نتایج جستجو برای: ionic content

تعداد نتایج: 458718  

Journal: :physical chemistry and electrochemistry 0
mohammad faraji faraji department of chemistry, babol branch, islamic azad university, babol, iran ali farajtabar bdepartment of chemistry, jouybar branch, islamic azad university, jouybar, iran

the protonation constant values of salicylic and 5-nitrosalicylic acid werestudied by a combinationof spectrophotometric and potentiometric methods at 25 °c in wide range of ionic strength. the ionicstrength of solutions was kept constant by sodium perchlorate as background electrolyte at 0.10 to 3.0 moldm-3. potentiometer was calibrated according to gran method at each of ionic strength. the p...

Ahmed Ali Hullio, G.M. Mastoi

A direct and an efficient conversion of a wide range of primary, secondary even tertiary alcohols to the corresponding iodides have been achieved under ionic liquid conditions. The method involves preparation of ionic liquid-based iminium chloride intermediate from DMF-like ionic liquid then stirring it with alcohol in present of sodium iodide. The higher yields of alkyl iodides were obtained w...

Journal: :The Japanese journal of physiology 1969
N Akaike

CONWAY and HINGERTY1) showed that feeding of rats with K-free diet produced high Na and low K contents in muscle, the K loss being greater than the Na gain during a short time of K-deficiency, but that a further decrease in K content by feeding of K-free diets from 4 to 26 days was compensated by an equivalent gain of Na. COOKE et al.2) demonstrated also in the rat skeletal muscle made K-defici...

Journal: :journal of physical & theoretical chemistry 2010
morteza keshavarz

in this research, the interaction of hexadecyl trimahyl ammonium bromide (htab) with enzyme ureasehas been investigated comprehensively at different experimental conditions such as ionic strength, proteinconcentration using ion selective membrane electrode of surfactants. the obtained binding isotherms frompotentiometnc studies have been analyzed by different theories such as wyman binding pote...

2017
Tarek Alammar Igor Slowing Jim Anderegg Anja Mudring Igor I. Slowing

Nanocrystalline Sr1−xBaxSnO3 (x=0, 0.2, 0.4, 0.8, 1) perovskite photocatalysts were prepared by microwave synthesis in an ionic liquid (IL) and subsequent heat-treatment. The influence of the Sr/Ba substitution on the structure, crystallization, morphology, and photocatalytic efficiency was investigated and the samples were fully characterized. On the basis of X-ray diffraction results, as the ...

Mona Iravaninia S. Rowshanzamir,

In present research work, anion exchange membranes based on quaternized polysulfone with ammonium cation moieties (QAPSF) were prepared by chloromethylation, amination and alkalization. The chloromethylated polysulfone were characterized by 1HNMR spectroscopy and functionalization degree was determined according to peak area integration. Ion transport properties (ionic conductivity, ion exchang...

ژورنال: مواد پرانرژی 2014

.Energetic ionic liquids compared to conventional high energy compounds, such as TNT, HMX and RDX has a low vapor pressure, high thermal stability and adjustable chemical and physical properties and high being liquid range. A new class of ionic salts that have a large number of nitrogen on their structure have distinctive characteristics such as high heat of formation and high viscosity, comp...

Journal: Desert 2019
B. Biró F. Shekari, G. Végváric M. Ansari M.H. Mohammadi

Salinity stress is a brutal environmental stress which decreases the yield production of plants. Questions rise on which of the ionic stress or lack of water has deleterious effects on plants forage dry yield. Also, questions remain on whether the K+ reduction or Na+ accumulation is more important in forage dry yield reduction under salinity stress. The present experiment was conducted to answe...

Journal: :archives of razi institute 2016
h. zolfagharian m. damavandi n. mohammadpour dounighi s. moradi

in recent years, chitosan nanoparticles have been studied widely for protein delivery. in this study, hemiscorpius lepturus (hl) venom was encapsulated in chitosan nanoparticles. the aim of the present work was to carry out a systematic study for preparing biocompatible and biodegradable nanoparticles for loading hl scorpion venom and to evaluate their potential as an antigen delivery system. i...

Journal: :علوم باغبانی 0
مسعود باقری زاده فریده آل بوعلی حمید صادقی شورانگیز جوانمردی

in this complete random block study we aimed to assess the morphologic reactions of petunia under water deficiency. we used four irrigation treatments (irrigation amount of 25%, 50%, 75%, and 100% of the field's irrigation capacity. the study consisted of 8 repetitions during 6 months in the greenhouse. data were analyzed using spss software, version 12.0 and the mean data were compared with ea...

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