25 December 2013, Volume 38 Issue 6
    

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  • Elemental analysis of paper by LA-ICP-MS
    GAO Ting, GUO Hong-ling, QUAN Yang-ke
    Forensic Science And Technology. 2013, 38(6): 3-4.
    Abstract ( ) Download PDF HTML   Knowledge map Save
    20 brands of printing paper were collected and analyzed by laser abliation—inductively coupled plasma mass spectrometry (LA-ICP-MS). The data was processed by SPSS cluster analysis .The Results showed that the most brands of the printing paper can be distinguished. LA-ICP-MS is an effective means for identification of printing paper.
  • The investigation of massive data forensic method
    LI Rong-rong, WU Chun-sheng
    Forensic Science And Technology. 2013, 38(6): 7-10.
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    Objective To investigate the method for massive data information extraction in examination of electronic evidence.Methods The characteristic of the massive data files and traditional evidence extraction method was analyzed.Results The development of special software for information extraction from massive data was suggested.Conclusion With the special software, the traditional artificial method can be changed.
  • A forensic study on variation of species and quantity of diatom in reservoir
    DU Yu, HUO Chang-ye, ZHANG Zi-ming, et al
    Forensic Science And Technology. 2013, 38(6): 11-15.
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    Objective To investigate variation of species and quantity of diatom in Xiu Lake and Qing He reservoir for analyzing cause of death and determining drowning location.Methods Water in Xiu Lake and Qing He reservoir were sampled at differently spot and time in 2012, and then the diatoms were examined with microscope.Results The species and quantity of diatom in reservoir have varied with differently time and spot. The quantity of diatom near shore and in spring area was minimal. Pennate became dominant species near shore area and centricae became dominant species in the center of the reservoir.Conclusion The species and quantity of diatom in reservoir had complex variation which affected by various factors, we should analyze the Results carefully in forensic identification.
  • Latent fingerprint detection on colored surfaces using cyanoacrylate fuming and vacuum metal deposition
    LI Xiao-jun, MU Yu-ling, Gong Xian, et al
    Forensic Science And Technology. 2013, 38(6): 16-18.
    Abstract ( ) Download PDF HTML   Knowledge map Save
    In this study, fingerprints on colored surfaces were developed by cyanoacrylate fuming and then the images were enhanced by vacuum metal deposition. The Results showed that combination of cyanoacrylate fuming and vacuum metal deposition was an effective means to detection latent fingerprints on colored surfaces.
  • Research of distinguishing several kinds of mountain soils in Fuzhou
    XUAN Yu, LIU Xiang-wei, GUO Jian, et al
    Forensic Science And Technology. 2013, 38(6): 19-23.
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    Objective To establish a method for distinguishing soil samples.Methods Element components in several kinds of mountain soils in Fuzhou were analyzed by SEM/EDS, organic matter components in soils were segregated by GPC and low boiling point organic matter components were analyzed by GC-MS.Results Several kinds of mountain soils in Fuzhou can be distinguished according to differences in element and low boiling organic matter components.Conclusion Methodwhich comprises element analysis by SEM and low boiling organic matter components analysis by GPC and GC-MS is effective in distinguishing soils in Fuzhou.
  • Forensic discrimination of electrical tape by using spectral imaging
    SUN Yang, SUN Zhen-wen, WANG Gui-qiang, et al
    Forensic Science And Technology. 2013, 38(6): 24-26.
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    Objective To explore a method for discrimination of electrical tape with same color.Methods Electrical tapes (red, yellow, blue and green) were analyzed by spectral imaging.Results The rate of discrimination for the blue, red, green and yellow electrical tapes are 99.0%, 94.3%, 93.8% and 93.3% respectively.Conclusion With the spectral imaging method, most electrical tapes can be discriminated.
  • An investigation into the use of fluorescent cyanoacrylate powder (PolyCyano UV) for the development of latent fingerprints
    LI Kang, LI Xiao-jun, CHANG Bai-nian
    Forensic Science And Technology. 2013, 38(6): 27-29.
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    The effectiveness of the PolyCyano UV powder concentration for latent fingerprints development was investigated. The Results showed that the best PolyCyano UV powder concentration is from 1g/m3 to 3g/m3.
  • A study on distribution of post-blast residues of explosive package
    ZOU Duo-sheng, SHI Lin, WANG Yan-jun, et al
    Forensic Science And Technology. 2013, 38(6): 30-32.
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    The different amount of ammonium nitrate-based explosives (10g, 15g, 20g, 25g and 30g) packed in plastic bottles were detonated respectively, and the distribution of the residues of plastics bottle were studied. The Results indicated that the amount of explosives can be estimated by the distribution of package residues.
  • A comparative study of the use of genipin or ninhydrin in fingerprints development
    WANG Ming-chao, LUO Ya-ping
    Forensic Science And Technology. 2013, 38(6): 33-35.
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    Fingerprints on copy paper, offset paper, thermal paper, kraft paper and newspaper were developed with genipin and ninhydrin respectively and the Results were compared. The Results showed that genipin solvent was effective for fingerprints on thermal paper, but ninhydrin was effective for fingerprints on other four kinds of paper.
  • Application of “hollow ridge” feature of fingerprint in fingerprint comparison
    JI Yong-cheng
    Forensic Science And Technology. 2013, 38(6): 36-38.
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    In this paper, one of level III features of fingerprint, “hollow ridge” has been studied. The reproducibility “hollow ridge” features was investigated and their discriminative value was analyzed. The Results revealed that “hollow ridge” feature is stable and comparison result can be improved by integrating “hollow ridge” feature in addition to normal features.
  • Effect of ink thickness of ballpoint pen stroke on solvent evaporative rate
    JIANG Bo, XU Tong-kai, XU Hai-hua, et al
    Forensic Science And Technology. 2013, 38(6): 39-41.
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    In this paper, effect of ink thickness of ballpoint pen stroke on solvent evaporative rate was studied by GC and HPLC. Results revealed that the evaporative rate of benzyl alcohol and Phenoxy alcohol varied with the ink thickness of strokes. Therefore the ink thickness of stroke is an important factor for ink age determination.
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    Forensic Science And Technology. 2013, 38(6): 64-65.
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