Differex~（TM）与Chelex-100法在混合斑检验中的应用比较

目的探讨DifferexTM系统法在法医学性侵犯案件混合斑检验中的应用价值,并与传统Chelex-100法进行比较。方法对日常性侵犯案件中的生物检材分别通过DifferexTM系统法与Chelex-100法检验来比较两种方法的优劣。结果采用Chelex-100法提取时,在所检验样本中仅有床单全部获得单一分型,而采用DifferexTM系统法则只有一条内裤的分型为混合型,其它均为单一分型。应用DifferexTM系统法还可以同时提取女性上皮细胞DNA,成功率为100%。采用Chelex-100法时出现双尖峰的频率也明显超过DifferexTM系统法。结论 DifferexTM系统法在法医学性侵犯案件混合斑检验中比Chelex-100法具有更明显的优势,是一种非常有应用前景的方法。     

东北地区4个民族ABO血型基因频率的调查分析

目的研究东北地区汉族、满族、蒙古族和朝鲜族人群中ABO基因型及等位基因频率分布特点。方法应用GoldeneyeTMABO基因分型系统共检测1588例4民族人群样本的ABO基因型,并绘制遗传系统发生树。结果 4民族A、B、O基因频率分别为:0.208 9、0.241 5、0.549 6(汉族),0.230 8、0.233 0、0.536 2(满族),0.213 0、0.237 7、0.549 3(蒙古族),0.223 0、0.230 0、0.547 0(朝鲜族)。辽宁满族与吉林满族ABO血型分布存在显著性差异,并在系统发生树中,吉林满族相对其他六个群体,自成一簇。辽宁满族与吉林朝鲜族,辽宁汉族与辽宁蒙古族遗传关系较近。结论东北地区汉、满、蒙、朝4民族人群ABO血型分布状况及基因频率均相对稳定。比较相关群体间遗传距离发现,同地区或近地域内的不同民族群体之间存在一定的基因交流,个别群体又相对独立。     

24个X-STR及7个Y-STR基因座复合扩增体系建立及法庭科学有效性验证

目的建立24个X-STR基因座及7个Y-STR基因座的复合扩增体系,进行24个X-STR基因座的遗传多态性调查,并评价该体系的法医学应用价值。方法采用六色荧光标记技术,对24个X-STR基因座(DXS6803,DXS10159,DXS10146,DXS7132,DXS10075,DXS8378,DXS7424,DXS101,DXS6795,HUMARA,DXS10074,DXS6801,DXS6789,DXS10135,GATA144D04,DXS7423,DXS10101,HPRTB,DXS10148,GATA165B12,DXS10103,DXS8377,DXS6797,DXS6810)进行复合扩增和毛细管电泳检测;调查山东汉族1057名无关男性个体24个X-STR基因座的遗传多态性,并对系统性能进行评价。结果本文建立的复合扩增体系中的24个X-STR基因座,在1057名个体中共检出1057种单倍型。方法特异性好,分型结果准确稳定,灵敏度达0.0625ng,实际案例常见生物检材的检验结果良好。结论该复合扩增检测体系可以用于实际案例检验,弥补商品化X-STR基因座复合扩增检测体系的不足,联合应用加入的Y-STR基因座适用于混合斑的鉴别。     

同时鉴定9种肉源种属的复合检测体系的建立及其应用

目的建立一种可以同时鉴定猪、牛、羊、鸡、鸭、猫、狗、鼠和鲤鱼的多重PCR检测方法,并测试其技术性能指标,评估其在法医学或食品安全事件中的应用价值。方法根据上述9种动物的线粒体细胞色素b基因,利用其片段中种间特异性强的序列设计引物,采用毛细管电泳检测平台对各种属PCR扩增产物进行检测,依据扩增片段长度的差异与标记的荧光对初始模板的肉源种属进行鉴别;并通过扩增特异性、实际样本测试、混合样本检测灵敏度等指标评价该方法在实际法医学或食品安全案件中的应用价值。结果经过验证,建立的同时鉴定9种肉源种属的复合检测体系对其中任意一个种属的检测特异性均较高,且灵敏度较强,能够满足绝大多数法医学或食品安全案件中的检测要求。结论本研究建立的肉源种属复合检测体系可以在法医学未知种属样本的鉴定及食品安全肉类掺假等案件中提供帮助。     

Reflections on variability in the blood–breath ratio of ethanol and its importance when evidential breath-alcohol instruments are used in law enforcement

Variability in the blood–breath ratio (BBR) of alcohol is important, because it relates a measurement of the blood-alcohol concentration (BAC) with the co-existing breath-alcohol concentration (BrAC). The BBR is also used to establish the statutory BrAC limit for driving from the existing statutory BAC limits in different countries. The in-vivo BBR depends on a host of analytical, sampling and physiological factors, including subject demographics, time after end of drinking (rising or falling BAC), the nature of the blood draw (whether venous or arterial) and the subject’s breathing pattern prior to exhalation into the breath analyzer. The results from a controlled drinking study involving healthy volunteers (85 men and 15 women) from three ethnic groups (Caucasians, Hispanics and African Americans) were used to evaluate various factors influencing the BBR. Ethanol in breath was determined with a quantitative infrared analyzer (Intoxilyzer 8000) and BAC was determined by headspace gas chromatography (HS-GC). The BAC and BrAC were highly correlated (r = 0.948) and the BBR in the post-absorptive state was 2 382 ± 119 (mean ± SD). The BBR did not depend on gender (female: 2 396 ± 101 and male: 2 380 ± 123, P > 0.05) nor on racial group (Caucasians 2 398 ± 124, African Americans 2 344 ± 119 and Hispanics 2 364 ± 104, P > 0.05). The BBR was lower in subjects with higher breath- and body-temperatures (P < 0.05) and it also decreased with longer exhalation times into the breath-analyzer (P < 0.001). In the post-absorptive state, none of the 100 subjects had a BBR of less than 2 100:1.     

Chapter IV: Child Welfare Education:

No abstract available for this article.     

Finding Identity in Family Work

SUMMARY

The family has always enjoyed an elevated status in Ireland, yet it was not until the mid-1990s that family-based intervention work really found expression in a new division of child and youth care: community child care-workers. This paper introduces readers to an area of child and youth care work in Ireland devoted to an ecological understanding of the child “at risk” and working with the child and the child's family outside of a residential or institutional setting. The paper includes a brief interview with a community child care-worker, observations from a master's student in social care who has also worked in community child care, and concludes by reviewing 12 key areas community child care-workers must address if their status is to be secured in the Irish child and     

Homework

This article explores how plays in the 1890s engaged with an aspect of evolutionary theory that had become particularly vexed—namely, the idea of gender essentialism: whether motherhood was the true calling for women; whether the bond with the infant was inevitable and instinctive; whether, as Shaw's teleological, progressive vision would have it, the woman's evolutionary role was to be the ‘life force’, selecting the superior mate for the continued improvement of the species. Considering this question can deepen our understanding of the interaction between science and literature in this period, and also usefully complicate the narrative often told about the figure of the New Woman in drama. Two plays of this period address particularly well the question of what is ‘natural’ maternal behaviour: James A. Herne's Margaret Fleming (first staged in 1890) and Elizabeth Robins and Florence Bell's Alan's Wife (first staged and published in 1893).     

Distal Humerus Morphological Variation and Sex Estimation in Modern Thai Individuals,

Due to differential preservation, it is necessary to develop sex estimation methods on varied anatomical regions, including the distal humerus. Sexually dimorphic differences of the medial epicondyle angle, olecranon fossa shape, trochlear extension, and trochlear constriction have been documented in several non-Asian groups. This study examines distal humerus morphological variation in 616 modern Thai individuals (f = 198; m = 418) 18–96 years old and tests the methods on a hold-out sample of 152 individuals (f = 91; m = 61). The results indicate that population-specific binary probit regression performs the best (74.1–100%), followed by composite scoring (77.0–90.1%), binary logistic regression (63.3–92.2%), and univariate sectioning points (37.7–90.1%). Age minimally effects the expression of the medial epicondyle angle in males, and trait scoring is susceptible to high intra- and interobserver error. While demonstrating relatively high sex biases, distal humerus morphology can be used to estimate the sex of Thai individuals when more sexually dimorphic regions are absent.     

基于计算机自动识别的笔迹特征动力学分析

要实现计算机笔迹识别,必须深入分析笔迹特征和仔细甄别书写过程中的时间和空间的运动关系。汉字识别技术与笔迹鉴定相比,二者对检材、样本的条件要求不同,鉴定的目的不同,提取的特征不完全相同,得出的识别或鉴定的结果的意义不同。只有依照笔迹鉴定的要求,在特征提取、识别算法、测量技术等方面有突破性进展的基础上,才能实现身份认证意义上的计算机笔迹自动识别系统。