TY - JOUR. T1 - Extraordinary Effect of Microwave Irradiation on Asymmetric Catalysis. AU - Kikuchi, Satoshi. AU - Tsubo, Tatsuyuki. AU - Ashizawa, Tomoko. AU - Yamada, Tohru. PY - 2010. Y1 - 2010. N2 - We here report the effect of microwave irradiation on the atropo-enantioselective ring-opening reaction of biaryl lactones with dynamic-kinetic resolution catalyzed by AgBF4-phosphine complexes. The multimode microwave reactor with a cooling system was employed and the fiber-optic sensor was used for measurement of the accurate internal reaction temperature. It was found that the reaction was accelerated by microwave irradiation without any loss of enantioselectivity at almost the same internal temperature as the conventional conditions.. AB - We here report the effect of microwave irradiation on the atropo-enantioselective ring-opening reaction of biaryl lactones with dynamic-kinetic resolution catalyzed by AgBF4-phosphine complexes. The multimode microwave reactor with a cooling system was ...
Objective To evaluate the clinical application of CT-guided percutaneous microwave coagulation therapy(PMCT) to patients with hepatocellular carcinoma(HCC) after transarterial chemoembolization(TACE).Methods Thirty-three patients with HCC undertook TACE first.They would undergo either TACE or PMCT based on the results of AFP and liver imaging such as CT/MR after 2 to 4 weeks of the primary TACE.Two-step method puncture was to perform puncture of guiding-needle of PMCT.Firstly,a lumbar-puncture needle(0.6 mm in diameter and 8 cm long) punctured the mass.Secondly,it was to reintroduce the guiding-needle(2.0 mm in diameter and 13.5 cm long) of PMCT,according to the angle and depth between the lumbar-puncture needle and the mass of recheck-CT.Then we introduced the antenna of PMCT and performed PMCT.All patients were followed up between 5 and 48 months(mean,25.5 months).Based on the results of follow-up,therapeutic effect,survival time and recurrence were prospectively evaluated with statistical analysis
Objective The efficacy of combination transcatheter arterial chemoembolization(TACE) with subsequent percutaneous microwave coagulation therapy (PMCT)was assessed.Methods Eighteen patients with 28 tumors under TACE followed within 1~2 days by ultrasound guided PMCT,which were diagnosed by liver biopsy.Results Ninteen tumors measuring 5 cm in greatest dimension showed complete necrosis,5 of 9 tumors measuring ≥5 cm in greatest dimension showed complete necrosis.Conclusions Combination therapy with TACE and PMCT for liver tumor is effective.
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Man-made microwave and radiofrequency (RF) radiation technologies have been steadily increasing with the growing demand of electronic appliances such as microwave oven and cell phones. These appliances affect biological systems by increasing free radicals, thus leading to oxidative damage. The aim of this study was to explore the effect of 2.45 GHz microwave radiation on histology and the level of lipid peroxide (LPO) in Wistar rats. Sixty-day-old male Wistar rats with 180 ± 10 g body weight were used for this study. Animals were divided into two groups: sham exposed (control) and microwave exposed. These animals were exposed for 2 h a day for 35 d to 2.45 GHz microwave radiation (power density, 0.2 mW/cm2). The whole-body specific absorption rate (SAR) was estimated to be 0.14 W/kg. After completion of the exposure period, rats were sacrificed, and brain, liver, kidney, testis and spleen were stored/preserved for determination of LPO and histological parameters. Significantly high level of LPO ...
At the same time,because in the microwave heating Microwave Heating Equipment process,microwave thermal Sealing ring of microwave drying sterilization equipment and non-thermal effect together,plays a bactericidal role for fast food,meets with the food health indicators requirements.Micrwave heating fast food equipment Microwave Heating Equipment is the best choice for heating fast food.Equipment Sealing ring of microwave drying sterilization equipment can be pointed reasonably designed accorrding to your products productivity.The microwave Sealing ring of microwave drying sterilization equipment has a different effect on different material.Due to the water molecules absorb microwave better,so the parts with more moisture content can absorb more microwave than lower moisture content parts,this is selective heating.Microwave Heating Equipment have following features : 1) fast heating ,3~5 minutes.microwave heat from internal to external ; 2) save energy/efficient; 3) Sealing ring of microwave ...
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A device and method is disclosed for creating a lesion in nerve-containing tissue spaced from a body lumen while protecting tissue forming and adjacent to a wall of the body lumen from injury. A catheter carrying a microwave antenna is positioned within the body lumen. Cooling fluid is circulated around the microwave antenna in thermal contact with the wall of the body lumen. Power is supplied to the microwave antenna to cause microwave energy to be emitted omnidirectionally from the microwave antenna. The power supplied to the microwave antenna and the cooling fluid circulated around the microwave antenna are controlled to cause the nerve-containing tissue spaced from the body lumen to be heated to a temperature sufficient to cause thermal damage while the tissue forming and adjacent to the wall of the body lumen is maintained at a temperature where thermal damage does not occur.
The effect of microwave radiation on the luminescence properties of CdS and CdTe:Cl single crystals is studied. It is established that the exposure of these semiconductors to short-term (≤30 s) microwave radiation substantially modifies their impurity and defect structure. The mechanisms of transformation of the defect subsystem of II-VI single crystals upon microwave treatment are discussed. It is shown that the experimentally observed changes are defined by the nonthermal effects of microwave radiation at a power density of 7.5 W cm{sup -2}; at 90 W cm{sup -2}, nonthermal effects are prevailing. ...
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There is disclosed a telemetric temperature probe for telemetry of temperatures of comestibles which are heated within microwave ovens. The probe includes a temperature responsive circuit for generating a signal responsive to the temperature of the comestible and an electromagnetic wave broadcasting circuit for telemetric transmission of the signal to a remote receiver which can conveniently be incorporated in the microwave oven and coupled to its control circuit. The probe is provided with facilities to derive power necessary for its operation from the microwave energy generated by the oven and includes, for this purpose, an antenna to receive microwave energy, a rectifier circuit for developing direct current power therefrom and a voltage regulation circuit to produce a source of direct current of controlled voltage for operation of the temperature responsive circuit and the broadcasting circuit.
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Microwave burns are burn injuries caused by thermal effects of microwave radiation absorbed in a living organism. In comparison with radiation burns caused by ionizing radiation, where the dominant mechanism of tissue damage is internal cell damage caused by free radicals, the primary damage mechanism of microwave radiation is thermal, by dielectric heating. Microwave damage can manifest with a delay; pain and/or signs of skin damage can show some time after microwave exposure. The depth of penetration depends on the frequency of the microwaves and the tissue type. The Active Denial System ("pain ray") is a less-lethal directed energy weapon that employs a microwave beam at 95 GHz; a two-second burst of the 95 GHz focused beam heats the skin to a temperature of 130 °F (54 °C) at a depth of 1/64th of an inch (0.4 mm) and is claimed to cause skin pain without lasting damage. Conversely, lower frequencies penetrate deeper; at 5.8 GHz the depth most of the energy is dissipated in the first ...
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It doesnt work because the keypad is fried, and the repair cost alone could buy him a cheap microwave from a discount store for every room in his house. The regions of New Zealand near the epicenter have been constantly assaulted with aerosols spraying and microwave transmissions. The history microwave used license plates for sale theoretical aspects of the technology are discussed and details of many routine procedures developed by both the author and by others are presented. The Panasonic Genius Microwave is ranked as the best microwave of 2015 for a few reasons.
Industrial microwave oats drying sterilization machine is a combination of a standard Industrial Low Temperature Microwave Systems and a convection oven which can heat the outside of food to higher temperatures than a conventional microwave. china microwave dryer equipment Food cooked in the convection microwave can be cooked quickly, as in an ordinary microwave oven,Microwave heating, drying, bonding, curing, cooking, pasteurizing and sterilizing equipment for continuous industrial processing of wide webs, conveyed materials and materials pumped through a pipe.
youtube]http://www.youtube.com/watch?v=cYGBNqIUIL0[/youtube] http://www.emfnews.org/qlinks.html. Protection Against Cell Phone Radiation. Microwave Radiation. Electrosensitivity. Principle of microwave heating is similar to that of a microwave oven where the water in the food content is heated first. Likewise microwave absorption effect is much more significant by the body parts which contain more fluid (water, blood, etc.) like the brain which consists of about 90% water. Effect is more pronounced where the movement of the fluid is less, for example, eyes, brain, joints, heart, abdomen, etc. The effect has shown to be much more severe for children and pregnant women. Of late there are lots of reports coming out on how radiation through mobile towers causes cancer, though cell phone companies maintain that there is nothing conclusive on this subject.. The effectiveness or seriousness of the issue has not been realized among the common man yet as one can not see or smell or hear microwave and its ...
1. Salford LG, Brun AE, Eberhardt JL, Malmgren L, Persson BRR. Nerve Cell Damage in Mammalian Brain after Exposure to Microwaves from GSM Mobile Phones. Environ Health Perspect. 2003;111:881-3 2. de Pomerai D, Smith B, Dawe A, North K, Smith T, Archer D. et al. Microwave radiation can alter protein conformation without bulk heating. Febs Lett. 2003;543:93-7 3. Del Vecchio G, Giuliani A, Fernandez M, Mesirca P, Bersani F, Pinto R. et al. Continuous exposure to 900 MHz GSM-modulated EMF alters morphological maturation of neural cells. Neurosci Lett. 2009;455:173-7 4. Hinrikus H, Bachmann M, Lass J, Tomson R, Tuulik V. Effect of 7, 14 and 21 Hz modulated 450 MHz microwave radiation on human electroencephalographic rhythms. Int J Radiat Biol. 2008;84:69-79 5. Joubert V, Leveque P, Cueille M, Bourthoumieu S, Yardin C. No apoptosis is induced in rat cortical neurons exposed to GSM phone fields. Bioelectromagnetics. 2007;28:115-21 6. Malyapa RS, Ahern EW, Straube WL, Moros EG, Pickard WF, Roti Roti JL. ...
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A few decades from now, will it be common knowledge that using microwave radiation to heat food is harmful to human health? Its certainly a possibility, and information is already emerging which shows cause for concern. Microwaves work by causing water molecules to resonate at very high frequencies, converting them into steam and thereby heating your food. While this might be a convenient way to prepare your food, using microwave radiation in this way actually changes the chemical structure of that food.. The fact that they are approved as safe doesnt mean much these days, as weve seen with several other examples from Tobacco, PCBs and Asbestos and Glyphosate. Just because a government agency, like the Food and Drug Administration (FDA), or a government health agency approves something as safe, doesnt necessarily mean its safe.. You might be wondering how this is any different from heating your food on the stove or steaming it, and thats a fair question. The difference is that microwaves ...
Bring mixture to boil on the stove or place in microwave to heat it up for a few seconds. Duo plate: this is a unique design feature which allows you to get two meals ready at the same time with the help of microwave racks or shelves. An apple crisp cooked in the microwave oven and cooled to room temperature could be used in place of the apple pie for the same 10 to 15 seconds per serving. To examine the turntable motor, the comparing over range microwaves oven must be turned over and the bottom grilled should be removed.
Below is some information from this article. My comments appear in square brackets. To convert from mW/cm2 to microW/cm2 multiple by 1000.. United States. 1. From 1940s to 1970s the use of microwave emitting equipment had increased considerably.. 2. In the United States radio frequencies (RF) from 10 to 10,000 MHz were classified as microwave radiation, while in Europe the range was from 300 to 300,000 MHz. [NOTE: We now use the European range to delineate the microwave part of the radio frequency spectrum.]. 3. By 1970, scientists recognized that parts of the body that are unable to dissipate heat are the most vulnerable to microwave radiation. This includes the lens of the eye (cataracts) and the reproductive organs (sterility or degenerative changes).. 4. Depth of penetration of radiation into tissue is a function of frequency with greater penetration at lower frequencies.. 5. In the United States the first guidelines were established during the Tri-Service conference, held in 1957. Below is ...
I also read a long and detailed study of what microwaved food does to your blood. Dr. Hans Ulrich Hertel, now retired, worked as a food scientist with one of the major Swiss food companies. He carried out a clinical study, with Dr. Bernard H. Blanc of the Swiss Federal Institute of Technology and the University Institute for Biochemistry, on the effects microwaved nutrients had on the blood and physiology of the human body. It was enough to chill my blood! They tested the volunteers blood before eating (empty stomach), after consuming raw milk, milk cooked conventionally, pasteurized milk, and raw milk cooked in a microwave, raw vegetables from an organic farm, same veggies cooked conventionally, same veggies frozen and defrosted in a microwave oven and the same veggies cooked in the microwave oven. Blood samples were taken before eating and at defined intervals after eating.. Significant changes were found in the blood samples from the intervals following the microwaved foods. Including: a ...
Method and apparatus are provided for propagating microwave energy into heart tissues to produce a desired temperature profile therein at tissue depths sufficient for thermally ablating arrhythmogenic cardiac tissue to treat ventricular tachycardia and other arrhythmias while preventing excessive heating of surrounding tissues, organs, and blood. A wide bandwidth double-disk antenna (700) is effective for this purpose over a bandwidth of about six gigahertz. A computer simulation provides initial screening capabilities for an antenna such as antenna, frequency, power level, and power application duration. The simulation also allows optimization of techniques for specific patients or conditions. In operation, microwave energy between about 1 Gigahertz and 12 Gigahertz is applied to monopole microwave radiator (600) having a surface wave limiter (606). A test setup provides physical testing of microwave radiators (854) to determine the temperature profile created in actual heart tissue or ersatz heart
The effect of microwave radiation on 0.5Fe/ZSM-5 catalysts (0.5 wt% Fe) active in the conversion of methanol to hydrocarbons was studied. Radiation wa
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Abstract: Microwave-assisted extraction was investigated for extraction of polysaccharides from Catathelasma ventricosum using Response Surface Methodology (RSM). The effects of operating conditions (extraction time, microwave power and ratio of water to raw material) on the extraction yield of polysaccharides were studied. A Box-Behnken Design was used for experimental design and analysis of the results to obtain the optimal processing parameters. Among the three extraction parameters, the microwave power was the most significant factor to affect the yield of polysaccharides from Catathelasma ventricosum. In addition, microwave power and extraction time had significant interaction effects. A mathematical model with high determination coefficient was gained and could be employed to optimize polysaccharides extraction and the optimal conditions were extraction time 5 min, microwave power 420 W, ratio of water to raw material 25:1. Under these conditions, the experimental yield of polysaccharide ...
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... offers a complete range of 915 MHz Microwave thawing machine for the food industry and tunnels for tempering and thawing from -20°C to -4/-2°C. Capacity for Paper shrimp microwave sterilization equipment varies from 150 to 1500 kg per hour. Capacity for microwave tunnels varies between 2.5 and 12 T per hour. Treatment time is only a few minutes. Then the blocks can be ...Industrial Microwave Systems Co Ltd.
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High quality microwave talcum powder drying and sterilization equipment is a combination of a standard industrial microwave convection oven and a convection oven which can heat the outside of food to higher temperatures than a conventional microwave. Low Temperature Microwave Drying Food cooked in the convection microwave can be cooked quickly, as in an ordinary microwave oven,
Secondly, while microwaves are extremely good at heating liquid water, ice is almost totally transparent to them, so it is actually quite difficult to get ice to melt in a domestic microwave oven. The defrost option on a microwave oven relies on intermittent heating of a small amount of liquid water present on the food, and heat conduction from these areas into frozen material. By putting frozen material into the microwave oven with continuous energy input, no time is given for thermal conductivity effects, and therefore a colossal heating effect occurs on a very localised surface area. These areas, typically at the extreme point of the carrot, will dry out rapidly and then char, essentially forming small carbon points ...
BMM201SS 20 Litre built-in microwave oven e 1 User Manual for your Baumatic BMM201SS 20 Litre microwave oven NOTE: This User Instruction Manual contains important information, including safety & installation points, which will enable you to get the most out of your appliance. Please keep it in a safe place so that it is easily available for future reference; for you or any person not familiar with the operation of the appliance. DD 06/07/09 2 Contents Environmental note 4 Important safety information 5-9 Specifications Product and aperture dimensions Product specifications Electrical details Description of the appliance Control panel The turntable The function selector dial 10 - 13 10 10 11 11 12 12 13 Using your microwave Setting the clock Before first use Cooking food Quick start During operation Defrosting by time (manual) Defrosting by weight (automatic) Auto cooking function 1 Auto cooking function 2 Safety lock Microwave cooking guidelines Materials you can use in a microwave oven ...
Colombo et al have reported beneficial results using a combination of intravesical mitomycin-C and local microwave-induced hyperthermia. They compared a group of these patients with patients receiving... more
Microwave sensing and monitoring is very attractive for biological applications because of their sensitivity to water and dielectric contrast. Direct detection of biological structures in microwave frequencies and understanding of the molecular mechanisms of microwave effects is considered as a problem of a great importance. Nowadays, however, microwave technique for localized testing biological objects is at a rudimentary level. In contrast, optical biosensing has benefited from in a large variety of specialized tools. The proposed chiral field microwave biosensors will open an entirely new field of microwave biomedical diagnostics and pathogen detection.. ...
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This then attempts to run the second transformer at a much higher volts-per-turn figure. Emeril had invited me to join him in the kitchen before he knew Id been invited to dine. As youre purchasing appliances for your new home, your oven is one thing youll be glad you put careful time and thought into. Hi Nic not sure if a door and chimney stop made from the same clay mixture as the oven will work - it is quite cook butter chicken microwave oven when it is dry and so I think they would end up cracking.
A therapeutic microwave system comprises a support unit having two or more separable segments; a microwave power assembly positioned between two separated segments of the support unit and including two or more microwave power supply devices; position adjustment componentry; and a central processing unit. The system may further include a temperature sensor for monitoring a treated subjects exhaled air temperature in real time and adjusting microwave irradiation accordingly, and a cooling device for controlling the patients brain temperature during treatment.
In transurethral microwave therapy (TUMT), an instrument (called an antenna) that sends out microwave energy is inserted through the urethra to a location inside the prostate. Microwave energy is then used to heat the inside of the prostate. Cooling fluid is circulated around the microwave antenna to prevent heat from damaging the wall of the urethra. To prevent the temperature from getting too high outside the prostate, a temperature sensor is inserted into the mans rectum during the procedure. If the temperature in the rectum increases too much, the treatment is turned off automatically until the temperature goes back down.. The temperature becomes high enough inside the prostate to kill some of the tissue. As this part of the prostate heals, it shrinks, reducing the blockage of urine flow.. This treatment is done in a single session. It usually does not require an overnight stay in the hospital. A general or spinal anesthetic is needed during the procedure.. Microwave therapy is also known ...
The global market size of In-built Microwave Oven is $XX million in 2018 with XX CAGR from 2014 to 2018, and it is expected to reach $XX million by the end of 2024 with a CAGR of XX% from 2019 to 2024. Global In-built Microwave Oven Market Report 20...
Researchers have developed two new methods for imaging microwave fields. Both methods exploit the change in spin states induced by an applied microwave field.