腰椎三维有限元模型的建立及模拟高载荷环境的受力分析

目的建立飞行员腰椎三维有限元模型,证明模型与临床的一致性。方法通过建立飞行员腰椎三维有限元模型,模拟高+Gz的环境下腰椎受力情况,并结合48例飞行员临床腰椎X线损伤的情况分析。结果飞行员腰椎三维有限元模型模拟的腰椎应力损伤情况与临床x线表现一致,L1楔形变高发。结论腰椎三维有限元模型可模拟飞行员高+Gz的环境下腰椎受力状态。     

Structural basis of cargo recognitions for class V myosins

Class V myosins (MyoV), the most studied unconventional myosins, recognize numerous cargos mainly via the motor’s globular tail domain (GTD). Little is known regarding how MyoV-GTD recognizes such a diverse array of cargos specifically. Here, we solved the crystal structures of MyoVa-GTD in its apo-form and in complex with two distinct cargos, melanophilin and Rab interacting lysosomal protein-like 2. The apo-MyoVa-GTD structure indicates that most mutations found in patients with Griscelli syndrome, microvillus inclusion disease, or cancers or in “dilute” rodents likely impair the folding of GTD. The MyoVa-GTD/cargo complex structure reveals two distinct cargo-binding surfaces, one primarily via charge–charge interaction and the other mainly via hydrophobic interactions. Structural and biochemical analysis reveal the specific cargo-binding specificities of various isoforms of mammalian MyoV as well as very different cargo recognition mechanisms of MyoV between yeast and higher eukaryotes. The MyoVa-GTD structures resolved here provide a framework for future functional studies of vertebrate class V myosins.     

Cockett综合征伴下肢深静脉血栓的综合介入治疗

目的探讨介入治疗对Cockett综合征伴下肢深静脉血栓形成的临床疗效。方法回顾性分析我院2010年10月至2012年6月收治的73例Cockett综合征伴下肢深静脉血栓患者资料,采用血栓碎吸+经皮血管内球囊扩张+内支架置入术+辅助溶栓等血管介入技术进行综合性治疗。结果 73例中治愈42例,显效19例,有效12例,总有效率100%。本组患者术中、术后无并发症,2例溶栓过程中出现血尿、便血。随访6～12个月,中位时间9个月,支架通畅率96%(70/73),均未发现支架移位和变形。结论综合介入治疗是治疗Cockett综合征伴下肢深静脉血栓的一种安全、有效、微创的治疗手段,值得临床推广。     

Promoting Exercise Self-Efficacy With an Exergame

A new generation of exercise video games (exergames) shows promise as a tool to motivate and engage users in physical activity. However, little research has been conducted to examine whether exergames work equally well across diverse populations and contexts. Therefore, in the present study, the authors investigated the effects of an individual psychological difference factor and a specific contextual factor on the exercise experience using an exergame. They used the objective self-awareness theory as the theoretical underpinning. In a 2 (seeing the image of self on screen: seeing oneself vs. not seeing oneself) × 2 (body image dissatisfaction: low vs. high) between-subjects design experiment, the authors found significant interaction effects showing that the feature of seeing the image of self on screen provided by the exergame works positively for individuals with low body image dissatisfaction, yet works negatively for individuals with high body image dissatisfaction. The finding of the present study has significant implications for health professionals and individuals who use the new generation of exergames for physical activities.     

Detraditionalisation and attitudes to sex outside marriage in China

China has undergone massive socio-economic change over the past 30 years. In parallel, there have been huge changes in social and sexual mores. Until the end of the Mao era strict norms prevailed, with sex outside marriage widely regarded as immoral and unacceptable. Detraditionalisation theory describes the abandonment or reconfiguration of the socio-cultural traditions and has been explored widely in Western settings. This study aimed to explore its relevance for China through exploring attitudes towards premarital sex, extramarital sex, same-sex relations and sex work. We conducted semi-structured interviews with 212 men and women aged 18 to 39 in urban and rural areas of three provinces: Zhejiang, Guizhou and Yunnan. Analysis identified emerging themes. Results show varying degrees of acceptance of the four sexual behaviours, with premarital sex seen as common, homosexuality still regarded as unacceptable by the majority but considerable acceptance of commercial sex work as part of male business transactions and social life. China appears to be on a pathway of detraditionalisation with specific Chinese features. This study suggests that the concept of detraditionalisation applies well to non-Western contexts, but the path it takes is culture-specific and relatively unpredictable.     

Bioaccumulation of PBDE congener 2,2′,4,4′-tetrabromodiphenyl ether by Heterosigma akashiwo in response to different nutrient concentrations

Changes in the bioaccumulation of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) in the marine alga Heterosigma akashiwo (Raphidophyceae) were examined for different concentrations of nitrate (0, 128, and 512 μmol dm^?3) and phosphate (0, 8, and 32 μmol dm^?3) in the semi-continuous culture with 20% renewal rate. The BDE-47 content per cell and per culture, as well as the accumulated percentage of available BDE-47, presented a significant decreasing trend with the increase in nitrate and phosphate concentrations. The N-0 (4.0 × 10^?6 ng cell^?1) and P-0 (5.8 × 10^?6 ng cell^?1) treatments had significantly higher BDE-47 content per cell than other treatments. In comparison, the difference in BDE-47 per algal culture and accumulated percentage between the nitrate treatments or phosphate treatments was not as obvious as the BDE-47 content per cell. BDE-47 per cell presented significantly negative correlation with nitrate and phosphate concentrations, and the accumulated BDE-47 was in positive correlation with lipid content. log BAF_lip for BDE-47 in H. akashiwo ranged from 6.70 to 7.25. The results of this study indicate that variation in BDE-47 accumulation by H. akashiwo corresponds to the change in cellular lipid content induced by different nitrate and phosphate concentrations.     

超声引导经皮经肝穿刺胆管置管术治疗阻塞性黄疸的研究

目的 探讨超声引导经皮经肝穿刺胆管置管引流术(PTCD)治疗恶性肿瘤引起的阻塞性黄疸的临床应用价值.方法 对我院79例恶性肿瘤引起阻塞性黄疸的患者行超声引导PTCD治疗,术后观察患者生命体征、有无腹膜刺激征及出血症状,并记录胆汁引流量,监测置管后1周总胆红素的变化情况.结果 72例患者一次穿刺置管成功率达91.1%,5...     

复方南星止痛膏的顶空气相色谱指纹图谱研究

目的：建立复方南星止痛膏的顶空气相指纹图谱,全面评价其质量。方法：采用气相色谱法,色谱柱：HP-5MS（30m×0．25mm,0．25μm）,载气为氮气,流速：1mL·min^-1,分流比：5：1,FID检测器,程序升温,顶空进样。并对10批复方南星止痛膏挥发性成分指纹图谱进行相似度计算。结果：10批复方南星止痛膏指纹图谱中有6个共有峰,各峰分离度良好,样品间相似度均大于0．95。结论：本方法简便、准确、重现性好,可用于复方南星止痛膏的质量评价。