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Journal of Sol-Gel Science and Technology - Multifunctional magnetic mesoporous nanocomposites are promising materials to remove the various pollutants from water due to the remarkable properties... 相似文献
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用比较法测得23种啶类衍生物的荧光量子效率(Φf),以评估这些化合物的荧光性质,结果表明,N-烃基吖啶酮类化合物的荧光量子效率要比9-取代苯基吖啶类和9-取代苯亚甲基-10-甲基-9,10-二氢吖啶类化合物的荧光量子效率大,在非极性溶剂中,9-聚代苯亚甲基-9,10二氢吖啶分子内的强吸电子基NO2增强荧光量子效率,强推电子基OCH3降低荧光量子效率,这些测量结果与取代基的电子作用经验规律不相符,这种现象可以用分子内电荷转移理论进行解释。 相似文献
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mdat can 《Numerical Methods for Partial Differential Equations》2021,37(1):118-130
In this paper, first, we prove the weighted Hermite–Hadamard–Mercer inequalities for convex functions, after we establish some new weighted inequalities connected with the right‐sides of weighted Hermite–Hadamard–Mercer type inequalities for differentiable functions whose derivatives in absolute value at certain powers are convex. The results presented here would provide extensions of those given in earlier works. 相似文献
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Mehmet İşcan 《Thermochimica Acta》1985,94(2):305-312
Making use of the regular solution theory with binary coefficients, the partition of benzole acid between aqueous benzene phases was investigated. ΔH, ΔS and ΔG thermodynamic functions associated with the hydration-corrected partition and dimerization were calculated. It was found that the partition was spontaneous at high temperatures and of the hydrates of benzoic acid, the monohydrate monomer was dominant at high temperatures. 相似文献
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以布洛芬乙酯为反应底物,探索了酶促水解法拆分布洛芬的工艺。以曲拉通X-100为表面活性剂,利用南极假丝酵母脂肪酶B(CAL-B)催化拆分外消旋布洛芬乙酯,并对表面活性剂含量、有机溶剂种类和添加量、酶量、缓冲溶液pH、温度及时间等反应条件进行了优化;得到的最佳反应条件为:在pH为9.0的缓冲溶液中,添加80 mg曲拉通X-100、50 μL二氯甲烷和15 mg CAL-B,于30℃下反应48 h;在该条件下,S-布洛芬乙酯的剩余率(C)为65%,布洛芬乙酯的对映体过量值(ees)为94%。 相似文献
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正河北大学药学院朱华结教授编著的《Organic Stereochemistry—Experimental and Computational Methods》(有机立体化学—实验与计算方法)[1],由世界著名出版社Wiley-VCH正式面向全球出版发行。应作者邀请我很高兴向大家推荐这本著作。手性是自然界普遍而重要的特征。自然界中很多分子虽然原子组成相同,但其空间结构完全不同,呈实物与镜像不重合的关系,因而被形象地 相似文献
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We perform a multiple scales analysis on the nonlinear Schrödinger (NLS) equation in the Hamiltonian form together with the Hamiltonian function. We derive, as amplitude equations, Korteweg–de Vries (KdV) flow equations in the bi-Hamiltonian form with the corresponding Hamiltonian functions. 相似文献