نتایج جستجو برای: semicarbazone
تعداد نتایج: 305 فیلتر نتایج به سال:
In Paper II we (1) have shown that methyl 3(a)-acetoxy-11,12epoxycholanate undergoes fission of the epoxide ring with the introduction of the anionic constituent at C-11. The products of such reactions offered, we felt, a possible route to the preparation of 3(a), 11-dihydroxycholanic acid. Marker and Lawson (2) prepared 3((r), 11-dihydroxy-1Zketocholanic acid by bromination and subsequent alka...
chalcogramma) stocks in the Bering Sea and Gulf of Alaska since 1979. As fisheries acoustic methodology has matured, acoustic research at the APSC has involved refinements in equipment and techniques. Whereas early echosounders and echo integrators were subject to the drifts associated with the use of analogue electronic circuitry and were limited by system dynamic range, modern units utilized ...
Searching for prospective vanadium-based drugs for the treatment of Chagas disease, a new series of heteroleptic [V(IV)O(L-2H)(NN)] compounds was developed by including the lipophilic 3,4,7,8-tetramethyl-1,10-phenanthroline (tmp) NN ligand and seven tridentate salicylaldehyde semicarbazone derivatives (L1-L7). The compounds were characterized in the solid state and in solution. EPR spectroscopy...
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