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A new application of a chemical process called sol-gel technology shows promise for making automobile catalytic converters dramatically more efficient in reducing harmful air pollution emissions, by targeting the first minute-and-a-half in which your car is running after a cold start, according to research presented here today at a national meeting of the American Chemical Society. Embargoed for 9-9-97, 1 PM EDT
Chemist and former U.S. Department of Commerce Undersecretary Mary L. Good, Ph.D., will address a historic gathering of women chemists at the national meeting of the world's largest scientific society, the American Chemical Society, in Las Vegas Sept. 9. To honor 70 years of actions by the Society's Women Chemists Committee, Dr. Good, a past president of the Society, will speak on the historic and future challenges faced by women chemists as they enter the 21st century.
Drinkers of some espresso coffees who like a lot of foam can't be fussy about how quickly the foam disappears. That's because you can't have ultimate foaming and long-lasting foam at the same time, according to Dr. Manuel A. Coimbra and his student Fernando Nunes of the University of Aveiro in Portugal.
A vast range of scientific research results will be available faster than ever before when - for the first time - the world's largest scientific society makes its entire collection of 26 prestigious research journals available via the Internet next month.
Washington, D.C., July 24 -- Four high school chemistry students, representing the USA in the 29th International Chemistry Olympiad, returned home from Montreal, Canada, with four medals-- and one California student earns the highest finish ever for a U.S. student.
Montreal, July 13 -- More than 175 of the world's top high school chemistry students arrive here today for the 29th annual International Chemistry Olympiad, which runs through July 21st. The Olympians, who represent 47 countries, will attempt laboratory experiments and a rigorous exam designed at a level that would challenge most second or third-year college students
Frozen concentrated orange juice generally has the highest vitamin C levels compared to other commercial orange and grapefruit juice products, but even if you favor one of the others, you're probably still getting your daily requirement of the vitamin. That's according to a new, ten-year study reported in the July 16 issue of the American Chemical Society's Journal of Agricultural and Food Chemistry.
Nuclear waste disposal, risks from food impurities and potential flu treatments are among the topics that will be discussed at the 214th American Chemical Society national meeting here September 7-11. Approximately 10,000 registrants are expected to gather for about 400 technical sessions to be held in the Las Vegas Convention Center, the Las Vegas Hilton, and the Stardust hotel.
The heady odor of jasmine flowers is enough to give some people headaches and nausea. But there is a way to tame the aggressive perfume of jasmine and other blooms, according to research described in the June 16 issue of the American Chemical Society's Journal of Agricultural & Food Chemistry.
Scientists are celebrating the 100th anniversary of the discovery of the electron this year. Detection of this enigmatic particle -- which still has not surrendered all its secrets to modern researchers -- helped lift society up from its agrarian roots and permitted the development of such modern-day devices as microwave ovens, semiconductors, television and lasers, according to an article in the June 16 issue of Chemical & Engineering News (C&EN), the American Chemical Society's weekly news magazine.
According to work being presented here at the American Chemical Society national meeting by Mark Knize of Lawrence Livermore National Laboratory, marinating chicken before it's grilled reduces the levels of some potentially cancer-causing compounds formed while cooking.
Methyl-t-butyl ether (MTBE) has been added to gasoline in many areas of the United States, but its environmental impact has not yet been fully assessed.
Which Italian wines have the most health-boosting antioxidants?
There are two ways to approach the treatment of obesity, a condition that affects approximately one in three Americans," according to Dr. Robert Dow, principal research investigator with Pfizer Inc, "Either you inhibit food intake, or you improve energy expenditure to get the 'exercise effect.'"
The familiar RDA (recommended dietary allowance) numbers that are the basis for nutrition labels are under review and may be revised.
The aroma of brewed coffee could have some of the same beneficial health effects that you get from eating fruits and vegetables, according to Dr. Takayuki Shibamoto of the University of California, Davis.
Zapping a cancer patient's tumor with ultrasound increases the tumor's vulnerability to chemotherapy, according to Dr. Mark Bednarski, a visiting professor/scholar at Stanford University School of Medicine,
Dr. Jeffrey L. Cleland and his colleagues at Genentech in San Francisco say they are the first to develop an alternative to current vaccination practices by providing all the needed immunizations in a single shot.
A material with fuel potential ten times greater than all known coal, gas, and oil reserves on the planet lies deep within the oceans or in the permafrost of the arctic tundra, according to Dr. Timothy S. Collett of the United States Geological Survey
Parkinson's disease may be reversible if a drug that has worked in animal tests is as successful in humans.
Should the U.S. continue to support scientists from the former Soviet Union to keep them from selling their expertise to forces hostile to the U.S.? The cost and utility of this support is explored in an article in the April 7 issue of Chemical & Engineering News
The search for potential pharmaceuticals derived from indigenous natural medicines -- marred in the bad old days by exploitation of local Third-World populations -- has now been refined to funnel significant benefits to these groups.
Mutagens have long been known to be present in urban air, but their detection and potency has mostly been measured with a bacterial test. However, extrapolating the observed mutagenic effects from bacteria to humans continually leads to questions about the relevance of bacterial assays. New research represents the first time a human cell mutation assay has been applied to an atmospheric particle monitoring network.
The catalytic converter in your automobile may be removing most of the air pollutants in the car's exhaust gases, but it is also emitting a fine dust containing platinum, a precious metal that is the key ingredient in making the converter effective in controlling air pollution, according to Dr. R. R. Barefoot of the University of Toronto.
The hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) used to replace the chlorofluorocarbons (CFCs) banned by the Montreal Protocol have low or no potential to deplete ozone in the stratosphere, but they may contribute to climatic change, says Dr. Garry D. Hayman of the National Environmental Technology Centre in Oxfordshire, United Kingdom.
The commonly used methods for measuring the efficiency of soil to remove viruses from human waste may be providing inaccurate and misleading information about virus retention and transport in the subsurface, says Dr. Yan Jin of the University of Delaware.
Americans who avoid red meat may not be getting enough iron in their diet, according to research reported in the January issue of the American Chemical Society's Journal of Agricultural & Food Chemistry, due to be published on Jan. 20.
Women who take estrogen-replacement therapy after menopause often also take progestin to avoid an increased risk of endometrial cancer. But progestin itself has a number of side-effects, including resumption of menses and central nervous system disturbances. And estrogen replacement therapy is also associated with increased breast cancer risk, according to Dr. Timothy Grese of Eli Lilly and Co. in Indianapolis.
Like beta-carotene, antioxidants such as vitamins C and E are thought to prevent cancer and other diseases. But researchers have been puzzled by the apparent link between beta-carotene and an increased risk of lung cancer in heavy smokers, as reported recently in the New England Journal of Medicine. Research to be published in the Jan. 22 issue of the Journal of the American Chemical Society appears to clear up this mystery.
The plastic bottle you throw in the recycling bin today may be in your gas tank tomorrow. That type of reclamation of waste material is now possible, according to Dr. Joseph Shabtai of the University of Utah. The results of his work appear in the January/February issue of Energy & Fuels, a bimonthly publication of the American Chemical Society.
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