• acid
  • The Cabinet Council on Natural Resources and the Environment is considering a number of acid rain control options, ranging from a small $10 million-a-year research and lake-treatment program, to legislation requiring large cuts in sulfur-dioxide emissions across 48 states - a move that could cost $7 billion annually by 1993. (csmonitor.com)
  • Title IV of the 1990 Clean Air Act established the allowance market system known today as the Acid Rain Program. (wikipedia.org)
  • In the years prior to 1985, several publications reported the scientific consensus that acid rain emitted by coal-fired electricity generation plants belching sulfur dioxide was destroying vast swathes of forests and lakes in the eastern United States. (catallaxyfiles.com)
  • In the US, a 10-year government-sponsored study involving some 700 scientists and costing about $500 million reported in 1990 that "there is no evidence of a general or unusual decline of forests in the United States and Canada due to acid rain" and "there is no case of forest decline in which acidic deposition is known to be a predominant cause. (catallaxyfiles.com)
  • world's
  • After lobbying in the 1960s and 1970s for such a system to be built, Spitzer's vision ultimately materialized into the world's first space-based optical telescope, Hubble Space Telescope, which was launched on April 20, 1990 by the Space Shuttle Discovery (STS-31). (wikipedia.org)
  • Caribbean
  • The element has traditionally been spelled sulphur in the United Kingdom, most of the Commonwealth including India, Malaysia, South Africa and Hong Kong, along with the rest of the Caribbean and Ireland, but sulfur in the United States, while both spellings are used in Australia, New Zealand and Canada. (eternal-lands.com)
  • 2000
  • IUPAC adopted the spelling "sulfur" in 1990, as did the Royal Society of Chemistry Nomenclature Committee in 1992 and the Qualifications and Curriculum Authority for England and Wales recommended its use in 2000. (eternal-lands.com)
  • carbon
  • Sulfur is insoluble in water but soluble in carbon disulfide and, to a lesser extent, in other nonpolar organic solvents, such as benzene and toluene. (wikipedia.org)
  • protein
  • After processing the cleaved leader sequence of the iron-sulfur protein is retained as subunit 9, giving 11 subunits from 10 genes. (wikipedia.org)
  • primary
  • 34 S value of primary anhydrite places constraints on the sulfur isotopic composition of SO 2 gas resulting from the eruptions. (usgs.gov)
  • If, instead, most of the SO 2 was generated by rapid irreversible breakdown of anhydrite during ascent decompression and eruption, then the sulfur isotopic composition of the total eruption and the erupted SO 2 would have been similar to that of the primary anhydrite, 7 per mil. (usgs.gov)
  • Nutrition
  • Herschbach C (2003) Whole plant regulation of sulfur nutrition of deciduous trees - influences of the environment. (springer.com)
  • known
  • Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and Egypt. (wikipedia.org)
  • Sulfur forms polyatomic molecules with different chemical formulas, the best-known allotrope being octasulfur, cyclo-S8. (wikipedia.org)
  • total
  • Context & Challenges How to analyze H2S, mercaptans and/or THT for detecting the odor of the gas with the ability to have total organic sulfur calculation in a metering station? (environmental-expert.com)
  • Given estimates that a significant amount of the total sulfur in the eruption was present as a gas phase prior to eruption, the bulk sulfur isotopic composition of the eruption (crystals + melt + gas) would have been 5.0 to 6.5 per mil. (usgs.gov)
  • lower
  • Between its melting and boiling temperatures, octasulfur changes its allotrope again, turning from β-octasulfur to γ-sulfur, again accompanied by a lower density but increased viscosity due to the formation of polymers. (wikipedia.org)
  • found
  • Though sometimes found in pure, native form, sulfur usually occurs as sulfide and sulfate minerals. (wikipedia.org)
  • almost
  • Today, almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum. (wikipedia.org)