S[a,b]类中边界Nevanlinna-Pick插值(Ⅱ)

继续作者最近的研究,用所谓的Hankel向量方法建立S[a,b]函数类中带边界插值数据的Nevanlinna-Pick插值问题与[a,b]上的某种带约束条件的Hausdorff矩量问题之间解集之间明确的一一对应关系.通过N[a,b]函数类与S[a,b]函数类之间的联系,从而由BNP(N[a,b])问题的可解性准则和解的参数化描述获得BNP(S[a,b)问题的可解性准则和解的参数化表示.     

N[a,b]类中边界Nevanlinna-Pick插值(I)

用所谓的Hankel向量方法求解N[a,b]函数类中带边界插值数据的Nevanlina-Pick插值(BNP(N[a,b]))问题,并建立BNP(N[a,b])问题与[a,b]上的某种带约束条件的Hausdorff矩量问题之间等价的可解条件以及解之间明确的一一对应关系.这使得当BNP(N[a,b])问题有多解时,能通过带约束条件的矩量问题的可解性准则和解获得BNP(N[a,b])问题的可解性准则和解的参数化描述,而在唯一解的情况下,通过BNP(N[a,b])问题解的存在唯一性准则和唯一解来获得带约束条件的     

Split intein facilitated tag affinity purification for recombinant proteins with controllable tag removal by inducible auto-cleavage

Purification tags are robust tools that can be used to purify a variety of target proteins. However, tag removal remains an expensive and significant issue that must be resolved. Based on the affinity and the trans-splicing activity between the two domains of Ssp DnaB split-intein, a novel approach for tag affinity purification of recombinant proteins with controllable tag removal by inducible auto-cleavage has been developed. This system provides a new affinity method and avoids premature splicing of the intein fused proteins expressed in host cells. The affinity matrix can be reused. In addition, this method is compatible with his-tag affinity purification technique. Our methods provide the insights for establishing a novel recombinant protein preparation system.     

无创正压通气治疗COPD 合并肺源性心脏病的疗效及对血浆C反应蛋白和脑钠素水平的影响

目的 探讨无创正压通气对慢性阻塞性肺疾病（COPD）合并肺源性心脏病的疗效和对患者血浆C 反应蛋白（CRP）和脑钠素（BNP）水平的影响。方法 将2012 年1 月到2014 年1月收治的120 例COPD 急性加重期合并肺源性心脏病患者随机分为观察组（60 例）和对照组（60 例）,对照组给予常规治疗,观察组在此基础上给予无创正压通气治疗。治疗前和治疗3d 后分别进行动脉血气分析,比较患者血pH 值、PaO2、PaCO2和动脉血氧饱和度（SaO2）在治疗前后的改变,并监测治疗前后血浆CRP和BNP 水平的改变。结果 治疗3d 后,两组患者的pH 值、PaO2、SaO2均较治疗前明显升高,PaCO2较治疗前明显降低,而观察组患者治疗后的动态血气分析指标的改善情况明显优于对照组,均有统计学差异（均P＜0.05）。两组患者的血浆CRP 和BNP 水平均较治疗前明显降低,而观察组患者治疗后的血浆CRP 和BNP 水平明显低于对照组,均有统计学差异（均P＜0.05）。结论 无创正压通气治疗COPD 合并肺源性心脏病,能够有效改善血气指标,提高SaO2和PaO2,同时降低血浆CRP 和BNP 的水平,值得在临床推广应用。     

Applications of Danishefsky’s dienes in asymmetric Oxo-Diels-Alder reactions

Applications of Danishefsky’s dienes in catalytic asymmetric hetero-Diels-Alder (AHDA) reactions or specifically, their asymmetric Oxo-Diels-Alder (AOxo-DA) reactions with appropriate dienophiles are highlighted in detail, including the preparation of catalysts with discussion from a mechanistic points of view. Danishefsky’s dienes are effective and useful compounds for the synthesis of optically active six-membered rings such as dihydropyrones, dihydropyridones and dihydropyrans. Due to the broad range of the overall subject, we have limited ourselves, to the recent developments in the utility of Danishefsky’s dienes in the reaction with carbonyl compounds (aldehydes, ketones and 1,2-dicarbonyl compounds) in asymmetric Oxo-Diels-Alder (AOxo-DA) reactions.     

高剂量瑞芬太尼对冠心病无痛胃镜检查患者循环系统及cTnI、BNP的影响

本文旨在探讨高剂量瑞芬太尼对冠心病无痛胃镜检查患者循环系统及心肌损伤的影响。无痛胃镜检查的冠心病患者96例随机分为LR组(丙泊酚+瑞芬太尼0.2μg·kg^-1,n=48)和HR组(丙泊酚+瑞芬太尼0.5μg·kg^-1,n=48)。比较2组睫毛反射消失时间、胃镜检查时间、苏醒时间及丙泊酚用量,观察检查前(T 0)、检查开始即刻(T 1)、检查开始后5 min(T 2)、10 min(T 3)、检查结束即刻(T 4)SBP、HR、RPP及ST段、T波变化,并检测2组胃镜检查前和结束时cTnI、BNP等指标。结果显示,HR组睫毛反射消失时间、胃镜检查时间、丙泊酚用量低于LR组(P<0.05);T 3、T 4时HR组SBP、HR及RPP低于LR组(P<0.05);HR组T1、T2时ST段与T波改善情况优于LR组(P<0.05);HR组检查后cTnI、BNP水平低于LR组(P<0.05);HR组术中一般体动反应发生率低于LR组(P<0.05)。表明0.5μg·kg^-1瑞芬太尼复合丙泊酚用于冠心病无痛胃镜检查麻醉效果满意,对患者循环系统及cTnI、BNP的影响较小。     

慢性心力衰竭患者血清CA125水平及其与BNP的相关性研究

目的评估慢性心力衰竭患者血清CA125水平,研究血清CA125与B型脑钠肽(BNP)之间的相关性.方法选择住院患者64例,男29例,女35例,年龄55~83(68±15)岁.据纽约心功能(NYHA)分级分为NYHAI~II、NYHAIII与NYHAIV级3组,血清CA125及BNP均在入院24h测定.结果血清CA125水平NYHAI/II级组为(21.6±6.2)U/ml,NYHAIII级组为(35.0±6.7)U/ml,NYHAIV级组为(59.0±24.0)U/ml.NYHAIV级和NYHAIII级组CA125均高于NYHAI~II级组(t=7.3、6.8,均P<0.01).相关分析显示血清CA125与BNP呈正相关(r=0.77,P<0.01).结论血清CA125反映慢性心力衰竭的严重程度,CA125与BNP相关,两者结合可作为心力衰竭的重要诊断依据.