نتایج جستجو برای: eight physical factors including size of sub

تعداد نتایج: 21334352  

ژورنال: علوم آب و خاک 2012
ابراهیم گویلی کیلانه, , محمدرضا وهابی, ,

Vegetation is the most important factor in sustainable and dynamic equilibrium of natural ecosystems. Considering the relation between environmental factors and vegetation is an essential step in order to identify the effective factors in the habitats. The purpose of this study was to evaluate the relations between vegetation and soil characteristics in rangelands of Ferydounshahr (Sardab-Sibak...

Objective(s): Nowadays, nanoparticles bio production, considering their performance in medicine and biological science, is increasing. Green synthesis of metal nanoparticles using organisms has emerged as a nontoxic and ecofriendly method for synthesis of metal nanoparticles The objectives of this study were the production of silver nanoparticles using Avena sativa L. ...

پایان نامه :موسسه آموزش عالی غیردولتی رودکی تنکابن - دانشکده ادبیات و علوم انسانی 1394

this study was conducted to investigate the effect of favorite-text on iranian intermediate efl learners’ vocabulary development. sixty learners from nour-al-mahdi english institute participated in the present study. having been homogenized by oxford placement test (opt), they were randomly assigned into two groups of 30, control and experimental. then both groups sat for a pre-test which was a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

just as motivation is important in sla research, demotivation constitutes an important factor, too. there are many studies done on demotivation and burnout of teachers. many of these studies have been conducted on one or two aspects of english instruction. consequently, there are few studies which have been done on more than two aspects of english teaching. the aim of this study is to find out ...

ژورنال: سلامت کار ایران 2017

Background and aims: Monitoring workers' work ability, planning to maintain and improve the work ability, and identifying and controlling its related risk factors are of the most important issues in the field of occupational health. The object of this study was to investigate the influence of factors related to work ability among farmers. Methods: The subjects consisted of 213 male farmers. ...

Journal: :international journal of environmental research 0
m.m. serbaji université de sfax, ecole nationale d’ingénieurs de sfax - larsen, ur « etude et gestion des environnements côtiers et urbains », route soukra, km 3,5, bp 1173, 3038 sfax, tunisie c. azri université de sfax, faculté des sciences de sfax, département des sciences de la terre, ur « etude et gestion des environnements côtiers et urbains », route soukra, km 3,5, pb 1171, 3000, sfax, tunisie k. medhioub université de sfax, institut préparatoire aux etudes d’ingénieurs de sfax, ur « etude et gestion des environnements côtiers et urbains », route menzel chaker, km 1,5, bp 805, 3018 sfax, tunisie

eight selected heavy metals (cu, zn, pb, cd, cr, mn, fe and al) in surface and sub-surfacesediments in the northern coast of sfax (tunisia) were studied in order to assess the sediment quality and tohighlight the anthropogenic contributions to heavy metal distributions in the two study sediment levels.multiple chemometric approaches based on geographic information system (gis), enrichment facto...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1393

this study aimed at examining the effects of iranian efl learners’ anxiety, ambiguity tolerance, and gender on their preferences for corrective feedback (cf, henceforth). the effects were sought with regard to the necessity, frequency, and timing of cf, types of errors that need to be treated, types of cf, and choice of correctors. seventy-five iranian efl students, twenty-eight males and forty...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه امام رضا علیه السلام - دانشکده زبانهای خارجی 1393

writing an academic article requires the researchers to provide support for their works by learning how to cite the works of others. various studies regarding the analysis of citation in m.a theses have been done, while little work has been done on comparison of citations among elt scopus journal articles, and so the dearth of research in this area demands for further investigation into citatio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه محقق اردبیلی - پژوهشکده کشاورزی 1392

چکیده: در این تحقیق، برخی خواص فیزیکی و مکانیکی لوبیا قرمز به-صورت تابعی از محتوی رطوبت بررسی شد. نتایج نشان داد که رطوبت بر خواص فیزیکی لوبیا قرمز شامل طول، عرض، ضخامت، قطر متوسط هندسی، قطر متوسط حسابی، سطح تصویر شده، حجم، چگالی توده، تخلخل، وزن هزار دانه و زاویه ی استقرار استاتیکی در سطح احتمال 1 درصد اثر معنی داری دارد. به طوری که با افزایش رطوبت از 54/7 به 12 درصد بر پایه خشک طول، عرض، ضخام...

Journal: :کشاورزی (منتشر نمی شود) 0
غلام حسین عبداله زاده دانشجوی دکتری توسعه کشاورزی، دانشکده اقتصاد و توسعه دانشکده کشاورزی، دانشگاه تهران، تهران - ایران‏ خلیل ‏کلانتری دانشیار دانشکده اقتصاد و توسعه کشاورزی، دانشکده کشاورزی، دانشگاه تهران، تهران - ایران‏

in order to analyse the effective factors contributing to land fragmentation, required data ‎were collected by questionnaire from 151 farmers who were selected through a stratified random ‎sampling design from 12 villages of ramjerd yek subdistrict of marvdasht country. factor analysis ‎was used to identity explanatory factors of land fragmentation. the variables of natural-farming, ‎socio-cult...

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