基于WWW体育选修课管理系统的设计与实现

本文是基于 www技术 ,设计和实现的体育选课管理信息系统。该系统以浏览器 /服务器 (B/ S)模式实现选修课信息的管理 ,实现了网页访问、系统查询、学生和教师信息的管理、课程管理、选课管理、成绩管理、系统管理、电子公告等功能。     

P（MA -AA）/羽毛多肽复合纳米纤维膜吸附铅离子的性能研究

利用静电纺丝技术,制备P（MA-AA）/羽毛多肽复合纳米纤维膜,研究了铅离子的初始浓度、反应的时间、羽毛多肽的含量对复合纳米纤维膜吸附量的影响。结果表明：铅离子浓度的增加,复合纳米纤维膜吸附量增大且纳米纤维膜吸附铅离子为吸热反应;在60min时基本达到吸附平衡且饱和吸附量为33．46mg/g;未加入羽毛多肽时,纳米纤维膜吸附量为34．5g,羽毛多肽质量分数为10％时,复合纳米纤维膜吸附量最小;羽毛多肽质量分数在10％～20％时,复合纳米纤维膜吸附量逐渐增加,羽毛多肽质量分数超过20％时,无法收集到纳米纤维膜。     

稀土离子Tb~(3+)与芦丁配合物的合成及其分子光谱表征

研究了稀土离子Tb3+与芦丁配合物的合成方法,利用红外光谱及差热分析等对合成的络合物进行了光谱表征,实验结果表明Tb3+与芦丁络合形成了新的配合物.     

利福霉素产生菌906-43菌株的选育

用氮离子束辐照处理利福霉素产生菌地中海诺卡氏菌，再利用利福霉素浓度梯度产板培养，纯化和复筛，得到高产菌株906－43，较出发株产量提高17．5％。     

甲基纤维素修饰电极对H2O2电催化还原的研究

用甲基纤维素(MC)将过氧化氢酶(Cat)固载于热裂解石墨电极表面,制备了Cat-MC膜修饰电极.甲基纤维素膜中的过氧化氢酶与电极直接传递电子.在pH6.0的磷酸盐缓冲溶液中可得到一对可逆的过氧化氢酶辅基血红素Fe(III)/Fe(II)电对氧化还原峰,式电势为-0.331V(vsSCE).其式电势随溶液的pH值增加而负移且成线性关系,直线斜率为-38.0mV/pH,说明过氧化氢酶的电子传递过程伴随有质子的转移.并研究了过氧化氢酶修饰电极对H2O2的电催化性能.在H2O2一定浓度范围(15.6～110.1μmol/L)内,催化电流与H2O2浓度成线性关系.     

碳纳米管修饰电极在酸性溶液中对NO2-的检测

在载有Os(bpy)3 2+的碳纳米管粉末微电极上,第一步及第二步还原平台电势上,NO2-离子检测的灵敏度及温度系数分别为5.7 A·cm-2·mol-1和6.8 A·cm-2·mol-1及0.16%/℃和0.14%/℃.检测限为10-7 μmol/dm3.拥有如此高的灵敏度和很低的温度系数,使这种粉末微电极将是制备高性能亚硝酸根检测器的良好探头.     

Academic identity,confidence and belonging: The role of contextualised admissions and foundation years in higher education

This article presents a cross-national exploration of responses to widening participation (WP), with a specific focus on the provision of foundation year (FY) programmes and the use of contextualised admissions (CA) in selective Irish and UK institutions. There remains a dearth of research on these routes, with little understanding of the characteristics of students who utilise them, of why students use these routes and little knowledge of their effect on students’ experiences in university and their overall sense of belonging. A year-long longitudinal comparative case study design examined three alternative entry routes in two selective higher education institutions (HEIs) in England and Ireland: a well-established FY; a newly formed FY; and a CA pathway. Data were collected through a mixed-method approach. Questionnaires and in-depth focus groups were employed at fixed points with participating students in each route. Results indicated that FY students had lower levels of familial educational history and parental occupation. FY students’ sense of belonging significantly increased over the year, with students reporting increased confidence and sense of belonging due to the relationships established during the FY. CA students’ sense of belonging remained the same, with students reporting feeling different and isolated. Results indicate that while students utilising FYs may be ‘more disadvantaged’ than CA students, their experiences helped establish a sense of belonging; illustrating the need for diverse WP routes catering to a wide range of needs. Results highlight the importance of providing opportunities to develop social and bridging social capital for all non-traditional students.     

多酸基壳聚糖复合材料的制备及吸附脱硫性能研究

以多酸盐和壳聚糖为构筑基元,采用离子凝胶法合成了多酸基壳聚糖复合材料．FT-IR、XRD、TG及SEM等测试结果表明,复合材料中的多酸阴离子仍然保留其基本的骨架结构,多酸与壳聚糖之间存在很强的化学作用,复合物的结晶性大大降低．多酸基壳聚糖复合材料热稳定性较强,具有一定的吸附脱硫性能．     

碳糊电极吸附伏安法测定痕量锑

根据锑与溴邻苯三酚红(BPR)生成的络合物在碳糊电极上的吸附特性, 建立了测定痕量锑的吸附伏安法. 整个分析过程分3个步骤: 吸附富集、还原和溶出. 用单因素变化法得出最佳试验条件为: 以含40 μmol/L BPR的0.10mol/L HCl为富集底液; 富集时间150 s; 还原和溶出介质为0.20mol/L HCl; 还原电位为-0.50V; 还原时间为60 s;扫描范围为-0.5～0.20V. 考察了共存离子的影响. 二次导数溶出峰电流与锑(Ⅲ)浓度在1. 0nmol/L～0. 50μmol/L范围内呈良好的线性关系, 检出限达0.5nmol/L. 该方法已成功应用于人发和水样中锑的测定.     

电位法测定微量铝的研究

建立了在弱酸条件下，用氟离子选择性电极直接电位法测定微量铝的新方法，在pH=5.0时，F^-浓度大于Al^3＋浓度前提下，测定试液的电位值与之中的Al^3＋浓度成线性关系．线性范围与F^-总浓度有关，为0～10μg／ml．