速率法测定辣根过氧化物酶

本文介绍了一种速率法测定辣根过氧化物酶的方法。以对苯二胺和过氧化氢为底物经辣根过氧化物酶作用生成紫红色化合物.用440nm 单色光进行光电比色,每隔30秒钟记录一次吸光度值,直至3分钟为止。绘出吸光度时间关系曲线。求出斜率后,从标准工作曲线中查得样品中辣根过氧化物酶的含量。该方法可用于竦根过氧化物酶制备过程中每一操作步骤中酶的比活性测定。本法也可用于其他过氧化物酶的测定。     

Some grammatical rules are more difficult than others: The case of the generic interpretation of the masculine

In this paper we argue that the generic use of the masculine represents a grammatical rule that might be easy to learn but difficult to apply when understanding texts. This argument is substantiated by reviewing the relevant literature as well as the recent work conducted by the GREL Group (Gender Representation in Language) on the interaction between stereotypical and grammatical information in the construction of a representation of gender when reading role names. The studies presented in this paper show that the masculine form used as a generic to refer to persons of both sexes, or to persons of indefinite sex or whose sex is irrelevant, in gender marked languages is likely to be associated with its specific meaning (i.e., masculine refers only to men). This is true even though the generic nature of the masculine is a very common grammatical rule learnt at school. People may have learned this rule and may understand it, but may not readily apply it.     

A strategy for instructional television research

Conclusion In this article an empirical approach to instructional television research has been defined. This approach does not seek to replace theoretical studies but seeks rather to establish, within those institutions using instructional television, a body of knowledge based on empirical generalizations. Many authors have suggested the importance of defining objectives in assessing instruction, but their ideas filter only very slowly through educational systems. Part of this resistance may be traced to the complete revision of assessment instruments required by instruction by objectives, or standards. However, by asking the question, What happens during instruction? it may be possible to devise instructionally useful measures. Similarly, this question presents teaching, research, and production staff with a problem they may be eager to define and solve.     

Powerful knowledge: insights from music's case

This paper examines Young and Muller's elaboration of Michael Young's concept of powerful knowledge and considers music's alignment with the characteristics theorised as distinguishing this type of knowledge. Consideration of the concept in relation to music may be timely as music teachers continue to grapple with the problem of knowing what knowledge to include within the parameters of a school curriculum. The concept of powerful knowledge may provide us with a fresh way of considering what school music may have to offer in such a noisy and musically heterogeneous world. This curricular challenge, however, is by no means unique to music, even though it may be exacerbated in music which is so open to the forces of cultural change. I argue that access to this knowledge occurs by placing abstract concepts at the centre of curriculum conception as the means to mediate the space between everyday knowledge and the more vertical discourse of school knowledge. It is in this ‘academic’ space that students can come to understand and utilise music as a form of powerful knowledge, when epistemic understanding illuminates the experiential and aesthetic dimensions of musical experiences.     

A rubric for comparing dissimilar text materials

TechTrends - As you can see, this is a rather holistic view. These categories may have to be expanded depending on the particular needs of your task. However, it seemed to be efficient. This...     

基于Matlab的大学物理实验数据处理系统

利用Matlab的图形用户界面系统开发出了大学物理实验数据处理系统,该系统有一个友好的图形用户界面。通过该系统用户可处理10个大学物理实验的数据,该系统是开放的,用户可根据需要增加实验数据处理项目。该系统在Matlab 6.1版本下开发并测试,可用于工科大学物理实验数据处理的计算机辅助教学。     

Cultural Issues in Evaluation Studies of Middle Eastern Higher Education

Middle Eastern candidates for higher degrees often set out with proposals which include a significant element of evaluation of aspects of higher education. These may raise cultural issues. Fourth generation evaluation procedures take the cultural context seriously. This is likely to throw up potentially important issues for candidates and their supervisors. This paper illustrates these matters in the current context of Middle Eastern higher education. It discusses the role of evaluation studies in this field, together with issues which candidates and their supervisors may confront when carrying out such research studies there. National cultures may be approached as sites of cultural contestation. Some forms of evaluation research have a role to play in this     

English proficiency and academic success in international postgraduate education

In the Netherlands internationalization of higher education may lead to an increasing use of a foreign language-for example English-as the medium of instruction. This may raise the issue whether learning in a foreign language affects academic performance, given the language problems international students are faced with when studying abroad. The present article reviews research in this field and presents a study into the academic achievement of 90 Indonesian engineers. These subjects took a one-year English-medium postgraduate course at the International Institute for Hydraulics and Environmental Engineering in Delft. Language proficiency was measured by TOEFL and academic success was defined as the average score on seven written examinations. A most remarkable finding is the observation of a cut-off point in the relationship between English proficiency and academic success. This has led to the hypothesis that there is a range of TOEFL scores within which a better command of English increases the chance of being academically successful. The lower and upper limits of this range may vary according to academic discipline or may even be institution-specific. Additional findings are presented as well as implications and directions for further research.     

“有罪的喜悦”与“无罪的痛苦”——从女性、妻性、母性的角色冲突谈安娜悲剧的必然性

任何一个完整的女人,总要扮演女性、妻性、母性等三种角色。当这三种角色相互协调时,就会让女人感到满足和幸福;反之,当这三种角色相互发生冲突时,就会让女人感到不满和不幸,甚至导致悲剧。列夫.托尔斯泰《安娜·卡列宁娜》中的安娜就是典型的例证。试从安娜所扮演的女性、妻性、母性之间的角色冲突这一视角来分析安娜悲剧的必然性。     

Wounded Healers: Graduate Students with Histories of Trauma in a Family Violence Course

Social work students are witness to a variety of challenges from course content through scenarios, videos, role-plays, and field practice. Students may be vulnerable to experiencing vicarious traumatization from this exposure. Some students, however, may have personal histories of trauma and may therefore experience posttraumatic stress reactions due to triggering of past trauma through course content. This case study examines feedback from three graduate students from a family violence class who self-identified that they had personal histories of trauma from family violence. Their feedback can be beneficial to instructors in managing students' reactions that might be triggered from course content.     

Searching for Dumbledore: A reflection upon the outcomes of a tailored emotional literacy programme on three key stage 2 children

Some children may only be able to express feelings of anxiety, frustration, stress or sadness through angry behaviours, which may prove challenging for schools (Barnes et al., 2016; Shechtman and Tutian, 2016). This is problematic when considered in relation to research evidence highlighting the negative impact such behaviours may have upon social relationships and academic outcomes (Sloan et al., 2017). The aims of this study were to explore whether a tailored emotional literacy programme can be used effectively to extend children's emotional lexicon and strategies for the self‐management of behaviours. Three children with social‐emotional difficulties were taught in twelve weekly sessions. The findings from this study suggests the positive benefits of using a programme tailored to meet a child's specific needs (rather than a programme without any adaptations), which may be an effectual tool in supporting children to change established patterns of negative behaviours.     

Students' Assumptions and Professors' Presumptions: Creating a Learning Community for the Whole Student

This paper postulates that having students engage in albeit limited and flawed research is a more effective way of changing attitudes than lecture or discussion. A common goal of the introductory linguistics course is to instill healthy language attitudes, but there is little extant research on the pedagogy of linguistics indicating how this may be accomplished. This case study presents an experimental design that allows students to develop empathy for speakers of stigmatized dialects and serves simultaneously to introduce students to the scientific method and to reinforce the idea of linguistics as a science. It offers ideas that instructors in any discipline dealing with multiculturalism may be able to adapt.     

A Framing Primer for Community College Leaders

The purpose of this article is to be a tool for community college leaders, as well as campus members, to positively and effectively utilize framing on their campuses. The fictional case of Maggie Pascal at Midwestern Community College illustrates the process of framing the change of a new partnership with Wind Energy Corporation to internal stakeholders on campus. This case illustrates the importance of understanding context and frames before the action of framing can be activated. A leader can then decide which type of framing to utilize (i.e., step-by-step, vision, or connective) and which language tools will be most effective in framing. The ways a practitioner operationalizes framing is through symbolism, talking, walking, and writing (Eddy, 2010a). This idea of framing is an important skill leaders can proactively develop to support their campuses through change processes to enhance the likelihood for a successful change outcome. Also, this may benefit other campus members who may have the opportunity to frame meaning for others or to be involved in making sense of a leader’s framing.     

Juggling personal life and professionalism: Ethical implications for rural school psychologists

Rural communities often contain unique features that separate them from more urban communities. Although a body of research is devoted to ethical considerations for psychologists working in rural communities as a whole, much less current research is focused on working in rural schools. This paper specifically highlights ethical considerations regarding competence, multiple relationships, and confidentiality. Given that access to services within the community may be limited, school psychologists may encounter cases that are outside of their area of competence. Furthermore, due to the interconnectedness present in many rural communities, psychologists frequently have multiple relationships with those whom they have professional contact. Confidentiality may be compromised when families and school personnel also have multiple relationships. These factors must be considered by psychologists working in rural schools, and steps must be taken at the outset of practice to ensure ethical compliance. More specific means of obtaining this compliance are discussed in this paper.     

Understanding Nonsocial Play in Early Childhood

Nonsocial play continues to be perceived as a behavior that is detrimental young children’s development. The research evidence in this area is mixed but lends itself to a more positive view of nonsocial play. Despite the substantial amount of literature available, the terminology used fails to be consistent and may prove to be distracting and confusing to practitioners and caregivers. This paper reviews the current literature on young children’s nonsocial play. Distinctions among different types of nonsocial play are identified, as well as some reasons children engage in these activities. By developing a better understanding of the role of nonsocial play in early childhood, caregivers may better understand when children need their help in promoting more social types of play and when intervention may or may not be necessary.     

In a silent way: student perceptions of silence in community

Abstract

This paper explores young people’s perceptions of the role and value of shared ‘gathered’ silence in the corporate life of a school community. It draws on a small-scale qualitative investigation in a Quaker school setting. There may be particular things to learn about the practice of stillness and silence inherent in the ethos of a Quaker school. The silence referred to in this discussion of its value in schools is a rich, positive ‘strong’ type of silence. This study suggests that shared silent spaces can be both personal and interpersonal. In terms of the former, they may offer valuable opportunities for young people to be still and open to their inner life. Regarding the latter, interpersonal shared community silence may enhance a sense of closeness and connection to one another and perhaps offer some opportunity for freedom from the intrusion of the ‘noise’ of everyday life and the demands of others.     

International Testing in Geography: comparing students' achievements within and between countries

Interest in international testing in geography has been growing since the early 1990s. This paper outlines one project in this area, “InterGeo”, and the problems inherent with such testing. The main findings are that instruments used in international testing in geography may lack validity as they are not embedded in the geography curriculum and experiences that they are endeavouring to test. Furthermore, experience in international testing from other, ‘core’ curriculum areas, notably mathematics and science, provide valuable insights to a number of practical and technical issues which cannot be ignored. This paper argues that despite shortcomings and difficulties further development of international assessment in geography may prove worthwhile. However, the purpose and use of InterGeo, in a future manifestation, needs careful definition. The publication of the International Charter on Geographical Education (IGU, 1992) may be of significant help in fulfilling this task as the InterGeo project develops.     

Professional Preparation: A Process of Discovery

Preparing prospective physical educators is a challenging task. The development of a “human service educator” may be the key to the direction of professional preparation. Teacher education must be seen as a process of becoming, of personal discovery. This self-awareness leads to growth, change, and full functioning. In achieving this growth, four guidelines may be valuable: increased autonomy; more adequate assumptions about reality, possibility, and value; improved competencies; and increased awareness and openness to experience. Prospective physical educators must be put in the position to achieve success, feel competent, and be aware of their potential.     

Internationalisation or Indigenisation of Educational Management Development? Some issues of cross-cultural transfer

Recent years have seen significant shifts in thinking about the most effective approaches to educational management development, with many common themes to be found in discussion and practice worldwide. The internationalisation of models and materials may not be surprising in an increasingly global culture; however it is debatable as to whether this is altogether desirable. This article seeks to fuel such a debate. It opens with a brief overview of recent trends in the West and less-developed countries (LDCs) and then considers international experiences in related areas, including management development and distance education. This broader framework helps in identifying key questions of cross-cultural transfer which are then used to assess the legitimacy of transferring models such as school-based management self-development from one cultural context to another. It is suggested that whilst some form of indigenisation of educational management development and materials may be most appropriate, the knowledge base on which to base such a strategy remains limited. National, international and comparative studies could help inform activities in this area.     

统计光度误差及其在光度法中的应用(英文)

本文研讨了统计光度误差,统计光度误差的定义是△C/C=1/(-㏒T_(平均))㏒[(T_(平均))/((T_(平均))-|ts/n~(1/2)|)]当它对T％作图,可得分光光度法统计光度误差曲线,实验原始数据通过曲线拟合以PC—1500A型计算机绘出统计光度误差曲线,并详细地研讨其应用。诸如应用于评价分光光度计,比较仪器,以及确定分析方法最小随机误差时光度测量的浓度范围。 本文根据统计光度误差原理,提出用于光度法检量线进行实验作图,结果与回归作图相同。