01 August 2006, Volume 0 Issue 4

    

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  Proficiency tests for forensic science

  WANG Guiqiang

  Forensic Science And Technology. 2006, 0(4): 3.

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  Proficiency tests is one of the most important parts of quality insurance system in forensic science laboratory, and it can effectively evaluate, monitor and improve proficiency and quality of forensic examination in the laboratory. This paper describes the procedure and types of forensic proficiency tests, and their usages in quality management of forensic laboratory. Then it is introduced the use of proficiency tests in forensic laboratories in America and Europe. Finally, it is recommended to fully use the proficiency tests in forensic science laboratories in China.
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  Determination of ether in blood by headspace gas chromatography

  Ying Jianbo; Xu Yiquan

  Forensic Science And Technology. 2006, 0(4): 9.

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  Objective To establish method for determination of ether in blood by headspace GC with flame ionizzation detector (GC/FID). Method Ether in blood was analyzed by headspace GC.Results The detection limit of ether in blood was 0.3ug/ml, the recovery was 81% and the RSD was 4.4%. Coclusion The proposed method is simple, fast, sensitive. It is fit for numbers of standardization analysis of volatile poison.
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  Development of latent prints using titanium dioxide

  XIE Wei; CHANG Bainian; LI Hua

  Forensic Science And Technology. 2006, 0(4): 11.

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  Objective To explore the application of small particle TiO2 reagent on development of latent fingerprints. Methods (40) Fingerprints on six different kinds of substrates, which were preserved one day and seven days, and they were developed by SPR (small particle reagent).Results The fingerprints preserved for one day and seven days have not evident difference, but the developing result of sebaceous fingerprint was better than the eccrine fingerprints. Conclusion The small TiO2 particle reagent is effective reagent for latent fingerprints on the non-porous surfaces.
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  onstitution and succession of sarcosaphagous flies community in hohhot

  CHANG Yunfeng, CAI Jifeng，DENG Zhenhua，et al.

  Forensic Science And Technology. 2006, 0(4): 14.

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  Objective To determine the constitution and succession of sarcosaphagous flies community appeared on some animal carcasses in Hohhot district in the summer and autumn. Methods Sixteen rabbits and one dog were killed and some bowels of chickens and fishes were placed outdoors at different time from July to October in three years in Hohhot district. The constitution and succession of sarcosaphagous flies community that appeared on the above cadavers were discovered and recorded. Results The sarcosaphagous flies were the first community of sarcosaphagous insects and the obvious regulations of the constitution and succession of sarcosaphagous flies community appeared on above animal carcasses at different postmortem interval. Conclusion It may be useful for determining time, manner and place of death for forensic doctors in Hohhot district.
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  The progress of evidence character and analysis technique of human body odor

  WU Dehua,XU Hankun

  Forensic Science And Technology. 2006, 0(4): 18.

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  Human body odor is a kind of biology information and root in skin gland of the human. The heredity gene controls the human leukocyte antigen and deciding the characteristic of the human body odor by the immune system. The human body odor left on the crime scene has the relative stability and can be used as evidence to link suspect. Discrimination human body odor by police dog is a main technique method. The human body odor can also been analysis by Electronics nose and gas chromatography & mass spectrometry(GC/MS).GC/MS is a kind of effective analyze method to the intricate organism compound and GC/MS is frequently used to identify and quantify odorous compounds as olfactometry. Demonstrated each other the result of the police dog discrimination of human odor and instruments analysis of human odor are development direction to investigated odor evidence and a key technique of human odor evidence.
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  Recovery of deleted records from Microsoft SQL Server log file

  XU Lian

  Forensic Science And Technology. 2006, 0(4): 24.

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  Objective To recover deleted records from Microsoft SQL Server. Method Analyzing the SQL Server log files structure and using Lumigent Log Explorer to find out all the user records in the log files. Result From a sample log file of a database, found out more than seven hundred thousand recodes by use of Lumigent Log Explorer. Conclusion This method is useful in analyzing and recovering deleted records from SQL Server logfiles.
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  PIXE analysis technology and its application in forensic science

  HENG Lei, DING Yongsheng

  Forensic Science And Technology. 2006, 0(4): 27.

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  This paper presents PIXE analysis technology and its application in forensic science, study of environmental analysis, biomedicine and archaeology. And it also forecasts its application in the study of crime investigation, opens a new window on analysis of gases , interface and antique.