Publicação
Influence of lactose on the diffusion of calcium ions at physiological temperature
| Resumo: | 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. |
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| Autores principais: | Verissimo, Luis M. P. |
| Outros Autores: | Ribeiro, Vânia C. M.; Ribeiro, Ana C. F.; Rodrigo, M. Melia |
| Assunto: | Lactose Calcium chloride Solutions Mutual diffusion coefficient Transport properties |
| Ano: | 2014 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Coimbra |
| Idioma: | inglês |
| Origem: | Estudo Geral - Universidade de Coimbra |
| Resumo: | 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. |
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