نتایج جستجو برای: electromagnetic heating

تعداد نتایج: 129581  

2013
Vivek Srivastava

Hmim][Tfa] was tested as catalyst for the Biginelli reaction multicomponent reaction under conventional and non conventional heat source i.e. Microwave heating. Low catalyst loading, reduced reaction time and operational simplicity are the main highlights of this proposed protocol. Using our proposed protocol, we tested 30 different biologically active compounds in good yield.

Journal: :Molecules 2007
Zoubida Chemat-Djenni Boudjema Hamada Farid Chemat

The purpose of the study was to investigate microwave selective heating phenomena and their impact on heterogeneous chemical reactions. We also present a tool which will help microwave chemists to answer to such questions as "My reaction yields 90% after 7 days at reflux; is it possible to obtain the same yield after a few minutes under microwaves?" and to have an approximation of their reactio...

Journal: :Inorganic chemistry 2006
Constantinos J Milios Alina Vinslava A Gavin Whittaker Simon Parsons Wolfgang Wernsdorfer George Christou Spyros P Perlepes Euan K Brechin

The use of microwave heating has improved the reaction rate, enhanced the yield of an inorganic cluster complex, and allowed for the high-temperature/high-pressure synthesis of a Mn(III) single-molecule magnet.

Journal: :The Journal of microwave power and electromagnetic energy : a publication of the International Microwave Power Institute 2009
Avijit Mondal Anish Upadhyaya Dinesh Agrawal

Microwave processing is emerging as an innovative and highly effective material processing method offering many advantages over conventional methods, especially for sintering applications. It is recognized for its various advantages, such as: time and energy saving, rapid heating rates, considerably reduced processing cycle time and temperature, fine microstructures and improved mechanical prop...

1998
Luigi Foschini

It is shown that the plasma, generated during an impact of a meteoroid with an artificial satellite, can produce electromagnetic radiations below the microwave frequency range. These interferences can disturb the regular satellite operations. Pacs 96.50.Kr: Meteors and meteoroids. Pacs 52.50.Lp: Plasma production and heating by shock waves and compression. Pacs 95.40.+s: Artificial Earth Satell...

2011
Joanna Michalak Elżbieta Gujska Joanna Klepacka

The influence that food heating has on the concentration of acrylamide in home-cooked potato dishes prepared by high-temperature, such as pan-frying, deep-frying, roasting and microwave heating was analyzed. The experiment was performed with commercially available deep-frozen par-fried French fries and deep-frozen par-fried potato products other than French fries (cubes, wedges, noisettes, panc...

2013
Ravish Majithia Jeffrey Speich Kenith E. Meissner

In this report, a technique for rapid synthesis of ZnO microstructures by microwave-assisted heating of precursors at hydrothermal conditions is demonstrated. Further, the reaction mechanism for the growth of ZnO microstructures is analyzed. An accelerated rate of reaction obtained using microwaves enables a dissolution-recrystallization mechanism for generation of one dimensional (1D) rod-like...

1999
Yaron Alpert Eli Jerby

Microwave heating processes involve electromagnetic and thermal effects coupled together through the local temperature dependence of the material dielectric properties. This paper presents a one-dimensional model for the coupled electromagnetic-thermal process and demonstrates its solutions for typical problems. The local temperature dependence of the lossy dielectric medium is taken into accou...

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