Islamic Azad University North Tehran Branch

About: Islamic Azad University North Tehran Branch is a education organization based out in Tehran, Iran. It is known for research contribution in the topics: Adsorption & Catalysis. The organization has 868 authors who have published 968 publications receiving 9987 citations.

Lithostratigraphy, microbiostratigraphy and microfacies of the ilam formation in southwestern khorram abad

Abstract: سازند ایلام در جنوب باختر خرم‌آباد به ستبرای 204 متر عمدتا از تناوبهای یکنواخت سنگ‌آهک در طی یک رسوب‌گذاری پیوسته در زمان تورونین میانی تا کامپانین پیشین تشکیل شده است. این سازند در برش مورد مطالعه با مرزی تدریجی بر روی سازند سورگاه قرار گرفته و توسط سازند گورپی نیز با مرزی تدریجی و پیوسته پوشیده شده است. در مطالعات حاضر 9 جنس، 30 گونه و 2 زیست‌زون از روزن‌داران پلانکتون تشخیص داده شد. سازند ایلام در برش مورد مطالعه از یک رخساره شیلی و سه ریز‌رخساره کربناتی به نامهای گل‌سنگ، وکستون و پکستون دارای روزن‌داران شناور ساخته شده است. رخساره شیلی و ریز‌رخساره‌های‌ نام برده در بخش ژرف دریای باز ساخته شده‌اند به گونه‌ای که شیل در شرایط آرام محیطی نهشته شده است و انرژی محیطی از ریز‌رخساره با بافت گل‌سنگ به سوی ریز‌رخساره‌های با بافتهای وکستون و پکستون افزایش یافته است. با توجه به این که ریز‌رخساره‌های وابسته به بخشهای کم‌ژرفای فلات قاره مانند سد، تالاب و پهنه‌های کشندی در برش مورد مطالعه شناسایی نشده‌اند، بنابراین ناحیه مورد مطالعه ژرف‌‌ترین بخش حوضه رسوبی در زمان تورونین میانی- کامپانین پیشین بوده است.

Detection of sul2 gene in escherichia coli isolated from patients with urinary tract infections admitted to clinical centers of khoy city

Abstract: Background and Objective Widespread use of co-trimoxazole in urinary tract infection treatments and its incorrect use has led to the emergence of co-trimoxazole resistant E. coli strains. The aim of this study was to evaluate sul2 gene among E.coli isolates of patients admitted to the clinical centers of Khoy city. Materials and Methods: Three hundred urine samples were collected from clinical centers of Khoy city. Among them, 100 E.coli isolates were confirmed by standard biochemical tests. Furthermore, the antibiotic susceptibility tests to 10 antibiotics were performed by the-disk-agar diffusion (DAD) method. Also, MIC and MBC were evaluated for co-trimoxazole by microdilution broth method. Finally, PCR was done in order to find sul2 gene in resistant isolates. Results: Of 100 isolates, 71(71%) were resistant to co-trimoxazole out of which 57(80%) had sul2 gene. This gene was recognized in sulfonamides-resistant isolates which did not create any zone of inhibition. Also, the isolates with sul2 gene were found to be simultaneously resistant to ampicillin, nalidixic acid and ciprofloxacin. In co-trimoxazole-resistant isolates, MIC and MBC for Co-trimoxazole were calculated 16 and 32μg/ml. Conclusion: This study was the first of its kind in Iran with the main objective of manifesting the presence of sul2 gene in E.coli. The results of the present study indicate that antibiotic-resistance percentage in Khoy city reaches to 71%. In such a situation, it is inevitable to see resistance to all common antibiotics currently prescribed to patients at clinical centers which will, in turn, result in treatment failures.

Measuring liquidity risk in Social Security using VaR technique

Abstract: Article history: Received October 15, 2012 Received in revised format 4 December 2012 Accepted 8 December 2012 Available online December 9 2012 Measuring liquidity risk plays an important role on any business unit especially financial organizations. Social security systems in most countries around the world are responsible to provide necessary requirements in many countries such as health care, pension plans, etc. Therefore, it is necessary to reduce any risk associated with these systems as much as possible. In this paper, we study liquidity risk in Iranian social security using VaR technique. The proposed model of this paper uses historical information for a fiscal year of 2008-2011. We first divide the information of each year into two groups of first and second half and using VaR technique analyzed whether there was any trend change in these two groups. The results of our survey indicate that the mean of VaR in the second half of the year is greater than the first half of the year. Therefore, we can confirm that VaR maintains an increasing trend over the time horizon. We also study the trend in liquidity using regression analysis for each year, separately and the results of our survey confirm that there was an increasing trend in liquidity over time. © 2013 Growing Science Ltd. All rights reserved.

The Effect of Informing Services and Their Assessment in Local and Foreign Sites of Azad Universities Libraries in Guilan Province

Abstract: . The main purpose : Purpose of the present research is to study the effect of information services and assessing them in local and foreign sites Azad universities libraries in Guilan province. Research methodology and statistical population: Method of research has been survey and field and library methods have been used. Statistical population consists of professors, master and doctoral students and librarians of Azad universities in Guilan province that were totally 650 people. Based on the Krejcie Morgan table, sample size of the population is 152 people that 146 of them responded the questionnaires; 109 individuals were students, 28 ones professors and 11 ones were librarians. The data collection tool was a questionnaire that included open and close questions. Three kinds of questionnaire has been designed for the population. In order to determine validity of questionnaire, opinions of experts such as professors, consultants and specialists in the field of library and information were use and ambiguous questions were removed and other questions were replaced. Cronbach's alpha coefficient was used to determine the reliability of questionnaire, that for each of it was computed more than 7 /. and thus the reliability of the questionnaire is acceptable. In order to test hypotheses proposed one sample t- test was used. SPSS22 statistical software Excel were used to analyze data and results are shown in bar, line and pie graphs. Results: since in the present research questions and hypotheses were the same, hypotheses can be confirmed by considering one sample t-test for each hypothesis as 5./.=a. Therefore, considering one sample t-test 5. /. =a, it is found that the hypothesis of information communications technology’s being effective on efficiency of libraries in Azad universities of Guilan is accepted with 95 percent of certainty. Also by considering one sample t-test 5. /. =a it is found that with 95 percent of certainty the hypothesis of effective roles of individuals’ being familiar with data bases, online tools of search, official and unofficial information sources in users’ use of information is accepted.Of course, significance of teaching information search skills is effective on rate of users’ use of information. Conclusion: In this study, it can be concluded that due to the impact of information services and their assessment on local and foreign sites of libraries in Azad universities of Guilan, by increasing awareness of users about new ways of information and their familiarity with database, mopre information can be obtained in a better way, scientific level of users can be enhanced and finally efficiency of libraries of Azad universities in Guilan can be improved.