27 research outputs found

    高等教育国际化背景下跨学科教育的优势和改进措施

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    文章分析了在当今教育国际化大背景下跨学科教育的优势,及我国和发达国家在跨学科教育领域中的教育体系和教育理念方面的差异,并提出改进措施,以期在跨学科高等教育中采用先进、高效的教学方法,提高学生综合素质,培养优秀的跨学科高素质人才。厦门大学“翻转课堂”教学改革研究项目(项目编号:JG20170403)示范性网络课程建设项目“生物化工、微生物学实验、食品安全与健康饮食、出国留学指导

    Discussion on the Organization Management of University Classroom Based on WeChat Platform

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    随着互联网在中国的迅速发展,微信已经成为人们联系的纽带。不仅如此,随着教育信息化的普及,微信在大学教育领域也发挥着越来越重要的创新作用。文章以传统大学课堂为对象,探讨基于微信平台的大学课堂组织管理,例如采用微信公众平台点名系统、上传头像至微信公众平台、进行课堂主题投票、发布学习资料等,并进一步分析基于微信公众平台的大学课堂存在的缺陷及其解决方法。With the rapid development of the Internet in China, WeChat has become a link among people. In addition, with the popularization of educational information, WeChat is also playing an increasingly important innovation role in universities' education area. Taking the traditional university classroom as an object, this paper discusses the organization management of university classroom based on the WeChat platform, such as applying the call system on WeChat public platform, uploading avatar to WeChat public platform, voting class theme, delivering online learning resources and so on. At last, it further analyzes the drawbacks and its solutions existed in the WeChat public platform in this paper.厦门大学示范性网络课程建设项目“生物化工、微生物学实验、食品安全与健康饮食、出国留学指导”

    微生物修复农药污染的研究进展

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    微生物降解是农药污染生物修复的重要手段之一。介绍了微生物降解农药的相关机制、7大类农药微生物降解的研究进展以及微生物降解农药的应用性研究情况。厦门大学引进人才科研启动费项目;; 厦门大学近海海洋环境科学国家重点实验室开放基金;; 国家海洋局第三研究所海洋生物遗传资源重点实验室开放研究基金(0000-X071C3,MEL0603,HY200601)资助;; 福建省科技厅青年人才项目(2007F3094

    常见海洋细菌对纳米二氧化钛的响应

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    选择6种常见海洋细菌,包括非光合细菌海杆菌(Marinobacter sp.)、盐单胞菌(Halomonas sp.)、交替单胞菌(Alteromonas sp.)、副溶血弧菌(Vibrio parahaemolyticus)以及光合细菌聚球藻(Synechococcus sp.)XM-24和299,并以模式菌大肠杆菌(Escherichia coli)和枯草芽胞杆菌(Bacillus subtilis)作为参照,通过测定生长曲线和生物量来表征纳米TiO2(0.1,1,10,100mg/L)对其生长的影响,并通过测定叶绿素a含量来指示聚球藻的光合能力.结果显示:在低质量浓度下(0.1和1mg/L)纳米TiO2对所试细菌的生长影响不显著(p>0.05),而在高质量浓度下(10和100mg/L)纳米TiO2则会显著抑制其生长(p<0.01),并且浓度越大抑制效果越明显;100mg/L纳米TiO2对聚球藻299的叶绿素a合成也有抑制作用;纳米TiO2对非光合细菌生长的抑制作用一般在18h后显著显现(p<0.05),而对2种聚球藻生物量的影响则在6d之后较为显著(p<0.05).研究结果将为进一步评估纳米TiO2对海洋生态环境安全造成的影响提供参考.厦门南方海洋研究中心项目(14CZP034HJ08);;国家海洋局海洋生物遗传资源重点实验室开放研究基金(HY201505

    Removal of free fatty acids from acid oil by esterification with cation exchange resin

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    采用阳离子交换树脂为催化剂研究了酸性油脂的酯化脱酸工艺。分别筛选了001x4,001x7,d113,Hd-8,Cd-552等几种型号的树脂,其中以Cd-552催化效果最好。研究了反应时间、醇酸摩尔比和酸性油脂中催化剂质量分数对Cd-552催化酯化脱酸效果的影响。在醇酸摩尔比30∶1,反应温度60℃,树脂质量分数5%和反应时间5 H的工艺条件下,酸性油脂经Cd-552催化酯化脱酸后,酸值从10.97 Mg/g降低到0.689 Mg/g。反应后树脂易分离,能够循环使用,有效地解决了传统的脱酸催化剂不足,对以酸性油脂为原料的生物柴油的生产具有应用前景。Using acidic cation exchange resins as a solid esterification catalyst,the removal of free fatty acids(FFA) from acid oil by esterification with methanol was researched.The resins such as 001×4,001×7,D113,HD-8,CD-552 were selected for the experiments.The results show that the resin CD-552 is the best catalyst for FFA reduction.The effects of reaction time,mole ratio of alcohol to FFA and mass fraction of catalyst in acid oil on acid reduction by esterification with CD-552 were investigated.Under the reaction conditions: molar ratio of alcohol to FFA 30 ∶1,reaction temperature 60 ℃,catalyst mass fraction 5% and reaction time 5 h,the acid number of the oil is reduced from 10.97 mg/g to 0.689 mg/g after removal of free fatty acids from acid oil by esterification with CD-552.It indicates that the resin is easy to be separated and recycled,which overcomes the deficiency of traditional FFA reduction catalyst,and has a good application prospects for producing biodiesel by using acid oil as raw material

    Design of Teaching Activities in Universities based on Network Platform and Information Technology

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    随着计算机、手机和平板电脑的迅速发展,网络平台的运用和涉及的范围越来越广泛,信息技术应用于现代教学中是-种必然的趋势.文章讨论网络平台和信息技术在现代教学中的运用,以“慕课”和课堂教学混合模式为例,展开讨论网络平台和信息技术在国内高校课堂教育中发挥的作用,对比慕课在线课程和传统课堂优劣,探究如何有效运用慕课在线学习平台和信息技术进行教学活动设计,开展混合教学,提高课堂教学质量.With the rapid development of computer, mobile phone and tablet PCs, the use and the cov-erage scope of network platform are becoming more and more widely. It becomes an inevitable trend to apply the computer information technology into the modem teaching. This paper discusses the application of network platform and information technology in teaching and takes the blended mode of MOOC (Massive Open Online Course) and traditional teaching as an example to discuss the role of the network platform and information technology played in the classroom education of domestic universities. Comparing the advantages and disadvan-tages of MOOC online courses and traditional classroom teaching, we explore how to use the MOOC online learning platform and information technology effectively to design teaching activities and carry out blended teaching to improve the quality of classroom teaching.厦门大学示范性网络课程建设项目“生物化工、微生物学实验、食品安全与健康饮食、出国留学指导”

    生物工程专业英语教学改革的实践与思考

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    生物工程专业英语作为专业课程与大学英语教学的一个重要组成部分,为培养既具生物工程学科专业知识,又具备听、说、读、写等全面发展的复合型人才起着重要的作用。文章结合笔者在教学改革实践过程中得到的一些体会,针对当前高校生物工程专业英语的教学现状,阐述了生物工程专业英语教学难点与重点,指出当今专业英语教学所存在的问题,并对其解决方案——\"翻转课堂\"\"任务式\"与\"参与式\"教学等进行了深入思考。厦门大学示范性网络课程建设项目“生物化工、微生物学实验、食品安全与健康饮食、出国留学指导

    功能化石墨烯对海洋环境细菌群落结构及生长的影响

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    功能化石墨烯因其优异的导电、传热和机械性能,应用前景广阔。为了解功能化石墨烯对海洋环境可能的生态毒性效应,将功能化石墨烯分别加入近岸海水(终质量浓度50 mg/L)和沉积物(终质量分数50 mg/kg)中,通过模拟海洋环境对样品培养2周,并采用DNA高通量测序技术分析功能化石墨烯对海洋细菌群落结构的影响。结果表明功能化石墨烯对两种海洋环境来源的细菌物种组成均有明显影响,但影响效果不同:暴露于功能化石墨烯后,海水中细菌的物种多样性和丰度降低,而沉积物中细菌的物种多样性和丰度升高,这可能是功能化石墨烯在海水和海洋沉积物中分散、吸附和团聚等环境行为存在差异所致。然而,无论在哪种环境来源的处理组中,功能化石墨烯的存在均对光合细菌的生长起促进作用。上述结果可为功能化石墨烯的海洋生态安全性评估提供参考。厦门市海洋经济创新发展示范项目(16PZP001SF16);;\n国家微生物资源平台项目(NIMR-2019-9);;\n国家海洋局海洋生物遗传资源重点实验室开放研究基金(HY201505

    微波辅助萃取-大孔树脂分离纯化芳樟叶黄酮

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    为了综合利用芳樟叶精油提取过程中产生的大量残渣,该文利用微波辅助萃取和大孔树脂选择性吸附来分离纯化芳樟叶黄酮。采用L9(34)正交试验,考察了萃取剂、微波辐射功率、辐射时间及料液比对黄酮得率的影响,确定了微波辅助萃取的优化工艺条件:以60%乙醇做萃取剂,微波功率320W,间歇辐射2次,每次1min,料液质量体积比1:12,在此条件下,芳樟叶黄酮的提取得率为2.97%,与乙醇热回流提取方法相比,得率提高了6.83%,时间缩短了98.89%;为进一步纯化萃取所得的黄酮提取物,选择6种大孔吸附树脂,测定芳樟叶黄酮在树脂上的吸附量和解吸率,筛选出了吸附剂HPD-450,其对芳樟叶黄酮有较好的静态吸附和解吸效果。经装填有大孔树脂HPD-450的固定床纯化后黄酮纯度由22.49%提高到51.28%,纯化倍数2.3倍

    The Research Survey of the Degrading-bacteria and Degrading-enzyme of Synthetic Pyrethroid Insecticides

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    通讯作者:Tel: 0592-2186195; : [email protected][中文文摘]拟除虫菊酯类农药目前已成为我国出口的蔬菜、水果中主要的3类农药残留之一,引起急慢性中毒事件也越来越多,对人类、水生生物和自然环境造成很大危险。而农药生物降解作为去除农药污染的有效手段,逐渐成为环境科学研究的热点。重点综述了拟除虫菊酯类农药降解菌的分离、降解酶的提取、纯化、降解机理、固定化研究,并对以后要解决的问题进行了展望。[英文文摘]Synthetic pyrethroid insecticides have become one of the three major kinds of pesticide residues in the exported vegetabes and fruits in China nowadays. They also caused more and more acute or chronic poisoning affair and do great damage to human beings, aquatic biology and natural environment. As an efficient way to remove pesticides pollution, the biodegradation of pesticides has gradually become the hot issue in the field of environmental sciences. The study on the separation of degrading-bacteria and the extraction, purification, mechanism and immobilization of the degrading-enzyme of pyrethroids is reviewed in this paper. And the problems under resolved in the future work are also prospected.福建省青年科技人才创新项目(No.2007F3094);厦门大学引进人才科研启动费项目(No.0000-X071C3);厦门大学近海海洋环境科学国家重点实验室开放基金(No.MEL0603);国家海洋局近岸海域生态环境重点实验室开放基金(No.200702);国家海洋局第三海洋研究所海洋生物遗传资源重点实验室开放研究基金(No.HY200601
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