نتایج جستجو برای: na 4359

تعداد نتایج: 266797  

صفاری, مهری, کشاورز, لیلا, گلکار, پوراندخت,

This experiment was conducted to evaluate the effects of salt stress on some agro-physiological traits in ten varieties of bread (Triticum aestivum L.) and durum (Triticum turgidum L.) wheats in seedling stage. A greenhouse experiment was carried out as a split plot experiment based on a completely randomized design with four replications in hydroponic condition. Different agronomic and physiol...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده کشاورزی 1388

تنش شوری تأثیر مخرب روی محصولات کشاورزی دارد. یکی از مکانیس های ممکن در تحمل به تنش شوری،ذخیره سدیم در واکویل می باشد. تجمع یون در واکویل دو فایده دارد:1)غلظت سمی سدیم در واکویل کاهش می یابد و 2)پتانسیل اسمزی واکویل افزایش می یابد و باعث افزایش فشار اسمزی و در نتیجه حفظ جذب آب توسط سلولهای گیاهی و نتیجتاً حفظ تورگر بافت می شود. در مطالعه حاضر دو زنوتیپ سیب زمینی، jubily zhokovo و skroplodny، توس...

Journal: :journal of agricultural science and technology 0
s. kranto department of plant science and agricultural resources khon kaen university muang, khon kaen 40002 thailand s. chankaew department of plant science and agricultural resources khon kaen university muang, khon kaen 40002 thailand t. monkham department of plant science and agricultural resources khon kaen university muang, khon kaen 40002 thailand p. theerakulpisut salt-tolerant rice research group department of biology, faculty of science, khon kaen university, khon kaen, 40002, thailand. j. sanitchon department of plant science and agricultural resources, faculty of agriculture khon kaen university, khon kaen, 40002, thailand.

screening methods that are effective in the early stage of growth will potentially provide the largest quantity of breeding material. although various screening methods under greenhouse have been proposed, potential effective approaches must be described a good correlation with results under field conditions. this study was aimed to assess the correlations between traits obtained from four salt...

Journal: :iranian journal of veterinary research 2014
a. p. salati s. ferrando a. movahedinia c. gambardella l. gallus

cyprinus carpio is a stenohaline species but can tolerate some ranges of changes in environmental salinities, so histomorphological methods and na+-k+ atpase and aquaporin 3 immunohistochemistry were performed on common carp kidney as an osmoregulatory organ in experimental groups and control in order to investigate their possible roles during salinity challenge. five groups of fish (n=25) with...

Journal: :iranian journal of catalysis 2014
farhad shirini masoumeh abedini ahmad nasiri abkenar bita baghernejad

a mild, efficient and fast method for the oxidation of alcohols and trimethylsilyl and tetrahydropyranyl ethers to their corresponding carbonyl compounds using cro3 in the presence of sulfonic acid functionalized ordered nanoporous na+-montmorillonite (sanm) and under solvent-free conditions is reported. all reactions were performed at room temperature in high to excellent yields. ease of the p...

ژورنال: :پرستار و پزشک در رزم 0
حامده خادم جهرمی گروه معارف اسلامی جلیل رجبی مرکز تحقیقات بیماریهای عفونی رحیم رئوفی جهرمی گروه عفونی

مقدمه: اعتیاد و سوء مصرف مواد یکی از ریشه دارترین و پیچیده ترین مسائل اجتماعی جوامع امروز می باشد که گستره ای جهانی پیدا کرده است. پژوهش حاضر با هدف بررسی تطبیقی قدمهای دوازده گانه گروه na با اصول و تعالیم اسلامی با روش پژوهش اسنادی صورت گرفته است. روش کار: این تحقیق، در رده تحقیقات کاربردی به حساب آمده؛ وبه عبارت دیگر به سمت کاربرد عملی دانش هدایت می شود. از نظر نحوه گردآوری داده ها، تحقیق حاض...

Journal: :آب و خاک 0
رقیه حمزه نژاد تقلیدآباد حبیب خداوردی لو شهرام منافی سالار رضاپور

abstract nowadays, environmental pollution by heavy metals is one of the most serious threats of the world which needs effective remediation actions. the aim of this study was to investigate the potential use of atriplex [atriplex verucifera], salicornia [salicornia europaea] and chenopodium album in simultaneous uptake and accumulation of na and cd or pb in two calcareous soils with different ...

Journal: :physiology and pharmacology 0
khoori vahid nayebpour mohsen dept. pharmacology, school of pharmacy, tehran university of medical sciences, tehran, iran naseri mohsen hoseinkhalehjir seyedgholamreza salehi aref

introduction: ouabaine is a well-known atrioventricular (av) node depressant agent, but its effects on functional properties of the av node have not been cleared. the aim of the present study was to determine how ouabaine administration modifies the rate-dependent properties of the av node. methods: selective stimulation protocols were used to quantify independently electrophysiological propert...

A. Gholamalizadeh Ahangar A. Rahimian Boogar E. Shirmohamadi

Salinity is a major limitation ecological factor for plant development in arid and semi-arid regions. The ionic imbalance, deficiency of nutrients and degradation of plant metabolites are caused by saline conditions, are affected by the reduction ratio of potassium (K) then sodium (Na). In this research foliar applications of humic acid (HA) for improve the absorption of K under salt stress was...

M. Rakhshi Mahdi Rezaei Sameti,

In the present study we focused on the electronic and structural properties of Na and Mg adsorption on the surface of the (6, 6) armchair SiCNTs. The adsorption energy (Eads), band gap energy (Eg), partial density of state (PDOS), chemical potential (μ), global hardness (η), electrophilicity index (ω), global softness (S), work function values (φ) and work function change (Δφ) are calculated by...

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