首页 > 最新文献

Japanese Journal of Forensic Science and Technology最新文献

英文 中文
Usefulness of scanning electron microscope for observation of compact bone structure and saw mark 扫描电镜在观察致密骨结构和锯痕中的应用
Pub Date : 2020-01-01 DOI: 10.3408/jafst.761
In forensic anthropology, the histological structure of compact bone is useful for distinguishing human from non-human bone and for age estimation. A saw mark on the bone surface is also analyzed to estimate the implement that cut the bone. However, extensive time and technical proˆciency are required to prepare a specimen for obtaining a clear image of the compact bone structure in optical microscopy. Moreover, clear detection of a saw mark is inhibited by the limited focal depth of optical microscopy and by the color tone of bones. The purpose of this study is to evaluate imaging mode of scanning electron microscope (SEM) and preparation of bone specimen to readily obtain a clear image of the compact bone structure and saw mark in a shorter time. In this paper, a transverse section of a long bone was polished to a mirror ˆnish, completed within a few minutes by a simple method, to observe the compact bone structure. In consequence, Haversian canal, bone lacuna, and lamellar structure in the compact bone were clearly observed with compositional (COMPO) image in the backscattered electron mode. Meanwhile, the saw mark was also clearly recognized as a convexo-concave on the transverse section of the long bone with topographic (TOPO) image in the backscattered electron mode. Thus, SEM is useful to observe the compact bone structure and saw mark simply, rapidly, and clearly for practical use in forensic anthropology.
在法医人类学中,致密骨的组织学结构对区分人骨和非人骨以及年龄估计是有用的。还分析了骨头表面的锯痕,以估计切割骨头的工具。然而,在光学显微镜下制备标本以获得致密骨结构的清晰图像需要大量的时间和技术熟练度。此外,锯痕的清晰检测受到光学显微镜有限的焦深和骨骼的色调的抑制。本研究的目的是评价扫描电镜(SEM)成像方式和骨标本制备方法,以便在较短的时间内获得清晰的致密骨结构图像和锯痕。本文采用一种简单的方法,在几分钟内将一根长骨的横切面抛光成镜面状,以观察骨骼结构的致密性。因此,在反向散射电子模式下,复合成像(COMPO)清晰地观察到致密骨中的哈弗氏管、骨陷窝和板层结构。同时,在背散射电子模式下,利用TOPO图像也可以清晰地识别出长骨横切面上的锯痕为凹凸。因此,扫描电镜可以简单、快速、清晰地观察致密的骨骼结构和锯痕,在法医人类学中具有实际应用价值。
{"title":"Usefulness of scanning electron microscope for observation of compact bone structure and saw mark","authors":"T. Nakagawa, M. Doi","doi":"10.3408/jafst.761","DOIUrl":"https://doi.org/10.3408/jafst.761","url":null,"abstract":"In forensic anthropology, the histological structure of compact bone is useful for distinguishing human from non-human bone and for age estimation. A saw mark on the bone surface is also analyzed to estimate the implement that cut the bone. However, extensive time and technical proˆciency are required to prepare a specimen for obtaining a clear image of the compact bone structure in optical microscopy. Moreover, clear detection of a saw mark is inhibited by the limited focal depth of optical microscopy and by the color tone of bones. The purpose of this study is to evaluate imaging mode of scanning electron microscope (SEM) and preparation of bone specimen to readily obtain a clear image of the compact bone structure and saw mark in a shorter time. In this paper, a transverse section of a long bone was polished to a mirror ˆnish, completed within a few minutes by a simple method, to observe the compact bone structure. In consequence, Haversian canal, bone lacuna, and lamellar structure in the compact bone were clearly observed with compositional (COMPO) image in the backscattered electron mode. Meanwhile, the saw mark was also clearly recognized as a convexo-concave on the transverse section of the long bone with topographic (TOPO) image in the backscattered electron mode. Thus, SEM is useful to observe the compact bone structure and saw mark simply, rapidly, and clearly for practical use in forensic anthropology.","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"34 1","pages":"83-90"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81786150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Examination of method to detect silent allele on D19S433 locus D19S433位点沉默等位基因检测方法的探讨
Pub Date : 2020-01-01 DOI: 10.3408/jafst.766
DOI: 10.3408 / jafst.766 ) In the Japanese population, D19S433 silent allele is rarely detected in cases of testing with commercial STR kits. The silent allele causes inconsistency of STR typing results between kits and false negative parentage despite the true biological parentage. The cause of this problematical mismatch is reported that the mutation is a base change ( G > A ) 32 nucleotides downstream from the 3 ′ end of the AAGG repeats ( G32A ) , so reverse primer in STR kits fail to anneal to the binding site, con-sequently no STR peak or extremely low peak is detected. In this study, volunteers originated from 4 silent-allelic pedigrees are examined whether the silent allele was judged by AmpFlSTR Identiˆler Plus PCR ampliˆcation kit, PowerPlex Fusion system, and GlobalFiler PCR ampliˆcation kit, furthermore they carry G32A mutation or not by direct sequencing, SNaPshot genotyping, and TaqMan genotyping. In conclusion, it has been identiˆed that all silent-allelic peaks are caused by G32A mutation and followed by Mendelian genetics. Actually, some factors in‰uence the for-mation of silent allele, such as primer binding ˆdelity, improvement of other PCR reagents, and PCR cycle conditions. When the suspected silent-allelic peak appears, additional tests with multiple STR kits which containing
DOI: 10.3408 / jafst。766)在日本人群中,D19S433沉默等位基因在商业STR试剂盒检测中很少被检测到。沉默等位基因导致试剂盒间STR分型结果不一致和假阴性亲本,尽管真实的亲生父母。据报道,这一问题错配的原因是突变是AAGG重复序列(G32A) 3 '端下游32个核苷酸的碱基变化(G > a),因此STR试剂盒中的反向引物无法退火到结合位点,因此没有STR峰或检测到极低的STR峰。本研究通过AmpFlSTR Identi - ler Plus PCR扩增试剂盒、PowerPlex Fusion系统和GlobalFiler PCR扩增试剂盒检测来自4个沉默等位基因家系的志愿者是否携带G32A突变,并通过直接测序、SNaPshot基因分型和TaqMan基因分型检测他们是否携带G32A突变。综上所述,所有沉默等位基因峰均由G32A突变引起,随后是孟德尔遗传。实际上,一些因素影响沉默等位基因的形成,如引物结合度、其他PCR试剂的改进、PCR循环条件等。当出现疑似沉默等位基因峰值时,使用多个STR试剂盒进行额外检测,其中含有
{"title":"Examination of method to detect silent allele on D19S433 locus","authors":"Yukinobu Kutsuwada","doi":"10.3408/jafst.766","DOIUrl":"https://doi.org/10.3408/jafst.766","url":null,"abstract":"DOI: 10.3408 / jafst.766 ) In the Japanese population, D19S433 silent allele is rarely detected in cases of testing with commercial STR kits. The silent allele causes inconsistency of STR typing results between kits and false negative parentage despite the true biological parentage. The cause of this problematical mismatch is reported that the mutation is a base change ( G > A ) 32 nucleotides downstream from the 3 ′ end of the AAGG repeats ( G32A ) , so reverse primer in STR kits fail to anneal to the binding site, con-sequently no STR peak or extremely low peak is detected. In this study, volunteers originated from 4 silent-allelic pedigrees are examined whether the silent allele was judged by AmpFlSTR Identiˆler Plus PCR ampliˆcation kit, PowerPlex Fusion system, and GlobalFiler PCR ampliˆcation kit, furthermore they carry G32A mutation or not by direct sequencing, SNaPshot genotyping, and TaqMan genotyping. In conclusion, it has been identiˆed that all silent-allelic peaks are caused by G32A mutation and followed by Mendelian genetics. Actually, some factors in‰uence the for-mation of silent allele, such as primer binding ˆdelity, improvement of other PCR reagents, and PCR cycle conditions. When the suspected silent-allelic peak appears, additional tests with multiple STR kits which containing","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87517820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Quantification methods for within-series physiological variations in the concealed information test 隐信息试验系列内生理变化的定量方法
Pub Date : 2020-01-01 DOI: 10.3408/jafst.792
{"title":"Quantification methods for within-series physiological variations in the concealed information test","authors":"Tokihiro Ogawa, Mariko Hosoe, Natsu Nomura, Michiko Tsuneoka","doi":"10.3408/jafst.792","DOIUrl":"https://doi.org/10.3408/jafst.792","url":null,"abstract":"","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81261036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discrimination between internal and external uses by analysis of urine and blood from diphenhydramine users 通过对苯海拉明使用者尿液和血液的分析来区分内服和外服
Pub Date : 2020-01-01 DOI: 10.3408/jafst.773
 STAGE DOI: 10.3408 / jafst.773 ) In order to establish the method for discriminating between oral ingestion ( internal use ) and dermal absorption ( external use ) of diphenhydramine ( DPH ) using biological ‰uids, the excretion proˆles of unchanged DPH and its metabolites in urine as well as time-course changes in blood concentration of DPH have been inves-tigated. Urine and blood specimens were obtained from volunteer users of either the sleep-inducing drug Drewell tablet or the antipruritic drug New Restamin Kowa ointment. Unchanged and its metabolites were identiˆed and quantiˆed using liquid chromatography-tandem mass spectrometry with a C 18 semi-micro column. DPH and its three metabolites, diphenhydramine N -oxide, N -desmethyl diphenhydramine and diphenhydramine N -glucuronide, have been detected, for the ˆrst time, in urine after dermal absorption, and the urinary excretion proˆles of DPH and the metabolites were observed along with those after oral ingestion. Maximum concentration times of DPH and its metabolites in urine were between 21 and 73 hours in dermal absorption, and between 4 and 21 hours in oral ingestion. Maximum concentration times of DPH in blood for dermal absorption were also larger than those for oral ingestion. These results suggested that absorption of DPH through the skin occurs more In addition, the maximum concentrations of DPH and its metabolites in urine after oral ingestion were ten to hundred times higher than those after dermal absorption, which suggests that the urinary concentration of DPH and its metabolites could be applicable as the indexes which allow to discriminate between internal and external uses. The ˆndings obtained in this study will be indispensable as the fundamental in-formation for discussing intake situations of DPH in the forensic ˆelds.
阶段DOI: 10.3408 / jafst。773)为了建立生物制剂对苯海拉明(DPH)口服(内服)和皮肤吸收(外服)的鉴别方法,研究了未改变的DPH及其代谢产物在尿中的排泄速度和血中DPH浓度的时间变化。尿样和血样取自服用安眠药德雷威尔片或止痒药新利stamin Kowa软膏的志愿者。采用c18半微柱液相色谱-串联质谱法对其进行鉴定和定量分析。首次在皮肤吸收后的尿液中检测到DPH及其三种代谢物苯海拉明N -氧化物、N -去甲基苯海拉明和苯海拉明N -葡萄糖醛酸盐,并观察DPH及其代谢物与口服后尿液排泄的变化。尿中DPH及其代谢物经皮肤吸收的最大浓度时间为21 ~ 73小时,口服摄入的最大浓度时间为4 ~ 21小时。皮肤吸收的DPH在血液中的最大浓度倍也大于口服摄入的DPH。以上结果表明,DPH经皮肤吸收较多,口服后尿液中DPH及其代谢物的最高浓度比经皮肤吸收后的最高浓度高10 ~ 100倍,提示尿液中DPH及其代谢物的浓度可作为区分内服外用的指标。本研究获得的结论将是讨论法医领域DPH摄入情况不可或缺的基本信息。
{"title":"Discrimination between internal and external uses by analysis of urine and blood from diphenhydramine users","authors":"K. Sasaki, Akari Ishikawa, N. Shima, H. Kamata, Atsushi Nitta, Ryutaro Asai, Misato Wada, Hidenao Kakehashi, Shihoko Nakano, S. Matsuta, Tooru Kamata, H. Nishioka, A. Miki, M. Katagi","doi":"10.3408/jafst.773","DOIUrl":"https://doi.org/10.3408/jafst.773","url":null,"abstract":" STAGE DOI: 10.3408 / jafst.773 ) In order to establish the method for discriminating between oral ingestion ( internal use ) and dermal absorption ( external use ) of diphenhydramine ( DPH ) using biological ‰uids, the excretion proˆles of unchanged DPH and its metabolites in urine as well as time-course changes in blood concentration of DPH have been inves-tigated. Urine and blood specimens were obtained from volunteer users of either the sleep-inducing drug Drewell tablet or the antipruritic drug New Restamin Kowa ointment. Unchanged and its metabolites were identiˆed and quantiˆed using liquid chromatography-tandem mass spectrometry with a C 18 semi-micro column. DPH and its three metabolites, diphenhydramine N -oxide, N -desmethyl diphenhydramine and diphenhydramine N -glucuronide, have been detected, for the ˆrst time, in urine after dermal absorption, and the urinary excretion proˆles of DPH and the metabolites were observed along with those after oral ingestion. Maximum concentration times of DPH and its metabolites in urine were between 21 and 73 hours in dermal absorption, and between 4 and 21 hours in oral ingestion. Maximum concentration times of DPH in blood for dermal absorption were also larger than those for oral ingestion. These results suggested that absorption of DPH through the skin occurs more In addition, the maximum concentrations of DPH and its metabolites in urine after oral ingestion were ten to hundred times higher than those after dermal absorption, which suggests that the urinary concentration of DPH and its metabolites could be applicable as the indexes which allow to discriminate between internal and external uses. The ˆndings obtained in this study will be indispensable as the fundamental in-formation for discussing intake situations of DPH in the forensic ˆelds.","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81264016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on recovery of plant fragments from adhesive sheet and tape in forensic examination 法医鉴定中从胶布和胶带中回收植物碎片的研究
Pub Date : 2020-01-01 DOI: 10.3408/jafst.777
Forensic samples may include small plant fragments collected as trace evidence that are examined by microscopy and DNA analysis. These fragments are often recovered on adhesive tapes or sheets; as such, recovery must be carried out carefully so that important morphological features, including thorns or trichomes, are not destroyed. In this study, we investigated the use of organic solvents for the recovery of small plant fragments from adhesive tapes and sheets. Particularly, we examined the in‰uence of the solvent and of the adhesive compound on the DNA analyses. Therefore, our goal was to determine an appropriate recovery method for small plant fragments that did not have a negative impact on critical forensic analyses. Plant samples, including seeds and leaves, were attached to adhesive sheets or tapes and recovered with solvents such as water and organic solvents. The extent of recovery and the in‰uence of the adhesive compound and solvent on the subsequent DNA analyses were examined. After the immersion of plant samples in the solvent to detach them from the adhesive compound, DNA extraction and polymerase chain reaction ( PCR ) ampliˆcation were performed. Among our ˆndings, we determined that plant samples on most types of adhesive sheets can be recovered with tweezers alone and are appropriate for microscopic evaluation and DNA analysis. Organic solvents were used to recover samples attached to sheets with strong adhesives.
法医样本可能包括作为微量证据收集的小植物碎片,通过显微镜和DNA分析进行检查。这些碎片通常在胶带或纸上回收;因此,恢复必须小心进行,这样重要的形态特征,包括刺或毛,才不会被破坏。在这项研究中,我们研究了使用有机溶剂从胶带和床单中回收小植物碎片。特别地,我们检验了溶剂和黏合剂对DNA分析的影响。因此,我们的目标是确定一种合适的方法来恢复小的植物碎片,而不会对关键的法医分析产生负面影响。植物样本,包括种子和叶子,被粘在胶纸或胶带上,用水和有机溶剂等溶剂回收。考察了黏合剂和溶剂的回收率及对后续DNA分析的影响。将植物样品浸泡在溶剂中使其与黏合剂分离后,进行DNA提取和聚合酶链反应(PCR)扩增。在我们的发现中,我们确定大多数类型的粘接片上的植物样品可以单独使用镊子恢复,并且适合显微镜评估和DNA分析。使用有机溶剂回收附着在具有强粘合剂的薄片上的样品。
{"title":"Study on recovery of plant fragments from adhesive sheet and tape in forensic examination","authors":"Hiromi Itamiya, Kento Kumisaka, Hitomi S. Kikkawa, R. Sugita","doi":"10.3408/jafst.777","DOIUrl":"https://doi.org/10.3408/jafst.777","url":null,"abstract":"Forensic samples may include small plant fragments collected as trace evidence that are examined by microscopy and DNA analysis. These fragments are often recovered on adhesive tapes or sheets; as such, recovery must be carried out carefully so that important morphological features, including thorns or trichomes, are not destroyed. In this study, we investigated the use of organic solvents for the recovery of small plant fragments from adhesive tapes and sheets. Particularly, we examined the in‰uence of the solvent and of the adhesive compound on the DNA analyses. Therefore, our goal was to determine an appropriate recovery method for small plant fragments that did not have a negative impact on critical forensic analyses. Plant samples, including seeds and leaves, were attached to adhesive sheets or tapes and recovered with solvents such as water and organic solvents. The extent of recovery and the in‰uence of the adhesive compound and solvent on the subsequent DNA analyses were examined. After the immersion of plant samples in the solvent to detach them from the adhesive compound, DNA extraction and polymerase chain reaction ( PCR ) ampliˆcation were performed. Among our ˆndings, we determined that plant samples on most types of adhesive sheets can be recovered with tweezers alone and are appropriate for microscopic evaluation and DNA analysis. Organic solvents were used to recover samples attached to sheets with strong adhesives.","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88025482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Relationship of alleles to stutter ratios in Y-STR typing using the YfilerTM Plus PCR Amplification Kit 使用YfilerTM Plus PCR扩增试剂盒分析Y-STR分型中等位基因与口吃比率的关系
Pub Date : 2020-01-01 DOI: 10.3408/jafst.764
 STAGE DOI: 10.3408 / jafst.764 ) Discrimination between allele peaks and stutter peaks is important in STR typing for forensic purposes. In minus stutter, it is known that there are correlations between alleles and stutter ratios, but there are few reports on other types of stutter such as plus stutter. In this study, we examined the relationship of alleles to stutter ratios in Y-STR typing using the Yˆler TM Plus PCR Ampliˆcation Kit. DNA was extracted from blood samples collected from Japanese males and multiplex PCR ampliˆcation was performed with 1 ng DNA template. In minus stutter, high correlation coe‹cients ( r > 0.7 ) between alleles and stutter ratios were observed in 23 of 25 markers. Meanwhile, in other types of stutter, only the forward stutter in DYS392 showed such a high correlation coe‹cient. These results can be used for interpretation
阶段DOI: 10.3408 / jafst。764)在STR分型中,区分等位基因峰值和口吃峰值是很重要的。在负性口吃中,已知等位基因与口吃比率之间存在相关性,但对其他类型的口吃如正性口吃的报道很少。在这项研究中,我们使用Y- ler TM + PCR扩增试剂盒检测了Y- str分型中等位基因与口吃比率的关系。从日本男性血样中提取DNA,用1 ng DNA模板进行多重PCR扩增。在负性口吃中,25个标记中有23个等位基因与口吃率呈高相关(r > 0.7)。同时,在其他类型的口吃中,只有DYS392的正向口吃表现出如此高的相关性。这些结果可用于解释
{"title":"Relationship of alleles to stutter ratios in Y-STR typing using the YfilerTM Plus PCR Amplification Kit","authors":"Haruhiko Watahiki, K. Fujii, Takashi Fukagawa, Yusuke Mita, Tetsushi Kitayama, N. Mizuno","doi":"10.3408/jafst.764","DOIUrl":"https://doi.org/10.3408/jafst.764","url":null,"abstract":" STAGE DOI: 10.3408 / jafst.764 ) Discrimination between allele peaks and stutter peaks is important in STR typing for forensic purposes. In minus stutter, it is known that there are correlations between alleles and stutter ratios, but there are few reports on other types of stutter such as plus stutter. In this study, we examined the relationship of alleles to stutter ratios in Y-STR typing using the Yˆler TM Plus PCR Ampliˆcation Kit. DNA was extracted from blood samples collected from Japanese males and multiplex PCR ampliˆcation was performed with 1 ng DNA template. In minus stutter, high correlation coe‹cients ( r > 0.7 ) between alleles and stutter ratios were observed in 23 of 25 markers. Meanwhile, in other types of stutter, only the forward stutter in DYS392 showed such a high correlation coe‹cient. These results can be used for interpretation","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86154842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparing accuracy of geographic profiling by differences in distance measures 通过距离测量的差异比较地理剖面的准确性
Pub Date : 2019-01-01 DOI: 10.3408/JAFST.755
The accuracy of geographic proˆling for predicting a serial oŠender's home / base location was compared by using three diŠerent distance measures  the Euclidean distance, the Manhattan distance, and the Shortest route distance  using the data of 1,856 crimes committed by 124 residential burglars in Northern Tohoku area of Japan from 2004 to 2015. Logarithmic and the negative exponential coe‹cients were estimated as the distance decay function for each distance measure by using leave-one-out cross-validation. Also, search areas were calculated to compare the accuracy of geographic proˆling. Results of the Friedman's test indicated signiˆcant diŠerences in search areas of the three distance measures for tance when calculating the probability distribution for oŠenders committing crimes in a wide area that includes many edges, such as rivers, railroads, and mountains, as well as paths such as bridges and railroad crossings.
利用2004年至2015年日本东北地区124名住宅盗窃犯的1856起犯罪数据,通过使用三种diŠerent距离测量方法欧氏距离、曼哈顿距离和最短路线距离,比较了地理预测的准确性oŠender的家/基地位置。采用留一交叉验证方法,对各距离测度的对数和负指数系数作为距离衰减函数进行估计。此外,还计算了搜索区域,以比较地理定位的准确性。弗里德曼试验的结果表明,在计算oŠenders犯罪的概率分布时,在包括许多边缘(如河流、铁路和山脉)以及道路(如桥梁和铁路道口)在内的广泛区域内,三种距离测量的搜索区域显著不diŠerences。
{"title":"Comparing accuracy of geographic profiling by differences in distance measures","authors":"Aiko Hanayama, Shumpei Haginoya, Hiroki Kuraishi","doi":"10.3408/JAFST.755","DOIUrl":"https://doi.org/10.3408/JAFST.755","url":null,"abstract":"The accuracy of geographic proˆling for predicting a serial oŠender's home / base location was compared by using three diŠerent distance measures  the Euclidean distance, the Manhattan distance, and the Shortest route distance  using the data of 1,856 crimes committed by 124 residential burglars in Northern Tohoku area of Japan from 2004 to 2015. Logarithmic and the negative exponential coe‹cients were estimated as the distance decay function for each distance measure by using leave-one-out cross-validation. Also, search areas were calculated to compare the accuracy of geographic proˆling. Results of the Friedman's test indicated signiˆcant diŠerences in search areas of the three distance measures for tance when calculating the probability distribution for oŠenders committing crimes in a wide area that includes many edges, such as rivers, railroads, and mountains, as well as paths such as bridges and railroad crossings.","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75722945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Characterization and differentiation of positional isomers of fluoro-fentanyl analogs by a combination of instrumental analyses 氟芬太尼类似物的位置异构体的表征和区分通过仪器分析的组合
Pub Date : 2019-01-01 DOI: 10.3408/JAFST.760
The isomers of ‰uoro-butyrylfentanyl, ‰uoro-isobutyrylfentanyl, and ‰uoromethoxyacetylfentanyl, in which the position of ‰uorine on the Nphenyl ring varies, were synthesized, characterized, and diŠerentiated by infrared (IR) spectroscopy, liquid chromatography/mass spectrometry (LC/MS), and gas chromatography/mass spectrometry (GC/MS). The isomers could be clearly diŠerentiated by their IR spectra. In the LC/MS chromatograms, the separation of the ‰uoro-butyrylfentanyl and ‰uoro-isobutyrylfentanyl isomers was insuŠicient. However, in the GC/MS extracted ion chromatograms, all compounds were completely separated. The LC/MS and GC/MS mass spectra of the isomers were similar, demonstrating that it is diŠicult to distinguish the positional isomers of ‰uorinated fentanyl analogs by their mass spectra.
采用红外光谱(IR)、液相色谱/质谱(LC/MS)、气相色谱/质谱(GC/MS)等方法合成了1‰-丁基芬太尼、1‰-异丁基芬太尼和1‰-甲氧基芬太尼的异构体,并对其N苯基环上的位置进行了表征。同分异构体的红外光谱可以清楚地表示为diŠerentiated。在LC/MS色谱中,‰溴-丁基芬太尼和‰溴-异丁基芬太尼异构体的分离为insuŠicient。然而,在GC/MS提取离子色谱中,所有化合物都被完全分离。LC/MS质谱和GC/MS质谱分析结果相似,表明通过质谱可有效区分含氟芬太尼类似物的位置异构体diŠicult。
{"title":"Characterization and differentiation of positional isomers of fluoro-fentanyl analogs by a combination of instrumental analyses","authors":"T. Kanamori, Y. Iwata, Hiroki Segawa, Tadashi Yamamuro, K. Kuwayama, K. Tsujikawa, H. Inoue","doi":"10.3408/JAFST.760","DOIUrl":"https://doi.org/10.3408/JAFST.760","url":null,"abstract":"The isomers of ‰uoro-butyrylfentanyl, ‰uoro-isobutyrylfentanyl, and ‰uoromethoxyacetylfentanyl, in which the position of ‰uorine on the Nphenyl ring varies, were synthesized, characterized, and diŠerentiated by infrared (IR) spectroscopy, liquid chromatography/mass spectrometry (LC/MS), and gas chromatography/mass spectrometry (GC/MS). The isomers could be clearly diŠerentiated by their IR spectra. In the LC/MS chromatograms, the separation of the ‰uoro-butyrylfentanyl and ‰uoro-isobutyrylfentanyl isomers was insuŠicient. However, in the GC/MS extracted ion chromatograms, all compounds were completely separated. The LC/MS and GC/MS mass spectra of the isomers were similar, demonstrating that it is diŠicult to distinguish the positional isomers of ‰uorinated fentanyl analogs by their mass spectra.","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72638916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sea drifting cadavers: cases of the point and time of disaster entry 海上漂流尸体:灾难进入地点和时间的案例
Pub Date : 2019-01-01 DOI: 10.3408/JAFST.740
{"title":"Sea drifting cadavers: cases of the point and time of disaster entry","authors":"Yuta Maeda, Daizou Ozawa, Yasuhiro Kakiuchi, Y. Kakimoto, Shuichi Naganuma, Akihiro Iwakami, Y. Tanaka, Fumitaka Nakano, Yoshikazu Osaki, Masaki Hara, Y. Sato, Shinsuke Nakagawa, Akiko Toda, Masaya Okamura, K. Honda, Hiroyuki Inami, Y. Seto, Fumiko Satoh, M. Osawa","doi":"10.3408/JAFST.740","DOIUrl":"https://doi.org/10.3408/JAFST.740","url":null,"abstract":"","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79522501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of cannabis components by growth stage using solid-phase microextraction and solvent extraction 固相微萃取法和溶剂萃取法对大麻生长阶段成分的分析
Pub Date : 2019-01-01 DOI: 10.3408/JAFST.758
{"title":"Analysis of cannabis components by growth stage using solid-phase microextraction and solvent extraction","authors":"T. Kudo, Akio Kiguchi, H. Fujii","doi":"10.3408/JAFST.758","DOIUrl":"https://doi.org/10.3408/JAFST.758","url":null,"abstract":"","PeriodicalId":14709,"journal":{"name":"Japanese Journal of Forensic Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79843923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Japanese Journal of Forensic Science and Technology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1