OEC

SPh determination of silicon and phosphorus in form of Si-Mo and P-Mo heteropolyacids are used successfully for series determination of these heteroelements in OEC and polymers (polysiloxanes, polyphosphazenes, etc.). 

Calculation of the occupational exposure concentration (OEC) depends on the type of OEL. For example, when the limit value has been set as an eight-hour time-weighted average, the cumulative exposure for an eight-hour work shift should be computed as follows ... 

The CREDO data base contains data from The Fast Flux Test Facility in Richland, Washington, The Experimental Breeder Reactor - II in Idaho Falls, Idaho, The test loops of the Energy Technology Engineering Center (ETEC) in Canoga Park, California, The JOYO Liquid Metal Fast Breeder Reactor at the 0-Arai Engineering Center (OEC) in Japan, and the test loops of OEC. 

FIG. 3 Lime soap dispersing power of some alkyl ether carboxylates compared to other surfactants (DIN 53903). AEC, alkyl ether carboxylate AMEC, amidether carboxylate CAPB, cocamidoproplylbetaine OEC, oleyl ether carboxylate SLES, sodium lauryl ether sulfate. % surfactant soap = % surfactant calculated on the soap needed to disperse the lime soap. (From Refs. 61 and 64.)... 

Octaethyl and tris(pentafluorophenyl) corroles, known as oec and tpfc, respectively, are also efficient for the stabilization of P(VI) phosphorus [53,54]. The electron-rich oec reacts with PCI3 to form (oec)P=0 40 that can be further derived into dihydrido 41a, dimethyl 41b and diphenyl 41c compounds by reduction with LiAlH4 and reactions with methyl and phenyl Grignard reagents. 

Wagner, V. Wobkenberg, P Hoppe, A. Seekamp, J. 2006. MHz organic field effect transistors. Proceedings of OEC-06 Peer Reviewed Papers, pp. 7. 

Kempa, H. Fugmann, U. Hahn, U. Schmidt, G. Meier, B. Bartzsch, M. Fisher, T. Stanerl, M. Reuter, K. Preibler, K. Huebler, A. 2006. On the applicability of different mass printing methods for the deposition of organic functional materials. Proceedings of OEC-06 Peer Reviewed Papers, pp. 39. 

One example of a tin porphycene has been reported, but as yet no organometallic derivatives have been reported." A small number of tin corrole complexes are known including one organotin example, Sn(OEC)Ph, prepared from the reaction of Sn(OEC)Cl with PhMgBr. A crystal structure of Sn(OEC)Ph shows it to have both shorter Sn—N and Sn—C bonds than Sn(TPP)Ph2, with the tin atom displaced 0.722 A above the N4 plane of the domed macrocycle (Fig. 6). The complex undergoes reversible one-electron electrochemical oxidation and reduction at the corrole ring, and also two further ring oxidations which have no counterpart in tin porphyrin complexes. " " ... 

Fig. 6. Molecular structures of selected Group 14 organometallic porphyrin complexes (a) Si(TPP)(C6H5)2, (b) Si(TPP)(CH2SiMe3)2, (c) cis-SnCTBPPKCeHjlz (TBPP = tetra(4- Bu-phenyl)porphyrin), (d) rranr-Sn(TPP)(C6H5)2, (e) Sn(OEC)(C6H5)." ...

In the absence of suitable crystals for an X-ray structural study, combinations of FTIR, RR, XAS, EPR, ENDOR, XANES, and ESEEM spectroscopies were used to characterize the manganese site in the OEC. Vibrational spectroscopy, particularly low-frequency FT infrared and... 

EPR has played an important role in understanding of the OEC, and four of the five S states in the catalytic cycle can be characterized by gpR 812,81t 19 EPR signals can arise from the S2... 

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