Tag: "experiments" at biology news

Nose odors and mouth odors: The brain distinguishes

...ction's duality, the researchers devised the first experiments to directly compare the same odorants introduced t...use the current study tested only one food, future experiments are needed to determine whether other food odors produce the same differential brain activations," t...

Marine bacterium suspected to play role in global carbon and nitrogen cycles

...ta from several cultivation-independent, molecular experiments led us to suspect that Archaea could be involved in the marine nitrogen cycle. Subsequently having the organism isolated in the lab allowed us to confirm our suspicions," said David Stahl, professor of civil and environmental engineering at the Univ...

New imaging technology shown to detect pancreatic inflammation in type 1 diabetes

...gressed significantly. Recent proof-of-principle experiments by Joslin Diabetes Center and Massachusetts Genera...fact, the drug we used in these proof-of-principle experiments is analogous to one currently being tried in humans with diabetes, and so far showing great promise,...

Why do aneurysms form? New studies suggest leading role for white blood cells

...he U-M researchers made the findings in laboratory experiments on mice that had been treated to wipe out their ne...deficient mice. But the researchers performed more experiments that showed that the lack of MMP-8 was not enough by itself to keep aneurysms from forming. "Someth...

Simple sea sponge helps scientists understand tissue rejection

...nd because its fingerlike structures make grafting experiments relatively straightforward. In experiments carried out on these sponges this summer, Dr. Fernndez-Busquets and his colleagues are studying the ...

Bleach found to neutralize mold allergens

...imilarly under actual field conditions, additional experiments will need to be conducted," said Dr. Martyny. "We do believe, however, that there is good evidence that bleach does have the ability to significantly reduce the allergenic properties of common household mold under some conditions." ...

Old drug, new tricks: Prospects for slashing the impact of malaria

...s own immune system against malaria. Early field experiments were conducted in the African country of Tanzania in the late 1990s. These suggested that giving just one Fansidar tablet to an apparently healthy child during their routine infant immunization visits dramatically reduced the impact of any subsequent...

Once given 'no respect,' cells' tiny RNAS take driver's seat

...f the more than 200 known microRNAs. Through these experiments and others, they discovered that Myc directly controls the gene for a set of six microRNAs in a region of chromosome 13 that is already tied to development of human lymphoma. MicroRNAs are made by the same cellular machinery that makes other forms o...

Vineyard weeds found to host Pierce's disease of grapes

...n addition, she noted that the joint lab and field experiments showed that environmental conditions strongly influenced how rapidly the bacteria multiplied within the plants. ...

Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds

...esis, she and her colleagues conducted a series of experiments at the Madre Selva Biological Station in the Amazonian rainforest of Loreto, Peru. The research team located 10 devil's gardens for the study, ranging in size from one to 328 D.hirsuta plants. Two saplings of a common Amazonian tree called Cedrela...

The very defensive caterpillar

...ne pathogen may confer resistance to another. Most experiments on insect immunity are conducted in the laboratory on insects often fed on antibiotic containing diet so these results suggest that the immune response of insect constantly exposed to pathogens in the field may be very different from all the work des...

Taking a flying jump

...esponses in Drosophila melanogaster, she performed experiments dropping black discs from different angles, on a collision course with the flies. Capturing the responses on video, she showed that flies escaped by means of jumping in a forward fashion and directly away from the object, in addition to using their w...

Helping in a selfish world

...rt of a group." Using a combination of laboratory experiments and underwater field observations in Lake Tanganyika (Zambia), Stiver and Balshine examined how the help provided to breeders varied by how related the helpers were to the breeders. "While some helpers work or care for young because they are related ...

Sugar helps control cell division

...appearance of certain proteins called cyclins, but experiments have shown that you can knock out any of these and...e for Basic Biomedical Sciences. "In contrast, our experiments show that by increasing or decreasing the amount of sugar attached to proteins, the cell cycle is di...

Visceral Leishmaniasis: Successful Vaccine Trial In Dogs

...e system brought on by the vaccination. Laboratory experiments showed that the effectiveness of the vaccine stems from the activation of certain cells of the immune system, the T lymphocytes of type Th1. These induce the infected macrophages to produce nitric oxide, highly toxic for cells. This process, which di...

Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy

...t failure, Rockman said. The researchers' earlier experiments showed that disrupting the function of PI(3)K pres... heart receptors, Rockman added. The researchers' experiments revealed that PI(3)K plays multiple roles as an enzyme that affect heart responses. It manufactures ...

No small feat: First ever gene therapy success for muscular dystrophy achieved

...ted about the impressive results achieved in their experiments using systemic gene delivery, which proved there could be significant therapeutic improvements and even be life-saving. Yet they say their results are far from ideal and more work lies ahead. "It's probably not realistic to expect that we can achiev...

Gaining ground in the race against antibiotic resistance

...re efficiently." The researchers conducted their experiments using a drug called cephalexin, a member of the widely-prescribed cephalosporin class of antibiotics. These drugs and the penicillins, which share a common chemical backbone called the alpha-lactam ring, work by disrupting the bacterial cell wall. Ba...

Mosquito study shows new, faster way West Nile can spread

...ds are initially infected by other mosquitoes. But experiments at UTMB show that when infected and uninfected mosquitoes feed simultaneously on previously uninfected laboratory mice, the virus can pass from mosquito to mosquito within an hour. "We were amazed to see that it could happen," said UTMB associate pr...

Monkeys understand numbers across senses

... experimental design avoided drawbacks in previous experiments whereby animals or babies might have used relative intensity or sound duration, rather than the numerical commonalities extending across sensory modalities. "The results we obtained provide evidence that monkeys spontaneously detect a correspondence...

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