a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

the west of esfahan province, iran, is one of the most important agricultural areas throughout the country due to the climate variability and life-giving water of zayanderood river. rice is one of the major and economic crops in this area. the most important climatic elements in agricultural activities which should be considered include temperature, relative humidity, precipitation and wind. so...

مطالعه حاضر به منظور بررسی تاثیر bmp-4 بر تمایز قلبی سلول های بنیادی بافت چربی (adscs) طراحی شد. به این منظور، adsc ها از بافت چربی اینگوینال موش جداسازی و کشت داده شدند. برای تمایز قلبی، adsc ها به مدت 5 روز در محیط حاوی fbs یا kosr با غلظتهای مختلف فاکتور bmp-4 تیمار شدند. 21 روز پس از آغاز تمایز، بیان فاکتور های نسخه برداری و ژن های اختصاصی قلب بررسی شد. به علاوه، امکان بهینه سازی محیط تمایز...