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A sort of resin substrate for anion separation by HPIC has been prepared and the chromatographic performance was investigated. The HPIC resin for anion IC has an inert crosslinked polystyrene microsphere core with sulfonic groups on the surface. These sulfonic groups provide an opportunity to attach the totally porous quaternary aminated latex particles to the surface of the microspheres. The aminated latex particles are strongly held to the surface by the coulombic force leading to a agglomerated microspheric... A sort of resin substrate for anion separation by HPIC has been prepared and the chromatographic performance was investigated. The HPIC resin for anion IC has an inert crosslinked polystyrene microsphere core with sulfonic groups on the surface. These sulfonic groups provide an opportunity to attach the totally porous quaternary aminated latex particles to the surface of the microspheres. The aminated latex particles are strongly held to the surface by the coulombic force leading to a agglomerated microspheric resin. The physico-chemical properties of the copolymer microspheres and the latex particles,their degree of ionization and the particle size ratio of the cation and anion exchangers determine the separation ability and column efficiency throughout the HPIC process.The agglomerated microsphere performs an excellent mode of choice for several common inorganic ions with retention sequence as follows: F- 用粒径约0.5微米季胺化单分散交联聚苯乙烯胶乳与粒径为5~30微米磺化交联聚苯乙烯共聚物微球藉库伦力附聚得到了阴离子交换树脂微球,并对磺化深度,基球和胶乳的粒径比以及交联度等对阴离子交换树脂附聚微球色谱性能的影响进行了分析。用这种阴离子交换树脂附聚微球作为HPIC分离柱的填料;用自制的全多孔强阳离子交换树脂YSG-SO_3H为抑制柱填料,仅用10厘米长的分离柱在约27分钟内即可使F~-、Cl~-、No_2~-、HPO_4~-、Br~-、No_3~-、及SO_4~-等阴离子混合样按顺序全分离。 Echocardiographic measuraments -were carried out in 53 patients with chronic rheumatic heart disease (RHD) during labor and delivery .Ten patients were delivered b-y cesarean section and tkree patients were delivered vaginally.Only mild alterations In maternal cardiovascular function were encountered undergoing cesarean section under epidural anesthesia,excepting a transient decline in blood pressure. A significant incre-, ase in blood pressure,heart rate and systemic vascular resistance were observed in t-he... Echocardiographic measuraments -were carried out in 53 patients with chronic rheumatic heart disease (RHD) during labor and delivery .Ten patients were delivered b-y cesarean section and tkree patients were delivered vaginally.Only mild alterations In maternal cardiovascular function were encountered undergoing cesarean section under epidural anesthesia,excepting a transient decline in blood pressure. A significant incre-, ase in blood pressure,heart rate and systemic vascular resistance were observed in t-he second stage of labor. A decrease in cardiac output was demonstrated at the same t-ime.Our results suggest that cesarean section as the mode of choice for delivery in pat- -, ients with, RHD is better than that of the vaginal delivery 本文用超声心动图对13例风湿性心脏病孕妇生产期的心脏及血流动力学变化进行了观察。包括10例剖宫产和3例自发性阴道分娩。结果表明除硬膜外麻醉引起血压暂时下降外,剖宫产对心功能的影响较小。而自发性阴道分娩可导致血压、心率和体循环血管阻力显著增加,心输出量下降,尤在第二产程时明显。提示风心病患者的生产方式以剖宫产似较自发性阴道分娩为好 Objective:To estimate an appropriate delivery time in patients with pre-eclampsia. Methods: One hundred sixty-three patients with pre-eclampsia delivered in our hospital from January 1993 to January 1999 were analyzed retrospectively. By gestational age, these women were divided into 2 groups: 32~36+ 6 weeks and ≥ 37 weeks. The incidences of cesarean sec-tion,neonatal asphyxia,neonatal survival,low birth weight and fetal distress were observed respectively. Results:The cesare-an section rate was 93.85 % in <... Objective:To estimate an appropriate delivery time in patients with pre-eclampsia. Methods: One hundred sixty-three patients with pre-eclampsia delivered in our hospital from January 1993 to January 1999 were analyzed retrospectively. By gestational age, these women were divided into 2 groups: 32~36+ 6 weeks and ≥ 37 weeks. The incidences of cesarean sec-tion,neonatal asphyxia,neonatal survival,low birth weight and fetal distress were observed respectively. Results:The cesare-an section rate was 93.85 % in < 37 weeks group or 85.71 % in ≥37 weeks group. There was no significant difference be-tween the 2 groups (F>0.05). The average birth weight in <37 weeks group was 2 173g,it was significantly lower than 3 130g in ≥37 weeks group (P'<0.05). There was a dramatically higher incidence of low birth weight in < 37 weeks group (36.76 %), compared with 8.82% in ≥37 weeks group (P<0.05);but no difference was found between the 2 groups in neonalal asphyxia incidences (8.87% and 9.80% ) and neonatal survival incidences (94.12% and 99.02% ). Fe-tal distress incidence in≥37 weeks group was 25 .49 % , and significantly higher than 11 .76 % in < 37 weeks group ( P < 0.05).Conclusion:For some refractory patients,their pregnancy should terminated at 32 gestational age,and the cesarean section is the delivery mode of choice in order to avoid severe complications of both mother and fetus. 目的:回顾分析1993年1月至1999年1月于我院分娩的先兆子(疒间)患者163例,评价先兆子(疒间)的适宜分娩时机。方法:按分娩孕周分为32~36~(+6)(未足月)及≥37周(足月)两组,分别比较两组的刮宫产率、新生儿存活率、窒息率以及低体重儿和胎窘的发生率。结果:未足月者及足月者两组的剖宫产率分别为93.85%、85.71%,二者差别无统计学意义(P>0.05)。未足月者新生儿平均出生体重2173g,低于足月者3130g(P<0.05),低体重儿发生率36.76%,高于足月者8.82%(P<0.05)。两组新生儿窒息率分别为8.82%、9.80%,存活率分别为94.12%、99.02%,均无显著性差异(P>0.05),而足月者胎窘发生率为25.49%,高于未足月者的11.76%(P<0.05)。结论:对先兆子(疒间)在积极治疗效果欠佳者,为避免严重的母儿并发症,终止妊娠时机可提前至32周,分娩方式首选剖宫产。
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