Preparation of 2-Chlorobenzonitrile, and benzonitrile are reported here from the corresponding 2-Chlorobenzaldehyde and benzaldehyde by the reaction of ammonium hydroxide/VPO titania, VPO bulk (...

شعر از دیر باز تصویرگر وقایع زمان خود بوده و هست و شاعران زیادی از جمله مطران در شعر خود به ثبت وقایع تاریخی پرداخته اند. ما در این مقاله ضمن بررسی شعر تاریخی مطران، نظر وی را در زمینه ی ارتباط بین تاریخ وسیاست مورد بحث قرار داده ایم. این مقاله به موضع گیری مطران در برابر ستمگران تاریخ می پردازد و نقش مطران را در رهبری جنبش نوآوری در قصائد تاریخی وی تبیین می کند و سبک شعری را که برای بیان نگاهش...

0

new derivatives of 2-[2-(2-chlorophenoxy)phenyl]-1,3,4-oxadiazole as candidates for agonistic effect on benzodiazepine receptors were synthesized. conformational analysis and superimposition of energy minima conformers of the novel compounds on estazolam, a known benzodiazepine agonist, revealed that the main proposed benzodiazepine pharmacophores were well matched. in pharmacological evaluatio...

In this paper, we proposed a new, highly scalable method to solve the database selection problem when the number of local databases in a metasearch engine is very large. For single-term queries, this method guarantees all desired documents to be retrieved. Experiments were conducted to show that this method is very eeective for typical short Internet queries. We also illustrated that the our da...