tannin

Lemma

tannin

Etichetta di dominio

EN

Etichetta grammaticale

n.

Definizione

Astringent acid imparted by stalks, pips and skins in the making of red wines, noticeable by a gum-frying sensation on the palate; it helps to preserve wine as it matures. 1

Nota

The chemical process in which tannins modifies saliva is actually quite interesting. The tannin molecules combine with the protein molecules in our saliva-destroying the saliva's ability to lubricate the mouth. The amount, or extent in which the tannins may cause astringency is a strong function of the polymerization of the tannin molecule. Typically, as a wine ages, the degree polymerization of the tannin actually increases for the first few years so wines will be more tannic in this stage. But, once the tannin molecules reach a high degree of polymerization, they actually begin to lose the capability to combine with the proteins in saliva so the astringency associated with the tannin will be decreased, while the favorable characteristic of the tannin will be maintained. In addition, during this period some of the tannins will begin participate out of the wine. At this point, the wine has reached its ideal period in which to drink--known as the "maturity plateau". 2

Contesto

Tannins in grape skins and seeds (the latter being especially harsh) tend to be more noticeable in red wines, which are fermented while in contact with the skins and seeds. 5

Trascrizione fonetica

[ˈtæn ɪn] 4

Sinonimi e Antonimi

Abbreviazioni

Etimologia

Vegetable substance capable of converting animal hide to leather, 1802, from Fr. tannin (1798), from tan "crushed oak bark containing tannin" (see tan). Tannic acid first recorded 1836, from Fr. acide tannique, inroduced 1834 by Pelouze. 3

Etichetta di paese
ND
Ente

Università degli Studi di Genova, Facoltà di Lingue e Letterature Straniere, Corso di Laurea per Traduttori e Interpreti

Data della scheda
Fri Jun 6 00:00:00 2008
Autore

Rocío Sara Quinto Cotarate, r. Barbagianni

Fonti

1 : A. Durkan, J. Cousins, Wine Appreciation, Reading, Berkshire, Cox & Wyman, 1997, p. 179.

2 : «http://www.pressedforwine.com/ingredients/tannin.shtml», (22/01/2008)

3 : «http://www.etymonline.com/index.php?search=tannin&searchmode=none », (22/01/2008)

4 : «http://dictionary.reference.com/search?q=tannin », (22/01/2008)

5 : «http://en.wikipedia.org/wiki/Tannin », (22/01/2008)

Ritorna alla Barra di Navigazione