TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

[A] process that impregnates paper with an alkaline reserve to neutralize the active acid in the paper substrate and act as a buffer to neutralize acids produced in the future.  2, record 1, English, - deacidification

Record number: 1, Textual support number: 1 CONT

The development of a viable mass deacidification process has long been considered the answer to the problems of conservation in the library field. Acid, inherent in the untreated wood pulp, introduced into the paper in the manufacturing process, or caused from contact with polluted air, breaks the links in the cellulose polymer chains causing the fibers to break down; the paper becomes discolored and brittle, losing both permanence and durability very quickly.... Deacidification does arrest the acid attack and, if adequate buffers are left in the paper, prevents it from recurring, but does not restore embrittled and discolored books to their original state.  3, record 1, English, - deacidification

Record number: 1, Textual support number: 1 OBS

Deacidification lengthens the life expectancy of paper several times its ordinary life.  2, record 1, English, - deacidification

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

[Processus] complexe qui permet, grâce à un agent alcalin (gazeux ou liquide), de neutraliser les acides présents dans le papier et de fournir une réserve alcaline dans le but de prolonger la durée de vie des documents.  2, record 1, French, - d%C3%A9sacidification

Record number: 1, Textual support number: 1 CONT

[Toute] restauration devrait permettre d'obtenir une stabilisation mécanique et chimique ainsi qu'une meilleure lisibilité du document, et permettre d'en faciliter la consultation et la mise en exposition. Quelques-uns des traitements, les plus courants, sont le dépoussiérage, le nettoyage à sec, le marouflage (action qui consiste à coller du papier ou de la toile sur un support pour le consolider), le traitement aqueux, la désacidification et la pose de renforts.  3, record 1, French, - d%C3%A9sacidification

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

In large areas, such as sports centres, indoor swimming pools etc. untreated surfaces lead to different rates of decline of the sound field in a room. This in turn will often lead to a longer reverberation time, compared to a calculation using the simple Sabine formula.  3, record 2, English, - Sabine%20formula

Record number: 2, Textual support number: 2 CONT

The reverberation time (RT) of a room or concert hall is the time it takes for a sound to decay 60 dB from its initial sound pressure level. This quantity can be measured directly or can be expressed via the Sabine formula.  4, record 2, English, - Sabine%20formula

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Le temps de réverbération T d'une salle s'exprime en fonction de son volume V et de son traitement acoustique par la formule de Sabine.  4, record 2, French, - formule%20de%20Sabine

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

An area reserved for crop cultivation but left free of chemical treatment.  2, record 3, English, - untreated%20field

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish