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Latest Chalcogens Stories

2009-06-23 15:35:00

Prairie dogs may seem like harmless little creatures, but they can inflict serious injury on plants simply by snacking on them. Plants cannot flee from their furry predators, so how do they avoid becoming a prairie dog's lunch?Dr. John Freeman and colleagues explore the role of metal hyperaccumulation in plant defense in the June 2009 issue of the American Journal of Botany. Certain plants species growing on soils with high metal content (such as arsenic, copper, selenium, and lead)...

2009-06-23 11:55:56

U.S. scientists studying chemical bonds have discovered such bonds do not necessarily break faster when they are stretched. Our findings contradict the intuitive notion that molecules are like rubber bands in that when we pull on a chemical bond, it should always break faster, said University of Illinois Professor Roman Boulatov, who led the study. When we stretch a sulfur-sulfur bond, for example, how fast it breaks depends on how the nearby atoms move. Boulatov said the findings also...

2009-06-17 15:08:22

From balloons to rubber bands, things always break faster when stretched. Or do they? University of Illinois scientists studying chemical bonds now have shown this isn't always the case, and their results may have profound implications for the stability of proteins to mechanical stress and the design of new high-tech polymers."Our findings contradict the intuitive notion that molecules are like rubber bands in that when we pull on a chemical bond, it should always break faster," said...

2009-05-15 15:00:00

CHENGDU, China, May 15 /PRNewswire-Asia-FirstCall/ -- The Board of Directors of Apollo Solar Energy, Inc., (OTC Bulletin Board: ASOE; "Apollo Solar Energy" or "the Company"), a leading vertically integrated miner and refiner of tellurium (Te) and high-purity tellurium based metals for specific segments of the global electronic materials market, today announced financial results for the first quarter ended March 31, 2009. Revenue for the first quarter of 2009 increased 21% to $2.3...

2009-05-12 07:00:00

CHENGDU, China, May 12 /PRNewswire-Asia-FirstCall/ -- Apollo Solar Energy, Inc., (OTC Bulletin Board: ASOE; "Apollo Solar Energy" or "the Company"), a leading vertically integrated miner, refiner and producer of tellurium (Te) and high-purity tellurium based metals for specific segments of the global electronic materials market, today announced that Behre Dolbear Asia, Inc. ("BDASIA"), a wholly-owned subsidiary of Behre Dolbear & Company, Inc. ("Behre Dolbear") of Denver, CO, issued...

2009-04-29 08:54:31

The recent deaths of 21 polo ponies in Florida was caused by an overdose of the mineral supplement selenium, Florida's state veterinarian says. Veterinarian Thomas J. Holt says toxicology results indicate the horses had as much as 15 times the normal amount of selenium in their blood and an even higher concentration in their livers, the South Florida Sun-Sentinel reported Wednesday Officials say now that they know what killed the polo ponies, investigators must determine how the overdose...

2009-04-17 11:14:53

Sedimentary rocks created more than 2.4 billion years ago sometimes have an unusual sulfur isotope composition thought to be caused by the action of ultra violet light on volcanically produced sulfur dioxide in an oxygen poor atmosphere. Now a team of geochemists can show an alternative origin for this isotopic composition that may point to an early, oxygen-rich atmosphere."The significance of this finding is that an abnormal isotope fractionation (of sulfur) may not be linked to the...

2009-04-16 15:05:10

U.S. researchers say a study of sedimentary rocks created more than 2.4 billion years ago suggests the Earth had an early, oxygen-rich atmosphere. Pennsylvania State University researcher Yumiko Watanabe said rocks sometimes have an unusual sulfur isotope composition thought to be caused by the action of ultra violet light on volcanically produced sulfur dioxide in an oxygen poor atmosphere. But the team of geochemists said they can show an alternative origin for that isotopic composition...

2009-04-15 07:30:00

CHENGDU, China, April 15 /PRNewswire-Asia-FirstCall/ -- The Board of Directors of Apollo Solar Energy, Inc., (OTC Bulletin Board: ASOE; "Apollo Solar Energy" or "the Company"), a leading vertically integrated miner, refiner and producer of tellurium (Te) and high-purity tellurium based metals for specific segments of the global electronic materials market, today announced financial results for the full year ended December 31, 2008. For the twelve months ended December 31, 2008, net...

2009-04-06 05:00:00

HOUSTON, April 6 /PRNewswire/ -- The International Fuel Quality Center (IFQC) has updated its ranking of the top 100 countries based on sulfur limits in gasoline; Germany and Japan remained first and second, respectively, with the lowest limits. "Sulfur reduction still remains a focal point in fuel quality improvement," said Liisa Kiuru, executive director, IFQC. "Even though some countries are already discussing low carbon fuels and other such measures, sulfur is still a key concern when it...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'