The Blended Teaching Style of Scientific Inquiry and Interactive Teaching Using in Instrumental Analysis Courses

为了提高西部地区少数民族大学仪器分析课程的教学质量,在教学过程中采用两种教学模式:A班采用传统式讲授:教师讲学生听;B班采用探究与互动式相融合的教学模式。通过一个学期的教学实践与比较,发现探究与互动式相融合的教学效果比传统讲授的教学效果要优越。 In order to improve the learning and teaching quality and level of instrumental analysis courses in west area, two different teaching styles were carried out in A and B two classes, separately. One style is in the traditional teacher--centered manner of lecture, the students passively listen to their teachers＇ lecture and take notes;another format is to be guided by scientific inquiry teaching,and in eombination （blend） of interactive learning and teaching. The study finds that the blended learning and teaching style of inquiry and interactive is a better way to teach than the traditional one through a semester experiment and com- parison.广西壮族自治区教育厅教研教改基金资助项目“《分析化学》精品课程建设项目”(桂教高教[2008]133号),“分析化学精品课程建设与配套教学资源的开发研究”(桂教高教[2008]151号);广西民族大学引进人才科研启动项目(2009QD024)资

A Blended Teaching Style of Scientific Inquiry and Interactive Teaching in Application of Competition Training of the College Chemical Experiment Skills

为进一步提高实验教学质量,培养学生的创新精神、实验、实践动手能力及综合素质,本文在大学分析化学实验竞赛操作培训中构建了探究互动模式。以化学实验竞赛为动力,引领进一步深化教学改革。提出了在探究实验中互动,在互动中进行探究的教学方法,从而培养了学生的实验操作技能、创造性及创新性。In order to improve the learning and teaching quality of experiment course and cultivate students ＇innovative spirit,and experiment skills,and practical ability and comprehensive quality,a blended teaching style of scientific inquiry and interactive teaching was constructed during the college analytical chemical experiment skill training.The further teaching reform was developed using chemical experiment competition as a driving force. A new teaching method of scientific inquiry during interactive teaching and interactive teaching during scientific inquiry was put forward.Therefore,the students＇ experimental skills,creativity and innovation were improved.广西高等教育教学改革工程项目(2014JGA129);广西民族大学2103年度高等教育教学改革工程项目(2012XJGY23

Practice of the Blended Styles of Constructivism and Scientific Inquiry Teaching in Instrumental Analysis Course

为了提高《仪器分析》课程教学质量与水平，本工作在化学及应用化学两个班的教学过程中运用两种教学方法：一种是单一的讲授方法；另一种是以建构主义理论为指导，并融合探究模式，这种教学活动过程包括：课前布置任务，课堂创设问题情景，引导学生探究问题，并提出猜想或假设，对假设进行检验及演绎推理，引导学生发现规律得出结论。通过一学期的实践与比较，发现建构主义与探究式相融合的教学效果比传统讲授的教学效果要优越。n order to improve the learning and teaching quality and level of Instrumental Analysis courses, two different teaching styles were carried out in two classes of chemistry major and applied chemistry major （counterparts）, respectively.One style was to utilize traditional teacher-centered manner of lecture, the students passively listened to their teachers＆#39;lecture and take notes; another format was to be guided by constructivism, and to blend inquiry learning and teaching.This blended learning and teaching style included the following processes： subsequently, to assign homework to students before class, to design problem environments, to pilot students to inquire problem on their own, and to propose their guess or hypothesis, to test their hypothesis and conduct deductive reasoning, to motivate students to find law and finally make conclusion in classroom.The investigations found that the blended learning and teaching style of constructivism and inquiry was superior to the traditional one through a semester experiment.广西高等教育教学改革工程项目(2014GA129);广西民族大学2103年度高等教育教学改革工程项目(2012XJGY23

Exploration and Practice in Instrumental Analysis Courses for Chemical Engineering Major

教学质量是教师的生命线和永恒的追求,最优的教学效果是教师永久的目标.为了提高化工专业仪器分析课程教学质量与水平,该文对该专业教学中存在的问题进行了分析,在教学方法、教学内容、教学手段等方面进行了探索和改革,从而激发了学生的学习兴趣,有效地提高了教学质量及效果.The teaching quality is our lifeline and lasting pursue of our teacher. The optimal teaching performance is our permanent target. To improve the teaching quality and level of instrumental analysis courses for chemical engineering major, the paper analyzed some problems appearing in instrumental analysis teaching course of chemical engineering major. The characteristics of instrumental analysis teaching and chemical engineering major were bonded together, and teaching method and content and measure were ex- plored and reformed in the course of teaching. The results show that these adopted measures can inspire the students＇ interest, and improve the teaching quality and efficiency effectively.广西壮族自治区教育厅教研教改基金资助项目(桂教高教[2008]151号,桂教高教[2008]133号);广西民族大学2011年度高等教育教学改革工程立项项目(2011XJGD25

Applications of Scientific Inquiry Teaching in Instrumental Analysis Courses

为了提高《仪器分析》课程教学质量，该研究在环境工程与制药工程专业的《仪器分析》课程中分别采用了两种教学模式：一种是“填鸭式”的教学，老师讲学生听；另一种是探究式，引导学生对一些知识点进行探索．后者这种教学活动过程包括：设问质疑，做出猜测或假设、交流，得出初步结论．通过一学期的实践与比较，发现探究式的教学效果比传统讲授的教学效果要优越．In order to improve the learning and teaching quality of instrumental analysis courses, two different teaching styles were carried out in two classes of environmental engineering specialty （counterparts） and pharmacy engineering specialty, respectively. One style is to cramming method of teaching： students passively accept their teachers＇ lecture and take notes; another format is a scientific inquiry teaching： to guide the students to explore knowledge point. This teaching style includes the following processes： subse- quently, to assign homework to students before class, to design problem environments, to pilot students to inquire problem on their own, and to propose their guess or hypothesis, to test their hypothesis and conduct deductive reasoning, to motivate students to find law and finally make conclusion in classroom. The investi- gations found that the scientific inquiry teaching was superior to the traditional one through a semester exper- iment.广西高等教育教学改革工程项目(2014GA129);广西民族大学2103年度高等教育教学改革工程项目(2012XJGY23

建构、探究及互动混合模式在教学中的实践——以大学仪器分析课堂为例

课程教学模式的改革对于培养创新能力的人才具有重要作用。为了提高化工专业仪器分析课程教学质量,在教学过程中可运用两种教学模式:一种是传统的讲授,老师讲学生听;另一种是以建构主义理论为指导,并融合探究及互动模式,这种教学活动过程包括:课前布置任务,课堂创设问题情景,引导学生自主探究问题,并提出猜想或假设,对假设进行检验及演绎推理,引导学生发现规律得出结论。通过一学期的实践与比较,发现建构主义指导下的探究及互动混合灵活多变模式的教学效果比传统单一讲授的教学效果要优越。2014年广西高等教育教学改革工程项目(No.2014JGA129);广西民族大学2012年度高等教育教学改革工程项目(No.2012XJGY23)支

Preparation and electrochemical characteristics of trivalent chromium-zirconium hybrid coatings on 6063 aluminum alloy

引言传统上使用六价铬转化膜来提高铝及其他金如锌及钢铁的防腐蚀性能[1-2]。然而,六价铬有毒,在电器及电子工业中,欧盟RoHS法规禁止使用六价铬化合物[广西产业重大科技攻关工程(1114003-2);广西民族大学引进人才科研启动基金(2009QD024

Preparation and Application of Phenobarbital Electrochemical Sensor Based on

以马来松香丙烯酸乙二醇酯(EGMRA)为交联剂,甲基丙烯酸为功能单体,在玻碳电极表面电聚合了一种对苯巴比妥分子具有专一性识别的聚合膜。在最佳实验条件下,采用循环伏安法(CV)、差分脉冲伏安法(DPV)及电化学交流阻抗法(EIS)对印迹传感器的性能进行研究。实验结果表明:该印迹传感器对苯巴比妥具有快速响应、专一性识别和高灵敏度的特点,且苯巴比妥的浓度在8.0×10-7~1.0×10-4mol/L范围内与DPV电流信号呈良好的线性关系,相关系数(r)为0.998 3。检出限(S/N=3)为5.4×10-8mol/L。将此印迹传感器应用于实际样品中苯巴比妥的检测,加标回收率为95.7%~105.0%。Abstract: A specific molecularly imprinted polymer(MIP) film for the determination of phenobarbital (PB) was electropolymerized on a glassy carbon electrode using methacrylic acid as functional monomer and ethylene glycol maleic rosinate acrylate(EGMＲA) as cross-linking agent． The optimum experimental conditions were explored． Under the optimum experimental conditions，the response performances of the sensor for phenobarbital recognition were investigated by cyclic voltammetry(CV)， differential pulse voltammetry(DPV) and electrochemical impedance spectroscopy(EIS)． The results showed that the molecularly imprinted film exhibits a quick response，good sensitivity and selectivity to the template molecule phenobarbital． A good linear relationship between DPV current signals and phenobarbital concentration in the range of 8. 0 × 10 － 7 － 1. 0 × 10 － 4 mol /L was obtained，with a correlation coefficient( r) of 0. 998 3 and a detection limit( S /N = 3) of 5. 4 × 10 － 8 mol /L． The prepared sensor was successfully applied in the determination of phenobarbital in practical samples with recoveries of 95. 7% － 105. 0%．广西自然科学重点基金(2013GXNSFDA019006);广西教育厅科研项目(2013YB068);广西研究生教育创新计划资助项目(YCSZ2014120);广西民族大学重点科研项目(2012MDZD040

Corrosion inhibitor of the different consiting phosphate pigments

以铬酸锌为参照物,考察了45#钢在不同pH值3.5%NaCl的磷酸盐颜料提取液腐蚀体系下的电化学行为,讨论了传统和新型复合掺杂磷酸盐颜料的腐蚀抑制特性。结果表明,AlZnPO4MoO4.4H2O和AlZn2P3O10-(MoO4)2.2H2O两种新型复合掺杂磷酸盐颜料在不同酸碱度条件下均展现出较为理想的效果,尤其是很好的改善了传统磷酸盐在中性体系中的防腐性能,甚至超过了性能优异的铬酸锌颜料,同时,进一步提升了酸性环境下磷酸盐颜料所具有的优越性。The behaviors of 45# carbon steel in different pH values of pigment-doped water extracts with 3.5% NaCl were observed by a reference of zinc chromate.The corrosion inhibitions of the traditional and two new co-doped phosphate pigments were also discussed.The results show that： perfect results were indicated with the two co-doped phosphate of both AlZnPO4MoO4·4H2O and AlZn2P3O10（MoO4）2·2H2O in different pH values.Especially good for improving the traditional phosphate in neutral system of corrosion resistance,even more than the excellent performance of zinc chrome.At the same time,superiorities were further enhanced in the acidic environments of phosphate pigment.家自然科学基金项目(20566003);广西民族大学重大项目(2008ZD012);广西科学研究与技术开发计划应用基础研究专项项目(桂科基0991005

Preparation and Ｒecognition Properties of CuO Nanoparticles

为了提高苯巴比妥分子印迹传感器的灵敏度,以甲基丙烯酸为功能单体,马来松香丙烯酸乙二醇酯为交联剂,热聚合了一种纳米氧化铜掺杂的苯巴比妥分子印迹传感器。分别采用循环伏安法(CV)、电化学交流阻抗法(EIS)、差分脉冲伏安法(DPV)、计时电流法(CA)对这种印迹传感器的电化学性能进行了研究。分别采用红外光谱、扫描电镜对此印迹传感器的结构及形貌进行了表征。结果表明,以铁氰化钾为分子探针的间接检测中,铁氰化钾的峰电流值与苯巴比妥的浓度在1.2×107~1.5×104mol/L范围内呈现良好的线性关系(线性相关系数R=0.9984),检出限(S/N=3)为8.2×109mol/L。将此印迹传感器用于实际应用,回收率在96.5%~103.0%之间。Abstract To improve the sensitivity，a CuO nanoparticle doped in molecularly imprinted polymer ( MIP) film for the determination of phenobarbital was prepared by using methacrylic acid as functional monomers， ethylene glycol maleic rosinate acrylate as a cross linking agent by thermal polymerization method． The electrochemical properties of the nano-doped sensor were investigated using cyclic voltammetry ( CV) ， differential pulse voltammetry ( DPV ) ， electrochemical impedance spectroscopy ( EIS ) and chronoamperometry ( CA) ． The chemical structures and morphologies of the imprinted films were characterized using Fourier transform infrared spectroscopy and scanning electron microscopy． The results indicated that the sensors response value of peak current showed a linear dependence on the phenobarbital concentration in the ranges of 1．2×10 7－1．5×10 4 mol /L of phenobarbital． ( Linear regression coefficient = 0．9984) with the detection limit ( S /N = 3) of 8． 2 × 10 9 mmol /L． The prepared sensor was successfully applied to the determination of phenobarbital in practical samples with recovery ranging from 96．5% to 103．0%．国家自然科学基金(No.21365004);广西自然科学重点基金(2013GXNSFDA019006);广西高等学校高水平创新团队及卓越学者资助计划(No.桂教人[2014]7号);广西研究生教育创新计划资助项目(YCSZ2014120)资