Some magnetrons have ceramic insulators with beryllium oxide (beryllia) added. The beryllium in such oxides is a serious chemical hazard if crushed then inhaled or ingested. In addition, beryllia is listed as a confirmed human carcinogen by the IARC;[citation needed] therefore, broken ceramic insulators or magnetrons should not be handled. This is a danger if the microwave oven becomes physically damaged, if the insulator cracks, or when the magnetron is opened and handled, yet not during normal usage.
The Toshiba EM131A5C-BS handles all your basic tasks and balances counter space with a roomy capacity. Available in either black or silver stainless steel, this countertop microwave has an interior capacity of 1.2 cubic feet while measuring just over 20 inches wide and 17 inches long. Its 1,100 watts of power can be adjusted with 10 power settings, and customers agree that it cooks food evenly and quickly. The unit also is equipped with sensor cooking and two defrost settings, though some people found that not all of the pre-set cook modes worked as expected and the microwave defrosted too aggressively for some meats. Still, this Toshiba countertop microwave has a solid reputation for being easy to use and reliable.

Microwave heating can be deliberately uneven by design. Some microwavable packages (notably pies) may include materials that contain ceramic or aluminium flakes, which are designed to absorb microwaves and heat up, which aids in baking or crust preparation by depositing more energy shallowly in these areas. Such ceramic patches affixed to cardboard are positioned next to the food, and are typically smokey blue or gray in colour, usually making them easily identifiable; the cardboard sleeves included with Hot Pockets, which have a silver surface on the inside, are a good example of such packaging. Microwavable cardboard packaging may also contain overhead ceramic patches which function in the same way. The technical term for such a microwave-absorbing patch is a susceptor.[43]
Microwave ovens heat food without getting hot themselves. Taking a pot off a stove, unless it is an induction cooktop, leaves a potentially dangerous heating element or trivet that will stay hot for some time. Likewise, when taking a casserole out of a conventional oven, one's arms are exposed to the very hot walls of the oven. A microwave oven does not pose this problem.

Many reviewers of this Panasonic microwave oven rave about its power, efficiency, and spacious interior. “We have been totally delighted with this microwave,” writes one. “We have had to scale back cooking times because of the incredible cooking power. The spacious interior and ease of use are just the best.” Another says, “Constant microwave power emission cooks to total satisfaction with no cold spots. Baked potatoes are the best I’ve ever had in my life, and I’m old, smooth, creamy, uniform texture throughout. No overdone skins. Sensor cooking works too. At this price, it’s a steal.” Part of what sets this microwave apart is the stylish stainless-steel front, with several reviewers noting that it “blends in well with a kitchen with stainless-steel appliances and black, as well.”
For an over the range microwave, you need the right kind of airflow for your setup, and you may need additional features like the ability to control oven range lights. Over the range units are specifically designed for these tasks, but they vary from model to model, so don’t get complacent when buying. Know what you need to keep your stove clear of smoke first!
There are, however, a few cases where people have been exposed to direct microwave radiation, either from appliance malfunction or deliberate action.[67][68] The general effect of this exposure will be physical burns to the body, as human tissue, particularly the outer fat and muscle layers, has similar composition to some foods that are typically cooked in microwave ovens and so experiences similar dielectric heating effects when exposed to microwave electromagnetic radiation.
For convenience in the kitchen, nothing beats the microwave, which allows you to cook and reheat food from the inside out. After more than 100 hours of research and testing, we think that the Toshiba EM925A5A-BS is the best microwave for most kitchen counters. It’s easy to operate, has a number of express cooking options that heat food quickly and evenly, and even has a mute button so you can cook in silence.

For convenience in the kitchen, nothing beats the microwave, which allows you to cook and reheat food from the inside out. After more than 100 hours of research and testing, we think that the Toshiba EM925A5A-BS is the best microwave for most kitchen counters. It’s easy to operate, has a number of express cooking options that heat food quickly and evenly, and even has a mute button so you can cook in silence.


When you add in the competent wattage and the internal space, which is large enough for the bigger plates in your home, it’s tough to see what this Panasonic model doesn’t do right. This 2.2 cu ft microwave is a winner. Even the design is pleasantly modern and easy to clean in case of grease or stains. This microwave really does impress on every level…but it’s not an over the range model, which may limit your options.
This invention relates to heating systems for dielectric materials and the object of the invention is to heat such materials uniformly and substantially simultaneously throughout their mass. ... It has been proposed therefore to heat such materials simultaneously throughout their mass by means of the dielectric loss produced in them when they are subjected to a high voltage, high frequency field.
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