Sir: Clinical and nutritional studies have indicated that high cholesterol levels in the blood may be one of the major causes of atherosclerosis and coronary heart disease. In this context the metabolism of cholesterol in liver is of paramount importance because liver seems to be the sole organ supplying serum cholesterol and because the conversion of cholesterol into bile acids in liver is qua...

We consider the possibility that the dark matter in the halos of galaxies may be in the form of clusters of Machos within which are embedded cold, dense gas clouds. Mi-crolensing experiments have found evidence that the Galactic halo contains up to half of its mass in the form of low-mass Machos. A number of observational and dynamical arguments point to the existence of hitherto unobserved col...

Just a small contingent of Pharmamar’s staff, which is, with a total of 262 employees, one of the main biotechnological companies in Spain. Ph ot os (5 ): P ha rm am ar Like Captain Nemo, the mysterious character created by Jules Verne, Jose María Fernández Sousa-Faro decided to seek his fortune in the depths of the oceans. His reasons were not, however, as obscure as Nemo’s. He had inherited t...

The contamination of bulk samples of cow’s raw milk (n = 491) by psychrotrophic lipolytic bacteria (PLiBC), total count of psychrotrophic bacteria (PBC) and mesophilic bacteria (TBC) was monitored for two years on eight dairy farms and the correlations among these groups of bacteria were analysed. An increase in TBC, PBC and PLiBC and in the values of free fatty acids (FFA) was tested experimen...