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...

در مواردی سیستم ایمنی بدن باعث بروز بیماریهای ایمنی مانند آنمی همولتیک نوزادان ‏‎hdn‎‏ می شود. تنها راه پیشگیری ایزوایمونیزاسیون ‏‎rh‎‏ ، ،تجویز پارتابولین ‏‎(anti-d)‎‏ به مادران ‏‎rh‎‏ منفی بعد از تولد نوزاد ‏‎rh‎‏ مثبت می باشد. پیشگیری از آلوایمونیزاسیون ناشی از ترانسفوزیون و درمان ‏‎itp‎‏ از دیگر اندیکاسیونهای تجویز ‏‎anti-d‎‏ می باشد. روش ‏‎acid elution‎‏ برای شناسایی میزان ‏‎fmh‎‏ جهت تصحی...

the changes in todays world organization, to the extent that instability can be characterized with the most stable organizations called this afternoon. if you ever change management component, an additional value to the organization was considered, today, these elements become the foundation the organization is survival. the definition of the entrepreneur to identify opportunities to exploit a...

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...

the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...

growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...

the aim of this study is to examine the difference between the introverts and extroverts in preferred advice-giving style. furthermore, it explores the difference between l1 (persian) and l2 (english) regarding the giving of advice for the extroverts and introverts separately. it investigates whether an extrovert or introvert gives advice in the same manner in his l1 (persian) and l2 (english) ...