Objetivo The research proposed has three purpos es: 1-to understand the mechanisms by which tannins protect lignocellulose f rom biodegradation; 2-to determine and characterize the main European source s or materialsplore their possible use was preservatives for wood These thre e objectives are motivated by the foll owing observations: 1-Heartwoods rich in tannins (e.g. oak or chestnut) are naturally durable. The mechanisms by w hich tannins protect lignocellulose ar e unknown even if several hypotheses h ave been proposed. A better understand ing of these mechanisms will allow to make a rational choice among the diffe rent sources of tannins and to modify these tannins in order to obtain an op timum fungicide activity. rich in tannins (10 to 30% of dry matt er). Oak and chestnut woods are curren tly extracted for their tannins, mainl y for leather production. Tannins from oak bark were used on a large scale u p to the beginning of this century. A renewed interest for natural organic c hemicals (and tannins) has emerged aft er oil shortages in the 1970's. Resour ces should thus be reexamined in the l ight of new potential uses of tannins. 3-One of these potential uses is relat ed to (ligno)cellulose preservation. T raditionnally, tannins heve been utili sed as preservatives for fish-nets, ro pes and fabrics. Very good protection of wood has been recently obtained in North-America, by impregnation with ta nnins and Cu (II) salts. Due to their physico-chemical properties (and parti cularly their astringency), tannins ca n be used not only for their fungicide properties but also to fix within the wood or materials derived from it, ot her fungicides or insecticides otherwi se easily leached. Wood adhesives base d on tannins have been used in a few c ountries, but have not been studied so far in relation to durability improve ment of the product. Different tannin extracts, alone or in combination with other fungicides or insecticides, wil l thus be tested for impregnation of w ood and manufacture of particleboard a nd plywood. The properties of the products, includ ing the resistance against rots, blue-stains and termites for woods and agai nst rots for wood panels, will be eval uated. Such a research associating tannins an d wood preservation has not yet been d eveloped in Europe. The gathering of 8 laboratories covering fields such as tannin chemistry, polyphenol microbiol ogy, wood preservation and wood panels making, should lead to the developmen t of new durable and environmentally s afe products based on wood. Ámbito científico agricultural sciencesagriculture, forestry, and fisheriesforestry Programa(s) FP2-FOREST - Specific research and technological development programme (EEC) in the fields of raw materials and recycling - Renewable raw materials: Forestry and wood products (including cork) -, 1990-1992 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador Institut National de la Recherche Agronomique (INRA) Aportación de la UE Sin datos Dirección 147 rue de l'Université 75341 Paris Francia Ver en el mapa Coste total Sin datos Participantes (9) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo CENTRE TECHNIQUE DE L'INDUSTRIE DU BOIS Bélgica Aportación de la UE Sin datos Dirección 830,Allee Hof ter Vleest 1070 BRUXELLES Ver en el mapa Coste total Sin datos Centre Regional de l'Innovation et du Transfert des Technologies pour les Industries du Bois Francia Aportación de la UE Sin datos Dirección Allée des Hêtres 88000 Epinal Ver en el mapa Coste total Sin datos Centre Technique du Bois et de l'Ameublement (CTBA) Francia Aportación de la UE Sin datos Dirección 10 avenue de Saint-Mandé 75012 Paris Ver en el mapa Coste total Sin datos Dr SAGOT Gérard Francia Aportación de la UE Sin datos Dirección 9 rue de Reneville 76400 FECAMP Ver en el mapa Coste total Sin datos ECOLE NORMALE SUPERIEURE Francia Aportación de la UE Sin datos Dirección Rue Lhomond 24 75231 PARIS Ver en el mapa Coste total Sin datos Enterprise Ireland - Trading as Bioresearch Ireland Irlanda Aportación de la UE Sin datos Dirección Ballymun Road - Glasnevin 9 Dublin Ver en el mapa Coste total Sin datos Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria España Aportación de la UE Sin datos Dirección KM.7,Carretera de la Coruña-Apdo. 8.111 28040 Madrid Ver en el mapa Coste total Sin datos Isoroy SA Francia Aportación de la UE Sin datos Dirección 108 route d'Orbec 14102 Lisieux Ver en el mapa Coste total Sin datos SAIREM S.A. Francia Aportación de la UE Sin datos Dirección Porte Du Grand Lyon, 12 01707 NEYRON Ver en el mapa Coste total Sin datos