نتایج جستجو برای: microwave heated polyol method

تعداد نتایج: 1688863  

Journal: :The Journal of organic chemistry 2008
M Antonia Herrero Jennifer M Kremsner C Oliver Kappe

The concept of nonthermal microwave effects has received considerable attention in recent years and is the subject of intense debate in the scientific community. Nonthermal microwave effects have been postulated to result from a direct stabilizing interaction of the electric field with specific (polar) molecules in the reaction medium that is not related to a macroscopic temperature effect. In ...

2013
V Surducan E Surducan D Dadarlat

Microwave radiation is widely used for heating tissues in hyperthermia or diathermy medical treatments. Usually, in such treatments, the tissue’s temperature is used as feedback for the microwave generator power control and consequently, for the control of the whole heating process. The temperature can be measured by contact, or non-contact (IR or MW radiometry), techniques. Unfortunately, in b...

Journal: :Nanoscale 2015
Siming Yu Jordan A Hachtel Matthew F Chisholm Sokrates T Pantelides Anna Laromaine Anna Roig

Simple approaches to synthesize hybrid nanoparticles with magnetic and plasmonic functionalities, with high control of their shape and avoiding cytotoxic reactants, to target biomedical applications remain a huge challenge. Here, we report a facile, fast and bio-friendly microwave-assisted polyol route for the synthesis of a complex multi-material consisting of monodisperse gold nanotriangles a...

2011
Zhifeng Zheng Hui Pan Yuanbo Huang Xuliang Zhang Hao Feng

Comparing to the conventional bath heating, the effects of liquefaction parameters on the degree of liquefaction of wood in polyhydric alcohols by using microwave as an energy source were evaluated. Polyurethane foams were successfully prepared from the liquefied biomass-based polyols. The effects of heating methods (conventional bath heating and microwave) and liquefaction reaction time on the...

Journal: :Acta scientiarum polonorum. Technologia alimentaria 2012
Mirosław Pysz Szymon Polaszczyk Teresa Leszczyńska Ewa Piątkowska

BACKGROUND In human nutrition legume seeds are usually subjected to soaking and thermal processes, mainly by using traditional cooking method. This method which has been used for decades, does not allow to control and adjust the parameters of this process. Therefore it does not seem to be the optimal method. Undoubtedly, microwave field is an alternative thermal process to conventional techniqu...

2013
A. Arenillas B. Fidalgo Y. Fernández L. Zubizarreta E. G. Calvo J. M. Bermúdez

Carbon materials are, in general, very good absorbents of microwaves, i.e., they are easily heated by microwave radiation. This characteristic allows them to be transformed by microwave heating, giving rise to new carbons with tailored properties, to be used as microwave receptors, in order to heat other materials indirectly, or to act as a catalyst and microwave receptor in different heterogen...

Journal: :Acta poloniae pharmaceutica 2016
Paweł Ramos Małgorzata Pieprzyca Barbara Pilawa

Complex free radical system in thermally sterilized acidum boricum (AB) was studied. Acidum boricum was sterilized at temperatures and times given by pharmaceutical norms: 160 degrees C and 120 min, 170 degrees C and 60 min and 180 degrees C and 30 min. The advanced spectroscopic tests were performed. The EPR spectra of free radicals were measured as the first derivatives with microwaves of 9.3...

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