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Tag: "low" at biology news

Sponges as drugs

...potential, most of the species occur in relatively low densities compared to species in temperate areas. De Voogd discovered that as a result of this low natural density, surprisingly few Indonesian species are suitable for sea rearing. Sea rearing Sed...

Life detection instrument passes key test on road to Mars

...e "Soil Pit." One thing they learned is that with low environmental levels of organic compounds, as is likely to be the case on Mars, the microfluidic channels in the capillary disks don't get clogged as readily as they do when used to test samples in Berkeley with its high bioorganic levels. That means...

New miniaturised chip dramatically reduces time taken for DNA analysis

... meet the current need for DNA to be analysed at a low cost with easy-to-use devices that do not need to be supervised by highly trained scientists. ...

Major new UNC-based drinking water study suggests pregnancy fears may be overstated

...of brominated disinfection byproducts and one with low levels of all disinfection byproducts. None of the utilities was selected because of water quality or health problems. Between December 2000 and April 2004, the team recruited 3,132 women in the three areas who were planning a pregnancy or who had b...

Antiretroviral Therapy May Prevent HIV Transmission From Breastfeeding Mothers To Infants

...cessity opt to breastfeed, is to achieve similarly low transmission rates." ...

U of T researchers map role of Epstein-Barr virus in cancer

.... Through binding USP7, EBNA1 keeps the p53 levels low so cells will continue to divide when they shouldn't, which means they're now more likely to develop into cancer," Frappier says. "All viruses known to be able to cause cancer, like the human papillomavirus that causes cervical cancer for example, h...

Cancer related gene p53 not regulated as indicated by previous tissue culture research

...53 protein is very unstable and found only at very low levels in the cell. But when the cell senses that its DNA has been damaged, it slows down the degradation of p53, so that p53 protein levels can rise and initiate protective measures. When higher than normal levels of p53 tumor suppressor exist, ther...

Random gene expression may drive HIV into hiding

..., they found that cells that initially expressed a low level of virus were very unstable: After a few day... When Weinberger took one infected human cell with low levels of the virus and allowed it to proliferate into many genetically identical copies of itself, ...

Fragile US vaccine system needs improvement despite dramatic gains in health over past century

...and third-party payers that has resulted in record low levels of vaccine-preventable diseases and record high levels of immunizations among children. According to the article, however, problems with vaccine supply, cost and safety threaten to derail the vaccine successes of past decades, and the system f...

The making and breaking of microtubules

...uring the initial steps of microtubule growth. At low temperatures, GMPCPP-bound tubulin forms curved ribbons of a few protofilaments side by side; as they grow wider the ribbons close into very large helical tubes with a diameter of 500 angstroms, instead of the slim, 25-angstrom diameter of a microtub...

Fat's fate depends on its source

... a diet completely lacking fat, the mice developed low blood sugar and fatty liver. Both conditions were reversed when the researchers restored fat to the animals' diets. "It is quite paradoxical," Semenkovich said. "When we inactivated fatty-acid synthase in the liver and eliminated fat in the diet, th...

Specialized immune-system B cells play double-barreled role

...which one kind of B-1 cell consistently provides a low level of protection, while the other specifically responds to an infection to help eliminate it." According to Haas and Tedder, the findings offer potential insights into the mechanism of vaccine action. For example, the new insights into the roles ...

Using nanoparticles, in vivo gene therapy activates brain stem cells

...duce, non-viral vectors typically suffer from very low expression and efficacy rates, especially in vivo. "This is the first time that a non-viral vector has demonstrated efficacy in vivo at levels comparable to a viral vector," Bharali said. In the UB experiments, targeted dopamine neurons -- which de...

One hit of crystal meth causes birth defects

...hat meth abuse during pregnancy is associated with low birth weight, cleft palates and other malformation... says Wells. "It's pretty remarkable that a single low dose can have such an effect. "It's an important finding, given the increasing use of club drugs am...

Bacteria feed on smelly breath (and feet)

... of the levels of methylotrophic bacteria present, low levels of which may be associated with bad breath. In a previous paper, Dr Wood et al found that the foot is also a source of methylated sulphides and strains of these odour eating bacteria, including Brevibacterium and Methylobacterium, which are a...

Motor transport in bio-nano systems

... system exhibits a genuine phase transition from a low flux to a high flux state. Likewise, regular patterns of filaments have been shown to lead to enhanced motor diffusion along the substrate surface. All of these results have been obtained from a combination of analytical calculations and computer sim...

Scripps research scientists identify infertility molecule

...din levels. This is a significant finding because low implantation rates are one of the major issues facing women who use assisted reproductive technologies, and nobody has ever considered LPA signaling to be involved in implantation. If the same pathway turns out to be relevant in human embryo implanta...

Newly discovered genetic disease sheds light on body's water balance

...ering the diagnosis of NSIAD as an explanation for low sodium levels in their pediatric patients." MEDIC...tal with symptoms of fluid overload and strikingly low levels of sodium in their blood. The first child suffered from severe irritability. A few months lat...

Scalpel-free surgery could reduce risk of HIV and hepatitis exposure for health care workers

...psy. While the patients in this study tend toward low socioeconomic status and increased substance use, most university hospitals in the United States are located in urban areas and serve a similar patient population, added Makary. Other authors on the report are Eric S. Weiss, Theresa Wang, Dora Syin,...

Purdue scientists may have found key to halting spinal cord damage

...by the body and is non-toxic at normally occurring low levels, it becomes hazardous when its concentration increases, as it often does in tissue that experiences stresses such as exposure to smoke or pesticides. That list of stresses now includes physical damage, and in the case of spinal injury, acrolei...

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