Inorganic Analyses of Martian Surface Samples at the Viking Landing Sites

Elemental analyses of fines in the Martian regolith at two widely separated landing sites, Chryse Planitia and Utopia Planitia, produced remarkably similar results. At both sites, the uppermost regolith contains abundant Si and Fe, with significant concentrations of Mg, Al, S, Ca, and Ti. The S concentration is one to two orders of magnitude higher, and K(<0.25 percent by weight) is at least 5 times lower than the average for the earth's crust. The trace elements Sr, Y, and possibly Zr, have been detected at concentrations near or below 100 parts per million. Pebblesized fragments sampled at Chryse contain more S than the bulk fines, and are thought to be pieces of a sulfate-cemented duricrust.

Serum protein changes in coal workers' pneumoconiosis

Differences from the normal were found in the serum proteins of coal workers suffering from pneumoconiosis which were similar to those in subjects suffereing from bronchitis, cancer and rheumatoid arthritis. The differences consisted of decreased albumin and increased globulin contents, and decreased sulphydryl contents, and decreased sulphydryl contents in both albumin and globulin proteins. These differences caused a reduction in the number of protein sulphydryl groups in serum. In pnemoconiotic coal workers the amount of idsulphide-linked cysteine in albumin increased above the normal, the increase tending to depend on the severity of the pneumoconiosis. Apart from this correlation the above differences could not be used to diagnose the class of pneumoconiosis.

Serum sulphydryl levels in rheumatoid patients treated with alclofenac

Serum sulphydryl levels, which are decreased in rheumatoid patients, are increased to near normal during treatment with alclofenac. The biochemical function of the sulphydryl group and its possible pathogenic significance in rheumatoid and other auto-immune diseases are discussed.