Search results for "Phosphonium"
showing 8 items of 168 documents
Using exomarkers to assess mitochondrial reactive species in vivo
2014
Background:\ud The ability to measure the concentrations of small damaging and signalling molecules such as reactive oxygen species (ROS) in vivo is essential to understanding their biological roles. While a range of methods can be applied to in vitro systems, measuring the levels and relative changes in reactive species in vivo is challenging.\ud \ud Scope of review:\ud One approach towards achieving this goal is the use of exomarkers. In this, exogenous probe compounds are administered to the intact organism and are then transformed by the reactive molecules in vivo to produce a diagnostic exomarker. The exomarker and the precursor probe can be analysed ex vivo to infer the identity and a…
Inhibitoren der Korrosion 25(1) - Über die Rolle der Kationen in Neutralsalzen bei der Korrosion von Eisenwerkstoffen in Gegenwart von Sauerstoff
1979
Die Geschwindigkeit des Sauerstoffverbrauchs bei der Korrosion von jeweils 500 mg DAB6-Eisenpulver wird in Abhangigkeit von der Art des Kations in Neutralsalzen (Chloriden) unter Standardbedingungen bestimmt. In Gegenwart von Alkali-, Quartaren Ammonium, Quartaren Phosphonium-und Erdalkalichloriden ist die Geschwindigkeit des Sauerstoffverbrauches vergleichbar gros. Mit Zink-, Cadmium-, Nickel-und Kobaltchloriden wird aber im Bereich von pH5 bis pH7 eine uberraschend grose Verzogerung der Sauerstoffaufnahme beobachtet. Es handelt sich mit hoher Wahrscheinlichkeit um eine Blockade der kathodischen Bezirke in der Eisengrenzflache durch Abscheidung der schwerloslichen basischen Hydroxyde von Z…
Phosphonium-Boronate Amino Acid Derivatives as Fluoride Pincers for 18F-Labelling
2015
The synthesis of phosphonium-boronate amino acid derivatives was achieved by quaternization of o-boronatophenylphosphine with iodo-amino acid derivatives. Preliminary radiolabelling studies demonst...
Fragmentations and reactions of protonated O,O-dimethyl ethylphosphonate and some isotopomers produced by electrospray ionisation in an ion trap mass…
2008
Abstract The fragmentation behaviour of protonated O , O -dimethyl ethylphosphonate and its isotopomers deuterated in the α- and β-positions of the ethyl group and their fragment ions, particulary EtP(O)OMe + ( IV ), have been investigated both experimentally in an ion trap mass spectrometer and theoretically by electronic structure calculations at the B3LYP level. Of particular interest is the finding that the phosphonium ion IV eliminates ethene with hydrogen/deuterium loss from both the α-and β-positions. The initial step for both routes involves ethyl migration from P to O to form the ion MeOP + OEt which then loses ethene by two mechanisms, both of which lead to the same products. That…
CCDC 953879: Experimental Crystal Structure Determination
2013
Related Article: Huayan Yang, Yu Wang, Huaqi Huang, Lars Gell, Lauri Lehtovaara, Sami Malola, Hannu Hakkinen, Nanfeng Zheng|2013|Nat.Commun.|4|2422|doi:10.1038/ncomms3422
CCDC 953883: Experimental Crystal Structure Determination
2013
Related Article: Huayan Yang, Yu Wang, Huaqi Huang, Lars Gell, Lauri Lehtovaara, Sami Malola, Hannu Hakkinen, Nanfeng Zheng|2013|Nat.Commun.|4|2422|doi:10.1038/ncomms3422
CCDC 1020496: Experimental Crystal Structure Determination
2014
Related Article: Huayan Yang , Yu Wang , Juanzhu Yan , Xi Chen , Xin Zhang , Hannu Häkkinen , and Nanfeng Zheng|2014|J.Am.Chem.Soc.|136|7197|doi:10.1021/ja501811j
CCDC 173965: Experimental Crystal Structure Determination
2003
Related Article: G.Marinescu, R.Lecouezec, D.Armentano, G.De Munno, M.Andruh, S.Uriel, R.Llusar, F.Lloret, M.Julve|2002|Inorg.Chim.Acta|336|46|doi:10.1016/S0020-1693(02)00880-0