What should not be done within twenty minutes after eating? Detailed answer

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What should not be done within twenty minutes after eating? Detailed answer

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What should not be done within twenty minutes after eating?

"Swim, of course." your parents would answer, although there is absolutely no evidence that swimming after a normal meal is associated with any risk.

The swimming pool is generally not too dangerous; according to government statistics, you're much more at risk of injury when taking off your tights, chopping vegetables, walking your dog, or trimming a hedge.

And one more friendly tip: stay away from cotton swabs, cardboard boxes, vegetables, aromatherapy and washcloths. Every day these things become more and more dangerous.

So what is behind the established myth about the dangers of bathing after eating? (Such ads, by the way, can still be found on the walls of swimming pools.) According to doctors, after eating, blood drains from the muscles and is redirected to the stomach in order to help it digest food. At the same time, blood flow to the limbs is weakened, which may well lead to paralyzing spasms. (In less sophisticated versions, the weight of food in the gut simply pulls us down.)

Although, in our opinion, a much greater risk in such situations is dehydration due to the fact that you did not drink, or a breakdown due to bathing on an empty stomach.

The Royal Society for the Prevention of Accidents takes a "common sense" position, arguing that when swimming after eating, there is - at least in theory - the risk of regurgitating food, which is much more dangerous in water than on land. Their report gives some reasons for the accidents that occurred in the United Kingdom in 2002:

Sneakers
Tights
Carton boxes
indoor swimming pool
Cotton swabs
Pants
branches/rods
Aromatherapy
Washcloths and sponges

Author: John Lloyd, John Mitchinson

Random interesting fact from the Great Encyclopedia:

What is a petrel?

First of all, it must be said that the petrel is a bird, but rather unusual. Its English name ("petrel") comes from Saint Peter, who was known to be able to walk on water, and these birds seem to be able to do the same! All we know about them is that they have webbed feet (the smallest of the webbed birds) and that they somehow manage to float above the water, as if they are "walking" on its surface.

Petrel - an ocean bird, it spends almost all its life above the ocean, and on land it appears only during the period of laying eggs. Travelers on the sea can see how he describes circles around the ship or flies right over the crests of the waves. If a storm comes up, petrels can't "walk" on water and therefore have to stay in the air day and night! The petrel is about the size of a swallow.

Petrels that appear on the east and south coasts of the United States during the summer are called "Wilson's petrels". They have a completely black plumage with a white mark near the tail. In length, they reach about 18 centimeters, have a short beak and long, stilt-like paws. They greet travelers with friendly chatter, but they cannot sing.

Another petrel can only be found in the northern seas, such as the Arctic Ocean and the Bering Sea. It's called the Lich's Stormer. It is brownish black in color and nests in holes or burrows in the ground or in rock crevices. During breeding seasons, this bird tries to hide from everyone. Hundreds of birds can gather in one place, and no one will see them!

There are other types of petrels, about 80 in total, which can be found in all the oceans of the world, especially in the southern seas. The largest of them is the gigantic petrel, 88 centimeters in size. Another, which is called the "diving petrel", has a length of 18-25 centimeters.

All petrels belong to the order Probenosed because their nostrils are tubular.

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Innovative silicon supercapacitor 19.11.2013

The innovative supercapacitor design, created by material scientists at Vanderbilt University (USA) under the guidance of Assistant Professor Cary Pint, makes it possible to create photovoltaic cells capable of generating electricity around the clock and not only when the sun is shining.

It is claimed to be the first supercapacitor made entirely from silicon and along with the microelectronic circuit it powers. And it can be used in built-in mobile phone batteries that charge in seconds and last for weeks between charges.

Scientists believe it will be possible to build batteries from the excess silicon found in today's photovoltaic cells, sensors, mobile phones and many other electromechanical devices, reducing the cost of these devices.

"If you ask people to make a supercapacitor out of silicon, they'll tell you it's a crazy idea," said Carey Pint, an assistant professor in the department of mechanical engineering who led the study. "But we've discovered a simple way to do it."

Instead of storing energy in chemical reactions, as batteries do, supercapacitors store energy by collecting ions on the surface of a porous material. As a result, they have the ability to charge and discharge in minutes rather than hours, and last for several million cycles rather than the thousands of cycles that batteries can.

These properties have enabled supercapacitors made from activated carbon to capture several niche markets, such as storing the energy generated by regenerative braking systems in buses and electric vehicles and providing the surge current needed to regulate the blades of giant wind turbines as wind conditions change. Supercapacitors still lag behind lithium-ion batteries in terms of specific capacity, so they are still too bulky to power most consumer devices. However, they are developing rapidly.

"Building high-performance functional devices from nanoscale building blocks with any level of control proved to be quite a challenge. And once it was done, it proved difficult to repeat," explained Assistant Professor Cary Pint.

“Despite the excellent performance of the device that we got, our goal was not to create devices with record parameters,” Pint said. “The goal was to develop methods for creating integrated energy storage. Silicon is an ideal material to work with, because it is the basis for many modern technologies and devices. In addition, most of the silicon in existing devices remains unused due to the fact that it is very expensive and unprofitable to produce thin silicon substrates."

Pint's group is now using this approach to create an energy store that could be formed in excess material or on the back of photocells and sensors. Supercapacitors could store excess electricity generated by photovoltaic cells during the day and release it during peak hours in the evening.

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