Results 111 to 120 of about 3,229,380 (244)

Determination of micellar system behavior in the presence of salt and water-soluble polymers using the phase diagram technique [PDF]

open access: yes, 2007
The application of micellar systems has been growing during the last years because of their importance in various practical situations. Continued development of their application is necessary.
Bensmaili, Aicha   +4 more
core   +1 more source

Random Hydrophilic-Hydrophobic Copolymers

open access: yes, 1994
We study a single statistical amphiphilic copolymer chain AB in a selective solvent (e.g.water). Two situations are considered. In the annealed case, hydrophilic (A) and hydrophobic (B) monomers are at local chemical equilibrium and both the fraction of ...
Garel, T., Leibler, L., Orland, H.
core   +3 more sources

Knock-Out of the Genes Coding for the Rieske Protein and the ATP-Synthase δ-Subunit of Arabidopsis [PDF]

open access: yes, 2003
In Arabidopsis, the nuclear genes PetC and AtpD code for the Rieske protein of the cytochrome b6/f (cyt b6/f) complex and the δ-subunit of the chloroplast ATP synthase (cpATPase), respectively.
Dietzmann, Angela   +8 more
core   +1 more source

Composition minérale des ligneux consommés par les ruminants de la zone sahélienne

open access: yesRevue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 1986
Les éléments minéraux majeurs Ca, P, Mg, K et Na ainsi que les oligo-éléments Fe, Cu, Zn et Mn ont été dosés dans 22 échantillons de ligneux récoltés dans la zone sahélienne du Mali.
M. Diagayété, H. Schenkel
doaj   +1 more source

Sur la composition chimique moyenne des amphibolites

open access: yesBulletin de la Société Géologique de France, 1953
Abstract In a majority of cases, amphibolites derived from sedimentary rocks can be distinguished from those derived from dioritic or gabbroic igneous rocks on the basis of average chemical composition. From the purely chemical point of view, it is possible to consider that eclogites result from metamorphism of certain types of ...
openaire   +1 more source

Flux de CO2 consommé par altération chimique continentale : influences du drainage et de la lithologie = CO2 flux consumed by chemical weathering of continents : influences of drainage and lithology [PDF]

open access: yes, 1993
The flux of atmospheric/soil CO2 consumed by chemical weathering of the continents (FCO2) can be estimated from bicarbonate concentrations in surface water.
Amiotte Suchet, Philippe   +1 more
core  

Effect of the semi-conductive properties of the passive layer on the current provided by stainless steel microbial cathodes [PDF]

open access: yes, 2011
Geobacter sulfur reducens biofilms were formed under constant polarisation at −0.6 V vs. Ag/AgCl on stainless steel cathodes to catalyse the reduction of fumarate.
Basséguy, Régine   +3 more
core   +2 more sources

Mesures physiques de la variabilité des sols en agriculture de précision

open access: yesSciences, Eaux & Territoires, 2000
Le sol, composante majeure du rendement des cultures, peut présenter une variabilité spatiale et temporelle importante. Ce document présente différentes méthodes de caractérisation utilisables dans un objectif d'agriculture de précision.
J.P. DOUZALS
doaj  

Composition en acides aminés des principales légumineuses fourragères de Madagascar

open access: yesRevue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 1968
La composition en acides aminés des principales légumineuses fourragères de Madagascar a été déterminée après hydrolyse, séparation par chromatographie sur colonne de résine, et réaction colorée à la ninhydrine. Le tryptophane a été dosé selon la méthode
R. Gaulier
doaj   +1 more source

Permeability and chemical analysis of aromatic polyamide based membranes exposed to sodium hypochlorite [PDF]

open access: yes, 2011
In this study, a cross-linked aromatic polyamide based reverse osmosis membrane was exposed to variable sodium hypochlorite ageing conditions (free chlorine concentration, solution pH) and the resulting evolutions of membrane surface chemical and ...
Aimar, Pierre   +4 more
core   +2 more sources

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