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Tag: "low" at biology news

Device traps, disables harmful bacteria

...h risks associated with bioaerosol exposure are as low as practical." ...

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

...rgeon Gilbert Upchurch, M.D., the rodents that had low neutrophil levels or no neutrophil-attaching protein developed little or no sign of aneurysm. Meanwhile, the injury to the aorta wall prompted the rapid formation of aneurysms in the normal rodents -- aneurysms that made the diameter of the blood ves...

Research suggests fitness of Florida panthers improved by limited breeding with Texas animals

..." for an array of genetic abnormalities, including low sperm counts and heart defects. "It turns out that purebred kittens don't survive very well," he said. "They die in very high numbers. Once you get new blood, those defects disappear from the population. Hybrids are better than inbred animals." The ...

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

...rs who seem reasonably healthy might actually have low level malarial infections that are eliminated by Fansidar, allowing the immune system to develop to its full potential." WEHI's Dr James Beeson adds, "Most of the 2 million or so annual deaths from malaria and much of the severe illness involves ch...

Squeezing out dune plants

...chelys kempii). According to the scientists, in a low sea-rise scenario, plant communities fully developed over five years, but in cases of moderate and high sea level rise, plant communities were too stressed to grow in many areas, leading to smaller dunes and an eventual breakdown of dune formation. I...

Aloe vera coating may prolong freshness, safety of fruits and vegetables

...loe vera gel and stored them for five weeks under low temperature while exposing a group of untreated table grapes to the same conditions. The colorless Aloe gel used in this study was developed through a special processing technique that maximized the amount of active compounds in the gel, Valero and a...

Unweaving amyloid fibers to solve prion puzzles

...myloid structure, he instead used a combination of low resolution tools to analyze varieties of prion strains and piece together the puzzle of how amyloids form. "We now have an overall picture of how prions join together to form the amyloid's molecular structure," says Lindquist, who also is a professo...

Opiate cocktail may spare cells from morphine's dark side

... which is tolerated, with limited side effects, at low doses. The authors indeed found that the combination of morphine with the methadone mixture prevented the activation of cellular signaling pathways associated with morphine tolerance and dependence. They also showed, perhaps most importantly, that w...

Clearing jams in copy machinery

...rases, the high fidelity Pol III replicase and the low fidelity Pol IV, coordinate their action to cross obstacles encountered in the replication process. They attach themselves at the same time to one beta sliding clamp. Pol III copies the original DNA, and acts as a proofreader to catch any misspelling...

Gene for immune deficiency syndromes found

...ory of recurrent infections and were found to have low levels of immunoglobulin A (IgA), immunoglobulin G (IgG) or both. TACI mutations interfere with two aspects of the immune response that involve maturation of B cells, the white blood cells that make immunoglobulins, which function as antibodies, to ...

Protein amplification in melanoma is possible drug target

...ory of recurrent infections and were found to have low levels of immunoglobulin A (IgA), immunoglobulin G (IgG) or both. TACI mutations interfere with two aspects of the immune response that involve maturation of B cells, the white blood cells that make immunoglobulins, which function as antibodies, to ...

NYU chemists use computer simulation to enhance understanding of DNA transcription

...ncentrations and "beads-on-a-string" structures at low salt, demonstrating that the structure of chromatin strongly depends on its salt environment. To Schlick and her colleagues, these results revealed that in a low-salt environment, linker DNAs in the array were repelled, preventing array folding and ...

Nanotubes inspire new technique for healing broken bones

...rs, but they have a number of drawbacks, including low strength and the potential for rejection in the bo...igh mechanical strength, excellent flexibility and low density of carbon nanotubes make them ideal for the production of lightweight, high-strength materia...

'Cookbook recipes' would cure disease with nontoxic DNA delivery systems

...n self-assembled anionic lipid-DNA structures. At low membrane charge densities, for example, anionic lipids and DNA molecules self-assemble into structures with alternating layers of DNA and anionic membranes bound together by cations, Wong said. At high membrane charge densities, there is a surprise: ...

Solution to 'legionella'

...reduces the formation of biofilm even at extremely low levels ?and maintains this to such an extent that the fixing of "legionella" bacteria or any other micro-organisms needing biofilm in order to grow in the system, is impeded. ...

Enzyme affects hypertension by controlling salt levels in body

...hypertension. If less than 99 percent is absorbed, low blood pressure develops. Dr. Huang said that not ...r understanding of hypertension that is induced by low potassium intake. Previous studies have shown that diuretics, a class of drugs commonly used to cont...

Israeli scientists successfully transplant frozen-thawed ovaries in sheep

..."We used parthenogenic activation as we had only a low number of oocytes and because IVF success in sheep depends on the quality of the ram's sperm. This way, we knew that the development of the embryo depended solely on the quality of the ooctye," said Dr Arav. Two years after transplantation the resea...

Breast tumors in mice eradicated using cancer vaccine

...gen, particularly when the antigen is expressed at low levels on normal tissue as with Her2/Neu," explains Paterson. "So how is the body to mount a strong enough immune reaction?" In general, bacteria are good at inducing both innate and adaptive immune responses, activating such immune cells as macroph...

New tooth enamel dating technique could help identify disaster victims

...cosmic ray interactions with air and is present at low levels in the atmosphere and food. Atmospheric testing of nuclear weapons from 1955 to1963 produced a dramatic surge in the amount of radiocarbon in the atmosphere, Buchholz said. "Even though the detonations were conducted at only a few locations, ...

Drugs from the deep blue

...h of a wide range of tumor cell types even at very low concentrations. It appears to block cancer cells from dividing at a different, earlier step than that targeted by other clinically important anticancer drugs. "It uses a different mechanism to any known drug, it's unlike anything else," Molinski sai...

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