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Tag: "harmful" at biology news

Exposure to dioxins influences male reproductive system, study of Vietnam veterans concludes

...strued that a decrease in the risk of BPH is not a harmful effect, but the larger picture is that dioxins are affecting the normal growth and development of the reproductive system. Moreover, several effective treatments are available for BPH and thus reduction of BPH by a toxic compound is not a desirable e...

Nano-devices hold promise for early-stage cancer detection

...n early development stages. They will also detect harmful pathogens in food and water. Engineering researchers at McMaster University will be escalating efforts to develop these micro- and nanotechnology-based bio-sensors and imaging devices through the support of a recently announced $4.25 million grant f...

New research to cut animal testing

...ting on live animals to establish whether they are harmful or not. Dr Richard Walmsley and colleagues at the University spin-out company he founded, Gentronix, have developed techniques using cultured human cells to more effectively weed out cancer-causing compounds. "The current pre-animal tests that ar...

U-M researchers use nanoparticles to target brain cancer

...because of the blood-brain barrier, which prevents harmful substances from traveling through the bloodstream into the brain. In order for chemotherapy to treat a tumor, it must penetrate this barrier. Researchers tested the nanoparticles in cell cultures and animal models. The studies showed the nanopart...

Did 'ABCs' cause Uganda's fall in HIV rates?

...to the question of whether the ABCs are helpful or harmful in the battle to control the HIV pandemic. Elaine Murphy and Margaret Green (George Washington University School of Public Health and Health Services) argue that "ABC behaviors were attainable in Uganda" and the promotion of ABC messages was "except...

New sunscreen ingredient to heal sunburn and help prevent skin cancer

...ed by the iron - and also prevents the build up of harmful sunlight-generated free radicals, which can lead t...on can act as catalysts for the generation of more harmful free radicals that cause severe cell damage. "Many forms of cancer are thought to be the result o...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

...brought together, the plasmid carrying them became harmful by over-replicating within the bacterium, ultimate...even though typically when bacteria are exposed to harmful agents like antibiotics, resistant strains emerge. Nothing with the killer plasmid survived." The...

A silent pandemic: Industrial chemicals are impairing the brain development of children worldwide

...ercury toxicity, $8.7 billion each year. "Other harmful consequences from lead exposure include shortened attention spans, slowed motor coordination and heightened aggressiveness, which can lead to problems in school and diminished economic productivity as an adult. And the consequences of childhood neuro...

Scientists discover way to block growth of prostate cancer cells

...ich the sex hormone, androgen, increases levels of harmful chemicals called reactive oxygen species (ROS) in the prostate gland that play a role in the development of prostate cancer. They found that a drug that blocks this pathway significantly prolonged survival and inhibited tumour development in mice th...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

...fluenza infection rates to such an extent that the harmful infection becomes a vaccine against that very form...t of an influenza infection to such an extent that harmful infections are transformed into a vaccine against that form of influenza. 'Protecting virus' has a...

Male contraception: One door opens, another closes

...only much higher doses are effective--but they are harmful to the body's organs. Dr. Diana Blithe of the U.S. National Institutes of Health, a long-time funder of the Adjudin research, says that "This [new breakthrough] is what they were looking for and it looks like it's working." The next step is to...

The effects of smoking on fractures and ligament injuries

...esses annually in the U.S., has been shown to have harmful effects on a variety of orthopedic conditions. Studies have shown that the numerous toxins contained in cigarette smoke can undermine fracture and ligament repair following injury. In addition, smokers have higher rates of hip fracture, fracture heal...

Record ozone loss during 2006 over South Pole

... as a sunlight filter shielding life on Earth from harmful ultraviolet rays. Over the last decade the ozone level has lowered by about 0,3% per year on a global scale, increasing the risk of skin cancer, cataracts and harm to marine life. The thinning of the ozone is caused by the presence of pollutants i...

By 2048 all current fish, seafood species projected to collapse

... appeared to increase the risks of beach closures, harmful algal blooms (red tide, for example), oxygen depletion, fish kills and coastal flooding. "The good news is that it is not too late to turn things around," Worm said. The scientists studied 48 areas worldwide that have been protected to improve mari...

New UD technology removes viruses from drinking water

...sive, nonchlorine-based technology that can remove harmful microorganisms, including viruses, from drinking water. UD's patented technology, developed jointly by researchers in the College of Agriculture and Natural Resources and the College of Engineering, incorporates highly reactive iron in the filterin...

New research shows why too much memory may be a bad thing

...wth of too many new neurons could actually be more harmful than helpful to working memory. To examine this hypothesis, they designed working memory tests for two independent groups of mice in which neurogenesis in the hippocampus regions was suppressed. Results of the tests, in which mice had to locate food ...

Common parasitic infection leads to increased risk for HIV infection

...cing vaginal infections and addressing potentially harmful intravaginal practices such as douching, washing, or placing traditional substances in the vagina should be developed and evaluated in clinical trials as possible female-controlled HIV prevention interventions." ...

Scientists identify specific enzymes that make meningitis hard to fight

...rulent meningitis bacteria are able to repair this harmful damage and are therefore unaffected by the body's defences. The research team found that the two enzymes essential to the bacteria's repair mechanism are AP endonuclease and 3'-phosphodiesterase. Contrary to the scientists' expectations, these two...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

...llutant in itself, but also increase the amount of harmful particulate matter in indoor air." High levels of airborne particles can aggravate asthma and cardiovascular problems, and have been linked to higher death and lung cancer rates. Excess ozone can damage the lungs, causing chest pain, coughing, sho...

Targeting tumors the natural way

...y for cancer but also for other diseases involving harmful cells." Cancer cells typically display higher levels of certain receptors on their surfaces than do normal cells, a fact that allows scientists to pinpoint tumor cells lurking among the body's scores of cell types. A popular approach employs a cell...

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