Spinel oxide(NiCo_(2)O_(4))has demonstrated great potential to replace noble metal catalysts for the oxidation reaction of air pollutants.To further boost the oxidation ability of such catalysts,in this study,a facile...Spinel oxide(NiCo_(2)O_(4))has demonstrated great potential to replace noble metal catalysts for the oxidation reaction of air pollutants.To further boost the oxidation ability of such catalysts,in this study,a facile surface-engineering strategy wherein NiCo_(2)O_(4) was treated with different alkali solvents was developed.The obtained catalyst(NiCo_(2)O_(4)-OH)showed a higher surface alkalinity and more surface defects compared to the pristine spinel oxide,including enhanced structural distortion as well as promoted oxygen vacancies.The propane oxidation ability of NiCo_(2)O_(4)-OH was greatly enhanced,with a propane conversion rate that was approximately 6.4 times higher than that of pristine NiCo_(2)O_(4) at a reaction temperature 193℃.This work sets a valuable paradigm for the surface modulation of spinel oxide via alkali treatment to ensure a high-performance oxidation catalyst.展开更多
目的探讨利用自制带孔克氏针卵圆钳辅助微创缝合技术治疗急性闭合性跟腱断裂的手术疗效。方法对郑州市骨科医院2019年11月至2021年2月收治的18例行带孔克氏针卵圆钳辅助微创缝合手术的急性闭合性跟腱断裂患者的资料进行回顾性分析,其中...目的探讨利用自制带孔克氏针卵圆钳辅助微创缝合技术治疗急性闭合性跟腱断裂的手术疗效。方法对郑州市骨科医院2019年11月至2021年2月收治的18例行带孔克氏针卵圆钳辅助微创缝合手术的急性闭合性跟腱断裂患者的资料进行回顾性分析,其中男13例、女5例,平均年龄为28.5(18~38)岁;受伤至手术平均时间为1.5(0.4~2.0)d;在跟腱断裂处采取横切口,平均长度为3.5(3~5)cm。术后1年随访时,采用美国足踝外科协会(American Orthopaedic Foot and Ankle Society,AOFAS)踝-后足评分系统、跟腱完全断裂评分系统(achilles tendon total rupture score,ATRS)及Amer-Lindholm评分评价手术疗效,并对比患者两侧的小腿周径。结果所有患者手术切口一期愈合,均未发生神经、血管损伤等并发症。18例患者获得完全随访,随访时间为12~18个月,平均(14.25±4.00)个月。术后1年随访时,患者的AOFAS评分为(95.62±2.05)分;ATRS评分为(82.56±3.71)分;患者小腿周径患侧为(37.72±5.16)cm、健侧为(37.80±2.65)cm,两侧比较差异无统计学意义(P>0.05)。按Amer-Lindholm评分评价,本组疗效优15例、良3例、差0例,优良率为100.00%(18/18)。结论对于急性闭合性跟腱断裂,采用自制带孔克氏针卵圆钳辅助微创缝合,创伤小,并发症少,恢复快,效果确切。展开更多
基金financially supported by the National Natural Science Foundation of China(No.22072069)the Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials(Wuhan University of Science and Technology No.WKDM202303).
文摘Spinel oxide(NiCo_(2)O_(4))has demonstrated great potential to replace noble metal catalysts for the oxidation reaction of air pollutants.To further boost the oxidation ability of such catalysts,in this study,a facile surface-engineering strategy wherein NiCo_(2)O_(4) was treated with different alkali solvents was developed.The obtained catalyst(NiCo_(2)O_(4)-OH)showed a higher surface alkalinity and more surface defects compared to the pristine spinel oxide,including enhanced structural distortion as well as promoted oxygen vacancies.The propane oxidation ability of NiCo_(2)O_(4)-OH was greatly enhanced,with a propane conversion rate that was approximately 6.4 times higher than that of pristine NiCo_(2)O_(4) at a reaction temperature 193℃.This work sets a valuable paradigm for the surface modulation of spinel oxide via alkali treatment to ensure a high-performance oxidation catalyst.
文摘目的探讨利用自制带孔克氏针卵圆钳辅助微创缝合技术治疗急性闭合性跟腱断裂的手术疗效。方法对郑州市骨科医院2019年11月至2021年2月收治的18例行带孔克氏针卵圆钳辅助微创缝合手术的急性闭合性跟腱断裂患者的资料进行回顾性分析,其中男13例、女5例,平均年龄为28.5(18~38)岁;受伤至手术平均时间为1.5(0.4~2.0)d;在跟腱断裂处采取横切口,平均长度为3.5(3~5)cm。术后1年随访时,采用美国足踝外科协会(American Orthopaedic Foot and Ankle Society,AOFAS)踝-后足评分系统、跟腱完全断裂评分系统(achilles tendon total rupture score,ATRS)及Amer-Lindholm评分评价手术疗效,并对比患者两侧的小腿周径。结果所有患者手术切口一期愈合,均未发生神经、血管损伤等并发症。18例患者获得完全随访,随访时间为12~18个月,平均(14.25±4.00)个月。术后1年随访时,患者的AOFAS评分为(95.62±2.05)分;ATRS评分为(82.56±3.71)分;患者小腿周径患侧为(37.72±5.16)cm、健侧为(37.80±2.65)cm,两侧比较差异无统计学意义(P>0.05)。按Amer-Lindholm评分评价,本组疗效优15例、良3例、差0例,优良率为100.00%(18/18)。结论对于急性闭合性跟腱断裂,采用自制带孔克氏针卵圆钳辅助微创缝合,创伤小,并发症少,恢复快,效果确切。