Tanning agents, 615 Woods

Rhus coriaria L. is a shrab, which reaches 3M p in high in the wild. Its powdered leaves were used as a tanning agent for its high tannin content [10]. Tannins are found in the leaves, fmit, barks, roots and wood of trees. They can be classified into two groups condensed tannins and hydroly sable tannins [11]. The co-occurrence of both kinds of tannins in the same plant or plant tissue is often observed [12]. The main compounds present mRhus coriaria L. are hydrolysable gallatonnins. 

Properties A wood-derived tannin, the most important tanning agent used in the American leather industry. Combustible. 

The natives use the bark to prepare an intensely colored infusion, to poison their arrows, for medicinal purposes, as an ordeal drug, and in some regions of the Upper Congo as a tanning agent. The wood is very hard, not affected by termites, and finds important uses as structural timber. The hard sternutatory bark is richer in alkaloids than the other parts of the plant, all of which contain some alkaloids. 

Resource and manufacturing processes affect the chemical composition and reactivity as well as the geometry of the fibres in plant fibres. Lignin, reactive substances like tannins, resins and tanning agents as well as reactive wood polyoses or smooth surfaces of the elements significantly influence the quality of the bonding and, hence, the later product properties. Furthermore, particle size and slenderness ratio play a role. 

Alloying agents in the manufacture of transistors, lasers, and semiconductors processing of glass, pigments, textiles, paper, metal adhesives, wood preservatives and ammunition hide tanning process pesticides feed additives pharmaceuticals 111, 12, 23,3121, 32, 341,3512, 3521,3522, 362, 372, 38... 

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