[i:b]Centrifugation[/i:b] [i:note num=1/]

Lemma

Centrifugation 1

Etichetta di dominio

EN

Etichetta grammaticale

n.

Definizione

Once-fashionable wine-making operation of clarification using a centrifuge.2

Nota

Centrifuges work by speeding up the sedimentation of particles. In a centrifuge, the acceleration due to gravity in sedimentation is replaced by the centrifugal force generated by the spin of the centrifuge. Centrifuges can work at very high speeds (often up to 10,000 rpm) and have very high flow-rate. Most are now self-decanting(automatic extraction of lees), and those used for sparkling wines are completely hermetically sealed. Their uses
include:
· Rapid clarification of musts
· Removal of yeasts during fermentation to slow down the alcoholic fermentation
· Post-fermentation clarification, removing yeasts,particularly for stopped fermentations
· Immediate clarification of fined wines
Centrifuges are excellent for removing dense particles, such as bits of grape skin, but will only remove a proportion of them: they never lead to their complete elimination. Centrifuges are also expensive and very noisy,but they are often used as they have a very high flow-rate, and can handle quite high solid levels. Modern centrifuges can be very effective if run sensibly.

3

Contesto

Removal of the suspended material during aging is called clarification. The major procedures involved are fining, filtration, centrifugation, refrigeration, ion exchange, and heating.

4

Trascrizione fonetica

/sεnˌtrɪfjuˈgeɪʃn/ 5

Sinonimi e Antonimi

high-speed spinning 4

Abbreviazioni
ND
Etimologia

c.1721, with adj. suffix -al (1) + Mod.L. centrifugus, 1687, coined by Sir Isaac Newton in "Principia," from L. centrialternative comb. form of centrum "center" (see center) + fugere "to flee" (see fugitive). Centrifugal force is Newton's vis centrifuga.

6

Etichetta di paese
ND
Ente

Università degli Studi di Genova, Facoltà di Lingue e Letterature Straniere, Corso di Laurea in Teorie e Tecniche della Mediazione Interlinguistica.

Data della scheda
Mon Oct 1 13:10:39 2012
Autore

Fameli Federica

Fonti

1 : www.garzantilinguistica.sapere.it

2 : Robinson J., The Oxford Companion to WINE, Oxford, Oxford University Press, 1994, p. 203

3 : www.wineskills.co.uk

4 : www.britannica.com

5 : Zanichelli Electronic Dictionary, Il Ragazzini Dizionario Inglese-Italiano, Italiano Inglese

6 : www.etymonline.com

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