[Common values of serum selenium in a population in Eastern France].

Eastern France is a low selenium area. Livestock grazing on this soil had low selenium concentration. In human adults, the serum selenium levels were 0.

Serum iron and transferrin during an exhaustive session of interval training.

Conflicting data have been reported on "sports anaemia" and anaemia during physical training. Most of these results are of studies at rest before or after training. The aim of this investigation was to further study the profiles of serum iron (Se Fe) and transferrin (Se Tr), in 14 physically trained men (28 +/- 6 years) during an exhaustive interval training session.

[Experimental conditions of a technic of in vitro transcription using placental nuclei].

To examine the expression of human placental lactogen, we investigated transcription in isolated placental nuclei. Using SH-agarose affinity chromatography, we have isolated Hg-RNA synthetized in vitro. These RNA are translated in a wheat germ cell-free system.

The biological assay of human somatomedin A: improvement by small molecular weight natural molecules.

Somatomedin activity is often measured by 35SO4 uptake in pelvic chick embryo cartilage. This assay gives good results when the somatomedin activity is measured in serum, but often gives uninterpretable results for purified somatomedin. An ultrafiltrate (UF 1000) obtained from human normal serum, added to the incubation medium allows measurement of biological somatomedin activity even when somatomedin is highly purified.