Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Why is there a myth that Mantu cannot be wet? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article Comments on the article

Did you know?

Why is there a myth that Mantu cannot be wet?

An intradermal tuberculin test, or Mantoux reaction, can be wetted. The myth about the inadmissibility of this comes from the 70s, when, for testing for tuberculosis infection, they did not put Mantoux, but a Pirque skin test, in which the skin was scratched with a special tool. However, if the ingress of water on Manta is not scary, it cannot be physically affected - for example, rub it with a washcloth or stick it with a band-aid.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

What kind of seeds did Darius and Alexander send to each other before the battle, and what did it mean?

In 333 BC, before the Battle of Issus, the Persian king Darius III sent his opponent Alexander the Great as a challenge to battle a bag of sesame seeds, which symbolized the number of soldiers in his army (sesame seeds are very small, a thousand seeds weigh only 2-5 grams ).

Alexander immediately answered this with a bag of mustard seeds, implying that although his army was smaller in number, they were hotter in battle.

 Test your knowledge! Did you know...

▪ Who is Socrates?

▪ What does Grand Prix mean?

▪ Why did the Danes establish the right to redeem the goods of any ship passing through the Danish Straits?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Major risk factor for gambling addiction 07.05.2024

Computer games are becoming an increasingly popular form of entertainment among teenagers, but the associated risk of gaming addiction remains a significant problem. American scientists conducted a study to determine the main factors contributing to this addiction and offer recommendations for its prevention. Over the course of six years, 385 teenagers were followed to find out what factors may predispose them to gambling addiction. The results showed that 90% of study participants were not at risk of addiction, while 10% became gambling addicts. It turned out that the key factor in the onset of gambling addiction is a low level of prosocial behavior. Teenagers with a low level of prosocial behavior do not show interest in the help and support of others, which can lead to a loss of contact with the real world and a deepening dependence on virtual reality offered by computer games. Based on these results, scientists ... >>

Traffic noise delays the growth of chicks 06.05.2024

The sounds that surround us in modern cities are becoming increasingly piercing. However, few people think about how this noise affects the animal world, especially such delicate creatures as chicks that have not yet hatched from their eggs. Recent research is shedding light on this issue, indicating serious consequences for their development and survival. Scientists have found that exposure of zebra diamondback chicks to traffic noise can cause serious disruption to their development. Experiments have shown that noise pollution can significantly delay their hatching, and those chicks that do emerge face a number of health-promoting problems. The researchers also found that the negative effects of noise pollution extend into the adult birds. Reduced chances of reproduction and decreased fertility indicate the long-term effects that traffic noise has on wildlife. The study results highlight the need ... >>

Random news from the Archive

laser catapult 27.10.2015

If the nanoparticle is under the action of a laser pulse, the ions and electrons contained in it will begin to oscillate strongly and an induced electromagnetic field will appear around the particle - the so-called near field. It was studied by a group of German physicists from Rostock, Berlin and Munich.

They irradiated a silicon dioxide nanoparticle with a laser with a light pulse duration of four femtoseconds. The nanoparticle diameter varied from 50 to 500 nm. As it turned out, the larger it is, the stronger the field around it, and this leads to interesting consequences. Thus, an electron located on the surface can accelerate, fly away quite far from the particle, return to it again, hit, and fly away like a ping-pong ball.

"The energy of the electrons and the direction of their movement is strictly related to the geometry of the near field, and it can be controlled by a laser," says Professor Thomas Fennel from the University of Rostock, who built a mathematical model of the phenomenon. In this way, it is possible to obtain a narrow directed beam of fast electrons, and, in the future, ions as well. In the second case, you need to create a composite: add ions of some other element to the silicon dioxide lattice. By slowing down the electron beam, it is possible to create an X-ray beam for accurate fluoroscopy, and the ion flow is useful for irradiating cancerous tumors.

In addition, knocked-out particles can be used to treat the surface of materials, creating the smallest reliefs on them far beyond the limit set by the laws of diffraction. Among the fantastic proposals is the use of laser-beaten electron beams to create computing systems. Their speed will be determined by the duration of the laser pulse, that is, femtoseconds - a hundred thousand times faster than the current ones.

Other interesting news:

▪ External SSDs up to 2TB Samsung T5

▪ Smartphone Xiaomi Redmi 10C

▪ NXP Powerful New MOSFETs

▪ Artificial muscle fiber steak

▪ Video camera for animals with built-in feeder

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Color and music installations. Selection of articles

▪ article by Maria Sklodowska-Curie. Famous aphorisms

▪ Article What is the difference between income and profit? Detailed answer

▪ article Burns. Health care

▪ article Dust trap. Encyclopedia of radio electronics and electrical engineering

▪ article Tie 10 knots on a rope with one stroke. Focus Secret

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024