Results 141 to 150 of about 3,020 (171)

Acetylcholinesterase mutants: oxime-assisted catalytic scavengers of organophosphonates.

Chemico-biological interactions, 2004
instead abstract, part of the Introduction: Reaction of organophosphonates with acetylcholinesterase (AChE ; EC 3.1.1.7) is characterized by the formation of serine-conjugated adducts that are only slowly reversible. Since oximes are the only known antidote to nerve agent poisoning that restore the activity of AChE, mutagenesis of AChE should enable ...
Kovarik, Zrinka, Radić, Zoran, Simeon, Vera, Reiner, Elsa, Taylor, Palmer   +4 more
openaire   +5 more sources

Fireproofing of polyurethane by organophosphonates

Journal of Thermal Analysis and Calorimetry, 2007
International ...
Youssef, B., Mortaigne, B., Soulard, M., Saiter, J.   +3 more
openaire   +5 more sources

Heterocyclic Amine Derivatives of Zinc Organophosphonates

Chemistry of Materials, 2004
A series of novel zinc(II) organophosphonates with coordinated 2,2‘-bipyridyl (2,2‘-bipy, C10H8N2) and 1,10-phenanthroline (phen, C12H8N2) ligands (with the proposed formulations:  Zn(O3PC6H5)(C12H8N2), Zn2(O3PR)2(C12H8N2) (R = C6H5CH2, C2H5, CH3), and Zn2(O3PR)2(C10H8N2)(H2O) (R = C6H5, C6H5CH2)) has been prepared and characterized.
Rachael C. Clarke, Kay Latham, Colin J. Rix, Malcolm Hobday   +3 more
openaire   +1 more source

Microbial degradation of organophosphonates by soil bacteria

Microbiology, 2008
Bacteria that can utilize glyphosate (GP) or methylphosphonic acid (MPA) as a sole phosphorus source have been isolated from soil samples polluted with organophosphonates (OP). No matter which of these compounds was predominant in the native habitat of the strains, all of them utilized methylphosphonate.
I T, Ermakova, T V, Shushkova, A A, Leont'evskiĭ   +2 more
openaire   +2 more sources

Bis(difluoroaluminum)organophosphonates and difluoroaluminumdiorganophosphinates

Journal of Polymer Science: Polymer Chemistry Edition, 1984
AbstractOligomers and polymers of the general types [RR′P(O)OA1F2]n, I, and [F2AlOP(R)(O)OAlF2]n, II, were prepared by the addition of phosphonic or phosphinic acids and hydrogen fluoride to etherated alanes. The hydrocarbon moieties (R,R′) on the phosphonic and phosphinic acids were important determinants of physical and chemical properties.
Edward E. Flagg, Donald L. Schmidt
openaire   +1 more source

Degradation of organophosphonates by Penicillium citrinum

Letters in Applied Microbiology, 1992
Utilization of organophosphonates as the sole source of phosphorus, carbon or nitrogen by a soil isolate of Penicillium citrinum was studied. Penicillium citrinum was found to utilize 2-aminoethylphosphonic and 2-oxoalkylphosphonic acids as the sole phosphorus source whereas 1-hydroxyalkylphosphonates as well as 1-aminoalkylphosphonates and their ...
E. Zboińska, I. Maliszewska, B. Lejczak, P. Kafarski   +3 more
openaire   +1 more source

Organophosphonic acids as drug candidates

Expert Opinion on Therapeutic Patents, 2006
The discovery of phosphate mimetics that are suitable as drug candidates has been a challenging problem faced by medicinal chemists for many years. Several series of organophosphonic acids have been identified as phosphate mimetics and have resulted in multiple development candidates progressing to the clinic and even successfully reaching the market ...
openaire   +1 more source

Radical-based dephosphorylation and organophosphonate biodegradation

Journal of the American Chemical Society, 1987
Products resulting from the degradation of organophosphonates by Escherichia coli are identified and used as a basis for evaluating mechanisms which may be the chemical basis of the biodegradation. One mechanistic hypothesis which is consistent with the biodegradation products involves radical-based dephosphorylation.
J. W. Frost, S. Loo, M. L. Cordeiro, D. Li   +3 more
openaire   +1 more source

Organophosphonate derivatives of titanium and niobium alkoxoanions

Journal of Organometallic Chemistry, 1998
The organophosphonate-substituted alkoxides [Bu4nN]2[{Ti(OMe)3(O3PPh)}2] (1) and [Bu4nN]2[{Nb(OMe)3(O3PPh)}2(μ-O)] (2) were prepd. from [Bu4nN][PhPO3H] and the metal alkoxides Ti(OMe)4 or Nb(OMe)5 resp. 1 And 2 were characterized by x-ray crystallog. (1·PhMe: monoclinic, space group C2, R = 0.0449; 2: monoclinic, space group P21/n, R = 0.0452).
Errington, R John, Ridland, John, Willett, Kathryn J, Clegg, William, Coxall, Robert A, Heath, Sarah L   +5 more
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Chapter 15. Metal Organophosphonate Proton Conductors

2011
New ion conducting materials have major applications in new energy technologies. Foremost among these are applications as proton-conducting electrolyte membranes in hydrogen and direct methanol fuel cells and Li ion conductors for batteries. Significant challenges confront candidates for these membranes collectively, with the goal of better cost ...
George K. H. Shimizu, Jared M. Taylor, Karl W. Dawson   +2 more
openaire   +1 more source