[Continuous-flow determination of delta-aminolevulinic acid in urine (author's transl)]. / Dosage de l'acide delta-aminolévulinique urinaire. Automatisation en flux continu.

The automatic determination of urinary ALA using a continuous flow methodology, is described. The amplification of the measured signal, with an adjusted range expander, allows to reduce the sample volume and to decrease drastically the effects of interfering substances. The results are compared with the reference method of Davis and Andelman [11].

[Properties of histones on hydrophobic chromatography]. / Le comportement des histones en chromatographie hydrophobe

The hydrophobic chromatography on alkylated Sepharose allows to separate the histones into three groups which exhibit an increasing affinity for the support HI less than H2A-H2B less than H3-H4. In this fractionation procedure, the behaviour of the histones taken separately or pair-associated, is discussed in relation with the ability of these proteins to complex each other in vitro and in vivo.