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Xin Zheng,Hongbiao Yin,Yuan Liu,Zheng Ke 서울대학교 교육연구소 2016 Asia Pacific Education Review Vol.17 No.3
The building of professional learning communities has been widely recognized as an effective strategy for schools wanting to improve student performance and enhance teachers’ professional capacity. This study explored the relationship between leadership practices and professional learning communities, with a particular focus on the mediating role of trust in colleagues within the context of mainland China. A total of 215 primary school teachers in a province of southwestern China participated in the study. The results showed that leadership practices and trust in colleagues had positive effects on five factors of professional learning communities, namely a shared sense of purpose, collaborative activity, collective focus on student learning, deprivatized practice, and reflective dialog. Trust in colleagues also mediated the influence of leadership practices on professional learning communities. The implications for facilitating professional learning communities in mainland China are discussed here.
Zheng-Fei Yan,Jian Guo,Feng-Hua Tian,Xin-Xin Mao,Yu Li,Chang-Tian Li 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.4
Schisandra chinensis has been used as traditional medicine. The structures of isolate active compounds (schisandrin B, deoxyschisandrin, schisandrin C) from S. chinensis were characterized by physical and spectroscopic analyses. Active compounds were tested for their potential to act as anti-melanogenesis or skin-whitening agents by their abilities to inhibit tyrosinase activity in the cell-free mushroom tyrosinase assay and cellular tyrosinase derived from B16 melanoma cells. The tyrosinase inhibitory activity was correlated to the inhibition of melanin productions in α-MSH-stimulated and unstimulated B16 cells. Cellular tyrosinase kinetics were analyzed and showed by Lineweaver- Burk plot. Schisandrin B was minimally cytotoxic (cell viability: 88.99% at 0.75 μM) and the IC50 value for suppression of mushroom tyrosinase activity was estimated as 0.6 μM. Zymography analysis demonstrated schisandrin B’s concentration-dependent effects and the kinetic analysis indicated schisandrin B’s noncompetitive-inhibitory action.
Manufacturing properties of γ-dicalcium silicate with synthetic method
Zheng-xin Chen,Han-seung Lee,Hyeong Kyu Cho 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.S1
γ-dicalcium silicate(γ-C2S) is known as a polymorphism of belite. Due to its high CO2 fixed capacity and the low CO2 emissionproduction process, γ-C2S has attracted more and more attention of researchers. For the further development of applicationofγ-C2S in building construction industry. In this study, we aim to investigate the method for synthesizing high purity of γ-C2S. The influence of different raw materials and calcination temperatures on the purity of γ-C2S was also evaluated. Several Cabearing materials were selected as the calcium source, the materials which’ s main component is SiO2 were used as the siliconsource. Raw materials were mixed and were calcined under different temperatures. The results reveal that the highest puritycould be obtained using Ca(OH)2 and SiO2 powder as raw materials. And for the practical application, a relatively economicsynthesis method using natural mineral materials- limestone and silica sand as raw materials was developed, by this method,the purity of the synthetic γ-C2S was 77.6%.
China`s Codification of Conflicts Law: Latest Efforts
( Zheng Xin Huo ) 서울대학교 법학연구소 2010 서울대학교 法學 Vol.51 No.3
This article provides a systematic introduction to and an in-depth analysis of the draft of the Act on Application of Laws in Civil Matters involving Foreign Elements (the Draft) which represents the latest efforts of Chinese scholars for codification of Chinese Conflicts Law and serves as a blueprint for the National People`s Congress to enact China`s first conflicts code. Part one of the article provides an overview of the status quo of Chinese private international law from the perspective of legislation, judicial practice and theory. Part two introduces the background and major features of the Draft. Part Three provides a comprehensive exegesis of the important issues of the Draft, and puts forward corresponding suggestions. In Part four, the article concludes that the Draft is, symbolically, a major achievement made by Chinese scholars, but still requires further improvement and modification.
Hu, Zheng-Hui,Lin, Yi-Wei,Xu, Xin,Chen, Hong,Mao, Ye-Qing,Wu, Jian,Xu, Xiang-Lai,Zhu, Yi,Li, Shi-Qi,Zheng, Xiang-Yi,Xie, Li-Ping Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.3
Objective: To evaluate the association between tea consumption and the risk of renal cell carcinoma. Methods: We searched PubMed, Web of Science and Scopus between 1970 and November 2012. Two evaluators independently reviewed and selected articles based on predetermined selection criteria. Results: Twelve epidemiological studies (ten case-control studies and two cohort studies) were included in the final analysis. In a meta-analysis of all included studies, when compared with the lowest level of tea consumption, the overall relative risk (RR) of renal cell carcinoma for the highest level of tea consumption was 1.03 (95% confidence interval [CI] 0.89-1.21). In subgroup meta-analyses by study design, there was no significant association between tea consumption and renal cell carcinoma risk in ten case-control studies using adjusted data (RR=1.08, 95% CI 0.84-1.40). Furthermore, there was no significant association in two cohort studies using adjusted data (RR=0.95, 95% CI 0.81-1.12). Conclusion: Our findings do not support the conclusion that tea consumption is related to decreased risk of renal cell carcinoma. Further prospective cohort studies are required.
정흠(Xin Zheng),허기(Qi Xu),고흥(Heung Kou) 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.15
목적 본 연구의 목적은 중국 대학생들의 심리적 자본이 학업성취에 미치는 영향을 조사하는 것이다. 심리적 자본과 학업성취도의 관계를 살펴봄으로써 심리적 자본이 학생들의 학업성취도에 미치는 구체적인 영향을 이해할 것이다. 본 연구는 대학, 학생 및 관련 이해관계자들이 학생들의 심리적 자본을 향상시키고, 학업 성과를 향상시키며, 전반적인 발전을 촉진하는 데 도움이 되는 효과적인 개입과 정책을 개발할 수 있는 통찰력을 제공하는 것을 목표로 한다. 본 연구를 통해 중국 대학생들의 심리적 자본이 학업성취도에 미치는 영향을 이해하는 분야에 귀중한 경험적 연구 증거를 제공하고자 한다. 방법 본 연구는 SPSS 25.0 통계 소프트웨어를 이용하여 475명의 대학생을 대상으로 심리적 자본과 학업성취도의 관계를 기술분석, 독립표본 t-test, 일원분산분석, Pearson 상관분석 및 회귀분석을 통해 분석하였다. 결과 대학생들은 서로 다른 인구통계학적 변수에 대하여 심리적 자본과 학업성취도의 변동성이 있었으며, 둘 사이에는 유의한 양의 상관관계가 있었고, 대학생들의 심리적 자본은 학업성취도를 예측하였다. 결론 그 결과를 보면 대학생의 심리적 자본은 학업성취도와 밀접한 관련이 있음을 알 수 있다. 대학들은 학업 성취도를 높이기 위해 대학생들의 심리적 자본을 향상시키기 위한 적절한 조치를 취해야 한다. Objectives The purpose of this study was to investigate the impact of psychological capital on academic performance among Chinese university students. By examining the relationship between psychological capital and academic performance, we will understand the specific impact of psychological capital on students' academic performance. This study aims to provide insights for universities, students, and relevant stakeholders to develop effective interventions and policies to help students enhance their psychological capital, improve their academic performance, and promote overall development. Through this study, we try to contribute valuable empirical research evidence to the field of understanding the impact of psychological capital on academic performance among Chinese university students. Methods This study used SPSS 25.0 statistical software to analyze the relationship between psychological capital and academic performance in 475 university students using descriptive analysis, independent samples t-test, one-way ANOVA, Pearson correlation and regression analysis. Results There was variability in psychological capital and academic performance among university students on different demographic variables, and there was a significant positive correlation between the two, and university students' psychological capital was predictive of academic performance. Conclusions From the results, it is clear that university students' psychological capital is closely related to their academic performance. Universities should take appropriate measures to enhance the psychological capital of university students so as to promote academic performance.