Results 251 to 260 of about 139,399 (305)

Elemental sulfur in sediments: analytical problems

Environmental Science and Pollution Research, 2016
In the paper, a modified method for elemental sulfur (S8) determining using gas chromatography coupled with mass spectrometry (GC-MS) is proposed with estimation of selected validation parameters. The aim of this work was a review of problems associated with the determination of S8 and selection of the most optimal conditions for S8 analysis with GC-MS.
Justyna, Rogowska, Joanna, Sychowska, Monika, Cieszynska-Semenowicz, Lidia, Wolska   +3 more
openaire   +2 more sources

ELEMENTAL SULFUR REACTIONS WITH 3-PICOLINE

Phosphorus, Sulfur, and Silicon and the Related Elements, 1991
A study of the reaction of the elemental sulfur with 3-picoline is reported. The process was carried out at the boiling point of the 3-picoline under argon. After removing unreacted solids, the reaction products were identified by means of LC, GC and GC-MS.
Edward Gleich, Zygmunt Warnke, Walter Schwarting   +2 more
openaire   +1 more source

ELEMENTAL SULFUR REACTIONS WITH 4-PICOLINE

Phosphorous and Sulfur and the Related Elements, 1986
A study of the reaction of the elemental sulfur with 4-picoline is reported. The process was carried out at the boiling point of the 4-picoline under argon. After removing unreacted solids, the reaction products were identified by means of LC, GC, and GC-MS. The following products have been identified: 1,2-di[4-pyridyl]-ethane, 1,2-di[4-pyridyl]-ethene,
E. Gleich, Z. Warnke, J. Szafranek, E. Malinski   +3 more
openaire   +1 more source

ELEMENTAL SULFUR REACTIONS WITH 2-PICOLINE

Phosphorus, Sulfur, and Silicon and the Related Elements, 1990
A study of the reaction of the elemental sulfur with 2-picoline is reported. The process was carried out at the boiling point of the 2-picoline under argon. After removing unreacted solids, the reaction products were identified by means of LC. GC and GC-MS. The following products have been identified by mass spectrometry: 1,2-di/2-pyridyl/-ethane.
Edward Gleich, Zygmunt Warnke
openaire   +1 more source

The Action of Sulfur Trioxide on Elemental Sulfur

Zeitschrift für anorganische und allgemeine Chemie, 1971
AbstractThe reaction between SO3 and elemental sulfur to form SO2 proceeds with maximum rate at 70°C, The decrease in rate at higher temperature is supposed to be due to the dissolution of SO3 in molten sulfur then its decomposition according to: SO3 → SO2 + 1/2 O2.
F. Habashi, R. Dugdale
openaire   +1 more source

ChemInform Abstract: Sulfuration of Dienes with Elemental Sulfur.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. Z. RYS, D. N. HARPP
openaire   +1 more source

Effect of Elemental Sulfur, Gypsum, and Elemental Sulfur Coated Fertilizers, on the Availability of Sulfur to Rice

Journal of Plant Nutrition, 2007
ABSTRACT Rice crops throughout the world are becoming increasingly affected by sulfur (S) deficiency as the use of S-free fertilizers increases. Sulfur additions, as coatings, to fertilizers such as urea (U), di-ammonium phosphate (DAP), mono-ammonium phosphate (MAP), and triple superphosphate (TSP) offer a way to introduce S back into these ...
Navida Yasmin, Graeme Blair, Ray Till
openaire   +1 more source

Autotrophic denitrification using elemental sulfur

Journal of Fermentation Technology, 1987
Abstract Experimental studies were conducted to determine the feasibility of autotrophic denitrification with Thiobacillus denitrificans as a nitrate removal process for wastewater. S0-acclimated activated sludge, which can carry out autotrophic denitrification using S0 as electron donors, was prepared by the fill and draw cultivation method.
Susumu Hashimoto, Kenji Furukawa, Masahiko Shioyama   +2 more
openaire   +1 more source

Denitrification of groundwater with elemental sulfur

Water Research, 2002
Autotrophic denitrification was studied in laboratory columns packed with granular elemental sulfur only and operated in an upflow mode. Soluble inorganic carbon, sodium bicarbonate, was supplied as source of carbon for microbial growth. Denitrification rates of up to 0.20 kg N removed m(-3) d(-1) were obtained at a hydraulic retention time of I h, and
openaire   +2 more sources

Elemental sulfur accumulation in pisolithus

Mycopathologia, 1975
Elemental sulfur was extracted from intact sporocarps of the ectomycorrhizal fungus Pisolithus tinctorius and identified by means of chemical analysis and crystallographic characterization using a petrographic microscope.
Jeannine Gill Muncie, Frederick M. Rothwell, William G. Kessel   +2 more
openaire   +1 more source