The changes of fourier transform infrared spectrum in rat brain

Estimation of the time since death (postmortem interval [PMI]) is one of the most difficult problems in forensic investigations, and many methods currently are utilized to estimate the PMI. The goal of this study was to investigate the changes of attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectra of rat brain from postmortem time 0-144 h. The intensity ratios of major absorbance bands were examined (I(1066)/I(1392), I(1168)/I(1392), I(1234)/I(1454), I(1301)/I(1392), I(1647)/I(2956), I(2921)/I(2850), and I(1647)/I(1539)). The spectra of rat brain displayed prominent changes with increasing PMI. The band at 2871 and 1737 per cm became weak with the time increasing and even disappeared at postmortem 96 and 72 h, respectively. A close linear correlation was shown between the relative absorption intensity and the PMI, and the I(1234) /I(1454) offered a stronger correlation (r = 0.973). Our results indicate that ATR-FTIR spectroscopy may be a useful technique for estimating the PMI.     

马克思主义大众化研究中需要注意的几个问题——以重庆市机关人员的调查问卷为基础

当前马克思主义大众化研究正处在拓展与反思相结合的阶段,反思的深度直接决定了今后研究的重点和方向。通过对重庆市机关人员的调查研究发现,马克思主义大众化研究中要重视下述四个问题：人民群众陷入马克思主义信仰危机的说法是对马克思主义大众化的重大误解;阻碍马克思主义大众化的重要因素不在理论界,而在于党内的腐败现象;与网络、广播、电视、动漫等显性载体相比,党员干部的工作作风这一隐性载体更为重要;在马克思主义大众化的宣传手段中除了要重视“术”的运用外。更要重视对“加强人文关怀”这一“道”的遵循。     

Getting Rich Before Getting Old or Vice Versa？

正REGARDING China’s economic and social outlook,there are two contending views in the domestic and overseas academic world.One predicts that China will get affluent before becoming an aging society,and the other holds the opposite opinion.A comprehensive and dynamic analysis is needed before reaching a conclusion.Complex Factors in Economic Growth Total Factor Productivity(TFP)is the most accepted measurement through which to judge total inputs’output productivity,that is,the ratio of total output to total inputs.TFP includes technological progress,organizational innovation,professionalism,etc.An increase of this index refl ects the progress of science and technology.High     

Application of Micro‐Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy to Ink Examination in Signatures Written with Ballpoint Pen on Questioned Documents

Questioned documents examined in a forensic laboratory sometimes contain signatures written with ballpoint pen inks; these signatures were examined to assess the feasibility of micro‐attenuated total reflectance (ATR) Fourier transform infrared (FTIR) spectroscopy as a forensic tool. Micro‐ATR FTIR spectra for signatures written with 63 ballpoint pens available commercially in Korea were obtained and used to construct an FTIR spectral database. A library‐searching program was utilized to identify the manufacturer, blend, and model of each black ballpoint pen ink based upon their FTIR peak intensities, positions, and patterns in the spectral database. This FTIR technique was also successfully used in determining the sequence of homogeneous line intersections from the crossing lines of two ballpoint pen signatures. We have demonstrated with a set of sample documents that micro‐ATR FTIR is a viable nondestructive analytical method that can be used to identify the origin of the ballpoint pen ink used to mark signatures.     

Hierarchical Cluster Analysis of Ignitable Liquids Based on the Total Ion Spectrum

Gas chromatography–mass spectrometry (GC–MS) data of ignitable liquids in the Ignitable Liquids Reference Collection (ILRC) database were processed to obtain 445 total ion spectra (TIS), that is, average mass spectra across the chromatographic profile. Hierarchical cluster analysis, an unsupervised learning technique, was applied to find features useful for classification of ignitable liquids. A combination of the correlation distance and average linkage was utilized for grouping ignitable liquids with similar chemical composition. This study evaluated whether hierarchical cluster analysis of the TIS would cluster together ignitable liquids of the same ASTM class assignment, as designated in the ILRC database. The ignitable liquids clustered based on their chemical composition, and the ignitable liquids within each cluster were predominantly from one ASTM E1618‐11 class. These results reinforce use of the TIS as a tool to aid in forensic fire debris analysis.     

A closer look at risk factors for public-private partnerships in Singapore: six case studies

ABSTRACT

Despite its global popularity over the past few decades, the public-private partnership (PPP) has not always led to successful outcomes, due largely to a number of risk factors associated with the projects. To explain how and why PPPs sometimes fail, this study considers the success-failure continuum of Singapore’s recent PPP experience from 2000 to 2019. After taking a critical, close look at the six failed cases, we identify the following latent risk factors: unstable financial capacity during the execution period of a project, force majeure unforeseen problems that arise, a lack of technical and/or financial foresight, poor corporate management (e.g. delays in construction and poor-quality service delivery), and an unfavourable investment environment stemming from the lack of a clear and supportive governance framework. In addition, we find that most risk factors tend to appear during the contract management (pre-operation) and project management (operation) phases. Such risks seem to drive the operational failure and subsequent contract termination of multiple unsuccessful PPPs, simultaneously (and sometimes sequentially) rather than in isolated fashion. All in all, this study offers for policymakers that better risk allocation and proper, mutual coordination between the public and private partners represent essential factors for PPP success.     

被伐树木整体分离痕迹检验中特殊特征和固有特征的运用

被伐树木形成的整体分离痕迹有其独特性,反映出特有的规律。本文介绍了在盗伐林木案件中,运用整体分离痕迹检验原理、方法,检验被伐树木分离面、分离缘的形态,检验其凸凹断茬特征、虫眼特征、裂纹特征、空心特征等特殊特征以及节子特征、年轮特征、木射线特征、树皮纹理特征等固有特征。特别是在两对应的锯断面之间木质完全缺失情况下,综合运用上述特征有针对性地检验,解决了部分被伐树木整体分离痕迹检验中分离痕迹能否作为同一认定证据、分离体是否原为同一整体的问题。文中所述对被伐树木上的特殊特征和固有特征的研究和运用,拓宽了被伐树木整体分离痕迹检验中特征标记的范围,为丰富被伐树木整体分离痕迹的检验方法提供了参考。     

Countervisions of Modernity: David Roberts,The Total Work of Art in European Modernism

David Roberts's The Total Work of Art in European Modernism extends and deepens the analysis of the counter-paradigm of redemptively inspired art to modernism's own pre-occupation with secularization. It addresses the imbalance in social and critical theory whereby progressive secular rationalization has been elevated to the sole logic of modernity, and the romantic redemptive tradition has been reduced to a marginal counter-enlightenment. The total work of art paradigm allows Roberts to demonstrate how the programme of modernity has been constituted by internal tensions and antinomies from the very beginning.     

In Search of Strategies to Face the Economic Crisis: Evidence from Greek Farms

This study examines the strategies – defensive or aggressive, individual or collective – undertaken by sheep farms in a Greek rural area in order to face the repercussions of the economic crisis and their effects on the productivity and economic performance of these farms. The article presents the results of a farm management survey conducted in 2010 and repeated in 2014 in northern Evros, Greece. The mix of strategies – mainly passive – adopted by farmers shows their confusion in the face of crisis conditions, which has resulted in reduced productivity, more use of family labour and a rise in collective actions.     

GFAP和VEGF在创伤性脑损伤中表达的研究进展

创伤性脑损伤是世界上导致死亡及残疾的主要原因之一。检测对中枢神经系统损伤有高度特异性和敏感性的生物标志物,可以在一定程度上反映损伤情况。胶质纤维酸性蛋白与血管内皮生长因子均可作为颅脑损伤的生物学标记物,其表达变化规律、峰值出现时间,与创伤性脑损伤的严重程度及损伤时间的推断密切相关,对于法医病理学具有重大意义。该文对胶质纤维酸性蛋白与血管内皮生长因子的分子生物学特性及其在创伤性脑损伤中的表达进行综述。