نتایج جستجو برای: first record of occurrence
تعداد نتایج: 21216113 فیلتر نتایج به سال:
after around a hundred years of being without any record of occurrence of paracobitis rhadinaea, a species of nemacheiline loach, in sistan basin, southeast of iran, the year 2012 was the turning point of wild life in this area. twenty-five specimens were caught from chahnimeh reservoir, a water body adjacent to the hamoun wetland in sistan basin. morphometric and meristic characteristics were ...
طی نمونه‌برداری‌های انجام‌شده از دشمنان طبیعی شته‌ها در اردبیل طی سال‌های 91-1390، لاروهای مگس شکارگر از خانواده Chamaemyiidae در حال تغذیه از شته Pemphigus spyrothecae Passerini روی درخت صنوبر، Populus nigra (L.)، جمع‌آوری و پس از پرورش در شرایطی مشابه شرایط محل جمع‌آوری، حشرات کامل به نام Leucopis (Leucopis) spyrothecae Raspi, 2003 شناسایی شدند. این گونه برای اولین‌بار از ایران گزارش می‌شود.
199 human serum samples were examined for the presence of myxovirus parainfluenza 3 (mpi 3) haemagglutination inhibition (hi) antibodies. or tbe total male sera, 75% and female 70.52% had hi antibody titers of t:32 or greater. the percentage of positive samples increased according to the age grouping of the human beings. these results indicate that mpi 3 virus infection is widespread among the ...
the purpose of this study was to investigate how english language teachers in mashhad who teach students in the pre-university cycle perceived the impact of the efltee on their teaching. the target population was nearly all pre-university english language teachers in seven districts of mashhad in the scholastic year 2008/2009. a survey questionnaire which consisted of (36) likert type items, wa...
power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...
this study investigated (a) the learners’ existing reading strategy repertoire, (b) the effect of instruction in reading strategies on learners’ strategic performance, and (c) the effect of explicit instruction in top-down reading strategies on reading comprehension ability of intermediate learners. the study was conducted with 40 intermediate efl learners in two groups of experimental and cont...
گونه (Homotropus elegans (Gravenhorst برای اولین‌بار از ایران گزارش می‌شود. به‌این‌ترتیب، تعداد گونه‌های گزارش‌شده از این جنس از ایران به پنج گونه افزایش می‌یابد.
در این بررسی، زنبور Pediobius metallicus (Nees) به‌عنوان پارازیتویید مگس Liriomyza sp. (Dip.: Agromyzidae) از شهرستان زابل )استان سیستان و بلوچستان( جمع‌آوری و شناسایی شد. این زنبور برای فون حشرات ایران رکورد جدیدی محسوب می‌شود.
In a sequence of random variables, record values are observations that exceed or fall below the current extreme value.Now consider a sequence of pairwise random variables {(Xi,Yi), i>=1}, when the experimenter is interested in studying just thesequence of records of the first component, the second component associated with a record value of the first one is termed the concomitant of that ...
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