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.
Some authors attribute the genotoxic effects mainly to resin acids
(abietic and dehydroabietic acid; Fernandez et al.
By contrast, the significant factors for decay in ground proximity, where the test arrangement encourages moisture retention, were the amounts of the hydrophobic extractives palmitic fatty acid and dehydroabietic and neoabietic resin acids
The normal products of wood include tannins, resin acids
Natural resin acids
present in rosin of Pinus spez.
Examples include carrageenan from kelp, biodiesel from vegetable oils, and resin acids
from the "extractives" of trees.
are contaminants known to resist biodegradation both in industrial treatment systems and in receiving waters.
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.
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).
Rosin and Resin Acids
, and Derivatives, Rosin Spirit and Oils, Run Gums: European Union Market Outlook 2010 and Forecast till 2015
Spruce sawdust contained considerably lower amounts of fatty and resin acids
The polar fraction is also analyzed using LRGC and HRGC and the composition of lignans, stilbenes, and oxidized resin acids
can be obtained.