Acid resinic

The resinic “acid” term indicates the terpenic acid not birds present in the resin S of the plants and more particularly in the resin of the pine S.

The resinic acids are present in the resin of pine in the form of Isomère S of carboxylic acids diterpenic of general formula C20H30O2 (molecular mass: 302 g/mol). Their structure derives from the coupling of unit Isoprène which forms the mono ones, sesqui, di and Triterpène S.

The resinic acids are carrying two functional groups, the carboxylic group (COOH) and the double connections. Generally, the resinic acids are arranged in three classes according to the basic skeleton of the molecule, one distinguishes the structures of the type Abiétane, Pimarane, Isopimarane and Labdane.

The principal resinic acids are:

Abietic group ·

  1. Acid abietic
  2. Acid neoabietic
  3. Acid palustric
  4. Acid levopimaric
  5. Acid dehydroabietic
pimaric Group
  1. Acid pimaric
  2. Acid isopimaric
  3. Acid sandaracopimaric

Role and presence in the plants

The resinic acids are secondary metabolites of the plants, i.e. in fact substances are not basically vital for the plants but which are manufactured by the latter to protect themselves and fight against the external aggressions like the Insecte S, the Champignon S, wounds. In the case of the pines, the resinic acids are contained in the resin or Oléorésine and can be recovered for example by distillation of the resin recovered by Gemmage to form the Colophane.

The resin contains in general a mixture of resinic acids whose nature and proportions vary according to the species and the geographical source.

Random links:Black salamander | Karen Grassle | Sega Model 2 | Elena Karpova | Barracuda (film, 1997) | Fleuves_de_la_Nouvelle-Galles_du_Sud