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Author |
Bardet, S.; Beauchêne, J.; Gril, J. |
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Title |
Influence of temperature on the transverse behaviour in water-saturated state of tropical wood species |
Type |
Conference Article |
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Year |
2002 |
Publication |
Sustainable utilization of tropical forest resources : proceedings of the fourth international wood science |
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Pages |
51-56 |
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Keywords |
Rheology; Wood; Viscoelasticity; Compression Tests; Temperature; Modelling |
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Abstract |
The influence of temperature on the transverse viscoelastic behaviour of green wood was characterised by the apparent radial modulus (ER) in a quasi-static compression test. The glassy transition temperature of 10 tropical species (basic density between 0.2 and 0.9) varied between 53 and 69°C. The influence of both temperature and strain rate was observed on Bocoa prouacensis (Aubl.). The use of an approximated complex diagram revealed a secondary viscoelastic process occurring in the low temperature range. A multiparabolic model, where each parabolic element was replaced by a generalised Maxwell model with a modified-Gaussian relaxation spectrum, was fitted to the observed behaviour in the time range of 0.01 to 100 sec and temperature of 10 to 90°C. |
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Research Center for Physics |
Place of Publication  |
Serpong, Indonesia |
Editor |
Dwianto, W.; Yusuf, S.; Hermiati, E.; Suryanegara, L. |
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2-5 September 2002 |
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no |
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Call Number |
EcoFoG @ webmaster @ 48 |
Serial |
23 |
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Author |
Leguet, Aurélia |
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Title |
Physiologie et écologie chimique des odeurs florales chez les aracées tropicales |
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Thesis |
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Year |
2012 |
Publication |
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Abbreviated Journal |
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Pages |
33 |
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Abstract |
Les inflorescences des Aracées tropicales émettent des odeurs lorsque les fleurs femelles sont réceptives afin d’attirer leurs pollinisateurs, des scarabées Cyclocephala, qui recherchent un site de nourriture et des partenaires sexuels. Avant leur émission, les composés organiques volatils (COV) qui composent l’odeur florale sont stockés dans des vésicules. La composition de l’odeur de plusieurs espèces d’Aracées présentes en Guyane française ainsi que la cinétique de stockage des terpènes ont été étudiés. Nos résultats révèlent que les vésicules terpéniques sont produites par les étamines et les fleurs stériles dès le début du développement de l’inflorescence et que leur taille augmente jusqu’au moment de l’excrétion de leur contenu. Les deux types de fleurs participent ainsi à l’attraction des pollinisateurs de façon synchrone. Les espèces d’Aracées étudiées se distinguent par la nature et la quantité de COV émis mais aussi par la taille des vésicules produites, elles assurent ainsi la spécificité de la pollinisation. L’odeur florale d’une espèce ne présentant pas de variation interannuelle, elle constitue un signal fiable pour les pollinisateurs de ces plantes et assure ainsi leur fidélité. |
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Thesis |
Master's thesis |
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Publisher |
Université Jean Monnet |
Place of Publication |
Saint Etienne - France |
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Series Editor |
Gibernau, Marc |
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Call Number |
EcoFoG @ webmaster @ |
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309 |
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Author |
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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Title |
Decay resistance attributes of teak (Tectona grandis L. f.) wood: comparison of the fungicidal activities of quinones |
Type |
Conference Article |
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Year |
2011 |
Publication |
IRG/WP |
Abbreviated Journal |
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Volume |
11 |
Issue |
10752 |
Pages |
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Keywords |
Tectona grandis; decay resistance; quinone; heartwood; brown and white rot fungi |
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Abstract |
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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Place of Publication |
Queenstown, New Zealand |
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Conference |
5-8 Décembre 2011 |
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no |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
205 |
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Author |
Amusant, N.; Anouhé, J. B. S.; Amissa, A.; Beauchène, Jacques; Niamké, E.; Nicolinni, E. |
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Title |
Tree crown architecture: a tool for decay resistance evaluation |
Type |
Conference Article |
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Year |
2013 |
Publication |
IRG/WP |
Abbreviated Journal |
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Volume |
13 |
Issue |
10793 |
Pages |
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Keywords |
decay resistance, architecture, heartwood, wood extractives, crown |
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Abstract |
The variability of natural durability contributes to the bad perception of some wood end-users. In our search, we need to adjust our methods and strategies to estimate natural durability and extract higher value from wood resources. Architectural analysis is essentially a detailed, multilevel, comprehensive and dynamic approach to plant development. Numerous biological process which impact some wood properties like durability are linked with tree development. A better understanding of the interelationship between tree physiology through tree achitecture analysis and natural durability could be an approach to predict this property. This study explore the relation between the crown architecture, decay resistance and wood extractives in Dicorynia guianensis in order to propose tree crown architecture as an evalution decay resistance tool. |
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Place of Publication |
Queenstown, New Zealand |
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Conference |
16-20 June 2013 |
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no |
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Call Number |
EcoFoG @ carole.legrand @ |
Serial |
214 |
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Author |
Amusant, N.; Digeon, A. |
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Title |
Potential valorization of wood extractives from waste products of steam distillation of Aniba rosaeodora: antitermitic activity. |
Type |
Conference Article |
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Year |
2013 |
Publication |
IRG/WP |
Abbreviated Journal |
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Volume |
13 |
Issue |
30629 |
Pages |
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Keywords |
Aniba rosaeodora – antitermitic – european standard – screening test. |
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Abstract |
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. The wood is also composed with alkaloid compounds like anibin. These compounds contribute to the protection of the wood against insects and fungi. This work is focused on the valorization of steam distillated sawdust; the sawdust was extracted with methanol in order to study the antitermitic activity of the extract. The methanolic extract shows an efficacy against termites at low concentrations according to the EN 117 standard. |
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Place of Publication |
Queenstown, New Zealand |
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Conference |
16-20 June 2013 |
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no |
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Call Number |
EcoFoG @ carole.legrand @ |
Serial |
215 |
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Author |
Nicolle, Sandra |
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Title |
Sharing and distributing environmental data: study cases in a French and Brazilian Amazonian context |
Type |
Conference Article |
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Year |
2012 |
Publication |
Sharing environmental information;
issues of open environmental data in Latin America |
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Pages |
1-5 |
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Place of Publication |
Porto Alegre, Brésil |
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Conference |
23-24 août 2012 |
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no |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
191 |
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Author |
Stien, Didier; Houël, Emeline |
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Title |
Chimie des substances naturelles en Amazonie guyanaise |
Type |
Book Chapter |
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Year |
2010 |
Publication |
Amazonie, une aventure scientifique et humaine du CNRS |
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Pages |
116-119 |
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Publisher |
Galaade Editions |
Place of Publication |
Péronnas, France |
Editor |
Pavé, A; Fornet, G. |
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no |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
163 |
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Author |
Fréville, Hélène ; Scotti Saintagne, Caroline |
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Title |
Rôle des variations climatiques passées et de la spécialisation écologique dans la distribution des espèces tropicales ; apport des approches génétiques |
Type |
Book Chapter |
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Year |
2010 |
Publication |
Amazonie, une aventure scientifique et humaine du CNRS |
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Pages |
108-111 |
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Publisher |
Galaade Editions |
Place of Publication |
Péronnas, France |
Editor |
Pavé, A ; Fornet, G. |
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no |
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Call Number |
EcoFoG @ carole.legrand @ |
Serial |
169 |
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Author |
Sabatier, D.; Couteron, P.; Elfort, G.; Madelaine, C.; Molino, J.F.; Nicolini, E.A.; Prévost, M.F.; Pélissier, R.; Proisy, C.; Smock, L.; Tarcy, M.; Abner, E.; Baisie, M.; Bonal, D.; Domenach, A.M.; Freycon, V.; Godard, I.; Gond, V.; Goret, J.Y.; Kago, F.; Koese, M.; Kwasie, F. |
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Title |
Evaluation multi-échelles de la diversité spécifique, structurale et fonctionnelle des arbres en forêt guyanaise : prise en compte du substrat géologique, des types de sols et de la dynamique sylvigénétique (DIME) |
Type |
Conference Article |
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Year |
2006 |
Publication |
Ecosystèmes tropicaux : actes du 2ème colloque de restituion du programme de recherche |
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Pages |
125-133 |
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Publisher |
ECOFOR |
Place of Publication |
Paris(France) |
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Conference |
7-8 novembre 2006 |
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EcoFoG @ webmaster @ |
Serial |
141 |
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Author |
Tabarant, P. |
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Title |
Stratégies de croissance en hauteur des jeunes arbres héliophiles en couvert dense tropical – Ajustement du fonctionnement hydraulique et mécanique |
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Thesis |
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Year |
2007 |
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Volume |
Master 2 recherche sciences de l'univers, environn |
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Pages |
62 |
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Master's thesis |
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Publisher |
Université Pierre et Marie Curie |
Place of Publication |
Paris - France |
Editor |
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Series Editor |
Almeras, T. |
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Call Number |
EcoFoG @ webmaster @ 231 |
Serial |
78 |
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