Tag: "toxicity" at biology news

New Mechanism To Explain Carbon Monoxide Poisoning Identified

...onal viewexplains the mechanism of carbon-monoxide toxicity in only a small fraction ofall people exposed to i... the first time this mechanism of carbon- monoxide toxicity hasbeen demonstrated," states Thom. Everyday Exposures In earlier studies, Thom found that...

Popular 'Cure-All' Tea Can Cause Toxic Reactions

...s and the unethical aspects of testing the tea for toxicity in humans. The authors also urge that patients who experience unexplainablesymptoms and the physicians who treat them consider that those symptoms could beside effects from alternative therapies, such as drinking home-brewed Kombuchatea....

First Selenium-Based Orally-Active Antihypertensive May Lead To New Family Of Therapeutic Agents

...in the mid-1980s. Butconcerns about the potential toxicity of selenium and the availabilityof other blood pressure medications halted further development untilrecent reports highlighting selenium's potential importance promptedrenewed interest. "There are many kinds of antihypertensives on the market that a...

PEBBLEs Help U-M Scientists Open A Window On Cell Chemistry

...ncer therapy, glucose monitoring, drug or chemical toxicity testing, and all areas of biosensing. Kopelman says Clark has fabricated PEBBLEs as small as 20 nanometers in diameter. That's 100,000 times smaller than the letter "n" in this sentence. The tiny polymer spheres contain many surface pores. Whe...

Rapid Progress Reported On New Class Of Anti-Cancer Drugs

...pletetumor regression is observed, with no sign of toxicity in many animal models."Also, Casey said, in vitro studies had revealed that FTase inhibitors worked ona far broader range of human cancer cells -- about 40 percent of those tested --than was expected. Such broad action implies not only that Ras is ce...

Spinach Enzymes Neutralize Explosives

...ss (EBDP). It reduces dangerous explosives to low toxicity byproductsthatcan be used by industry or reduced further to harmless products such as carbon dioxide andwater. EBDP has been tested in the laboratory and soon will move to field-testing. The researchprojectis in its first year and will receive a tot...

Waste Asphalt Doesn't Pollute Groundwater, UF Researchers Say

...al to theEnvironmentalProtection Agency's standard toxicity test as well as tests aimed atmimicking outdoor conditions for pavement piles. In the EPA test, the researchers immersed the material in water-filledcontainers, then stirred the contents with a machine for several hours.Pollutants including h...

Fauci To Present New Insights Into HIV Latency At 12th World AIDS Conference

...AART. When a patientstops taking HAART because of toxicity or other reasons, or if HIV becomesresistant to the drugs, the virus almost inevitably comes roaring back becauselatently infected cells are awash in stimulatory factors in the normalenvironment of the lymph nodes," says Dr. Fauci. "These data under...

Monogamy Has Its Rewards For Flies

... After 34 generations, Holland measured the toxicity of the flies'seminal fluid by mating the males wit... "The next step is breaking apart the seminalfluid toxicity and looking for the specific genes involved." Author: Bob Holmes PLEASE MENTION NEW SCIENTIS...

Deliberate Self Harm Is An Overlooked Tragedy In The Developing World

...s for this high mortality in Sri Lanka is the high toxicity of the substances or poisons commonly used and the difficulties of treating them. Self poisoning with agricultural pesticides or natural poisons, such as oleander seeds, is an important cause of death in many rural areas. The authors believe that me...

New Research On Environmental Pollutants

...ls for examining the molecular mechanisms ofdioxin toxicity even in other animal groups. Like other vertebrates, fish haveso called Ah receptors, which are used to measure and understand the effects ofdioxins. Experiments with fish, to gain a better understanding of how thesereceptors convey information, can ...

Science Article Criticizes Federal Policy Regarding Lead Exposure And Children's Health

...h a scientifically based strategy toeliminate lead toxicity by controlling residential lead hazards." In an article titled The Paradox of Lead Poisoning Prevention, Dr. Lanphearargues that there are three paradoxes in proposed EPA standards. The first isthat the effects of lead exposure are largely irreversi...

Aspirin Decreases Genetic Mutations Associated With Inherited Colon Cancer

... already beenshown to harbor some gastrointestinal toxicity and liver toxicity, respectively."In the future, we would like to understand the specific mechanism and the exacttarget for the genetic suppression as well as minimize the toxicity," Dr. Fishelsays. "Not everyone can take aspirin. This has to be done...

New Anti-Microbial Agent Destroys Anthrax

...parts culture media," Hayes said. To determine its toxicity to animals, U-M scientists fed large amounts of BCTPto laboratory rats and injected mice with the material subcutaneously. Theanimals gained weight, remained healthy and suffered no adverse effects. To determine BCTP's effectiveness at treating anim...

New Contaminant Invades Arctic Air

...of them and hence more activity, and also toreduce toxicity of byproducts of dechlorination that inhibit furtherdechlorination," said Stephen Boyd, Ph.D., lead scientist for the study and aprofessor in MSU's Institute for Environmental Toxicology. "No one else hasever tried this approach," according to Boyd....

Did You Know? The Truth About The Poinsettia

...vice says that even at high doses of ingestion, no toxicity isindicated. However, keeping them away from pets or small children is still agood idea, since they will cause stomach aches if ingested....

Aircraft De-Icers Hold A Hidden Hazard

... theadditives are far more toxic than glycol. "The toxicity measures [of thede-icer] didn't match up with the known toxicity of the glycols themselves,"says Devon Cancilla of the Western Washington team. "When you start to te...

Researchers Discover Mechanism That Drives Daily Body Rhythms

...rtainmedications have greater efficiency and lower toxicity depending on what hourthey are given. "It's a whole area of circadian biology that is coming into itsown," Reppert says. For 25 years, scientists knew a master timepiece was lodged behind theeyes, in a structure called the suprachiasmatic nuc...

New Study By TSRI Scientists Sheds Light On Viral Clearance In Acute Hepatitis B Infection

...ion, they haveconsiderable limitations in terms of toxicity and long-term benefits. In this study, the authors demonstrate that the DNA of the Hepatitis B virusdisappears from the liver and the blood of acutely infected animals long beforethe onset of disease and the peak of T cell infiltration, suggesting th...

Breast Milk Of Women Who Eat Lake Ontario Fish Contains High Levels Of PCBs, UB Study Finds

... of eliminationfrom the body, different degrees of toxicity and, in many cases, differenttoxicological effects." The New York State Angler Cohort is composed of licensed anglers andtheir spouses or partners from 16 counties surrounding Lake Ontario, a total of10,517 men and 7,477 women who were betwee...

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