The design of equipment and thermal routines for annealing glass particles

Equipment for annealing casework sized glass particles is described. Investigations were carried out using a simple muffle furnace, a temperature programmed furnace and a metal sample holder. Because they produced a uniform and reproducible thermal environment, best results were obtained from a combination of the temperature programmed furnace and the metal sample holder. Refractive index changes for window and toughened glass specimens were investigated and a simple, reproducible annealing routine for casework was devised.     

单亲案亲权鉴定结果判定策略

目的探讨用STR基因座进行单亲鉴定出现矛盾基因座时下结论的策略。方法根据基因频率和遗传规律,推导单亲案亲权鉴定时的非父排除率。根据平均单亲非父排除率和平均突变率,用二项分布公式分别计算出现不同数目矛盾基因座时真父和假父的概率和似然率(亲权指数)。结果对STR共显性基因座,其单亲非父排除率的计算公式为:PEM=∑i=n1pi2(1-pi)2 ∑i相似文献   

甘肃城乡一体化：现状与未来

城乡一体化作为我国一项新的发展战略,对城乡二元结构突出、基础条件偏弱、经济总量偏小、人均水平偏低的甘肃来说,既是难得的大好机遇,但也充满挑战。通过构建甘肃省城乡一体化的综合评价指标体系评价反映出甘肃省的城乡一体化有一定程度的发展,但也存在发展动力挖掘不够、产业结构单一、农村贫困率高、社会力量动员不足等问题。区域发展是嵌入在特定的社会文化背景之中的,进行文化上的足够动员、培育区域文化软实力是甘肃推进城乡一体化的关键所在。     

东莞溺死案多发河段硅藻种群分布及其法医学意义

目的调查东莞溺死案多发河段硅藻种群分布,探讨其在溺死地点推断中的意义。方法于2009年6月至9月收集东莞市东江沙田、道滘、麻涌、石碣、石龙、茶山和企石共7个河段采样点江水样本126份,并收集2例已知落水地点溺死尸体;制作各样本硅藻涂片,计算样本间Sprensen相似系数及弦平方距离(SCD),并进行聚类分析。结果 126份水样中共鉴定出70种硅藻,其中优势度>0.02的优势种群有4种;2个案例样本分别与道滘和石碣河段样本的相似度最高,与实际落水地点基本一致。结论建立区域性溺死多发河段硅藻数据库,利用Sprensen相似系数及SCD值及聚类分析进行落水地点推断具有一定可行性。     

福州晋安河水域浮游微藻种群18SrDNA分析

目的应用分子生物学方法分析浮游微藻18SrDNA序列,分析福州晋安河浮游微藻种群分布。方法在晋安河分段设立11个点采集和水样本,采用优化CTAB法提取水样总DNA,通过PCR技术扩增并对浮游微藻18SrDNA序列进行测序,应用NCBI数据库序列进行比对筛选,分析该河段浮游微藻分布情况。结果筛选出67条浮游微藻序列,11个采样点部分藻类分布存在差异,常见种群为硅藻门藻类占40%,绿藻门藻类占12%,金藻门藻类占43%,原生动物类占5%,其中硅藻和金藻为优势种群。结论晋安河福州市河段内浮游微藻种群分布有一定特征,浮游微藻18SrDNA序列分析可望成为法医学溺水死亡鉴定的新方法。     

微波消解-扫描电镜联用法在溺死诊断中的应用

目的探讨微波消解-扫描电镜联用法在溺死诊断中的应用价值。方法收集已知死因的尸体标本105例,其中水中尸体85例(生前溺死70例,死后抛尸入水15例),陆地自然死亡尸体20例。水中死亡案例同时收集落水处水样。分别用微波消解-扫描电镜联用法(方法 A)和硝酸破机-光镜联用法(方法 B)对上述尸体的离体肺、肝、肾、骨髓组织及水样进行硅藻定性、定量检测。结果①溺死尸体的肺、肝、肾、骨髓中及落水处水样硅藻检出率:A法分别为100%、94.3%、92.9%、82.9%、100%,硅藻检验阳性率为100%;B法分别为90%、62.9%、51.4%、28.6%、92.9%,硅藻检验阳性率为65.7%。②两种方法检出的硅藻种类与落水处水样中硅藻的种类均一致。③两种方法在死后入水尸体离体的肺中也检出少量硅藻(<3个/2g肺组织),但在死后入水尸体的其它脏器及陆地自然死亡尸体脏器中均未检出硅藻。结论微波消解-扫描电镜联用法较硝酸破机-光镜联用法对尸体离体组织脏器中的硅藻检出率高,方法灵敏,定性准确。     

Determining the Refractive Index Variation within Panes of Vehicle Windshield Glass

Refractive indices of seven double‐paned vehicle windshields were measured to assess the variation across the pane of glass and to evaluate collection techniques for known glass standards by comparing false negative rates. Measurements were made using a Foster and Freeman GRIM3 instrument, and a minimum of 240 measurements were made per pane. The mean SD of the windshields was 0.00004. It was further determined that collecting a known sample from two different sections of a shattered windshield gave the lowest rate of false negatives when using ± 2 standard deviations to estimate the RI variation of the known glass. Additionally, refractive indices often were highest in the center of the windshield and decreased toward the left and right edges; in approximately half the sample set, the two panes of a single windshield were differentiated by one or more properties.     

The Drowning Index: Implementation in Drowning,Mechanical Asphyxia,and Acute Myocardial Infarct Cases

Drowning is a diagnosis of exclusion based on circumstantial and autopsy correlation. Sugimura proposed a threshold value of 14.1 for the Drowning Index (DI), the ratio of lung and pleural fluid to spleen weight, as a surrogate marker to diagnose drowning. We questioned the use of DI in diagnosing drowning. We compared DI between three groups—drowning, mechanical asphyxia, and myocardial infarct—seen at Broward MEO from 2008 to 2009. Only 9.4% of 53 drownings exceeded the DI threshold of 14.1, while 30% of 10 mechanical asphyxias and 40% of 10 myocardial infarcts had DI >14.1. Sensitivity for the DI test was <10% and specificity 60–70%. Median DI values for all groups were <10. Mann–Whitney U‐test was not statistically significant between groups. The DI is neither sensitive nor specific and lacks any utility in the diagnosis of drowning.     

时间价格指数和空间价格指数的比较与协调

价格指数在经济政策尤其是价格政策制定中发挥着重要作用。从时空维度上看,价格指数一般可分为时间价格指数和空间价格指数,二者都属于价格统计的范畴,在编制要素、编制流程、组织管理模式、加权处理方式、质量调整方法等方面具有一致性。但是,时间价格指数和空间价格指数也存在显著的差异性,主要体现在理论内涵、指数性质、测度目标、计算公式、规格品价格调查范围、权重数据来源、规格品选择方案和对数据的要求等方面。推动时间价格指数与空间价格指数的协调,有助于建立一致、统一的价格统计体系,形成反映地区价格水平及变动的完整图谱。为此,实践上应积极探索ICP与CPI统计体系的整合,增加二者在居民消费品基本支出分类上的直接匹配度。