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Royer, M.; Herbette, G.; Eparvier, V.; Beauchêne, J.; Thibaut, B.; Stien, D. |
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Title |
Secondary metabolites of Bagassa guianensis Aubl. wood, a contribution to the understanding of the natural durability and to the chemotaxonomy of the Moraceae family with an unexplored genus |
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Conference Article |
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2010 |
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Planta Medica |
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Planta Med. |
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76 |
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12 |
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1375 |
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In effort to explain wood durability of Moraceae plants family, a phytochemical study was undertaken on Bagassa guianensis. The phytochemical investigation of the ethyl acetate extract obtained from the heartwood led to the isolation of 18 secondary metabolites, including 6 moracins [the new 6-O-methyl-moracin M (3), 6-O-methyl -moracin N (4) and moracin Z (5); the known moracin M (1), moracin N (2) and moracin P (6)], 8 phenolic derivatives [the new (-)-epialboctalol (12), arachidin 4 (10) and the known alboctalol (11), trans-resveratrol (7), arachidin 2 (9), trans-oxyresveratrol (8) and artogomezianol (13)], the 3 known flavonoids steppogenin (14), katuranin (15), dihydromorin (16), the β-sitosterol (17) and the resorcinol (18). Comparison with literature data indicates that stilbenoids are presumably responsible for the natural resistance of the wood against fungi degradation. In addition, chemical composition points out that B. guianensis is closely related to Morus sp. in the phylogeny and should be placed within the Moreae s. s. tribe in the Moraceae family, accordingly to the latest Weiblen genoma-based classifications [1,2]. |
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58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research, Berlin, Germany, 29th August - 2nd September 2010 |
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EcoFoG @ webmaster @ |
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182 |
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Basset, C.; Stien, D.; Espindola, S.L. |
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Research of antifungal compounds from the Amazonian biomass by a bio-inspired approach |
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2010 |
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Planta Medica |
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Planta Med. |
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76 |
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12 |
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1172 |
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Our research aims at understanding the chemical resistance mechanisms of durable woods against fungi. Our ultimate goal is to isolate and identify antifungal compounds from these woods that could be used for the treatment of human fungal diseases. We therefore screened highly durable Amazonian wood selected from technical databases [1] and demonstrated that bioactive secondary metabolites responsible of the natural durability of the woods [2] can also be used to treat mycoses. This screening has given a very high ... |
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Basset, C.] UAG, UMR ECOFOG, Cayenne 97337, French Guiana |
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0032-0943 |
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58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research, Berlin, Germany, 29th August - 2nd September 2010 |
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ISI:000282066500035 |
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EcoFoG @ webmaster @ |
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183 |
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Plomion, C.; Scotti, I.; Delzon, S.; Gion, J.-M. |
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Adaptation of forest trees to climate change |
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Conference Article |
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2011 |
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BMC Proceedings: IUFRO Tree Biotechnology Conference 2011: From Genomes to Integration and Delivery |
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BMC Proceedings |
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5 |
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I13 |
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1753-6561 |
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IUFRO Tree Biotechnology Conference 2011: From Genomes to Integration and Delivery. Arraial d’Ajuda, Bahia, Brazil. 26 June - 2 July 2011 |
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EcoFoG @ webmaster @ 1238 |
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185 |
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Djenontin, S.T.; Amusant, N.; Ducrot, P.H.; Sohounhloue, D.C.K.; Pioch, D. |
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First report on the termiticidal activity of extracts of Annona squamosa (Annonaceae) seeds and on its active constituent squamocins |
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2012 |
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2012 IUFRO Conference proceedings |
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Division 5 Forest products |
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138-139 |
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Termites inflict severe damage on wood and impede usage of several forest species. The biological metabolites could potentially replace synthetic termiticidal products which are becoming more restricted to use. Annona squamosa is well known for its edible fruits – tropical custard apple. Annonaceous tetrahydrofuran acetogenins have attracted much interest due to their broad range of biological activities, and seeds containing them are reported to show insecticidal and abortifacient properties.
Under the course our exploratory investigation of non food valuable products from less known forest species (here from Benin), the fractions obtained from defatted cake of Annona squamosa seeds with solvents covering a broad range of polarity, revealed a significant termiticidal activity, when applied at 5 – 10 mg/cm² (non-polar solvent) and 1.2 – 5 mg/cm² (case of a more polar solvent).
Based on the result (0: no attack) from the standard procedure EN 118, these extracts could be used for preserving wood under class of use number 1. A derivatization step with Kedde reagents A and B, elemental analysis C,H,O, HPLC/MS and proton NMR showed the presence of squamocin type acetogenins (MW 594 and 622 g/mole: C35H62O7 and C37H66O7) as main components of the most active fraction (100% mortality within 7 days for a sample applied at 2 mg/cm²).
Additional work will be undertaken to confirm the structure of most active compounds in the extracts, and to check whether some Annona squamosa seed extracts (non timber products of sustainable management of native forest) could show even higher activity to protect wood under more adverse conditions and be alternative active natural products to synthetic compounds. |
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Lisbonne, Portugal |
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8-13 juillet 2012 |
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EcoFoG @ webmaster @ |
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186 |
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Thibaut, B.; Beauchêne, J. |
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Links between wood machining phenomena and wood mechanical properties: The case of 0°/90° orthogonal cutting of green wood |
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2004 |
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Proceedings of the 2nd International Symposium on Wood Machining |
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149-160 |
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Vienna |
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EcoFoG @ webmaster @ 1239 |
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188 |
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Niamké, F.; Kokutse, A.D.; Kadio, A.A.; Lemenager, N.; Baudasse, C.; Nourissier-Mountou, S.; Adima, A.A.; Amusant, N.; Chaix G. |
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Title |
Nirs Tools for Prediction of Main Extractives Compounds of Teak (Tectona grandis L.) Heartwood |
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Conference Article |
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2012 |
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2012 IUFRO Conference proceedings |
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Division 5 Forest products |
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Biochemical and physiological process which occurred during heartwood formation have consequences on wood properties such as colour, natural durability and some mechanical properties. However, it is very time-consuming to take measurements of extractives contents. Teak has been reported to contain 1-hydroxy-2-methyl-anthraquinone, 2-hydroxy-methyl-anthraquinone, 2-methyl-anthraquinone, lapachol, 1,4-naphthoquinone for the main compounds.
In teak, natural durability is ascribed to extractives. Consequently, it’s possible to estimate natural durability by measurement of extractives indirectly. For the purposes of selection for the production of improved varieties, the number of samples to be measured rapidly exceeds the capacity of a traditional laboratory.
Near-infrared spectroscopy approach, based on spectral data and reference data, is a tool enabling many of the chemical properties of wood to be predicted and the number of laboratory measurements to be reduced exponentially. The issue here is a question of checking the effectiveness of NIRS tool to build models and predict the main extractive compounds of teak wood from Ivory Coast. We try to calibrate these chemical properties with Nirs spectral information measured on grounded wood.
The results show the possible use of NIRS to predict total phenol content and some main extractive compounds of teak heartwood as tectoquinone, 2-hydroxymethylanthraquinone, … Consequently, after verification on other sets of teak samples, which may or may not be included in the prediction model, NIRS can be used to predict extractive compounds accurately for a large number of samples, making it possible to estimate natural durability indirectly and to include these characteristics in the selection criteria for classifying wood and high throughput phenotyping. |
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Lisbonne, Portugal |
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8-13 juillet 2012 |
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EcoFoG @ webmaster @ |
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196 |
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Amusant, N.; Digeon, A.; Houël, E.; Beauchêne J. |
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Title |
Antifungal activity of wood extractives from waste products of steam distillation of Aniba rosaeodora |
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2012 |
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IRG/WP |
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12 |
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10779 |
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Aniba rosaeodora; antifungal; valorization; wood waste; essential oil |
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Aniba rosaeodora, is a slow growing evergreens of the Lauraceae family which are indigenous over a wide range of the Greater Amazon Region (the Guianas and Venezuela, Brazilian Amazon…). The essential oil obtained from the wood has a characteristic aroma and is a long-established ingredient in the more expensive perfumes. Around the olfactive characteristic of the essential oil is due to the presence of levogyre linalol. The steam distilled wood oil is obtained in a yield ranging around 1% and up to 90% of the oil consists of optically active linalol. This work is focused on the valorization of steam distillated sawdust, waste obtained from extraction of essential oil. After steam distillation, the sawdust was extracted by ethyl acetate and methanolic solvents and the antifungal activity was evaluated against basidomycetes fungi. The both extracts were active in vitro against white and brown rot fungi and allowed to propose these extractives as wood preservative agent. |
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Kuala Lumpur, Malaysia |
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5-6 Octobre 2012 |
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EcoFoG @ webmaster @ |
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204 |
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Niamké, F.; Amusant, N.; Lemenager, N.; Chaix, G.; Thévenon, M.-F. ; Baudassé, C. ; Kati-Coulibaly, S.; Amissa Adima, A.; Gossan Ado, I.; Jay-Allemand, C. |
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Decay resistance attributes of teak (Tectona grandis L. f.) wood: comparison of the fungicidal activities of quinones |
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2011 |
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IRG/WP |
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11 |
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10752 |
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Tectona grandis; decay resistance; quinone; heartwood; brown and white rot fungi |
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The implication of quinones in decay resistance of teak wood is controversial. To better understand the role of individual quinone in this property, we studied the correlations between this latter and the content of 2-(hydroxymethyl)anthraquinone, tectoquinone, anthraquinone-2-carboxylic acid, 1,4-naphthoquinone, lapachol and the new compound 4’,5’-dihydroxy-epiisocatalponol found in teak wood. Then, we studied the fungicidal activities of these quinones in comparison to acetone/water extracts from teak heartwood and sapwood and also with the commercial biocide tebuconazole. Broth dilution technique was used to assess the toxicity of these compounds against Trametes versicolor and Poria placenta. Decay resistance was measured according to current standards and individual quinones content were quantified by high performance liquid chromatography. High positive correlations were found between teak decay resistance and the content of 4’,5’-dihydroxy-epiisocatalponol, tectoquinone, 2-(hydroxymethyl)anthraquinone. Whereas no correlation was found with anthraquinone-2-carboxylic acid, lapachol and 1,4-naphthoquinone. Concerning the fungicidal activities of teak wood extractives, acetone/water heartwood extract was toxic against the two fungi while that of acetone/water sapwood was only fungistatic. 1,4-naphthoquinone and 4’,5’-dihydroxy-epiisocatalponol from the naphthoquinones family were fungicide. However, lapachol and all studied anthraquinones (2-(hydroxymethyl)anthraquinone, anthraquinone-2-carboxylic acid and tectoquinone) were fungistatic or not toxic. In the present study, 1,4-naphthoquinone was found the more toxic with a fungicidal activity 1000-times lower than that of the commercial biocide and over 2000-times lower than that of acetone/water heartwood extracts. These results show that decay resistance of teak wood could be mostly due to the content of naphthoquinone, particularly to that of 1,4-naphthoquinone indicating that it could be used as a potential wood preservative for lesser durable species. |
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Queenstown, New Zealand |
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5-8 Décembre 2011 |
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EcoFoG @ webmaster @ |
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205 |
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Amusant, N.; Beauchêne J.; Fournier, M. |
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Intraspecific variability of durability of Wapa courbaril (Eperua grandiflora) against Antrodia sp. and Coriolus versicolor: effect of radial and height position in the stem |
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2004 |
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IRG/WP |
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04 |
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10531 |
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Natural durability; Amazonian wood, variability; basidiomycetes |
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The variation of a lesser-used species, Eperua grandiflora attacked by brown and white rot has been examined. Trees of this specie showed differences in their behaviour against the type of rot used and also showed evidence of intra and inter tree variation. The “tree” effect is very significant concerning natural resistance. In the same way, there is variation of durability observed according to radial and vertical position in the stem. Although the vertical effect is less significant from practises point of view. |
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Ljubljana, Slovenia |
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6 Octobre 2004 |
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EcoFoG @ webmaster @ |
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206 |
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Vidal-Sallé, E.; Aimène, Y.; Boisse, P. |
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Use of a hyperelastic constitutive law for dry woven forming simulations |
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2011 |
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AIP Conference Proceedings |
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AIP Conf. Proc. |
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1353 |
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883-888 |
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Composite; Forming; Hyperelastic; Numerical modelling |
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The increasing use of composite materials in industry implies an increasing use of automatic processes between which LCM processes take a large place. The improvement of such processes needs an extensive use of numerical simulations for all the stages of the process. In particular, it is necessary to know how the dry reinforcement is shaped. This paper presents a hyperelastic constitutive model for textile composite reinforcement at large strain based on an additive potential representative to tension and in-plane shearing. The proposed potential is a function of the right Cauchy Green and structural tensor invariants whose choice corresponds to textile composite reinforcement mechanical behaviour. The model is implemented in a user subroutine of ABAQUS/Explicit. The accuracy of the model has been checked and some simulations are performed on deep drawing with hemispheric punch. A good agreement is obtained with experimental forming experiments. © 2011 American Institute of Physics. |
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Université des Antilles et de la Guyane, Cayenne 97300, France |
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Belfast, United Kingdom |
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0094243x (Issn) |
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EsaForm 2011, 27–29 Avril 2011 |
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Export Date: 4 September 2013; Source: Scopus; doi: 10.1063/1.3589627; Language of Original Document: English; Correspondence Address: Laboratoire de Mécanique des Contacts et des Structures, UMR CNRS 52 59, Université de LyonFrance |
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208 |
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