Effect of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children     

赵正言  李荣  孙鹂  历志玉  杨茹莱 《Journal of Zhejiang University. Science. B》2004,(8)

INTRODUCTION Over the past few years, systematic studies onthe effect of lead exposure on the human body haveled to an understanding that lead is neurotoxic andhas adverse effect on the immune system. So far,however, research on the immunotoxic effects oflead has been limited to animal experiments andpeople with occupational exposure to lead (Shen etal., 1996; Mishra et al., 2003; Liu et al., 2000).Presently, there are no reports on the influence oflead exposure on lymphocyte and …  相似文献   

STUDY ON HUMAN EXPOSURE ASSESSMENT TO INDOOR/OUTDOOR AIR POLLUTANTS   总被引：4，自引：0，他引：4  

曹梦霞  林盛  刘金兰  张林  孙咏梅 《天津大学学报(英文版)》1997,(2)

实验设计了人群活动与室内污染状况调查，其内容包括：被调查者家庭生活环境、家庭成员个人活动、个人嗜好；工作环境情况及被调查者本人的生活、工作和活动环境对健康影响的主观评价等．结果表明，城市居民一天在室内环境度过的时间约占全天时间的８４％以上．同时参考国内外室内／外空气污染研究结果，选取４种主要空气污染物——一氧化碳（ＣＯ）、甲醛（ＨＣＨＯ）、可吸入性颗粒物（ＩＲ）和苯并［ａ］芘（Ｂａｐ）等进行了现场测定．给出不同微环境，即家庭室内环境，非家庭室内环境、封闭交通工具内、室外交通环境、其它室外环境中４种典型污染物的人体暴露量估计值．实验表明，４种空气污染物在家庭室内环境中的人体暴露量分别为：７１．０％，６０．３％，６９．４％，７４．０％．由此可以看出，在大气污染对人体健康影响的研究中，室内环境的影响不容忽视．  相似文献   

Examining environmental learning experiences at an earth education summer camp     

Adam Cheeseman  Tarah Wright 《Environmental Education Research》2019,25(3):375-387

Many barriers restrict children’s access to nature resulting in negative consequences, including a lack of opportunities to learn and engage with the natural environment. Fortunately, environmental education programs offer participants an opportunity to counteract these challenges. While the benefits of environmental education as measured by pre-determined outcomes are well documented, research focused on participants’ perceptions and preferences related to their environmental learning experiences continues to be under-represented in the literature. Using a pre-/post-test survey approach, this study aimed to explore how an earth education summer camp, Sunship Earth ^TM, contributed to participants environmental learning experiences. Results suggest that Sunship Earth ^TM provides children with various EL opportunities that help to increase their understanding of some ecological concepts. Results also suggest that this learning experience may have helped to broaden participants’ understanding of environmental issues and actions, as well as enhance feelings of care, interest, and responsibility towards the environment.  相似文献   

监事会与独立董事制度的功能比较及其价值取舍   总被引：3，自引：0，他引：3  

张建伟  向景 《漯河职业技术学院学报》2002,1(1):52-57

本文针对我国上市公司治理失灵的现象比较了德国、英国、美国、日本的公司内控机制 ,发现这些国家由于法律文化、历史传统不同 ,其公司的内部控制机制尽管形态各异 ,但这些不同的内部控制机制的功能是同质的 ,都是为了控制内部人控制。接着文章对独立董事制度和我国的监事会进行了分析 ,认为我国的监事会控制在立法上存在的明显缺陷是上市公司治理失灵的重要原因之一。笔者同时对董事制度进行了法律移植方面的法理分析 ,认为我国在公司法未修改前不存在独立董事制度生成的司法解释或部门解释的条件。文章最后对我国的监事会和相关有监督功能的制度提出了若干优化和创新的政策建议  相似文献   

State Power,Symbolic Capital,and the Hierarchy and Homogeneity of Higher Education in China: In the Example of Three Key Universities Policies After the Founding of New China     

Li Xiaohong 《Chinese Education & Society》2019,52(3-4):208-230

Abstract

The structure of higher education in China is characterized by a high degree of hierarchy as well as strong homogeneity, differing from not only American higher education, which features a high degree of both hierarchy and heterogeneity, but also higher education in continental Europe, which exhibits a low degree of hierarchy. Previous studies have provided analysis of the structural characteristics of higher education in the United States, Europe, and elsewhere, as well as their differences, but have been unable to explain the situation in China. Drawing on Pierre Bourdieu’s field theory, this article proposes an explanatory model for the field of higher education as shaped by state power. The state created various forms of symbolic capital linked to economic capital in the field of higher education, and monopolized the quantity in which and means by which these are bestowed, thus causing differentiation in the total amount and composition of symbolic capital and economic capital between different schools, and forming a steeply stratified structure. The bestowal of symbolic capital was not restricted to a particular group of institutions of higher education: instead, the scope of this bestowal was gradually expanded, such that the vast majority of institutions of higher education regard the acquisition of symbolic capital and its attendant economic capital as the objective in their endeavors, resulting in the development of strong homogeneity between institutions. The article applies field theory to three key universities policies after the founding of New China, to describe and analyze the influence of symbolic capital on the field structure of higher education in China.  相似文献   

论梁晓声九十年代以来的小说创作特色     

张延国  熊宝莲 《黄冈职业技术学院学报》2003,5(3):14-19

本文通过对梁晓声八十年代和九十年代以来小说创作的比较,概括出梁晓声九十年代以来小说创作的四个特征:世俗化、现实性、批判性的平民形象;泛道德化倾向;概念化、理念化的创作倾向;炫耀的矫情的自我暴露、自我剖析。  相似文献   

教育"比较"悖论     

龙宝新  栗洪武 《三门峡职业技术学院学报》2003,2(2):13-15

比较概念作为比较教育学科的立根之本亟需反思和创新。走出仅仅关注静态现象区分、排斥异质比较、否定教育现象内比较的陈腐逻辑,构建融现象比较与本质比较、同质比较与异质比较、内比较与外比较为一体的全新比较观是比较教育学科繁荣的重要选择。  相似文献   

College in the media: the relationship between repeated exposure and college expectations     

Roland Nuñez 《Educational Media International》2018,55(1):1-14

Media consumption can influence viewer perceptions and attitudes. Recent research on media’s effect on college students has failed to address gender differences. Using Mere Repeated Exposure Theory (traditionally used in marketing research), this study aims to answer three research questions regarding college media consumption and college perceptions: What types of fictional college media do college students consume? How does college media consumption differ by gender? How does fictional college media consumption relate to perceived college expectations? Results suggest that college students who consume high amounts of fictional college media are more likely to have positive attitudes towards partying and socializing in college. High consumers of college media, however, do not believe that college media influences their college perceptions. Men are more likely to socialize in college and are more aware than women that college media influences their college perceptions. Women are more likely to believe that college is difficult regardless of media consumption.  相似文献   

论国际私法性质的理论重构     

李煜婕 《四川师范学院学报》2007,(1):74-79

对于国际私法的性质，理论界历来持有不同的观点，国际私法诞生至今，从积极的意义上讲，这些观点在各个历史时期帮我们解读了国际私法。然而用发展的眼光来看，我们有必要将国际私法放在飞速发展的国际社会这个大环境下进行审视，并对其性质进行重新解读。明确其功能及效用，通过各国国内立法的变革以及国际统一立法的完善，促成其作用的完全发挥。同时完成国际私法的理论重构与国际私法的完整立法。  相似文献   

按揭贷款偿还方式选择与信息公开     

温福 《湖南城市学院学报》2004,25(5):103-104

债务偿还方式多种多样，但目前银行个人住房贷款偿还方式有等额本息和等额本金两种，不同的还款方式，消费者的利息支出有较大的差异。由于“信息隐藏”和“善意劝导”的原因，购房者所获知的还款方式信息仅限于等额本息方式。就此，应信息公开让购房者合理选取住房贷款偿还方式。  相似文献