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Theses

Caractérisation chimique et application à la préservation du bois des oléorésines d’Aucoumea klaineana (Okoumé), Canarium schweinfurthii (Aiélé), Dacryodes buettneri (Ozigo) et Dacryodes edulis (Safoutier) du Gabon

Abstract : This work evaluates the contribution of the three fractions (RR, PR and EO) of Ak, Cs, Db and De from Gabon to preservation. For that purpose, a chemical analysis by GC/MS of the three fractions was first made, then the study of their antifungal and antitermite activities, and finally the study of their effects in the protection of wood blocks following the attacks of the degradation agents. The results of the chemical analyses show that the HE are made up of monoterpenes and monoterpenoids, whereas the RB and RP are made up of a mixture of monoterpenes, monoterpenoids and triterpenes. Bioassays of the latter against PP, CP, CV and PS show low antifungal activity, but show high antitermite activity. These fractions improve the durability of the wood against fungi by 20%, and a good resistance of the wood blocks against termites. The latter, associated with Tebuconazole, increase the resistance of wood against wood degradation agents. Their leachable characteristics are clearly highlighted.
Document type :
Theses
File URL :
http://docnum.univ-lorraine.fr/ulprive/DDOC_T_2020_0070_BEDOUNGUINDZI.pdf
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https://hal.univ-lorraine.fr/tel-02960261
Contributor : Thèses Ul <>
Submitted on : Wednesday, October 7, 2020 - 3:04:52 PM
Last modification on : Thursday, October 8, 2020 - 3:12:58 AM

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  • HAL Id : tel-02960261, version 1

Citation

Walter Fiacre Bédounguindzi. Caractérisation chimique et application à la préservation du bois des oléorésines d’Aucoumea klaineana (Okoumé), Canarium schweinfurthii (Aiélé), Dacryodes buettneri (Ozigo) et Dacryodes edulis (Safoutier) du Gabon. Chimie. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0070⟩. ⟨tel-02960261⟩

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