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Hydrogen index (pH factor)
In this article we answer the questions of what the acidity of wine is and how it is determined. What is pH and why should consumers know it? What is alcohol level? Degree of alcohol One of these abbreviations is very simple - ABV means “alcohol by volume”
Toxic effects of hazardous chemicals on humans
Toxicity (from the Greek toxikon - poison) - poisonousness, the property of certain chemical compounds and substances of biological nature, when ingested in certain quantities into a living organism (human, animal and plant), to cause disturbances in its physiological functions
Naphthalene oxidation reaction
The simplest of the condensed benzenoid hydrocarbons is naphthalene: Positions 1,4,5 and 8 are designated “α”, positions 2, 3,6,7 are designated “β”. Methods of preparation. The bulk of naphthalene is obtained from coal tar. In laboratory conditions, naphthalene
Electrochemistry of photonic crystals From simple crystals to photonic ones
Classification of methods for manufacturing photonic crystals. Photonic crystals are very rare in nature. They are distinguished by a special rainbow play of light - an optical phenomenon called iridescence (translated from Greek - rainbow). To such mines
Physico-chemical methods for analyzing drugs Chemical methods for analyzing drugs
As is known, pharmacopoeial analysis aims to establish the authenticity, determine the purity and quantify the active substance or ingredients of a complex dosage form. Despite the fact that each of these stages of pharmacopoeial analysis is
Formulas and units of measurement
When typing text in the Word editor, it is recommended to write formulas using the built-in formula editor, keeping the default settings in it. It is allowed to type formulas in a larger font than the text, if necessary for ease of reading
H2O2 - what is this substance
The formula for the basis of life - water - is well known. Its molecule consists of two hydrogen atoms and one oxygen, which is written as H2O. If there is twice as much oxygen, then a completely different substance will be obtained - H2O2. What is it and what is the resulting substance used for?
Deryagin-Landau-Fairway-Overbeck Theory of Coagulation Influence of Electrolytes on Electrokinetic Potential
Concerning the technology of many dosage forms. Statement of the rule: Explanation of the rule Particles of the drug substance have cracks (Griffith's slits) into which liquid penetrates. The liquid exerts disjoining pressure on the particle, which exceeds
Individual properties of formic acid
Formic acid is a monobasic carboxylic acid registered as a food additive with code E236 according to the international classification, which is used as a preservative. It is considered the first representative in a series of saturated monobasic carbs
Use of gaseous and liquid neon in industry Who is neon
The Russian language is very rich and diverse. It often contains lexical units that came from other languages. It often happens that one word has several meanings at once. Uneducated people may confuse them and apply certain terms to the wrong people.
