1 | Conjugated unsaturation of abietic resin acids can be removed through catalytic hydrogenation to overcome the shortcomings of oxidation and color degradation in rosin. | |
2 | It is not necessary to use natural pure abietic acid and dehydroabietic acid and they are not easily obtained as standard substances. | |
3 | Polymerized rosin is a modified products of gum rosin, contains abietic type acids. | |
4 | Pulp made from softwood ( coniferous ) trees, e. g. fir. pine , spruce. As distinct from Hardwood pulp. | |
5 | Objective: To research the content of Polysaccharopeptide in Collybia albuminosa. |