Characterization and haplotype analysis of 10 novel Y-STR loci in Chinese Han population

In this study, we analyzed allelic sequences of 10 novel Y-specific STR loci, DYS454, DYS510, DYS513, DYS520, DYS542, DYS544, DYS552, DYS561, DYS587 and DYS593, surveyed the distribution of haplotypes in a Chinese Han population. Extracted DNA was amplified with PCR, followed by a horizontal non-denaturing polyacrylamide gel electrophoresis with discontinuous buffer system. Purified alleles were sequenced on DNA sequencer (ABI Model 377) to verify the number of motif repeats. The number of alleles observed at each locus ranged from 3 to 8, yielding 102 haplotypes in 103 unrelated males samples. The allele diversity values for each locus ranged from 0.2099 (DYS544) to 0.7523 (DYS552). The haplotype diversity using all these loci was 0.9998. Our study revealed that they were valuable Y-specific markers for forensic applications.     

“网络援助”系统工程的可行性探讨

首次提出了"网络援助"概念.网络援助系统的出现,可以以第三方介入的形式来帮助计算机应用人员缓解信息技术快速发展带来的压力,提高计算机应用人员的应用能力,从而缩小"技术鸿沟",秉持"普遍性服务"和"公平近用"的理念,挖掘信息技术的应用和发展潜力,以人为本,推动信息技术的普及.     

The identification of a dismembered human body: a multidisciplinary approach

A criminal case was directed to a multidisciplinary forensic team for identification, concerning a victim whose head, having two gunshot wounds, had been separated by a sharp instrument and was recovered 6 months later. The purpose of this research was to determine the sex and age of the victim for human identification. Primarily, macroscopic examination of the skull, tooth, and DNA analysis was conducted for sex determination. A rough assessment of age was made from the skull based on anthropological findings, however a more definitive result of age estimation was determined utilizing dental morphology. The dental data showed an age range of 32-37 from the mineral examination and the formulation of microscopic measurements. The results obtained from the skull and dental analysis matched with the physical characteristics of the victim's body, the known personal data of this person, and with the superposition of the photos gathered by a formal request. Besides, the result of DNA profiling of the victim showed male gender and direct relationship with the victim's presumed wife and daughter. Generally, research on human identification consists of sex and age determination. The sex characteristics can be precisely proved from DNA tests. However, age can be estimated by skeletal, and dental analysis. In this case the performed sex and age analysis lead the research to the selective matching of the missing person's identity.     

Precedent Externality, Network Effect, and the Possible Inefficiency of the Evolution of Laws

Using the traditional scenario of tort conflict as an example, I argue that the marginal precautionary costs of injurers and victims are not constant, as was assumed by most previous researchers. The precedent of a liability rule has some natural externality on the precaution technology, and hence marginal cost, faced by future agents involved in torts. The adoption of legal rules therefore has a network effect, meaning that the present prevalent adoption of one rule increases the probability of its future adoption. Treating the dynamic evolution of legal rules as a random process, we are able to apply an established result in the literature of network economies to conclude the path-dependence, non-predictability, and potential inefficiency concerning the final legal rule to which the dynamics converge.     

大鼠皮肤钝器伤血管内皮生长因子表达变化的研究

目的观察大鼠皮肤钝器伤后VEGF表达的变化规律。方法应用免疫组化技术观察大鼠皮肤钝器伤后不同时间(1h、3h、6h、12h、1d、3d、5d、7d、9d)VEGF的表达情况,并用MIAS图像分析系统进行图象分析。 结果正常对照组大鼠皮肤有低水平VEGF表达,钝器伤后VEGF表达逐渐增加,于伤后7d达峰值,伤后9d开始下降。 结论皮肤钝器伤可诱导VEGF表达增加,其时序性变化可望作为一种客观指标用于法医学损伤时间的推断。     

重庆历史关头的又一次“赶考”—新世纪新阶段坚持“两个务必”

54年前,在中国革命由新民主主义向社会主义转变的重大历史关头,中国共产党在西柏坡召开了七届二中全会.在这次会议上,毛泽东同志高瞻远瞩地向全党特别是党的高级干部敲响了警钟,提出了"两个务必"的著名论述.从西柏坡动身前往北京的时候,毛泽东同志一再提到李自成,并把执政喻为进京"赶考",衷心希望我们党考个好成绩.     

论新形势下解放思想实事求是的新内容

新形势下必须进一步提高和增强对解放思想、实事求是的自觉性和坚定性,科学把握解放思想、实事求是的新内容,统一全党全国人民的思想和行动,在实践中丰富和发展马克思主义。