Road transportation in urban areas may be considered a major source of environmental pollution. The purpose this study is to determine the effectiveness oxidation carbon dioxide gas emitted by an internal combustion engine. This achieved using asphaltic pavement coated with Cu/TiO2 nanoparticles spraying and irradiating white light under ambient conditions reduce air pollution problem (carbon m...

It has recently been suggested that the active site histidine residue in papain and stem-bromelain have pK, values of 6.7 and 6.4 respectively and since these enzymes are essentially pH-independent for substrate hydrolysis at these pH values, histidine is not directly involved in their catalytic mechanism [l-3] This conclusion is based on photo-oxidation experiments during which the active site...

TiCl4, ammonia, inorganic salts as raw material, nanometer composite-crystal TiO2 powders were synthesized by two-step chemical method. Precursors were crystallized with different phase and stable composite-crystal TiO2 with anatase and rutile phase was prepared at low temperature. Quantitative control of crystal phase was realized. Remarkable factors includ...