Microbes at work cleaning up the environment
...rmation of densely aggregated nanoparticulate zinc sulfide spheroids. They also studied whether various amino acids induce rapid aggregation in metal-sulfide nanoparticles. The answer was yes in both cases. This demonstrates an extracellular biomineralization mechanism that is unexpected because it in...In nature, proteins sweep up nanoparticles
... The research team analyzed a biofilm rich in zinc sulfide that was collected from the water-filled mine. The sulfide is a metabolic waste product of bacteria that thrive in the oxygen-free mine. Once the sulfide is re...Scientists uncover link between ocean's chemical processes and microscopic floating plants
...own." During the study, concentrations of dimethyl sulfide (DMS) and chloroiodomethane, produced by phytoplankton in ocean water, were measured. "In the atmosphere, DMS is rapidly oxidized to sulfur dioxide, which can form sulfate aerosols in the atmosphere," said Wingenter. These aerosols can act as nuclei ...Deep in the ocean, a clam that acts like a plant
...iotic bacteria to use energy locked up in hydrogen sulfide to replace sunlight. Now, the genome of this symbi...billions of years ago. "The energy from hydrogen sulfide is used to drive carbon fixation in much the same way that chloroplasts carry out carbon fixation," ...Shotgun sequencing finds nanoorganisms
...ess create sulfuric acid and dissolve pyrite (iron sulfide or fool's gold) to release more iron and sulfur. This self-sustaining process creates the acidic drainage that pollutes creeks and rivers, including those around the researchers' study site, the Richmond Mine at Iron Mountain, Calif. The mine is one ...Researchers link ocean organisms with increased cloud cover and potential climate change
...Researchers had previously theorized that dimethyl sulfide (DMS) which is also emitted by phytoplankton affects the formation of clouds by increasing the number of sulfate particles, which can absorb moisture and form cloud droplets. When oxidized, isoprene may enhance the effect of DMS by increasing the ...ACS News Service Weekly PressPac -- Oct. 25, 2006
...e paint, which used pigment made from red mercuric sulfide (called Cinnabar, HgS), was preserved under ash until excavations began in 1988. Since the 1990s, however, the brilliant red paintings have darkened and deteriorated. In a report scheduled for the Nov. 1 issue of the ACS semi-monthly journal Analyti...Mass extinction's cause: 'Sick Earth'
...ation of sulfur isotopes that support the hydrogen sulfide theory....'Sewer gas' induces suspended animation without decreasing blood pressure
VIRGINIA BEACH, VA (October 9, 2006) -- Hydrogen sulfide gas can induce a state of suspended animation in m...day help treat critically-ill patients. Hydrogen sulfide gas, sometimes called sewer gas, produces a noxious odor often described as a rotten egg smell. The ...ACS News Service Weekly PressPac -- September 27, 2006
...s hair black without damaging the hair. The lead sulfide crystals look much like the lead sulfide quantum dots synthesized recently using techniques from materials science, they state. "In contrast ...Ocean seep mollusks may share evolutionary history with other deep-sea creatures
...old seeps are places where fluids rich in hydrogen sulfide and methane leak up through the ocean floor, creat...mical environment where hardy bacteria process the sulfide and methane. Seep fluids are about the same temperature as surrounding waters, but similar chemicall...At an underwater volcano, evidence of man's environmental impact
...est hydrothermal vents, spew dark-looking iron and sulfide particles as they shoot up through seawater. Found throughout the world's oceans, many vents even harbor eyeless shrimp, giant clams and other fauna rarely seen elsewhere. Most of these underwater geysers lie far from land thousands of feet below t...What lies beneath: LSU researchers explore Gulf floor
...e organisms include bacteria that feed on hydrogen sulfide gas, a by-product of the oil and gas seepage; tube worms, mussels and clams that serve as hosts to those bacteria; and shrimp, crabs, fish, snails and starfish that, in turn, feed on the worms, mussels and clams. These animal communities are unique ...Embryos tell story of Earth's earliest animals
...die and also inhibit voracious bacteria. Hydrogen sulfide is known to have been present in the environment h...'s gold") is found in the fossils. Today, hydrogen sulfide exists in significant concentrations at the bottom of the ocean, especially in the vicinity of deep ...Novel protein complex enables survival in hostile environment
...ble to tolerate sulfite. "Early earth had a lot of sulfide but no oxygen until about 2.7 billion years ago. T..., the reaction of the small amounts of oxygen with sulfide would have produced an incomplete oxidation product sulfite," he said. "Methanogens present during ...UCR environmental scientists propose chemical solution to cleaning California's Salton Sea
...er, because of low dissolved oxygen, high hydrogen sulfide and ammonia concentrations, high temperatures and an increasing level of salinity. Due to noxious odors emanating from the Salton Sea, a 32 kilometer-long State Recreation Area on the northeast shore remains under-used. "The Salton Sea at one time at...Activation of thermoreceptors mediates raw garlic's burning pungency
...nd tongue. The researchers went on to identify the sulfide compound allicin, an unstable chemical found in br.... Allicin is converted to a variety of more stable sulfide compounds over time or with heating, in correspondence with the significantly milder taste of roaste...Microbes yield secrets of survival
...gy from iron that has been leached out of the iron sulfide rock, also known as pyrite or "fool's gold." The researchers used an analytical technique called mass spectrometry to identify the proteins present in the biofilm, then correlated them with genes from each of the major organisms identified in the ear...Buying time through 'hibernation on demand'
...activity. Within minutes of breathing the hydrogen sulfide and room-air cocktail, the mice stopped moving and...ation caused by exposure to gases such as hydrogen sulfide and carbon monoxide. Known as oxygen mimetics, these chemicals are very similar to oxygen at the mol...Hydrogen and methane provide raw energy for life at 'Lost City'
...t black-smoker vents. And there is little hydrogen sulfide and only very low traces of metals, on which many of the microbes at the other kind of vents depend. The difference in what's available is because water circulates through the Lost City hydrothermal vent field via serpentinization, a chemical reactio...