title: Influence of lactose on the diffusion of calcium ions at physiological temperature.
abstract: Mutual diffusion coefficients for calcium chloride (0.100 mol dm(-3)) in aqueous solutions containing lactose at various concentrations (from 0.005 to 0.200 mol dm(-3)) have been measured at 37°C (physiological temperature), by using a conductimetric cell coupled to an automatic system to follow the diffusion. This cell uses an open-ended capillary method based on the measurement of the electrical resistance of a solution placed inside the capillaries at recorded times. The analysis of the CaCl2 diffusion coefficient values obtained suggests the presence of some CaCl2/lactose aggregates in the media, which are influenced by the temperature.
authors.affiliation: Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal. Electronic address: luisve@gmail.com.
authors.forename: Luis M P
authors.initials: LM
authors.lastname: Verissimo
authors.affiliation: Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal. Electronic address: vaniarib17@hotmail.com.
authors.forename: Vânia C M
authors.initials: VC
authors.lastname: Ribeiro
authors.affiliation: Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal. Electronic address: anacfrib@ci.uc.pt.
authors.forename: Ana C F
authors.initials: AC
authors.lastname: Ribeiro
authors.affiliation: U.D. Química Física, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain. Electronic address: mmelia.rodrigo@uah.es.
authors.forename: M
authors.initials: M
authors.lastname: Melia Rodrigo
authors.affiliation: U.D. Química Física, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain. Electronic address: miguel.esteso@uah.es.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Esteso
mesh_terms: D002122:Calcium Chloride / Q000737:chemistry*; D004058:Diffusion; D007477:Ions / Q000737:chemistry; D007785:Lactose / Q000032:analysis*; D013696:Temperature
chemical_list: D007477:Ions; D007785:Lactose; D002122:Calcium Chloride
keywords: Calcium chloride; Lactose; Mutual diffusion coefficient; Solutions; Transport properties