The effects of the acid leaching and alkali fusion on the leaching efficiency of Y,Eu,Ce,and Tb from the waste rare earth fluorescent powders were investigated in this paper.The results show that hydrochloric acid is ...The effects of the acid leaching and alkali fusion on the leaching efficiency of Y,Eu,Ce,and Tb from the waste rare earth fluorescent powders were investigated in this paper.The results show that hydrochloric acid is better than sulfuric acid in the first acid leaching,and NaOH is better than Na2CO3in the alkali fusion.In the first acid leaching,the Wloss is 20.94%when the waste rare earth fluorescent powders are acid leached in H?concentration 3 mol L-1and S/L ratio 1:3 for 4 h due to red powders dissolved.The better results of the alkali fusion can be got at 800℃ for 2 h when the NaOH is used.The blue powders and the green powders can be dissolved into NaAlO2and oxides such as rare earth oxide(REO).The REO can be dissolved in H?concentration 5 mol L-1,S/L1:10 for 3 h in the second acid leaching.The leaching rates of the Y,Eu,Ce,and Tb are 99.06%,97.38%,98.22%,and 98.15%,respectively.The leaching rate of the total rare earth is 98.60%.展开更多
The fungi Phanerochaete chrysosporium (PC) and Saccharomyces cerevisiae Y99 and the native bacterium YZ1 were the three parental strains for construction of hybrid cells through protoplast fusion to degrade te...The fungi Phanerochaete chrysosporium (PC) and Saccharomyces cerevisiae Y99 and the native bacterium YZ1 were the three parental strains for construction of hybrid cells through protoplast fusion to degrade terephthalic acid (TPA) wastewater. The results showed that the native bacterium YZ1 protoplasm could integrate with that of PC to form the hybrid cell Fhh and the fungus Y99 protoplasm also could integrate with that of Fhh to form the hybrid cell Fhhh. The protoplasts of YZ1 and Y99 could change the morphology of PC spore and mycelium for two times. The hybrid cell Fhhh got the best growth and degradation abilities in the wastewater. It suggested that the hybrid strains obtained from the inter\|kingdom protoplast fusion of the three parental strains could create potential for the purification of TPA wastewater.展开更多
Introduction Purple acid phosphatases （PAPs） comprise of a family of binuclear metal-containing hydrolases, some members of which have been isolated and characterized from animal, plant and fungal sources . PAPs ...Introduction Purple acid phosphatases （PAPs） comprise of a family of binuclear metal-containing hydrolases, some members of which have been isolated and characterized from animal, plant and fungal sources . PAPs not only catalyze the hydrolyses of a wide range of phosphate esters and anhydrides under acidic reaction conditions, but also catalyze the generation of hydroxyl radicals in a Fenton-like reaction, by virtue of the presence of a redox-active binuclear metal center. Inmammals,展开更多
目的:研究氨甲环酸不同使用方式对行单节段后入路腰椎椎体融合术患者的影响。方法:将接受后入路腰椎椎体融合术(PLIF)治疗的患者90例分成A、B、C 3个组,每组各30例。A组在术前15 min静注100 mL氨甲环酸(TXA)溶液(15 mg/kg TXA:100 mL 0....目的:研究氨甲环酸不同使用方式对行单节段后入路腰椎椎体融合术患者的影响。方法:将接受后入路腰椎椎体融合术(PLIF)治疗的患者90例分成A、B、C 3个组,每组各30例。A组在术前15 min静注100 mL氨甲环酸(TXA)溶液(15 mg/kg TXA:100 mL 0.9%NaCl溶液),B组患者于缝合深筋膜前,用20 mL TXA溶液(1 g TXA:20 mL 0.9%NaCl溶液)浸泡创面5 min,冲洗后单侧留置引流管,C组患者留置引流管后沿引流管向切口内注入20 mL TXA溶液(1 g TXA:20 mL 0.9%NaCl溶液)。观察各组临床指标及术后并发症发生情况。结果:(1)血红蛋白与红细胞压积比较:术后1 d时A组高于B、C组(P<0.05);术后3 d时C组高于A、B组(P<0.05);(2)总失血量、术后引流量、隐性失血量比较:C组低于A、B两组(P<0.05);(3)术中失血量比较:A组低于B、C组(P<0.05);(4)术后1、3 d的D-二聚体、凝血五项比较:差异无统计学意义(P>0.05);(5)术后并发症发生情况比较:差异无统计学意义(P>0.05)。结论:行单节段PLIF术后的患者局部应用TXA联合引流管夹闭1 h的方式能减少患者围手术期总失血量、术后引流量和隐性失血量且安全性与传统静脉滴注相当,值得临床推广。展开更多
基金supported by the National Hi-Tech R&D Program of China (No. 2012AA063202)National Key Project of Scientific and Technical Support Program of China (Nos. 2011BAE13B07, 2012BAC02B01, and 2011BAC10B02)National Natural Science Foundation of China (Nos. 51174247 and 50972013)
文摘The effects of the acid leaching and alkali fusion on the leaching efficiency of Y,Eu,Ce,and Tb from the waste rare earth fluorescent powders were investigated in this paper.The results show that hydrochloric acid is better than sulfuric acid in the first acid leaching,and NaOH is better than Na2CO3in the alkali fusion.In the first acid leaching,the Wloss is 20.94%when the waste rare earth fluorescent powders are acid leached in H?concentration 3 mol L-1and S/L ratio 1:3 for 4 h due to red powders dissolved.The better results of the alkali fusion can be got at 800℃ for 2 h when the NaOH is used.The blue powders and the green powders can be dissolved into NaAlO2and oxides such as rare earth oxide(REO).The REO can be dissolved in H?concentration 5 mol L-1,S/L1:10 for 3 h in the second acid leaching.The leaching rates of the Y,Eu,Ce,and Tb are 99.06%,97.38%,98.22%,and 98.15%,respectively.The leaching rate of the total rare earth is 98.60%.
基金TheNationalNaturalScienceFoundationofChina !(No .395 70 10 1)andNSFofJiangsuProvince (No .BK 990 33)
文摘The fungi Phanerochaete chrysosporium (PC) and Saccharomyces cerevisiae Y99 and the native bacterium YZ1 were the three parental strains for construction of hybrid cells through protoplast fusion to degrade terephthalic acid (TPA) wastewater. The results showed that the native bacterium YZ1 protoplasm could integrate with that of PC to form the hybrid cell Fhh and the fungus Y99 protoplasm also could integrate with that of Fhh to form the hybrid cell Fhhh. The protoplasts of YZ1 and Y99 could change the morphology of PC spore and mycelium for two times. The hybrid cell Fhhh got the best growth and degradation abilities in the wastewater. It suggested that the hybrid strains obtained from the inter\|kingdom protoplast fusion of the three parental strains could create potential for the purification of TPA wastewater.
文摘Introduction Purple acid phosphatases （PAPs） comprise of a family of binuclear metal-containing hydrolases, some members of which have been isolated and characterized from animal, plant and fungal sources . PAPs not only catalyze the hydrolyses of a wide range of phosphate esters and anhydrides under acidic reaction conditions, but also catalyze the generation of hydroxyl radicals in a Fenton-like reaction, by virtue of the presence of a redox-active binuclear metal center. Inmammals,
文摘目的:研究氨甲环酸不同使用方式对行单节段后入路腰椎椎体融合术患者的影响。方法:将接受后入路腰椎椎体融合术(PLIF)治疗的患者90例分成A、B、C 3个组,每组各30例。A组在术前15 min静注100 mL氨甲环酸(TXA)溶液(15 mg/kg TXA:100 mL 0.9%NaCl溶液),B组患者于缝合深筋膜前,用20 mL TXA溶液(1 g TXA:20 mL 0.9%NaCl溶液)浸泡创面5 min,冲洗后单侧留置引流管,C组患者留置引流管后沿引流管向切口内注入20 mL TXA溶液(1 g TXA:20 mL 0.9%NaCl溶液)。观察各组临床指标及术后并发症发生情况。结果:(1)血红蛋白与红细胞压积比较:术后1 d时A组高于B、C组(P<0.05);术后3 d时C组高于A、B组(P<0.05);(2)总失血量、术后引流量、隐性失血量比较:C组低于A、B两组(P<0.05);(3)术中失血量比较:A组低于B、C组(P<0.05);(4)术后1、3 d的D-二聚体、凝血五项比较:差异无统计学意义(P>0.05);(5)术后并发症发生情况比较:差异无统计学意义(P>0.05)。结论:行单节段PLIF术后的患者局部应用TXA联合引流管夹闭1 h的方式能减少患者围手术期总失血量、术后引流量和隐性失血量且安全性与传统静脉滴注相当,值得临床推广。
