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جهت بهینه سازی شرایط تولید پروتئین هیدرولیز شده (شامل نسبت آنزیم به سوبسترا، دما و زمان) به منظور دستیابی به بالاترین خواص آنتی اکسیدانی، مینس تهیه شده از ضایعات میگوی ببری سبز (penaeus semisulcatus) پس از تعیین درصد پروتئین آن (13%، بر اساس وزن تر) با استفاده از دو پروتئاز تجاری آلکالاز و فلاورزایم بر اساس 18 تیمار تعیین شده با طرح آزمایشات سطح پاسخ برای هر آنزیم، هیدرولیز شده و با خشک کن انجم...
the purpose of this study was to test lotka’s law of scientific publication productivity in the field of library and information science (lis). the needed data is collected from the iranian journals (1381-1392) and were sorted in microsoft excel 2010. totally, 1994 articles published by 1470 authors. the authors frequencies were calculated based on the number of articles and regression were cal...
The present study aims to investigate the status and amount of self-citation in papers written by faculty members of University of Tehran in journals "Social Sciences Letters" and "Geographical Studies" during 1999 and 2008. To reach the goal, 212 papers were scrutinized using citation analysis method, which included 4565 citations. The research findings indicate that a considerable number of t...
Introduction: One of the most important branches of scientometrics is citation analysis which offers patterns showing authors’ information searching behavior and authors’ authorship. Citation Analysis provides a pattern of authors’ Information-seeking behavior and also Content Analysis provides a pattern of authorship. This study aimed to analyze the citations and content of p...
Recently, some authors proposed the use of symmetric weightsfor computing the elements of cross-efficiency matrix. In spite ofthe fact that the proposed method decreases the number of zeroweights, a large number of zero weights may still exist among inputand output symmetric weights. To decrease the number of input andoutput symmetric weights, this paper improves the proposed secondarygoal mode...
learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...
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