Search Results - "LETOLLE, R."

Major element chemistry of the Huanghe (Yellow River), China - weathering processes and chemical fluxes by Zhang, J., Huang, W.W., Létolle, R., Jusserand, C.

“…The chemistry of major elements (Ca, K, Mg, Na, SiO 2, Cl −, SO 4 −2 and alkalinity etc.) from the Huanghe (Yellow River) is examined with data obtained from…”
Get full text

History of Aral Sea level variability and current scientific debates by Cretaux, Jean-François, Letolle, René, Bergé-Nguyen, Muriel

“…The Aral Sea has shrunk drastically over the past 50years, largely due to water abstraction from the Amu Darya and Syr Darya rivers for land irrigation. Over a…”
Get full text

EXPERIMENTAL DETERMINATION OF NITROGEN KINETIC ISOTOPE FRACTIONATION: SOME PRINCIPLES; ILLUSTRATION FOR THE DENITRIFICATION AND NITRIFICATION PROCESSES by MARIOTTI, A., GERMON, J. C., HUBERT, P., KAISER, P., LETOLLE, R., TARDIEUX, A., TARDIEUX, P.

“…A few principles relative to the presentation and use of nitrogen stable isotopie data are briefly reviewed. Some classical relationships between the isotope…”
Get full text

Salinity of surface waters in the Aral Sea region by Letolle, R, Chesterikoff, A

“…An overview of recent changes in salinity in the surface waters of the Aral sea basin is given. Total dissolved salts (salinity) in most waters are higher than…”
Get full text

History of science: Isotope geochemistry and cosmochemistry by Letolle, R

Get full text

Isotope geochemistry (S, C, O, Sr, Pb) of the Chaudfontaine mineralization (Belgium) by DEJONGHE, L, BOULEGUE, J, DEMAIFFE, D, LETOLLE, R

Get full text

Atmospheric pollution and fallout by PCBS and organochlorine pesticides (Ile-de-France) by CHEVREUIL, M, CHESTERIKOFF, A, LETOLLE, R, GRANIER, L

“…Air pollution and atmospheric deposition by PCBs and organochlorine pesticides were studied at Paris from January 1986 to June 1987. The deposition measured as…”
Get full text

Investigations on Aral Sea Regressions from Mirabilite Deposits and Remote Sensing by Crétaux, Jean-François, Létolle, Rene, Calmant, Stephane

“…Remote sensing techniques including radar (Topex/Poseidon, Jason-1 and Envisat) and laser altimetry (Icesat), and moderate resolution spectro-radiometer…”
Get full text

Oxygen 18 in estuaries by Letolle, R, Martin, J. M

“…Measurements of the oxygen isotope/oxygen ratio are used to study river water mixing in estuaries, with data from experiments in locations ranging from the…”
Get full text

A Gas Chromatographic Separation for the H and C Stable Isotope Ratio Determination of Coal Compounds by Antenucci, Diano, Bouquegneau, Jean-Marie, Brasseur, Alain, Dauby, Patrick, Létolle, René, Jacquemin, Christiane, Pirard, Jean-Paul

“…A new, completely automated gas chromatography technique has been developed to separate the different gaseous compounds produced during underground coal…”
Get full text

Carbon stable isotope analysis as a tool for tracing temperature during the El Tremedal underground coal gasification at great depth by Brasseur, Alain, Antenucci, Diano, Bouquegneau, Jean-Marie, Coëme, Antoinette, Dauby, Patrick, Létolle, René, Mostade, Marc, Pirlot, Pierre, Pirard, Jean-Paul

“…The new opportunity given by the underground gasifier developed at Alcorisa in Spain (Province of Teruel) in the framework of an European experiment has…”
Get full text

Isotope geochemistry and cosmochemistry by LETOLLE, R

Get full text

Observation on the paper by F. Velasco et al.: A contribution to the ore genesis of the magnesite deposit of Eugui, Navarra (Spain): Mineral. deposita 22, 33–41 (1987) Final proof of sparry magnesites colloidal syngenetic origin by Chaye d'Albissin, M., Guillou, J. J., Letolle, R.

Get full text

The Ecological Crisis of the Aral Sea Basin in the Frame of a New Time Scale: The "Anthropo-Geological Scale" by Mainguet, M, Letolle, R

“…At the end of the twentieth century technology has enabled humans to modify their environment so that in a limited time scale (one generation or less) they can…”
Get full text

Observation on the paper by F. Velasco et al: A contribution to the ore genesis of the magnesite deposit of Eugui, Navarra (Spain) (Mineral Deposita 22, 33-41 (1987)). Final proof of sparry magnesites collodial syngenetic origins by CHAYE-D'ALBISSIN, M, GUILLOU, J. J, LETOLLE, R

Get full text

Premières Données Isotopiques sur des Fumerolles de Volcans Italiens by Cheminee, J., Letolle, R., Olive, Ph

Get full text

Utilization of isotopic methods in the study of mineral waters by Glangheaud, L, Blavoux, B, Fontes, J C, Létolle, R, Olive, P

Get more information