疏肝健脾方对腹泻型肠易激综合征大鼠多巴胺信号通路结肠黏膜吸收功能的影响

[目的] 探讨疏肝健脾方对腹泻型肠易激综合征(D-IBS)模型大鼠结肠黏膜吸收功能的影响。[方法] 将体质量(200±20)g 雄性SD大鼠随机分为D-IBS模型组、疏肝健脾方治疗组和正常对照组,经过造模及疏肝健脾方治疗后,采用短路电流技术体外测定各组大鼠结肠黏膜的短路电流变化,并观察多巴胺(DA)、去甲肾上腺素(NE)和疏肝健脾方对大鼠结肠黏膜短路电流的影响。[结果] D-IBS模型组较正常组大鼠基础短路电流值略高,但差异无统计学意义(P>0.05);NE可引起大鼠结肠黏膜短路电流下降,且D-IBS模型组较正常组下降幅度明显增加(P<0.05);经疏肝健脾方治疗后,治疗组较模型组对DA 引起的最大短路电流变化明显减小(P<0.05)。[结论] DA可引起D-IBS模型大鼠结肠黏膜吸收活动增强,疏肝健脾方能通过改善D-IBS大鼠对DA的反应性而发挥其改善肠道吸收功能的作用。     

伽玛刀联合长春瑞滨、顺铂治疗局部晚期肺癌疗效观察简

目的：探讨体部伽玛刀联合长春瑞滨、顺铂治疗局部晚期非小细胞肺癌的临床疗效及不良反应。方法：自2008年1月-2010年7月,对101例非小细胞肺癌患者按治疗方法分为伽玛刀联合长春瑞滨、顺铂（联合组）52例和单纯应用长春瑞滨、顺铂（对照组）49例,比较两组治疗后的近期疗效、生存期及不良反应。结果：联合组、对照组有效率分别为82．69％和53．06％,两组1年生存率分别为69．23％,42．86％。联合组的急性放射性肺损伤发生率11．54％,急性放射性食管损伤发生率9．62％,均为1—2度。两组的血液毒性主要表现为白细胞下降,另外还合并有恶心、呕吐等,联合组发生几率明显高于对照组,但经过对症治疗均能顺利完成治疗。结论：伽玛刀联合长春瑞滨、顺铂治疗能显著提高局部晚期肺癌患者的近期疗效、生存时间;白细胞下降、恶心、呕吐等不良反应较单纯化疗组也明显增加,有部分患者还会出现急性放射性肺损伤,急性放射性食管损伤,但经过对症处理基本恢复正常不影响治疗。     

我国短缺药品现状调查分析

目的:为解决我国短缺药品问题提供参考。方法:采用文献调研、问卷调研(10省市共177家医疗机构)与实地考察(3家药品流通企业)方式对我国短缺药品现状进行综合分析。结果与结论:调研得到284种涉及短缺的药品,属于《国家基本药物目录》的198种,属于《国家基本医疗保险和工伤保险药品目录》的222种,属于《社区卫生服务机构用药参考目录》的104种,且几乎覆盖全部治疗领域。分析表明我国药品短缺现象确实存在,但多为综合原因引起的局部短缺,与我国医药卫生领域生产和流通环节"多小散乱"的格局和行业恶性竞争有直接联系。     

降纤酶治疗急性脑梗死的短期效果及对血浆纤维蛋白原的影响

目的：探讨降纤酶治疗急性脑梗死的短期效果及对血浆纤维蛋白原的影响。方法：收集2012年5月—2015年3月收治的84例急性脑梗死患者,均采用脑康复、脑复素等药物治疗,将患者随机分为试验组42例,同时给予降纤酶治疗;对照组42例,同时给予安慰剂治疗。观察患者疗效、神经功能缺损评分、血浆纤维蛋白原水平和凝血功能变化情况。结果：试验组总有效率为95.24%（40/42）,高于对照组的73.81%（31/42,P＜0.05）。治疗后,试验组神经功能缺损评分、血浆纤维蛋白原水平均低于对照组和治疗前（P＜0.05）,但两组患者治疗前后的凝血功能无明显变化。试验组不良反应发生率为9.52%（4/42）,低于对照组的26.19%（11/42,P＜0.05）。结论：降纤酶治疗急性脑梗死的短期效果较好,而且能改善患者神经功能缺损评分和血浆纤维蛋白原水平,对凝血功能无明显影响。     

Effect of Volume Fraction of Reinforcement on Microstructure and Mechanical Properties of In Situ (Ti,Nb)B/Ti2AlNb Composites with Tailored Three-Dimensional Network Architecture

The mechanical properties of (Ti, Nb)B/Ti₂AlNb composites were expected to improve further by utilizing spark plasma sintering (SPS) and inducing the novel three-dimensional network architecture. In this study, (Ti, Nb)B/Ti₂AlNb composites with the novel architecture were successfully fabricated by ball milling the LaB₆ and Ti₂AlNb mixed powders and subsequent SPS consolidation. The influence of the (Ti, Nb)B content on the microstructure and mechanical properties of the composites was revealed by using the scanning electron microscope (SEM), transmission electron microscopy (TEM) and electronic universal testing machine. The microstructural characterization demonstrated that the boride crystallized into a B27 structure and the α₂-precipitated amount increased with the (Ti, Nb)B increasing. When the (Ti, Nb)B content reached 4.9 vol%, both the α₂ and reinforcement exhibited a continuous distribution along the prior particle boundaries (PPBs). The tensile test displayed that the tensile strength of the composites presented an increasing trend with the increasing (Ti, Nb)B content followed by a decreasing trend. The composite with a 3.2 vol% reinforcement had the optimal mechanical properties; the yield strengths of the composite at 25 and 650 °C were 998.3 and 774.9 MPa, showing an 11.8% and 9.2% improvement when compared with the Ti₂AlNb-based alloy. Overall, (Ti, Nb)B possessed an excellent strengthening effect and inhibited the strength weakening of the PPBs area at high temperatures; the reinforcement content mainly affected the mechanical properties of the (Ti, Nb)B/Ti₂AlNb composites by altering the α₂-precipitated amount and the morphology of (Ti, Nb)B in the PPBs area. Both the continuous precipitation of the brittle α₂ phase and the agglomeration of the (Ti, Nb)B reinforcement dramatically deteriorated the mechanical properties.     

Fault Current Limitation in Electrical Power Networks Containing HTS Cable and HTS Fuse

Numerical calculations of parameters of an electrical power network where an HTS fuse is used as a fault current limiting device have been done. The calculations were performed for networks containing different types of HTS cables as well. The design of HTS fuse was developed based on the numerical calculation for the network-rated parameters considering the special types 2G HTS tape characteristics. The distinctive feature of these tapes is the minimal thickness (about 30 µm) of the substrate at the critical current 450–600 A. The tests were performed at a voltage of 1 kV and demonstrated the ability of circuit breaking at fault currents about 3–4 kA. A comparison of experimental results with the calculations allows us to conclude that the HTS fuse of this design can operate as a fault current limiting device in electrical power networks at various rated voltage levels.     

多重荧光标记STR-PCR技术在骨髓移植后植入状态监测中的应用

目的建立骨髓移植后植入状态监测的多重荧光标记短串联重复序列聚合酶链反应（STR-PCR）检测方法,为骨髓移植病人移植疗效评价及干预治疗提供可靠依据。方法于移植前、移植后7 d～3个月不同时间采集3例供受者静脉及骨髓血样,提取DNA作为模版,用多重荧光标记STR-PCR方法检测其基因型。结果2例供受者HLA-A、B、DRB1等6个等位基因完全相合病人骨髓移植后分别于第35天和3个月转为完全供者型,1例HLA半相合母子移植病人持续未植入,移植后第7、28天STR-PCR分析为受者基因型。结论荧光标记STR-PCR技术是骨髓移植后植入状态监测的有效方法,对移植效果有预测作用。     

ATX-shRNA表达质粒对肝癌细胞体外增殖和运动能力的影响

目的 研究ATX基因短发夹状RNA(shRNA)质粒表达载体对人MHCC-97肝癌细胞ATX基因表达和增殖、运动能力的抑制作用.方法 应用RT-PCR检测转染后肝癌细胞ATX mRNA的表达,同时应用MTT、细胞运动、侵袭实验检测其对人MHCC-97肝癌细胞增殖、侵袭、运动能力的影响.结果 ATX-shRNA表达载体可以有效的抑制人MHCC-97肝癌细胞中ATX基因的表达,使ATX基因的mRNA表达量显著下降,以转染后第四天下降最明显,并且转染后细胞增殖、侵袭、运动能力均减弱.结论 ATX-shRNA表达载体能有效地抑制ATX基因表达.     

一位自杀博主遗言评论留言的主题分析

目的:描述社交媒体中负向情绪的表达,探讨其与浏览者自杀风险的关系。方法:选取抑郁症自杀者"走饭"遗言微博下的10582条留言,利用NVivo11 Pro软件,由1名资深社会工作者对留言进行理解,建立树状节点,根据留言所含情绪进行留言的编码分类,经由另1名社工进行复查,产生分歧的留言由心理咨询师进行裁定。利用N11软件词频分析功能,统计留言中高频出现的词语及其频率。结果:微博留言者中表述自己患有抑郁症者占9%;表达自杀意念者占14%;负向表达留言占77%。词频统计发现"想死"、"杀"、"死了"、"离开"、"自杀"为高频的自杀相关关键词。结论:高自杀风险者聚集在该微博留言区,大量表达负性情绪,可能通过情绪传染对浏览者自杀风险产生影响。