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Micro should not be used to heat tea, according to a recent study. Report research results Fox News. The rule also applies to many other liquids.
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There is now a researched right and wrong way to heat tea. When you heat water in a boiler on a stove, so-called convection takes place. This means that the water at the bottom of the boiler heats up and becomes less compact in appearance, tending upwards. Thus, the cooler water flows down towards the warmer water, and at the same time warms up. This process results in satisfactorily evenly heated water from which a cup of hot tea can be made.
In the micro, however, the water does not heat up in the same way. Researchers at China University of Electronic Science and Technology found that the liquid near the top of the cup placed in the micro heats up much more than the liquid at the bottom. This is because the entire container heats up in the microwave, not just its bottom. After all, the tea is too hot to drink on the top and even uncomfortably cool on the bottom. In AIP Advances.
According to researchers, there is a way to get a worthy tea heated even in the microwave, but it is difficult to make. The method requires special properties from the container, such as a silver rim – and at home it is definitely not worth trying to heat the metal in the microwave.
Also applies to other liquids: Do not reheat coffee in the microwave
In addition to tea, the research results of the Chinese University apply to many other liquid foods. You’ve probably noticed the same phenomenon when you heat different soups in the microwave, for example. Many also reheat coffee in the microwave, but that’s not worth it either. coffee Expert told about the subject earlier in the spring:
– All coffees have some bitterness, but freshly brewed coffee is also rich in sweetness and acidity, which balance the bitterness and create a complex and delicious drink. When you heat your coffee, the production of quinine and caffeic acid increases and the coffee becomes even more bitter, says Emily Rosenberg, coffee trainer at Stumptown Coffee.
The coffee roasts as if it continues to be reheated and at the same time you extract flavors that you might not want in your coffee.
Rosenberg has a pertinent parable in this regard:
– You cook the finished product. Don’t put a single cake back in the oven because it just dries and the texture and taste change. Coffee can also be considered a finished product.
Micro-heating of solids also has its own challenges. For solid raw materials, it is difficult to obtain uniform heat in the microwave in any vessel, as there is no heat transfer to the materials like liquids.
Source: Fox News