Chelated forms of chemical compounds: description, examples, features. Obtaining substances and their use in agriculture, production and medicine. Major chelating agents. Impact on animal he alth, human he alth and plant growth. Last modified: 2025-01-23 12:01
Science
Dicarboxylic acids are substances containing two functional monovalent carboxyl groups - COOH, which determine their acidic properties. However, this definition is short. In fact, much more can be said about these compounds, so now it is worth paying attention to the most interesting, useful and important facts regarding their chemical and physical properties, the production process and the areas in which they have found their application. Last modified: 2025-01-23 12:01
Lanthanides and actinides are two families that contain 14 chemical elements each, as well as the metals themselves - lanthanum and actinium. Their properties - both physical and chemical - will be considered by us in this paper. Last modified: 2025-01-23 12:01
In 1910, the American physicist P. Bridgman and the German researcher G. Tamman discovered that ice can form several polymorphic crystalline modifications. Now 9 modifications of ice are known, they have different crystal lattices, different densities and melting points. The ice we all know well is called "ice I", other modifications of ice exist at pressures exceeding 2000 atm. Last modified: 2025-01-23 12:01
The autonomic nervous system is divided into sympathetic and parasympathetic. Each of the departments performs functions that have a supporting and stimulating effect on the internal environment of the body. Last modified: 2025-01-23 12:01
Anatomically, our body is divided into topographic regions with various organs, neurovascular bundles and other components located within them. In this article, we will consider the planes and axes of the human body. Last modified: 2025-01-23 12:01
When we receive a complete blood count, we cannot figure it out without the help of a doctor. Meanwhile, some indicators need to be known in order to at least a little navigate the situation. A separate column in the analysis form is the number of monocytes, which monitors the patient's recovery. For example, if after suffering a sore throat, an increased number of monocytes persists for a long time, then the doctor may suggest the development of incipient rheumatoid inflammation. Last modified: 2025-01-23 12:01
Systems created by man are called agrosystems. People can plow the land, plant trees, but no matter what we do, we have always been surrounded and will be surrounded by nature. This is some of its peculiarity. How are agroecosystems different from natural ecosystems? This is worth looking into. Last modified: 2025-01-23 12:01
Gnomon is an ancient astronomical instrument that allows you to determine the angular height of the sun by the smallest length of the shadow of its column. Such peculiar watches were created a long time ago, they helped to determine the time on a sunny day. The sun here just plays a key role, more precisely, the shadow from it. In other words, the gnomon is the simplest sundial. Last modified: 2025-01-23 12:01
Keldysh Mstislav Vsevolodovich - Soviet scientist in the field of mathematics and mechanics, academician and president of the USSR Academy of Sciences. Played a key role in the Soviet space program. Last modified: 2025-06-01 07:06
Cold fusion - what is it? Myth or reality? This direction of scientific activity appeared in the last century and still excites many scientific minds. Many gossip, rumors, speculations are associated with this type of thermonuclear fusion. Last modified: 2025-01-23 12:01
Entire books have been written about different types of energy. Many scientists conduct different experiments in this area. For humanity, this is one of the most topical issues. With the development of technology, we have become almost completely dependent on power sources. Therefore, many are interested in what energy is, what it is and how it is used. Last modified: 2025-01-23 12:01
A complex protein, in addition to the protein component itself, contains an additional group of a different nature (prosthetic). Carbohydrates, lipids, metals, phosphoric acid residues, nucleic acids act as this component. What is the difference between simple proteins and complex proteins, what types of these substances are divided into, and what are their features, this article will tell. Last modified: 2025-01-23 12:01
Anatomical topography is a section of anatomy that studies the layered structure of human body regions, the location of organs relative to each other, holotopy and skeletopy, as well as blood supply and lymph flow during normal development of the body and in pathology, taking into account all age and gender characteristics person. This section of anatomy is of great importance for medicine, as it represents the theoretical basis for operative surgery. Last modified: 2025-01-23 12:01
The type of chemical bond in a substance determines its structure and properties. From them, in turn, depends on its role in the environment and the possibility of using it in various areas of human life, from gardening to space exploration. Last modified: 2025-01-23 12:01
The tertiary structure of a protein is the way in which a polypeptide chain is folded in three-dimensional space. This conformation arises due to the formation of chemical bonds between amino acid radicals remote from each other. This process is carried out with the participation of the molecular mechanisms of the cell and plays a huge role in giving proteins functional activity. Last modified: 2025-01-23 12:01
Every living organism goes through a certain life cycle: from conception (laying) to death (death), and plants are no exception. Their distinguishing feature is the process of reproduction, which consists in the alternation of sporophyte and gametophyte. Last modified: 2025-01-23 12:01
The largest number of muscles is located on the face. Their main distinguishing characteristic is that they have only one fixed end on the bone structures, and the second is woven into soft tissues, forming a mobile point of attachment. Last modified: 2025-01-23 12:01
One of the most ancient and important sciences for people is anatomy. And not only the one that concerns directly the person. Methods for studying the anatomy of plants and animals also made it possible to understand a lot about the structure of the world. Last modified: 2025-01-23 12:01
Protein synthesis is a very important process for every cell. The functions of proteins are diverse; the life of any organism depends on their proper functioning. The article describes the main components of the protein synthesis system and the stages of translation. Last modified: 2025-01-23 12:01
Translation is an important and difficult process to understand. To explain protein biosynthesis concisely and clearly, one must start from the basics of cell structure and biochemistry. But we tried to tell as simply as possible about how protein chains are created in any living cell. Last modified: 2025-01-23 12:01
Amazing energy stations of the cell - who are they? How mitochondria are arranged, what they are used to doing and what danger their DNA poses - all this in our article. Last modified: 2025-06-01 07:06
We so often hear about nerves, we say that these cells do not regenerate, many times we notice how we do something completely automatically…Understand the actions of our brain, understand how nervous tissue is arranged, structure and functions this amazing system, you can by reading this article. Last modified: 2025-01-23 12:01
Molecular biology studies the structure and functions of molecules of organic substances that make up the living cells of plants, animals and humans. A special place among them is given to a group of compounds called nucleic (nuclear) acids. Last modified: 2025-01-23 12:01
In nature, there are living organisms whose dimensions are so small that it is simply impossible to see them with the naked eye. They are observed by scientists only with the help of microscopes of high magnification. Last modified: 2025-01-23 12:01
What is the Raven matrix? It is believed that this is just an intelligence test, but is it really so? In the article we will talk about the test and its legendary creator. Last modified: 2025-01-23 12:01
There are many classes of different animals in nature. One of them is fish. Many people do not even suspect that these representatives of the animal world have a brain. Read about its structure and features in the article. Last modified: 2025-01-23 12:01
Today we will talk about LII them. Gromov. We will talk about what this institution is like, dive a little into its history, and also learn about the most significant incidents. Read all about it in the article below. Last modified: 2025-01-23 12:01
In this article, we will look at how glucose is oxidized. Carbohydrates are compounds of the polyhydroxycarbonyl type, as well as their derivatives. Characteristic features - the presence of aldehyde or ketone groups and at least two hydroxyl groups. Last modified: 2025-01-23 12:01
Complex metabolic reactions in plants are explained by the special structure of their body parts: root, stem, leaves, called vegetative organs. They are responsible for the processes of photosynthesis, transpiration, osmosis. In this work, we will study the structure and functions of such plant elements as root hairs. These are important structures that determine the absorption of water and mineral s alts from the soil. Last modified: 2025-01-23 12:01
Few people think every day about what exactly to eat and how to optimally build their diet. Unfortunately, only people with serious he alth problems most often think about nutrition. Everyone knows that the diet should be protein. What is this substance?. Last modified: 2025-01-23 12:01
All matter in the Universe consists of small building blocks - atoms. And the electronic configuration of this structural unit of any substance forms its individual qualities. Penetration into the secrets of the nuclear-electronic model of the atom gave world science a grandiose impetus to accelerate on the thorny path of progress. Last modified: 2025-01-23 12:01
Propionic acid bacteria, the properties of which will be discussed below, are united by the genus Propionibacterium. It, in turn, belongs to the Propionibacteriaceae family. Let us consider in more detail what characteristics propionic acid bacteria have, where these microorganisms are contained and used. Last modified: 2025-01-23 12:01
Heredity is the most important ability of living organisms to transfer all their properties and functionality to new generations. And the defining feature of heredity is combinative variability, with the help of which living organisms are endowed with purely individual qualities and a unique gene combination. Without this ability, the evolutionary process and natural selection would not be possible. Last modified: 2025-01-23 12:01
Earth is our beautiful blue home in the vast harsh universe that stretches across the vast expanses of our space. Our planet is amazing and unique, it has ideally formed conditions for the origin of life of organic origin. An important role was played by the chemical composition, the presence of the atmosphere and the magnetic field for its appearance and prosperity in all varieties. Last modified: 2025-01-23 12:01
The history of technology parks began in the fifties of the last century. It was at this time that Stanford University, located in the state of California (USA), decided to lease out empty premises and unused land. Agreements were signed with various organizations. Last modified: 2025-01-23 12:01
The bipolar system of the world is the next stage in the development of mankind. It compares favorably with monopolarity in most indicators. Last modified: 2025-01-23 12:01
Each of us probably dreamed about space in childhood, dreamed of exploring the Universe, feeling it, but to carry these aspirations through the years and not everyone can fulfill them. Last modified: 2025-01-23 12:01
Dark matter and energy, according to the latest data, make up most of the entire matter of the Universe. Little is known about their nature. Different opinions are expressed, including those characterizing unknown substances as fiction. Last modified: 2025-01-23 12:01
In judicial practice, forensic examination of documents is often assigned. This is an effective tool for establishing the circumstances of the case. What is this study and what are its types, we learn from the article. Last modified: 2025-01-23 12:01