Výsledky vyhledávání - "Bernard Guillet"

Monitoring organic matter dynamics in soil profiles by ‘Rock-Eval pyrolysis’: bulk characterization and quantification of degradation

Autor: Jean-Robert Disnar, C. Di Giovanni, Eric P. Verrecchia, Bernard Guillet, David Sebag, Alain Durand

Publikováno v: European Journal of Soil Science. 57:344-355

Summary Rock-Eval pyrolysis was designed for petroleum exploration to determine the type and quality of organic matter in rock samples. Nevertheless, this technique can be used for bulk characterization of the immature organic matter in soil samples

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0368859cf185dbda677daace655b6889
https://doi.org/10.1111/j.1365-2389.2005.00745.x

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Nature and genesis of spodic horizons characterized by inverted color and organic content in a subalpine podzolic soil (Pyrenees Mountains, France)

Autor: Jean-Marc Belet, Mireille Remaury, François Martin, Bernard Dupré, Thierry Gauquelin, Joseph Dagnac, Bernard Guillet, Priscia Oliva, Francois Toutain

Publikováno v: Bulletin de la Société Géologique de France. 173:77-86

Podzolic soils showing an inverted sequence between Bh and Bs horizons have been recently described in the French Pyrenees. This paper deals with the spodic characters of two inverted podzol profiles found in the granitic Estibère valley. Taking in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea45d1b391ad9aca30fd9671c6f87c98
https://doi.org/10.2113/173.1.77

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Agreement between floristic and soil organic carbon isotope (13C/12C, 14C) indicators of forest invasion of savannas during the last century in Cameroon

Autor: Véronique Kamgang Kabeyene Beyala, Joseph Youta Happi, Dominique Schwartz, André Mariotti, Jacques Bonvallot, B. Riera, Gaston Achoundong, Bernard Guillet

Publikováno v: Journal of Tropical Ecology
Journal of Tropical Ecology, Cambridge University Press (CUP), 2001, 17, pp.809-832
Journal of Tropical Ecology, 2001, 17, pp.809-832. ⟨10.1017/S0266467401001614⟩
Journal of Tropical Ecology, Cambridge University Press (CUP), 2001, 17, pp.809-832. ⟨10.1017/S0266467401001614⟩
Journal of Tropical Ecology, 2001, 17, pp.809-832
HAL

In an area of savanna-forest (S-F) mosaic of Cameroon, at Kandara near Bertoua, an enclosed savanna bordered by young semi-deciduous forests was selected for detailed studies of vegetation and soil carbon isotope compositions with a view to estimatin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::839a8045e8e10d0464dbef2938fbdfb3
https://doi.org/10.1017/s0266467401001614

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n -Alkanes and free fatty acids in humus and A1 horizons of soils under beech, spruce and grass in the Massif-Central (Mont-Lozère), France

Autor: F Marseille, Yves Noack, Jean-Robert Disnar, Bernard Guillet

Publikováno v: European Journal of Soil Science. 50:433-441

Soil profiles under beech, spruce and a grassland have been analysed to study the evolution of natural n-alkanes in pollution-free ecosystems. The soils had all developed on granitic bedrock, at an altitude of 1300-1500 m in the region of Mont-Lozere

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::34c64b0d37779cccf05da8f94e46348c
https://doi.org/10.1046/j.1365-2389.1999.00243.x

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Le nitrate des ruisseaux, indicateur de l'état sanitaire et des perturbations de l'écosytème forestier. Exemple du Mont Lozère

Autor: François Lelong, Jean-François Didon-Lescot, Bernard Guillet

Publikováno v: Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science. 327:107-113

The water from a coniferous catchment was sampled over a 14-year period, corresponding to different phases of forest status: healthy, then declining, whole-tree-harvested and finally newly afforested. The concentrations of nitrate and basic cations w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::658852eb58d59b3e335e88ccb3a859ec
https://doi.org/10.1016/s1251-8050(98)80040-2

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Separation of phenolic aldehydes, ketones and acids from lignin degradation by capillary zone electrophoresis

Autor: Phillipe Morin, Jean-Robert Disnar, Fabienne Marseille, Ousmane Maman, Bernard Guillet

Publikováno v: Journal of Chromatography A. 755:89-97

Capillary zone electrophoresis (CZE) was investigated for the separation of eleven phenolic aldehydes, ketones and acids which are main components of lignin. The influence of the buffer pH, electrolyte composition, acetonitrile amount, temperature an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29ee010c4cb353976e4bbf9423b118a1
https://doi.org/10.1016/s0021-9673(96)00583-3

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Changes in the amount and distribution of neutral monosaccharides of savanna soils after plantation of Pinus and Eucalyptus in the Congo

Autor: Jean-Robert Disnar, André Mariotti, Bernard Guillet, C. Trouve

Publikováno v: European Journal of Soil Science. 47:51-59

Summary In the Congo, near Pointe-Noire, Pinus and Eucalyptus were planted on the savanna for 30 years. We have characterized the effects of this change on land-use on the composition of carbohydrates in whole soil and particle-size fractions of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59755055ebf3a723b754b851061659d5
https://doi.org/10.1111/j.1365-2389.1996.tb01371.x

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Distribution of sulphur forms in soils from beech and spruce forests of Mont Loz�re (France)

Autor: C. Vannier, J. F. Didon-Lescot, François Lelong, Bernard Guillet

Publikováno v: Plant and Soil. 154:197-209

From a quantitative inventory of sulphur forms and sulphur budget, the relation between the distribution of the various sulphur forms and the sulphate fluxes in three soil profiles has been addressed. These profiles are located in two forested waters

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c7b41c38febd6acc3ef041061f29a77
https://doi.org/10.1007/bf00012525

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Organic fluxes and early diagenesis in the lacustrine environment: the superficial sediments of the Lac du Bouchet (Haute Loire, France)

Autor: Patrick Albéric, Andrew J. Patience, Abdelfettah Sifeddine, Elisabeth Lallier-Vergès, Bernard Guillet

Publikováno v: Organic Matter Accumulation ISBN: 9783540591702

Superficial sediments from the Lac du Bouchet were analysed to study the degradation processes which affect sedimentary organic matter in an oligotrophic lacustrine environment. This was undertaken by the study of the evolution of the organic matter

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fdcc9ce7ac91996e00f02149fa07a33d
https://doi.org/10.1007/bfb0117671

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