نتایج جستجو برای: phosphine

تعداد نتایج: 3411  

Journal: :Indian journal of experimental biology 2003
Anupuma Raina H C Shrivastava Nitin Mathur T D Dogra

Phosphine has been known to science since the birth of modern chemistry. WHO reports that the technical product usually has a foul odour, like "fishy" or "garlicky" because of the presence of substituted phosphines and diphosphine (P2H4). Many medico-legal autopsy cases have been reported positive for aluminium phosphide even though there was neither any suspicion of consuming aluminium phosphi...

2010
Zhe Lian Guoqiang Xu Xiaoyan Li

The title compound, [Co(C(30)H(23)O(2)P(2))(C(3)H(9)P)(2)], was synthesized by the addition of a Co(PMe(3))(4) solution to (PPh(2)O)(2)C(6)H(4). The Co(I) atom displays a trigonal-bipyramidal geometry with the two P atoms of the 'PCP' pincer ligand and the P atom of one of the trimethyl phosphine ligands forming the basal plane, whereas the metalated C atom and the P atom of the second phospine...

Journal: :Neotropical entomology 2010
Marco A G Pimentel Lêda R D'A Faroni Felipe H da Silva Maurílio D Batista Raul N C Guedes

The resistance to fumigant insecticides in stored-products insects is often recorded. Several factors influence the evolution of insecticide resistance. Among these, the frequency of applications and the migration of resistant populations are of primary importance for the stored-product insects. The aim of this study was to characterize the spectrum and investigate the status of phosphine resis...

2012
Rajeswaran Jagadeesan Patrick J. Collins Gregory J. Daglish Paul R. Ebert David I. Schlipalius

The recent emergence of heritable high level resistance to phosphine in stored grain pests is a serious concern among major grain growing countries around the world. Here we describe the genetics of phosphine resistance in the rust red flour beetle Tribolium castaneum (Herbst), a pest of stored grain as well as a genetic model organism. We investigated three field collected strains of T. castan...

Journal: :Environmental monitoring and assessment 2005
Joris Roels Frank Vanhaecke Willy Verstraete

A technique was developed to measure the total gaseous phosphorus content in biogas. The amount of air needed for a neutral to oxidising flame was mixed with the biogas. The gas mixture was burnt in a closed quartz burner and the combustion gasses were bubbled through a nitric acid solution. The phosphate content in the bubbling liquid was determined with sector field ICP-MS. The technique was ...

2010
Wei Li Guohua Hou Xianfeng Sun Gao Shang Weicheng Zhang Xumu Zhang

Chiral rigid and electron-donating phosphocyclic phosphine ligands and modular atropisomeric biaryl phosphine ligands were designed and synthesized. The performance of these chiral ligands in the asymmetric hydrogenations of prochiral dehydroamino acid derivatives, enamides, imines, keto esters, and ketones has been demonstrated to be excellent.

Journal: :Journal of economic entomology 2016
S G Gautam G P Opit E Hosoda

Phosphine resistance in stored-product insects occurs worldwide and is a major challenge to continued effective use of this fumigant. We determined resistance frequencies and levels of resistance in Tribolium castaneum and Plodia interpunctella collected from California almond storage and processing facilities. Discriminating doses of phosphine were established for eggs and larvae of P. interpu...

Journal: :Dalton transactions 2016
T C Wambach C Lenczyk B O Patrick M D Fryzuk

Tridentate amine-imine-phosphine ligands, R2PC5H7NC2H4NEt2 [(R)PNN(H)], where R = Pr(i) or Bu(t) are synthesized using a straightforward protocol of condensation, deprotonation, and addition of a chlorodialkylphosphine. Multinuclear NMR spectroscopy shows the ligands exist exclusively in the enamine tautomeric form in solution. Treating these ligands with RuHCl(PPr(i)3)2(CO) forms the desired c...

2005

terconversion of branched alkyl (a) and linear acyl ( f ) species, which is consistent with the observations made above. Thus by modifying the microstructure of the liquid assembly, through the addition of surface active agents and the polarity of the organic solvent, it is possible to effect high selectivities to total aldehydes. Other features which make this system attractive are that high n...

2016
Iwao Omae

In carbon dioxide utilization by cyclometalated five-membered ring products, the following compounds are used in four types of applications: 1. 2-Phenylpyrazole iridium compounds, pincer phosphine iridium compounds and 2-phenylimidazoline iridium compounds are used as catalysts for both formic acid production from CO2 and H2, and hydrogen production from the formic acid. This formic acid can be...

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