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Tag: "dead" at biology news

Scientists discover rare 'gene-for-gene' interaction that helps bacteria kill their host

...ther microbes that might grow in the corpse of the dead insect. To test their findings, the researchers produced a mutant Photorhabdus that is unable to make ST. Without ST, the bacteria were less virulent. The researchers then used a technique known RNA interference to prevent the insects from produc...

Maggots rid patients of MRSA

...heir wounds: they kept them clean. They remove the dead tissue and bacteria, leaving the healthy tissue to heal. "Still, we were very surprised to see such a good result for MRSA. There is no reason this cannot be applied to many other areas of the body, except perhaps a large abdominal wound." Prof...

From the deep -- Researchers find new species of sea anemone

...g in the unlikeliest of habitats ?the carcass of a dead whale. A marine biologist would say that discover...one isn't so unusual. But finding one that calls a dead whale home is what sets this new creature apart. Since the scientists who initially found these a...

DNA analysis suggests under-reported kills of threatened whales

...not previously been used to estimate the number of dead whales available in trade. The analysis uses the frequency of whales found only once in a survey, and those found more than once in the same or later surveys. The DNA profiling and capture-recapture analysis allowed the researchers to estimate how...

Cornell lab confirms deadly fish virus spreading to new species

...Michigan; confirmation is pending. And millions of dead freshwater drum formed windrows of carcasses along the beaches of Lake Erie in 2006, all victims of VHSV. Other species from the Great Lakes Basin area that have tested positive by Cornell include bluegill, rock bass, black crappie, pumpkinseed, sm...

Secret of worm's poison pill box protein could produce new natural insecticide

... which helps the nematode to kill and feed on the dead body of the insect. The toxin not only kills the target insect but prevents other predators from eating the body giving free reign to the nematode worms to consume it, multiply and move on. However, until now, researchers had little idea of the make ...

Are we killing the world's oceans?

...Are we destroying the world's coral reefs? Why are dead zones in the oceans on the rise? Can aquaculture b...idification and coral reefs, the increase in ocean dead zones, scientific and social dynamics during fisheries crises, how we all play a role in the collaps...

Scientists use nanoparticle to discover disease-causing proteins

... Most diagnostic methods must be done on minute dead blood or tissue cell samples in a laboratory dish, said Andy Tao, a Purdue biochemist and senior author of the study. Because molecular interactions and protein functions are disturbed when samples are collected, researchers can't obtain an accurate ...

Scientists find potential 'off-switch' for HIV virus

...T cells all by themselves, but the cell is usually dead before it can happen," Weinberger said. "If we can create drugs that target these enzymes, perhaps we can get SirT1 and related enzymes to assert themselves immediately, forcing HIV into hibernation with high frequency and reducing the threat to the ...

Researchers develop technique for bacteria crowd control

...ulation, using this method can separate living and dead cells or bacteria with different motility. The device, capable to change the thickness of a film from 1mm to 1 micron (with accuracy of 5 percent) and control the position of electrodes, is intended to separate and concentrate small quantities of ...

Napoleon's mysterious death unmasked, UT Southwestern researcher says

...mpaigns. "Even if treated today, he'd have been dead within a year," he said. Dr. Genta completed some of the work for this report while at the University of Geneva. Researchers from the Aarau Cantonal Hospital and the Institute of Pathology at the University Hospital of Basel, both in Switzerland, ...

Experimental vaccine given during pregnancy reduces stillbirths from common virus

...ccine before becoming pregnant gave birth to fewer dead pups and were less likely to transmit the infectio...ted group (10 litters) produced 28 live pups and 4 dead pups—a mortality rate of 13 percent. The control group (8 litters), which received a vaccine for th...

How T lymphocytes attack

...ey were broader and fluid in regions littered with dead tumour cells. The Institut Curie scientists concluded that presence of the antigen halted the T lymphocytes which were then occupied by recognising and killing their adversaries. Furthermore, by analysing the distribution of T lymphocytes through...

Research project tackles 'regeneration' gap

...ls in culture for use as possible replacements for dead or injured cells. The UF project is "bold" because it takes a comprehensive view of regenerative medicine, according to Arlene Y. Chiu, Ph.D., director for scientific activities at the California Institute for Regenerative Medicine. "We are all...

Researchers to study why dead zone returned to Lake Erie

...llion grant will fund a 5-year study examining why dead zones have returned to Lake Erie, and researchers ...the project. "In the 1960s and 1970s the Lake Erie dead zone was a key driver for enacting the Clean Water Act and stimulating the environmental movement. W...

Invasive ants territorial when neighbors are not kin

...considerable numbers of workers. Thomas collected dead workers along small sections of the borders weekly. She estimated that border skirmishes around one of the smaller colonies, at Lake Hodges north of San Diego, killed at least 15 million workers over the six month study. However, ants did not figh...

Male contraception: One door opens, another closes

...arked the announcement of one hot new lead and one dead end. A door opens Researchers in Italy and at the Population Council in New York have announced a breakthrough on a non-hormonal compound known as Adjudin (Nature Medicine, Oct. 29). By injecting the compound as an attachment to a modified horm...

Researchers identify new weapon to fight deadly bacterial sepsis

...s natural defenses, and the outer membranes of the dead bacteria, mainly composed of large toxic molecules called lipopolysaccharides, which go on inducing more inflammatory immune response even though the bacteria themselves are dead." "This inflammatory response causes significant problems with card...

Siberian lakes burp 'time-bomb' greenhouse gas

...gigatons of carbon, largely in the form of ancient dead plant material. "This material has been locked up in permafrost since the end of the last ice age," Walter said. "Now it is being released into the bottom of lakes, providing microbes a banquet from which they burp out methane as a byproduct of decom...

Pattern of human Ebola outbreaks linked to wildlife and climate

...n RoC. Despite the low probability of finding dead animals in the humid forests that cover most of th...osition, Lahm received and verified reports of 397 dead animals. The carcasses, which were found at 35 different sites in Gabon and RoC, included gorillas,...

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