25 April 2012, Volume 37 Issue 2
    

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    Orginal Article
  • Sex differences from fingerprint ridge density in the Chinese Han Population
    NI Ping-ya,GE Wen-dong,PEI Li
    Forensic Science And Technology. 2012, 37(2): 3-4.
    Abstract ( ) Download PDF HTML   Knowledge map Save
    Objective To study the gender differences in fingerprint ridge density in the Chinese Han population.Methods Fingerprint ridge density of 40 male individuals and 40 female individuals of Chinese Han population were counted and analyzed by SPSS software.Results The mean ridge density of fingerprints of 40 male individuals was less than 14.5 ridges/25mm2 and the mean ridge density of fingerprints of 40 female individuals was more than 15 ridges/25mm2.Conclusion The significant gender differences occur in the finger ridge density.
  • Application of the alginate material to lifting blood footprint on brunet fabric
    LIU Sai,LUO Ya-ping
    Forensic Science And Technology. 2012, 37(2): 6-8.
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    Objective To establish a method for lifting blood footprint on fabric.Methods The fabric with blood footprint was daubed with mixture of the alginate material and water, and then the lifted marks were enhanced using Acid Black 1.Results Impressed footwear marks deposited on fabric was lifted and the surface of fabric was not been damaged.Conclusion This lifting technique can be used for lifting blood impressions on fabric.
  • Recognition model of blood odor based on GC-MS analysis
    LONG Cheng-sheng,WANG Xin,WU De-hua,et al
    Forensic Science And Technology. 2012, 37(2): 9-12.
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    Objective To explore the difference between of odor between human blood and animal blood.Methods The components of blood odor were determined by Gas Chromatograph Mass Spectrometry with the Solid Phase Micro-Extraction. A model for recognition of blood odor based on stepwise discrimination analysis was established and the features came from the chromatographs of blood samples. The model code was compiled by means of Matlab.Results There were nine compounds which were significantly different between human blood and animal blood. Samples from different species could be distinguished by means of the proposed model.Conclusion The odors from human blood and animal blood were different significantly. They could be recognized by the model.
  • Evaluation of the uncertainty for the measurement of glass refractive index by oil immersion method
    GUO Hong-ling,QUAN Yang-ke,Tao Ke-ming
    Forensic Science And Technology. 2012, 37(2): 13-15.
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    The uncertainty for glass refractive index measurement was evaluated. The sources were discussed. All parameters needed for the calculation were collected and calculated. The standard uncertainty, combined standard uncertainty and expanded uncertainty were evaluated.
  • Research on identification of the authenticity of currency by fluorescence spectral imaging
    CHEN Qiang,YANG Zhi-chao,SUN Yang,et al
    Forensic Science And Technology. 2012, 37(2): 16-21.
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    Objective To explore the capability of fluorescence spectral imaging for identification of the authenticity of currency and determine whether the counterfeit money came from the same source.Methods 50 pieces of real 100yuan in 1999 edition, 50 pieces of real 100yuan in 2005 edition, 12 pieces of counterfeit 100yuan in 1999 edition, and 12 pieces of counterfeit 100yuan in 2005 edition were analyzed by fluorescence spectral imaging.Results The counterfeit money and the money coming from the different source were distinguished.Conclusion The fluorescence spectral imaging was a very effective method for distinguishing the counterfeit money and the money of different source.
  • Research on the application of Mandarin Chinese pitch patterns in speaker identification
    ZHANG Hong-bing
    Forensic Science And Technology. 2012, 37(2): 22-25.
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    Chinese is tone language; there are differences on pitch level and change of tone between speakers. In this paper, general software was used to analyze the change of pitch data from different speakers, and pitch patterns curves with apparent morphological features were established after pitch data being normalized and fitting. We could identify speaker through analyzing the differences on the form of pitch patterns and parameters.
  • The retrospective analysis of 94 homicide cases during five years in Wujin district of Changzhou city
    DING Yu-wei,SUN Ting-yi,LIANG Man,et al
    Forensic Science And Technology. 2012, 37(2): 26-29.
    Abstract ( ) Download PDF HTML   Knowledge map Save
    Objective To study homicide/murder cases and find out the characteristics, which could help us to summarize the key points and difficult points.Methods 94 homicide/murder cases taken place during 2006 and 2010 in Wujin district of Changzhou city were collected. The MS Excel software was used to perform descriptive statistic analysis.Results The incidence rate of homicide cases varied wildly in different quarter. The majority of victims and suspects were non-permenet residents, with prevalence peaking from age 18 to 40 years and a male predominance. The cause of the most death cases was mechanical injury and mechanical asphyxia.Conclusion The occurrence of homicide/murder cases has positive correlation with the population. General information of the victims and suspects differed in different cases. Investigation of criminal motivation, injury implements, distribution of injuries, and cause of death were of great importance for the forensic experts.
  • Determination of acetamiprid in human blood by GC/MS and dispersive solid phase extraction
    HOU Hong-an,ZHANG Wei-bing,SU Guo-bao
    Forensic Science And Technology. 2012, 37(2): 30-31.
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    Objective To establish a method to measure acetamiprid in human blood.Methods Acetamiprid in human blood was extracted by dispersive solid phase extraction and analyzed by GC/MS/SIM.Results The concentration of acetamiprid presented a linear range of 0.02μg/mL~2μg/mL(r=0.9997), the recoveries were 76.4%~89.8%, the relative standard deviations were 1.3%~8.3%, the limit of detection was 0.0075μg/ml.Conclusion The method is simple, accurate, easy to use, and suitable for measure of Acetamiprid in human blood.
  • The application of DNA Typer15TM Direct kit in the DNA database construction
    BAI Xue,JIANG Cheng-tao,ZHAO Xing-chun,et al
    Forensic Science And Technology. 2012, 37(2): 32-34.
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    Objective To investigate the polymorphism of 14 STR loci in Henan Han population and briefly introduce the DNA database construction process.Methods DNA Typer15TM Direct kit was used to detect the allelic frequencies of 14 STR loci in 359 unrelated Henan Han individuals the population genetics and parameters were calculate by using statistic software.Results The results demonstrated that all loci were found to be no deviation from Hardy-Weinberg equilibrium(P>0.05). Heterozygosity(H)ranged from 0.694 to 0.922, matching probability(Pm)ranged from 0.017 to 0.131, power of discrimination(PD)ranged from 0.869 to 0.983, polymorphism information content(PIC)ranged from 0.670 to 0.910, power of exclusion(PE)ranged from 0.418 to 0.841.Conclusion The 14 STR loci are relatively abundant in polymorphic information for identification and paternity test in Henan Han population. Using DNA Typer15TM Direct kit to build a DNA database is very simple and economical.
  • The research of sequence determination of seal and printed characters by measuring the stroke width
    FENG Chao,LIU Kun-ming,LI Jing
    Forensic Science And Technology. 2012, 37(2): 35-38.
    Abstract ( ) Download PDF HTML   Knowledge map Save
    Objective To explore the width changes of stroke of characters printed by laser printer and provide basis for sequence determination of seal and printed characters.Methods The cross area of seal stamp and character stroke was observed with VSC-6000 and the width of character stroke was measured.Results The width of character stroke increased in the case of the character was printed first.Conclusion The measurement of width of character stroke can provide basis for sequence determination of seal and characters.
  • Application and prospect of atomic force microscopy in forensic science
    ZHANG Ying
    Forensic Science And Technology. 2012, 37(2): 39-43.
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    As a new microscopy, atomic force microscopy has nanoscale resolution and can observe the superficial appearances and structures of the objects. This paper reviews the working operations, working modes, advantages and the applications of the atomic microscopy in forensic science.
  • Advances in the research of diatom test
    ZHAO Jian,HU Sun-lin,LIU Chao,et al
    Forensic Science And Technology. 2012, 37(2): 44-47.
    Abstract ( ) Download PDF HTML   Knowledge map Save
    In this paper,the diagnostic value of the diatom test for drowning was evaluated,and the samples collection,the methods for diatom extracting and test were summarized.
  • Prospect of ultrasonic cleaning in rusted metal evidence pretreatment
    LIU Yan,WANG Ming-zhi,FENG Zu-yi
    Forensic Science And Technology. 2012, 37(2): 48-50.
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    In this paper, the technology for cleaning rusted surface of metal evidence was summarized and the ultrasonic cleaning method and chemical cleaning method were compared.

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