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Latest Acids Stories

2008-02-09 03:00:22

By Chow, Judith C Doraiswamy, Prakash; Watson, John G; Chen, L-W Antony; Ho, Steven Sai Hang; Sodeman, David A ABSTRACT Recent improvements in integrated and continuous PM^sub 2.5^ mass and chemical measurements from the Supersite program and related studies in the past decade are summarized. Analytical capabilities of the measurement methods, including accuracy, precision, interferences, minimum detectable levels, comparability, and data completeness are documented. Upstream denuders...

2007-10-30 06:00:34

By Bereket, G (Aldemir), S Pakdil; Ogretir, C In the present study the inhibitive behaviour of 1H-imidazole, 1- methyl imidazole, imidazolidin-2-one, 4-(imidazole-1- yl)acetophenone, 4-(imidazole-1-yl) phenol and L-hystidine on the corrosion of copper in 0.1 M HCl has been investigated by potentiodynamic polarisation and polarisation resistance techniques. Except for 2-imidazolidone, the tested imidazole derivatives were found to behave as cathodic inhibitors. 1-methyl imidazole, 4-...

2007-09-28 06:00:00

By Xiao, Yabing Ling, Jie; Qian, Shahua; Lin, Anqing; Et al ABSTRACT: A novel method of preconcentration of trace arsenite and arsenate by using titanium dioxide nanoparticles as adsorbent was described. The concentrations of preconcentrated arsenite and arsenate were determined by a silver diethyldithiocarbamate spectrophotometric method without desorption. Batch adsorption experiments were carried out as a function of the pH, contact time, amount of titanium dioxide nanoparticles, and...

2006-07-12 17:29:12

HOUSTON (Reuters) - At least 21 people were taken to hospitals after a chemical leak at a northeast Houston warehouse on Wednesday afternoon, according to Harris County Hazardous Materials spokesman. Over 200 people at the warehouse were checked for symptoms of exposure to hydrobromic acid, the spokesman said. The leak was caused by a forklift puncturing a drum of the substance. A Houston television station said the warehouse is owned by Nailor Industries, which the spokesman...

2006-01-25 18:18:04

By Timothy Gardner NEW YORK (Reuters) - U.S. environmental regulators on Wednesday asked DuPont Co., 3M Co. and six other companies to voluntarily eliminate almost all the releases of a potentially hazardous compound used in nonstick cookware. Under what it calls a global stewardship program, the Environmental Protection Agency asked producers of perfluorooctanoic acid, or PFOA, to slash emission and product levels of it by 95 percent by 2010, based on levels in 2000. The compound...

2006-01-25 14:55:51

NEW YORK (Reuters) - U.S. environmental regulators asked companies on Wednesday to voluntarily commit to reduce releases of a potentially hazardous compound used to make non-stick cookware by 95 percent by 2010. Under what it calls a global stewardship program, the Environmental Protection Agency is asking producers of perfluorooctanoic acid, or PFOA, to slash releases and levels of the compound in products by 95 percent, using 2000 as the basis year. It also encourages the...

2005-12-14 15:53:49

By Steve James NEW YORK (Reuters) - Chemicals maker DuPont Co. agreed on Wednesday to pay $16.5 million to settle with the U.S. Environmental Protection Agency over reporting data about a potentially hazardous compound used to make non-stick cookware. "This is the largest civil administrative penalty the EPA has every obtained under any environmental statute. Not by a little, by a lot," said Granta Nakayama, assistant administrator for the EPA Office of Enforcement and Compliance...

2005-12-14 10:57:40

NEW YORK (Reuters) - DuPont Co. said on Wednesday it has reached a settlement with the U.S. Environmental Protection Agency of an enforcement action related to the chemical compound perfluorooctanoic acid (PFOA). The agreement, subject to final approval by the EPA Environmental Appeals Board, would resolve four counts of reporting violations under the Toxic Substances Control Act and the Resource Conservation and Recovery Act filed in 2004, the Wilmington, Delaware-based chemical...

2005-11-07 14:40:42

CHAPEL HILL -- Sustained elevation of the suicide rate in a North Carolina county may be linked to releases of hydrogen sulfide and other airborne chemicals from a nearby paper mill and possibly other industrial sites, a new study led by a University of North Carolina at Chapel Hill psychiatrist indicates. The findings are being presented today (Nov. 7) to the 18th Annual U.S. Psychiatric and Mental Health Congress in Las Vegas. This is the second study to propose a possible link between...

2005-07-19 14:28:43

By Matt Daily HOUSTON (Reuters) - Two Florida law firms said on Tuesday they had filed class action lawsuits against DuPont Co., charging the giant chemicals producer hid the potential health hazards of its Teflon nonstick cookware coatings. The lawsuits, the first seeking class action status and lodged on behalf of consumers of Teflon against E.I. DuPont de Nemours Co., were filed by Kluger, Peretz, Kaplan & Berlin PL and Oppenheim Pilelsky PA in federal courts in several states. The...


Latest Acids Reference Libraries

0_ad99fed827882160f5c8221dfda576f1
2005-05-25 17:01:27

Sulfur (or Sulphur; see spelling below) is the chemical element in the periodic table that has the symbol S and atomic number 16. It is an abundant, tasteless, odorless, multivalent non-metal. Sulfur, in its native form, is a yellow crystaline solid. In nature, it can be found as the pure element or as sulfide and sulfate minerals. It is an essential element for life and is found in several amino acids. Its commercial uses are primarily in fertilizers but it is also widely used in gunpowder,...

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