AIM: To study the combinative effects of nanocerium and selenium in a murine model of diabetes. METHODS: Cerium oxide (CeO2) nanoparticles (60 mg/kg per day) and sodium selenite (5 μmol/kg per day) aloneor in combina...AIM: To study the combinative effects of nanocerium and selenium in a murine model of diabetes. METHODS: Cerium oxide (CeO2) nanoparticles (60 mg/kg per day) and sodium selenite (5 μmol/kg per day) aloneor in combination, or the metal form of CeO2 (60 mg/kg) were administered for 2 wk by intraperitoneal injection to streptozotocin-induced diabetic rats. At the end of treatment blood was collected, liver tissue dissected and then oxidative stress markers, extent of energy depletion and lipid prof ile were evaluated.RESULTS: Antioxidant enzymes and high density lipoprotein decreased whereas oxidative stress, adenosine diphosphate/adenosine triphospahte levels, cholesterol, triglyceride and low density lipoprotein increased on induction of diabetes. All were improved by a combination of nanocerium and sodium selenite. There was a relative amelioration by CeO2 nanoparticles or sodium selenite alone, but the metal form of CeO2 showed no signif icant improvement. CONCLUSION: The combination of nanocerium and sodium selenite is more effective than either alone in improving diabetes-induced oxidative stress.展开更多
The synthesis of dialkylureas from amines by oxidative carbonylation with sulfuric acid modified zirconia supported palladium catalyst was investigated under relatively mild reaction conditions. High conversions and y...The synthesis of dialkylureas from amines by oxidative carbonylation with sulfuric acid modified zirconia supported palladium catalyst was investigated under relatively mild reaction conditions. High conversions and yields for the synthesis of symmetric dialkylureas from the reaction between same aliphatic amines were achieved. This supported catalyst can also be easily separated and recovered from the solvent after the reaction.展开更多
基金Supported by a grant from Tehran University of Medical Science, No. 11250 (in part)
文摘AIM: To study the combinative effects of nanocerium and selenium in a murine model of diabetes. METHODS: Cerium oxide (CeO2) nanoparticles (60 mg/kg per day) and sodium selenite (5 μmol/kg per day) aloneor in combination, or the metal form of CeO2 (60 mg/kg) were administered for 2 wk by intraperitoneal injection to streptozotocin-induced diabetic rats. At the end of treatment blood was collected, liver tissue dissected and then oxidative stress markers, extent of energy depletion and lipid prof ile were evaluated.RESULTS: Antioxidant enzymes and high density lipoprotein decreased whereas oxidative stress, adenosine diphosphate/adenosine triphospahte levels, cholesterol, triglyceride and low density lipoprotein increased on induction of diabetes. All were improved by a combination of nanocerium and sodium selenite. There was a relative amelioration by CeO2 nanoparticles or sodium selenite alone, but the metal form of CeO2 showed no signif icant improvement. CONCLUSION: The combination of nanocerium and sodium selenite is more effective than either alone in improving diabetes-induced oxidative stress.
文摘The synthesis of dialkylureas from amines by oxidative carbonylation with sulfuric acid modified zirconia supported palladium catalyst was investigated under relatively mild reaction conditions. High conversions and yields for the synthesis of symmetric dialkylureas from the reaction between same aliphatic amines were achieved. This supported catalyst can also be easily separated and recovered from the solvent after the reaction.
