End Of World Population Growth Projected For 21st Century
...sume Today?" (ed. W. Lutz),just off press. "The biggest factor affecting population growth is the continuingdecline of fertility in most world regions," says Project Leader WolfgangLutz. Lutz says that as a whole, the world's population will probably increasefrom today's 5.8 billion to around 7.9 billion ...NCAR Scientist Models Earth's Climate and Vegetation Patterns At Last Glacial Peak
... tundra and polar desert in Alaska. Worldwide, the biggest vegetation changes occurred in central Asia, where needle-leaf evergreen spruces were replaced by needle-leaf deciduous larches. The Sahara expanded southward as the Asian monsoon weakened and drier conditions prevailed across Africa and Southest Asi...A Phoenix From A Ring Of Fire Is A Pattern For The Recovery Of Mount St. Helens
...ed to be moderately indifferent to the ash was my biggest surprise." Why the difference between the sites of the Washington and the Indonesian eruptions? The researcher's hypothesis is that the ash thrown up in the first days of an eruption is sharp and highly abrasive pumice -- basically powd...Project Shows Native Bacteria Can Destroy Widespread Pollutant In Groundwater
...oking for a site for a full-scale test. One of the biggest barriers they faced was the fact that they wanted to use toluene, which is itself a regulated compound. Unlike TCE, toluene is not carcinogenic, but drinking water standards specify a limit of one part per million. But at a fraction of that level -- ...Munching Microbes Make A Meal Out Of Toxic Substances
...; it's a nationwide problem," he says. "One of the biggest problems is that benzene is a constituent of gasoline, and benzene is known to cause leukemia." Nies and his students tested several sites in Indiana for the presence of microbes that eat benzoate, a chemical that is commonly found in soil and that i...Ozone 'Chat Room' Provides Real-Time Air-Quality Research
...put from others, least of which those who face the biggest sanctions. By building consensus beforehand, the stakeholders generally will agree to the basic principles of management decisions before they are implemented. "Second, the interactive Internet approach has altered the way environmental research ...Natural Shelters on Leaves House Plant Bodyguards
...on of the domatia atthat time appeared to have the biggest effect on populations of the big-eyedbugs and minute pirate bugs, both of which colonize later in the season.The populations of thrips, which colonize earlier in the growing season,did not appear to benefit as much from the addition of the domatia at...First Salmonella Vaccine For Poultry To Be On The Market Soon
...e oral vaccine is 'dirt cheap' in comparison. The biggest costs with the oral vaccine are the glass vials and labels. The vials for the salmonella vaccine will hold between five and ten thousand doses, each dose costing less than a penny per bird." The vaccine also can be delivered quite effectively as an ...... genes in commercial plants likerice - the world's biggest crop, and the staple diet for billions of peopleglobally. "In most crop plants, the male parts of the flower transfer pollento the female parts, prompting the grain to develop," Dr Chaudhurysaid. "But we are aiming to produce grain without the need...Research Finds Alligator Problems Also Evident In Less Polluted Lakes
... Preliminary tests on Lake Okeechobee, Florida's biggest lake, showed the research team many of the same problems it had seen before: lower testosterone levels and small penis size in male alligators. In addition, tests also showed a new problem: altered thyroid hormone levels. The results are scheduled t...Cancer Cells Self-Destruct When "Sweet Tooth" Is Thwarted
...tive to glucose deprivation." One of the biggest obstacles to using a sugar-starvation treatment incancer patients, according to Dang, is that central nervous system cells can't function properlywithout glucose. "The brain is the only important organ that depends on glucose, so we needa drug t...New Sensor Will Detech Chemical And Biological Pathogens At Incredibly Small Doses
...s, drug discovery,and process control. "One of the biggest applications will be in drug discovery work," Murphy says.It can take six to nine months to screen libraries of new chemicals, but withthe new sensor, configured in an array of 100 fibers, a determination could bemade within a few weeks. A typical li...Recovery From Mass Extinction Is Unexpectedly Diverse
...implications for present-day ecosystems. One ofthe biggest problems facing biodiversity today is human-mediated invasions. Forexample, the marine communities of San Francisco Bay are dominated by aninvading clam from Asia, brought into the bay in the ballast water of ships. Ithas been thought that the degree...Rare Mutation Find May Offer Clues To Treating Osteoporosis
...e mychildren down there now as well." Her biggest concern is what to do about her son's teeth. "He's in the sixth grade, and that's a time when other children can becruel -- calling names and such," she said. "We are struggling to decide whatthe best options for him are physically, psycholog...Caribbean Lizards Evolve Independently
...nents, and that's reallyunique," said Losos. "The biggest surprise of our result is that it isopposite to a general trend in evolutionary biology in which evolutionproceeding in different areas or times lead to very different results." The study is part of a larger effort by Losos and colleagues ...Yale Announces New Biotech Firm
...lect the success of one or two inventions. Yale's biggest success isZerit, a leading HIV/AIDS medication developed by Bristol-Myers Squibb,"Gardiner said. On the market for only three years, Zerit recentlysurpassed AZT as the most frequently prescribed medication in a class ofdrugs called reverse transcrip...Keep Off The Grass - Reduce Air Pollution
...hat grasslands around the world may be one of the biggest sources of the gases methanol, and perhaps ethanol, in the atmosphere....Composting Livestock Waste Provides Benefits
...delivery of the application can be difficult. "The biggest advantage to composting is that it allows you to target when you apply it," Hawkins says. The compost material is an excellent soil conditioner. "Organic material stabilizes the soil aggregates," Hawkins says. "This is a very useful, beneficial mul......er questions will be addressed at what will be the biggest conference ever devotedexclusively to the science of acoustics: the Joint 16th International Congress on Acoustics (ICA) and the135th Meeting of the Acoustical Society of America (ASA), to be held June 20-26, 1998 at the SeattleSheraton Hotel and Tow...