Changing global nitrogen cycle impacting human health, says Colorado University-led study
...Earth's atmospheric gases, it must be converted to chemically usable forms like nitrate or ammonium. In the absence of humans, this happens during lightning strikes or more commonly through microbes. "The major global changes in the nitrogen cycle have occurred because humans now convert more nitrogen to such...Seaweed uses chemical warfare to fight microbes
...orted. They believe that further investigations of chemically mediated interactions between marine microbes and larger organisms are likely to reveal new molecules and mechanisms that enable marine plants and animals to persist despite intense microbial challenges, researchers wrote. Ecologically driven studie...Chemical in broccoli blocks growth of prostate cancer cells
...ormer graduate student in Bjeldanes' lab. "DIM is chemically different than Casodex, but it behaves similarly in how it blocks the effects of androgen," said Le, who received her PhD in molecular and biochemical nutrition in 2002. These latest findings appear to add new burnish for this class of chemicals that...Enzyme could overcome industrial bleaching waste problems
...(basic or alkaline) environment. Catalase enzymes chemically alter hydrogen peroxide into natural products wat...ons for dealing with the wastewater. Industry can chemically treat the water to break hydrogen peroxide down, but that practically cancels out the environmental ...Integration of nanotechnology with biology and medicine will result in major medical advances
... sequences in a process called "multiplexing." By chemically binding the quantum dots to particular genes and proteins, scientists including Dr. Nie are developing molecular nanoprobes to rapidly analyze biopsy tissue from cancer patients, to monitor the effectiveness of drug therapy, as scaffolding in tissue...Highlights of American Chemical Society's national meeting in New Orleans
...he U.S. Department of Agriculture have developed a chemically modified version of the edible oil that shows promise as a cleaner, renewable alternative to petroleum-based motor oil, while enhancing its protective properties. Other possible uses include hydraulic fluids and lubricants. ( AGRO 14 , Monday, March ...St. Jude researchers decipher structure, activity of enzyme key to biochemical pathways of life
...d target molecule. When the ubiquitin-like protein chemically modifies this molecule, the molecule triggers a specific cellular activity, such as cell division. The discovery of the structure of the E1 activating enzyme for NEDD8 helps explain the critical steps by which E1 links NEDD8 to its E2 escort. "Now ...Scientists find evidence for crucial root in the history of plant evolution
...ns out that biologically derived organic matter is chemically and structurally complex," Cody says. "This is a very nice tool to try to interrogate that complexity while obtaining chemical information."...A new class of catalysts will help boost production, quality of transportation fuels
...ition, the new catalysts are physically strong and chemically stable, as well as inexpensive to produce and regenerate. "The current research in our group at Virginia Tech involves understanding the mechanism of reaction of the catalysts as they remove the S and N pollutants," Oyama said. "This entails studyin...Pacific Northwest chemist wins national award for studies of biological systems
...lary liquid chromatography, tiny tubes packed with chemically sensitive "beads" that tease apart mixtures according to size, electrical charge and other molecular properties. Once separated, Smith and his research team analyze the various components with a powerful mass spectrometer. "We developed this techniqu...Diamond film may enable critical new sensors for bioterror
...iniature electronics and biology, which requires a chemically stable platform for biosensing. Such sensors, acco...doesn't care," Hamers says. "The diamond films are chemically durable and they are electrochemically durable." In a battlefield environment such as the ones U.S....Backstage with a command performer
...out, DNA -- that ticker tape of base pairings that chemically describes us -- joins combinatorial forces with an assembly of proteins, called histones. The proteins form an octomer, or group of eight, that, together with two loops of DNA thread, form a structure called a nucleosome. These nucleosomes look like ......chaos. Similar forms of chaos are also possible in chemically excitable media, such as for example, the famous periodic Belousov-Zhabotinsky reaction. In experimental investigations of this reaction, American scientist Arthur Winfree discovered the so-called rotating scroll waves in 1973. In its transversal cro...Fruit flies unlock Methuselah's secrets
...nd John Tower exploited this phenomenon by using a chemically controlled transposable element that acts as an accelerator of gene expression to find mutations that could make flies live longer. Crucially, they were able to turn this acceleration on an off by feeding the flies a specific chemical and to look at ...Scripps scientists discover rich medical drug resource in deep ocean sediments
...rials that are highly biologically active and very chemically unique. This is likely to be the tip of the iceberg of diverse chemical formulas that are out there," said Fenical. Although more than 100 drugs today exist from terrestrial microorganisms, including penicillin, arguably the most important drug in...Expanding the genetic code--TSRI scientists synthesize 21-amino-acid bacterium
...ence and medicine because it enables scientists to chemically manipulate the proteins that an organism produces within the organism itself. This gives scientists a powerful tool for research, from determining molecular structures to creating molecular medicines. Why Expand the Genetic Code? Life as we know it...'Moss in space' project to test how plants grow 'up'
...the experiments are completed, the astronauts will chemically preserve the moss containers before returning to Earth. Upon landing, the Ohio State research team will take thousands of microscope pictures for later study. This r...UT Southwestern researchers develop new model for understanding obesity, diabetes
... produce energy), and when the chain was inhibited chemically in the worms or a mammalian fat-cell model, fat accumulation was markedly reduced. Gene mutations in the mitochondrial respiratory chain already have been linked to abnormalities in fat accumulation in humans, including lipodystrophy (a metabolic dis...Chemicals used to protect soldiers in 1991 Gulf War can damage testes, animal studies show
...iers with maximum protection and the least risk of chemically induced injury." Duke colleagues Hagir B. Suliman, Ph.D., Wasiuddin A. Khan, Ph.D., and Ali A. Abdel-Rahman were co-authors of the paper....Science's top ten: Discovery of genes' 'control switches' named top advance of 2002
...dies this month confirmed that melanopsin responds chemically to light, though other compounds may be involved. Sharpened View of Space: New technology erased the blurring effect of Earth's atmosphere on telescopes' view of the heavens in 2002. The result, enabled by the flexing of thin mirrors hundred of tim...