نتایج جستجو برای: microwave mw

تعداد نتایج: 65642  

Journal: :Tarim Bilimleri Dergisi-journal of Agricultural Sciences 2022

In this study, fruits of black Myrtus communis L. were subjected to different preservation methods (frozen, sun and microwave dried) and, its biochemical properties examined. It was observed that the vitamin levels decreased in (MW) dried samples (p

Journal: :Acta poloniae pharmaceutica 2016
Paweł Ramos Małgorzata Pieprzyca Barbara Pilawa

Complex free radical system in thermally sterilized acidum boricum (AB) was studied. Acidum boricum was sterilized at temperatures and times given by pharmaceutical norms: 160 degrees C and 120 min, 170 degrees C and 60 min and 180 degrees C and 30 min. The advanced spectroscopic tests were performed. The EPR spectra of free radicals were measured as the first derivatives with microwaves of 9.3...

Journal: :تحقیقات نظام سلامت 0
رضا تاجیک دانشجوی دکتری، گروه مهندسی بهداشت حرفه ای، دانشکده علوم پزشکی ،دانشگاه تربیت مدرس، تهران، ایران حسن اصیلیان مهابادی . استادیار، گروه مهندسی بهداشت حرفه ای، دانشکده علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران علی خوانین دانشیار، گروه مهندسی بهداشت حرفه ای، دانشکده علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران احمد جنیدی جعفری دانشیار، گروه مهندسی بهداشت محیط، دانشکده علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران بابک عشرتی استادیار، گروه آمار و اپیدمیولوژی، دانشکده بهداشت، دانشگاه علوم پزشکی اراک، اراک، ایران اردلان سلیمانیان کارشناس ارشد، مسؤول آزمایشگاه بهداشت حرفه ای، دانشکده علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران

background: polychlorinated biphenyls (pcbs) are occupational and environmental pollutants and hazardous organic compounds that have created major environmental and occupational challenges. pcb compounds have different health effects in humans depending on sex, age, route of entry, intensity, and frequency of exposure. this study was conducted to determine the effect of microwave rays, hydrogen...

2015
Bai-Liang Xue Jia-Long Wen Run-Cang Sun

Lignin-based polyols were synthesized through microwave-assisted liquefaction under different microwave heating times (5-30 min). The liquefaction reactions were carried out using polyethylene glycol (PEG-400)/glycerol as liquefying solvents and 97 wt% sulfur acid as a catalyst at 140 °C. The polyols obtained were analyzed for their yield, composition and structural characteristics using gel pe...

2017
Akira Yabuki Mariko Sawa Moeko Kohyama Takeshi Hamamoto Osamu Yamato

BACKGROUND Renal biopsy is an essential tool for the diagnosis of proteinuric kidney diseases in dogs, and evaluation of immune complexes (IC) by immunofluorescence (IF) of frozen sections (IF-F) is required for the diagnosis of IC-mediated glomerulonephritis (ICGN). However, the use of frozen sections from renal biopsies can have limitations. The aim of this study was to develop a reliable IF ...

2013
V Surducan E Surducan D Dadarlat

Microwave radiation is widely used for heating tissues in hyperthermia or diathermy medical treatments. Usually, in such treatments, the tissue’s temperature is used as feedback for the microwave generator power control and consequently, for the control of the whole heating process. The temperature can be measured by contact, or non-contact (IR or MW radiometry), techniques. Unfortunately, in b...

Journal: :Journal of Solid State Chemistry 2022

Perovskite La 0.3 Ca 0.7 Fe Cr O 3-? (LCFCr) is a mixed ionic and electronic conductor (MIEC) that can be employed as an electrode material in reversible solid oxide fuel cells (RSOFCs). In this work, ultra-fast (15 ?min) one-step microwave (MW)-assisted combustion synthesis route has been developed to obtain phase pure highly crystalline LCFCr powder. The synthesized powders exhibited sponge-l...

Journal: :Molecules 2013
Zecheng Yang Xuedun Niu Xuedong Fang Ge Chen Hong Zhang Hong Yue Lei Wang Dantong Zhao Zhi Wang

Enantioselective esterification of ibuprofen has been successfully carried out in an organic solvent catalyzed by recombinant APE 1547 (a thermophilic esterase from the archaeon Aeropyrum pernix K1). Here we used microwave irradiation (MW) as the mode of heating to improve the enzyme performance. Under the optimum conditions, the enzyme activity of APE 1547 was 4.16 μmol/mg/h and the enantiosel...

2017
Mahrzadi Noureen Shahi Muhammad Arshad Aman Ullah

Solvent-free copolymerization of epoxides derived from fatty esters of waste cooking oil with phthalic anhydride using (salen)CrIIICl as catalyst and n-Bu₄NCl/DMAP (tetrabutylammonium chloride/4-(dimethylamino)pyridine) as co-catalysts was carried out for the first time under microwave irradiation, where reaction time was reduced from a number of hours to minutes. The polyesters were obtained w...

Journal: :Molecules 2008
Giancarlo Cravotto Emanuela Calcio Gaudino Luisa Boffa Jean-Marc Lévêque Julien Estager Werner Bonrath

Non-conventional techniques, such as microwave (MW) and power ultrasound (US) as well as combined MW/US irradiation, have been used to promote one-pot synthesis of second-generation ionic liquids (ILs), cutting down reaction times and improving yields. However, the use of chloroalkanes in the alkylation of N-heterocycles requires more drastic conditions if results are to match those obtained wi...

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