认知行为实验技术研究大脑两半球信息整合机制的新进展

大脑两半球之间的信息整合机制是当前认知神经科学研究的重要课题之一.过去10多年来,采用认知行为实验技术对此进行的大量研究发现:两半球之间交换信息时的表征有其独特方式;两半球间的相互作用会调节脑的加工能力.大脑两半球之间的信息整合加工既具有明显的"生态适应性",又能根据低能耗高产出的经济性原则进行自动调节.     

图像分析技术在测定细胞DNA含量推断死亡时间中的若干问题

图像分析技术为法医学早期死亡时间推断提供了一种新的方法,但目前仍有许多局限,本文将重点讨论标本的取材及固定、涂片或切片的选择、细胞群聚和重叠的处理、参考细胞核及门槛问题,以及个体差异对图像分析的影响及相应的解决方法。     

论加强摔跤技术在擒拿格斗训练中的运用

公安实践中要求民警需要掌握过硬的擒拿格斗技能,擒拿格斗必须发展为更贴近公安实战需要的公安技能,所以要加强注重摔跤技术的擒敌技能的教学,充分地将摔跤技术融入擒拿格斗技能中,使擒拿格斗技能得到进一步的发展和提高。     

体液中微量士的宁的富集及同时检测

目的将分子印迹技术运用到法医毒物分析中,建立一种全新的测定体液中微量士的宁的方法。方法运用分子印迹原位聚合技术,在色谱柱中一步合成了对士的宁具有专属识别能力的分子印迹聚合物,以此聚合物为介质,装填一厘米的小柱,建立体液中微量士的宁的富集及同时检测方法。结果以士的宁分子印迹聚合物作为尿液和血浆中微量士的宁的富集和检测介质,方法的检出限为4.9ng,样品回收率均大于92%,相对标准偏差小于6.59%,工作曲线的线性相关系数分别为0.9991和0.9966。运用此方法对中毒家兔血浆和尿液中的士的宁进行了测定。结论建立的新方法可以实现对士的宁专属的、灵敏的检测,适合于法医学毒物分析运用。     

转基因技术对植物新品种保护之影响及对我国立法模式之启示

在知识产权领域,转基因技术在植物新品种保护制度上引发诸多争论。转基因技术对植物新品种保护制度产生了重要影响,也带来了法律上的利益分配争议。对植物新品种的保护模式,无论是专利法保护、特别法保护,抑或是两者并存的“双轨制”保护,都要取决于相关政策因素及利弊影响的权衡和取舍。就我国的现状而言,特别法更有利于植物新品种的保护。     

阅读能力的培养与提高

本文从英语能力培养中的阅读能力入手,分析论述了英语阅读的重要性。培养运用文化背景知识阅读及整体阅读的能力,培养良好的阅读习惯,提高阅读技巧及阅读能力。     

间接酶标抗体染色法检测石蜡切片中鸡肾型传染性支气管炎病毒的研究

以抗鸡肾型传染性支气管炎病毒（ＮＩＢＶ）Ｔ株的鼠源超免疫血清为一级抗体,辣根过氧化物酶（ＨＲＰ）标记的羊抗鼠ＩｇＧ为二级抗体,建立了检测石蜡切片中ＮＩＢＶ抗原的间接酶标抗体染色技术。经过特异性试验和阻断性试验,表明该方法具有高度的敏感性和特异性。应用该法对人工感染ＮＩＢＶＣ９００１株的鸡气管和肾石蜡切片中的病毒抗原进行了检测,结果：气管从感染后０．５～１１ｄ,肾从感染后１～２０ｄ,均检测到病毒抗原,阳性染色主要集中于气管粘膜上皮细胞和肾小管上皮细胞浆内。     

APM染色法在羊水栓塞诊断中的应用价值

目的　探讨APM染色法在羊水栓塞 (AFE)病理学诊断中的应用价值。方法　采用APM染色法对 1988年至 2 0 0 1年确诊为AFE的 19例病例 (AFE组 )和羊水吸入性肺炎的胎儿 3例 (阳性对照组 )、其它死因的 10例产妇 (阴性对照组 )重新进行染色和组织学检查 ,对其检验结果进行比较分析。结果　阳性组全部检出羊水成分 ,阴性组部分病例检出羊水成分 ,发现漏诊、误诊各 1例。与HE染色相比较 ,APM染色能提高角化上皮和粘液的检出率。结论　APM染色能提高羊水成分的检出率 ,有助于提高AFE诊断的准确性 ,可用于AFE病理学诊断。     

Development and Validation of a Technique for Casting Anatomical Features and Toolmarks

Time may elapse between examination of marks inflicted on the body and comparison with a potential weapon. Two‐dimensional photographs may be inadequate for effective comparison of a three‐dimensional mark with a putative instrument. Taking a cast and producing a positive image results in a lasting three‐dimensional record. This project aimed to develop and demonstrate the accuracy of an easy technique for production of long‐lasting positive images (using plaster of Paris and dental alginate). Casts of facial features of embalmed cadavers were used to produce a positive image of the face (death mask). Measurements of distances between facial anatomical landmarks were compared with measurements of distances between the same landmarks on the death masks to assess accuracy of reproduction. There were no significant differences between cadaver and death mask in 6 of 9 measurements, indicating this technique has high accuracy with less mobile facial features, but produces deformation of pliable features.     

Contactless Visualization of Latent Fingerprints on Nonporous Curved Surfaces of Circular Cross Section

Nondestructive techniques for gathering evidence are important in the field of forensics. Due to the geometry of the substrates, nondestructive visualization of fingermarks on curved surfaces remains challenging. A novel contactless technique was developed for visualizing and recording fingermark patterns on nonporous curved surfaces of circular cross section. The technique utilizes a plane mirror to transmit rays from a light source to illuminate the area of interest for fingermark visualization. The fingermark acquisition system consists of a digital single‐lens reflex (SLR) camera, a plane mirror, and a white light source. Mathematical equations are used to calculate the mirror size. Experiments were performed on various curved surfaces to determine the feasibility and effectiveness of the technique. Spectral Image Validation and Verification (SIVV) was used to analyze the captured images. The results of this study indicate that the technique described here is able to reveal fingermark patterns on curved surfaces of circular cross section.