PBL(problem based learning)和翻转课堂(flipped classroom)是当前新兴的两种教学模式。前者主要是以问题为导向,通过小组讨论解决问题;后者则强调将知识传授与内化的顺序完全颠倒,实行课前学习、课上指导。把这两种方法结合使用,可以...PBL(problem based learning)和翻转课堂(flipped classroom)是当前新兴的两种教学模式。前者主要是以问题为导向,通过小组讨论解决问题;后者则强调将知识传授与内化的顺序完全颠倒,实行课前学习、课上指导。把这两种方法结合使用,可以做到取长补短,提高教学效果,最终起到提高学生综合能力的作用。为此,我院在"生物化学技术原理"课程的教学改革过程中,成功地将两种教学模式相结合,强调理论教学与实践活动并重,取得了良好的教学效果。学生在学科竞赛、科研项目、课外科技活动、社会实践以及论文发表等方面屡获佳绩。这些教学改革与实践不仅提高了学生掌控、串联知识的能力,而且提升了其综合素质、强化了在实践创新和团队合作过程中的表达沟通能力。值得强调的是,通过改革也有效地提升了任课教师的业务水平和授课能力。展开更多
Monacrosporium ellipsosporum, a nematode-trapping fungus, was isolated by baiting with sclerotiaof Sclerotinia sclerotiorum in soil from a tobacco field in Yuxi, Yunnan Province. Colonizationfrequency of the sclerotia...Monacrosporium ellipsosporum, a nematode-trapping fungus, was isolated by baiting with sclerotiaof Sclerotinia sclerotiorum in soil from a tobacco field in Yuxi, Yunnan Province. Colonizationfrequency of the sclerotia by the fungus was 18% in natural soil. Reinoculation tests byplacing surface-sterilized sclerotia on fungal cultures for two weeks and then surface-sterilized again led to 32% sclerotia be infected. Dual culture tests in PDA plates did notgive rise to a suppression zone between the colonies of M. ellipsosporum and its counterpartfungi S. sclerotiorum and Rhizoctonia solani, suggesting there was little or no nutritionalcompetition and absent of antifungal compounds. However, M. ellipsosporum could grow overabsent of S. sclerotiorum and R. solani, and significantly inhibited their growth on agarplates. Scanning electron and light microscopic observations showed that hyphae of M. ellipsosporumgrew along and appressed on hypha of S. sclerotiorum and coiled around hyphae of R. solani.Assays of cell wall-degrading enzymes showed that M. ellipsosporum grew well in chitin agarmedia, with clear transparent hydrolysis zones. Activities of total chitinase, exo-chitinase,β-1, 3-glucanase and protease were 140.2±11.9, 82.9±4.1, 111.2±7.6 and 76.1±4.3 U respect-ively, after incubation for 4 days at 30 ℃ in liquid media containing ground sclerotia of S.sclerotiorum as sole nutrient source. These enzymes might be important in the mycoparasiticactivity of M. ellipsosporum.展开更多
“2021年年初我们把成果发表在Science(《科学》)杂志上,目前世界上没有第二个组可以做一样的研究出来。”“我们的研究成果以封面的形式写进了国际最权威的生化教科书Principles of Biochemistry(《生物化学原理》)里。”“我们做的东...“2021年年初我们把成果发表在Science(《科学》)杂志上,目前世界上没有第二个组可以做一样的研究出来。”“我们的研究成果以封面的形式写进了国际最权威的生化教科书Principles of Biochemistry(《生物化学原理》)里。”“我们做的东西比国外的都要好,为什么要出国?”展开更多
"2021年年初把成果发表在《Science》上,目前世界上没有第二个组可以做一样的研究出来.""我们的研究成果以封面的形式写进了国际最权威的生化教科书《生物化学原理》(Principles of Biochemistry)里.""我们做..."2021年年初把成果发表在《Science》上,目前世界上没有第二个组可以做一样的研究出来.""我们的研究成果以封面的形式写进了国际最权威的生化教科书《生物化学原理》(Principles of Biochemistry)里.""我们做的东西比国外都要好,为什么要出国?"展开更多
文摘PBL(problem based learning)和翻转课堂(flipped classroom)是当前新兴的两种教学模式。前者主要是以问题为导向,通过小组讨论解决问题;后者则强调将知识传授与内化的顺序完全颠倒,实行课前学习、课上指导。把这两种方法结合使用,可以做到取长补短,提高教学效果,最终起到提高学生综合能力的作用。为此,我院在"生物化学技术原理"课程的教学改革过程中,成功地将两种教学模式相结合,强调理论教学与实践活动并重,取得了良好的教学效果。学生在学科竞赛、科研项目、课外科技活动、社会实践以及论文发表等方面屡获佳绩。这些教学改革与实践不仅提高了学生掌控、串联知识的能力,而且提升了其综合素质、强化了在实践创新和团队合作过程中的表达沟通能力。值得强调的是,通过改革也有效地提升了任课教师的业务水平和授课能力。
基金supported by the National High-Tech R&D Proqram(863)of China(2001AA246011).
文摘Monacrosporium ellipsosporum, a nematode-trapping fungus, was isolated by baiting with sclerotiaof Sclerotinia sclerotiorum in soil from a tobacco field in Yuxi, Yunnan Province. Colonizationfrequency of the sclerotia by the fungus was 18% in natural soil. Reinoculation tests byplacing surface-sterilized sclerotia on fungal cultures for two weeks and then surface-sterilized again led to 32% sclerotia be infected. Dual culture tests in PDA plates did notgive rise to a suppression zone between the colonies of M. ellipsosporum and its counterpartfungi S. sclerotiorum and Rhizoctonia solani, suggesting there was little or no nutritionalcompetition and absent of antifungal compounds. However, M. ellipsosporum could grow overabsent of S. sclerotiorum and R. solani, and significantly inhibited their growth on agarplates. Scanning electron and light microscopic observations showed that hyphae of M. ellipsosporumgrew along and appressed on hypha of S. sclerotiorum and coiled around hyphae of R. solani.Assays of cell wall-degrading enzymes showed that M. ellipsosporum grew well in chitin agarmedia, with clear transparent hydrolysis zones. Activities of total chitinase, exo-chitinase,β-1, 3-glucanase and protease were 140.2±11.9, 82.9±4.1, 111.2±7.6 and 76.1±4.3 U respect-ively, after incubation for 4 days at 30 ℃ in liquid media containing ground sclerotia of S.sclerotiorum as sole nutrient source. These enzymes might be important in the mycoparasiticactivity of M. ellipsosporum.
