Science

Information and analytical activity: concept, essence and structure, basic principles. A brief history of the development of this type of mental activity. Description of the technology of carrying out the work. Information sources. Automation of information and analytical activities. Last modified: 2025-01-23 12:01

The development of mathematics in our country, and throughout the world, is inextricably linked with the name of Sergei Lvovich Sobolev. He made a fundamental contribution to this science and laid the foundation for the development of new directions. Sergei Lvovich is rightfully considered one of the greatest mathematicians of the 20th century. We will tell about his life and scientific activity in the article. Last modified: 2025-01-23 12:01

Soviet pathophysiologist Aleksandr Alexandrovich Bogomolets became famous for creating the doctrine of the interaction between the body and the tumor, which radically changed the idea of tumor growth that existed at that time. He was the founder of the Ukrainian and Russian schools of gerontology, endocrinology and pathophysiology, was the founder of the first medical research institutes in Ukraine and Russia. Last modified: 2025-01-23 12:01

The sonorous, expressive voice fascinates and excites. Inspiring intonations call for new achievements. And vice versa - their absence causes boredom and irritation. It turns out that the voice given to man by nature needs conscious development and careful care. Last modified: 2025-01-23 12:01

When studying a school course in physics, an important topic in the section of mechanics is the law of universal gravitation. In this article, we will take a closer look at what it is, and with what mathematical formula it is described, and also give examples of the force of gravity in everyday human life and on cosmic scales. Last modified: 2025-01-23 12:01

Amino acids are substances indispensable for the human body, which are the building material for proteins. What are amino acids? Where are they kept? Which of them are the most valuable for the body?. Last modified: 2025-06-01 07:06

What is RNA polymerase? Why is it necessary in the human body? What is she responsible for?. Last modified: 2025-01-23 12:01

Under the classification of the rights and freedoms of citizens, one should understand their division into certain elements that make up a set of legal norms. Each of them regulates a specific set of relations that arise in society. The types of law existing today are subdivided, in turn, into institutions of law. For example, the Constitution, which serves as a legal norm, the constitutional court are the institutions of constitutional law. Last modified: 2025-01-23 12:01

The theory of acquired needs by D. McClelland is a kind of instruction on how to properly manage subordinates. According to the conclusions, the theory implies three types of personalities who strive for different goals. Based on their preferences and views, the leader must develop the motivation for action in the representatives of a particular group. Last modified: 2025-01-23 12:01

Colluvium, colluvial deposits (Latin colluvio; accumulation, disordered pile) - detrital material accumulated on the slopes of mountains or at their foot by moving from higher areas under the influence of gravity (scree, landslides, landslides) and movement thawing, water-saturated weathering products in the areas of distribution of permafrost rocks. Last modified: 2025-01-23 12:01

The concept of cumulative effect is used in various branches of human activity. It can be encountered not only in the scientific field. Without knowing it, we become participants in a cumulative process when we are busy with daily activities. Last modified: 2025-01-23 12:01

Every person knows that the bodies around us are made up of atoms and molecules. They have different shapes and structures. When solving problems in chemistry and physics, it is often necessary to find the mass of a molecule. Consider in this article several theoretical methods for solving this problem. Last modified: 2025-01-23 12:01

For modern scientists, a black hole is one of the most mysterious phenomena in our universe. The study of such objects is difficult, it is not possible to try them "by experience". The mass, density of the substance of a black hole, the processes of formation of this object, dimensions - all this arouses interest among specialists, and at times - bewilderment. Let's consider the topic in more detail. First, let's figure out what such a hole is. Last modified: 2025-01-23 12:01

The system of education and science in the USSR was considered one of the best in the world. During the Soviet Union, these industries were considered the leading ones, because the development of the economy directly depended on them. Priority then were technical and natural science areas. Thanks to science, the USSR managed to build up a significant scientific and technical potential, consisting of material and spiritual resources, improve production, he althcare, social infrastructure. Last modified: 2025-01-23 12:01

Before determining how great is the role and importance of blastula formation during cell fertilization, it is worth considering the very concept of fertilization. In this article, we will give an exact definition of what a blastula is and what significance it has in the process of fertilization. Last modified: 2025-01-23 12:01

Sodium borohydride: general description, chemical and physical properties. Methods for obtaining a substance in industry. Applications of sodium borohydride in various industries. Production of metal-boron coatings and their performance characteristics. Last modified: 2025-06-01 07:06

When physics studies the process of motion of bodies in non-inertial frames of reference, one has to take into account the so-called Coriolis acceleration. In the article we will give it a definition, we will show for what reason it arises and where it manifests itself on Earth. Last modified: 2025-01-23 12:01

Roxellan's rhinopithecines, or golden snub-nosed monkeys, are very unusual animals in appearance. They have golden hair and short upturned noses. But most of all, the complexion of the monkeys is striking: they have it blue! The article will describe the distinctive features, living conditions, habits of Roxella rhinopithecines. Photos will also be presented. Last modified: 2025-01-23 12:01

Caprolactam is a white crystals, readily soluble in water, alcohol, ether, benzene. When heated in the presence of a small amount of water, alcohol, amines, organic acids and some other compounds, caprolactam polymerizes to form a polyamide resin, from which capron fiber is obtained. An important property of caprolactam is the ability to polymerize with the formation of a valuable polymer - polycaproamide. Last modified: 2025-01-23 12:01

The question of what sulfites are in products is being asked by more and more people. And rightly so, because knowledge of this can prolong a person's life. We find sulfites in food, in particular, in wines and dried fruits, but these preservatives can be found in many other foods, especially fruits and vegetables. Last modified: 2025-01-23 12:01

The innovation process is the gradual transformation of an idea into a product. It can be divided into two main stages: the first stage (it is the longest) includes research and development, the second stage is the product life cycle. Last modified: 2025-01-23 12:01

Reason and mind are two concepts that many people compare and consider identical processes. This opinion is extremely wrong, because these are two different definitions that coexist in the human mind throughout his life. Last modified: 2025-01-23 12:01

Although our Earth feels great in the universe around it, it is just a small planet in the solar system that occupies a huge area. In turn, our solar system is just an integral part of the massive Milky Way galaxy, which includes from 200 to 400 billion stars. So how many galaxies are there in the universe?. Last modified: 2025-01-23 12:01

What elements are included in the social structure? How do they interact with each other? How to evaluate the results of such interaction and can they be considered progressive? Sociology closely studies such a complex organism as human society, since the content and mode of its existence affects the future of new generations. Last modified: 2025-01-23 12:01

Many problems in physics can be successfully solved if the laws of conservation of one or another quantity during the considered physical process are known. In this article, we will consider the question of what is the momentum of the body and the law of its conservation. Last modified: 2025-01-23 12:01

Paraffins are what usually begin the study of carbon chemistry. The simplest organic compounds, which clearly explain the basic principles and features of this section of chemistry. To the general public, however, they are better known as the main component of oil and natural gas. Last modified: 2025-01-23 12:01

Copolymers are one of the types of macromolecular compounds. They are widely used in industry in the form of conventional polymers with additives that improve their thermal and physical-mechanical properties. Most rubbers, synthetic fibers are all copolymers. Last modified: 2025-01-23 12:01

Some initial general information about the chemistry of hydrogen compounds of non-metals. Last modified: 2025-01-23 12:01

A brief review of examples of reactions that do not go according to Markovnikov's rule, and the reasons that cause such a move. Last modified: 2025-01-23 12:01

Explanation of the term variance and method of finding. Last modified: 2025-01-23 12:01

A brief description of one of the types of optical isomerism. Last modified: 2025-01-23 12:01

If you suddenly imagine yourself as a great alchemist or colorful mad scientist, here is an instruction for one of the most extravagant ways to make a dream come true: effectively dissolve something gold. Last modified: 2025-01-23 12:01

The main components of starch, their chemical formulas, properties, reactions. Last modified: 2025-01-23 12:01

A small reference description of the main properties of nitroglycerin, methods for its preparation in the laboratory and (as an addition) theoretical methods for its synthesis in an artisanal way. Nitroglycerin is an extremely unstable explosive substance, when handling it, do not forget to follow safety precautions. Last modified: 2025-01-23 12:01

Unlike eukaryotes, bacteria do not have a formed nucleus, but their DNA is still not scattered throughout the cell, but is concentrated in a compact structure, which is called a nucleoid. In functional terms, it is an analogue of a nuclear apparatus. Last modified: 2025-01-23 12:01

Rutherford Ernest (years of life: 08/30/1871 - 10/19/1937) - English physicist, creator of the planetary model of the atom, founder of nuclear physics. He was a member of the Royal Society of London, and from 1925 to 1930 - and its president. This man is the winner of the Nobel Prize in Chemistry, which he received in 1908. Last modified: 2025-01-23 12:01

Much in quantum mechanics remains beyond understanding, much seems fantastic. The same applies to quantum numbers, the nature of which is still mysterious today. The article describes the concept, types and general principles of working with them. Last modified: 2025-01-23 12:01

Consideration of some issues within the framework of a school mathematics course is not always possible. For example, this applies to the classification of numerical sets - it is only touched upon in passing. Rational, irrational and many others - where do they meet, what are they used for?. Last modified: 2025-01-23 12:01

In molecular genetics, the processes of DNA, RNA and protein synthesis are divided into three stages for convenience of description: initiation, elongation and termination. These stages describe different mechanisms for different synthesized molecules, but always mean "beginning", "progress" and "end". Last modified: 2025-01-23 12:01

Can we theoretically calculate in which areas gold ore is deposited, determine the amount of its reserves in a particular deposit, in order to decide whether it is profitable to build a mining enterprise here? After all, exploration, drilling of deep wells and exploration mines takes years and more than one thousand dollars. Are there any signs by which the presence of precious metal in the depths of the earth's interior is guessed?. Last modified: 2025-01-23 12:01