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Tag: "four" at biology news

Double the death rate from cirrhosis for 'blue collar' men

...who drink heavily for more than a decade ?three to four drinks a day for men and two to three drinks a day...cirrhosis rates among unskilled workers were about four times those experienced by professionals. "The very low tax on wine means cask wine is often the...

Dealing deadly cancers a knockout punch

...us gemcitabine completely eradicated the tumors in four of five test animals. It is rare to see the virtual elimination of tumours as well as the long-lasting therapeutic effect that was observed in this study. "Combination therapy results for reovirus in animals are particularly encouraging because t...

HIV survival improves if patients stay in care

...leagues looked at 2,619 men with HIV for more than four years. Most were diagnosed between 1997-1998 at a ...Jan. 1, 1997. Researchers divided the men into four groups based on the number of quarters in the first year after starting treatment that they visited ...

Magnetic computer sensors may help study biomolecules

...rs made an array of spin valves, each about one by four micrometers in size, patterned on a 200-nanometer-thick silicon nitride membrane in fluid. When the spin valves are turned on, a local magnetic field is created that is strongest near the ends of the magnetic stack below the membrane—a field strong e...

New host species for avian influenza identified

...n host species for H5N1 were identified, including four species of goose and the common gull, and dabbling ducks were found to harbor all but two known influenza virus subtypes. The ecological and epidemiological data provided on influenza A virus should assist both in assessing the risk of the virus s...

DNA-damage test could aid drug development

...rate and differentiate in the normal way, dividing four or five times before losing their nucleus and becoming immature red blood cells. Shuga then studied the way these developing cells reacted to three toxic DNA- damaging agents whose effects had been studied by Samson's lab, and found the results co...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...ntly faster than control flies, which lived two to four times as long as the sick ones. "We want to know how the internal clock knows the animal is infected, and how does the immune system know that you are not sleeping properly"" said Schneider. "How do those messages get sent back and forth"" Thei...

Thymus transplants gives hope to babies with fatal immune disease

... begin to act like a thymus gland. Within three to four months, mature T cells begin to appear in the bloo...ection at the Children's Hospital of St. Louis for four months after which her immune system was strong enough to get rid of the virus and prevent other inf...

Scientists seek useful traits in wild cottons

...nts, and results in a lot of damage to those first four true seedling leaves," he said. "We measure the leaf damage, identify cottons that show thrips resistance and subject those to further tests." Sheehan raises Lygus bugs, a secondary pest of cotton, and confines their feeding to certain parts...

Hexavalent chromium in drinking water causes cancer in lab animals

...urces. Male and female rats and mice were given four different doses of sodium dichromate dihydrate in their drinking water ranging from 14.3 mg/l to 516 mg/l for two years. The lowest doses given to the animals in the study were ten times higher than what humans could consume from the most highly cont...

York mathematician probes geometric route to combat viruses

...er group and fund three postdoctoral positions and four PhD students. The group will collaborate closely with the Astbury Centre in Leeds, and they will jointly organise a workshop on Mathematical Virology at the International Centre for Mathematical Sciences in August 2007. Dr Twarock’s group will be...

Improved predictions of warming-induced extinctions sought

...rates are overestimates." A critical review of the four types of model now in common use leads the team to identify various simplifying assumptions in the models that can lead to biases. The authors make eight recommendations for improving forecasts of extinction rates under global warming. The recommen...

MIT's ocean model captures diversity of underwater forests

...ompleted its 10-year virtual evolution -which took four to five days on a cluster of parallel computers-is a phytoplankton community with members that are characteristic of observed phytoplankton communities, including plants similar to prochlorococcus that are extremely abundant in the warm mid-latitude ...

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

...s associated with Epstein-Barr, including at least four different types of lymphoma and nasopharyngeal and gastric cancers. In the March 1 issue of Clinical Cancer Research, a team of radiologists and oncologists from Johns Hopkins Medical Institutions describe how they used two agents already on the mar...

Paper challenges 1491 Amazonian population theories

...ea: three districts, each with 3 (in two cases) or four lakes. "In each we have one lake occupied and u...nt from seven lake bottoms, three in one district, four in the other, that much of Amazonia has not been transformed by human actions, and ideally should be...

30+ AIDS vaccine clinical trials in 24 countries, research occurring on every continent

...AVI and its collaborators are currently conducting four ongoing trials in India, Kenya, Rwanda, Uganda, South Africa and the United States. In 2006, IAVI launched a Phase II trial in Uganda and Zambia, part of a multi-site study that also included three sites in South Africa. The South Africa, Uganda and ...

Jefferson scientists find rabies-based vaccine could be effective against HIV

...owed that two years after the initial vaccination, four vaccinated non-human primates were protected from disease, even after being "challenged" with a dangerous animal-human virus. Two control animals developed an AIDS-like disease. Matthias Schnell, Ph.D., professor of microbiology and immunology at...

Study suggests some drug resistance to influenza B medications

...n available on these seven patients indicated that four were likely infected in a community setting, while the remaining three were probably infected through contact with siblings shedding the mutant viruses. “Continued surveillance for the emergence or spread of neuraminidase inhibitor–resistant influ...

Helium helps patients breathe easier

...e men with moderate to severe COPD were each given four different mixes of gases including room air, while they exercised. During each test they were monitored for exercise time, breathing capacity, work of breathing and symptoms of exertion. The best results were achieved with a mix of 40 per cent oxygen...

Researchers from the University of Navarra analyze new kinds of cancer-fighting antibodies

...als predict. Aside from this, there are another four members of this monoclonal antibiotic family, which stimulate the immune system, currently being developed. Their use in patients began a year and a half ago, and to date no conclusions as to their effectiveness has been published. ...

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