Siècle(s) traité(s) : 17
Droits : Domaine public
Provenance : Archives territoriales de Guyane
Permalien : http://www.manioc.org/patrimon/GAD11008
GAD11008

Éditeur(s) : Paris : Librairie Larousse
Siècle(s) traité(s) : 19
Droits : Domaine public
Provenance : Communauté d'agglomération de La Rochelle. Médiathèque Michel-Crépeau
Permalien : http://www.manioc.org/patrimon/MMC16023-2
MMC16023-2

Éditeur(s) : Paris : A. Challamel
Siècle(s) traité(s) : 20
Droits : Domaine public
Provenance : Ville de Pointe-à-Pitre. Réseau des bibliothèques
Permalien : http://www.manioc.org/patrimon/PAP11119
PAP11119

Éditeur(s) : HAL CCSD IOP Publishing
Résumé : We present the results of an inter-laboratory comparison of EPMA analysis at low voltage (5-6 kV) of three monophasic alloy steel samples. The aim of the work was to obtain an estimate of the present situation of low-voltage analysis of steel and identify needs for improvement. EPMA analyses of the samples were conducted by seven participant groups using electron microprobes and scanning electron microscopes of different kind, equipped with wavelength- and/or energy-dispersive X-ray spectrometers, and employing their own methodology of analysis. The results using WDS showed essentially an underestimation of the Cr contents, with relative deviations from the reference values ranging from -0.7 % to -17 %, and an overestimation of Fe and Ni, with relative deviations from the reference composition ranging from -4 % to +30 %, and from +14 % to +42 %, respectively. The relative deviations obtained by using EDS showed larger scatter, ranging from -16 % to +54 % for Cr, -0.4 % to +66 % for Fe and from +13 % to +90 % for Ni. Reasons for the differences observed and the scatter of results are discussed.
ISSN: 1757-8981

hal-00813999
https://hal.archives-ouvertes.fr/hal-00813999
DOI : 10.1088/1757-899X/32/1/012014

Éditeur(s) : HAL CCSD Wiley
Résumé : International audience
Mycoheterotrophic orchids have adapted to shaded forest understory by shifting to achlorophylly and receiving carbon from their mycorrhizal fungi. In temperate forests, they associate in a highly specific way with fungi forming ectomycorrhizas on nearby trees, and exploiting tree photosynthates. However, many rainforests lack ectomycorrhizal fungi, and there is evidence that some tropical Asiatic species associate with saprotrophic fungi. To investigate this in different geographic and phylogenetic contexts, we identified the mycorrhizal fungi supporting two tropical mycoheterotrophic orchids from Mascarene (Indian Ocean) and Caribbean islands. We tested their possible carbon sources by measuring natural nitrogen (15N) and carbon (13C) abundances. Saprotrophic basidiomycetes were found: Gastrodia similis associates with a wood-decaying Resinicium (Hymenochaetales); Wullschlaegelia aphylla associates with both litter-decaying Gymnopus and Mycena species, whose rhizomorphs link orchid roots to leaf litter. The 15N and 13C abundances make plausible food chains from dead wood to G. similis and from dead leaves to W. aphylla. We propose that temperature and moisture in rainforests, but not in most temperate forests, may favour sufficient saprotrophic activity to support development of mycoheterotrophs. By enlarging the spectrum of mycorrhizal fungi and the level of specificity in mycoheterotrophic orchids, this study provides new insights on orchid and mycorrhizal biology in the tropics. New Phytologist (2009)doi: 10.1111/j.1469-8137.2009.02987.x
ISSN: 0028-646X

hal-01199356
http://hal.univ-reunion.fr/hal-01199356
DOI : 10.1111/j.1469-8137.2009.02987.x

Extrait de : L'illustration, n°669, p. 415-416
Résumé : Article 1 p., 1 gravure
Siècle(s) traité(s) : 19
Droits : Domaine public
Provenance : ORkidé|Fonds privé Pierre Rostan
Permalien : http://www.manioc.org/patrimon/ORK12172
ORK12172

Éditeur(s) : Paris : Ernest Leroux
Résumé : Ouvrage couronné par l'Académie Française
Siècle(s) traité(s) : 18
Droits : Domaine public
Provenance : Archives territoriales de Guyane
Permalien : http://www.manioc.org/patrimon/GAD12010
GAD12010

Éditeur(s) : Paris : Alcan-Lévy
Résumé : Illustré
Siècle(s) traité(s) : 18
Provenance : Ville de Bordeaux. Bibliothèque municipale
Permalien : http://www.manioc.org/patrimon/BBX19050
BBX19050

Éditeur(s) : Paris : F. Buisson
Siècle(s) traité(s) : 19
Provenance : Archives départementales de Guadeloupe
Permalien : http://www.manioc.org/patrimon/ADG18228
ADG18228

Éditeur(s) : Paris : Didier et Cie
Siècle(s) traité(s) : 18
Droits : Domaine public
Provenance : Collectivité territoriale de Martinique. Bibliothèque Schoelcher
Permalien : http://www.manioc.org/patrimon/SCH13237
SCH13237

Éditeur(s) : Paris : Typographie Lahure
Siècle(s) traité(s) : 1
Droits : Domaine public
Provenance : Université Toulouse 1 Capitole. Service Commun de la Documentation
Permalien : http://www.manioc.org/patrimon/TLS17007
TLS17007