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Killing in Biological News

New Southern California beetle killing oaks

DAVIS, Calif. May 1, 2009U.S. Forest Service scientists have completed a study on a beetle that was first detected in California in 2004, but has now attacked 67 percent of the oak trees in an area 30 miles east of San Diego. Their report appears in the current issue of The Pan-Pacific Entomolo...

Twin nanoparticle shown effective at targeting, killing breast cancer cells

PROVIDENCE, R.I. [Brown University] Breast cancer patients face many horrors, including those that arise when fighting the cancer itself. Medications given during chemotherapy can have wicked side effects, including vomiting, dizziness, anemia and hair loss. These side effects occur because medic...

Scientists fool bacteria into killing themselves to survive

Like firemen fighting fire with fire, researchers at the University of Illinois and the University of Massachusetts at Amherst have found a way to fool a bacteria's evolutionary machinery into programming its own death. "The basic idea is for an antimicrobial to target something in a bacteria t...

Stanford researchers: Global warming is killing frogs and salamanders in Yellowstone Park

Frogs and salamanders, those amphibious bellwethers of environmental danger, are being killed in Yellowstone National Park. The predator, Stanford researchers say, is global warming. Biology graduate student Sarah McMenamin spent three summers in a remote area of the park searching for frogs an...

Too much technology may be killing beneficial bacteria

COLUMBIA, Mo. Too much of a good thing could be harmful to the environment. For years, scientists have known about silvers ability to kill harmful bacteria and, recently, have used this knowledge to create consumer products containing silver nanoparticles. Now, a University of Missouri researcher ...

Major study concludes that global warming is killing off coral

If world leaders do not immediately engage in a race against time to save the Earth's coral reefs, these vital ecosystems will not survive the global warming and acidification predicted for later this century. That is the conclusion of a group of marine scientists from around the world in a major ...

Are we killing the world's oceans?

How will global warming affect ocean circulation and sea levels in the centuries to come? Are we destroying the world's coral reefs? Why are dead zones in the oceans on the rise? Can aquaculture be environmentally sustainable? And how are we all to blame for the collapse of coastal fisheries? Mos...

Ebola outbreaks killing thousands of gorillas and chimpanzees

Why have large outbreaks of Ebola virus killed tens of thousands of gorillas and chimpanzees over the last decade? Observations published in the May issue of The American Naturalist provide new clues, suggesting that outbreaks may be amplified by Ebola transmission between ape social groups. The st...

Killing brain tumors from within: A 'Trojan horse' approach

A new method for targeting malignant brain tumors through inducing the cancerous cells to "commit suicide" has been developed by a team of researchers headed by a Hebrew University of Jerusalem professor of biochemistry. Alexander Levitzki, who is the Wolfson Family Professor of Biochemistry, ...

Nano-particles effective in killing cancer with one-two punch of chemotherapeutics

Research studies, based at the University of Pennsylvania, demonstrate that biodegradable nano-particles containing two potent cancer-fighting drugs are effective in killing human breast tumors. The unique properties of the hollow shell nano-particles, known as polymersomes, allow them to deliver ...

Invasive species harms native hardwoods by killing soil fungus

An invasive weed that has spread across much of the U.S. harms native maples, ashes, and other hardwood trees by releasing chemicals harmful to a soil fungus the trees depend on for growth and survival, scientists report this week in the Public Library of Science. The tree-stifling alien, garlic mu...

Malaria killing a million a year

The prevention and treatment of malaria has made progress since 2000, but an annual death toll of 1 million people presents challenges as the mosquito-borne parasitic disease makes a comeback, the first joint malaria report from the UN World Health Organization (WHO) and UN Children's Fund (UNICEF)...

Scary ancient spiders revealed in 3-D models, thanks to new imaging technique

...t of the body, which suggests that it used its legs to grab its prey before killing them. The researchers believe this find suggests the Cryptomartus hindi w...and fronds, waiting for prey such as insects to walk by before catching and killing them. This stance is seen in modern day crab spiders, which sit on the edge...

Fox Chase researchers uncover one force behind the MYC oncogene in many cancers

..."While MYC has a definite role in cancer, MYC also has an important place in the normal functioning of cells, so it may be difficult to target without killing healthy cells," says Joseph Testa, PhD, a Fox Chase professor and co-author of the study. "DLX5, however, is not generally active in healthy adult cel...

121 breeding tigers estimated to be found in Nepal

...es, meat in some cases although not reported in Nepal) and use in traditional Chinese Medicines (TCM). Apart from these, sporadic cases of retaliatory killing from irate communities have been reported. Other important reasons of tiger population decline are habitat shrinkage and fragmentation due to human in...

Spring cold snap helps with stream ecosystem research

...cannot count on unexpected weather events to maintain productivity. "The stream ecosystem cannot depend on an Arctic air mass moving in every year, killing the leaves and exposing the stream to sunlight, resulting in increased growth," Mulholland said. "It's an unpredictable weather occurrence. On the oth...

Ethiopian government celebrates rinderpest eradication

...used to eradicate rinderpest in other African countries including Uganda, Sudan, and Kenya. Rinderpest surfaced in Africa in colonial times, initially killing up to 90 percent of the cattle population in Ethiopia, where an estimated one-third of the human population starved to death. In the years that follow...

Munich researchers discover new target for tailored antibiotics

... "we have a new angle of attack for developing substances that block the terminal step in the bacterial synthesis of isoprene building blocks, thereby killing pathogens in a very targeted way. Since the enzyme and the associated reaction do not appear in mammals, these compounds should have few or no side ef...

LSUHSC's Kolls awarded $1.8 million to improve vaccine strategies for P. carinii pneumonia

...nse repertoire to the Pneumocystis fungus, but also that when combined with a potent protein antigen called Kex1, these antibodies can regulate direct killing of the fungus and confer immunity. "Understanding these antibody responses will improve vaccine strategies for this human infection," notes Dr. Jay...

Biological warfare in bacteria offers hope for new antibiotics

... Scientists are to study a group of proteins that are highly effective at killing bacteria and which could hold the key to developing new types of antibiotics. Researchers from the Universities of York and Leeds have been awarded...

Singapore nanotechnology combats fatal brain infections

...h." The IBN research team has demonstrated that these engineered peptide nanoparticles have high antimicrobial activity and are highly effective in killing microbes. Additionally, the peptide nanoparticles are more powerful in inhibiting the growth of fungal infections than conventionally available an...

Norway, Japan prop up whaling industry with taxpayer money

... Japan provide commercial whalers with huge government subsidieseven though killing whales is unlikely to ever be profitable without taxpayer support. "In ...). Ahead of the 61st IWC meeting next week, researchers point out that killing more whales likely would hurt whale-watching and tourism, trade, and the in...

Researchers describe 'implausible' chemistry that produces herbicidal compound

...bacteria that produce PT. It allows the bacteria (which belong to the genus Streptomyces) to emit the antibiotic to kill off their competitors without killing themselves. Similarly, corn and other crops that contain the resistance gene are able to withstand PT-based herbicides that kill the weeds around them...

Fossil bone bed helps reconstruct life along California's ancient coastline

... bones from extinct seals and whales, seem to tell of a 15-million-year-old killing ground. Yet, new research by a team of paleontologists from the Universi...e battled over an obvious question: How did the bones get there? Was this a killing ground for megalodon, a 40-foot version of today's great white shark? Was i...

A quicker, cheaper SARS virus detector -- one easily customizable for other targets

...tein the prototype system detects is the SARS (severe acute respiratory syndrome) virus n-protein, which infected more than 8,000 people in 2002-2003, killing nearly 10 percent of them. Commercial systems using enzyme-linked immunosorbent assay (ELISA) now exist to test for SARS, but the new system has ...

TB -- hiding in plain sight

...nism associated with the development of clinical disease at the site of infection in human TB. They found that while the immune cells responsible for killing the tuberculosis bacteria surrounded the granuloma, these cells had low levels of the molecules necessary to kill the TB. Instead, granulomas had hig...

Mosquito parasite may help fight dengue fever

...form of defence. Knowing that a parasite, Wolbachia pipientis , shortens the lifespan of host insects and could restrict dengue fever transmission by killing the insects before they can pass the infection on, O'Neill and his team successfully infected Ae. aegypti with a strain of the Wolbachia bacterium a...

New technology shows promise against resistant staph infections

...nd microbiology & immunology at Einstein. NO is produced by many cells throughout the body and has several important biological functions including killing bacteria, healing wounds, and increasing blood flow by dilating blood vessels. But harnessing NO's therapeutic potential has proven difficult. "The pr...

Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes

... REVEAL SICK STRUCTURES In 2006, a concrete panel weighing several thousand pounds fell onto traffic in Boston's Big Dig tunnel, crushing a car and killing a motorist. The alleged cause -- and subject of a multi-million dollar settlement -- was faulty epoxy that allowed bolts in the ceiling to wiggle loos...

American Chemical Society Weekly PressPac -- April 15, 2009

...e hard-to-treat diseases include leishmaniasis, sleeping sickness, and Chagas disease. These conditions infect millions of people worldwide each year, killing thousands. An article on this development is scheduled for the April 20 issue of Chemical & Engineering News , ACS' weekly newsmagazine. C&EN seni...

Indigenous peoples at world summit to share climate change observations, coping techniques

...son could be cut in half should the loss of glaciers continue and agriculture become dependent solely on rainfall; Kenya: Protracted droughts are killing livestock on which the Samburu People depend for food and economic survival; Nepal: Intense rainfall and droughts have become common, having severe...

NC State researchers find soy may aid in treating canine cancers

...so inhibit the growth of canine lymphoma cells. The researchers found that a commercially available form of genistein called GCP was effective in killing canine lymphoid cells in a laboratory setting, and that GCP is "bioavailable" in canines - meaning it is absorbed into the bloodstream where it can af...

Locking parasites in host cell could be new way to fight malaria

... form of human malaria. Each year, the Centers for Disease Control and Prevention report 350� million cases of malaria occur worldwide, killing more than a million people. In collaboration with the laboratory of Penn biologist David Roos, PhD, the work was broadened to include Toxoplasma gond...

Redefining what it means to be a prion

...ublic's mind by "mad cow" disease. In the late 1980s, an unidentified disease infected more than 100,000 British cows and spread to humans, eventually killing more than 200 people. The disease causes progressive degeneration of physical and mental abilities, which ultimately lead to death. Scientists foun...

Researchers examine bacterial rice diseases, search for genetic solutions

... world, particularly Southeast Asia. These bacteria damage rice by entering the plant and taking control of certain rice cell processes, eventually killing the rice cells. Pathovar oryzae does this in the vascular system of the plant, which typically allows the bacterium to spread faster and cause more da...

Distinguishing single cells with nothing but light

... marker can affect dynamic cell activities, like membrane transport. And internal markers actually involve punching holes in the membrane, damaging or killing the cell in the process. "Our method uses only light to effectively reach inside the cell," says Smith. "We can classify internal differences in th...

New drug agent knocks out multiple enzymes in cancer pathway

...ancer agent that is about 200 times more active in killing tumor cells than similar drugs used in recent clin...nzymes appears to be a more effective strategy for killing cancer cells. When used in combination with hor...une cells called gamma delta T-cells, which aid in killing tumor cells. "The new drugs are about 200 times...

Metastatic bone disease patients can walk in Lazarus' footsteps

..., interventional radiologists may also use radiofrequency ablation (RFA) or cryoablation. These treatments use heat or cold to desensitize the bone by killing the nerve endings in the vicinity of the metastasis. Once the nerve endings are dead, interventional radiologists can perform osteoplasty. Osteoplasty...

Amazon carbon sink threatened by drought

...ear study, published today in Science , provides the first solid evidence that drought causes massive carbon loss in tropical forests, mainly through killing trees. "For years the Amazon forest has been helping to slow down climate change. But relying on this subsidy from nature is extremely dangerous...

Danger lurks underground for oak seedlings

...southern Indiana who has studied oak mortality issues. Rathfon found in 2006 that animals, later determined to be pine voles, had been responsible for killing at least 19 percent of the dead oak seedlings observed in his study area. He said the voles, which are common to eastern deciduous forests, were likel...
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