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R Viviani

Publications and source records attributed to R Viviani.

34 records · Page 2Linked to original sources
PubMed1966

Lipid metabolism in fatty liver of lysine- and threonine-deficient rats.

Rats were fed a low protein diet deficient in and supplemented with lysine and threonine. Liver lipids contained more lecithin, sphingomyelin, and free fatty acids, and less amino phospholipids in the deficient rats. No variations in fatty acid composition of choline- and ethanolamine-containing phospholipids were found; only palmitic acid was increased in the serine-containing phospholipids of the deficient animals. The incorporation of acetate-(14)C into phospholipids, but not into other liver lipids, was lower in deficient rats. In the plasma of deficient rats the concentration of esterified fatty acids and phospholipids was lower, of free fatty acids higher, than in the controls. The fatty acid composition of depot fat differed from that of liver neutral fat both in deficient and supplemented animals. The results presented establish that multiple metabolic defects resulting from lysine and threonine deficiency accompany the fatty liver. The design of the experiments does not permit conclusions to be drawn regarding the causal relationship between the various alterations in lipid metabolism and the fatty liver.

Acetates↗
PubMedDate not supplied

Tissue polyamine concentrations in the European sea bass (Dicentrarchus labrax L.): change with age and season of the year.

Independently of the age of the European sea bass, putrescine and spermidine are much higher in liver and brain than in muscles, while spermine concentrations are more similar to one another. The polyamine concentrations are higher in 2 years old sea bass than in 1 year old fish except for heart spermidine and liver spermine. Lowering in water temperature causes a decrease in the concentration of spermidine and spermine in all tissues examined. Putrescine, however, increases in heart, caudal muscle, liver and brain and it is unchanged in red and dorsal muscles.

Aging↗