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| Author | Royer, M.; Herbette, G.; Eparvier, V.; Beauchene, J.; Thibaut, B.; Stien, D. | ||||
| Title | Secondary metabolites of Bagassa guianensis Aubl. wood: A study of the chemotaxonomy of the Moraceae family | Type | Journal Article | ||
| Year | 2010 | Publication | Phytochemistry | Abbreviated Journal | Phytochemistry |
Volume  |
71 | Issue | 14-15 | Pages | 1708-1713 |
| Keywords | Bagassa guianensis; Moraceae; Secondary metabolites; Stilbenes; Moracins; Flavonoids; Natural durability | ||||
| Abstract | In order to explain the durability of the Moraceae plant family, phytochemistry of Bagassa guianensis was performed. Ethyl acetate extract was obtained from the heartwood and 18 secondary metabolites were isolated, including 6 moracins [6-O-methyl-moracin M, 6-O-methyl-moracin N and moracin Z; previously identified: moracin M, moracin N and moracin P], 8 stilbenoids [presently identified: (-)-epialboctalol and arachidin 4; previously identified: alboctalol, trans-resveratrol, arachidin 2, trans-oxyresveratrol and artogomezianol], 3 previously identified flavonoids, steppogenin, katuranin and dihydromorin, beta-sitosterol and resorcinol. Previous studies suggest that stilbenoids are responsible for the natural durability of wood. Our study has determined that B. guianensis is closely related to Morus sp. in phylogeny and should be included in the Moreae sensu stricto tribe of the Moraceae family. (C) 2010 Elsevier Ltd. All rights reserved. | ||||
| Address | [Royer, Mariana; Eparvier, Veronique; Thibaut, Bernard; Stien, Didier] Univ Antilles Guyane, CNRS, UMR Ecofog, F-97337 Cayenne, France, Email: didier.stien@guyane.cnrs.fr | ||||
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| Publisher | PERGAMON-ELSEVIER SCIENCE LTD | Place of Publication | Editor | ||
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| ISSN | 0031-9422 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000282453900013 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 30 | ||
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| Author | Marti, G.; Eparvier, V.; Moretti, C.; Prado, S.; Grellier, P.; Hue, N.; Thoison, O.; Delpech, B.; Gueritte, F.; Litaudon, M. | ||||
| Title | Antiplasmodial benzophenone derivatives from the root barks of Symphonia globulifera (Clusiaceae) | Type | Journal Article | ||
| Year | 2010 | Publication | Phytochemistry | Abbreviated Journal | Phytochemistry |
| Volume |
71 | Issue | 8-9 | Pages | 964-974 |
| Keywords | Symphonia globulifera; Clusiaceae; Benzophenone; Symphonone; Antiplasmodial; LC/ESI-MS | ||||
| Abstract | In an effort to find antimalarial drugs, a systematic in vitro evaluation on a chloroquine-resistant strain of Plasmodium falciparum (FcB1) was undertaken on sixty plant extracts collected in French Guiana. The ethyl acetate extract obtained from the root barks of Symphonia globulifera exhibited a strong antiplasmodial activity (97% at 10 μg/ml). The phytochemical investigation of this extract led to the isolation of nine polycyclic polyprenylated acylphloroglucinol (PPAPs) compounds and two oxidized derivatives. All compounds showed antiplasmodial activity with IC(50)s ranged from 2.1 to 10.1 μM. A LC/ESI-MSn study performed on polyprenylated benzophenones previously isolated from Moronobea coccinea provided a reliable method for their detection in the extract and structural elucidation. (C) 2010 Elsevier Ltd. All rights reserved. | ||||
| Address | [Marti, Guillaume; Hue, Nathalie; Thoison, Odile; Delpech, Bernard; Gueritte, Francoise; Litaudon, Marc] CNRS, Inst Chim Subst Nat, Ctr Rech Gif, F-91198 Gif Sur Yvette, France, Email: marc.litaudon@icsn.cnrs-gif.fr | ||||
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| Publisher | PERGAMON-ELSEVIER SCIENCE LTD | Place of Publication | Editor | ||
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| ISSN | 0031-9422 | ISBN | Medium | ||
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| Notes | ISI:000279077400016 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 284 | ||
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| Author | Bourreau, D.; Aimene, Y.; Beauchene, J.; Thibaut, B. | ||||
| Title | Feasibility of glued laminated timber beams with tropical hardwoods | Type | Journal Article | ||
| Year | 2013 | Publication | European Journal of Wood and Wood Products | Abbreviated Journal | Eur. J. Wood Wood Prod. |
| Volume |
71 | Issue | 5 | Pages | 653-662 |
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| Abstract | A feasibility study of glulam was carried out in French Guiana using local wood species. The aim was to determine gluing parameters affording satisfactory behaviour to manufactured glulam in a tropical climate. Three abundant wood species, with special properties, were selected for the study and resorcinol-phenol-formaldehyde resin was used for bonding. Three industrial parameters were considered: adhesive spread rate, closed assembly time and gluing pressure. Delamination and shearing tests were carried out in accordance with European Standards. The tests revealed the influence of wood properties and manufacturing parameters on joint resistance. In fact, the results showed that specific gravity and the shrinkage coefficient greatly influenced the gluing step. Indeed, wood with a medium specific gravity needed more adhesive and more pressure than wood with a high specific gravity. In addition, planing and lamella thickness were found to affect glue joint resistance. © 2013 Springer-Verlag Berlin Heidelberg. | ||||
| Address | CNRS-LMGC Université de Montpellier2, 34095 Montpellier, France | ||||
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| ISSN | 00183768 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 30 August 2013; Source: Scopus; doi: 10.1007/s00107-013-0721-4; Language of Original Document: English; Correspondence Address: Bourreau, D.; UAG-UMR Ecofog, Pôle Universitaire Guyanais, 97337 Cayenne cedex, French Guiana; email: dbourreau@nancy.inra.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 497 | ||
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| Author | Lefèvre, F.; Boivin, T.; Bontemps, A.; Courbet, F.; Davi, H.; Durand-Gillmann, M.; Fady, B.; Gauzere, J.; Gidoin, C.; Karam, M.-J.; Pichot, C.; Oddou-Muratorio, S.; Pichot, C. | ||||
| Title | Considering evolutionary processes in adaptive forestry | Type | Journal Article | ||
| Year | 2013 | Publication | Annals of Forest Science | Abbreviated Journal | Ann For Sci |
| Volume |
71 | Issue | 7 | Pages | 723-739 |
| Keywords | Adaptation; Climate change; Evolution-oriented forest management; Genetic resources; Silviculture | ||||
| Abstract | Context: Managing forests under climate change requires adaptation. The adaptive capacity of forest tree populations is huge but not limitless. Integrating evolutionary considerations into adaptive forestry practice will enhance the capacity of managed forests to respond to climate-driven changes.
Aims: Focusing on natural regeneration systems, we propose a general framework that can be used in various and complex local situations by forest managers, in combination with their own expertise, to integrate evolutionary considerations into decision making for the emergence of an evolution-oriented forestry. Methods: We develop a simple process-based analytical grid, using few processes and parameters, to analyse the impact of forestry practice on the evolution and evolvability of tree populations. Results: We review qualitative and, whenever possible, quantitative expectations on the intensity of evolutionary drivers in forest trees. Then, we review the effects of actual and potential forestry practice on the evolutionary processes. We illustrate the complexity of interactions in two study cases: the evolutionary consequences for forest trees of biotic interactions and of highly heterogeneous environment. Conclusion: Evolution-oriented forestry may contribute adapting forests to climate change. It requires combining short-term and long-term objectives. We propose future lines of research and experimentation. |
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| Address | INRA, UR629 Ecologie des Forêts Méditerranéennes, URFM, Domaine Saint Paul, Site AgroparcAvignon Cedex 9, France | ||||
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| Notes | Cited By :2; Export Date: 13 January 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 580 | ||
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| Author | Michalet, S.; Rohr, J.; Warshan, D.; Bardon, C.; Roggy, J.-C.; Domenach, A.-M.; Czarnes, S.; Pommier, T.; Combourieu, B.; Guillaumaud, N.; Bellvert, F.; Comte, G.; Poly, F. | ||||
| Title | Phytochemical analysis of mature tree root exudates in situ and their role in shaping soil microbial communities in relation to tree N-acquisition strategy | Type | Journal Article | ||
| Year | 2013 | Publication | Plant Physiology and Biochemistry | Abbreviated Journal | Plant Physiol. Biochem. |
| Volume |
72 | Issue | Pages | 169-177 | |
| Keywords | Chemical ecology; Denitrification; Eperua falcata; Metabolic profiling; Mycorrhizae; Plant-microbes interactions; Root exudates | ||||
| Abstract | Eperua falcata (Aublet), a late-successional species in tropical rainforest and one of the most abundant tree in French Guiana, has developed an original strategy concerning N-acquisition by largely preferring nitrate, rather than ammonium (H. Schimann, S. Ponton, S. Hättenschwiler, B. Ferry, R. Lensi, A.M. Domenach, J.C. Roggy, Differing nitrogen use strategies of two tropical rainforest tree species in French Guiana: evidence from 15N natural abundance and microbial activities, Soil Biol. Biochem. 40 (2008) 487-494). Given the preference of this species for nitrate, we hypothesized that root exudates would promote nitrate availability by (a) enhancing nitrate production by stimulating ammonium oxidation or (b) minimizing nitrate losses by inhibiting denitrification.Root exudates were collected in situ in monospecific planted plots. The phytochemical analysis of these exudates and of several of their corresponding root extracts was achieved using UHPLC/DAD/ESI-QTOF and allowed the identification of diverse secondary metabolites belonging to the flavonoid family.Our results show that (i) the distinct exudation patterns observed are related to distinct root morphologies, and this was associated with a shift in the root flavonoid content, (ii) a root extract representative of the diverse compounds detected in roots showed a significant and selective metabolic inhibition of isolated denitrifiers invitro, and (iii) in soil plots the abundance of nirK-type denitrifiers was negatively affected in rhizosphere soil compared to bulk. Altogether this led us to formulate hypothesis concerning the ecological role of the identified compounds in relation to N-acquisition strategy of this species. © 2013 Elsevier Masson SAS. | ||||
| Address | SOLICAZ, c/o Guyane Technopole 16 bis rue du 14 Juillet, 97300 Cayenne, French Guiana | ||||
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| ISSN | 09819428 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 15 November 2013; Source: Scopus; Coden: Ppbie; doi: 10.1016/j.plaphy.2013.05.003; Language of Original Document: English; Correspondence Address: Michalet, S.; Université Lyon1, CNRS, UMR5557, INRA, USC1364, Ecologie Microbienne, Centre d'Etude des Substances Naturelles, Pavillon Nétien, ISPB, 8 Avenue Rockefeller, 69373 Lyon cedex, France; email: sergemichalet@yahoo.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 509 | ||
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| Author | Leclerc, T.; Vimal, R.; Troispoux, V.; Périgon, S.; Scotti, I. | ||||
| Title | Life after disturbance (I): changes in the spatial genetic structure of Jacaranda copaia (Aubl.) D. Don (Bignonianceae) after logging in an intensively studied plot in French Guiana | Type | Journal Article | ||
| Year | 2015 | Publication | Annals of Forest Science | Abbreviated Journal | Annals of Forest Science |
| Volume |
72 | Issue | 5 | Pages | 509-516 |
| Keywords | Amazon; Bayesian clustering; Demogenetics; Guiana shield; Parentage analysis; Regeneration; Spatial genetic structure; Tropical rainforest | ||||
| Abstract | Key message: Forest disturbance affects the within-population distribution of genetic diversity, but not its overall levels, in a tropical pioneer tree species. In particular, clumps of related saplings with impoverished diversity are found in canopy gaps but not under forest cover. Context: Forest disturbances can have long-term consequences on the genetic structure of tree populations, because they can alter the demographic properties of the regeneration process and favour some subpopulations/genotypes, both by stochastic processes and by selection. Intermediate disturbances tend to favour species diversity, at least in highly diverse communities, but their effect on intra-specific diversity is unknown. Aims: In this study, we have looked at the genetic consequences of forest disturbance in a stand of the long-lived Neotropical pioneer species, Jacaranda copaia. Methods: The study site was experimentally logged in 1984, and the canopy gaps generated by the logging were mapped. Seedlings of J. copaia colonised the gaps, as expected, at a higher density than in the surrounding forest. In 2006, we exhaustively sampled all saplings and adult trees available in a 25-ha area. The samples were genotyped at nine microsatellite loci, and the distribution of genetic diversity was inspected by analyses of spatial autocorrelation, automated Bayesian assignment and comparisons of diversity between cohorts by bootstrap (RaBoT). Results: Spatial autocorrelation was found to extend farther in post-disturbance saplings than in the undisturbed population (100 m and beyond versus less than 50 m), and divergent clumps (F<inf>ST</inf> = 0.05) of related genotypes were found; genetic diversity was found to be impoverished in each clump relative to the global population at about half of the loci. Conclusion: Overall, our results suggest that forest disturbance has changed the patterns of distribution of genetic diversity, with potential consequences on long-term population viability. © 2015, INRA and Springer-Verlag France. | ||||
| Address | INRA, URFM « Ecologie des Forêts Méditerranéennes », Domaine de Saint-Paul, Avignon, France | ||||
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| Notes | Export Date: 16 July 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 611 | ||
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| Author | Scotti, I.; Montaigne, W.; Cseke, K.; Traissac, S. | ||||
| Title | Life after disturbance (II): the intermediate disturbance hypothesis explains genetic variation in forest gaps dominated by Virola michelii Heckel (Myristicaceae) | Type | Journal Article | ||
| Year | 2015 | Publication | Annals of Forest Science | Abbreviated Journal | Annals of Forest Science |
| Volume |
72 | Issue | 8 | Pages | 1035-1042 |
| Keywords | Amazon; Bayesian clustering; Demogenetics; Guiana shield; Parentage analysis; Regeneration; Spatial genetic structure; Tropical rainforest | ||||
| Abstract | Key message: Genetic diversity appears to be unaffected by disturbance in a stand of the light-demanding Neotropical treeV. michelii. Although spatial genetic structure is modified in post-disturbance cohorts, mixing of seeds from different mother trees in canopy gaps appears to efficiently maintain genetic admixture. Context: The interplay between genetic and demographic processes has major consequences on population viability. Population size affects demographic trends, while genetic diversity insures viability by reducing risks of inbreeding depression and by maintaining adaptive potential. Yet, the consequences of increases in census size (as opposed to effective size) on genetic diversity of forest populations are poorly known. Aims: We have studied the structure of genetic diversity in populations of saplings of the light-responsive tree, Virola michelii (Myristicaceae, the nutmeg family), in two plots having undergone different levels of canopy-gap opening disturbance. This allowed us to test the “intermediate disturbance” hypothesis, which generally applies to species diversity, at the intra-specific scale. Methods: Levels and distribution of genetic diversity were compared between plots and between life stages. Sapling parentage was analysed to infer each adult tree’s contribution to regeneration. Results: Genetic diversity was higher, and spatial genetic structure was stronger in the post-disturbance than in the control seedling population. Parentage analysis suggested that a limited number of parents contributed to most of the regeneration, but that efficient mixing of their progeny may have enhanced the diversity of saplings occupying canopy gaps. Conclusion: A mixture of demo-genetic processes may contribute to maintain genetic diversity in spite of, or possibly due to, ecosystem disturbance in V. michelii. © 2015, INRA and Springer-Verlag France. | ||||
| Address | Solicaz, Guyane Technopôle, 16 bis Rue du 14 Juillet, Cayenne, French Guiana | ||||
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| Notes | Export Date: 14 December 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 642 | ||
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| Author | Levionnois, Sébastien ; Salmon, Camille ; Alméras, Tancrède ; Clair, Bruno ; Ziegler, Camille ; Coste, Sabrina ; Stahl, Clement ; Gonzalez-Melo, Andrés ; Heinz, Christine ; Heuret, Patrick | ||||
| Title | Anatomies, vascular architectures, and mechanics underlying the leaf size-stem size spectrum in 42 Neotropical tree species | Type | Journal Article | ||
| Year | 2021 | Publication | Journal of Experimental Botany | Abbreviated Journal | |
| Volume |
72 | Issue | 22 | Pages | 7957–7969 |
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| Abstract | The leaf size-stem size spectrum is one of the main dimensions of plant ecological strategies. Yet the anatomical, mechanical, and hydraulic implications of small vs. large shoots are still poorly understood. We investigated 42 tropical rainforest tree species in French Guiana, with a wide range of leaf areas at the shoot level. We quantified the scaling of hydraulic and mechanical constraints with shoot size estimated as the water potential difference ΔΨ and the bending angle ΔΦ, respectively. We investigated how anatomical tissue area, flexural stiffness and xylem vascular architecture affect such scaling by deviating (or not) from theoretical isometry with shoot size variation. Vessel diameter and conductive path length were found to be allometrically related to shoot size, thereby explaining the independence between ΔΨ and shoot size. Leaf mass per area, stem length, and the modulus of elasticity were allometrically related with shoot size, explaining the independence between ΔΦ and shoot size. Our study also shows that the maintenance of both water supply and mechanical stability across the shoot size range are not in conflict. | ||||
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| Publisher | Oxford University Press | Place of Publication | Editor | ||
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| Call Number | EcoFoG @ webmaster @ | Serial | 1050 | ||
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| Author | Rodrigues, A.M.S.; Theodoro, P.N.E.T.; Eparvier, V.; Basset, C.; Silva, M.R.R.; Beauchene, J.; Espindola, L.S.; Stien, D. | ||||
| Title | Search for Antifungal Compounds from the Wood of Durable Tropical Trees | Type | Journal Article | ||
| Year | 2010 | Publication | Journal of Natural Products | Abbreviated Journal | J. Nat. Prod. |
| Volume |
73 | Issue | 10 | Pages | 1706-1707 |
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| Abstract | Research on antifungal compounds from the durable wood from French Guiana Amazonian forest trees highlights the correlation between the activity of their extracts against wood-rotting fungi and human pathogens. The fractionation of an ethyl acetate extract of Sextonia rubra wood led to the isolation of rubrenolide (1) and rubrynolide (2). The potential of compounds 1 and 2 is described through the evaluation of their activity against 16 pathogenic fungi and their cytotoxicity toward NIH-3T3 mammalian fibroblast cells. | ||||
| Address | [Rodrigues, Alice M. S.; Eparvier, Veronique; Basset, Charlie; Espindola, Laila S.; Stien, Didier] Univ Antilles Guyane, CNRS, UMR ECOFOG, F-97300 Cayenne, France, Email: darvenne@unb.br | ||||
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| Publisher | AMER CHEMICAL SOC | Place of Publication | Editor | ||
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| ISSN | 0163-3864 | ISBN | Medium | ||
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| Notes | ISI:000283288900015 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 25 | ||
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| Author | Freycon, V.; Krencker, M.; Schwartz, D.; Nasi, R.; Bonal, D. | ||||
| Title | The impact of climate changes during the Holocene on vegetation in northern French Guiana | Type | Journal Article | ||
| Year | 2010 | Publication | Quaternary Research | Abbreviated Journal | Quat. Res. |
| Volume |
73 | Issue | 2 | Pages | 220-225 |
| Keywords | Holocene; Vegetation change; French Guiana; Carbon isotope composition; Soil organic matter | ||||
| Abstract | The impact of climatic changes that occurred during the last glacial maximum and the Holocene on vegetation changes in the Amazon Basin and the Guiana Shield are still widely debated. The aim of our study was to investigate whether major changes in vegetation (i.e. transitions between rainforests and C-4 savannas) occurred in northern French Guiana during the Holocene. We measured variations in the delta C-13 of soil organic matter at eight sites now occupied by forest or savannah. The forest sites were selected to cover two regions (forest refugia and peneplains) which are thought to have experienced different intensities of disturbance during the latest Pleistocene and the Holocene. We found that none of the forest sites underwent major disturbances during the Holocene, i.e. they were not replaced by C-4 savannahs or C-4 forest savannahs for long periods. Our results thus suggest that tropical rainforests in northern French Guiana were resilient to drier climatic conditions during the Holocene. Nevertheless, geographical and vertical variations in the C-13 of SOM were compatible with minor changes in vegetation, variations in soil processes or in soil physical properties. (C) 2009 University of Washington. Published by Elsevier Inc. All rights reserved. | ||||
| Address | [Freycon, Vincent] CIRAD, UR Dynam Forestiere, F-34398 Montpellier 5, France, Email: vincent.freycon@cirad.fr | ||||
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| Publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE | Place of Publication | Editor | ||
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| ISSN | 0033-5894 | ISBN | Medium | ||
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| Notes | ISI:000275246700007 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 66 | ||
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