排序方式: 共有54条查询结果,搜索用时 500 毫秒
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Oskar Hansson Marianne Finnebraaten Ingebjørg Knutsen Heitmann Merete Ramse Mariam Bouzga 《Forensic Science International: Genetics Supplement Series》2009,2(1):189-190
In this study two types of synthetic swabs and one commercially available minitape were tested and compared with the currently used cotton swab. The results indicate that there is no major difference in performance between the swabs for recovery of trace samples, and that the minitape is better suitable for recovering from absorbent materials than swabs are. However, no statistical calculations were carried out due to the low number of samples in each category. 相似文献
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The study investigates the nature of public service motivation’s (PSM) relationship to employee work engagement. Using the Job Demands-Resource Model, the authors compare whether PSM as a resource is an antecedent to employee work engagement or has a buffering effect on job hindrances of perceived red tape in explaining employee work engagement. They surveyed 388 supervisors and managers in a public-sector organization in the United States. The findings support PSM as an antecedent along with perceived job influence and perceived procurement red tape to employee work engagement. 相似文献
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双面胶带是日常生活中常用的一种胶带,在许多案件中亦经常出现,显现其内侧粘面上的手印,对认定案犯具有重要的意义。由于其结构与其他胶带不同,所以用于显现普通胶带上手印的显现方法不适用于双面胶带。本文通过研究双面胶带转印在纸张等渗透性客体上的手印,来间接地显现双面胶带上的手印。 相似文献
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Goodpaster JV Sturdevant AB Andrews KL Brun-Conti L 《Journal of forensic sciences》2007,52(3):610-629
Comparisons of polyvinyl chloride electrical tape typically rely upon evaluating class characteristics such as physical dimensions, surface texture, and chemical composition. Given the various techniques that are available for this purpose, a comprehensive study has been undertaken to establish an optimal analytical scheme for electrical tape comparisons. Of equal importance is the development of a quantitative means for sample discrimination. In this study, 67 rolls of black electrical tape representing 34 different nominal brands were analyzed via scanning electron microscopy and energy dispersive spectroscopy. Differences in surface roughness, calendering marks, and filler particle size were readily apparent, including between some rolls of the same nominal brand. The relative amounts of magnesium, aluminum, silicon, sulfur, lead, chlorine, antimony, calcium, titanium, and zinc varied greatly between brands and, in some cases, could be linked to the year of manufacture. For the first time, quantitative differentiation of electrical tapes was achieved through multivariate statistical techniques, with 36 classes identified within the sample population. A single-blind study was also completed where questioned tape samples were correctly associated with known exemplars. Finally, two case studies are presented where tape recovered from an improvised explosive device is compared with tape recovered from a suspect. 相似文献
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Mark Barash M.Sc. Ayeleth Reshef M.Sc. Paul Brauner M.Sc. F.F.S.Soc. 《Journal of forensic sciences》2010,55(4):1058-1064
Abstract: The selection of the appropriate method of collection of biological material from crime scene items can be crucial to obtaining a DNA profile. The three techniques commonly used for sampling items are: cutting, swabbing, and taping. The tape sampling technique offers an advantage, in that it enables the collection of a potentially highly informative source of DNA, shed epithelial cells, from selected areas on crime scene items (the inside fingers of a glove, for instance). Furthermore, surface collection of biological material by taping reduces co‐sampling of known PCR inhibitors such as clothing dyes. The correct choice of tape for crime scene item sampling is important. Not all tapes are suitable for biological trace evidence collection as well as DNA extraction. We report on one tape that met both these criteria. Three different cases are presented which demonstrate the usefulness of adhesive tape sampling of crime items. Finally, the advantages of the tape collection technique are discussed and guidelines for preferred areas of tape sampling on various casework items are presented. 相似文献
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Stacey‐Ann Sterling M.S. Katelyn E. Mason Ph.D. Deon S. Anex Ph.D. Glendon J. Parker Ph.D. Bradley Hart Ph.D. Mechthild Prinz Ph.D. 《Journal of forensic sciences》2019,64(5):1475-1481
Biological evidence analysis from contact traces is adversely affected by low quantity and quality of DNA. Proteins in these samples contain potentially individualizing information and may be particularly important for difficult surfaces such as brass, where DNA may yield incomplete profiles. In this study, touched unfired brass cartridges were sampled using dry tape or wet swabs and analyzed by separating DNA and protein from the same collected material, thus producing both genomic and proteomic information. DNA recovery was similar for both collection methods, with tape yielding an average of 1.36 ± 1.87 ng and swabs, 1.34 ± 3.04 ng. Analysis by mass spectrometry identified 95 proteins, with the two collection methods showing no significant difference (p = 0.76) in the average number of collected proteins: 44.5 ± 10.9, (tape) versus 47.9 ± 20.4 (swabs). Proteins can be collected from fingerprints at levels necessary to provide identifying information, thus expanding information obtained from challenging evidence. 相似文献
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Bradley MJ Keagy RL Lowe PC Rickenbach MP Wright DM Lebeau MA 《Journal of forensic sciences》2006,51(3):504-508
Fracture matches are considered to be the strongest association achievable in forensic examinations of glass, metal, wood, plastic, paint, tape, and other trace evidence. Despite being fairly routine examinations, few publications exist to support their admissibility in court. This study was designed, using duct tape as the fractured medium, to determine the validity and error rate associated with conducting end match (fracture match) examinations on this material. Five test designs, which varied either the source roll of tape or manner of separation (torn or cut) from the roll, were administered to four analysts with instructions to examine the assigned test sets for end matches. If an end match was not identified by the initial analyst, the entire test set was independently evaluated by the remaining three analysts. Results indicated that while tape grade did not hinder end match identification, the manner of separation could affect results. 相似文献