نتایج جستجو برای: a completely randomized design experiment was conducted over 120 one

تعداد نتایج: 14109326  

Journal: :پژوهش های تولید گیاهی 0
مصطفی زنگوئی فارغ التحصیل/ دانشگاه بیرجند سهیل پارسا عضو هیئت علمی/دانشگاه بیرجند سهراب محمودی عضو هیئت علمی/دانشگاه بیرجند مجید جامی الاحمدی عضو هیئت علمی/دانشگاه بیرجند

asafoetida is one of important medicinal plant of the apiaceae family that due to over harvesting from natural pastures has been endanger to elimination. knowledge and studies of plant biology and germination behavior can lead to the development of its cultivation and protection in the natural pastures. this experiment was conducted to evaluate asafoetida seeds germination on the response to te...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده ادبیات و علوم انسانی 1389

current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده ادبیات و علوم انسانی 1390

abstract: advertisements are the most accessible type of authentic materials, and this is one reason why they are used more and more in english teaching classes. for this cause, studies in the field of advertisements are very widespread nowadays. for pun is one aspect which makes advertisements more interesting, it is used more than before in advertisements. use of puns makes an advertisement m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1392

in the area of vocabulary teaching and learning although much research has been done, only some of it has led to effective techniques of vocabulary teaching and many language learners still have problem learning vocabulary. the urge behind this study was to investigate three methods of teaching words. the first one was teaching words in context based on a traditional method of teaching that is,...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ادبیات و زبانهای خارجی 1391

the purpose of this thesis was to investigate how differently metacognitive, cognitive, and social/affective strategies affect l2 learners’ reading comprehension. to this end, the study employed a quasi-experimental design with a placement test as a proficiency test to find the homogeneity of groups. three classes were randomly selected as the experimental groups (n =90), and each class was tau...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم پایه 1392

a novel and ultra low cost isfet electrode and measurement system was designed for isfet application and detection of hydronium, hydrazinium and potassium ions. also, a measuring setup containing appropriate circuits, suitable analyzer (advantech board), de noise reduction elements, cooling system and pc was used for controlling the isfet electrode and various characteristic measurements. the t...

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

abstract the present study was conducted to investigate the effectiveness of a rather newly developed method in language teaching that is the use of paragraph reading task and whole reading task and their effects on improving efl learner’s speaking ability. to fulfill the purpose of the study, first 90 participants studying their course at sa eedi high school in tehran were chosen by means of ...

Journal: :تحقیقات دامپزشکی 0
حسین ابراهیمی گروه علوم طیور، دانشکده کشاورزی دانشگاه تربیت مدرس، تهران-ایران شعبان رحیمی گروه علوم طیور، دانشکده کشاورزی دانشگاه تربیت مدرس، تهران-ایران پژواک خاکی بخش میکروبشناسی، موسسه تحقیقات واکسن و سرم سازی رازی، کرج- ایران

background: outbreak and spread of bacterial infections resulted in increasing use of antibiotics which subsequently leaded to bacterial resistance to conventional antibiotics. objectives: to evaluate the effects of organic acids (selko-ph®), probiotic (primalac®) and echinacea purpurea (ep) alcoholic extract on the immune system of the broiler chickens, a completely randomized design experimen...

Journal: :تحقیقات دامپزشکی 0
سیامک سیاه پور گروه پرورش و تولید طیور،دانشگاه تربیت مدرس محمد امیر کریمی ترشیزی گروه پرورش و تولید طیور،دانشگاه تربیت مدرس فرید شریعتمداری گروه پرورش و تولید طیور،دانشگاه تربیت مدرس فریدون نیک نفس واحد تحقیق و توسعه شرکت زربال

poultry requirments for vitamins and minerals are met from two sources feed ingredients and premixes.in practical poultry nutrition, the role of feed ingredients is over looked. this experiment was conducted to evaluate the effects of the time of vitamin and mineral premixes withdrawal on growth and economic performance of broilers. four hundred and fifty, one day-old male broiler chickens (ros...

Journal: :علوم باغبانی 0
هانیه هادیزاده علی تهرانی فر محمود شور سیدحسین نعمتی

abstract paclobutrazol is one of the most important triazolic compounds which are used as growth retardants in some crops. in this study, the effect of application methods and concentration of paclobutrazol on plant height of tuberose and possibility of pot production was investigated. in the first experiment, tuberose bulbs were soaked in 0, 25, 50, 75 and 100 mg.l-1 paclobutrazol for 10, 20 a...

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