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Tag: "greater" at biology news

The influence of the menstrual cycle on the female brain

...or example, that the female response to cocaine is greater in the follicular phase of the menstrual cycle4 th...ly the amygdala and the orbitofrontal cortex, to a greater extent during the follicular phase (4 to 8 days after the start of the period) than during the lutea...

Common parasitic infection leads to increased risk for HIV infection

...oman with trichomoniasis is at about fifty percent greater risk for acquiring HIV than a woman without trichomoniasis, after adjusting for other differences between the women such as differences in the rates of condom use, number of sex partners, etc." said McClelland. The study pointed to several reasons...

Smokers quit after damage to brain region

...of disrupting the smoking addiction was many times greater when the insula was involved. ...

Coated nanoparticles solve sticky drug-delivery problem

...ticles are more desirable because they can release greater amounts of medicine over a longer period of time. "We wanted to make the particles as large as possible," said Hanes, who also serves as director of therapeutics for the Institute for NanoBioTechnology at Johns Hopkins. "The shocking thing was how fa...

Opening windows may be the best way of preventing transmission of airborne infection

...racterized by large windows and high ceilings, had greater ventilation than modern naturally ventilated rooms. The authors went on to calculate what these results might mean for transmission of infection and estimated that in mechanically ventilated rooms 39% of susceptible individuals would become infected ...

Chromosomal microarray analysis proves accurate

... said, he hopes to develop tests that will look at greater areas of the genome. However, he said, there are many areas of the genome where all normal people have gains or losses of genetic material compared to the average genome. "It is difficult to determine if it is causing a problem or not," said Beau...

Breathing easy: When it comes to oxygen, a bug's life is full of it

...tem that vertebrates evolved. Insects deliver much greater volumes of oxygen, in proportion to their size, than do mammals. They also deliver oxygen directly to the tissues, while vertebrates dissolve oxygen in blood, transport it to tissues, and then reconvert the oxygen to usable form. Live action foo...

Unique tomatoes tops in disease-fighting antioxidants

...now if tomatoes rich in cis-lycopene would provide greater health benefits to humans, but the study's results...t during absorption the levels were some 200 times greater than those of trans-lycopene, which were nearly non-existent. While cis-lycopene is by far the most ...

Widely used hepatitis B drug spurs HIV drug resistance

...ver, at increasing concentrations, the drug had no greater impact on suppressing HIV replication. HIV is a virus renowned for its ability to change form and thus evade or develop resistance to therapies designed to stop its action. Similar testing with entecavir, immune cells and the M184V form of HIV ...

The great escape -- fleeing fish fall in line

...t in a given school certain individuals may have a greater influence on the escape strategies of the whole school.? Researchers are keen to explore whether the tendency to keep a fixed chronological order of escape corresponds to a leadership maintained over a relatively long period of time....

Mechanical 'artificial hearts' can remove need for heart transplant by returning heart to normal

...ion therapy used. The improvement observed was far greater than what has been reported to date for any other therapy in patients with severe, but less advanced, forms of heart failure. "The study also highlights the fact that 'end stage' heart failure can be reversed and that the heart has the capacity to...

By 2048 all current fish, seafood species projected to collapse

...searchers also determined that the problem is much greater than losing a key source of food. Damage to the oceans impact not only fisheries, but the ocean ecosystem's overall productivity and stability. Specific services that have declined involve the maintenance of water quality by biological filtering, the...

New study: Preterm birth causes one-third of all infant deaths

...earchers to speculate that premature birth plays a greater role in infant death than the official reporting system indicates. The researchers proposed a new method to determine the contribution of premature birth to infant mortality. They reviewed causes of infant death and combined conditions, such as resp...

Bacteria in small sea life yield new way to make potential cancer drugs

... the researchers want to figure out how to produce greater quantities of compounds for testing and drug development. E. coli is a good producer of compounds, but yields are not yet practical. ...

Science researchers genetically transform immune cells into tumor fighters

...rching for ways to fine-tune the treatment so that greater numbers of the engineered T cells will survive and continue expressing their new receptor genes, since their expression does seem to wane over time, the Science researchers found. Devising new ways to insert the receptor genes in the T cells, usual...

MRSA toxin acquitted: Study clears suspected key to severe bacterial illness

... infected with strains absent the PVL was slightly greater than those containing the toxin. The strong association between PVL and CA-MRSA makes the toxin an excellent marker to track community strains, but the assumption that it is the major virulence determinant driving this epidemic is simply not true." ...

Are genomic technologies the answer to world hunger?

...emi-Arid tropics (ICRISAT) highlights the need for greater and more efficient collaboration between the publi...c funded research centres. Others argue that even greater private-public interactions are not sufficient. Dr Andy Hall, from the Maastricht Economic and Soci...

Hundreds of thousands of viral species present in the world's oceans

...pproach identified tremendous viral diversity with greater than 91% of DNA sequences not present in existing databases. Angly and colleagues analyzed the distribution of marine phages among the sampling sites and found a correlation between geographic distance and genetic distance of viral species, suppor...

Einstein researchers demonstrate a novel approach to treating AIDS

...in the treated mice was significantly reduced. The greater the antibody-radiosotope dose, the greater the proportion of HIV-1-infected cells that were killed. Both isotopes proved effective in eliminati...

Researchers seek to design first treatment for neuroAIDS

... mixed lineage kinase 3 (MLK3) may be "of equal or greater importance" than GSK-3b. HIV exposure throws off the ability of MLK3 to regulate enzymes that maintain the balance between cell survival and cell death, shifting it toward death. MLK also regulates p38, an enzyme that encourages inflammation. Thus, M...

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