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S.M.RAHIM A.G.MAZLAN K.D.SIMON J.P.DELAUNOY P.LAURENT 《Journal of Zhejiang University. Science. B》2014,(2)
研究目的:假腮的功能早已引起科学家兴趣,但还有待阐明。本文通过研究硬骨鱼类品种虹鳟鱼(Oncorhynchus mykiss)的假腮碳酸酐酶的免疫定位,来探讨假腮碳酸酐酶的生理功能。研究方法:免疫组织化学染色技术。重要结论:免疫组化结果显示碳酸酐酶分布在假腮细胞中,更精确地说是在其细胞顶端分布。细胞基底端、管状系统、毛细血管和柱细胞均无免疫染色。免疫细胞化学定位进一步验证了这些结果,并显示一部分是细胞质碳酸酐酶,其余的与细胞膜结构连接。此外,腔隙层未显示出免疫过氧化物酶的活性。本研究揭示了假腮碳酸酐酶的功能与细胞外介质有关,碳酸酐酶能干预传入神经纤维刺激机制。 相似文献
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The concept of masculinity has been critiqued either as an ideological effect of patriarchy or as a play of discourse. This occurs at a time when there is renewed interest in biologically reductive theories of gender, and in the context (in the UK) of public disquiet about boys' academic performance. This paper argues that while masculinity cannot be regarded as a foundational subject, the reality of the category 'masculinity' in the daily lives of students and teachers means that we have to take account of how it structures both the social and pedagogic life of the classroom. The paper demonstrates how an imagined sense of masculinity--the masculine social imaginary--appears as a reality in the boys' narratives of self. The paper also argues that while this masculine social imaginary provides the semantic logic of gender, it is in the moment-to-moment interactions that boys have to assert and seek recognition of themselves as male. 'Masculinity' continues to be a useful sociological concept. 相似文献
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WILLIAM E. SIMON 《Journal of Educational Measurement》1969,6(3):159-164
A study was undertaken for the purpose of evaluating the degree to which the scoring of vocabulary items might be influenced by the scorer's expectancies. 72 Ss were given the task of scoring 20 responses to items on the Vocabulary subtest of the Wechsler Intelligence Scale for Children (WISC). In the bright condition (n= 37) Ss were informed that the responses were those of a child reading far above his age level, while in the dull condition (n= 35) Ss were informed that the responses were those of a child reading far below his age level. It was found that the mean score assigned to the protocol by the Ss in the bright condition was significantly higher than that assigned by the Ss in the dull condition (p less than .05). Some factors regarding generalizability were advanced and discussed. 相似文献
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GEORGE B. SIMON 《Journal of Educational Measurement》1969,6(4):259-260
Criterion-reference as opposed to norm-reference applies to the scores from a test and not to the content or format of a test, hence it is proper to refer to criterion-referenced scores or measures and not to criterion-referenced tests. This concept of criterion-referenced measures is applicable to formative evaluation generally or whenever the objective is mastery of subject matter rather than discrimination among students. 相似文献
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CHRISTOPHER A. SIMON JIM R. CARR SESI M. McCULLOUGH SALLY J. MORGAN TED OLESON MARGRET RESSEL 《Assessment & Evaluation in Higher Education》2003,28(2):193-207
Student academic ethics is a serious concern for colleges and universities. The literature dealing with student academic ethics, however, focuses little attention on the possible connection between organizational characteristics and the efforts made by faculty to deter student academic ethics violations. In this case study analysis of faculty at a medium-sized university in the western USA, we found that the level of faculty institutional confidence is related to the use of formal deterrence strategies. Additionally, we found that female faculty members are less confident in the administration, but are only marginally less likely to use formal administrative approaches to manage academic ethics. 相似文献
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VICKI STRANGE ANN OAKLEY SIMON FORREST THE RIPPLE STUDY TEAM 《Gender and education》2003,15(2):201-214
This article examines young people's views about sex education and focuses specifically on their views about interaction in single- and mixed-sex groups. Analysis of data from a survey of 3355 young people (aged 15/16 years), carried out in 13 co-educational English secondary schools (as part of the RIPPLE study), showed that the majority of girls, and about one-third of boys, would like some or all of their sex education to be delivered in single-sex groups. Data from 15 focus groups were analysed to examine the reasons for these preferences. The way in which sex education lessons are 'gendered' was explored by examining young people's views about the ways in which particular aspects of sex education classes (including the characteristics of teachers, the content, teaching methods and age of students) influenced their responses and interaction in lessons. Interaction in single- and mixed-sex focus group discussions was also analysed to provide insight into how interaction about sexual health issues may differ in single- and mixed-sex groups. It is concluded that the views of these young people support the call for more sex education with girls to be delivered in single-sex groups. 相似文献