爆炸波对生物膜微观创伤的分子动力学分析

爆炸冲击波作用到人体胸部时，肺部会出现肺出血及肺水肿等症状，这是人体爆炸创伤的主要原因，深入研究很有必要。为了更好地理解爆炸创伤的机理，应研究冲击波与微观组织作用的力学过程，但具有一定的难度，本文先从基本的生物膜做起。本文运用分子动力学研究了冲击波对DPPC膜造成的损伤，通过停止活塞来控制冲击波的冲量，观察了冲击过程中膜的恢复情况。观察了不同冲量下冲击波经过膜后磷脂分子及其周围水分子分布，发现随着冲量增大，膜越来越无序混乱，褶皱更严重，疏水区水分子越来越多。将膜冲击过程划为三个阶段，分别为冲击阶段、恢复阶段和后效阶段。发现当冲量大于153 mPa s时，在冲击过程中没有观察到膜的损伤恢复。     

Diet,Food Intake of Phrynocephalus frontalis （Agamidae） and Its Potential Role in Desert Habitat

We examined the dietary diversity and food intake of Phrynocephalus frontalis, compared the difference of insect diversity in the natural habitats with different lizard densities, and discussed the potential role of this lizard in the desert ecosystem. The results show that： （1） arthropodans of the orders Coleoptera, Hymenoptera and Hemiptera were major dietary components of P. frontalis; （2） coleoptera larvae always formed the predominant component of lizard diets; （3） dietary diversities of P. frontalis were not significantly different between summer and autumn or between the two sexes; （4） the similarity in trophic niches between seasons was 0.756, whereas the similarity in trophic niches between sexes was 0.994; （5） stomach content weight of lizards varied significantly among different seasons, but there was no significant difference in stomach content weight between sexes; （6） insect diversity differed significantly among the groups of the habitat with different degrees of lizard density, and the habitat with moderate lizards density had the highest insect diversity. We infer that P. frontalis prey mainly on insects and change their diet and food intake with season; males and females consumed similar preys in types and weights. As an important predator, P. frontalis could affect the insect community in the arid ecosystem of Hunshandak Desert on the Mongolian Plateau.     

一个BMD家系中DXS164缺失突变的分析

用DXS164探针在一例BMD家系中发现有缺失突变。这一缺失跨越了pERT87-1至pERT87-15区域,缺失片段至少在50kb以上。用DMD基因内部的J-Bit和DMD基因两侧的C7和754探针确定缺失片段位于DXS164。本文还对这一家系中一正常男性可能存在754片段的重复进行了探讨。     

PGE1对大鼠在体小肠肌电活动的影响

PGEs exhibit a variety of actions on gastrointestinal motility.The study,therefore,has been performed to determine the effect of PGE1 on conscious rats intestinal myoelectric activity and the relation of the PGE1 action with cholinergic M receptor and adrenergic α and β receptors.     

一种口腔康复治疗器设计

目的:设计一种既可用于口腔肌肉康复训练又可用于辅助治疗的口腔康复治疗器.方法:采用AUTOCAD设计出牙套,弹簧,支杆等部件,采用硅胶制作牙套,采用碳素弹簧钢丝制作菱形弹簧,采用不锈钢制作成支杆,最后组装成一个完整的口腔康复治疗器进行应用测试.结果:应用方便、感觉舒适,有效缓解了张口难度和提高张口的开启度、增加咬合力度和有效提高治疗体位稳定性.结论:该设计成果使用舒适,有效实现面肌康复和提高咬合力,减小和避免面肌纤维化和提高了治疗位置体位稳定性.