title: [Lithium exchange in from epithelium: determination of unidirectional flux using the stable isotopes 6Li and 7Li in an ionic analyzer].
abstract: The use of the stable isotopes 6 and 7 of lithium, and detection with the ionic analyser, allow the measurement of unidirectional transepithelial Li-fluxes, between "external" and "internal" solutions which both contain 80% Na and 20% Li. Efflux was found to be bigger than influx. An important lag-phase on the curve, reveals the interference of a Li-compartment, with a high capacity, in the epithelium itself.
mesh_terms: D000818:Animals; D001001:Anura; D001692:Biological Transport; D004848:Epithelium / Q000378:metabolism; D007553:Isotope Labeling / Q000379:methods; D007554:Isotopes; D007700:Kinetics; D008094:Lithium / Q000378:metabolism*; D008722:Methods; D011893:Rana esculenta; D012867:Skin / Q000378:metabolism*
chemical_list: D007554:Isotopes; D008094:Lithium
vernacular_title: Echanges de lithium de l'épithélium de Grenouille: détermination des flux unidirectionnels à l'aide des isotopes STABLES 6Li et 7Li et d'un analyseur ionique.