attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...

one of the most important goals for increasing recognition and treatment revenue is transmitting vital data to medical care team, more quickly. nowadays, use of new technologies for transmitting data will deploy more and more daily. in this article, for transmitting electrocardiogram, first we code the signal into a suite of codes, then we will use bluetooth technology to transmit data from off...

مطالعة حاضر در مراتع حوضة آبخیز گلندرود در استان مازندران انجام شد. هدف اصلی این مطالعه مقایسة دامنة اکولوژیک Festuca ovinaو Poa bulbosa بابرخی متغیرهای محیطی با استفاده از تابع HOF بود. بدین منظور، 150 پلات یک‌متر مربعی در طول گرادیان متغیر‌های محیطی در مراتع مستقر شد. نمونه‏برداری به ‌صورت تصادفی‌‌- سیستماتیک صورت گرفت. در سطح نمونه‌برداری حضور و عدم حضور گونه‌های F. ovinaو P. bulbosa، ارتفاع...

chapter two presents three m-admissible function algebras ab, bd, and sl, to construct the universal abelian, band, and semilattice compactifications, respectively. the main results are (11.3), (12.3), and (12.4). some inclusion relationships between these function algebras and the other well-known ones, presented in section 8, are made via the devico of compactifications. chpter three is about...

مطالعة حاضر در مراتع حوضة آبخیز گلندرود در استان مازندران انجام شد. هدف اصلی این مطالعه مقایسة دامنة اکولوژیک festuca ovinaو poa bulbosa بابرخی متغیرهای محیطی با استفاده از تابع hof بود. بدین منظور، 150 پلات یک متر مربعی در طول گرادیان متغیر های محیطی در مراتع مستقر شد. نمونه‏برداری به صورت تصادفی - سیستماتیک صورت گرفت. در سطح نمونه برداری حضور و عدم حضور گونه های f. ovinaو p. bulbosa، ارتفاع، ...

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

the aim of conducting this study was to investigate the foreign language learning needs of undergraduate economics students and business management students in faculties of social sciences of alzahra and azad naragh university. in the study, which was designed on the basis of a qualitative-quantitative basis using interviews and questionnaires, 146 female undergraduate business management as we...

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

in this study, a simple, rapid and selective method was developed for the determination of dexamethasone. the proposed method is based on inhibitory effect of dexamethasone on the oxidation of orange-g by bromate in sulfuric acid media. the reaction was followed spectrophotometrically at 478.5 nm (?max). under optimum experimental conditions, (72.6 ?mol l-1 of orange-g, 0.76 mol l-1 of h2so4, 0...