TERMIUM Plus®

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ALPHA CELLULOSE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-08-30

English

Subject field(s)
  • Chemical Elements and Compounds
  • Biochemistry
CONT

Cellulose esters are synthetic polymers prepared from a renewable resource, cellulose, which is a natural polymer and a major component of plant-cell walls. Isolation of cellulose from trees or plants provides a raw material for many major commercial products, including cellulose esters. Cellulose is an unbranched polymer consisting of a chain of repetitive anhydroglucose units linked together through a 1,4-β-glycosidic linkage ... This cellulose chain is commonly known as alpha-cellulose, the percentage of which is often used to describe the purity of a cellulose material.

CONT

In the chemical industry, cotton linter pulp is the only source for cellulose with 99+% alpha cellulose; ...

OBS

The word "alpha" must be replaced by the corresponding Greek letter or italicized.

Key term(s)
  • a-cellulose
  • a cellulose

French

Domaine(s)
  • Éléments et composés chimiques
  • Biochimie
CONT

Le bois est composé principalement de cellulose, soit jusqu'à 70 pour cent du poids du bois sec. Il en existe deux types dont la cellulose alpha, ou cellulose normale, qui est un élément de prime importance pour la fabrication du papier.

OBS

Le mot «alpha» doit être remplacé par la lettre grecque correspondante ou s'écrire en italique.

Key term(s)
  • cellulose a

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Bioquímica
Key term(s)
  • a-celulosa
Save record 1

Record 2 2013-08-30

English

Subject field(s)
  • Pulp Preparation (papermaking)
  • Chemical Engineering
DEF

A term used to define the purity of isolated cellulose according to its solubility in alkali.

CONT

The alpha-cellulose is that portion of pulp which does not dissolve in 18% aqueous NaOH. The greater the quantity of alpha-cellulose present, the higher the purity of the material. However, alpha-cellulose is not necessarily pure cellulose, since alkali-soluble glycans may still be combined with it.

OBS

The word "alpha" must be replaced by the corresponding Greek letter.

Key term(s)
  • a-cellulose
  • a cellulose

French

Domaine(s)
  • Préparation de la pâte à papier
  • Génie chimique
DEF

Terme utilisé pour définir la pureté de la cellulose obtenue et relié à sa solubilité en milieu alcalin.

CONT

La cellulose alpha est la fraction de la pâte qui est insoluble dans une solution aqueuse de soude caustique (NaOH) à 18 %. Plus il y a de cellulose alpha, plus la pâte est pure. Cependant, la cellulose alpha n'est pas nécessairement de la cellulose pure puisqu'elle peut être combinée à d'autres polysaccharides solubles en milieu alcalin.

OBS

Le mot «alpha» doit être remplacé par la lettre grecque correspondante.

Key term(s)
  • cellulose a
  • a-cellulose
  • a cellulose

Spanish

Campo(s) temático(s)
  • Preparación de la pasta (fabricación de papel)
  • Ingenieria química
DEF

Tipo de celulosa con el mayor grado de polimerización.

Key term(s)
  • a-celulosa
Save record 2

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