نتایج جستجو برای: organo sulfur compounds

تعداد نتایج: 256276  

Journal: :International journal of phytoremediation 2008
Juan Ramiro Pacheco Aguilar Juan José Peña Cabriales María Maldonado Vega

Wastewater from tanneries contains high concentrations of organic matter, chromium, nitrogen, and sulfur compounds. In this study, an artificial wetland is is used as the tertiary treatment in a tannery in León Gto., México. It consists of three subplots with an area of about 450 m2. Two subplots were planted with Typha sp. and the third with Scirpus americanus. Geochemical analyses along the f...

2013
João Filipe Menino Margarida Saraiva Jéssica Gomes-Rezende Mark Sturme Jorge Pedrosa António Gil Castro Paula Ludovico Gustavo H. Goldman Fernando Rodrigues

Conidia/mycelium-to-yeast transition of Paracoccidioidesbrasiliensis is a critical step for the establishment of paracoccidioidomycosis, a systemic mycosis endemic in Latin America. Thus, knowledge of the factors that mediate this transition is of major importance for the design of intervention strategies. So far, the only known pre-requisites for the accomplishment of the morphological transit...

Farahnaz Eghbali Mohammad Reza Ehsani,

Sulfur emission from coal combustion presents many environmental problems. The techniques used to reduce the amount of sulfur in coal before combustion, include physical, chemical and biological processes.Biological processes based on degradation of sulfur compounds by microorganisms offer many advantages over the conventional physical and chemical processes. The processes are performed und...

2016
André Romualdo Lopes Agnes de Paula Scheer Guilherme Vaz Silva Carlos Itsuo Yamamoto Francisco H. dos Santos

Removal of sulfur and nitrogen compounds from national commercial diesel through adsorption onto activated carbon was studied. Brazilian commercial activated carbon samples (AC) were modified by acid oxidation and, alternatively, were impregnated with palladium chloride. Modified carbon samples showed a significant increase in the quantity of acid sites, particularly those AC submitted to impre...

Journal: :Applied and environmental microbiology 1996
A Schippers P Jozsa W Sand

In the case of pyrite bioleaching by Leptospirillum ferrooxidans, an organism without sulfur-oxidizing capacity, besides the production of tetra- and pentathionate, a considerable accumulation of elemental sulfur occurred. A similar result was obtained for chemical oxidation assays with acidic, sterile iron(III) ion-containing solutions. In the case of Thiobacillus ferrooxidans, only slight amo...

2017
Sylvester Holt Harish Kankipati Stijn De Graeve Griet Van Zeebroeck Maria R Foulquié-Moreno Stinus Lindgreen Johan M Thevelein

Sulfate is a well-established sulfur source for fungi; however, in soils sulfonates and sulfate esters, especially choline sulfate, are often much more prominent. Here we show that Saccharomyces cerevisiae YIL166C(SOA1) encodes an inorganic sulfur (sulfate, sulfite and thiosulfate) transporter that also catalyses sulfonate and choline sulfate uptake. Phylogenetic analysis of fungal SOA1 ortholo...

2004
Iqbal W. Siddiqi

A sensitive and accurate potentiometric reaction-rate method for the assay of peroxidase (EC 1.11.1.7) and peroxidase-coupled reactions is described. The technique is based on the peroxidase-catalyzed rupture of the covalent C-F bond in certain organo-fluoro compounds in the presence of H202 and the measurement of liberated F by a fluoride ion-selective electrode. In a study screening 26 organo...

Journal: :Journal of dairy science 2006
P A Vazquez-Landaverde J A Torres M C Qian

Volatile sulfur compounds have been reported to be responsible for the sulfurous off-flavors generated during the thermal processing of milk; however, their analysis has been a challenge due to their high reactivity, high volatility, and low sensory threshold. In this study, reactive thiols were stabilized and the volatile sulfur compounds in milk were extracted by headspace solid-phase microex...

The method of X-Ray Photo-electron Spectroscopy is used to determine the chemical state of the sulfur species present in fly-ash samples produced by burning a number of pulverized coal samples under reducing conditions in a continuous combustion furnace. The influence of submicron metallic constituents present in the flue-gases of the pyrometallurical systems on the state of the sulfur species ...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 1987

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