排序方式: 共有55条查询结果,搜索用时 15 毫秒
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Azim Akbarzadeh Dariush Norouzian Ali Farhangi Mohammad Reza Mehrabi Shirin Jamshidi Davood Zare Morvarid Shafiei 《Indian journal of clinical biochemistry : IJCB》2008,23(1):57-61
Flow cytometry has been employed as a method to study homogeneity of isolated islet subpopulations. After collagenase digestion
of rat pancreas and elutriation of tissue fragments, islets were isolated and dissociated, and cells were analyzed and sorted
according to their low forward angle light scattering properties by using automated flow cytometry. A standardized procedure
was developed for the preparation of rat islet cell grafts for purification of islet cells. In this process, after collagenase
digestion of pancreas, islets were isolated, dissociated, identification by dithizone method and then with enzymatic procedure
by DNase and trypsin, the islet cells changed into single cells and beta cells were identified by immunofluorescence method
and then assayed by flow cytometry. Methods have been developed for the preparation of suspension of viable rat pancreatic
islet cells and their analysis and sorting in the fluorescence activated cell sorter (FACC IV, Becton Dickinson, Sunnyvale,
Ca). Flow cytometry of these cells indicated that there were 91% of beta cells in cell suspension. Most of the exocrine particles
were lost during digestion. Purified endocrine islet cell grafts were prepared by pure beta-cells, without endocrine non-beta
cells. The purified aggregates were devoid of endocrine non-beta cells and damaged cells. 相似文献
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Eiman M. Abdel Meguid Claire F. Smith Amanda J. Meyer 《Anatomical sciences education》2020,13(3):343-352
Students' motivation is a vital determinant of academic performance that is influenced by the learning environment. This study aimed to assess and analyze the motivation subscales between different cohorts (chiropractic, dental, medical) of anatomy students (n = 251) and to investigate if these subscales had an effect on the students' anatomy performance. A 31-item survey, the Motivated Strategies for Learning Questionnaire was utilized, covering items on intrinsic and extrinsic goal orientation, task value, control of learning belief, self-efficiency for learning and performance, and test anxiety. First-year dental students were significantly more anxious than chiropractic students. Second-year chiropractic students attached more value to anatomy education than second-year medical students. The outcome of this research demonstrated a significant relationship between first- and second-year chiropractic students between anatomy performance and motivation subscales controlling for gender such as self-efficacy for learning and performance was (β = 8, CI: 5.18–10.8, P < 0.001) and (β = 6.25, CI: 3.40–9.10, P < 0.001) for first year and second year, respectively. With regards to intrinsic goal orientation, it was (β = 4.02, CI: 1.19–6.86, P = 0.006) and (β = 5.38, CI: 2.32–8.44, P = 0.001) for first year and second year, respectively. For the control of learning beliefs, it was (β = 3.71, 95% CI: 0.18–7.25, P = 0.04) and (β = 3.07, CI: 0.03–6.12, P = 0.048) for first year and second year, respectively. Interventions aimed at improving these motivation subscales in students could boost their anatomy performance. 相似文献
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Muhammad M. M. Abdel Latif 《International Journal of Research & Method in Education》2019,42(2):111-123
Research comparing the use of retrospective interviews (RIs) and think-aloud protocols (TAPs) as two data sources of writers’ composing processes is almost nonexistent. Trying to address this research gap, the present study examined the data obtained from the task-specific RIs and TAPs about the composing processes of 30 second language (L2) writers. Each participant thought aloud by concurrently verbalizing thoughts while performing an argumentative writing task, and then was interviewed immediately after the think-aloud session about their composing processes. The RI and TAP data was analyzed and compared in terms of five aspects of L2 writers’ composing: pre-writing stage, while-writing planning, first language (L1) use, composing problems and problem-solving, and text reviewing and changing. Though the results generally indicate that concurrent verbalizations provide much richer data than RIs about L2 writers’ composing processes, RIs were found to be a valuable source for revealing the ‘why’ of such processes. Besides, the gap between the data provided by the two sources differed from one composing aspect to another. Recommendations for how to optimally combine and make use of the two data sources in writing process research are provided. 相似文献
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OBJECTIVE: To establish the nature and extent of maltreatment experiences, coping strategies, and behavioral/emotional problems, and their relationships, in a sample of Palestinian adolescents. METHOD: A study of 97 male adolescents aged 15-19 years, and attending a vocational training center based in the Gaza Strip. Adolescents completed the Child Maltreatment Schedule and the Ways of Coping Scale (WAYS). The Strengths and Difficulties Questionnaire (SDQ) was completed by adolescents and by their teachers. RESULTS: Findings revealed high rates of emotional and physical maltreatment. Reliance on emotion-focused or avoidant coping strategies was associated with exposure to maltreatment. Use of maladaptive coping also predicted emotional difficulties in the respondents. CONCLUSIONS: Coping strategies are an important indicator of psychosocial functioning in adolescents who have experienced maltreatment. Identification of coping styles can augment the assessment of at-risk adolescents. Emotion-focused strategies, in particular, appear to be widely used by young people from non-Western cultural backgrounds. 相似文献
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Abdel Moneim Mohamed Osman 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1981,27(4):483-495
This paper examines the work done in the field of comparative education in the Arab region and analyses its conceptual and theoretical assumptions. It also analyses the work done by the Arab League Educational, Cultural and Scientific Organisation (ALESCO). The author argues that there is very little influence from sociology on the comparative education research carried on in the Arab region, though there is some influence from the functionalist school. There is heavy reliance on the economics of education, especially in the work of those utilising the concept of human capital. Most of the research carried out is practice-oriented research, aiming at policy formation and the provision of factual data for policy-makers, and mainly concerned with the internal working of educational systems in the Arab region.
Zusammenfassung Dieser Artikel untersucht die auf dem Gebiet der vergleichenden Erziehungswissenschaft in der arabischen Region geleistete Arbeit und analysiert ihre konzeptuellen und theoretischen Voraussetzungen. Außerdem werden die Tätigkeiten der Educational, Cultural and Scientific Organisation der arabischen Liga (ALECSO) analysiert. Es wird festgestellt, daß die Soziologie sehr wenig Einfluß auf die vergleichende erziehungswissenschaftliche Forschung in der arabischen Region ausgeübt hat; nur die funktionalistische Schule hat sich bis zu einem gewissen Grade ausgewirkt. Starker Nachdruck liegt auf der Bildungsökonomie, vor allem in der Arbeit von Wissenschaftlern, die das Konzept menschliches Kapital benutzen. Überwiegend ist die betriebene Forschung praxis-orientiert. Ihr Ziel ist, zur Erarbeitung einer Bildungspolitik beizutragen und den Bildungspolitikern faktisches Material zu liefern. Daher befaßt sie sich hauptsächlich mit dem internen Erziehungswesen der betreffenden Länder in der arabischen Region.
Résumé Cet article examine le travail effectué dans le domaine de l'éducation comparée dans les Etats arabes et analyse ses présomptions conceptuelles et théoriques ainsi que le travail de l'Organisation Arabe pour l'Education, la Culture et la Science (ALECSO). L'auteur soutient que la sociologie n'exerce qu'une influence très restreinte sur la recherche concernant l'éducation comparée menée dans les Etats arabes, quoique l'on y constate une certaine influence de l'école fonctionnelle. On place une grande confiance dans l'économie de l'éducation, surtout dans le travail de ceux qui utilisent le concept de capital humain. La majeure partie de la recherche est orientée vers la pratique, visant à l'élaboration d'une politique d'action, à la fourniture de données factuelles aux décisionnaires, et elle s'intéresse surtout au travail interne des systèmes d'éducation dans les Etats arabes.相似文献
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ABSTRACT The study aims to explore attitudes of the United Arab Emirates University students towards the handicapped. A sample of 313 students, conventionally drawn, took the College Students' Attitude Scale towards the Handicapped. Statistical analysis revealed significant differences in favour of females vs males, single vs married, residents vs non‐residents, families with handicapped children, previous contact with handicapped and urban vs rural groups. Several recommendations are suggested at the end of the study. 相似文献
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Maha Al-Qura'n Abu A. Haikal Abdel M. Razeq M. Shalabi N. Fathi Abu S. Ghoush 《Educational Action Research》2013,21(3):395-411
In March 2000, a researcher from the Al-Qattan Centre for Research and Educational Development, five pre-service teachers from the UNRWA (United Nations Relief and Works Agency) Educational Science Faculty (ESF), and one in-service teacher collaborated through action research to implement the curriculum inquiry cycle to a sixth grade geology unit for the purpose of improving both the teaching and learning processes. The team considered the teachers' perceptions of their role, the proposed curriculum and the existing pedagogical problems in Palestine. The team collected data through recorded interviews, and videotaped teaching sessions. Supplementary data was gathered from diaries, worksheets, lesson plans, and written tests. The team then analysed the data qualitatively. The whole process consisted of a two-month preparation phase and a three-week implementation phase. Despite the time constraints, in the preparation and implementation of this case study and the previous passive teacher training, the team observed significant improvement in classroom climate, teaching methods, and students' motivation. Both the teachers and the researcher acquired effective means for unit development and teaching practices throughout the whole process 相似文献
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