What problem did Mendeleev consider the most urgent for the 20th century? Detailed answer

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What problem did Mendeleev consider the most urgent for the 20th century? Detailed answer

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What problem did Mendeleev consider the most urgent for the 20th century?

Mendeleev, based on the fact that the number of horses should grow at the same rate, considered the most difficult technical problem of the 20th century to be the disposal of a huge amount of manure.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How do antibiotics work?

Antibiotics are chemicals. Once in the body, they kill or stop the growth of certain microbes, helping the body fight disease. The name "antibiotics" has been used in relation to these drugs since 1942. The word is derived from two Greek words meaning "against life." Antibiotics work against life forms we call germs and bacteria. Many antibiotics are made from microbes.

Microbes are small living organisms. For example, bacteria and molds are also microbes. The microbes used to make antibiotics are chosen for their ability to produce chemicals that can "wage war" against disease-causing microbes. In other words, man takes advantage of the struggle that takes place between microbes in nature. Microbes are constantly fighting for survival. In the process of this struggle, they produce rather complex chemical compounds. Investigating microbes, scientists found in them substances that can destroy pathogenic bacteria. If such chemicals are produced in the laboratory, and in large quantities, they can be used as raw materials for the manufacture of antibiotics.

How do antibiotics treat diseases? How do they get to the right part of the body where they need to work? How do antibiotics stop the growth of certain microbes? It may sound rather strange, but scientists have not yet come to an unambiguous answer to these questions. Some scientists believe that antibiotics block the access of oxygen to pathogenic bacteria. Without oxygen, they cannot reproduce.

Others believe that antibiotics prevent bacteria from getting nutrients from the patient's body, and they die of starvation. Still others believe that pathogenic bacteria confuse their usual food with antibiotics, "eat" them and "poison". Probably antibiotics work in different ways.

The same antibiotic can act differently on different bacteria. On one occasion, he kills them. In the other, it only weakens them and enables the natural protective resources of the body to fight the disease themselves.

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A group of physicists from Switzerland, England and France recently synthesized a material from aluminum and silicon that changes its resistance upon impact by almost 900 times. It is believed that thanks to this discovery, the size of piezoelectric sensors can be reduced to such an extent that they can be embedded in electronic microcircuits and nanotechnology.

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