桑叶配方颗粒物质基准研究

桑叶配方颗粒迄今尚没有统一的质量标准。为提升桑叶配方颗粒的内在质量,对其物质基准评价方法进行了研究。选取具有代表性产地的15批桑叶制备物质基准,采用高效液相色谱法,以芦丁、异槲皮苷、紫云英苷作为评价指标,确定桑叶物质基准的出膏率范围、标志性成分含量及转移率范围,采用超高效液相色谱法,建立物质基准UPLC特征图谱,并对其主要成分进行指认。结果表明:15批物质基准中,芦丁转移率为19.94%～34.05%,异槲皮苷转移率为11.67%～43.58%,紫云英苷转移率为10.73%～43.05%;物质基准特征图谱中,标定了14个共有峰,指认出7个色谱峰,分别为新绿原酸、绿原酸、咖啡酸、芦丁、异槲皮苷、槲皮素-3-O-(6″-O-丙二酰基)-β-D-葡萄糖苷、紫云英苷。所建立的基准评价方法为桑叶配方颗粒质量标准的制定及其后续大规模生产提供了数据基础。     

Factors affecting classroom participation and how participation leads to a better learning

The purpose of this paper is twofold. First, we analyze various course- and student-related factors that affect participation grades within several college accounting classes. The second purpose is to determine whether in-class participation grades have an effect on exam performance in these classes. We find that, unlike in liberal arts and sciences courses, in accounting courses, participation grades for female students do not differ from participation grades for their male counterparts, regardless of class level. Overall, course level and student major have no direct effect on participation grades; however, the accounting majors and students in the lower level courses have better attendance than do non-accounting majors and students in more advanced courses. We observe that class schedule, in particular class duration and semester, affects students’ participation performance. Lastly, we find that students who participate more in classroom discussions perform 25% better on exams than do those with lower participation grades. This relationship holds for the three elements of participation grading: frequency of participation, consistency of participation, and attendance.     

Impact of family income in early life on the financial independence of young adults: Evidence from a matched panel data

This study investigates whether the family income level in early life influences the financial independence of young adults. Using a large nationally representative U.S. sample (constructed based on the data from the 1999 to 2015 Panel Study of Income Dynamics, its 2009 to 2015 Transition to Adulthood Supplement and its 1997 to 2007 Child Development Supplement), we find that the relationship between one's family income level during adolescence and the financial independence of young adults follows an inverted U‐shape. We find that the college graduation status plays an important role in determining the financial independence of young adults. Once young adults graduate from the college, their financial independence is no longer influenced by their family income level during adolescence. The results show similar patterns after controlling for cognitive and noncognitive abilities and financial behaviours of young adults when they were children or teenagers. The findings of this study have significant implications for policymakers and educators.     

Who gets the job? First-generation college students' perceptions of employer screening methods

What are first-generation college students' (FGCS) perspectives of employment screening methods? The authors investigate which methods FGCS believe are likely to cause an employer to extend a job offer and which methods yield the best pool of job applicants. Survey data were collected from undergraduate business majors. They were analyzed using means comparisons and bivariate correlation t tests. FGCS perceived resumes and interviews as most likely to help applicants get hired. Implications are discussed.     

高校辅导员和大学生互建信任关系的重要性与实现途径

辅导员是高校学生管理工作中必不可少的中坚力量。辅导员与学生的关系是高校中最为突出和直接的人际关系,二者建立互相信任的关系尤为重要。论文分析了高校辅导员与大学生相互缺乏信任的表象,阐述其危害,进一步明确了互建信任关系的重要性,并从四个方面讲述了建立信任关系的实现途径。     

重大疫情下高校辅导员开展思想政治工作的五个着力点

新型冠状病毒感染的肺炎疫情防控过程中,高校大学生是一个不容被忽视的群体。抗疫是近期大学生思想政治教育工作的重中之重,事关大学生身心健康成长的根本利益,事关立德树人教育根本任务的实现。     

加强新时代高校宿舍舍长队伍建设,助力“00后”大学生成长成才

加强新时代高校宿舍舍长队伍建设,更有利于积极发挥高校宿舍育人阵地的作用,高校宿舍舍长在教育管理工作中的重要性不可忽视。论文提出从提高新时代宿舍舍长工作的站位、加强宿舍舍长的角色认同与培养、加强宿舍舍长管理机制的制度建设三个方面,加强高校宿舍舍长队伍的建设,助力新时代“00后”大学生的成长成才。     

Momentum and betting market perceptions of momentum in college football

Past research has demonstrated that bettors believe positive momentum carries over from contest to contest. This article examines whether there is any empirical support for this belief by testing for the presence of across-contest momentum effects in college football. We characterize momentum in multiple fashions and after controlling for between-team heterogeneity find no evidence that systematic relationships exist between the degree of momentum a team enters a contest with and the outcome of that contest. From a wagering market perspective, this indicates that there is no statistically significant advantage to betting on teams perceived to possess positive momentum. Our results also suggest that the combination of the opening betting line set by odds makers and the subsequent market movement of that line does not systematically overreact to teams on streaks.     

高职学生乡村振兴意愿与影响因素研究——基于广东交通职业技术学院的调研分析

乡村振兴战略是党的十九大提出的一项重大战略,其中人才振兴是乡村振兴的基础,但农村客观上存在很多难以短时间解决的困难,青壮年、大学生都倾向于留在大城市工作,人才紧缺已经成为限制农村发展的重要瓶颈,如何让更多的大学生参与助力乡村振兴中的研究具有重要的社会意义和现实意义。本文针对高职大学生群体进行研究,在“互联网+”时代背景下,分析了高职大学生的就业创业特点、参与乡村振兴的意愿动机,和内外部的影响因素等,试图寻找适合当代大学生投身乡村振兴的方法和模式,同时,也从大学生的角度提出了如何建立健全相关的国家、社会和学校的支持体系。     

The upward trend in women’s college-going: the role of teenagers’ anticipated future labour force attachment

This article focuses on the role of teenagers’ anticipated labour force participation in explaining the upward trend in U.S. women’s college-going. A simple conceptual model implies that individuals with more anticipated lifetime hours of work are more likely to invest in college education. My analysis using data from three National Longitudinal Surveys supports the theoretical implication. This finding, combined with the trend towards higher work expectations of young women across birth cohorts, may account in part for the upward trends in women’s college attendance and completion.