Biomedical subjects
Publications and source records attributed to J A Cebrian.
"This study addressed the problem of the Moroccan immigration into Spain within the context of South-North movements, focusing on analyzing provisional data from the last immigrant regularization in the country completed during the end months of 1991."
The milk proteins alpha-lactalbumin and beta-lactoglobulin have been isolated from bovine whey by fractional precipitation with polyethylene glycol (PEG) and hydrophobic partitioning in aqueous PEG-hydroxypropylstarch two-phase systems using PEG-bound palmitate as hydrophobic ligand. The possible use of this combination for large scale purification of these whey proteins is discussed.
The partitioning of alpha-lactalbumin and beta-lactoglobulin from bovine whey has been studied in an aqueous poly(ethylene glycol) (PEG)-hydroxypropylstarch two-phase system. The influence of several parameters including concentrations of polymers, sodium phosphate buffer, KSCN, and of PEG palmitate, with and without the presence of Ca2+, on the partitioning of the proteins has been investigated. The separation of the two proteins was demonstrated by counter-current distribution. A purification procedure for both proteins has been developed by using PEG-hydroxypropylstarch two-phase system. This system is compared with the more costly standard system based on PEG and dextran. The possible use of the aqueous two-phase systems for batch extraction for large scale purification of these whey proteins is discussed.