基于Web技术的计算机公共课网络教学平台的构建

根据目前计算机公共课遇到的一些问题,提出了基于Web技术的计算机公共课网络教学平台的构建,通过平台的使用,充分发挥了学生的自主学习的积极性,提高了教师的教学效果。     

Preparation of high-affinity rabbit monoclonal antibodies for ciprofloxacin and development of an indirect competitive ELISA for residues in milk

A convenient competitive enzyme-linked immunosorbent assay (ELISA) for ciprofloxacin (CPFX) was developed by using rabbit monoclonal antibodies (RabMAbs) against a hapten-protein conjugate of CPFX-bovine serum albumin (BSA). The indirect competitive ELISA of CPFX had a concentration at 50% inhibition (IC₅₀) of 1.47 ng/ml and a limit of detection (LOD) of 0.095 ng/ml. The mAb exhibited some cross-reactivity, however, not so high with enrofloxacin (28.8%), ofloxacin (13.1%), norfloxacin (11.0%), fleroxacin (22.6%), and pefloxacin (20.4%). And it showed almost no cross-reactivity with other antibiotics or sulfonamides evaluated in this study. The competitive ELISA kit developed here could be used as a screening tool to detect and control illegal addition of CPFX in food products. This kit had been applied to milk detection and the recovery rates from samples spiked by CPFX were in a range of 63.02%–84.60%, with coefficients of variation of less than 12.2%.     

活动理论视域下远程学习目标结构之建构冰

当前远程学习的课程设计普遍存在目标设计缺失的现象,这可能源于人们对远程学习目标“是何”及“如何”运作的认识不够,从而导致学习者面临学习失败的风险。探讨远程学习目标“是何”是研究“如何”的先决条件。远程学习目标结构研究,旨在探讨远程学习目标的类别及其关系。活动理论是一种重在把活动系统作为分析单位的分析模式,迄今为止经历了“中介说”、“层次说”、“要素说”三代发展历程,为人们重新认识远程学习的目标结构提供了新的视角。它提示人们可以从活动层中的“过程”与“结果”维度去认识远程学习的目标结构,并从行动层中提取描述远程学习过程目标的5个要素：主体、客体、工具、行为、时间,建构出远程学习“过程一结果”目标结构的分析框架。远程学习目标结构可以帮助学习者在学习之初对远程学习结果及实现结果的过程做出规划,为之后的目标实施及评价提供保障,规避学习失败的风险。     

NaCl胁迫紫色辣椒新品系YN99007的发芽试验生理研究

紫色辣椒新品系(YN99007)在5种不同NaCl浓度(0.0%、0.5%、1.0%、1.5%、2.0%)处理下进行发芽试验(以日本天鹰椒作为对照),研究各浓度下的发芽率、发芽势、发芽指数、过氧化氢酶(catalase,CAT)活性及根系活力等指标.结果表明:NaCl浓度范围为1.0%～1.5%时,紫色辣椒YN99007的发芽率、发芽势和发芽指数高于对照品种;而其芽中的过氧化氢酶活性及根系活力均低于对照品种,但高盐浓度下YN99007的两个指标值下降缓慢.     

论网络教育精品课程建设的若干关键问题

当前网络教育精品课程建设的关键问题有:课程教师难以全身心投入网络教学;网络课件不符合学生自主学习需要;网络教学缺乏过程性;学习支持服务不规范。针对上述问题提出了以下对策措施:建立一支专兼结合、分工明确的教师队伍;设计适合学生自主学习的网络课件;积极开展网络教学活动;通过制度建设改进学习支持服务的规范性;积极争取学校的政策支持。     

50Hz正弦磁场对细胞超氧产率及细胞增殖的影响

中国仓鼠肺成纤维细胞（CHL）和人脐静脉内皮细胞（HUVEC）受磁场辐照后,采用荧光光度法检测细胞的超氧产率和采用噻唑蓝比色分析法检测细胞的增殖情况。50Hz、0．4mT正弦磁场辐照30min引起CHL细胞和HUVEC细胞的超氧产率分别较对照组增加12％和19％：该磁场辐照24h导致CHL细胞和HUVEC细胞的数目分别较对照组上调9％和10％。提示50Hz、0.4mT正弦磁场促进CHL细胞和HUVEC细胞的增殖,可能与超氧自由基产率的上调有关。     

试析综合实践活动课程的变革与出路

综合实践活动课程是基础教育课程改革中的亮点,它是一场发生在教育领域的静悄悄的革命。它以学生学习和社会生活密切相关的问题为内容,倡导自主、合作、探索的学习方式以及平等理解的师生关系。实施过程中,由于许多教师对课程理念仍理解不深,活动开展停留于表面,因此须进一步强化课程意识,走常态化、规范化、校本化的发展之路。     

The affordances of teacher professional learning communities: A case study of a Chinese secondary school

This study investigates the learning experiences and the trajectories of EFL teachers' professional development in Chinese secondary schools under a socio-cultural framework. The findings indicate that social and individual affordances are both essential to individual teachers’ professional development, and to the sustainable growth of the teacher learning community (TLC). The former is prerequisite to the latter, whereas the latter determines the route and pace of development. This paper also demonstrates the usefulness of activity theory in analysing the affordances of TLC, and advocates that all parties involved should understand, identify and create positive affordances for teacher professional development.     

The relations among child negative interactive behavior,child temperament,and maternal behavior

Negative behavior toward the mother during toddlerhood might be a marker of increased risk for maladjustment. The aim of the present study was to examine the possible antecedents of toddler boys’ negative behavior observed in interaction with the mother: child temperament, and maternal behavior toward the child. We studied the moderating and mediating role of two dimensions of maternal behavior, sensitivity and intrusiveness, in the relationship between children's temperamental traits (frustration, soothability and activity level), on the one hand, and child negative behavior, on the other hand. The sample consisted of 112 mother–son dyads observed when the child was 17 months old. A temperament questionnaire was completed by the mothers. Child negative interactive behavior, maternal sensitivity and intrusiveness were observed at home during a 13-min play session. Maternal sensitivity was negatively related to child negative interactive behavior regardless of child temperament. Maternal intrusiveness, however, moderated the relation between activity level and negative behavior, i.e., children with high activity level showed higher levels of negative behavior especially when the mother was highly intrusive. Furthermore, maternal intrusiveness acted as a mediator in the relation between soothability and negative behavior, i.e., low soothability was linked to higher maternal intrusiveness, which in turn was associated with higher negative behavior.     

在活动中加强学生的思想教育

学生的教育包括德智体美劳各个方面,其中德育占据了首要地位,一个人的思想问题是首要问题。国家的教育政策,把培养人的问题摆在首位,社会主义的教育方针,根本问题是为谁培养人,培养什么样的人。一个国家的文明程度,在一定程度上取决于这个国家公民的思想觉悟程度以及文化修养水平。因此,要提高学生的思想道德修养,培养他们成为一个有文明、有礼貌的社会主义接班人。具体的教学实践过程当中,先培养学生如何去做人,然后培养他们学习科学文化知识,让他们能够全面发展。学生的思想认识提高了,他们的言谈举止、行为习惯就合乎校规校纪,内在的心灵之美也就体现出来了。