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Effect of oxides of the IV and VI group metals on the polymorphic transformation of anatase into rutile 总被引:1,自引:0,他引:1
Dauren Sembaev Faina Ivanovskaya Lyudmila Saurambaeva Olga Yugay Tatyana Mikhailovskaya 《Reaction Kinetics and Catalysis Letters》2008,93(2):211-217
An effect of some metal oxides on the polymorphic transformation of anatase into rutile and on the rate of dissociation of
V2O5 in the systems V2O5-TiO2 and V2O5-TiO2-MexOy has been studied, where MexOy is SnO2, WO3, Cr2O3 or ZrO2. 相似文献
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Dauren Biyashev Krisztina Monory Sandor Benyhe Johannes Schütz Martin Koch Helmut Schmidhammer Anna Borsodi 《Helvetica chimica acta》2001,84(7):2015-2021
Several new indolo‐ and benzofuromorphinans substituted at the positions 5 and 14 were prepared and tested in vitro by means of opioid‐receptor binding and functional ([35S]GTPγS binding) assays. All compounds 1 – 11 displayed high affinity for δ opioid‐binding sites (Table 1). Compound 4 proved to be an agonist, and all other compounds were antagonists. The presence of a Me group at position 5 induced no change in δ affinity (see 1 vs. 3 ), but decreased the μ and κ affinities. An EtO group at position 14 conferred a very high affinity and also high selectivity to δ opioid receptors (see 2 and 10 ). Chain elongation of the 14‐alkoxy group resulted in compounds with reduced δ affinity and selectivity (see 4 and 11 and also 5 – 9 ). The results of the present study indicate that the 5‐ and 14‐positions of indolo‐ and benzofuromorphinans represent critical sites that could be a trigger to develop new compounds with increased δ affinity and/or selectivity. 相似文献
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