نتایج جستجو برای: microwaveassisted synthesis

تعداد نتایج: 409264  

2015
Jiulong Xie Chung-Yun Hse Todd F. Shupe Tingxing Hu

Lignocellulosic biomass (Moso Bamboo, Chinese tallow tree wood, switchgrass, and pine wood) was subjected to a novel delignification process using microwave energy in a binary glycerol/methanol solvent. The physicochemical properties of the recovered lignin were analyzed prior to its application in the fabrication of polylactic acid (PLA)–lignin composites. The results showed that the samples h...

2016
Jiulong Xie Chung-Yun Hse Todd F. Shupe Hui Pan Tingxing Hu

Microwave-assisted selective liquefaction was proposed and used as a novel method for the isolation of holocellulose fibers. The results showed that the bamboo lignin component and extractives were almost completely removed by using a liquefaction process at 120 8C for 9 min, and the residual lignin and extractives in the solid residue were as low as 0.65% and 0.49%, respectively. Increasing th...

2013
Prafulla D. Patil Veera Gnaneswar Gude Harvind K. Reddy Tapaswy Muppaneni Shuguang Deng

A comparative study of biodiesel production from waste cooking oil using sulfuric acid (Two-step) and microwaveassisted transesterification (One-step) was carried out. A two-step transesterification process was used to produce biodiesel (alkyl ester) from high free fatty acid (FFA) waste cooking oil. Microwave-assisted catalytic transesterification using BaO and KOH was evaluated for the effica...

2010
Dong Zhu Xiaoxing Jiang Cuie Zhao Xiaolian Sun Jianrong Zhang Jun-Jie Zhu

Recently, the synthesis of low-toxic quantum dots (QDs) and their application in biomedicine have attracted considerable attention. ZnSe nanocrystals doped with Mn ions which do not contain any Class A element (Cd, Pb, and Hg) can be used as a new generation of luminescent nanocrystals due to their strong dopant emission. In 2001, Norris et al. presented an organometallic synthetic route for th...

Journal: :Indian Journal of Pharmaceutical Education and Research 2021

Abstract: Aim/Background: The safe and complete extraction of flavonoids from plant material influenced by various factors has been ever challenging for the researchers. study was planned to optimize nucifera seeds their antioxidant activity. Materials Methods: were extracted at combination four including particle size flour in terms sieve number (SN), microwave treatment time (MTT), concentrat...

2010
Yourui Suo Lingyun Wang

The seed lipid of Nitraria tangutorum was extracted by supercritical carbon dioxide extraction, microwaveassisted reflux extraction, ultrasound-assisted extraction, or solvent reflux extraction. The experimental parameters of supercritical carbon dioxide extraction including pressure, temperature, particle size, and extraction time were investigated. A facile and sensitive method for the simult...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یاسوج - دانشکده علوم پایه 1390

چکیده پلاتین، فلزی نجیب، پایدار و گران قیمت با خاصیت کاتالیزوری زیاد است که کاربرد های صنعتی فراوانی دارد. کمپلکس های پلاتین(ii) به عنوان دارو های ضد سرطان شناخته شدند و در شیمی درمانی بیماران سرطانی کاربرد دارند. خاصیت کاتالیزوری و عملکرد گزینشی پلاتین مستقیماً به اندازه و- شکل ماده ی پلاتینی بستگی دارد. بعضی از نانو ذرات فلزی در سطح مشترک مایع- مایع سنتز شده اند، اما نانو ساختار های پلاتین ب...

Journal: :international journal of nano dimension 0
s. abdeen department of nanotechnology, noorul islam university, kumaracoil, tamil nadu, india. s. geo department of microbiology, noorul islam college of arts and sciences, tamil nadu, india s. sukanya department of biotechnology, noorul islam college of arts and sciences, tamil nadu, india p.k. praseetha department of nanotechnology, noorul islam university, kumaracoil, tamil nadu, india r.p dhanya department of microbiology, noorul islam college of arts and sciences, tamil nadu, india

silver is composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. silver nanoparticles have been a potent antibacterial, antifungal, anti-viral and anti-inflammatory agent. a simple, eco-friendly, inexpensive biosynthetic method was employed to synthesize silver nanoparticles.  the present study aimed at the comparative study of silver nanopartic...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم 1371

we describe here a suitable approach for the synthesis of n-unsubstituted monocyclic b-lactams under mild reaction conditions by the annelation of imines with substituted acetylchlorides. in this method the reaily available phtalimidoacetyl chloride were allowed to react with - dibenzylideneiminotoluene (hydrobenzamide) in the presence of an equimolar amount of triethylamine in refluxing toluen...

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