نتایج جستجو برای: microwave assisted approach

تعداد نتایج: 1448043  

2011
Biren. N. Shah Avinash. K. Seth

A microwave assisted extraction technique was developed to optimize the extraction of mucilage from the fruits of Abelmoschus esculentus plant. The plant has been extracted by conventional and microwave assisted methods for the isolation of mucilage. Microwave extraction at 160 W intensity and 40 min heating duration increase 11.55% in the yield of mucilage when compared to 1 h conventional hea...

2014
Dušan Ž. Mijin Jelena M. Marković Danijela V. Brković Aleksandar D. Marinković

2-Pyridones are important heterocyclic compounds that are widely used in medical chemistry, and their various derivatives have significant biological and medical applications. In this paper, the synthesis of 2-pyridones as well as 2-pyridone-based compounds, such as 2-quinolones, using microwave assisted organic chemistry is reviewed. The review is divided in three parts. In the first part, mic...

Journal: :Journal of neuroscience methods 2004
Teresa Elena Muñoz Richard T Giberson Richard Demaree Jonathan R Day

Advances in microwave technology permitted the development of new antigen labeling techniques. The recent microwave development of a true variable wattage unit designed for laboratory use and an apparatus for dampening standing wave radiation patterns have allowed investigators to better control the conditions within a microwave cavity. Thus, operating limits thought to be endemic to microwave-...

2011
Ming Liu Bo Kong Fengdan He Wenxiang Hu

This paper mainly described the new instruments of microwave-promoted organic synthesis which were appraised, and several microwave-assisted synthetic reactions, such as esterification reaction, orthogonal experimental design and fentanyl synthetic reactions. In comparison with traditional methods of organic synthesis, microwave-assisted chemistry could make high-speed processing of chemical tr...

Journal: :Molecules 2010
Robert M Gengan Pitchai Pandian Chandraprakash Kumarsamy Palathurai S Mohan

An efficient synthesis of a methyl derivative of the indoloquinoline alkaloid cryptosanguinolentine based on microwave-assisted reactions is described. The microwave-assisted synthesis of an intermediate 4-hydroxy-2-methylquinoline yielded 86% of the desired product and other intermediates prepared yielded high % of products in shorter reaction times, under optimum conditions, as compared to tr...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده علوم پایه 1391

پلی کربنات یکی از پلاستیکهای مهمی است که به صورت گسترده در تولید لوحهای فشرده، قطعات رایانه، مواد ساختمانی و غیره مورد استفاده قرار می گیرد. این پلیمر بصورت عمده از تراکم مونومر بیس فنولa (bpa) و کربنیل کلرید یا دی متیل کربنات ها بدست می آید. در سالهای اخیر بازیافت شیمیایی پلی کربنات بیشتر مورد توجه بوده است. بازیافت شیمیایی پلی کربنات برای بدست آوردن مواد اولیه آن با روشهای متفاوتی مانند تجزی...

2015
Y. M. Zhao J. Wang H. B. Liu C. Y. Guo W. M. Zhang

Microwave-assisted extraction was used for the extraction of alantolactone and isoalantolactone from Inula helenium. Effects of various experimental factors including ethanol concentration, particle size, microwave radiation time, the ratio of material to liquid and extraction temperature on yield of alantolactone and isoalantolactone were evaluated. The optimal extracting process of the alanto...

Journal: :Chemical communications 2013
Weibin Liang Deanna M D'Alessandro

Zirconium oxide based Metal-Organic Frameworks were synthesised using a rapid and efficient microwave-assisted solvothermal method that produced purer phases and higher quality crystalline products in significantly (>95%) less time than the conventional heating method. A new amino-functionalised analogue has been synthesised exclusively using this microwave-assisted methodology.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2011
nazila esmaeili hossein kazemian dariush bastani

this mini review article, intends to provide the essential information about microemulsion technique as a reliable approach toward the synthesis of zeolitic nano crystallites. the strategy discussed here provides a unique, effective, and potentially general methodology to the preparation of uniform and high purity nano crystallites of template-free zeolitic materials including lta, faujasite ty...

Journal: :Green and Sustainable Chemistry 2021

Microwave-assisted reactions are an environmentally friendly approach for synthesizing organic compounds. In this study, oximation of acetylferrocene and acetophenone was conducted under both microwave irradiation conventional heating conditions. Acetylferrocene were subjected to the two conditions in various solvent mixtures, extent conversion determined by 1H nuclear magnetic resonance spectr...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید