نتایج جستجو برای: adsorbent was produced by coprecipitation techniques then
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A 5’-deoxyadenosylcobalamin-agarose adsorbent has been prepared for the purification by affinity chromatography of enzymes which require 5’-deoxyadenosylcobalamin as a coenzyme. The synthesis involved the covalent attachment of cyanocobalamin to agarose through a 12 carbon chain. This hydrocarbon chain was attached to the corrin nucleus by reacting diaminododecane with cyanocobalamin e-carboxyl...
abstract this study examines the effect of teaching lexical inferencing strategies on developing reading comprehension skill of iranian advanced efl learners. participants were female students of meraj and shokouh institudes of garmsar a quasi-experimental design using two intact advanced classes of efl students at meraj and shokouh institutes. as the first step, a general toefl proficiency te...
the present study was an attempt to determine the types of motivation and levels of foreign language learning anxiety among efl students studying at azad and state universities in kermanshah and to determine the relationship between these two factors and language proficiency and gender. to this end, the foreign language learning motivation scale, by deci and ryan )1985(, were administered to 12...
in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...
the present study is paid to the evaluation of the welfare program of the unemployment insurance in iran. the main purpose which was the main reason for performing this thesis, was the unemployment insurance plan’s challenges in iran such as financial problems of this plan, prolongation of the credit receipt for some insured people, unemployment slow exiting from the unemployment insurance fund...
Nanocrystalline magnesium oxides were prepared by sol–gel method and were characterized by X-ray diffraction, N2-BET, SEM and infrared spectroscopy techniques. The results confirmed the formation of Nano- MgO materials with crystallite size in range of 5-20 nm and surface areas of 336-556m2/g. The product has been tested as destructive adsorbent for the decontamination of (2-chloroethyl) et...
the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...
In this work, a layered double hydroxide support modified with cadmium was synthesized by one-pot coprecipitation method. Then, it sulfured in different percentages solvothermal Next, the samples were analyzed using various characterization techniques like XRD, DRS, FTIR, N2 physisorption, PL spectroscopy, TEM, and SEM. Finally, uncalcined materials assessed hydrogen production from water metha...
In vitro adsorption of plasma proteins such as immunoglobulin (Ig)-G and IgM without the removal of albumin and fibrinogen forms the basis of the field of therapeutic immunoadsorption. In the present study, we investigated the activities of adsorbents with thienyl amino acids, tryptophan, or phenylalanine as ligands. IgG adsorption by an adsorbent with a thienyl amino acid ligand was lower than...
Animal bone charcoal (ABC) produced from animal bones was used as adsorbent to remove Cr(VI) from its aqueous solution . Labority experimental investigation was carried out to identify the effect of contact of time, pH, adsorbent dose and initial concentration on the adsorption of chromium from metal solution. Results showed that pH 2 was the most suitable, while the removal of Cr(VI) ions with...
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