نتایج جستجو برای: microwave

تعداد نتایج: 50836  

Journal: :Physical chemistry chemical physics : PCCP 2015
Bridgett Ashley Derek D Lovingood Yu-Che Chiu Hanwei Gao Jeffery Owens Geoffrey F Strouse

Microwave chemistry has revolutionized synthetic methodology for the preparation of organics, pharmaceuticals, materials, and peptides. The enhanced reaction rates commonly observed in a microwave have led to wide speculation about the function of molecular microwave absorption and whether the absorption leads to microwave specific effects and enhanced molecular heating. The comparison of theor...

خطیب جو, علی , طهماسبی, حامد , فتاح‌نیا, فرشید , محمدی‌زاد, طاهر , موسوی, سیدغلامرضا , پورملکشاهی, امین الله ,

     Effect of drying method was investigated on chemical composition, nutrient digestibility and rumen fermentation parameters of alfalfa hay harvested in the morning or afternoon. Experimental treatments consisted of alfalfa harvested in the morning and dried in sun, alfalfa harvested in the afternoon and dried in sun, alfalfa harvested in the morning and dried in shadow, alfalfa harvested in...

Journal: Journal of Herbal Drugs 2015

Background & Aim: Essential oils are isolated from different sections of plants such as flowers, seeds, leaves, stems and roots. Essential oils are applied extensively in producing of perfumes, cosmetics, foods, beverages and confectioneries and as ingredients of disinfectants and insecticides. Experimental: Essential oil are obtained by several isolation methods, such as hydrodistillation (HD...

Ahmad Joneidi Jafari, Bahram Kamarehie, Hassan Asilian Mahabadi,

Background: In this research, the decomposition of Aroclor 1254, including 20 kinds of poly chlorinated biphenyls (PCBs), in real waste transformer oil in the presence of PEG1000, NaOH, zero valent iron and H2O by microwave (MW) irradiation was studied. Methods: Central composites design (CCD) method was carried out for experimental design. The effects of microwave power levels (200- 1000 W), ...

Journal: :The Malaysian journal of pathology 1990
K H Ng S K Gan

We investigated microwave-stimulated fixation of tissues for transmission electron microscopy using a domestic microwave oven operating at a frequency of 2.45 GHz with an output power of 500W. Microwave-stimulated fixation, in 4% glutaraldehyde, of fresh rat kidney, liver, heart and brain tissues was compared to conventional fixation. Human renal biopsies were similarly studied. Electron micros...

2015
Yan-Hui Hao Li Zhao Rui-Yun Peng

With the rapid development of electronic technologies, anxiety regarding the potential health hazards induced by microwave radiation (MW) has been growing in recent years. The brain is one of the most sensitive target organs for microwave radiation, where mitochondrial injury occurs earlier and more severely than in other organs. Energy metabolism disorders do play an important role during the ...

2014
Phatcharee Phoempoon Lek Sikong

The microwave assisted synthesis nowadays attracts a great deal of attention. Monoclinic phase VO2 (M) was prepared from NH4VO3 and H2C2O4 · 2H2O by a rapid microwave assisted technique. The synthesis parameters, microwave irradiation time, microwave power, and calcinations temperature were systematically varied and their influences on the structure and morphology were evaluated. The microwave ...

2016
Krishnamoorthy Pitchai Sohan Birla Jeyamkondan Subbiah David D. Jones Sohan L Birla David D Jones

Due to inherent nature of standing wave patterns of microwaves inside a cavity and dielectric properties of different components in a food, microwave heating leaves non-uniform distribution of energy inside the food volumetrically. Achieving heating uniformity plays critical role in improving the safety of microwave heated products. In this paper, we present a method for assessing heating unifo...

Background and Objectives: Red colored fruits such as cornelian cherry (Cornus mas L) are recognized as being healthy. The color of these fruits is an important sensory property in assessment of product quality therefore, minimizing the loss of color in the process is very important. Materials and Methods: In this study, comparison of the color, turbidity, degradation rate of anthocyanin, an...

ژورنال: سلامت کار ایران 2015

Background and aims:  X-band microwave with 8-12.5 frequency range has various applications such as air control traffic, navy communication and etc. Uncontrolled exposure with microwave can lead to adverse effect on workers. Application of the shielding is superior control for prevention of microwave exposure.The aim of this study is production a new electromagnetic shielding for exposure contr...

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