亚硫酸盐还原酶发酵工艺条件初探     

刘大翠 《四川职业技术学院学报》2005,15(4):106-108

本文对硫酸盐还原菌产亚硫酸盐还原酶的发酵工艺条件进行了初步研究,主要内容包括硫酸盐还原菌发酵条件：碳源、氮源、温度、起始pH、装液量及发酵周期等.实验研究表明,以尿素作为氮源,以可溶性淀粉为碳源,C：N比为1：3,在初始pH7.0的条件下,接种量为5%,装液量为1：3（v/v）,35℃摇床培养42h,酶活力可达到16.2U/mL.  相似文献   

Interaction of activity involvement and recreational location selection behavior in Lowland City： A case study of public parks in Saga City, Japan     

IAMTRAKUL Pawinee TEKNOMO Kardi GE Jian HOKAO Kazunori 《浙江大学学报(A卷英文版)》2005,6(8):900-906

INTRODUCTION Public parks are representative of city green ar-eas that provide numerous recreation opportunities to the people in the community. At the same time, public parks offer social, economic, and environmental benefits. High quality park service contributes to urban quality, but requires a large city government budget on personnel, parks resources, and admini-stration to maintain public parks’ high quality of ser-vice. In order to maintain and explain the budget for public parks…  相似文献   

以学习活动为中心的中学信息技术课程教学案例研究   总被引：1，自引：0，他引：1  

林红霞  章伟民 《现代教育技术》2006,16(4):27-30

以学习活动为中心的教学设计模式是教学设计的新发展,在中小学的各门课程教学中得到了普遍应用。信息技术课是一门操作性、实用性很强的课程,开展活动教学尤为重要。该文首先提出开展学习活动的普适的教学设计方案,然后针对一堂中学信息技术课的活动教学进行具体教学设计,最后给出该教学案例实施后的反馈与分析。  相似文献   

论我国反不正当竞争立法的发展完善与现状     

肖力 《承德师专学报》2002,22(4):53-54

本文对国内外不正当竞争立法的状况及历史沿革进行了深入的分析，并在此基础上研究了我国反不正当竞争立法的现状。  相似文献   

Educational transformation: Is it, like ‘beauty’, in the eye of the beholder, or will we know it when we see it?     

Tony Fisher 《Education and Information Technologies》2006,11(3-4):293-303

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苦瓜多糖的制备及其抗氧化性质研究   总被引：3，自引：0，他引：3  

董加宝  李芳 《湖南科技学院学报》2008,29(8)

对苦瓜多糖的提取pH、NaCl浓度、温度、料液比、时间、浸提次数进行了研究。结果表明最佳提取工艺为pH7、50℃、0.8%NaCl、料液比1：5、60min,在最佳工艺条件下苦瓜多糖浸提两次后的提取率达到11.2%。对苦瓜多糖的生物学活性研究表明其具有抗氧化活性,在浓度为15.0g/L时清除H2O2的能力达到100%,其还原能力也显著高于抗坏血酸。  相似文献   

Creating Spaces for Collaboration in Community Co‐design     

Mirian Calvo  Madeleine Sclater 《The International Journal of Art & Design Education》2021,40(1):232-250

Urgent societal challenges have led to unease in our socio‐cultural interactions and the production systems that underpin our lives. To confront such challenges, collaboration stands out as an essential approach in accomplishing joint goals and producing new knowledge. It calls for interdisciplinary methodologies such as co‐design, an approach capable of bridging multiple expertise. The core activities of co‐design are based on the premise of collaboration and on developing creative social environments. Yet achieving collaboration through co‐design is challenging as people need to understand each other, and develop trust and rapport. We argue that ‘informal‐mutual learning’ is central to building mutual understanding. This article explores how we create spaces for collaboration through co‐design by examining the social environments supporting them. It examines the value of collaboration and its impact upon participants within an action research project conducted in Scotland. We identified Cultural‐Historical Activity Theory (CHAT) as a suitable theoretical framework. It offers support for holistic inquiry into participation and learning. Its strength was in the attention that it pays to multi‐dimensional human interactions within the social environment. This led to an understanding of the concepts of boundary‐crossing and boundary space examined through a CHAT lens. The findings shed light on four designerly conditions supporting informal‐mutual learning when engaged in collaboration during co‐design situations: choreography and orchestration, aesthetics, playfulness, and quality and quantity of participation. The findings enable us to elaborate on the theorisation of boundary space, a theoretical space for the assemblage of multiple levels of expertise to achieve collaboration.  相似文献   

试论小学道德与法治教学中活动情境创设     

徐小平 《天津教育》2021,(11):83-84

新时期,道德与法治教师要不断转变自己的教学方式和方法,与时俱进,吸引小学生学习的注意力,激发小学生学习的兴趣,充分调动学生学习的积极性、主动性和创造性,进一步提高小学生学习的效率和质量,不断提高小学生的道德与法治意识。本文首先是通过相关信息的调查了解到,当前小学道德与法治教学的现状,发现了小学道德与法治教学的问题,其次是根据所发现的问题提出相关策略。  相似文献   

战略成本管理初探     

何菲 《黄冈职业技术学院学报》2003,5(2):67-70

本文在分析战略成本管理的内涵和特征的基础上,比较了传统成本管理与战略成本管理;介绍了几种主要的战略成本管理方法;并对我国企业推行战略成本管理提出了一些建议。  相似文献   

校外科技活动的深远意义     

程国阳 《继续教育研究》2003,(1):104-106

本是作在多年指导校外课外电子科技活动的基础上，着重从理论与实践的结合上探讨了中小学现代电子科技活动的发展。阐述了数字电路教学的校外课外开展活动的情况，在电子兴趣活动以及在培养学生成才方面的作用。并就进行活动的重要性、开展原则、实施步骤及其实施效果等方面作了分析研究。  相似文献