<p style="text-align: justify;">The initial period of young teachers' careers is always significant in developing their professional capability. This is when teachers start coming into contact with practical teaching, which is more diversified than the theoretical training at the University. In this research, the authors propose a process of combining the Lesson Study model with the micro-lesson teaching method. This process helps young teachers, especially those working in the Northern of Vietnam, improve their planning and implementation of a lesson plan following the Lesson Study model. It has four steps: (1). Plan a Lesson Study; (2). Organize demo teaching and attend lessons; (3): Self-evaluate and discuss lessons; (4): Apply for practical teaching. The methodology research is carried out on 62 young teachers in Vietnam to measure the pre-impact and post-impact results. The results reveal that the researched group has made significant progress on their teaching performances (the average points for their capability of planning lessons have increased from 2.54 to 3.28 and the average points for their capability of implementing lesson plans have increased from 2.48 to 3.18). This development can be considered as an excellent experience to bring the Lesson Study model into Vietnamese schools to improve teaching sustainably.</p>
Rice is one of the most important crops in Asian countries such as China, Vietnam... Many recent reports indicate that the arsenic content in rice exceeds the threshold and affects human health. Studying of molecular mechanisms and finding the arsenic resistance genes in rice which is extremely important and urgent. In this study, we analyzed the transcriptional changes of arsenic-treated rice root cells during 24 hours by microarray technique. Results showed that a large number of the differentially expressed genes (720 genes). EasyGO and Mapman softwares are powerful tools in analyzing microarray data and classifying functional groups as well as the important metabolic pathways in the cell. Results of microarray analysis using EasyGO showed that 74 down-regulated genes related to cellular component, 200 up-regulated genes involved in catalytic activity, 93 up-regulated genes involved in biological processes as responding to environmental stress, and 64 detoxification-realted genes are increased expression such as cytochrome P450, Glutathione-S-transferase and UDP-Glycosyltransferase. Mapman's microarray analysis reaults also indicate that numerous of arsenic-tolerance genes of rice roots. These results support for searching indicated genes in the selection of As-tolerance rice varieties. Keywords Asen, EasyGO, Mapman, microarray, Oryza sativa L. References [1] S.K. Panda, R.K. Upadhyay, S. Nath, Arsenic stress in plants. Journal of Agronomy and Crop Science 196 (2010) 161-174. https://doi.org/10. 1111/j.1439-037X.2009. 00407.x.[2] M.A. Rahman, H. Hasengawa, M.M. Rahman, M.A Miah, A. Tasmin. Arsenic accumulation in rice (Oryza sativa L.): Human exposure through food chain. Ecotoxicology and Environmental Safety 69 (2008): 317-324. https://doi.org/10. 1016/j.ecoenv.2007.01.005.[3] K.A. Marrs, The function and regulation of Glutathione S-transferase in plants. Plant Mol Biol 47 (1996) 127-58. https://doi.org/10.1146/ annurev.arplant.47.1.127.[4] L.M. DelRazo, B. Quintanilla-Vega, E. Brambila-Colombres, E.S. Caldero ́n-Aranda, M. Manno, A. Albores, Stress proteins induced by Arsenic. Toxicology and Applied Pharmacology 177 (2001)132-148. https://doi.org/10.1006/taap. 2001.9291.[5] T.L. Huang, Q.T.T. Nguyen, S.F. Fu, C.Y. Lin, Y.C. Chen, H.J. Huang, Transcriptomic changes and signalling pathways induced by arsenic stress in rice roots. Plant Molecular Biology 80 (2012) 587-608. https://link.springer.com/article/10.10 07/s11103-012-9969-z.[6] O. Thimm, O. Bläsing, Y. Gibon, A. Nagel, S. Meyer, P. Krüger, J. Selbig, L.A. Müller, S.Y Rhee, M. Stitt, Mapman: a user-driven tool to display genomics data sets onto diagrams of metabolic pathways and other biological processes. The Plant Journal 37 (2004) 914-939. https://doi.org/10.1111/j.1365-313X.2004. 02016.x.[7] J. Hartley-Whitker, G. Ainsworth, A.A. Meharg, Copper- and arsenate-induced oxidative stress in Holcus lanatus L. clones with differential sensitivity. Plant, Cell and Environment 24 (2001) 713-722. https://doi.org/10.1046/j.0016-8025.2001.00721.x.[8] S. Mishara, A.B. Jha, R.S. Dubey, Arsenite treatment induces oxidative stress, upregulates antioxidant system, and causes phytochelatin synthesis in rice seedlings. Protoplasma 248 (2011) 565-577. https://doi.org/10.1007/s00709-010-0210-0.[9] M. Chabannes, A. Barakate, C. Lapierre, J.M. Marita, Strong decrease in lignin content without significant alteration of plant development is induced by simultaneous down-regulation of cinnamoyl CoA reductase (CCR) and cinnamyl alcohol dehydrogenase (CAD) in tobacco plants, The Plant 28 (2001): 257-270. https://doi.org/10. 1046/j.1365-313X.2001.01140.x.[10] T. Goujon, V. Ferret, I. Mila, B. Pollet, Down-regulation of the AtCCR1 gene in Arabidopsis thaliana: effects on phenotype, lignins and cell wall degradability. Planta 217 (2003) 218-228. https://doi.org/10.1007/s00425-003-0987-6.[11] C. Li, S. Feng, Y. Shoa, L. Jiang, X. Lu, X. Hou, Effects of arsenic on seed germination and physiological activities of wheat seedlings. Journal of Environmental Sciences. 19 (2007) 725-732. https://doi.org/10.1016/S1001-0742(07) 60121-1.[12] A.A. Meharg, J. Harley-Whitaker, Arsenic uptake and metabolism in arsenic resistant and nonresistant plant species. New Phytologist 154 (2002) 29-43. https://doi.org/10.1046/j.1469-8137.2002.00363.x.
This study focuses on considering potential for the application of the blended learning model at high schools in Hanoi City. Surveyed in this study are 550 students and 30 teachers in 3 high schools in Hanoi. The nominal scale and convenience sampling method were used. The results of the study showed that there are advantages and disadvantages of applying the model, such as the good ability to furnish personal technology equipment; the habit of teaching and learning with the support of information technology; inequality in teachers’ knowledge and experience of blended learning; the fact that teachers’ teaching objective is substantially based on traditional teaching. For this reason, some solutions were proposed with a view to efficiently applying the blended learning model, including special importance to the increase of teachers’ and students’ awareness, investment in infrastructure development, application of the blended learning model according to a roadmap, and promulgation of a policy on fostering and encouraging teachers to apply the blended learning model. The results of this study will provide further research ideas about selecting the most appropriate approach to use when designing blended courses at high schools in Hanoi.
This study was conducted to investigate the species composition of Chlorophyta and Charophyta in Bach Ma National Park, Thua Thien Hue province. Here, we identified 45 species and subspecies, belonging to 17 genera, 7 families, and 4 orders. Charophyta was the most diverse phylum, with 75.56% total species. The dominant orders and families are Desmidiales and Desmidiaceae. The most diverse genus belongs to Cosmarium (15), Euastrum (5) and Scenedesmus (5). Micrasterias foliacea Bailey ex Ralfs and Cosmarium pardalis Cohn are tropical algae, while transitional species and temperate species are also present such as Cosmarium pachydermum Lund. var. indicum Iyenf. et Vim Bai and Euastrum jenneri W. Archer, respectively. The dominant group is described as Desmidiales with Chlorococcales (Ch. I) index ranging from 0.087 to 0.19 in Thuy dien Dam and Thuy dien bridge, while there are several species of Sphaeropleales with Ch. I index of 0.67 in Hoang Yen stream.
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