Since when did Sunday become an official holiday? Detailed answer

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Since when did Sunday become an official holiday? Detailed answer

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Since when did Sunday become an official holiday?

In 321, the Roman emperor Constantine I the Great officially declared Sunday a "day of rest".

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What is a medicine?

Many people think that a drug is a substance taken to relieve pain or as a sleep aid. The composition of this or that medicine includes, as a rule, many different substances. The preparation of medicines and healing with their help has been known since ancient times. The ancient priests, who had the right to heal, prepared their potions from plants. The ancient Greeks also used plants for the preparation of medicines already a thousand years ago. To this day, most medicines are made from plants.

Morphine and opium are prepared from poppy juice. Cocaine is used as an anesthetic during operations and is prepared from the coca plant. Quinine is obtained from the bark of the cinchona tree. Castor oil is obtained from castor seeds. A large number of the medicines we use are obtained from minerals - for example, salts, bromides, phosphorus. Did you know that animal organs can also produce useful medicinal substances for humans? These include the thyroid gland, adrenal glands, pancreas.

Another group of drugs are vaccines, toxins and antitoxins. The vaccine contains dead or weakened pathogens. When placed in the body, they create antibodies that enter the bloodstream and protect against the disease itself. Toxins work in the same way, but they contain inactive poisons produced by disease-causing microbes. Antitoxins contain a large amount of antibodies, which, when introduced into the body, increases its resistance to infection. With the development of science, man was able to obtain artificial medicines. They are not created by plants or animals, but in laboratories through chemical research.

Now the number of artificial drugs is becoming more and more, and their production is becoming cheaper. Probably, everyone is well aware of such an artificial medicine as aspirin. More recently, science has discovered another medicine - antibiotics. These chemicals are derived from molds.

Antibiotics have the ability to stop the growth of many pathogenic bacteria. The two best known antibiotics are penicillin and streptomycin.

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Insulin patch for diabetics 09.07.2015

People with diabetes will be able to forget about painful injections.

Nicotine patch? There is. Contraceptive patch? There is. What about insulin? It may soon become a reality. Scientists at North Carolina State University have created a coin-sized patch that delivers insulin in response to changes in blood sugar levels.

This smart patch, which consists of hundreds of needles the size of a human eyelash, could in the future play the role of a glucometer and at the same time replace the painful injections that people with diabetes sometimes have to do several times a day. The feeling of using the patch can be compared to a mosquito bite. The invention was tested on type XNUMX diabetic mice and proved to be effective for nine hours.

However, before people can use such a patch, a lot of work needs to be done. The researchers hope that their invention will be on the market within two to three years.

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