Magnesium sulfate was proposed to be leaching agent to deal with the ion-adsorption type rare earths ore to reduce or even eliminate ammonia?nitrogen emissions. The effects of temperature, particle size and stirring s...Magnesium sulfate was proposed to be leaching agent to deal with the ion-adsorption type rare earths ore to reduce or even eliminate ammonia?nitrogen emissions. The effects of temperature, particle size and stirring speed on rare earth leaching process and the leaching behaviors of the single rare earth element were investigated in order to reveal the rare earth leaching characteristics. Besides, the comparison of leaching effects between magnesium sulfate and ammonium sulfate was also studied. The results showed that the rare earth leaching process could be well described with inner diffusion control model and the apparent activation energy was 9.48 kJ/mol. The leaching behaviors of the single rare earth element were brought into correspondence with rare earths. Moreover, when the concentration of leaching agent was 0.20 mol/L, the rare earth leaching efficiency could all reach above 95% and the leaching efficiency of aluminum impurities could be restrained by 10% using magnesium sulfate compared with ammonium sulfate.展开更多
目的：比较颈椎单开门椎管扩大成形术中使用Osteo Med M3钉板内固定及丝线组固定疗效。方法：选择多节段椎间盘突出并椎管狭窄等颈椎疾患35例,术后比较两组治疗效果。结果：两组均顺利完成手术,Osteo Med M3钉板组手术时间2.74±0.5...目的：比较颈椎单开门椎管扩大成形术中使用Osteo Med M3钉板内固定及丝线组固定疗效。方法：选择多节段椎间盘突出并椎管狭窄等颈椎疾患35例,术后比较两组治疗效果。结果：两组均顺利完成手术,Osteo Med M3钉板组手术时间2.74±0.54h,出血量175±77ml,丝线组手术时间3.34±0.9h,出血量300±204ml,均有明显统计学差异（P〈0.05）。术后实施抗生素等常规治疗,两组未出现神经损伤、伤口感染等并发症。Osteo Med M3钉板组随访时间9-31月,平均17.3月;丝线组随访时间6-32月,平均16.1月。复查MRI或CT示两组门轴侧沟槽达骨性融合,未发现完全再关门病例,Osteo Med M3钉板组无螺钉松动。结论：Osteo Med M3钉板系统是颈后路单开手术理想的内固定材料,易于塑形,操作安全简单,可重建后方附件结构的完整性,减少了手术时间及出血量,术后并发症少,且费用低廉,是替代传统单开门手术的理想术式。展开更多
基金Project(2015BAB16B01)supported by the National Science and Technology Support Program of China
文摘Magnesium sulfate was proposed to be leaching agent to deal with the ion-adsorption type rare earths ore to reduce or even eliminate ammonia?nitrogen emissions. The effects of temperature, particle size and stirring speed on rare earth leaching process and the leaching behaviors of the single rare earth element were investigated in order to reveal the rare earth leaching characteristics. Besides, the comparison of leaching effects between magnesium sulfate and ammonium sulfate was also studied. The results showed that the rare earth leaching process could be well described with inner diffusion control model and the apparent activation energy was 9.48 kJ/mol. The leaching behaviors of the single rare earth element were brought into correspondence with rare earths. Moreover, when the concentration of leaching agent was 0.20 mol/L, the rare earth leaching efficiency could all reach above 95% and the leaching efficiency of aluminum impurities could be restrained by 10% using magnesium sulfate compared with ammonium sulfate.
文摘目的：比较颈椎单开门椎管扩大成形术中使用Osteo Med M3钉板内固定及丝线组固定疗效。方法：选择多节段椎间盘突出并椎管狭窄等颈椎疾患35例,术后比较两组治疗效果。结果：两组均顺利完成手术,Osteo Med M3钉板组手术时间2.74±0.54h,出血量175±77ml,丝线组手术时间3.34±0.9h,出血量300±204ml,均有明显统计学差异（P〈0.05）。术后实施抗生素等常规治疗,两组未出现神经损伤、伤口感染等并发症。Osteo Med M3钉板组随访时间9-31月,平均17.3月;丝线组随访时间6-32月,平均16.1月。复查MRI或CT示两组门轴侧沟槽达骨性融合,未发现完全再关门病例,Osteo Med M3钉板组无螺钉松动。结论：Osteo Med M3钉板系统是颈后路单开手术理想的内固定材料,易于塑形,操作安全简单,可重建后方附件结构的完整性,减少了手术时间及出血量,术后并发症少,且费用低廉,是替代传统单开门手术的理想术式。
