A novel operation of batch distillation-combination of varyingcolumn pressure and total reflux-total efflux is studiedexperimentally. In the operation, the product is accumulated at thetop of the column under total re...A novel operation of batch distillation-combination of varyingcolumn pressure and total reflux-total efflux is studiedexperimentally. In the operation, the product is accumulated at thetop of the column under total reflux and then drained off completely,and the column pressure is varying in the whole process. This processhas been industrialized successfully with large profits. Theconventional model of batch distillation is improved by this methodeffectively: the separation efficiency and the yield of product areincreased greatly, the operation time is shortened and the productioncost is cut down. Moreover, the amount of condensation water isdecreased and the over-high reboiler temperature is lowered.展开更多
目的探析胃液及外周血的总胆汁酸(total bile acid,TBA)水平对胆汁反流性胃炎(bile reflux gastritis,BRG伴有胃黏膜肠上皮化生(gastric intestinal metaplasia,GIM)的诊断效能。方法选取2020年6月至2022年6月临海市第二人民医院收治的...目的探析胃液及外周血的总胆汁酸(total bile acid,TBA)水平对胆汁反流性胃炎(bile reflux gastritis,BRG伴有胃黏膜肠上皮化生(gastric intestinal metaplasia,GIM)的诊断效能。方法选取2020年6月至2022年6月临海市第二人民医院收治的150例BRG患者作为研究对象,根据是否发生GIM分为观察组(GIM发生,n=89)和对照组(GIM未发生,n=61)。观察组中,又将28例BRG伴GIM作为不完全型GIM组,61例完全型GIM作为完全型GIM组。检测两组患者的胃液及外周血TBA,采用受试者操作特征(receiver operator characteristic,ROC)曲线分析胃液及外周血TBA水平在诊断BRG伴GIM的诊断效能。结果观察组胃液及外周血的TBA水平均显著高于对照组(P<0.05)。ROC分析显示,胃液TBA水平诊断BRG伴GIM的曲线下面积(area under the curve,AUC)为0.836,敏感度为81.97%,特异性为83.15%;外周血TBA水平诊断BRG伴GIM的AUC为0.753,敏感度为62.30%,特异性为82.02%。不完全型GIM组胃液及外周血TBA水平显著高于完全型GIM组(P<0.05)。ROC曲线分析结果显示,胃液TBA水平诊断BRG伴GIM患者不同分型的AUC为0.952,敏感度为89.47%,特异性为96.08%;外周血TBA水平诊断BRG伴GIM患者不同分型的AUC为0.766,敏感度为76.37%,特异性为80.39%。结论胃液及外周血TBA对BRG伴GIM及GIM不同分型均具有较好诊断效能,且外周血TBA检测的侵入性小,对于辅助人群诊断BRG伴GIM及GIM不同分型具有明显的现实意义。展开更多
文摘A novel operation of batch distillation-combination of varyingcolumn pressure and total reflux-total efflux is studiedexperimentally. In the operation, the product is accumulated at thetop of the column under total reflux and then drained off completely,and the column pressure is varying in the whole process. This processhas been industrialized successfully with large profits. Theconventional model of batch distillation is improved by this methodeffectively: the separation efficiency and the yield of product areincreased greatly, the operation time is shortened and the productioncost is cut down. Moreover, the amount of condensation water isdecreased and the over-high reboiler temperature is lowered.
文摘目的探析胃液及外周血的总胆汁酸(total bile acid,TBA)水平对胆汁反流性胃炎(bile reflux gastritis,BRG伴有胃黏膜肠上皮化生(gastric intestinal metaplasia,GIM)的诊断效能。方法选取2020年6月至2022年6月临海市第二人民医院收治的150例BRG患者作为研究对象,根据是否发生GIM分为观察组(GIM发生,n=89)和对照组(GIM未发生,n=61)。观察组中,又将28例BRG伴GIM作为不完全型GIM组,61例完全型GIM作为完全型GIM组。检测两组患者的胃液及外周血TBA,采用受试者操作特征(receiver operator characteristic,ROC)曲线分析胃液及外周血TBA水平在诊断BRG伴GIM的诊断效能。结果观察组胃液及外周血的TBA水平均显著高于对照组(P<0.05)。ROC分析显示,胃液TBA水平诊断BRG伴GIM的曲线下面积(area under the curve,AUC)为0.836,敏感度为81.97%,特异性为83.15%;外周血TBA水平诊断BRG伴GIM的AUC为0.753,敏感度为62.30%,特异性为82.02%。不完全型GIM组胃液及外周血TBA水平显著高于完全型GIM组(P<0.05)。ROC曲线分析结果显示,胃液TBA水平诊断BRG伴GIM患者不同分型的AUC为0.952,敏感度为89.47%,特异性为96.08%;外周血TBA水平诊断BRG伴GIM患者不同分型的AUC为0.766,敏感度为76.37%,特异性为80.39%。结论胃液及外周血TBA对BRG伴GIM及GIM不同分型均具有较好诊断效能,且外周血TBA检测的侵入性小,对于辅助人群诊断BRG伴GIM及GIM不同分型具有明显的现实意义。