PowerPoint97在高等代数教学中的应用点滴

本文对使用PowerPoint 97制作高等代数教学课件以及使用计算机大屏幕投影教学进行了有益的探讨     

对我国优秀青年篮球运动员体能现状的调查与分析

本文通过对参加1998 年全国青年篮球联赛10 支男、女篮球队、118 名运动员的体能测试,揭示了我国优秀青年篮球队运动员体能现状,并将体能现状与中国篮球管理中心制定的测试体能标准进行了对比,提出了进一步完善测试项目和及格标准的建设性探讨意见     

Spirulina platensis aqueous extracts ameliorate colonic mucosal damage and modulate gut microbiota disorder in mice with ulcerative colitis by inhibiting inflammation and oxidative stress

Ulcerative colitis (UC) is a chronic and recurrent inflammatory bowel disease (IBD) that has become a major gastroenterologic problem during recent decades. Numerous complicating factors are involved in UC development such as oxidative stress, inflammation, and microbiota disorder. These factors exacerbate damage to the intestinal mucosal barrier. Spirulina platensis is a commercial alga with various biological activity that is widely used as a functional ingredient in food and beverage products. However, there have been few studies on the treatment of UC using S. platensis aqueous extracts (SP), and the underlying mechanism of action of SP against UC has not yet been elucidated. Herein, we aimed to investigate the modulatory effect of SP on microbiota disorders in UC mice and clarify the underlying mechanisms by which SP alleviates damage to the intestinal mucosal barrier. Dextran sulfate sodium (DSS) was used to establish a normal human colonic epithelial cell (NCM460) injury model and UC animal model. The mitochondrial membrane potential assay 3-‍‍(4,5-dimethylthiazol-2-yl)-2,‍5-diphenyltetrazolium bromide (MTT) and staining with Annexin V-fluorescein isothiocyanate (FITC)/propidium iodide (PI) and Hoechst 33258 were carried out to determine the effects of SP on the NCM460 cell injury model. Moreover, hematoxylin and eosin (H&E) staining, transmission electron microscopy (TEM), enzyme-linked immunosorbent assay (ELISA), quantitative real-time polymerase chain reaction (qPCR), western blot, and 16S ribosomal DNA (rDNA) sequencing were used to explore the effects and underlying mechanisms of action of SP on UC in C57BL/6 mice. In vitro studies showed that SP alleviated DSS-induced NCM460 cell injury. SP also significantly reduced the excessive generation of intracellular reactive oxygen species (ROS) and prevented mitochondrial membrane potential reduction after DSS challenge. In vivo studies indicated that SP administration could alleviate the severity of DSS-induced colonic mucosal damage compared with the control group. Inhibition of inflammation and oxidative stress was associated with increases in the activity of antioxidant enzymes and the expression of tight junction proteins (TJs) post-SP treatment. SP improved gut microbiota disorder mainly by increasing antioxidant enzyme activity and the expression of TJs in the colon. Our findings demonstrate that the protective effect of SP against UC is based on its inhibition of pro-inflammatory cytokine overproduction, inhibition of DSS-induced ROS production, and enhanced expression of antioxidant enzymes and TJs in the colonic mucosal barrier.     

制造业数字化转型评价指标体系构建与应用研究

依据架构理念,从价值、要素和能力维度构建制造业数字化转型参考架构,并基于参考架构给出评估制造业数字化转型发展过程的评估框架和评估指标体系,以指导和帮助企业数字化转型实践。     

赣县胡村舞龙的流变及对民俗体育文化的启示

通过对赣县胡村舞龙活动的变迁进行考察,旨在对我国民俗体育的发展提供理论上的借鉴。在城市化、现代化的进程下,本土性资源是民俗体育文化发展的基础,民俗体育组织是发展民俗体育文化的关键,意义结构的重构是民俗体育发展的根本出路,民俗体育在文化强国视阈下走现代化的道路是民俗体育发展的必然趋势。     

州市本科院校服务地方经济发展研究

州市本科院校服务地方经济社会发展,从根本上说就是州市本科院校主动为区域社会发展服务,自觉的融入到地方经济、社会的发展中,与其和谐发展,共生共荣,成为直接推动区域经济社会发展的动力,实现高校与区域经济社会间的双向互动合作。     

州市本科院校服务地方经济发展研究

州市本科院校服务地方经济社会发展,从根本上说就是州市本科院校主动为区域社会发展服务,自觉的融入到地方经济、社会的发展中,与其和谐发展,共生共荣,成为直接推动区域经济社会发展的动力,实现高校与区域经济社会间的双向互动合作。     

The Role and Nature of Literary Translation in Comparative Literature

Literary translation is in fact a kind creation for literature, which involves the translator’s understanding of the source-language work and the creation of the target-language work. It promotes the communication and interaction of the two literatures and now has become an indispensible existing form of comparative literature.     

从文化视角看中诗英译的意象补偿

中文诗歌意象丰富,译者在翻译时应将诗歌的文化意象忠实而准确地传达给译语读者,当译文的语言文化信息与原诗不符时,译者要采取适当的翻译补偿手段,使中国诗歌的文化意象为译语读者所知晓和接受,从而通过诗歌翻译传播了中国文化。     

The direct and indirect effects of motor competence on adolescents’ mental health through health-related physical fitness

ABSTRACT

Mental health is an important public health issue and up to one in five youth experience mental health problems. The primary purpose of this study was to examine the relationship among motor competence, health-related physical fitness and mental health outcomes in adolescents. A secondary goal was to test the direct and indirect effects of motor competence on adolescents’ mental health through health-related physical fitness. Participants were 279 adolescents (M_age = 12.49, SD = 0.89) recruited in the south-west region of the US Motor competence including volleyball, soccer, and ultimate Frisbee, were assessed using PE Metrics?. FITNESSGRAM® test battery was used to assess health-related physical fitness components. Students completed a survey measuring their depressive symptoms and health-related quality of life. Motor competence was significantly associated with components of health-related physical fitness (r ranged from ?0.15 to 0.38). The robust fit of the model supports the significant indirect effect of motor competence on mental health outcomes through health-related physical fitness (χ²/df = 39.92/25; CFI = 0.97; RMSEA = 0.046; 90% CI [0.02, 0.07]). The hypothesized conceptual model tested in this study provides insights into the potential interaction of motor competence and health-related physical fitness with adolescents’ mental health.