Physiologic Responses to Racial Rejection Images Among Young Adults from African-American Backgrounds

Physiologic reactivity to racially rejecting images was assessed in 35 young adults (10 males, 25 female) from African-American backgrounds using the startle probe paradigm. In a laboratory setting, participants viewed 16 images depicting racial rejection, racial acceptance, nonracial negative, and nonracial positive themes. While viewing these images, startling bursts of noise were presented and the magnitude of the eyeblink responses were measured. Results supported an attentional mechanism which suggests that, while viewing both racially rejecting and nonracial positive images, individuals may be so absorbed in processing the images that they appear less distracted by the startling noise. However, these patterns were only found for participants low in racial regard. Young adults who felt positively about their racial background did not exhibit differential processing of startle stimuli as a function of slide themes. Race-rejection sensitivity did not moderate startle reactivity. Developmental implications, particularly in light of coping with racial discrimination, are discussed.

How people organise cultural attitudes: cultural belief systems and the populist radical right

Political scientists generally agree that all individuals structure their cultural attitudes in the same unidimensional fashion. However, various populist radical right parties remarkably combine moral progressiveness with conservatism regarding immigration-related issues. This suggests that the structuring of cultural attitudes among the electorate may also be more complex than typically assumed. Applying Correlational Class Analysis to representative survey data, the study uncovers three cultural belief systems. For individuals adhering to an integrated one, all cultural attitudes are interdependent, as typically assumed. However, two alternative belief systems are also uncovered: intermediate and partitioned. In the latter, positions on one cultural attitude (e.g. ethnocentrism) are barely related to positions on others (e.g. rejecting Islam or opposing homosexuality). The existence of multiple cultural belief systems challenges the widely held assumption that all people organise their cultural attitudes similarly. Both political party agendas and individuals’ education level and religion appear key to understanding variation in belief systems.     

损伤皮肤中白三烯B_4含量测定与损伤时间推断

本文作者利用高压液相色谱,快速检测大鼠皮肤切创创缘组织中白三烯B_4含量。结果发现,生前各损伤时间组创缘中白三烯B_4含量明显升高,且在1小时内与损伤时间有一定线性关系;死后损伤标本未见白三烯B_4含量升高。由此表明白三烯B_4含量测定,对推断生前1小时内的损伤时间有重要价值。高压液相色谱能快速、准确地检测损伤组织中的白三烯B_4。     

PAP免疫组织化学技术检测血小板膜糖蛋白

<正> 血小板膜糖蛋白 GPⅠ_b 和 GPⅢa 在血小板粘附、聚集中起着极其重要的作用。为了直接检测组织中血小板粘附、聚集和血栓形成,我们建立了应用抗人血小板膜糖蛋白 GPⅠ_b和 GPⅢa 的单克隆抗体的 PAP 免疫组织化学技术,并首次对该技术在法医学中的应用进行了初步探讨。     

A novel histological technique for distinguishing between epithelial cells in forensic casework

There are a number of forensic cases in which the identification of the epithelial cell type from which DNA originated would provide important probative evidence. This study aimed to develop a technique using histological staining of fixed cells to distinguish between skin, buccal and vaginal epithelium. First, 11 different stains were screened on formalin-fixed, wax-embedded cells from five women. Samples were analysed qualitatively by examining staining patterns (colour) and morphology (absence or presence of nuclei). Three of the staining methods – Dane's, Csaba's and Ayoub-Shklar – were successful in distinguishing skin epithelial cells from buccal and vaginal. Second, cells were smeared directly onto slides, fixed with one of five fixatives and stained with one of the three stains mentioned above. Methanol fixation, coupled with the Dane's staining method, specific to keratin, was the only technique that distinguished between all three cell types. Skin cells stained magenta, red and orange and lacked nuclei; buccal cells stained predominantly orange–pink with red nuclei; while vaginal cells stained bright orange with orange nuclei and a blue extracellular hue. This staining pattern in vaginal cells was consistent in samples collected from 50 women aged between 18 and 67. Identification of cell type from unlabelled micrographs by 10 trained observers showed a mean success rate of 95%. The results of this study demonstrate that histological staining may provide forensic scientists with a technique for distinguishing between skin, buccal and vaginal epithelial cells and thus would enable more conclusive analyses when investigating sexual assault cases.     

大鼠皮肤挫伤修复过程中NF_κB P65表达的研究

目的探讨皮肤挫伤修复过程中,核转录因子(NFkB)P65在挫伤区不同时间表达的变化规律。方法 应用免疫组化技术对挫伤后0h、3h、6h、9h、12h、1d、3d、5d、7d、10d的大鼠皮肤挫伤组织中NFkB P65的表达进行研究。结果伤后3h,挫伤区内浸润的少量多核粒细胞的胞质中NFkB P65呈弱阳性表达,阳性率为(3.20％±0.15％);伤后6h,阳性表达增强,阳性率为(11.33％±0.88％);伤后12h,表达继续增强,阳性率(75.67％±0.82％);伤后1d,在浸润的几乎所有单核细胞和多核粒细胞的胞质和胞核中均可见NFkB P65呈强阳性表达,阳性率为(97.33％±0.88％),表达达高峰,以后逐渐下降。结论 大鼠皮肤挫伤修复过程中,NFkB P65在挫伤后的炎症反应中发挥重要作用;同时,NFkB P65在挫伤区内多核粒细胞,单核细胞及成纤维细胞中的表达呈规律性变化,可对挫伤时间的推断提供参考。     

Electoral colorism: Candidate skin color and list placement in Ecuador

To what extent does candidate skin color influence party list placement in proportional representation systems? While candidate skin color is increasingly understood to play an important role in politics, the extent to which it shapes electoral opportunities and outcomes remains unclear. In this paper, we investigate whether party elites in list proportional representation systems place darker-skinned candidates in lower, less advantageous list positions than their lighter-skinned copartisans. Drawing on party lists from Ecuador’s 2021 National Assembly elections and an original measure of candidate skin color, we find evidence that candidate skin color is a significant determinant of list placement. This finding indicates that party lists reinforce color-based inequalities in political representation and reveals that a candidate’s skin color shapes their chances of winning elected office.     

对归正人员回归社会中的社会排斥分析

归正人员在重返和融入社会的过程中遭受着经济、政治、公共服务和社会关系等多层面的社会排斥。导致社会排斥的原因除了来自社会结构和文化之外,还有归正人员自身的原因。为了消除社会排斥,我们必须确立前科消灭制度、改变人们对归正人员的偏见和提高归正人员的自身素质。     

DNA transfer during social interactions

Multiple DNA transfer has increasingly been brought up in court as potential means for the presence of the defendants DNA at the crime scene or on a piece of evidence. This has prompted several investigations into DNA transfer under very controlled and semi-controlled conditions, however little is published about DNA transfer in “uncontrolled” or real life situations.Here we examined the effects of multiple direct and indirect transfer of DNA within a small group of people and objects: three individuals participating in a social interaction of having a drink (jug of juice) together for 20 min. At the end of the tests all the surfaces of interest were sampled and analyzed.In many instances the last person or the only person to come in contact with the object was the main or the only depositor of the DNA detected on it. The jug was a clear vector for secondary DNA transfer. Interestingly, in many instances the participants acted as vectors for foreign DNA transfer.     

馆藏图书剔除刍议

结合馆藏图书剔除工作的实际,论述了馆藏图书剔除是馆藏图书建设必不可少的基础工作之一,应建立具体的业务部门、进行经常性的馆藏图书剔除工作。详细地阐述了馆藏图书剔除的理由,对馆藏图书剔除的错误认识和在馆藏图书剔除中,为减少风险所采取的安全措施。