03 October 2005, Volume 0 Issue 5

    

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  The issue of forensic evidence contamination

  WANG Guiqiang

  Forensic Science And Technology. 2005, 0(5): 6.

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  Evidence contamination is one of the most important factors affecting results of evidence analysis. With the increased sensitivity o f evidence analysis methods, especially forensic DNA analysis, the risk of evide n ce contamination has greatly increased. Potential contamination of physical evid ence occurs in crime scene or forensic science lab in many ways with a lot of po ssible r esources. The use of suitable protocols in crime scene and lab can prevent and i dentify evidence contamination, which minimizes the risk of evidence contaminati on.
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  A study of polymorphisms of 16 YSTR loci in Han population in Zhejiang

  WU Weiwei, ZHENG Xiaoting, PAN Lipeng et al.

  Forensic Science And Technology. 2005, 0(5): 11.

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  Objective To complete the study of genetic polymorphis m of Y STR loci of Han population in Zhejiang, and provide the basal data for its foren sic application. Methods 16 Y-STR loci were amplified by using Y filer PCR amplification Kit, 203 unrelated male individuals of Han population in Zhejiang were investigated to determine the distributions of allele frequenci es and haplotypes. Results 4～13 alleles were found in the prev iew 15 YSTR loci, and 47 haplotypes were found in DYS385a/b locus. The GD valu e was from 03918 to 09609〖KG*4〗199 haplotypes were found in16 YSTR loc i, of whic h 196 were unique, 2 were found in 2 individuals，1 were found in 3 individuals, and the observed haplotypes diversity value was 09998Conclusio n the 16 YSTR loci are highly polymorphic and are suitable for forensic application in Zhejiang. 
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  The basic theory and technic creation about living fingerprint capture system

  LIU Huamin

  Forensic Science And Technology. 2005, 0(5): 18.

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  Objective To create a multidigital sensor and living fingerprint capture system.Methods the technic of mult idigital sensor timing inphase control, simulation of infinitude imaging, a utocollection parameter control, direction adjustment, inside special blur mat ching arithmeticetc were used.Results the rate of success for the living fingerprint capture increased efficienfly.〖WT5”HZ〗 Conclusion this system is applied to casework.
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  Examination of striation marks left by clawhammer

  WANG Mingzhi, BAI Yanping,ZHANG Fukun

  Forensic Science And Technology. 2005, 0(5): 22.

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  Objective To introduce a method for examination of striation ma rks left by clawhammer. Methods The characteristics and function of configurati on of clawhammer were studied. Test marks made with clawhammer was analyzed comprehensively. Results striatio n marks are unique to the particular clawhammer which made the mark. Conclusion clawhammer striation marks can be used for clawhammer identification.
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  The exploitation and application of zhejiang criminal assays information system

  FU Defeng

  Forensic Science And Technology. 2005, 0(5): 26.

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  The information system of specialty criminal assay about publi c security of Zhejiang provinc are introduced in this paper. with technique of computer network, The information of specialty criminal assay are managed and us ed in casework effectively.
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  Analysis of fluroxypyr 1methylheptyl by GC/MS

  LIU Ying, LUO Fang

  Forensic Science And Technology. 2005, 0(5): 29.

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  A method to detect Flruoxypyr 1Methylheptyl ester is presented in this paper. We use the GC/EI/MS、GC/CI/MS to analysis Flru oxypyr 1Methylheptyl ester and obtain the mass spectrum of Flruoxypyr 1Methy lheptyl ester. This method is accurate and reliable.
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  Determination of nikethamide in blood and cerebrospinal fluid

  CHEN Lili， LIAO Linchuan, YAN Youyi

  Forensic Science And Technology. 2005, 0(5): 31.

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  Objective To develop a highperformance liquid chromat ographic method for determination of nikethamide in human blood and cerebrospina l fluid. Methods The compounds was extracted from blood or cere brospinal fluid by liquidliquid extraction using dichloromethane after blood o r cerebrospinal fluid was adjusted pHThe extracts were analyzed by HPLC. Result Linear limits of nikethamide determination in blood ranged from 05μg/ml to 100μg/ml (R2=09993). Linear limits of nikethamide determination in cereb rospinal fluid ranged from 01μg/ml to 100μg/ml (R2=09996).Limit of detec tion was 5ng(S/N≥3).The extraction recovery was over 60% and its coefficients of variation were less than 6%. Conclusion The method is sensitive,simple,rapid and suitable for determination of niket hamide in human blood a nd cerebrospinal fluid for toxicological and clinical pharmaceutical analysis.
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  Examination of handwriting of an adult whose writing habit had not formed

  HU Yingmei, YANG Li, HU Yiqing et al.

  Forensic Science And Technology. 2005, 0(5): 34.

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  Objective To study the method for examining the handwriting of a adult whose writing habit is instability.Methods Analyzing a adult handwriting characters through true cases. Results the instability writing habit is an important reason that resulting in a adults handwriting variety,and it is also an exception for a adults natur al handwriting. It can be examined by methods used for normal handwriting examin ation.Conclusion an evaluative standard for the nonessent ial difference between questioned handwriting and sample can be used to examine the handwriting of a adult whose writing habit varied quickly in sho rt time.