目的探讨输注不同靶控浓度顺式阿曲库铵对肥胖患者胃袖状切除手术的影响。方法选取拟全身麻醉下行腹腔镜胃袖状切除术的肥胖患者105例,随机分为3组:持续泵注顺式阿曲库铵低靶控浓度组(1.5μg/mL,A组)、中靶控浓度组(2.0μg/mL,B组)和高...目的探讨输注不同靶控浓度顺式阿曲库铵对肥胖患者胃袖状切除手术的影响。方法选取拟全身麻醉下行腹腔镜胃袖状切除术的肥胖患者105例,随机分为3组:持续泵注顺式阿曲库铵低靶控浓度组(1.5μg/mL,A组)、中靶控浓度组(2.0μg/mL,B组)和高靶控浓度组(2.5μg/mL,C组),每组35例。记录3组患者的年龄,体重指数,理想体重,美国麻醉医师协会分级(American Society of Anesthesiologist,ASA)分级,手术时间,睁眼时间,手术30、60 min时的脑电双频指数(bispectral index,BIS)值,在四个成串刺激(train of four stimulation,TOF)达到0.25(T1)、0.75(T2)、和0.9(T3)的时间,同时记录拔除气管导管时的TOF;记录手术结束时及拔管后10 min的心率(heart rate,HR)、平均动脉压(mean arterial blood pressure,MAP);记录拔管后10 min的呼吸频率、脉搏血氧饱和度(saturation of pulse oximetry,SpO_(2))。结果3组患者的年龄,BMI指数,理想体重,ASA分级,手术时间,手术30、60 min时的BIS值,手术结束时及拔管后10 min的HR、ABP,拔管后10 min的呼吸频率、SpO_(2)差异无统计学意义(P>0.05)。与A组比较,B、C两组患者睁眼时间、T1、T2、T3时间显著延长;与B组比较,C组患者睁眼时间、T1、T2、T3时间显著延长(P<0.05)。结论输注低靶控浓度肌松药用于行腹腔镜胃袖状切除术的肥胖患者,不仅缩短患者术后肌松恢复时间,且有利于肥胖患者术后快速复苏。展开更多
通过研究废弃混凝土再生粉取代水泥(0、10%、20%、30%、40%、50%取代)对超高性能混凝土(Ultra high performance concrete,UHPC)性能的影响,验证使用废弃混凝土再生粉制备UHPC的可行性。结果表明,再生粉取代水泥降低了UHPC基体的工作性...通过研究废弃混凝土再生粉取代水泥(0、10%、20%、30%、40%、50%取代)对超高性能混凝土(Ultra high performance concrete,UHPC)性能的影响,验证使用废弃混凝土再生粉制备UHPC的可行性。结果表明,再生粉取代水泥降低了UHPC基体的工作性能和抗折强度,但使用50%的再生粉取代水泥制备的UHPC基体28 d抗压强度与基准组相当;使用废弃混凝土再生粉制备UHPC基体具有较好的抗渗性能;随再生粉取代量的增加,UHPC基体的早期自收缩下降;XRD分析结果表明使用废弃混凝土再生粉取代水泥并不改变水化产物的种类;但掺加废弃混凝土再生粉能明显缩短UHPC基体的水化诱导期,降低累积释放热。除此之外,使用废弃混凝土再生粉制备的UHPC基体能耗显著降低。展开更多
Boron resources are abundant in the Da Qaidam Salt Lake of the Qaidamu basin in China, which has generated significant attention due to the presence of polyborate species in brine from this lake. In this study, Raman ...Boron resources are abundant in the Da Qaidam Salt Lake of the Qaidamu basin in China, which has generated significant attention due to the presence of polyborate species in brine from this lake. In this study, Raman spectroscopy was used to investigate the existing form of boron in brine during evaporation. MgO·2B2O3 -H2O, MgO·2B2O3 -MgCl2 -H2O, and MgO·2B2O3 -MgSO4 - H2O solutions were also studied to determine the influence of boron concentration, pH, and electrolytes on the borate speciation from brine. The mononborates B(OH)3 and B(OH)4^- were found to be the only forms present in natural salt lake brine. Brine evaporation promoted the formation of the polyborate anions B3O3(OH)4^-,B5O6(OH)4^-, and B6O7(OH)6^2- and also promoted the disappearance of the B(OH)4^- ion from brine at boron concentrations of more than 11 g/L B2O3. The pentaborate ion B5O6(OH)4^- was sensitive to the solution pH and appeared only at pH values less than 8.0. Meanwhile, the hexaborate ion B6O7(OH)6^2- was observed to be more dependent on the electrolyte magnesium chloride due to its special properties, such as promoting boron accumulation, lowering solution pH, and also its strong affinity for water molecules, which were all beneficial for the polymerization of borate ions in brine. Interaction mechanisms between polyborate anions during evaporation are also proposed herein.ake;evaporation;polyborate species;interaction mechanism.展开更多
文摘目的探讨输注不同靶控浓度顺式阿曲库铵对肥胖患者胃袖状切除手术的影响。方法选取拟全身麻醉下行腹腔镜胃袖状切除术的肥胖患者105例,随机分为3组:持续泵注顺式阿曲库铵低靶控浓度组(1.5μg/mL,A组)、中靶控浓度组(2.0μg/mL,B组)和高靶控浓度组(2.5μg/mL,C组),每组35例。记录3组患者的年龄,体重指数,理想体重,美国麻醉医师协会分级(American Society of Anesthesiologist,ASA)分级,手术时间,睁眼时间,手术30、60 min时的脑电双频指数(bispectral index,BIS)值,在四个成串刺激(train of four stimulation,TOF)达到0.25(T1)、0.75(T2)、和0.9(T3)的时间,同时记录拔除气管导管时的TOF;记录手术结束时及拔管后10 min的心率(heart rate,HR)、平均动脉压(mean arterial blood pressure,MAP);记录拔管后10 min的呼吸频率、脉搏血氧饱和度(saturation of pulse oximetry,SpO_(2))。结果3组患者的年龄,BMI指数,理想体重,ASA分级,手术时间,手术30、60 min时的BIS值,手术结束时及拔管后10 min的HR、ABP,拔管后10 min的呼吸频率、SpO_(2)差异无统计学意义(P>0.05)。与A组比较,B、C两组患者睁眼时间、T1、T2、T3时间显著延长;与B组比较,C组患者睁眼时间、T1、T2、T3时间显著延长(P<0.05)。结论输注低靶控浓度肌松药用于行腹腔镜胃袖状切除术的肥胖患者,不仅缩短患者术后肌松恢复时间,且有利于肥胖患者术后快速复苏。
基金国家自然科学基金(51608409)2016年中山市新型研发机构专项(重大研发平台建设补贴2016F2FC0008)+2 种基金广东省中山市重大科技专项(2017A1021)2016年广东省省级科技计划项目(产学研合作项目2016A090924002)National Key Research and Development Program of China(2016YFC0305101)
文摘通过研究废弃混凝土再生粉取代水泥(0、10%、20%、30%、40%、50%取代)对超高性能混凝土(Ultra high performance concrete,UHPC)性能的影响,验证使用废弃混凝土再生粉制备UHPC的可行性。结果表明,再生粉取代水泥降低了UHPC基体的工作性能和抗折强度,但使用50%的再生粉取代水泥制备的UHPC基体28 d抗压强度与基准组相当;使用废弃混凝土再生粉制备UHPC基体具有较好的抗渗性能;随再生粉取代量的增加,UHPC基体的早期自收缩下降;XRD分析结果表明使用废弃混凝土再生粉取代水泥并不改变水化产物的种类;但掺加废弃混凝土再生粉能明显缩短UHPC基体的水化诱导期,降低累积释放热。除此之外,使用废弃混凝土再生粉制备的UHPC基体能耗显著降低。
基金National Natural Science Foundation for the Youth(No.21501187)Qaidam Salt Lake Chemical Scientific Research Joint Foundation of China(No.U1607103)Light of the West Talent Program of the Chinese Academy of Sciences
文摘Boron resources are abundant in the Da Qaidam Salt Lake of the Qaidamu basin in China, which has generated significant attention due to the presence of polyborate species in brine from this lake. In this study, Raman spectroscopy was used to investigate the existing form of boron in brine during evaporation. MgO·2B2O3 -H2O, MgO·2B2O3 -MgCl2 -H2O, and MgO·2B2O3 -MgSO4 - H2O solutions were also studied to determine the influence of boron concentration, pH, and electrolytes on the borate speciation from brine. The mononborates B(OH)3 and B(OH)4^- were found to be the only forms present in natural salt lake brine. Brine evaporation promoted the formation of the polyborate anions B3O3(OH)4^-,B5O6(OH)4^-, and B6O7(OH)6^2- and also promoted the disappearance of the B(OH)4^- ion from brine at boron concentrations of more than 11 g/L B2O3. The pentaborate ion B5O6(OH)4^- was sensitive to the solution pH and appeared only at pH values less than 8.0. Meanwhile, the hexaborate ion B6O7(OH)6^2- was observed to be more dependent on the electrolyte magnesium chloride due to its special properties, such as promoting boron accumulation, lowering solution pH, and also its strong affinity for water molecules, which were all beneficial for the polymerization of borate ions in brine. Interaction mechanisms between polyborate anions during evaporation are also proposed herein.ake;evaporation;polyborate species;interaction mechanism.
