Result Compared with the control,at 64-1 024 mg/L,the activity of SOD and CAT in the third-instar larvae significantly decreased and at 1-16 mg/L,the activity of SOD and CAT significantly increased Conclusion It suggested that cerium sulfate [Ce(SO4)2] has an oxidant toxicity to Drosophila melanogaster.
The optimum conditions are as follows: the molar ratio of ethyl acetoacetate to alcohol was 1.0∶1.4,the amount of catalyst was 0.5g/0.1mol ethyl acetoacetate,the reaction time was 3h. Ammonium ceric sulfate was a good catalyst for synthesizing acetoacetic ester cyclic ethylene ketal,the yield is over 80.1%.
The optimum conditions are as follows: the reaction temperature is 65℃, the reaction time is 1.2h and the mole ratio of cerous sulfate to naphthalene is 5∶1. Under above-mentioned conditions, the yield of the product is 81.5% and the purity of final product is above 99%.
The influence of cerium sulphate on fast-speed nickel brush plating layer was investigated by adding it in the brush plating solution. The depositing rate,hole rate and hardness of the coatings were measured and the influencing mechanisms of cerium sulphate were discussed.
Crystal Structure of a Mixed-Valence Hydroxonium Cerium Sulfate Hydrate
On the other hand, both cerium adducts are white, suggesting that, for pu and etu cerium sulfate adducts, a ligand-to-metal charge-transfer promotes the reduction of CeIV to CeIII.
The H2 and CO evolutions were obtained from Pt/CH3OH/H2O solution and O2 evolution was generated from an aqueous cerium sulfate solution.
The reaction of cerium sulfate (III) with orthophosphoric acid and its sodium salts in aqueous solution at 25°
1.The reaction between cerium sulfate and phosphoric acid and its mono- or disodium salts in aqueous solution gives difficulty soluble precipitates of cerosulfatophosphates, and then of neutral cerophosphate.