نتایج جستجو برای: secalins sec
تعداد نتایج: 17871 فیلتر نتایج به سال:
We establish a new algebraic characterization of sectional curvature bounds $\sec\geq k$ and $\sec\leq using only terms in the Weitzenb\"ock formulae for symmetric $p$-tensors. By introducing analogue Kulkarni-Nomizu product, we provide simple formula such terms. also give an application Bochner technique to closed $4$-manifolds with indefinite intersection form $\sec>0$ or $\sec\geq0$, obtaini...
A Cu(II)-MOF (1') with open metal sites was readily obtained by removing the coordinated water molecule at 120 °C. It can be used as a probe to evidence the sec-alkyl hydroperoxide species generated from room temperature sec-alcohol auto-oxidation in air. The formed alkyl hydroperoxides can be effectively catalyzed by 1' to decompose into molecular oxygen and corresponding sec-alcohols under am...
(13)C NMR, alone or in combination with (1)H NMR, allows the assignment of the absolute configuration of chiral alcohols, amines, carboxylic acids, thiols, cyanohydrins, sec,sec-diols and sec,sec-aminoalcohols, derivatized with appropriate chiral auxiliaries. This extends the assignment possibilities of NMR to fully deuterated and to nonproton containing compounds.
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