大学生逃课行为和心理控制点的归因研究

目的通过对大学生逃课行为进行调查和归因研究，来探讨大学生逃课的心理和社会原因。方法采用问卷调查和群体访谈研究方法。结果内外控制个人特征与逃课现象存在显著相关，但男女生的内外控制不存在显著差异；性别与逃课次数是相关的。结论男性比女性更容易逃课；高年级存在更严重的逃课现象；学生群体效应也是不能忽视的原因。由此，学校、老师、学生应关注逃课现象，针对其原因，对大学生逃课行为加强教育和引导，尤其是心理控制点方面的人格完善问题。     

许叔微《伤寒九十论》对《伤寒论》的阐幽发微及评说

许叔微对张仲景《伤寒论》阐幽发微．认为“伤寒应以真气为主”，“伤寒应不避履夜．即宜便治”，“伤寒之邪传变．必循六经次第”．“伤末、杂病脉证顺逆有异”等，较好地体现了《伤寒论》研究的学术水平。笔者对许叔微的学术见解进行了评说。     

NF-κB、G、D细胞在慢性胃炎脾胃湿热证患者胃窦粘膜内表达的意义

探讨NF-κB、G、D细胞在慢性胃炎脾胃湿热证患者胃窦粘膜内表达的相关性.采用免疫细胞化学方法检测脾胃湿热组、脾胃气虚组和正常对照组胃窦粘膜内NF-κB、G、D细胞.结果：正常对照组NF-κB呈弱表达.脾胃湿热组NF-κB呈高表达,较脾胃气虚组和正常对照组表达增强,且有显著性差异（P＜0.05和P＜0.01）.脾胃湿热组G细胞数量与脾胃气虚组和正常对照组相比无显著性差异（P＞0.05）;但D细胞数量则显著低于其它2组（P＜0.01）,G/D细胞比值高于其它2组（P＜0.01）.结论：脾胃湿热组NF-κB的表达增强,G/D细胞比值增大.可能与较高的Hp感染率及其他致病因素有关.     

龙虎芪黄汤对小鼠化学性肝损伤的保护作用

观察龙虎芪黄汤对四氯化碳（CCl4）、D-半乳糖胺（D-GaIN）所致小鼠急性化学性肝损伤影响,结果表明龙虎芪黄汤可显著降低由CCl4、D-GaIN所致小鼠血清ALT、AST及肝组织MDA的升高,明显提高肝组织SOD的含量,能明显改善CCl4、D-GaIN所致的肝组织病理学损伤,而对肝组织NO、TNF-α含量则无明显影响.说明龙虎芪黄汤对CCl4、D-GaIN所致小鼠急性化学性肝损伤可起到保肝降酶、抗脂质过氧化等作用.     

移动互联网在远程动态心电监测系统中的应用

以移动互联网作为远程动态心电监护系统的数据传输工具，使病人随时随地都可以做心电监测，实现真正意义上的远程动态心电监测。文章简述了该远程动态心电监测系统，并详细讨论了移动互联网如何实现心电数据传输和反馈诊断信息。     

miR-383调控血管生成因子VEGFA的表达并抑制血管生成

目的 探讨miR-383对血管生成的影响及分子机制。 方法 通过生物信息学数据库进行预测,寻找miR-383调控的靶基因,挑选与血管生成相关的靶基因作为候选基因,采用荧光素酶报告基因检测系统进行验证。利用实时荧光定量PCR(qPCR)和Western-blot等实验证实miR-383对候选基因表达的靶向调控; 通过体外血管内皮细胞成管实验检测miR-383对血管生成的影响。 结果 生物信息学预测显示,miR-383靶向多个与血管生成相关的基因; 荧光素酶报告基因实验证实,miR-383可通过结合血管内皮生成因子(VEGFA)基因3''-非翻译区(3''-UTR)而抑制其表达; 过表达miR-383并不影响VEGFA的mRNA转录水平,而只是在蛋白水平下调VEGFA表达; 体外血管生成实验表明,miR-383所介导的VEGFA表达下调可明显抑制血管生成。 结论 miR-383可通过靶向结合VEGFA基因的3''-UTR,抑制其翻译效率而下调VEGFA的表达,并抑制内皮细胞血管生成能力。     

Fine structure of interleukin 18 (IL-18) receptor-immunoreactive neurons in the retrosplenial cortex and its changes in IL18 knockout mice

Interleukin 18 (IL-18) participates in the inflammatory immune response of lymphocytes. Delay in learning or memory are common in the IL-18 knockout mouse. Many IL-18-immunoreactive neurons are found in the retrosplenial cortex (RSC) and the subiculum. These neurons also contain the IL-18 receptor. We determined the location and the ultrastructure of the IL-18 receptor-immunoreactive neurons in the RSC and observed changes in the IL-18 receptor-immunoreactive neurons of the IL-18 knockout mouse. The IL-18 receptor-immunoreactive neurons were found specifically in layer V of the granular RSC. They were medium-sized neurons with a light oval nucleus and had little cytoplasm with many free ribosomes, rough endoplasmic reticulum and many mitochondria, but no Nissl bodies. The number of axosomatic terminals was about six per section. The IL-18 receptor-immunoreactive neurons were not found in the RSC in the IL-18 knockout mouse at 5 or 9 weeks of age. However, many small electron-dense neurons were found in layer V. Both the nucleus and cytoplasm were electron-dense, but not necrotic. The mitochondria and rough endoplasmic reticulum were swollen. The IL-18 receptor-immunoreactive neurons were presumed to be degenerating. The degeneration of the IL18-receptor-immunoreactive neurons in the RSC may cause the abnormal behaviors of the IL-18 knockout mice.     

Influence Factors and Prediction Model of Bond Strength of Tunnel Fireproof Coating under Freeze–Thaw Cycles

The freeze–thaw resistant performance of a tunnel fireproof coating (TFC) has an important impact on bonding property and durability. The influence of redispersible emulsion powder, polypropylene fiber and air-entraining agent on TFCs was studied. Transverse fundamental frequency and ultrasonic sound velocity were used to evaluate the damage degree of TFC, and the mechanism was revealed by SEM and pore structure. The results show that the most beneficial effect on bond strength of TFC is redispersible emulsion powder, followed by air-entraining agent, and then polypropylene fiber. After freeze–thaw cycles, the cumulative pore volume of micropores in the TFC increases obviously, while the porosity of macropores does not change significantly. A prediction model was proposed, which can calculate the bond strength from the damage degree of TFC under freeze–thaw cycles. The achievement can promote the application of TFC in cold regions.     

成年大鼠延髓薄片制备的改良方法

目的:建立一种适用于膜片钳记录研究的成年大鼠延髓薄片制备方法。方法:用改制的注射器将延髓和上颈髓段从离断的椎管中直接吹出;采用水平切的方式制备延髓薄片;记录三叉神经脊束核尾侧亚核(Vc)神经元的自发放电和诱发放电活动。结果:分离得到的延髓和上颈髓标本光滑完整;水平切的延髓薄片较好地保持了Vc的形态学结构和神经元活性,可较好地记录到Vc神经元自发的兴奋性突触后电流和诱发的双脉冲抑制活动。结论:本方法操作简单,取材快速,延髓薄片外形完整且能保持神经元活性,适用于成年大鼠Vc的膜片钳研究。