绵羊与藏羊脑静脉系统整体铸型制作方法的建立

为了获得完整的脑部静脉血管通路塑料模型,经过反复试验,首次建立了脑静脉血管系统的整体铸型方法。选择新鲜的藏羊和绵羊头各15个,将用丙酮和丁酮稀释的200g/L ABS(丙烯腈、丁二烯、苯乙烯三元共聚塑料)溶液经上颌静脉灌入脑静脉窦及脑静脉血管内,经2～3d后,等待ABS溶液完全凝固时,用盐酸腐蚀掉脑、脑膜以及构成颅腔的颅骨,然后对血管铸型进行冲洗和修整。获得了完整的脑部静脉血管系统立体铸型。该铸型标本能够清楚地显示脑静脉窦和血管的位置、走向、管径及其相互之间的关系,同时还能够清晰地显示出颅内外静脉血管之间的联系。该方法的建立使整体展现脑内静脉血管系统成为现实,也为进一步深入研究脑静脉系统奠定了基础。     

Correlation Between Average Tissue Depth Data and Quantitative Accuracy of Forensic Craniofacial Reconstructions Measured by Geometric Surface Comparison Method

Accuracy is the most important factor supporting the reliability of forensic facial reconstruction (FFR) comparing to the corresponding actual face. A number of methods have been employed to evaluate objective accuracy of FFR. Recently, it has been attempted that the degree of resemblance between computer‐generated FFR and actual face is measured by geometric surface comparison method. In this study, three FFRs were produced employing live adult Korean subjects and three‐dimensional computerized modeling software. The deviations of the facial surfaces between the FFR and the head scan CT of the corresponding subject were analyzed in reverse modeling software. The results were compared with those from a previous study which applied the same methodology as this study except average facial soft tissue depth dataset. Three FFRs of this study that applied updated dataset demonstrated lesser deviation errors between the facial surfaces of the FFR and corresponding subject than those from the previous study. The results proposed that appropriate average tissue depth data are important to increase quantitative accuracy of FFR.     

A Direct Aqueous Derivatization GSMS Method for Determining Benzoylecgonine Concentrations in Human Urine

A sensitive and reliable method for extraction and quantification of benzoylecgonine (BZE) and cocaine (COC) in urine is presented. Propyl‐chloroformate was used as derivatizing agent, and it was directly added to the urine sample: the propyl derivative and COC were then recovered by liquid–liquid extraction procedure. Gas chromatography–mass spectrometry was used to detect the analytes in selected ion monitoring mode. The method proved to be precise for BZE and COC both in term of intraday and interday analysis, with a coefficient of variation (CV) <6%. Limits of detection (LOD) were 2.7 ng/mL for BZE and 1.4 ng/mL for COC. The calibration curve showed a linear relationship for BZE and COC (r² >0.999 and >0.997, respectively) within the range investigated. The method, applied to thirty authentic samples, showed to be very simple, fast, and reliable, so it can be easily applied in routine analysis for the quantification of BZE and COC in urine samples.     

尼龙植绒拭子与棉拭子血痕DNA分型效果比较

目的探讨尼龙植绒拭子与棉拭子血痕DNA分型检验的效果。方法取抗凝全血用去离子水倍量稀释2、4、8、16、32、64、128倍,各取1μL分别滴加于尼龙植绒拭子与棉拭子头部,干燥制成血痕,应用Chelex-100提取每个浓度两种材质拭子的血痕样本DNA,采用Identifiler Plus试剂盒进行复合扩增,3500XL型遗传分析仪进行检测,对比各组DNA分型检验成功率。结果 1检验成功率:稀释16~64倍尼龙植绒拭子血痕均明显高于相同稀释倍数的棉拭子血痕(P0.001);其余浓度血痕两种材质拭子的检验成功率无明显差异;2分型图谱峰高和均衡性:不同浓度尼龙植绒拭子血痕峰高多为棉拭子血痕的2倍以上,16~64倍稀释血痕尼龙植绒拭子均衡性更好。结论尼龙植绒血痕拭子的检验效果优于棉拭子血痕,在微量血痕检验时优势更明显。     

基于紫外可见反射光谱法对染色头发的初步研究

紫外可见反射光谱法是一种快速无损检验的方法,本文从采样量、样品的固定等方面对染色头发进行紫外可见光谱检验方法进行了初步探索,使用紫外可见光谱仪的积分球附件可以对不同染发剂染色头发进行大致的分类鉴别。     

虚拟治理成本法在环境损害司法鉴定中的应用研究

虚拟治理成本法作为一种常用的环境价值评估方法,对于环境污染责任追究工作发挥着重要作用.通过系统梳理虚拟治理成本法相关定义、适用范围以及评估流程,并对2014-2020年期间(以裁判日期计)国内典型相关案例从时间分布、地域分布、污染物类别及环境受体、鉴定机构情况等方面进行研究,梳理该方法的实践应用情况,总结我国虚拟治理成...     

行政纠纷的多元化解决机制

由于行政机关系行政纠纷当事人一方、行政权对其他权力的支配性等原因,处理行政纠纷机构的中立性、独立性就成为有效化解行政纠纷的重要因素,为此,应从推进民意表达机制、改进行政复议和行政诉讼制度等五个方面完善或建立行政纠纷的解决机制。     

从思想政治工作的视角谈学习型政党的创建

党的十七届四中全会提出将我们党建设成"马克思主义学习型政党",而思想政治工作作为我们党的优良传统和政治优势,与建设学习型政党密切相关。思想政治工作要在方向指引、理念更新、内容拓展、载体创新四个方面实现创新,从而大力推进学习型政党的建设。     

论案例教学在哲学课中的运用

案例教学作为一种启发式、讨论式的教学方式,在哲学课教学中的合理运用,能够激发学生的学习兴趣,有利于培养学生的辩证思维方法,提高学生分析和解决问题的能力。正确选编哲学案例、准确严密地剖析案例、并恰当的对案例进行总结,是做好案例教学的有效方法。