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과학탐구문제 개발 능력 가이드 적용 효과: 화학 예비교사 사례연구
정영은(Young-Eun Jung),천희진(Hee-jin Chun),김애정(Ae-Jung Kim),박영신(Young-Shin Park) 조선대학교 교과교육연구소 2012 敎科敎育硏究 Vol.33 No.1
The purpose of this study is to investigate the Chemistry preservice teachers abilities of developing inquiry questions through applications of inquiry questions development guide, improvement of preservice teachers inquiry question development abilities and analyze types in inquiry questions. Based on literature review related to scientific inquiry questions, the inquiry questions development guide used in this study are developed according to chemistry fields. 27 preservice teachers majored in chemistry participated in this study. In this study, proper inquiry questions suggested by them are comparatively analyzed in terms of level and accuracy . As a result, we can prove that the level and accuracy of inquiry questions after applying the questionnaires are improved more meaningfully than before. Developed questionnaires was effective on developing proper inquiry questions. For developing the inquiry question, the most frequently emerged types of questions by the preservice teachers were unexpected result(34%) , adjustment(20%), how to experiment(14%) , why-how(12%) , relationship between variables’ type (11%) in order. As a result of research for the preservice teachers who participated in the developing inquiry questions, preservice teachers also recognized that the questionnaire has positive effect to develop the inquiry questions. Since the inquiry questions developed by researcher could offer the guide that how the inquiry questions should be suggested to science teachers who teach scientific inquiry, I make a proposition that the inquiry questions should be involved in the professional development program and teacher preparation program.
SYED SAYEED AHMAD,천희진,Khurshid Ahmad,Sibhghatulla Shaikh,임정호,샤히드알리,한성수,허선진,JUNG-HOON SOHN,이은주,최인호 한국축산학회 2023 한국축산학회지 Vol.65 No.1
Cultured meat is a potential sustainable food generated by the in vitro myogenesis of muscle satellite (stem) cells (MSCs). The self-renewal and differentiation properties of MSCs are of primary interest for cultured meat production. MSC proliferation and differentiation are influenced by a variety of growth factors such as insulin-like growth factors (IGF-1 and IGF- 2), transforming growth factor beta (TGF-β), fibroblast growth factors (FGF-2 and FGF-21), platelet-derived growth factor (PDGF) and hepatocyte growth factor (HGF) and by hormones like insulin, testosterone, glucocorticoids, and thyroid hormones. In this review, we investigated the roles of growth factors and hormones during cultured meat production because these factors provide signals for MSC growth and structural stability. The aim of this article is to provide the important idea about different growth factors such as FGF (enhance the cell proliferation and differentiation), IGF-1 (increase the number of myoblasts), PDGF (myoblast proliferation), TGF-β1 (muscle repair) and hormones such as insulin (cell survival and growth), testosterone (muscle fiber size), dexamethasone (myoblast proliferation and differentiation), and thyroid hormones (amount and diameter of muscle fibers and determine the usual pattern of fiber distributions) as media components during myogenesis for cultured meat production.