Chemical and electrochemical assessment of tannins and aqueous primers containing tannins
نویسندگان
چکیده
منابع مشابه
Tannins of Constant Structure in Medicinal and Food Plants—Hydrolyzable Tannins and Polyphenols Related to Tannins
In addition to the commonly used classification as hydrolyzable tannins and condensed tannins, tannins can also be categorized into two other types: polyphenols of constant chemical structure (Type A) and polyphenols of variable composition (Type B). Both types of tannins and related polyphenols account for a large part of plant polyphenols, but accurate structure-activity correlations on a mol...
متن کاملTannins: classification and definition.
The name ‘tannin’ is derived from the French ‘tanin’ (tanning substance) and is used for a range of natural polyphenols. Since ancient times it is known that certain organic substances have tanning properties and are able to tan animal skins to form leather. Prehistoric tribes already knew about the tanning of protective animal hides with brain material and the fat of the killed animals. Howeve...
متن کاملReview. Tannins and ruminant nutrition
Tannins are a complex group of polyphenolic compounds found in a wide range of plant species commonly consumed by ruminants. They are conventionally classified into two major groups: the hydrolysable and the condensed tannins. Although for a long time tannins were thought to be detrimental to ruminants, their effect may be either beneficial or harmful depending on the type of tannin consumed, i...
متن کاملDoes Propolis Contain Tannins?
Although polyphenols have been reported as common constituents of propolis, tannins have rarely been mentioned as its constituents. Propolis samples from seven localities in Brazil were analyzed for detection of proanthocyanidins (condensed tannins) and determination of the tannin content. Positive reaction for proanthocyanidins was observed for all samples tested. The contents of tannins varie...
متن کاملOak - Bark Tannins
1. The colorimetric method for estimation of acetoacetate by reaction with diazotizedp-nitroaniline has been adapted for measurements of oxaloacetate in amounts of 0 003-0 03 Htmole. 2. The steady-state level of oxaloacetate in the livers of normal and fasted rats was found to be about 4 umoles/100 g. dry wt. of tissue. The level was essentially unchanged in starvation when the level of acetoac...
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ژورنال
عنوان ژورنال: Surface Coatings International
سال: 1998
ISSN: 1356-0751
DOI: 10.1007/bf02693869