نتایج جستجو برای: microwave assisted

تعداد نتایج: 176049  

2011
K. Oh A. H. Sklavounos D. J. Marchiarullo N. S. Barker

Utilizing ~1 W of microwave power, we achieved heating of PCR buffer with unprecedented temperature ramp rates that allowed for rapid thermocycling. Polymeric microdevices, chosen for their low cost and ease of fabrication, were constructed from polycarbonate (PC), poly(methyl-methacrylate) (PMMA), and polyester-toner (PeT) using fast, simple microfabrication via computer-aided milling for PC a...

2013
Yashumati R. Bhardwaj Monika Chauhan Ashutosh Pareek Dharma Kishore

Present work describes the synthesis of coumarin Mannich bases 4-7 by the application of Mannich reaction on 7-hydroxy-4-methyl coumarin 3 using conventional as well as microwave technology to compare the feasibility, reaction time and yield of the product. For this, 7-hydroxy-4-methyl coumarin 3 was prepared using Pechmann condensation reaction and Mannich bases (4-7) were synthesized by the r...

Journal: :Journal of clinical pathology 1989
A Kennedy A K Foulis

The quality of microscopic image of cryostat sections that had been subjected to microwave assisted fixation was compared with that resulting from conventional air drying of the sections. The role of microwaves in producing rapid special stains on cryostat sections was also assessed. Methods used permitted stains such as periodic acid Schiff, alcian blue, Gordon and Sweets's reticulin, Masson F...

2010
John J. Richard

[I] Paterson, K. Y., Veillon, C., and H. M. Kingston, "Microwave Digestion of Biological Samples for Selenium Analysis by Electrothermal Atomic Absorption Spectrometry" in Introduction to Microwave Sample Preparation: Theory and Practice, H. M. Kingston and L. B. Jassie, eds., ACS Reference Book Series, in press. [2] Kingston, H. M., and Jassie, L. B., Anal. Chem. 58, 2534 (1986). (31 Pratt, K....

Journal: :Molecules 2010
Hong-Wu Wang Yan-Qing Liu Shou-Lian Wei Zi-Jun Yan Kuan Lu

Microwave-assisted hydrodistillation (MAHD) is an advanced hydrodistillation (HD) technique, in which a microwave oven is used in the extraction process. MAHD and HD methods have been compared and evaluated for their effectiveness in the isolation of essential oils from fresh mango (Mangifera indica L.) flowers. MAHD offers important advantages over HD in terms of energy savings and extraction ...

Journal: :international journal of nanoscience and nanotechnology 2010
m. movahedi , a. r. mahjoub i. yavari e. kowsari

in this paper, synthesis of the flower-like zinc oxide was performed using microwave assisted dicationic ionic liquid [mmp(im)2 ]br2 . the polycrystalline flower-like zinc oxide nanostructure was obtained when a suitable mole ratio (ionic liquid /zinc acetate) and short duration microwave was used. x-ray diffraction (xrd), scanning electron microscopy (sem), and photoluminescence (pl) spectra w...

2009
Mazaahir Kidwai Roona Poddar Poonam Mothsra

The N-acylation of ethanolamine (2) with various fatty acids 1a-d and esters of fatty acids 1e-h using Candida antarctica B lipase (Novozym((R)) 435) are described and optimum conditions for selective N-acylation rather than O-acylation are also discussed. Microwave assisted solution phase, solid supported and conventional methods were investigated and results were compared. There is a synergy ...

2006
Isao KOJIMA Tetsuo UCHIDA ChuZo IIDA

The utility of microwave oven for simple and rapid acid digestion of zoological and botanical materials was investigated by using a double Teflon vessel with a polypropylene jacket. The microwave-assisted digestion of samples with the HNO3-HCI-HCIO4-HF mixture in the bomb offers the advantage of taking much shorter process for sample preparation. The digestion was completed within 15 min even u...

2015
Mahesh Rao

Conventional tissue processing of histologic specimens has been carried out in the same manner for many years. It is a time-consuming process involving batch production, resulting in a 1-day delay of the diagnosis. Microwave-assisted tissue processing enables a continuous high flow of histologic specimens through the processor with a processing time of as low as 1 h. In this article we review t...

2014
Pei Tang Gang Hu Yongjun Gao Wenjing Li Siyu Yao Zongyuan Liu Ding Ma

Microwave-assisted heating method is used to treat graphite oxide (GO), pyrolytic graphene oxide (PGO) and hydrogen-reduced pyrolytic graphene oxide (HPGO). Pure or doped graphene are prepared in the time of minutes and a thermal deoxygenization reduction mechanism is proposed to understand their microwave adsorption behaviors. These carbon materials are excellent catalysts in the reduction of ...

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