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A closed loop of bonded atoms in a chemical structure, for example, benzene or cyclohexane.

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Secteur d’activité/Domaine : Chimie
Catégorie : Chimie organique
Company: McGraw-Hill
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ішкі сақина

Machines-outils; Armoiries

The inner part of a bearing that fits on a shaft and contains the external raceway for the rolling elements. Sometimes the shaft is stationary and the housing rotates.

сыртқы сақина

Machines-outils; Armoiries

The outer part of a bearing that fits into the housing and contains the internal raceway for the rolling elements.

Сақина бауырластығы

Littérature; Meilleures ventes

Is the first of three volumes of the epic novel The Lord of the Rings by the English author J. R. R. Tolkien. It takes place in the fictional universe Middle-earth. It was ...

сақина жүйесі

Chimie; Chimie organique

Arbitrary designation of certain compounds as closed, circular structures, as in the six-carbon benzene ring; common rings have four, five, and six members, either carbon or some ...

сақина изомеризмі

Chimie; Chimie organique

A type of geometrical isomerism in which bond lengths and bond angles prevent the existence of the trans structure if substituents are attached to alkenic carbons which are part ...

абиетин қышқылы

Chimie; Chimie organique

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

альфин катализаторы

Chimie; Chimie organique

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

Chimie; Chimie organique

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

Chimie; Chimie organique

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

3,5-диаминобензоқышқыл

Chimie; Chimie organique

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

Chimie; Chimie organique

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

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Secteur d’activité/Domaine : Sports Catégorie : Basketball

ойыннан тыс доп

(basketball term) any ball that is not live; occurs after each successful field goal or free-throw attempt, after any official's whistle or if the ...