidly promote learning in newborn mammals

...milk. By presenting newborns with the pheromone in combination with an otherwise "neutral" odor and subsequently testing whether the neutral odor alone would later elicit the typical food-searching behavior in the pups, the researchers were able to show that the pheromone is indeed effective at promoting the abi...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...e two, every now and then you'll get a male with a combination that includes no gene at all. These guys are sterile because they completely lack a gene that's necessary for fertility." The gene, called JYAlpha, is one of the same genes that is essential for sperm motility in the flies, as well as in humans and ...

Malaria treatment efficacy compromised in certain HIV-positive patients

...ing exposes a danger that implementing new malaria combination therapies to treat the disease in immune-suppressed patients could lead to the emergence and spread of antimalarial drug resistance. "This is a major concern, as antimalarial drug resistance is now generally acknowledged to be one of the greatest th...

Two studies on bee evolution reveal surprises

...er institutions examined early bees' structures in combination with bee DNA, producing the largest molecular and morphological study to date on bee family-level phylogeny -- the evolutionary development and diversification of a species. Their goal was to examine the early evolutionary pattern of bees and how the...

Researchers in Montréal and the US create model of key immune-system component

... colleagues demonstrates the importance of using a combination of innovative techniques," said Dr. Bhagirath Singh, Scientific Director of the CIHR Institute of Infection and Immunity. "Their research findings, applied to the body's ability to get rid of infections, will help develop new treatments and approache...

New study suggests promising drug combinations for sleeping sickness

...aging and suggest that the nifurtimox-eflornithine combination has potential as a future therapy for second-stage African trypanosomiasis, and should be evaluated further in clinical trials. ...

HIV gets a makeover

...ssarily translate into human success. Now, using a combination of genetic engineering and forced adaptation, researchers at Rockefeller and the Aaron Diamond AIDS Research Center have created a version of the AIDS virus that replicates vigorously in both human and monkey cells -- an advance that has the potentia...

Rising ocean temperatures, pollution have oysters in hot water

...wed much lower mortality rate, suggesting that the combination of high temperature and cadmium is more stressful ...ium," Lannig said. Once again, this shows that the combination of temperature and pollution combine to intensify the stress placed on the oyster's physiological sy...

Plant-derived molecules, genetic manipulation point to future chemoprevention methods

... experimental drug LG100268 were also effective in combination against breast cancer development more than either...a control diet, a dose of CDDO-ME, LG 100268, or a combination of the two. After 40 weeks, all the control mice developed tumors. However, only 12 percent of mice...

Motorola researchers develop selective sensors based on carbon nanotubes

...ng over the carbon nanotubes. Tao added it's the combination of the structure of the nanotubes and the selectivity of the peptides that make the devices so powerful. "The nanotubes basically are a sheet of interconnected atoms rolled into a tube," Tao said. "Every single atom in the tube is exposed to the e...

Researchers make nanosheets that mimic protein formation

...ique shape of the CdTe nanocrystals gave rise to a combination of forces that conspired to produce the unusual two-dimensional packing. Subsequent experiments by Kotov's group showed that if any of the forces were missing, the sheets would not form, confirming the simulation predictions. "Self-assembly is n...

New engineered drug may offer prolonged arthritis relief

... production of various proteins in cells, with the combination forming "fusion proteins." As the proteins degrade, they yield simple amino acids, which are the building blocks of all proteins. By experimenting with composition, molecular weight and concentration of various ELPs, Betre developed a protein for u...

Pressured by predators, lizards see rapid shift in natural selection

...gy is by its nature an historical science, but the combination of microevolutionary experimentation and macroevolutionary historical analysis can provide a rich understanding about the genesis of biological diversity," the researchers write. ...

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