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CONTRIBUTIONS FOR CELLULOSE`S INDUSTRY VEGETABLES WASTES RECOVERY ON PHARMACEUTICAL AND FOOD PRODUCTION INDUSTRIES. ESTIMATION OF POLYMERIC AND AROMATIC COMPOSITION OF SOME FORESTRY AND PULPING WASTES-WOOD AND BARK DUSTS, ESPECIALLY WITH GUAIACYL AND SYRI


CULEA CÄ‚TÄ‚LINA, NEDEFF VALENTIN, CIOBANU DOMNICA
UNIVERSITY OF BACÄ‚U

Issue:

MOCM, Number 9, Volume I

Section:

Issue No. 9 - Volume I (2003)

Abstract:

This study goal was to estimate the potential of some forestry and pulping wastes-wood and bark dusts to liberate aromatic by products. The use of different chemical characterization methods specific for lignocelluloses has allowed an estimation of polymeric and aromatic composition of studied materials, especially with the determination of lignins contents (ADL and KLASON), with guaiacyl and syringyl monomers from uncondensed lignins quantified by thioacidolysis. The distributions of monomers have been proved to be a function of the starting materials type: dicotyledonous angiosperms and gymnosperms, excepting pine bark, present the highest potential precursors quantities (280-380 µmol/g). Pine bark seems to be very different comparing by monomer distribution with the wood; it contains mostly guaiacyl monomers and a little fraction of p-hydroxyphenylpropan (< 25%).

Keywords:

guaiacylpropan, syringylpropan, p-hydroxiphenylpropan, Thioacidolyse.

Code [ID]:

MOCM200309V01S01A0048 [0000952]


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