01 December 2005, Volume 0 Issue 6
    

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  • LI Kangsheng, LI Jingyang, XIONG Zhiqiang, et al
    Forensic Science And Technology. 2005, 0(6): 6.
    Abstract ( ) Download PDF ( ) Knowledge map Save
    In this study,a new method of vowel (vowel nuclear) identification by multivaria te statistical analysis,inclued analysis on coefficient of variation, coeffici ent of co rrelation, test for normality, and analysis of variances (ANOV) was introduced, we construct a identification model of Mahalanobis distance method for male speakers with the c orrect rate of 983%, and a model of Fisher's discriminant method for female wi th the correct rate of 935%.
  • SUN Hongbo, YANG Kexiang
    Forensic Science And Technology. 2005, 0(6): 9.
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    new superglue solution method to develop latent finge rprints on nonporous objects was estabished, The solution was made by add pet roleum ether as dispersant and hydroquinone as intensifier. The developing effect is very similar to that of v acuum fuming method. The experimental results show that this method can be used to develop various kinds of fingerprints on nonporous objects, which is compl ement to the conventional superglue method. 
  • PEI Maoqing, GUO Hairong
    Forensic Science And Technology. 2005, 0(6): 13.
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    The method of qualitative and quantitative analysis of cations and ani ons in explosives is established by Ion Chromatography(IC),the IC parameters o f NO-3,NO-2,SO2-3,S2O2-3,SO2- 4,ClO-3,Cl- and NH+4,Na+,K+ in common ino rganic explosives were determined. The method is simpleness,credibility and ac curacy.
  • LIU Xingjia, ZHANG Haichun, WANG Shuai, et al.
    Forensic Science And Technology. 2005, 0(6): 15.
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    Objective Through animal experiments, to study the relationship between the growth time of the maggot fly and the time of death, so as to provide r eference to estimate the time of death.Methods After the dogs had been s hot, to observe the time of maggot fly coming to the dog remains, the tim e of ov ipositing, the time of being eggs, and the time of maggots growing to the defin ite length. Results There is the direct connection between the length of mag got and the time of death, with relevance ratio θ, a formulation about calculating the time of by the length of maggot was deduced. Conclusion Through testifying actual case, the t ime of death can be estimated by using the formulation.
  • HAN Shengqiang, LIU Xia, TAN Jiayi, et al.
    Forensic Science And Technology. 2005, 0(6): 18.
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    In this paper the determination method of 3,4methylenedioxymethamp hetamine(MDMA) in urine by pentafluorobenzoyl derivatization and gas chromatogra phy with nitrogenphosphorus detection was developed. One ml urine samples we re alkalined and saturated with sodium chloride then extracted with 02ml cyclohe x ane .The extracts were added to 4μl of pentafluorobenzoyl chloride to carry out derivatization reaction at room temperature for 10min . After reaction the exce ss derivatization reagents were destroyed by washing with 01mol/L sodium hydr ox ide solution and the organic phases were devated to gas chromatography . The lim it of detection of MDMA in urine was 40ng/ml.The present method is more sensit i ve than acetyl, trifluoroacetyl, pentafluoropropanoyl ,heptafluorobutanoyl deriv atization methods and underivatization method.
  • ZHANG Jizong, XU Lixiang, CHE Hongmin
    Forensic Science And Technology. 2005, 0(6): 21.
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    The good parts of observation is articulations manus and genus for the bone age evaluation in teenagers with Xray plates and the methods of bone age estimat io n were the subjective and errors at random. The objective and accurate methods o f bone age estimation will be constructed with the application of computerized medical imaging and graphics and intellectual technique. The bone age estimation used the sternum, clavicle and pubic bone in adult and the methods need deeply research for better bone age estimated result. This article the prese nt situation and research progress of bone age estimation with Xray plate were summarized.
  • WU Dehua, XU Hankun
    Forensic Science And Technology. 2005, 0(6): 27.
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    The identification human body odor by police dog is a special techniqu e in criminal investigation. There are direct acting identification method, jar or bottle identification method, steel tube i dentification method and hole identification method. Steel tube identification m ethod and hole identification m ethod are better than others method for forensic science, because these two meth ods have the higher credibility.