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Tag: "decrease" at biology news

Cells selectively absorb short nanotubes

...to the longer nanotube solutions did not undergo a decrease in metabolic activity, but cells exposed to nanotubes below that threshold absorbed them and, depending on the concentration level, died or showed other signs of toxicity. "Our results demonstrate that cellular uptake in these lung cells depends sign...

Widely used hepatitis B drug spurs HIV drug resistance

...e) were taking only entecavir yet showed a tenfold decrease in the amount of HIV in their blood. Previous studies had shown entecavir not to have any significant effects on HIV, about they were based on older tests that could not quantify the effects of HIV on individual immune cells or detect mutations. ...

On automatic pilot

...o walk was scarcely altered but there was a strong decrease in its ability to respond quickly to obstacles in ...g, since certain parts of the cerebellum appear to decrease as we get older....

Something new under the sun

...n. Furthermore the greenhouse can be ventilated to decrease humidity and reduce the temperature. Thanks to modifications and Van Ooteghem's new control system less energy is lost and excess heat is reused. This means that sustainable energy can be used to control the climate in the greenhouse efficiently. ...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...In case of egg loss, body temperature continued to decrease to 35.5°C, with a further 0.9°C decrease during huddling. By contrast, a constant core temperature of 36.9°C was maintained during successful...

Monoclonal antibody reduces exacerbations in asthmatics

...xpiratory flow (PEF), it did produce a significant decrease in the diurnal (during the day) variation in the PEF rate." (With PEF monitoring, patients take as deep as a breath as possible, then exhale as forcefully as possible into the mouthpiece of the PEF meter for three tests. As a gauge for pulmonary fun...

Encouraging results in pancreatic cancer research

...site distant from the tumor, PNC-28 still caused a decrease in tumor size. This tumor growth was significantly slower than growth in the presence of a control peptide." Dr. Pincus added that this peptide and its parent peptide, called PNC-27, are lethal to a wide variety of human cancer cells, besides panc...

Signal protein shows promise for blocking tumor promoters in skin cells

...nths, the group expects to know whether Srcasm can decrease squamous cell carcinoma formation in skin, mentions Seykora. ...

UCSF study will test new vaginal microbicide for herpes and HIV

...gels, was eventually found to increase rather than decrease HIV infection rates. "Nonoxynol 9 was used commonly and was thought to be an extremely safe type of anti-microbial spermicide. But researchers found that it actually increased the rate of HIV infection in women. So now we realize that we must appr...

The effects of smoking on fractures and ligament injuries

...rove or speed the healing process after injury and decrease the significant morbidity associated with cigarette smoking during fracture healing." In the second study, involving the same group of researchers but led by Corey S. Gill, researchers examined the effects of smoking on medial collateral ligament (...

Tearing down the fungal cell wall

...anges that occur in the cell wall of the spores, a decrease in spore germination rate, lower survival rates for the spores under adverse environmental conditions, and a reduced ability of the fungus to damage the host plant. These observations may open up a route to develop new and innovative research strateg...

New study finds chocolate chip cookies lower cholesterol

...Right Direction Cookies daily showed a ten percent decrease in LDL cholesterol as well as shifting the LDL par...collected. Final results revealed a ten percent decrease of LDL cholesterol levels in the plasma of the participants of the Right Direction Cookie group. The...

Researchers develop technologies to devour food pathogens

...ed to kill the pathogens, but too much can cause a decrease of quality in the product, such as browning of leafy greens. "If the product is safe, but nobody will eat it, that's not what we want," Linton said. "We are always thinking in terms of, 'Will this work for industry?' In this case, I believe the ans...

Malaria treatment efficacy compromised in certain HIV-positive patients

...ize the effects of therapy on both diseases and to decrease the malaria burden in HIV-infected individuals. ...

Carnegie Mellon scientists use 'green' approach to transform plastics manufacturing

...reduce the cost of recycling the catalyst and also decrease the release of hazardous reaction byproducts found in industrial waste," Matyjaszewski added. During ATRP, scientists produce a complex polymer structure using a special catalyst to add one or a few monomer units at a time to a growing polymer chai...

Sex and the heart: It's not what you think

...e in men than women. Both men and women saw a decrease in high-risk HDL cholesterol, but men showed greater improvement. The use of cholesterol-lowering medication increased somewhat more for men. More women than men had high C-Reactive Protein (a marker of infection that in elevated levels has been...

Rising ocean temperatures, pollution have oysters in hot water

...e we saw that the cadmium-exposed oysters showed a decrease in blood oxygen content with the higher temperature, but not the control group that was not exposed to cadmium," Lannig said. Once again, this shows that the combination of temperature and pollution combine to intensify the stress placed on the oyste...

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

...ing characteristics. In fact, deficient mice had a decrease in proliferation in colon cells and an increase in apoptosis. The researchers were presented with a significant challenge, in that directly knocking out expression of IGF-1 in mice resulted in severe developmental abnormalities and very low survi...

Climate change creates dramatic decline in red-winged black bird population

...Canada has decreased by 50 percent since 1972. The decrease is related to a positive shift in the North Atlantic Oscillation which has resulted in warmer, wetter winters in the southeastern United States. When Patrick Weatherhead put his 25-year data about the red-winged black bird alongside climate records,...

Pattern of human Ebola outbreaks linked to wildlife and climate

...esearchers urge that public education is needed to decrease human contact with potentially infected wildlife by discouraging people from scavenging dead animals and by promoting safe hunting and trapping practices, especially because the results show that outbreaks in wildlife populations have been much more ...

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