Kieserite on Mars: The hydrous Mg-sulfate that has been identified definitively on Mars by OMEGA (Mars Express orbiter) is kieserite (MgSO4·H2O) [1]. An additional class of OMEGA spectra has been attributed to “polyhydrated sulfate.” This class has spectral features that match Mg-sulfates of higher hydration or multi-cation sulfates [2,3]. Ca-sulfates, especially gypsum (CaSO4·2H2O), are also i...

PCBs, such as PCB3, are air contaminants in buildings and outdoors. Metabolites of PCB3 are potential endocrine disrupting chemicals and genotoxic agents. We studied the disposition of phenolic and sulfated metabolites after acute nose-only inhalation exposure to airborne PCB3 for 2 h in female rats. Inhalation exposure was carried out in three groups. In the first group, rats exposed to an est...

Laidlaw and Young, in a recent report (l), have investigated the question of whether or not inorganic sulfate is utilized in the synthesis of ethereal sulfates. These investigators have shown, beyond any reasonable doubt, that inorganic sulfate may be utilized in the synthesis, but their data, as reported, do not permit the conclusion that inorganic sulfate of the diet is utilized to any apprec...

The effect of sulfur on the water-gas-shift (WGS) activity of Pd/ceria catalysts has been studied using steadystate rate measurements, pulse-reactor studies, and FTIR. After exposing Pd/ceria to SO2 at 673 K in an oxidizing environment, the WGS rates dropped to a value close to that observed on Pd/alumina. Both pulsereactor and FTIR measurements showed that cerium sulfates can be readily reduce...