نتایج جستجو برای: number of stem

تعداد نتایج: 21219678  

Ali Babaei, Attiyeh Vasaghi Mojtaba Habibagahi Tahereh Talaei-Khozani, Zahra Vojdani

Objective(s): Umbilical cord blood is a good source of the mesenchymal stem cells that can be banked, expanded and used in regenerative medicine.  The objective of this study was to test whether amniotic membrane extract, as a rich source of growth factors such as basic-fibroblast growth factor, can promote the proliferation potential of the umbilical cord mesenchymal stem cells. Materials and ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده ادبیات و علوم انسانی 1391

with the introduction of communicative language teaching, a large number of studies have concerned with students’ oral participation in language classrooms. although the importance of classroom participation is evident, some language learners are unwilling to engage in oral activities. this passivity and unwillingness to participate in language classroom discussions is known as “reticence”. rev...

پایان نامه :0 1374

in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...

باقری, محمدامین , کاظمی تبار, سید کمال ,

Okra (Abelmoschus esculentus L.) is the only vegetable crop of significance among Malvaceae family and is commonly cultivated in tropical and subtropical regions of the world. Mutation induction has been accepted as a useful tool in plant breeding programs to provide maximum inheritable variability. To investigate the effects of Ethyl Methane Sulfonate (EMS) on variation induction on agronomic ...

Journal: :حفاظت گیاهان 0
نعمت اله صداقت همت اله پیردشتی سیده ارحامه فلاح شمسی عبدالرضا رنجبر سحر لیلایی

in order to study the effects of foliar application of si (5/1000 ratio), k (2/1000 ratio) and zn (2/1000 ratio) on rice (cv. tarom hashem), an on-farm experiment carried out based on randomized complete block design with three replications in 2012. some traits such as paddy yield and yield components, neck blast disease and stem borer damage were evaluated. results showed that the effect of fo...

Journal: :به نژادی گیاهان زراعی و باغی 0
عبدالله حسن زاده قورت تپه استادیار، بخش اصلاح تهیۀ نهال و بذر، مرکز تحقیقات کشاورزی و منابع طبیعی استان آذربایجان غربی، ارومیه، ایران حسین عباسی هولاسو کارشناس ارشد اصلاح نباتات، گروه اصلاح نباتات و بیوتکنولوژی، دانشکدۀ کشاورزی، دانشگاه ارومیه، ارومیه، ایران محمد رضا عباسی مربی، بخش اصلاح تهیۀ نهال و بذر، مرکز تحقیقات کشاورزی و منابع طبیعی استان خراسان رضوی، مشهد، ایران

this experiment was conducted to investigate the genetic diversity, relationship between morphological, agronomic and qualitative traits and to identify components of forage yield using some multivariate statistical methods in local sainfoin populations. the experiment was conducted as randomized complete block design with three replications in agricultural and natural resources research center...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...

Journal: :جنگل و فرآورده های چوب 0
محمود بیات دکتری جنگل داری، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران منوچهر نمیرانیان استاد دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران محمود زبیری استاد دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران

the oriental beech constitute one third of northern forests area and stocking volume in the north ofiran. these stands obseve in pure and mixed. in order to properly management which guaranteesustained yield, it is crucial to collect basic information including stocking (volume and stem number),tree growth, diameter distribution pattern, diameter-height relationship, diameter-volume relationshi...

Journal: :cell journal 0

cord blood is a rich source of hematopoietic stem cells and could be potentially used for transplantation instead of conventional sources of stem cells (bone marrow or peripheral blood). cord blood cells are successfully used in pediatric and adult patients, but their major limitation is the low number of hematopoietic stem cells for patients of large body size. there are several possible solut...

Extended abstract Introduction and Objective: In order to increase the motivation of farmers to cultivate open pollinated oilseed rape cultivars, new cultivars with appropriate yields should be introduced. Also, due to the effects of climate change, increase in temperature, early arrival of heat and intensification of drought stress at the end of the season in the warm and dry regions, it is a...

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