The Practical Way of Communist Party of China to Bring up and Assemble Young Talents in the Early Years of Reform and Opening up （1978-1989）

In 1978, China entered the era of reform and opening up. Faced the great depression, cultivating and assembling young talent became an important power to support rapid development of the country. The leadership of Communist Party led by Deng Xiaoping had a global sight, and began to reform higher education system, gradually cultivated and assembled the generation of young talents. This paper reviews the theoretical ideas and practical measures of Communist Party of China （CPC） to train and assemble young talents at the beginning of reform and opening up, analyzes and displays the particular and scientific method of young talents and the great achievements of young talents in this period. The paper consists of three parts, the practice of bringing up young talents, young cadres, young professional and technical personnel, and the modernization construction from young talents. These methods cultivate so many young talents as the pillars of state development, and the quality of youth increased rapidly. So many practical ways also have been used and influenced in China today, and these are not only the wealth for China, but also the important experience for the whole world.     

Trajectory Reconstruction Through Analysis of Trace Evidence in Bullet–Intermediate Target Interaction by SEM/EDX

Abstract:  A young male was shot to death by a police officer with a Chinese Type 64 7.62 mm pistol when he was dealing with an aggravated assault arising from a traffic accident. By using scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDX), trace deposits on the discharged bullet and the intermediate target, i.e., a concrete telegraph pole at the scene, were identified to be from each other. The result demonstrated the bullet causing the death ricocheted from the concrete telegraph pole before striking the victim, thus indicating the incident was accidental. The case report illustrates the evidential value of trace materials derived, respectively, from discharged bullets and intermediate targets in bullet–intermediate target interaction for trajectory reconstruction. In addition, it indicates that the SEM/EDX method with its nondestructive nature, compared to other methods, may be more helpful in certain situations in determining the origins of trace evidentially valuable deposits on substrates.     

小鼠皮肤切创愈合过程中FAP和α-SMA的表达

目的观察小鼠皮肤切创愈合过程中成纤维细胞激活蛋白（fibroblast activation protein,FAP）和α-平滑肌肌动蛋白（α-smooth muscle actin,α-SMA）表达的变化规律。方法应用免疫组织化学和West-ern印迹法检测小鼠皮肤切创后各个时间段FAP和α-SMA表达情况。结果免疫组化结果显示FAP与α-SMA在正常对照组及伤后1h组小鼠皮肤弱表达,伤后6h阳性细胞率开始升高,伤后5dFAP阳性细胞率达高峰,伤后3dα-SMA阳性细胞率达高峰,伤后14dFAP与α-SMA恢复至与对照组相同。Western印迹法检测显示FAP和α-SMA从1d起各个时间段均有表达,其中5d为FAP的表达高峰,3d为α-SMA的表达高峰。结论FAP可作为法医学皮肤切创形成时间的推断指标,α-SMA可作为损伤修复中后期的推断指标,FAP与α-SMA联合使用有望成为推断皮肤损伤时间的有效指标。     

SPME-GC-MS（SIM）对人体手部气味的分析鉴别

目的探讨对人体手部气味分析鉴别的方法。方法以玻璃珠为采样介质,采用顶空固相微萃取及气-质联用选择离子监测（SIM）法分别对不同人体手部气味中主要挥发性成分：醇、酚、醛、酮、酸、酯6类物质进行测定。结果除了酸类和酚类物质不能用作区别不同人体气味的指标性成分外,其它4类物质均可作为鉴别不同人体气味的指标性成分。     

Post-mortem investigation of calcium content in liver, heart, and skeletal muscle in accidental hypothermia cases

The identification of hypothermia as cause of the death was always quite problematic in the field of forensic medicine. The aim of the present study was to verify the determination of calcium content in post-mortem liver, heart, and skeletal muscle samples as the biochemical marker defining hypothermia as the cause of death. The study involved 43 autopsy cases in which the circumstances of death indicated the effects of overcooling. The control group consisted of material collected from the corpses of 30 persons who were not exposed to low temperatures but died due to technical injuries (n = 5), asphyxia (n = 6), intoxication with ethanol and other substances (n = 8), and acute myocardial infarction/ischemia (n = 11). The concentration of calcium in autopsy samples was determined applying flame atomic absorption spectroscopy. Our study showed no significant differences of calcium content in tissues of persons who died due to hypothermia, over those who died in normothermic conditions.     

红外线合成图像在变造文件检验中的应用与分析

在文件检验中,黑白红外线照相是一种检验变造文件的方法,然而,在某些情况下效果欠佳。为了提高检验的准确性,不妨可以应用红外线合成图像的方法。应用Photoshop图像处理方法,根据红外线彩色照相的感光原理和色彩再现过程,对数码照相机拍摄的可见光图像和红外线图像进行适当处理,即可生成红外线合成图像。这种图像可以反映字迹对可见光和红外线的吸收与反射情况,通过判断字迹颜色有否改变来检验书写色料的异同。由此可见,利用红外线合成图像方法检验某些变造文件,可以获得黑白红外线照相无法得到的检验结果,这对提高鉴定结论的准确性具有实际应用价值。     

图解“国家情报模式（NIM）”

国家情报模式（NIM）是英国警务实施的国家改革项目,该项目制定了一套比较科学的国家情报标准,2002年英国警察改革法案颁布了135个国家情报模式运行最低标准,可从NIM业务处理流程图上看,这些标准主要涉及11个方面。     

Classification and individualization of black ballpoint pen inks using principal component analysis of UV-vis absorption spectra

The technique of principal component analysis has been applied to the UV-vis spectra of inks obtained from a wide range of black ballpoint pens available in the UK market. Both the pen ink and material extracted from the ink line on paper have been examined. Here, principal component analysis characterised each spectrum within a group through the numerical loadings attached to the first few principal components. Analysis of the spectra from multiple measurements on the same brand of pen showed excellent reproducibility and clear discrimination between inks that was supported by statistical analysis. Indeed it was possible to discriminate between the pen ink and the ink line from all brands examined in this way, suggesting that the solvent extraction process may have an influence on these results. For the complete set of 25 pens, interpretation of the loadings for the first few principal components showed that both the pen inks and the extracted ink lines may be classified in an objective manner and in agreement with the results of parallel thin layer chromatography studies. Within each class almost all inks could be individualised. Further work has shown that principal component analysis may be used to identify a particular ink from a database of reference UV-vis spectra and a strategy for developing this approach is suggested.     

Detection of Mitragynine in Mitragyna Speciosa (Kratom) Using Surface-Enhanced Raman Spectroscopy with Handheld Devices

A simple, quick, selective, sensitive, and effective field-friendly method capable of being used by nonexperts has been developed for detecting mitragynine in Mitragyna speciosa (kratom) using surface-enhanced Raman spectroscopy (SERS). Over 100 samples and blanks (known to be either positive or negative for the presence of mitragynine) were examined in duplicate using five identical handheld Raman spectrometers, which provided a data set of over 1,000 examinations. Based on the results of these analyses, the method yielded a true-positive rate of 99.3%, a true-negative rate of 97.9%, a false-positive rate of 2.1%, and a false-negative rate of 0.7%. The average minimum detectable concentration (C_m) of mitragynine that reproducibly yielded a match for one of the library spectra on all five instruments was determined to be 342 ng/mL (ppb). This C_m value is a conservative estimate considering that the extraction process was not fully optimized by this study, which was not necessary since the C_m value achieved was well below typical mitragynine concentrations in kratom (1.3–2.3%). The method is ideal (i) for prioritizing samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify mitragynine and (ii) for field use at international mail facility (IMF) satellite laboratories to help interdict kratom and prevent this dangerous product from reaching the U.S. supply chain.     

Combined Collection and Analysis of Inorganic and Organic Gunshot Residues

Gunshot residue (GSR) analysis and their interpretation provide crucial information on a criminal investigation involving the use of firearms. To date, several approaches have been proposed for the implementation of a combined sampling and analysis of inorganic (IGSR) and organic GSR (OGSR). However, it is not clear at this stage if concurrent analyses of both types of residue might be detrimental to the analysis of IGSR currently applied in forensic laboratories. Thus, this work aims to compare and evaluate three different protocols for the combined collection and analysis of IGSR and OGSR. These methods, respectively, involve the use of a modified stub (with two halves, one for the detection of IGSR and the other for the analysis of OGSR); the sequential recovery of GSR with two stubs mounted with different adhesives (double-sided carbon tape and Tesa® TACK) and the sequential analysis of IGSR and OGSR from a single carbon stub following carbon deposition. The detection of IGSR was carried out using SEM-EDX, while OGSR analysis was performed using ultra-high-performance liquid chromatography–tandem mass spectrometry (UHPLC-MS/MS). Obtained results for experiments performed using Geco Sinoxid^® ammunition indicated that sequential analysis was the most suitable protocol for the combined collection and analysis of both IGSR and OGSR. A higher number of inorganic (characteristic and consistent) particles and higher concentrations of ethylcentralite, N-nitrosodiphenylamine, diphenylamine, and nitroglycerin were recovered with this method.