Catalytic Oxidation of Propylene, Toluene, Carbon Monoxide, and Carbon Black over Au/CeO 2

Au/CeO2 solids were prepared by two methods: deposition-precipitation (DP) and impregnation (Imp). The prepared solids were calcined under air at 400°C. Both types of catalysts have been tested in the total oxidation of propylene, toluene, carbon monoxide, and carbon black. Au/CeO2-DP solids were the most reactive owing to the high number of gold nanoparticles and Au+ species and the low concentration of Cl- ions present on its surface compared to those observed in Au/CeO2-Imp solids

Protective effect of Cinnamomum zeylanicum L. bark essential oil, on hepatic and renal toxicity induced by CCl4 in rats

The inner bark of cinnamon (Cinnamomum zeylanicum L.) is widely used as a spice. Cinnamomum plants are also a valuable sources of essential oil used for medicinal purposes. The present study aimed to investigate: the composition, the in vitro antioxidant activity of C. zeylanicum bark essential oil (CzEO) and its protective effects in vivo on CCl4-induced hepatic and renal toxicity in rats. Groups of animals were pretreated for seven days with different concentrations of CzEO or controls and on day 7 a single dose of CCl4 was used to induce oxidative stress in rats. Twenty-four hours after CCl4 administration, the animals were sampled. In the controls, CCl4 induced an increase of serum biochemical parameters and triggered oxidative stress in both liver and kidneys. CzEO (100 mg/kg) caused significant reductions in CCl4-elevated levels of ALT, AST, ALP, LDH, ÎłGT,total cholesterol, triglycerides, LDL urea and creatinine and increased the level of HDL compared to the CCl4 group. Moreover, pre-treatment with the CzEO at doses of 70 and 100 mg/kg BW to the rats treated with CCl4 produced significant reductions in TBARS and PCO levels in liver and kidney tissues as compared to CCl4 group. The formation of pathological hepatic and kidney lesions induced by the administration of CCl4 was strongly prevented by CzEO at a dose of 100 mg/kg BW. Overall, this study suggests that administration of CzEO displayed high potential to quench free radicals and alleviate CCl4-induced hepatorenal toxicity in rats.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author