resin acids

res·in ac·ids

(rez'in as'idz),

A class of organic compounds derived from various natural plant resins; diterpenes containing a phenanthrene ring system; for example, abietic acid, pimaric acid, ester gums.

Synonym(s): resinic acids

Mentioned in ?

References in periodicals archive ?

The main component of rosin is the mixture of C20 monocarboxylic diterpenic resin acids including the abietic-type acids and pymaric-type acid, and percentage of these resin acids in the rosin is ca.

Synthesis of Allyl Dimethyl Dehydroabietyl Ammonium Chloride and its Surface Activities

Some authors attribute the genotoxic effects mainly to resin acids (abietic and dehydroabietic acid; Fernandez et al., 2007) and sterols (Lehtinen et al., 1999) contained in the kraft mill effluents.

Genotoxic effects of kraft pulp mill effluents treated by biological aerobic systems/Efectos genotoxicos de efluentes provenientes de celulosa kraft tratados por sistemas biologicos aerobicos/Efeito genotoxico de efluentes a partir de celulose kraft tratados por sistemas biologicos aerobicos

The relative density, growth rate, and chemical composition of the extractives (fatty and resin acids, nitrogen, and reducing sugar contents) were determined.

Effect of chemical and physical properties on the decay susceptibility of southern pine sapwood decking in two aboveground exposures

The normal products of wood include tannins, resin acids. stillbenes, and lignin among other compounds.

Effects of pine tree extract on Xenopus laevis

Natural resin acids present in rosin of Pinus spez., including isopimaric acid (1), mercusis acid (2), neoabietic acid (3), dehydroabietic acid (4), and podocarpic acid (8), as well as resin acid derivatives [beta], 9 [alpha], 13 [alpha]-H-tetrahydroabietic acid (5), 8 [alpha], 9 [alpha], 13[alpha],-H-terahydroabietic acid (6), 13 [alpha],-H-[delta] (8) -dihydroabietic acid (7), maleopimaric acid (9), and fumaropimaric acid (10), were studied for their possible inhibitory effects on Epstein-Barr virus early antigen (EBV-Ea) activation induced by 12-O-tetradecanoylphorabol-13-acetate (TPA).

Cancer chemopreventive activity of "rosin" constituents of Pinus spez. and their derivatives in two-stage mouse skin carcinogenesis test

In addition to lignin, the ethanol used to obtain it is recovered and recycled; furfural, acetic acid, valuable extractives (resin acids, terpenes, fatty acids, phytosterols) are isolated; and the cellulose and hexose sugars derived from hemicellulose are subjected to enzymatic conversion/fermentation to fuel ethanol.

New Biorefineries could provide raw material for coatings

Examples include carrageenan from kelp, biodiesel from vegetable oils, and resin acids from the "extractives" of trees.

Biorefining the future: modern biorefineries refined and redefined

Using the previously described laboratory scale reactors, single-stage UV degradation, single-stage biological degradation, and two-stage UV-biological degradation schemes were evaluated and compared for rate of degradation, degree of mineralization, and residual concentration of the target resin acids. The results indicate that photolysis by either UV254 or broad band UV/vis radiation is a powerful degradation method for the target compounds and also is an effective pre-treatment method for resin acid biodegradation.

Two is better than one: using UV in pre-treatment for removal of organics in industrial effluents

In alkaline conditions, such as in kraft pulping, the triglycerides are completely saponified, and the free fatty acids and resin acids are dissolved, but sterols and some steryl esters and waxes do not form soluble soap and tend to deposit and cause pitch problems.

Spectroscopic characterization of extractives isolated with MTBE from straws

Composed mainly of cellulose, polyoses, and lignin, wood dust may contain a variety of nonpolar organic extractives (fatty acids, resin acids, waxes, alcohols, terpenes, sterols, steryl esters, and glycerols), polar organic extractives (tannins, flavonoids, quinones, and lignans), and water-soluble extractives (carbohydrates, alkaloids, proteins, and inorganic material) (20).

Sawmill Chemicals and Carcinogenesis

Spruce sawdust contained considerably lower amounts of fatty and resin acids than pine.

Emission of volatile organic compounds from softwood pellets during storage

Many acetone soluble polar components, including oxidized resin acids, also are important to pulp and papermaking and can be readily assayed using gas chromatography.

Gas chromatographic analysis of acetone extractives in lodgepole pine and western hemlock TMP furnish