نتایج جستجو برای: oxidation
تعداد نتایج: 117356 فیلتر نتایج به سال:
The vanadium-based catalyst, acts as a homogeneous catalyst for the selective oxidation of various kinds of sulfides with 30% aqueous H2O2. Vanadium-based catalyst was successfully used as the oxygen source for the oxidation of sulfides to sulfoxides for the first time. The sulfoxides were obtained in a good way to high yields without any detectable over-oxidation to sulfones under normal condi...
آلومینیوم بدلیل خواص منحصر به فردی نظیر استحکام ویژه بالا، دانسیته پایین و نیز فراوانی در پوسته زمین از مهم ترین مواد مهندسی بوده و دارای کاربردهای متنوعی شامل صنعت هوافضا، خودرو و ساختمان است. اما برخی عیوب ذاتی آن نظیر سختی پایین، مقاومت سایشی پایین و نیز مقاومت به خوردگی پایین، کاربرد وسیع و طولانی مدت آن را در صنعت محدود نموده است. راههای متعددی برای غلبه بر این عیوب پیشنهاد شده است که از ا...
the perovskite-structured la2cuo4 nanoparticles (lco nps) have been synthesized via an ultrasonic-assisted co-precipitation route using octanoic acidas organic surfactant, and the phase composition, morphology, lattice parameters and size of nanoparticles are characterized through fourier transform infrared spectroscopy (ft-ir), x-ray diffraction (xrd), scanning electron microscopy (sem) and t...
background: koobideh kebab (barbequed minced meat) is one of the most popular iranian foods. reduction in the water holding capacity (whc) of meat during thermal processing makes the water and melted fat run out of the meat. the fat content of the final product depends on the proportion of the retained moisture and fat. meanwhile, high temperature and the presence of oxygen and iron in meat may...
چکیده ندارد.
dehulling is an important step in walnut processing that has considerable effect on the quality, chemical and microbial properties of walnuts. improving dehulling can increase the quality of the final product. this research studied the effect of genotype and hulling method on walnut properties. one experiment was performed as a factorial in a randomized complete block design with three replicat...
an efficient protocol for the selective oxidation of primary alcohols to aldehydes withh5io6/v2o5 in ionic liquid [bmpy][pf6] has been developed. high yields of the products, mildreaction conditions and simple experimental procedure make this protocol complementary tothe existing methods. the catalyst can be reused for several times without obvious loss of thecatalytic activity.
photo-catalytic activity of zno supported on h-zsm-5 zeolite to reduce cr(vi) from aqueous solutions
abstract aims: the application of photocatalytic processes to remove heavy metals in aqueous solutions and industrial wastewater are regarded as extremely effective, clean and without producing waste methods. the goal of the present study was to investigate the photocatalytic activity of zno based on h-zsm-5 zeolite support. materials & methods: zno/h-zsm-5 composite synthesized by impregnation...
In this research, we reported a novel modified carbon ceramic electrode (CCE) using Ni/Al Layered double hydroxide as modifier was fabricated by sol-gel technique. The Ni/Al Layered double hydroxide modified sol gel derived carbon ceramic (Ni/Al LDH-SGD-CC) electrode was used for electrocatalytic oxidation of acetaldehyde. The oxidation of acetaldehyde happens at the potential where Ni (III) sp...
This study presents a review on advanced oxidation processes (AOP) for simultaneous removal of NO and SO2. AOP is based on using a strong oxidant such as ozone and H2O2 which is able to generate highly reactive intermediates. The pollutant will be oxidized and removed by these intermediates. In recent years, AOP has been considered as an effective and attractive technology in the field of flue ...
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