Tag: "killing" at biology news
Pollution causes 40 percent of deaths worldwide, study finds
... breeding grounds for malaria-carrying mosquitoes, killing
1.2 million to 2.7 million people a year, and air pollution kills about 3 million people a year. Unsanitary living conditions account for more than 5 million deaths each year, of which more than half are children. Air pollution from smoke and var...
High-intensity ultrasound may launch attack on cancer, wherever it lurks
...f Health. In most cancers, what actually ends up killing
the patient is the spread of the cancer from its o...anical HIFU is not as effective as thermal HIFU in killing
tumor cells directly, it has the potential to induce a stronger anti-tumor immune response, Zhong sa...
Caffeine and exercise can team up to prevent skin cancer
...r. The caffeine and exercise seemingly conspire in killing
off precancerous cells whose DNA has been damaged ..., such as caspase-3 an enzyme that is involved in killing
DNA-damaged cells and p53, a tumor suppressor. The differences between the groups in the formatio...
Nature's weapon against nerve agents
... far more glutamate than normal, over-exciting and killing
nearby nerve cells. In related work published earlier this year, by Vivian Teichberg at the Weizmann Institute of Science and researchers at the Beer Sheva University in Israel, activation of GOT in the blood was found to prevent much of the brain ...
Is nutrient loading a smaller problem than we think?
... enrichment leads to epiphytic growth on seagrass, killing
the plants by blocking sunlight, cascading trophic effects are likely have just as much influence. Epiphytic abundance is also controlled by grazers, the absence of which would have the same overgrowth effect as nutrient enrichment. This paradigm c...
Killing only a few animals won't do any harm -- or will it?
...this statement is sometimes true.Sometimes though, killing
even a few individuals can have dramatic consequen...rtant question is: who gets killed" The effects of killing
individuals crucially depend on the size of the victims, says Tobias van Kooten, assistant professor...
Assessing levies for by-catch could fund conservation measures
... the shearwater population by about 6 percent. But killing
the rats would cost only about $500,000, yet yield...e in shearwater population growth. In other words, killing
the rats would increase the shearwater population per dollar invested 23 times more than closing the...
Increase in creeping vines signals major shift in southern US forests
...ricane Hugo struck the southeastern United States, killing
an estimated 20 percent of the forest's trees. The researchers also surveyed five 2.5-acre plots in a second-growth forest a forest that was partially logged about 100 years ago and has grown back along the Savannah River and a major tributary, U...
Tips from the Journals of the American Society for Microbiology
... inhibit the blood stage of equine Babesia equi by killing
the parasites and resulted in reduction of parasit...ysis also demonstrated that longicin is capable of killing
the canine strain, Babesia gibsoni. Here we report a defensin peptide, longicin, from the tick H. ...
Researchers witness natural selection at work in dramatic comeback of male butterflies
...onfirmed that the bacteria were still effective at killing
male embryos. The male-killing ability of the bacteria emerged again after three generations. Thus, they could rule out a change in the bacteria as an explanation for the resurgence of the males in the butterfly populations studied. ...
White blood cells are picky about sugar
...hemicals. These results show that engulfment and killing
by neutrophils varies, depending on cell wall properties of the microbe, explains Whitehead postdoctoral researcher Ifat Rubin-Bejerano, first author on the paper, which appears July 11 in the journal Cell Host & Microbe. We showed that neutrophils r...
New use for a cell toxin found to inhibit survival proteins in cancer cells
...timycin called 2-Methoxy antimycin is selective in killing
cells that have high levels of Bcl-2 and Bcl-xL proteins. The over expression of these proteins in many types of cancer cells correlates with resistance to chemotherapy and radiation therapy. Cells with normal levels of Bcl-2 or Bcl-xL are resistant ...
Maynard Olson receives $500,000 Gruber Genetics Prize
...man lung. The result is that the bug which ends up killing
its human host has very different characteristics from the one which invaded decades, and thousands of bacterial generations, before. And that means effective treatment should also be different. He says, The future now lies in turning genomic methods...
Scientists follow familiar TRAIL to new cancer therapy
...nd cIAP2, and although it had little effect on the killing
of TRAIL-resistant cells when administered alone, combination with TRAIL caused significant death of previously TRAIL-resistant cancer cells in culture and TRAIL-resistant tumors in mouse models. Sorafenib was recently approved by the FDA for treatme...
Tiny tweezers and yeast help St. Jude show how cancer drug works
...why drugs called camptothecins are so effective in killing
cancer cells, according to investigators at St. Jude Children's Research Hospital and Delft University of Technology. Using a type of nanotechnology called magnetic tweezers as well as yeast cells, investigators showed that a camptothecin drug call...
First all-African produced genetically engineered maize is resistant to maize streak virus
...igh level, prevents the virus from replicating and killing
the plant. The transgenic maize variety has proven consistently resistant to MSV and the trait can be reliably passed on to the next generation and in crosses to other varieties. Field trials are scheduled to begin soon, not only to test the effec...
Germany's embryo protection law is 'killing embryos rather than protecting them'
...n pregnancies. As the law currently stands it is killing
embryos rather than protecting them, he concluded. Other figures from the consortium show that the number of ART procedures in Germany has nearly halved since state funding for them was cut. Professor Anders Nyboe Andersen told the conference th...
Wolves of Alaska became extinct 12,000 years ago, scientists report
...rong jaw muscles were larger. They were capable of killing
large bison, Van Valkenburgh said. The ancient wolves suffered many broken teeth and tooth fractures, she said. Van Valkenburgh has also studied tooth fractures in ancient animals at Los Angeles Rancho La Brea Tar Pits and in modern lions, tigers...
New compound effectively treats fungal infections
... enzyme working and thus blocks protein synthesis, killing
the fungal cell. The mechanism crucially depends on a boron atom that is part of AN2690, which is needed to link the compound to the tRNA. It is the first time that scientists describe such a mechanism, suggesting boron containing compounds as a prom...
Specialized, bone-crushing wolves of Alaska disappeared long ago
... bodies, strong jaws, and massive canine teeth for killing
prey larger than themselves and regularly consuming large bones, according to the researchers. Our results are surprising as the unique attributes of Alaskan Pleistocene wolves had not been previously recognized and show that wolves suffered an ext...
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