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Tag: "becomes" at biology news

Genomic Analysis Uncovers New Targets for HIV Vaccine

...rch to better understand the virus." When someone becomes infected with HIV, the amount of virus in the blood spikes as the virus multiplies. After this peak, the amount of virus in the blood, known as the viral load, gradually decreases and then levels off, a period during which patients do not exhibit sym...

CSIRO scientists join fight to save 'Tassie devil'

... example, devils compete for food. Once the cancer becomes visible and spreads internally through the body, the animal usually dies within a few months from starvation and the breakdown of body functions. The integrated research team at AAHL will use a variety of techniques including microscopy, microarr...

The insect vector always bites twice

...thropod vector, most often a dipteran insect. This becomes infected when it feeds, taking blood from an infected vertebrate host. The pathogenic agent finds conditions to reproduce and proliferate in the vector’s body. In most cases, the parasite moves back into the vector’s salivary glands in order to be tr...

A new plant-bacterial symbiotic mechanism promising for crop applications

...ion with different leguminous plants. It therefore becomes possible to increase agricultural production of a greater number of important plants, notably in tropical countries, while cutting down the use of fertilizers....

Dirty snow may warm Arctic as much as greenhouse gases

...ng primarily attributed to greenhouse gases. Snow becomes dirty when soot from tailpipes, smoke stacks and forest fires enters the atmosphere and falls to the ground. Soot-infused snow is darker than natural snow. Dark surfaces absorb sunlight and cause warming, while bright surfaces reflect heat back into ...

Salty oceans provide early warning for climate change

...eases the density of water. Once a pocket of water becomes salty enough it sinks, drawing in additional water from surrounding areas, and initiates an ocean circulation loop called thermohaline overturning. The scientists discovered that a build up of salt in the waters off the coast of South Africa could...

Researchers examine carbon capture and storage to combat global warming

...he need to find solutions to curb carbon emissions becomes even more crucial, Benson said. From the air t...r every ton of carbon dioxide it emits, so that it becomes increasingly costly to be dirty. Thus the taxes encourage companies to be green. When a clean tec...

Marine phytoplankton changes form to protect itself from different predators

...ns. If eaten by copepods, for example, the carbon becomes part of fecal packages that sink into the deep ocean where a portion of that carbon is sequestered – thereby reducing atmospheric carbon dioxide, a leading greenhouse gas. If consumed by smaller creatures like ciliates, less of the carbon sinks to t...

Staphylococcus aureus hides out in cells

...toxins potentially lethal for the epithelial cells becomes strictly controlled to limit cellular damage. Mechanisms that helped the bacteria to survive and/or multiply, including metabolic and energy production functions, then resumed. Although most of the bacteria had died by about four days as a result of ...

How 'memory' T cells curb the spread of viruses throughout the body

.... After becoming sick from many viruses, the body becomes “immune” (protected) from recurrence of the same disease. This is why before vaccines were developed, childhood diseases such as measles and mumps occurred only once in a lifetime. The immunity occurs when the immune system produces cells called ly...

The mouflons of the Kerguelen archipelago

...homozygotes. The genetic variety of the population becomes impoverished and its evolutionary potential decreases. Furthermore, consanguinity is known to produce genetic diseases. The most heterozygous individuals are better able to resist these diseases,” explains Renaud Kaeuffer. The researchers stress the ...

Turn-ons and turn-offs for neurons

...h, smell or fear, millions of neurons in our brain becomes active. These nerve cells communicate with each other by chemical and electrical impulses to compute incoming sensory information and integrate it via distinct brain regions. With 20,000 - 25,000 genes in our genome, most also expressed in neurons, t...

Male circumcision overstated as prevention tool against AIDS

...ad been found to be important in controlling AIDS, becomes statistically irrelevant once the study controls for the number of prostitutes in a country. The study finds that the more Muslim countries of North Africa do indeed suffer much less AIDS than southern and western Africa, but this lower prevalence is...

New vaccine prevents CMV infection and disease in mice

...can pass along the virus,” explained Spector. “It becomes a serious problem in developing infants during the pregnancy or in those whose immune system is compromised, such as AIDS or transplant patients.” When a persistent virus such as CMV infects an individual, it disarms the host immune system in two...

Want to save polar bears? Follow the ice

...longer periods of time without food as the sea ice becomes more distant and inaccessible. The main question for conservationists is which of the existing 18 populations of polar bears occurring on two continents and one sub-continent stand the best chance of surviving as the polar cap shrinks in size. To...

Scientists: As rainfall changes, tropical plants may acclimate

...ests, they switch to another form of nitrogen that becomes more available in those conditions. The findings, reported in paper set to appear this week in the online edition of the Proceedings of the National Academy of Sciences, present a notable exception to the commonly held idea that tropical plants ar...

Fat screen delivers plant-derived chemical with antidiabetic effects

...lace to store lipids," Tontonoz said. "If the body becomes less able to store lipids in fat, it may deposit in other tissues," where it can spur disease. Despite their efficacy, the development and clinical use of TZDs is limited by adverse effects such as fluid retention, weight gain, congestive heart fa...

Slowing the racing heart

...l are common in heart diseases. When the heartbeat becomes non-rhythmic and chaotic, it can result in fatal arrhythmias and stroke," said R. John Solaro, UIC distinguished university professor and principal investigator of the study. Current treatment of arrhythmia requires destruction of tissue surround...

Herpes infection may be symbiotic, help beat back some bacteria

...r to come in as a secondary infection after herpes becomes latent" Do other latent infections convey similar protective effects" These are not the kinds of questions we're accustomed to asking about such infections, but our findings suggest that we need to start." Virgin notes that human and mouse herpes ...

DNA analysis suggests under-reported kills of threatened whales

...etch as much as $100,000. "The obvious question becomes how much of the mortality is caused by incidental bycatch, and how much of it is actually intentional," Baker said. "Beyond that, if more whales are being killed than reported, why aren't they being reported" Is it to avoid scrutiny of the practice" ...

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