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低成本物品在农村初中学物理教学中的应用
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作者 刘维志 《数理化解题研究》 2019年第20期67-68,共2页
物理学是一门以实验为基础的科学,利用低成本随手可得的物品进行物理教学活动,是让学生在“玩中学,做中玩”有利于提高学生对学习物理的主动性与学习兴趣,还让学生感受到科学的真实性拉近物理学与生活的距离.另一方面,由于这些物品本来... 物理学是一门以实验为基础的科学,利用低成本随手可得的物品进行物理教学活动,是让学生在“玩中学,做中玩”有利于提高学生对学习物理的主动性与学习兴趣,还让学生感受到科学的真实性拉近物理学与生活的距离.另一方面,由于这些物品本来的用途并不是用于物理教学,所以这种做法就是一种活用、创新.下面是笔者用低成本物品,提高教学效果的几点尝试. 展开更多
关键词 低成本物品 物理 教学应用
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Response of Two Sweet Potato (Ipomoea batatas L. Lam) Varieties Regenerated on Low Cost Tissue Culture Medium
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《Journal of Agricultural Science and Technology(B)》 2012年第5期534-539,共6页
Plant tissue culture continues to be of great interest within the realms of molecular biology, plant breeding and plant health However, different plant cultivars have different culture efficiencies to tissue culture. ... Plant tissue culture continues to be of great interest within the realms of molecular biology, plant breeding and plant health However, different plant cultivars have different culture efficiencies to tissue culture. In this research, the response of two Kenyan sweet potato varieties, KEMB 36 and Tainurey, cultured on a low cost tissue culture medium was evaluated. The low cost medium contained plant nutrients that were obtained from locally available fertilizers. Each conventional Murashige and Skoog (MS) macronutrient was individually substituted with a locally available fertilizer. The conventional source of micronutrients was substituted with Stanes~ Iodized Microfood while sucrose was obtained from table sugar. Performance of the two cultivars was monitored over a period of six weeks. KEMB 36 had a better performance than Tainurey with an average of eight nodes, seven leaves, three roots and height of four centimeters per plantlet indicating genotype-dependent response. 展开更多
关键词 Culture efficiency sweet potato tissue culture low cost medium genotype-dependent.
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