we describe here a suitable approach for the synthesis of n-unsubstituted monocyclic b-lactams under mild reaction conditions by the annelation of imines with substituted acetylchlorides. in this method the reaily available phtalimidoacetyl chloride were allowed to react with - dibenzylideneiminotoluene (hydrobenzamide) in the presence of an equimolar amount of triethylamine in refluxing toluen...

in this project, some new polyaspartimides, (pas)s, have been synthesized form michael addition reaction between new synthetic bismaleimide (bmi) and some aromatic diamines. a characteristic property of this polyaspartimides is a pendent carboxylic group, which introduced to these polymers from new bismaleimide. bismaleimides (bmi) is one of the interesting compounds, which can be self-polymeri...

سرطان مری، یکی از تهاجمی¬ترین نوع سرطان دستگاه گوارش، شایع ترین علت مرگ و میر های مرتبط با سرطان درجهان است. بیشترین بروز سرطان مری در گروه سنی 70-50 سال رخ می دهد. همچنین فراوانی این بیماری در مردان بیشتر از زنان است. تحقیقات مختلف اثبات کرده است که آنکوژن astrocyte elevated gene-1 (aeg-1)، که همچنین mtdh و lyric نیز نامیده می¬شود) در چندین جنبه از پیشرفت تومور نقش اساسی بازی می¬کند. بیان یا ت...

Introduction: Heat stress is one of the Hazardous physical agents in the workplace, which can cause impairment of cognitive performance. The current study aimed to evaluate the effect of different levels of heat stress on attention and reaction time in a laboratory condition. Material and Method: This experimental study was done among 33 students included 17 males and 16 females. Mean age of...