Reductive Dechlorination of α-, β-, δ-, and γ-Hexachlorocyclohexane Isomers by Hydroxocobalamin in the Presence of Either Dithiothreitol or Titanium(III) Citrate as Reducing Agents

2004 ◽  
Vol 38 (19) ◽  
pp. 5046-5052 ◽  
Author(s):  
B. Rodríguez-Garrido ◽  
M. Camps Arbestain ◽  
M. C. Monterroso ◽  
F. Macías
Keyword(s):  
Reductive Dechlorination ◽  
Reducing Agents ◽  
Hexachlorocyclohexane Isomers

Effects of selected reducing agents on microbiologically mediated reductive dechlorination of aroclor® 1242

1996 ◽  
Vol 15 (7) ◽  
pp. 1071-1082 ◽  
Author(s):  
Joseph J. McCue ◽  
Kennedy W. Gauger ◽  
Thomas H. Holsen ◽  
Robert L. Kelly ◽  
Daniel K. Cha
Keyword(s):  
Reductive Dechlorination ◽  
Reducing Agents

Effect of Cooking Utensil Composition and Contents on the Reductive Dechlorination of DDT to DDD

1971 ◽  
Vol 54 (6) ◽  
pp. 1352-1356
Author(s):  
Hiroko K Deloach ◽  
Delbert D Hemphill
Keyword(s):  
Stainless Steel ◽  
Iron Powder ◽  
Reductive Dechlorination ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Distilled Water ◽  
Progressive Loss ◽  
Cooking Utensil ◽  
Considerable Loss

Abstract The reductive dechlorination of DDT to DDD by some cooking utensil compositions and contents is demonstrated and the identification of specific reducing agents of DDT is investigated. Iron is found to be the most active reducing agent of DDT. A progressive loss of DDT and accumulation of DDD from DDT are observed when DDT standard is boiled with double-distilled water in metal utensils (iron, stainless steel, or aluminum) or in glass utensils containing iron powder. Non-metal utensils (Teflon, glass, or enamel) by themselves do not give an accumulation of DDD from DDT despite considerable loss of DDT. Teflon-coated utensils are ineffective in the reduction of DDT and tend to adsorb pesticides on their surface. A substance (or substances) which is present in vegetables also acts as a DDT-reducing agent as shown by boiling DDT with vegetables in glass utensils.

Reductive Dechlorination of α-, β-, γ-, and δ-Hexachlorocyclohexane Isomers with Hydroxocobalamin, in Soil Slurry Systems

2010 ◽  
Vol 44 (18) ◽  
pp. 7063-7069 ◽  
Author(s):  
B. Rodríguez-Garrido ◽  
T. A. Lú-Chau ◽  
G. Feijoo ◽  
F. Macías ◽  
M.C. Monterrroso
Keyword(s):  
Reductive Dechlorination ◽  
Soil Slurry ◽  
Hexachlorocyclohexane Isomers

Methods for the Concentration of Bovine Ac-Globulin (Factor V)

1961 ◽  
Vol 06 (03) ◽  
pp. 435-444 ◽  
Author(s):  
Ricardo H. Landaburu ◽  
Walter H. Seegers
Keyword(s):  
Room Temperature ◽  
Barium Carbonate ◽  
Deae Cellulose ◽  
Reducing Agents ◽  
Factor V ◽  
Isoelectric Precipitation ◽  
Stabilizing Agent ◽  
Bovine Plasma ◽  
The Stability

SummaryAn attempt was made to obtain Ac-globulin from bovine plasma. The concentrates contain mostly protein, and phosphorus is also present. The stability characteristics vary from one preparation to another, but in general there was no loss before 1 month in a deep freeze or before 1 week in an icebox, or before 5 hours at room temperature. Reducing agents destroy the activity rapidly. S-acetylmercaptosuccinic anhydride is an effective stabilizing agent. Greatest stability was at pH 6.0.In the purification bovine plasma is adsorbed with barium carbonate and diluted 6-fold with water. Protein is removed at pH 6.0 and the Ac-globulin is precipitated at pH 5.0. Rivanol and alcohol fractionation is followed by chromatography on Amberlite IRC-50 or DEAE-cellulose. The final product is obtained by isoelectric precipitation.

The study of the drilling mud fluid loss reducing agents based on carboxymethyl starch and cellulose

2017 ◽  
pp. 102-105
Author(s):  
R.R. Sagitov ◽  
◽  
K.M. Minaev ◽  
A.S. Zakharov ◽  
A.S. Korolev ◽  
...  
Keyword(s):  
Reducing Agents ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Carboxymethyl Starch

Organochlorine Contaminants in Headwater Peatlands, and Selected Estuary Sites of the Moose River

1986 ◽  
Vol 21 (2) ◽  
pp. 251-256 ◽  
Author(s):  
Robert C. McCrea ◽  
Greg M. Wickware
Keyword(s):  
Atmospheric Deposition ◽  
Organochlorine Pesticides ◽  
River Basin ◽  
Vascular Plants ◽  
Typha Latifolia ◽  
Coastal Marshes ◽  
Surficial Sediments ◽  
Organochlorine Contaminants ◽  
Hexachlorocyclohexane Isomers ◽  
Moose River

Abstract Peatland waters of the Moose River basin, as well as surficial sediments and vascular plants of the estuary were sampled in 1982. Elevated levels of PCBs were found at all five peatland sites; concentrations ranged from 28 to 65 ng/L. Of the seventeen organochlorine pesticides investigated, the hexachlorocyclohexane isomers (a-and y-BHC) were the most prominent with total BHC concentrations ranging from 1.5 to 13.7 ng/L. The presence of these contaminants in ombrotrophic bogs indicated that there was atmospheric deposition of organochlorine contaminants in the basin. Analyses of surficial sediments, collected from tidal flats and coastal marshes, showed that PCBs and organochlorine pesticides were not present. Samples of Triglochin maritima L. seed heads and Typha latifolia L. roots were also free of PCBs.

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