tannin

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Related to Tannins: tannic acid

tannic acid

 [tan´ik]
a substance obtained from nutgalls, oak bark, and other plant parts, formerly used in medicine as an astringent. It is no longer used alone because it can be absorbed through mucous membranes or damaged skin in amounts sufficient to produce hepatic necrosis, although it is still used as a component of dermatological preparations.

tan·nin

(tan'in),
Any one of a group of complex nonuniform plant constituents that can be classified into hydrolyzable tannins (esters of a sugar, usually glucose, and one or several trihydroxybenzenecarboxylic acids) and condensed tannins (derivatives of flavonols). Tannins are used in tanning, dyeing, photography, and as clarifying agents for beer and wine. Sometimes used synonymously with tannic acid. Tannins form black stains in the presence of iron.

tannin

Herbal medicine
Any of a family of compounds that react with proteins to produce a leathery coating on animal tissues and give woods their brown, red and yellow hues; tannins are anti-inflammatory, antimicrobial and astringent.

tan·nin

(tan'in)
A complex nonuniform plant constituent; used in tanning, dyeing, photography, and as clarifying agents for beer and wine.

tannin

a complex organic compound occurring widely in plant sap, particularly in bark, leaves and unripe fruits, that is used in the production of leather and ink.

tan·nin

(tan'in)
Complex nonuniform plant constituent used in tanning, dyeing, photography, and as clarifying agents for beer and wine. Sometimes used synonymously with tannic acid.
References in periodicals archive ?
However, research also suggests that different kinds of tannins work differently for our body.
Methane emission by goats consuming different sources of condensed tannins. Anim Feed Sci Technol 2008;144:228-41.
Through various analyses, they found that the Cabernet Sauvignon contained more, larger and more highly pigmented tannins than the Pinot Noir, and these tannins formed more protein aggregates in saliva.
Based on previous research that examined the interaction of anthocyanins and tannins, it has been suggested that the A:T ratio plays an important role in polymeric pigment formation because both tannin and anthocyanin are needed for development of polymeric pigments.
The tannins and oak are balanced nicely in this bargain of a Napa cabernet.
Rich black currant aromas lead to big dark fruit flavors with crushed stone and notes of tobacco that finish with soft and subtle tannins. Certainly a value for the price.
Soluble tannins content were assessed by spectrophotometry, using the Follin-Ciocalteau (50%) reagent, according to the Taira (1995) technique.
Full-bodied, balanced, with dry tannins, it has a strong character.
These reductions may be attributed to the presence of the high levels of tannins in raw oak acorn.
They are chemically diverse family of compounds ranging from simple phenolic acids to very large and complex polymers such as lignins and tannins. Also including are flavonoids, phenolics, tannins etc [13].
Medium body, tannins, this is a very well structured, mellow, long-lasting flavour with smooth, light, velvety tannins, accents of earth, tobacco and spice as they linger on the tangy finish.
This study mainly focused on the effect of tannins against both reference and clinical strains of MRSA by means of antimicrobial assays and a next-generation sequencing (NGS) approach.