Tanning is the process of converting raw skin and hides from different animals into a sustainable manageable material called leather. Leather making very long consists many chemical mechanical steps. The most important step whole leather tanning step, which performed commonly either by vegetable or mineral tanning. More than 85-90% chrome tanning, common type currently applied.

This publication provides a comparative description of the chemical composition silver speedwell (Veronica incana L.). We chose three different regions Yakutia as objects study, namely: Megino-Kangalas District (Central Yakutia); Vilyuisk (Western Oymyakon (Eastern Yakutia). The content certain groups substances (phenolic compounds, tannins, flavonoids, and phenylpropanoids) in vegetable raw ma...

The article presents data on studying the influence of fat content in fish raw materials organoleptic parameters and vegetable products (snacks) their nutritional value. These are interest to devel-opers new types (snacks). During research, following stages have been highlighted: determining chemical composition materials, evaluation finished products, assessment value product. For preparation ...