排序方式: 共有20条查询结果,搜索用时 718 毫秒
1.
兰杜赫·爱德华·弗拉基米罗维奇 《公安理论与实践》2014,(3):79-82
俄罗斯内务部正在实施一项教育改革"路线图"计划,其任务之一就是要提高教育科学部的效率。近年来,圣彼得堡市在医学方面呈现出了相当多的科研成果,特别是脱氧核糖核酸(DNA)分子的系列特性的同一性认定。利用DNA鉴定技术,可以直接认定犯罪现场的血迹、精斑、毛发、唾液斑等生物检材是否为犯罪嫌疑人所留,从而为案件的侦破、诉讼提供有力的证据。DNA鉴定技术越来越广泛地运用于刑事侦查中,其在刑事侦查中的独特功效不容低估,但同时应当引起注意的问题是,DNA鉴定技术的作用也是有一定局限性的。 相似文献
2.
Several by-products in the hydrochloric acid hydrolysis of clonazepam, flunitrazepam and nitrazepam are isolated by a combination of TLC and HPLC. With mass and NMR spectroscopic methods the structures of the by-products are established. Some indications are given for possible modes of formation of the by-products. 相似文献
3.
4.
5.
South Asian women are a focus area for organisations such as the UN, World Bank and WHO, where violence against women severely constrains policy instruments such as the Millennium Development Goals. The field researcher is often invisible in research space, which informs policy in practice. Through critical reflexivity we rupture the silence on researcher vulnerability, foregrounding researcher resilience as the ethical compass in the research space of gendered violence. Through narratives of researchers as development actors in the river of corrosiveness involved in acid violence research, we offer a typology for researcher resilience for consideration in research designs for policy development. 相似文献
6.
目的:比较山豆根总碱两种含量测定方法,为山豆根提取工艺优选提供。方法:采用容量法和酸性染料比色法。结果:两种方法结果基本一致。结论:可任选一种方法进行山豆根提取工艺研究。 相似文献
7.
利用7例颅脑外伤死亡的健康青年尸体,在死后48h,环境温度18~24℃,空气相对湿度83~92%和实验湿度54~64%的条件下,检测肝脏、肾脏酶活性的变化。实验结果表明,肝脏乳酸脱氢酶(LDH)和L-苹果酸脱氢酶(MDH),随着死亡时间的延长,活性逐渐减低,48h近于阴性;而肾脏上述二种酶活性则在死亡后6h和24h出现高峰,36h开始下降;肝脏的酸性磷酸酶(ACP)亦于死后6h和24h出现高峰,36h开始下降。而肾脏此种酶在死后18~24h,有增高趋势。笔者认为上述酶活性的规律性变化有助于死亡时间的推断。应用二种以上酶活性的变化特点,能够较准确地判断死亡时间。 相似文献
8.
The application of p30 detection to casework analysis of seminal traces on vaginal swabs is reported and compared with the levels of acid phosphatase determined.A simple crossed-over immunoelectrophoresis system was used for batch identification of swab extracts using a commercially obtained anti-p30 serum.Positive p30 results were obtained in less than 20% of the casework swab extracts, but they provide conclusive proof of the presence of semen which is a substantial advantage over the quantitative determination of acid phosphatase. 相似文献
9.
A number of dyed polyamide, wool and silk samples were examined with plane polarized light on their dichroic behavior by optical light microscopy (OLM) and microspectrophotometry with plane polarized light (MSP-PPL). It was found that most of these acid dyed peptidic fibres possess dichroism, but these are weaker than the effects previously described for polyester fibres. The small effects may be not observed, especially for wool, but these can be measured using MSP-PPL.In the three peptidic fibre classes, for the first time, a so called “inverse dichroism” is observed which appears in the absorption spectra as a hyperchromic effect. 相似文献
10.
《Science & justice》2020,60(5):480-485
This study demonstrates how RGB color values from microscopic smears stained with the Periodic Acid-Schiff reagent under standardized microscopy conditions can be used to indicate the presence of vaginal secretions. Based on data obtained in the study, a numeric threshold determined from the sum of separate values for red, blue and green was determined to differentiate vaginal-based samples with other body fluids. Using this threshold, 55 of 57 vaginal-based samples tested positive for the presence of vaginal secretion. Conversely, 27 of 29 smears prepared from other body fluids yielded negative results. However, when graphing RGB sum values against a calculated RGB integer no overlap in data was obtained between all vaginal-based samples and other body fluid samples, clearly differentiating them. One-way ANOVA testing with a 95% confidence interval indicated that vaginal samples from different age groups showed no difference in RGB sum values. Similarly, the location that vaginal swabs were collected (from the outside of a condom or a vaginal swab) also showed no statistical difference using one-way ANOVA at 95% confidence. Furthermore, refrigerated test swabs aged up to 15 months showed no demonstrable differences. Pair-wise t-testing using RGB sum values, however, did show significant differences between vaginal samples and all other body fluids tested. Finally, the method successfully differentiated between pre-and post-coital penile swabs and finger swabs taken before and after digital vaginal penetration in anecdotal comparisons using the method. 相似文献