水平管中气固两相流的混沌特征分析

对水平管密相气力输送系统的混沌动力学行为进行了分析，对煤粉浓度信号时间序列的最大Lyapunov指数和关联维数进行了计算。结果表明，系统的最大Lyapunov指数均大于零，这充分说明煤粉在水平管中的密相气力输送存在混沌特征。从密相移动床流区到沉积层流区，混沌吸引子由大变小，关联维数从1．5359减小到1．0764。说明从密相移动床流区到沉积层流区，流体系统运动的混沌程度逐渐减弱。     

荧光分光光度法检测半乳糖化白蛋白磁性阿霉素纳米粒在大鼠体内分布的研究

目的观察由半乳糖化白蛋白磁性纳米粒运载的阿霉素经舌静脉给药后在大鼠体内的的分布状况.方法全部大鼠随机分为四组,经舌静脉,按分组分别注射相应药物,剂量均为阿霉素2.5 mg/kg体重.取全血、心、肺、肝、脾、肾.全血制成血浆,器官组织制成匀浆,盐酸乙醇法提取阿霉素,用荧光光度计测量.结果静脉注射同等剂量、不同剂型的阿霉素药物后,阿霉素在器官中的蓄积程度从高到低:肝:D靶肝＞D非靶肝、C＞B＞A;心脏、肾、血浆:A＞B＞D、C;脾:B＞A、C、D;肺:B＞A＞C、D.磁性阿霉素白蛋白纳米粒注入体内后,在心、肺、肝、脾、肾中的药物浓度在15～30min达峰值,而半乳糖化后,阿霉素的药物峰值提前到5 min或之前.外加磁场和未加磁场的半乳糖化白蛋白磁性阿霉素纳米粒组的药物靶向指数和药物选择指数是均高于磁性白蛋白纳米粒.结论磁性阿霉素白蛋白纳米粒经半乳糖化后,可显著增强阿霉素对肝脏的靶向性,并显著降低心、肺、脾、肾、血浆肝外器官的组织阿霉素浓度.利用外加磁场,可提高阿霉素在肝脏特定部位蓄积的能力.因此,静脉注射半乳糖化白蛋白磁性阿霉素纳米粒是可行的.     

天然冰片在小鼠组织内的GC—MS测定法和组织分布研究

目的：建立天然冰片在小鼠组织内含量测定的GC—MS法并进行组织分布研究，初步探索天然冰片的归经特征。方法：采用DB-5MS弹性毛细管色谱柱（0．25mm×30m×0．25μm）；电子轰击（E1）电离方式，轰击能量为70eV，倍增电压1100V；选择性离子检测（SIM），天然冰片m／z95，内标萘m／z128；小鼠组织样品用生理盐水匀浆后，加入萘作为内标，用正己烷振荡萃取，取上清液进样测定。组织分布研究以天然冰片的CMC—Na溶液给小鼠灌胃，在不同时间点分批处死小鼠后取各组织样本，经处理后用GC—MS法测定组织中的天然冰片含量。结果：本研究建立的天然冰片GC—MS测定方法，在22ng·mL^-1 -22μg·mL^-1范围内响应信号（Y）与天然冰片浓度（X）呈良好线性关系，Y=0．000486X＋0．00036，R^2=0．999（n=3），最低检测限为10ng·mL^-1，定量下限为22ng·mL^-1，日内精密度为3．72—6．11％，日间精密度为7．29～17．6％，相对回收率和提取回收率分别为85．95～107．93％和93．04～103．03％。组织分布研究结果表明，天然冰片分布于大部分组织，单个组织内天然冰片浓度随时间延长呈现多峰现象；天然冰片在肝脏内含量最高，在心、脑、肾等重要组织内的含量也较高。结论：本研究建立的GC—MS测定方法准确、可靠，可用于天然冰片在动物体内的定量分析；天然冰片在不同组织内的分布有明显差异，肝、肾、心、脑中分布含量较高；天然冰片的归经特征中有归心经的趋势。     

12例Dandy—Walker综合征的临床CT与MRI分析

目的分析Dandy—Walker综合征的临床及cT与MR!影像特征。方法采用cT与MRI常规扫描，对12例Dandy—Walker综合征的临床表现、CT与MRI征象进行回顾性分析；结果12例Dandy—Walker综合征的CT与MRI表现归纳为①小脑蚓部缺失，小脑半球发育不良、完全分离，分离的小脑半球可以不对称；②第四脑室呈囊状、扇形、三角形显著扩张或后颅窝巨大囊状阴影与第四脑室相通；③窦汇异常抬高，越过人字缝／天幕抬高；④幕上脑室对称性扩张，脑积水。结论对Dandy—Walker综合征的诊断，CT扫描能够显示后颅凹及天幕上下脑的形态与结构，其CT表现具特征性；MRI可多平面扫描，无骨质伪影，显示后颅凹优于CT，在矢状面上可显示小脑、第四脑室、导水管、后颅凹囊肿以及与天幕的关系。CT与MRI扫描对Dandy—Walker综合征能够做出定性诊断，是术前诊断的主要依据，检查无痛苦，有重要的诊断和鉴别诊断价值。     

Foot Polydactyly and Polysyndactyly: Genetic Implications in Two Families

The purpose of this study was to determine the genetic characteristics of foot polydactyly and identify its inheritance pattern by analyzing familial pedigree. Five cases from 2 Korean families were studied: 1 is a family whose members have been affected for 4 generations and the other for 2 generations. Using peripheral blood samples, we performed chromosomal analysis using the banding technique with Giemsa stain and karyotyping. We investigated the shape and structure of 46 chromosomes, looking for translation, deletion, inversion, ring chromosome, and isochromosome abnormalities. All peripheral blood samples demonstrated no chromosomal abnormalities, though the genetic nature of foot polydactyly and a new genetic locus was identified recently by other studies. Familial pedigree analysis suggested that polydactyly was inherited as an autosomal dominant trait in the first family. The mode of inheritance for the second family could not be determined due to an insufficient number of family members. The result of this study brought us to the conclusion that, while genetic factors play a major role in polydactyly, other factors may contribute to its occurrence.     

口腔鳞状细胞癌颈淋巴转移范围和临床病理因素间的相关性研究

目的探讨口腔鳞状细胞癌颈淋巴转移范围和临床病理因素间的关系。方法对26例已存在颈淋巴转移的原发口腔癌患者，进行颈淋巴转移范围和患者的临床病理资料的统计分析，寻找影响转移范围的主要因素。结果单因素分析发现，肿瘤生长方式和分化程度与转移范围相关。多因素分析显示，肿瘤生长方式(浸润型)和肿瘤转移范围相关。结论对颈淋巴已有转移的口腔癌患者，若原发灶为浸润性生长，肿瘤倾向于更大范围的转移。对已有颈淋巴转移的口腔癌患者，颈淋巴清扫术范围的制定，主要考虑肿瘤生长方式，适当考虑肿瘤发病部位、厚度、大小和细胞的分化程度，可以不考虑患者年龄和性别。     

Pressure distribution and perceived comfort in casual footwear

The aim of this investigation was to establish the relationship between short-term perceived comfort and pressure distribution on the dorsal and plantar surfaces of the foot, while walking in a range of commercially available casual footwear. The study was carried out in the biomechanics laboratory of Manchester Metropolitan University using 15 male subjects without foot pathology. Perceived upper and plantar comfort were measured using a specially designed questionnaire, while dorsal and plantar pressure distributions were measured using a rectangular sensor pad recording at 30 Hz and a Mikro-EMED insole recording at 100 Hz respectively. Analysis of variance tests were used to determine differences in perceived comfort and pressure distribution between three pairs of shoes. The findings of this study suggest that an increase in total plantar force and force-time integral may relate to a decrease in perceived plantar comfort. For the three shoes examined in this study, overall peak plantar pressure, the pressure-time integral, and total plantar area did not appear to be linked to perceived plantar comfort. Findings for the shoe upper indicate that decreased dorsal forces and pressures may be related to decreased upper comfort. These findings suggest that the measurement of pressure distribution at the foot-shoe interface could be a useful tool in identifying the causes of discomfort in footwear.     

~(125)Ⅰ眼镜蛇毒及抗眼镜蛇毒血清在小白鼠体内分布的比较观察

用氯胺-T法125I标记眼镜蛇毒示踪液及抗眼镜蛇毒血清。小白鼠分二组，用125I-眼镜蛇毒、125I-抗眼镜蛇毒血清分别给小白鼠尾静脉注射，于注射后的不同时间测定血、颈部肌肉、肝、肺、肾、心等脏器放射性分布。结果发现：125I-眼镜蛇毒在肌肉及肝、肺等器官中于注射后2小时过高峰，在肾脏中浓度高，在脑未见放射性分布，抗眼镜蛇毒血清与眼镜蛇毒分布相似但在肌肉及肺脏有更高的分布。证明抗眼镜蛇毒血清能跟踪分布眼镜蛇毒。     

氨茶碱治疗病态窦房结综合征患者的观察与护理

采用氨茶碱治疗病态窦房结综合征３０例，近期有效率为８７．０％，远期有效率（１０个月）为７４．１％。护理重点：①按时按量用药；②保证足够的用药时间；③密切监测血中氨茶碱浓度；④加强药物副反应的观察；⑤定期心电监测，严密观察病情，做好心理护理。