s-Carboxymethylcysteine inhibits carbachol-induced constriction of epithelium-denuded rat and human airway preparations.

1. The effects of s-carboxymethyl-L-cysteine (S-CMC), either administered orally to rats or incubated with tissue preparations from rats and humans, on isometric contractions of tracheal smooth muscle were investigated in the present study using an improved in vitro model of tracheal tube or ring preparations. The involvement of the tracheal epithelium in the observed effects was also investigated.

Binding of 241Am to carp cytosolic fractions in vitro.

Recent studies on the competition between Cd and radionuclides have been reported in marine species. The present investigation aims to study the binding of 241Am to freshwater fish cytosolic fraction before and after Cd-treatment. The main organs studied are the liver, kidneys and muscles.

Chemical behaviour of three radionuclides (cesium, americium and technetium) and their uptake at the cytosolic level in aquatic organisms.

In previous papers, we observed that there were great differences in the subcellular accumulation and elimination of 137Cs, 99Tc and 241Am in different marine animals. In this study, we analysed and compared the behaviour of these radionuclides at the cytosolic level. We found great similarities in the cytosolic distribution of a given radionuclide in the various organisms studied.