نتایج جستجو برای: were employed in a randomized complete block design

تعداد نتایج: 20526725  

Journal: :تولیدات دامی 0
بهریه شاهی کارشناس ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه، ایران رسول پیرمحمدی دانشیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه،- ایران عبدالرحمان امینی دانشجوی دکتری، گروه علوم دامی، دانشکدة کشاورزی، دانشگاه ارومیه، ارومیه، ایران

the aim of this study was to evaluate the effects of different levels of citrus limon essential oil on nutrient digestibility, blood and ruminal metabolites in male holstein calves. this study were conducted using four male holstein calves, each fitted with a permanent rumen cannula (average body weight 650±20 kg) that received experimental diets including control with 600, 800 and 1000 mg/d le...

Journal: :دانش گیاه پزشکی ایران 0
مهدی رسائی فر ولی موسی نژاد

to evaluate the allelopathic effect of essential oil extracted from leaves of eucalyptus globules against some certain weeds and the possibility of that being employed in weed management strategies, laboratory and greenhouse studies were conducted in islamic azad university of khoy in 2007 in the framework of a factorial expreiment based on a randomized complete block design of four replication...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده علوم پایه 1388

introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...

Journal: :یافته های تحقیقاتی در گیاهان زراعی و باغی 0
سیما دامیار مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، کرج رعنا دستجردی مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، کرج

in order to study fruit  quality changes in apple cultivar gala, related to ripening stage and storage time, an experiment was conducted in a split plot arrangement in randomized complete block design with four replicationsin the area of damavand– jaban for three years. five levels of sampling times in storage were assigned to main plots, and three levels of harvesting times were randomized in ...

Journal: :علوم دامی ایران 0
وحید غلامی کارشناس ارشد، دانشگاه زنجان حمید امانلو دانشیار، دانشگاه زنجان

the aim followed in the present research was to study the effects of reduction in dietary crude protein on milk production and on blood components in lactating holstein dairy cows when in heat stress. a number of 63 holstein dairy cows (71 ± 16.5 dim) were chosen to be made use of in a randomized complete block design. the cows were randomly assigned to any one of the three experimental rations...

this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this study examined the effect of prior knowledge and vocabulary teaching on iranian efl learners listening comprehension. the current study has two purposes: one is to investigate the effect of background knowledge on the second language listening comprehension of iranian intermediates and the other is to determine whether second language is facilitated by the introduction of unknown vocabularies in the form of prelistening activities. to conduct the study different instruments such as listening proficiency test and four listening tests such as pre and posttests were used and various statistical processes and techniques including paired-sample t-test, and analysis of variance (anova) were used. the findings of this study supported all three hypotheses tested. differences were found between the means of preteaching vocabulary variable, the background knowledge activation variable, and mean difference between these two strategies variable. subjects scored higher when the unknown words were taught in advance. likewise, subjects scored higher when they were asked some relevant questions about the topic than on those without them. there was, in addition, a significant difference between the means of preteaching vocabulary strategy and background knowledge activation strategy. in fact, preteaching vocabulary had a better effect in enhancing the students’ listening comprehension, in comparison to background knowledge activation strategy.

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1390

this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this stud...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده زبانهای خارجی 1392

the purpose of this study was to investigate the impact of blended learning and multimedia softwares on iranian efl students vocabulary learning. in addition, the present study tried to examine the extent to which multimedia softwares can be applied into efl classes in iran. it also attempted to find out students attitudes toward using these softwares. to this end, 87 iranian efl learners at el...

Journal: :مرتع و آبخیزداری 0
محمدرضا پیرمرادی استادیارگروه علوم باغبانی، دانشکدة کشاورزی، دانشگاه ولی عصر(عج) رفسنجان، ایران محمد مقدم استادیار گروه علوم باغبانی، دانشکدة کشاورزی، دانشگاه فردوسی مشهد، ایران نوید یزدانی استادیار گروه علوم باغبانی، پردیس ابوریحان، دانشگاه تهران، پاکدشت، ایران

bitter asafetida (ferula assafoetida l.) is one of the medicinal-rangeland plants belonging to apiaceae family. the resin which is through incision secreted of the root has medicinal properties. the effect of rain on resin yield of this plant is one of problem of natural resources offices. the main aim of this study was to find out the effects of the irrigation on the resin yield, plants surviv...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - پژوهشکده علوم انسانی و اجتماعی 1391

abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده ادبیات و علوم انسانی 1391

abstract this study evaluates the iranian pre-university english textbook in terms of needs, objectives, content, and methodology. the study was designed on the qualitative- quantitative survey basis using interviews and questionnaires, a researcher-made textbook evaluation checklist and a needs analysis questionnaire. the textbook evaluation questionnaire was used in this study to elicit the ...

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