Foreign
Photochemical processes in the retina
The visual analyzer is a set of structures that perceive light energy in the form of electromagnetic radiation with a wavelength of 400 - 700 nm and discrete particles of photons, or quanta, and form visual sensations. With the help of the eye
Components, phases and structural components of iron-carbon alloys Liberation from bad habits
Topic 17. Basic rules for constructing text. Plan I Consideration of theoretical issues. 1. Text as an integral speech work. 2. Scheme of text construction. Components. 3. Rules for constructing text. Means of interphrase communication. II
General characteristics of nonmetals Biological role of nonmetals in the life of living organisms
Lesson objectives: to summarize, analyze and expand students’ knowledge about non-metals, their role in living and inanimate nature, in human life, the need for proper handling of non-metals, the role of each person in solving environmental problems of the atmosphere;
History of sulfur chemistry. Pure yellow sulfur. Application of sulfur in industry
Sulfur is a substance that is in the table in group 16, under the third period and has an atomic number of 16. It can be found both in native and bound form. Sulfur is designated by the letter S. The known formula for sulfur is (Ne)3s 2 3p
Configuration of macromolecules and stereoisomers
1.3. Configuration of macromolecules The concept of configuration includes a certain spatial arrangement of atoms of macromolecules, which does not change during thermal movement. A transition from one configuration to another is impossible without breaking chemical bonds. Razl
Thin layer chromatography of residual concentrations of pesticides in food products Assessment of hydrophobicity parameters
“Thin layer chromatography of residual concentrations of pesticides in food products” INTRODUCTIONChapter 1. Fundamentals of planar (thin layer) chromatography Chapter 2. State of the art and prospects for the use of modern instrumental methods for the analysis of pesticidesChapter
Application of colloidal surfactants
(specialty "Pharmacy") Goals of studying the discipline "Physical and colloidal chemistry" The fundamental discipline "Physical and colloidal chemistry" is the basis for students to master analytical, organic, pharmaceutical chemistry, toxicological
Alexander Nikolaevich Nesmeyanov - biography
In the 1960s, the former president of the Soviet Academy of Sciences, Nesmeyanov, developed a method for producing yeast from oil. Its first artificial product is protein “black caviar”. A convinced vegetarian himself, he proposed not to send oil abroad, but to use it for
Chemical equilibrium: chemical equilibrium constant and methods of expressing it The chemical equilibrium constant does not depend on
Chemical equilibrium is a state of a chemical system in which one or more chemical reactions occur reversibly, and the rates in each forward-reverse reaction pair are equal. For a system in chemical equilibrium, the concentration
Young Laplace equation drop
In 1804, Thomas Young substantiated the theory of capillary phenomena on the principle of surface tension. He also observed the constancy of the liquid contact angle of a solid surface (contact angle) and found a quantitative relationship connecting the edges
