н-октан

Flammable liquid compounds found in petroleum and natural gas. There are 18 different octanes- they have different structural formulas but share the molecular formula C8H18. ...

абиетин қышқылы

Bahan-bahan kimia; Kimia organik

C 20 H 30 O 2 A tricyclic, crystalline acid obtained from rosin; used in making esters for plasticizers.

альфин катализаторы

Bahan-bahan kimia; Kimia organik

A catalyst derived from reaction of an alkali alcoholate with an olefin halide; used to convert olefins (for example, ethylene, propylene, or butylenes) into polyolefin polymers.

бензотиазоль

Bahan-bahan kimia; Kimia organik

C 6 H 4 SCHN A thiazole fused to a benzene ring; can be made by ring closure from o-amino thiophenols and acid chlorides; derivatives are important industrial products.

целлюлозалық

Bahan-bahan kimia; Kimia organik

Any of the derivatives of cellulose, such as cellulose acetate.

3,5-диаминобензоқышқыл

Bahan-bahan kimia; Kimia organik

C 7 H 8 N 2 O 2 Monohydrate crystals with a melting point of 228_C; soluble in organic solvents such as alcohol and benzene; used in the detection and determination of nitrites.

аланил

Bahan-bahan kimia; Kimia organik

The radical CH 3 CHNH 2 CO_; occurs in, for example, alanyl alanine, a dipeptide.

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Industri / Domain: Liburan Kategori: Liburan keagamaan

Күлгін Сәрсенбі

Ash Wednesday is observed by Christians. Marking the first day of Lent, which lasts until Easter (a period of 46 days), it is the day of repentance. ...