Investigation of antifungal activity of difference parts of cerbera odollam and effect of extracts on some properties of particleboards
| dc.contributor.author | Jia Geng, Boon | |
| dc.date.accessioned | 2015-07-30T05:37:31Z | |
| dc.date.available | 2015-07-30T05:37:31Z | |
| dc.date.issued | 2009 | |
| dc.description.abstract | This research investigated the potential of extracts from leaf, fruit, wood, bark, flower and seed of Pong Pong ( Cerbera odollam) as wood preservatives against fungal and termite. Preliminary evaluation of antifungal properties of n-hexane, ethyl acetate, ethanol and methanol extracts was evaluated via paper disc antifungal assay. Chemical compounds of antifungal active extracts were analysed via gas chromatography mass spectrometer. Termite mortality of methanol extracts was evaluated. The effect of extracts to solid Rubberwood including fungal decay, termite decay, and soil burial were evaluated. The effect of extra..c,t s to particleboard including thickness swelling, internal bond strength, formaldehyde release of particleboard, termite decay, and soil burial were also evaluated. Methanol wood extracts showed the lowest minimum inhibitory amount against Trametes versicolor, Pycnoporus sanguineus, Schizophyllum commune via paper disc antifungal assay. Majority of phenolic compounds and organic acids were detected in the antifungal active extracts. Methanol wood extracts showed the best result in increasing durability of solid Rubberwood against Schizophyllum commune, Trametas versicolor, Pycnoporus sanguineus, Fusarium palustris, Gloeophyllum trabeum, and compatible with commercial preservative against Schizophyllum commune and Gloeophyllum trabeum. Flower methanol extracts showed the best result against Coptotermes gestroi in termite mortality and termite decay. The result of termite decay was compatible with commercial preservatives. Overall, the extracts of Cerbera odollam did not affect the properties of thickness swelling, internal bond and formaldehyde emission of particleboard. According to EN standard, the evaluated urea formaldehyde matrix particleboards and phenol formaldehyde matrix particleboards fulfilled the requirement of 24h thickness swelling for particleboard type P3 and type P4 respectively. The particleboards also fulfilled the requirement of internal bond strength for particleboard type P2, P3 and P4, and the formaldehyde emission of these particleboards were classified as El. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/1061 | |
| dc.language.iso | en | en_US |
| dc.subject | Antifungal activity | en_US |
| dc.subject | Difference parts | en_US |
| dc.subject | Cerbera odollam | en_US |
| dc.subject | Particleboards | en_US |
| dc.title | Investigation of antifungal activity of difference parts of cerbera odollam and effect of extracts on some properties of particleboards | en_US |
| dc.type | Thesis | en_US |
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