نتایج جستجو برای: 21g 6
تعداد نتایج: 956445 فیلتر نتایج به سال:
The photochemistry of tetrazolones derived from the carbocyclic allylic alcohols cyclohex-2-enol and 3-methylcyclohex-2-enol and from the natural terpene alcohol nerol was investigated in solution with the aim of assessing the effect of solvent and of structural constraints imposed by bulky allylic moieties on photoproduct selectivity and stability. Photolysis of tetrazolones derived from nerol...
Adipose-derived mesenchymal stem cells (ASCs) have been identified for their promising therapeutic potential to regenerate and repopulate the degenerate intervertebral disk (IVD), which is a major cause of lower back pain. The optimal cell delivery system remains elusive but encapsulation within scaffolds likely offer decisive advantage over in solution by ensuring successful retention tissue. ...
چکیده: در این کار تحقیقاتی بهینه سازی کامل ساختار هندسی با استفاده از روش تابعیت چگالی (dft)با مجموعه پایه 3-21g* بر روی گونه ای ازنانو ساختارهای نیترید بور به نام نانو ورقه نیترید بور b15n15 وکاربردآن در انتقال دارو انجام گرفت. در قسمت اول کار با بهینه نمودن ساختار نانو ورقه b15n15 و بدست آوردن پارامترهای مربوطه از قبیل: ساختار مولکولی، فرکانسهای ارتعاشی، بار اتمها، گشتاور دو قطبی و پایداری ...
using ab initio calculations, the hydrogen desorption from magnesium hydride (mgh2) was studied. we presented the calculated nuclear quadrupole coupling constants (nqccs) of hydrogen atom in various systems of mgh2. the effect of interactions of some metal atoms as well as boron atom with mgh2 host matrix; (mgh2+m) nanostructures (m=al, ti, v, fe, ni and b); were studied and 2h-nqccs were calcu...
1. 0. Diels and K. Alder, Justus Liebigs Ann. Chem. 460, 98 (1928); 0. Diels, J. H. Blom, W. Koll, ibid. 443, 242 (1925); B. M. Trost, I. Fleming, L. A. Paquette, Comprehensive Organic Synthesis (Pergamon, Oxford, 1991), vol. 5, pp. 316; F. Friguelli and A. Tatichi, Dienes in the Diels-Alder Reaction (Wiley, New York, 1990), and references therein; W. Carruthers, Cycloaddition Reactions in Orga...
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