Mathematics
Midbrain Neurons of the substantia nigra of the midbrain produce
I am sure that Margarita Vasilievna knows much more about this disease than many doctors. “My husband has been ill for eleven years,” she says. “Parkinson’s disease usually creeps up unnoticed. First, a person notices a tremor - a shaking of the hands. And he thinks
Methods for making photonic crystals
Ilya Polishchuk, Doctor of Physical and Mathematical Sciences, Professor at MIPT, Leading Researcher at the National Research Center "Kurchatov Institute" The use of microelectronics in information processing and communication systems has radically changed the world. There is no doubt that the consequences
Chemical and physical properties of hydrogen
Let's look at what hydrogen is. The chemical properties and production of this non-metal are studied in the inorganic chemistry course at school. It is this element that heads Mendeleev’s periodic table, and therefore deserves a detailed description. Brief facts
Tests for the course “Ecology and environmental management”
Legend OS - environment Pollutant - pollutant IZA - air pollution index: low (13) GHG - combustion products PCDC/PCDF - polychlorinated dibenzo(p)chlorodioxins / polychlorinated dibenzochlorofurans Emergency - emergency
On approval of guidelines for the validation of analytical methods for testing medicinal products Example of validation of a quantitative determination method
MINISTRY OF HEALTH OF THE RUSSIAN FEDERATION GENERAL PHARMACOPOEIAL ARTICLE Validation of analytical methods GPM.1.1.0012.15 Introduced for the first time Validation of an analytical method is experimental proof that the method is suitable for solutions
As one of the natural sciences, chemistry studies
Chemistry is a natural science. Like other natural sciences, it studies a certain aspect of nature and natural phenomena. Unlike other natural sciences, chemistry pays close attention to matter. The substance is, for example, water, some
Interdisciplinary connections between chemistry and other disciplines Chemistry in the system of natural sciences
Substance is what physical bodies are made of. There are a lot of substances, and they all differ in properties. For example, sugar and table salt are white crystalline solids, but they differ in taste and solubility in water; water and acetone -
Anionic polymerization: main catalysts, mechanism and kinetics
Lecture 5. Cationic and anionic polymerization. Differences from radical polymerization: the growing chain is not a free radical, but a cation or anion; the catalyst is not consumed during the polymerization process and is not part of the polymer. Depending
Lipids types composition functions
Lipids are fat-like organic compounds, insoluble in water, but highly soluble in non-polar solvents (ether, gasoline, benzene, chloroform, etc.). Lipids belong to the simplest biological molecules. Chemically, most
Copper and its compounds Copper oxide 2 precipitate color
§1. Chemical properties of a simple substance (st. approx. = 0). a) Relation to oxygen. Unlike its neighbors in the subgroup - silver and gold - copper reacts directly with oxygen. Copper exhibits insignificant activity towards oxygen, but in humid conditions
