Decomposition of cellulose to produce 5-hydroxymethyl-furaldehyde in subcritical water     

吕惠生  李向科  张敏华 《天津大学学报(英文版)》2008,14(3):198-201

A method for decomposition of cellulose to produce 5-hydroxymethyl-furaldehyde （5- HMF） in subcritical water-carbon dioxide binary system was proposed. A series of experiments were performed in a batch reaction vessel. Main products of the decomposition of cellulose are 5-HMF, furfural, levulinic acid and 1, 2, 4-benzenetrioI.The optimum condition for the preparation of 5-HMF was found as 523.15 K, 5.0% carbon dioxide mole fraction, and 30 min reaction time. The addition of carbon dioxide to water conduced to the decomposition of cellulose to 5-HMF. As can be seen from the distribution of the prod-ucts, the decomposition mechanism of cellulose is similar to the hydrothermal reaction of D-glucose and D-fructose.  相似文献   

对习语翻译中所反映的文化差异的研究     

高焕云 《渭南师范学院学报》2008,23(3):90-92

习语是一种语言的核心和精华,有着极强的表现力,汉英习语翻译中的形象处理至关重要。生存环境、生活习俗、宗教信仰及历史典故等的差异导致了汉英文化差异,翻译中应有所体现。  相似文献   

认知语言学范畴观与英语词汇学习     

刘淑容 《湖南大众传媒职业技术学院学报》2008,8(2):112-114

文章在阐释认知语言学范畴观的基础上,探索认知语言学范畴观对英语词汇学习的理论指导作用,并指出应该重视基本范畴词汇以及词汇的原型意义,遵循认知规律,科学有效地习得英语词汇。  相似文献   

学前教育专业新生化学认知结构的研究     

周军  李文娟 《安阳工学院学报》2010,9(1):123-125

以统计数据说明我省师范院校学前教育专业新生化学后进,其原因是:新生化学认知结构存在消极因素,研究表现为较差的原有知识水平、认知弱点和较低层次学习策略构成其不合理的认知结构,造成不当的学习方法。文章依此构建学生自主探究的研究性学习教学策略。  相似文献   

Looking for other stories: women's writing,Self-Respect movement and the politics of feminist translations     

K. Srilata 《Inter-Asia Cultural Studies》2013,14(3):437-448

ABSTRACT

The primary purpose of this essay is to survey the recent zombie craze in Northeast Asian films from Japan and South Korea. While the concept of the zombie may have originated in colonial Haiti, with its ghoulish images and supernatural lore, zombies were later imported to North America and reformulated as popular cultural entertainment by Hollywood. They are now flourishing in an East Asian cinematic context preserved in a globalized form. The films under investigation – I Am a Hero and Train to Busan – share similar cultural subtexts despite their incommensurable experiences of global capitalism in Asia and its latest ideological phase, neoliberalism. Both films critique the current neoliberal order and were nurtured by historical traumas experienced by both countries as well as the pandemic spread of viruses, both real and imaginary, that have ravaged the region. Nevertheless, the most prominent issue explored by Japanese and Korean zombie films is the continuity of society and its reproduction: as cultural artifacts of the neoliberal world, these films offer dystopian visions in which exploitation accelerates to such an extent that states cannot protect themselves against the viral and capitalist onslaught.  相似文献   

Understanding Examinees’ Responses to Items: Implications for Measurement     

Susan E. Embretson 《Educational Measurement》2016,35(3):6-22

Examinees' thinking processes have become an increasingly important concern in testing. The responses processes aspect is a major component of validity, and contemporary tests increasingly involve specifications about the cognitive complexity of examinees' response processes. Yet, empirical research findings on examinees' cognitive processes are not often available either to provide evidence for validity or to guide the design or selection of items. In this article, studies and developments from the author's research program are presented to illustrate how empirical studies on examinees' thinking processes can impact item and test design.  相似文献   

国家教育体制改革领导小组办公室负责人就教育体制改革试点有关问题答记者问     

张偲 《重庆第二师范学院学报》2011,24(3):16-18

日前，国务院办公厅印发了《关于开展国家教育体制改革试点的通知》（国办发[2010]48号），确定了国家教育体制改革试点的主要任务和试点单位，各地各校申报的国家级试点项目即将全面启动实施。针对社会各界广泛关心的教育体制改革试点有关问题，记者采访了国家教育体制改革领导小组办公室负责人。  相似文献   

The Elusive Notion of Creativity and Pedagogical Practice     

Paul Wagner 《Clearing house (Menasha, Wis.)》2013,86(5):204-205

Learning theories are essential for effective teaching in that they shed light on different aspects of the learning process. The spectrum of learning theories can be categorized into three main areas: behaviorism, cognitivism, and constructivism. Behaviorism as a teacher-centered instructional framework for a long time dominated educational settings, shaping every aspect of curriculum and instruction. In contrast to behaviorism, cognitivism is a relatively recent learning theory and its features are not well known or are confused with constructivism by teachers. This article aims to provide an overview of the core characteristics of cognitivism, its philosophical and theoretical basis, its implications for classroom practices, and its illustrative teaching methods. Cognitive apprenticeship, reciprocal teaching, anchored instruction, inquiry learning, discovery learning, and problem-based learning are explicated as the most distinctive methods of the cognitive perspective on learning.  相似文献   

Boundaries and Voices-     

《Journal of College Student Psychotherapy》2013,27(2):29-34

No abstract available for this article.  相似文献   

高职学生英语学习策略研究     

宣纳新 《泰州职业技术学院学报》2010,10(6):107-109

学习策略是为了提高学习效率,解决学习过程中所遇到的问题而作出的种种选择和采取的措施,它包括学习者的心理过程,也包括其具体行动。良好的学习策略是学生学好英语的关键,因而,英语教学应将对学生学习策略方法的研究与指导,纳入日常教学工作之中。  相似文献