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Tag: "effects" at biology news

The quest for an effective HIV vaccine presents new possibilities, challenges

...ffort. Vaccines typically work by mimicking the effects of natural exposure to a specific microbe. Because of initial exposure, the immune system develops the ability to recognize the specific microbe and can protect the human body against it if it reappears. HIV, however, has thwarted scientists?efforts ...

Cow protein aids in treatment of gastrointestinal disorder

...eld more effective results, with fewer of the side effects associated with common antibiotic treatment. Lact...the growth of microorganisms and reducing the side effects of antibiotics, respectively, but the new study marks the first time that they have been used togeth...

Study shows dramatic increase in Caesarean sections

...riately selected case can have significant adverse effects when applied to a low risk population. "Caesareans are not without risk for mothers or babies, and should be based on solid medical reasons to ensure the best outcome." In the most recent five year period, spontaneous vaginal births had droppe...

A new portable biosensor detects traces of contaminants in food more quickly and cheaply

...n agriculture and which also has very long lasting effects on the environment- as well as antibiotics in food. The biosensor is faster, more portable and economic than the expensive laboratory methods which are used to detect contaminants, while having a very similar sensitivity. The system has been tested s...

Bats get the munchies too!

...also crave particular types of sugar to reduce the effects of ethanol toxicity. Francisco Sanchez from the Ben-Gurion University of the Negev (Israel) will present data demonstrating this on Sunday 1st of April at the Society for Experimental Biology’s Annual Meeting in Glasgow. The concentration of ethan...

Fat overrides effects of vitamin C

Fats in our stomach may reduce the protective effects of antioxidants such as vitamin C. Scientists at the University of Glasgow found that in the presence of lipid the ability of antioxidants, such as ascorbic acid (the active component of vitamin C), to protect against the generation of potential canc...

City ants take the heat

...il recently, biologists had focused so much on the effects of global climate change, that they had overlooked the effects of urban warming. Now, an international team of biologists, led by Michael Angilletta of Indiana St...

Improved predictions of warming-induced extinctions sought

...19 researchers calls for better forecasting of the effects of global warming on extinction rates. The researchers, led by Daniel B. Botkin, note that although current mathematical models indicate that many species could be at risk from global warming, surprisingly few species became extinct during the past 2...

Fish extinctions alter critical nutrients in water, study shows

...ies, coporo ( Prochilodus mariae ), may have large effects on the ecosystem, in part because of its large contribution to nitrogen recycling. The current study also revealed that species that heavily recycle nitrogen are not always the same ones that recycle the most phosphorus. These differences would mak...

It's never too late to get it back! Aging interrupted

...n produce the same beneficial health and longevity effects without the low calorie diet. The problem is to f...arching for drugs which will have these beneficial effects and slow ageing, even when they are given late in life. One drug, normally used to treat diabetic p...

Whiteflies and plant viruses can help each other to speed up biological invasion

...hat infection of the whiteflies per se has limited effects on the survival and fecundity of the vectors, and the B whitefly acquires the benefits through feeding on the virus-infected plants. Thus the mutualism is indirect. The researchers believe that this kind of mutualism may exist in many circumstances a...

Cloning the smell of the seaside

...rmation of cloud cover over the oceans, with major effects on climate. Indeed, the phenomenon was used by James Lovelock as a plank to underpin his 'Gaia hypothesis'. DMS is also a remarkably effective food marker for ocean-going birds such as shearwaters and petrels. It acts as a homing scent ?like Brus...

Researchers find link between food odors and lifespan in fruit flies

...span and partially reverse the longevity-extending effects of dietary restriction in fruit flies. "Not onl...nies would like to be able to mimic the beneficial effects of caloric restriction by having you take a pill. But for that to work, you need to understand the m...

Tundra disappearing at rapid rate

...y that adds to the growing body of evidence on the effects of climate change. The boundary, or treeline, between forest and tundra ecosystems is a prominent landscape feature in both Arctic and mountain environments. As global temperatures continue to increase, the treeline is expected to advance but the n...

Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle

...ans has remained unclear. To pinpoint hormone effects on the reward circuit, Berman and colleagues scanned the brain activity of 13 women and 13 men while they performed a task involving simulated slot machines. The women were scanned before and after ovulation. The fMRI pictures showed that when th...

Jefferson scientists find rabies-based vaccine could be effective against HIV

...efferson University, and his co-workers tested the effects of inserting two different viral proteins into the rabies virus genome, and using such viruses-based vaccines in preventing disease in rhesus macaques. One was a glycoprotein on the surface of HIV, while the other was an internal protein from simian ...

Gut research yields new anti-cancer approach

...he newly published study, researchers observed the effects of three compounds known from the literature to inhibit PPARgamma, T0070907, GW9662 and BADGE, on the ability of colorectal tumor cells to survive. High doses (10-100 ìM) of all three interfered with colorectal cancer cell growth, reduced the cells' ...

A 'traffic light' for neurons means 'go' for improving brain research

...pes is in neural circuit function." Knowing the effects that different neurons have could ultimately help ...ows this technique can have immediately observable effects in living creatures. The Stanford team's collaborators in Germany were able to cause tiny worms call...

Mechanism of nicotine's learning effects explored

...gic neurons, in the learning centers. In turn, the effects on GABAergic neurons affected signaling between neurons mediated by the key substance calcium. The researchers also discovered key details of the mechanisms by which nicotine excites different kinds of “interneurons?in the prefrontal cortex. Inter...

Researchers from the University of Navarra analyze new kinds of cancer-fighting antibodies

...and we will need more time in order to know if its effects in treatment combinations are as positive as the results on test animals predict. Aside from this, there are another four members of this monoclonal antibiotic family, which stimulate the immune system, currently being developed. Their use in pati...

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