Well-crystallized Ba2SiO4:Eu powders were grown on a substrate by the vapor phase reaction between a mixed powder (barium carbonate and europium oxide) and SiO gas. The vaporization of SiO occurs at 1400–1600◦C from the SiO2 source (or SiO powder) in a reducing atmosphere. The formed SiO gas was transported by 95 vol% Ar 5 vol% H2 gas and reacted with the raw material powders. The emission inte...

Diesel engines, generating harmful NOx, will be subjected to legislation that stipulates large reductions in emission levels beginning in 2007. For controlling emissions, a NOx sensor is needed to provide feedback to the engine management system. In this work, we take advantage of the high mass sensitivity of resonant sensors and the chemical reaction of barium carbonate (BaCO3) with NO2 gas as...

Microbial processes played a major role in mineral precipitation throughout the Earth’s history. Such processes have been widely discussed for the last few decades with regard to carbonate precipitation. Other than microbial precipitation of carbonates, in natural environments is also of great interest the potential role of microbes in the precipitation of marine barite. Regarding carbonates, o...

A reverse micelle based approach is reported for the synthesis of BaCO3 nanowires with lengths up to 100 μm and diameters as small as 10-30 nm, each of which is a continuous single crystal with the c-axis along the wire length axis. The synthesis is achieved by the reaction of barium and carbonate ions solubilized in the polar cores of nonionic reverse micelles of C12E4 (tetraethylene glycol mo...

'LFulbright Research Scholar, Department of Medicine, Oslo University, 1953-1954. 2 Present Address: Hematology Section, Veterans Administration Hospital, Long Beach, California. There is no standard nomenclature for the newer clotting factors. The following terms are used in this paper. Blood thromboplastin is used in its classic meaning of an activity which arises during clotting and which is...