نتایج جستجو برای: s i l i c a

تعداد نتایج: 14200971  

Journal: :مهندسی بیوسیستم ایران 0
داود ثواقبی فیروزآبادی کارشناس ارشد، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران کرامت اله رضایی استاد، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمد صفری استاد، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران پرویز اشتری پژوهشگاه علوم و فنون هسته ای، پژوهشکده چرخه سوخت هسته ای

enzymatic acidolysis of canola oil through caprylic and capric acids was investigated for making structured lipids. lipozyme tl im, an sn-1,3 specific thermomyce slanuginosa lipase, was utilized as the biocatalyst in the batch reactor. reaction conditions were designed according to taguchi’s method considering fatty acid to oil ratio, at three levels (1:1, 2:1, 3:1) , enzyme load (4, 8 and, 12%...

Journal: :محیط زیست طبیعی 0
آزاده صالحی دانشگاه تربیت مدرس مسعود طبری کوچکسرایی دانشگاه تربیت مدرس، دانشکده منابع طبیعی و علوم دریایی ابراهیم محمدی گل تپه دانشگاه تربیت مدرس، دانشکده کشاورزی انوشیروان شیروانی دانشگاه تهران، دانشکده منابع طبیعی

with the aim to examine lead tolerance of populus nigra (clone 62/154) in symbiosis with arbuscular mycorrhizal fungi, a greenhouse experiment was carried out in a factorial randomized complete scheme with two factors 1) fungal inoculation in 4 levels (control, inoculation with glomus mosseae, inoculation with g. intraradices and inoculation with g. mosseae + g. intraradices) and 2) lead in 4 l...

Journal: :iranian journal of otorhinolaryngology 0
alireza lotfi hematology and oncology research center, tabriz university of medical sciences, tabriz, iran. gholamreza bayazian department of otorhinolaryngology, hazrat rasool hospital, faculty of medicine, iran university of medical sciences, tehran, iran. shahin abdollahifakhim department of otorhinolaryngology, imam reza hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. nikzad shahidi department of otorhinolaryngology, imam reza hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. rasoul estakhri department of pathology, imam reza hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. ali esfahani hematology and oncology research center, tabriz university of medical sciences, tabriz, iran.

introduction: the clinical outcome of patients with squamous cell carcinoma (scc) located in the head and neck has remained poor despite ongoing advances in diagnosis and management. interleukin-6(il-6) is a multi-functional cytokine that plays an important role in the process of cell differentiation and is increased in several malignancies. the aim of this study was to investigate the serum le...

Journal: :علوم باغبانی ایران 0
سمیه کوکبی دانشجوی کارشناسی ارشد دانشکده کشاورزی دانشگاه تبریز سید جلال طباطبایی استاد تغذیه معدنی گیاهی دانشکده کشاورزی دانشگاه تبریز رحیم نقش بند حسنی استادیار دانشکده کشاورزی دانشگاه تبریز

effects of different k/ca ratios on the growth, yield and physiological characteristics in galia (cucumis melo var. reticulatus l. naud. cv. galia) grown in hydroponics were evaluated. the experiment was arranged in a completely randomized design of three replicates. melon seeds were sown in a medium containing perlite and vermiculite (3:1 v:v) and then irrigated with water containing different...

Journal: :پژوهش های تولید گیاهی 0
زهرا صفری محمدیه دانشگاه فردوسی مشهد محمد مقدم هیات علمی دانشگاه فردوسی مشهد بهرام عابدی دانشگاه فردوسی مشهد لیلا سمیعی دانشگاه فردوسی مشهد

abstract background and objectives: soil salinity is one of the most important limited factors of plant productions. physiological drought resulting from salinity stress is one of the main reasons of limiting water absorption from soil. moreover, increasing the salt absorption by plants cause to disorder in physiological and cellular processes. spearmint (mentha spicata l.) is from lamiaceae fa...

Journal: :iranian chemical communication 2016
abdolkarim zare mahshad rezaei alireza hasaninejad

a highly efficient and simple method for the preparation of α,α´-bis(arylidene)cycloalkanones under solvent-free conditions has been developed. the crossed-aldol condensation of cycloalkanones (1 eq.) with arylaldehydes (2 eq.) in the presence of 2.5 mol% of ionic liquid 1,3-disulfonic acid imidazolium hydrogen sulfate {[dsim]hso4} afforded the title compounds in high yields and short reaction ...

Journal: :iranian journal of microbiology 0
v javid khojasteh department of bacteriology, guilan university of medical sciences, faculty of shahid beheshty, rasht, iran. ha foster center of parasitology and disease reserch, school of environment and life sciences, university of salford, the crescent, salford m5 4wt, uk.

objective : the aim of study was to develop a rapid assay, dye labelled monoclonal antibody assay (dlmaa), using non-radioactive organic synthetic dyes for identification of toxic shock syndrome toxin-1 (tsst-1) producing strains of staphylococcus aureus. materials and methods: the assay protocol required only two simple steps; addition of tsst-1 antigen to a nitrocellulose membrane and then ad...

Journal: :iranian journal of allergy, asthma and immunology 0
sabir hussain department of biosciences, comsats institute of information technology, park road, chak shazad, islamabad-44000, pakistan. tahir iqbal department of internal medicine, shifa college of medicine, shifa international hospital, h-8/4, islamabad, 44000 pakistan. irfan sadiq department of biosciences, comsats institute of information technology, park road, chak shazad, islamabad-44000, pakistan. saima feroz department of biosciences, comsats institute of information technology, park road, chak shazad, islamabad-44000, pakistan. humayoon shafique-satti department of hematology/medicine, armed forces bone marrow transplant centre, rawalpindi, 46000 pakistan.

interleukin-8 (il-8) is a well-known inflammatory chemokine and suggested to be involved in the development of acne vulgaris. this study investigates il-8 plasma levels in acne patients and healthy controls and the molecular basis for the regulation of the il-8 gene in a pakistani population.patients with acne vulgaris (n=264) and healthy individuals (n=264) were enrolled in this investigation....

Journal: :iranian journal of catalysis 2015
mahdieh chegeni ardeshier khazaei sadegh rahmati mohammad hossein fekri

in this report, synthesis, characterization and application of silica perchloric acid nanosphere as a novel and heterogeneous catalyst is described. these nanospheres have been characterized by xrd, ft-ir, bet and tga spectra and also by sem and tem images. the results show that it has a spherical shape and the particles size are between 75 and 100 nm. the catalytic activity has been investigat...

Journal: :iranian journal of catalysis 2015
saeid azimi mohammad ali zolfigol ahmad reza moosavi-zare

friedel–crafts synthesis of triarylmethanes over 3-methyl-1-sulfonicacid imidazolium tetrachloroaluminate under green conditions:in this work, friedel–crafts (fc) alkylation of various arenes with aromatic aldehydes catalyzed by 3-methyl-1-sulfonic acid imidazoliumtetrachloroaluminate {[msim]alcl4}, as a green catalyst, to prepare triarylmethanes (tams) has been carried out. some aromatic aldeh...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید