基于公费定向师范生初等化学教学改革浅析
作者:
欧亚平;许志锋;刘梦琴;毛芳芳;崔莺;...
期刊:
广州化工 ,2017年45(6):200-201 ISSN:1001-9677
作者机构:
衡阳师范学院化学与材料科学学院,湖南 衡阳,421008
关键词:
初等化学;人才培养;教学方法
摘要:
我校初等教育学院设置了数学、物理、计算机及化学等理科专业和其他文科专业,开始招收公费定向师范生,主要目的是为地方乡镇中学培养中学专任教师。学院在人才培养,学生管理及教师队伍建设方面取得了很大成就。本人作为该学院的初等化学教师,结合自身实践,从教材的选定,教学设施的完善,教师队伍的建设及教师教学方法的形成等方面,对初等化学教学方法进行了探索与思考,为公费定向师范生的化学教学提供了改革思路及建议。
语种:
中文
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基于碳量子点荧光猝灭-恢复法测定L-半胱氨酸
作者:
刘梦琴;许志锋;李俊华;刘剑;张红帅;...
期刊:
衡阳师范学院学报 ,2017年38(06):57-61 ISSN:1673-0313
作者机构:
衡阳师范学院化学与材料科学学院,湖南 衡阳 421008;功能金属有机材料湖南省重点实验室,湖南 衡阳 421008;衡阳师范学院化学与材料科学学院,湖南 衡阳,421008;[刘梦琴; 刘剑; 李俊华; 许志锋; 王焕翔; 张红帅] 衡阳师范学院
关键词:
乙二醇;碳量子点;荧光猝灭-恢复;L-半胱氨酸
摘要:
在碱性条件下,以乙二醇为前躯体,通过一步电解法合成了水溶性好、稳定性高且表面富含大量羟基、羧基等水溶性官能团的深棕色荧光纳米材料碳量子点(C-dots)。在Hg2+存在下,可以有效地猝灭碳量子点荧光;而当有L-半胱氨酸存在时,碳量子点的荧光恢复。基于此原理,利用碳量子点荧光猝灭-恢复技术,建立了测定L-半胱氨酸新方法。该方法具有良好的选择性,灵敏度高、操作简单。考察了缓冲溶液pH及Hg2+浓度等试验条件对其测定影响。结果表明,在pH5.0的磷酸盐缓冲溶液,Hg2+的浓度为5μmol/L条件下,L-半胱氨酸的浓度在6.480μmol/L的范围内与碳量子点的荧光恢复程度呈现出良好的线性关系,相关系数为0.998 2,检出限为2.3μmol/L。
语种:
中文
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Ag/N-doped reduced graphene oxide incorporated with molecularly imprinted polymer: An advanced electrochemical sensing platform for salbutamol determination
作者:
Li, Junhua;Xu, Zhifeng;Liu, Mengqin;Deng, Peihong;Tang, Siping;...
期刊:
Biosensors and Bioelectronics ,2017年90:210-216 ISSN:0956-5663
通讯作者:
He, Lingzhi;Qian, Dong
作者机构:
[Tang, Siping; Liu, Mengqin; Deng, Peihong; Xu, Zhifeng; Li, Junhua; He, Lingzhi] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Feng, Haibo; Li, Junhua; Jiang, Jianbo; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.;[He, Lingzhi] Hunan Polytech Environm & Biol, Sch Med, Hengyang 421008, Peoples R China.
通讯机构:
[He, Lingzhi] H;[Qian, Dong] C;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
关键词:
*Ag/N-doped reduced graphene oxide;*Electrochemical sensor;*Molecularly imprinted polymer;*Salbutamol
摘要:
In this work, the metallic silver and non-metallic nitrogen co-doped reduced graphene oxide (Ag-N-RGO) was first synthesized by a simple and cost-effective strategy, and then a molecularly imprinted polymer (MIP) was formed in situ at the surface of the prepared composite via electropolymerization of o-phenylenediamine in the presence of salbutamol as the template molecule. The electrochemical characterizations demonstrate that the bifunctional graphene-based composite shows improved catalytic performance than that of pristine graphene doped with one-component or none. The MIP sensor based on Ag-N-RGO owns high porous surface structure, resulting in the increased current response and enhanced recognition capacity than that of non-imprinted sensor. The outstanding performance of the developed sensor derives from the combined advantages of Ag-N-RGO with effective catalytic property and MIP with excellent selectivity. Under the optimal conditions, the electrochemical response of the developed sensor is linearly proportional to the concentration of salbutamol in the range of 0.03–20.00 µmol L−1 with a low detection limit of 7 nmol L−1. The designed sensor has exhibited the multiple advantages such as low cost, simple manufacture, convenient use, excellent selectivity and good reproducibility. Finally, the proposed method has been extended for the determinations of salbutamol in human urine and pork samples, and the satisfactory recoveries between 98.9–105.3% are achieved. © 2016 Elsevier B.V.
语种:
英文
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Molecularly imprinted fluorescent probe based on FRET for selective and sensitive detection of doxorubicin
作者:
Xu, Zhifeng* ;Deng, Peihong;Li, Junhua;Xu, Li;Tang, Siping
期刊:
Materials Science and Engineering B-Advanced Functional Solid-State Materials ,2017年218:31-39 ISSN:0921-5107
通讯作者:
Xu, Zhifeng
作者机构:
[Tang, Siping; Deng, Peihong; Xu, Zhifeng; Li, Junhua] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Hunan Prov Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Xu, Li] South China Agr Univ, Coll Mat & Energy, Dept Appl Chem, Guangzhou 510642, Guangdong, Peoples R China.
通讯机构:
[Xu, Zhifeng] H;Hengyang Normal Univ, Key Lab Funct Organometall Mat, Hunan Prov Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词:
Doxorubicin;Molecular imprinting;FRET;Molecular recognition;Fluorescent carbon dots
摘要:
In this work, a new type of fluorescent probe for detection of doxorubicin has been constructed by the combined use of fluorescence resonance energy transfer (FRET) technology and molecular imprinting technique (MIT). Using doxorubicin as the template, the molecularly imprinted polymer thin layer was fabricated on the surfaces of carbon dot (CD) modified silica by sol-gel polymerization. The excitation energy of the fluorescent donor (CDs) could be transferred to the fluorescent acceptor (doxorubicin). The FRET based fluorescent probe demonstrated high sensitivity and selectivity for doxorubicin. The detection limit was 13.8 nM. The fluorescent probe was successfully applied for detecting doxorubicin in doxorubicin-spiked plasmas with a recovery of 96.8-103.8%. a relative standard deviation (RSD) of 1.3-2.8%. The strategy for construction of FRET-based molecularly imprinted materials developed in this work is very promising for analytical applications. (C) 2017 Elsevier B.V. All rights reserved.
语种:
英文
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Effect of water on the effective Goldschmidt tolerance factor and photoelectric conversion efficiency of organic-inorganic perovskite: insights from first-principles calculations
作者:
Tang, Zhen-Kun;Zhu, Ya-Nan;Xu, Zhi-Feng;Liu, Li-Min*
期刊:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS ,2017年19(23):14955-14960 ISSN:1463-9076
通讯作者:
Liu, Li-Min
作者机构:
[Xu, Zhi-Feng; Tang, Zhen-Kun] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421008, Peoples R China.;[Xu, Zhi-Feng; Tang, Zhen-Kun] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Tang, Zhen-Kun; Zhu, Ya-Nan; Liu, Li-Min] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
通讯机构:
[Liu, Li-Min] B;Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
摘要:
Water is often believed to be the leading killer of perovskite solar cells' efficiency. However, recent experimental results show that perovskite solar cells have higher photoelectric conversion efficiency in a suitably moist environment. In this study, the relationship between the interstitial water molecule and the theoretical maximum efficiency of the perovskite absorber layer is discussed based on density functional theory calculations. Our calculated results show that an interstitial water molecule can enlarge the effective Goldschmidt tolerance factor, which is an empirical structural parameter for the structure of the perovskite material. The primitive MAPbI3 structure is not the ideal perovskite structure with the highest photoelectric conversion efficiency. Surprisingly, appropriate interstitial water molecules are beneficial to perovskite absorbers in terms of increasing photoelectric conversion efficiency. This can be attributed to the relatively larger effective Goldschmidt tolerance factor of the perovskite structure with an interstitial water molecule, which affects the photoelectric conversion efficiency of the perovskite structure. Our calculations indicate that the perovskite absorbers with a H2O:MAPbI3 ratio of 1/4-1/2 have a relatively higher photoelectric conversion efficiency. This study helps us understand the role of the interstitial molecule in the perovskite structure deeply, which is very useful in the design and optimization of the perovskite absorbers for high-efficiency perovskite cells. © the Owner Societies 2017.
语种:
英文
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苯基在联苯亲电取代反应中的定位作用
作者:
邝代治;张复兴;冯泳兰;许志锋;蒋伍玖
期刊:
化学教育(中英文) ,2017年38(22):73-80 ISSN:1003-3807
作者机构:
衡阳师范学院化学与材料科学学院 湖南衡阳421008;[冯泳兰; 邝代治; 蒋伍玖; 张复兴; 许志锋] 衡阳师范学院
关键词:
联苯;构象分析;电子结构;亲电取代;定位效应
摘要:
运用G03程序,在HF/6-31G基组水平,分析了苯基(RPh)在联苯类化合物(RPh-Ph,R:NH2,CH3,OH,Br,H,CHO,CN,COOH,NO2)亲电取代反应中的定位作用.联苯和取代联苯的构象分析表明,联苯和间、对位取代联苯的碳-碳单键旋转的能垒很小,约12 kJ/mol,邻取代联苯的碳-碳单键旋转能垒ΔE(R)较大,且ΔE(COOH)>ΔE(NO2)>ΔE(CHO)>ΔE(CHk)>ΔE(NH2)>ΔE(O)H)>ΔE(Br)>ΔE(CN),因此,邻位取代基的空间效应较大,碳-碳单键旋转受阻.联苯和取代联苯的原子电荷分布随它们的构象改变而变化,在同一联苯或取代联苯化合物的最低能稳定结构中,无论取代基R为第一类还是第二类定位基,未取代苯环的碳原子总电荷密度比取代苯环碳原子的总电荷密度大,亲电取代反应将选择在未取代的苯环上发生;未取代苯环的邻位碳原子电荷密度较低、空间效应较大,而对位碳原子的电荷密度较大,亲电取代反应难以在该环的2,6-位(邻位)发生,将选择在该苯环的对位发生.因此,取代苯基(RPh-)在联苯的亲电取代反应中主要表现为对位定位基.
语种:
中文
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公费定向师范生中职阶段的化学学习动机对学业成绩的影响及思考
作者:
蒋伍玖;吴小艳;陈智勇;毛芳芳;崔莺;...
期刊:
山东化工 ,2017年46(19):133-135 ISSN:1008-021X
作者机构:
衡阳师范学院化学与材料科学学院,湖南衡阳 421008;功能金属有机材料湖南省普通高等学校重点实验室,湖南衡阳 421008;衡阳师范学院化学与材料科学学院,湖南衡阳,421008;衡阳市皓源实验中学化学教研组,湖南衡阳,421008
关键词:
调查研究;化学;成绩差异;学习动机
摘要:
化学学科作为中学的基本课程之一,对学生的发展有着重要的意义。本研究从学习动机的角度出发,以衡阳师范学院初等教育学院公费定向师范生为研究主体,通过问卷调查,统计分析等方法,研究化学学习动机对学业成绩的影响。在此基础上结合学习动机的理论,因材施教,有针对性地培养学生的良好化学学习动机,对全面提高化学教学质量,落实素质教育具有积极的现实意义。
语种:
中文
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一种用于检测三氯生的电化学传感器及其制备方法和应用
发明/设计人:
李俊华;刘梦琴;许志锋;张复兴;贺娇;...
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201710567293.5
申请时间:
2017-7-12
公开号:
CN107328836A
公开时间:
2017-11-07
主申请人地址:
421000 湖南省衡阳市雁峰区黄白路165号
摘要:
本发明涉及电化学检测技术领域,具体公开了一种用于检测三氯生的电化学传感器及其制备方法和应用。所述的电化学传感器以用于检测三氯生的化学修饰电极为工作电极、Ag‑AgCl为参比电极和铂电极为辅助电极构成三电极体系,将三电极体系组装后与电化学工作站相连构成电化学传感器。所述的用于三氯生定量检测的化学修饰电极以及电化学传感器,该电极或传感器对三氯生具有优异的电催化活性;以及具有极低的检出限、良好的稳定性、抗干扰性和重现性。
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邻取代苯甲酸的结构及基团在亲电取代反应中的定位效应
作者:
邝代治;张复兴;冯泳兰;许志锋;庾江喜
期刊:
衡阳师范学院学报 ,2017年(03):60-64 ISSN:1673-0313
作者机构:
衡阳师范学院 化学与材料科学学院,湖南 衡阳,421008;[庾江喜; 冯泳兰; 邝代治; 张复兴; 许志锋] 衡阳师范学院
关键词:
构象分析;电子结构;亲电取代;定位效应
摘要:
邻取代苯甲酸o-RArCOOH(R:-NH2,-OH,-OMe,-Me,-Ph,-H,-NO2,-CN,-CHO,COOH)的构象分析表明,基团之间相互(包括基团的取向)作用影响分子构象,不同构象其苯环碳原子电荷分布不同,在最低体系作用能时,第一类定位基主导亲电取代反应定位,在邻硝基、氰基、醛基、羧基取代苯甲酸中,硝基、氰基、醛基主导亲电取代反应定位。
语种:
中文
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卤代芳香化合物的羟基化方法
发明/设计人:
王德平;许志锋;张复兴;李薇
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201710317238.0
申请时间:
2017-5-4
公开号:
CN107253894A
公开时间:
2017-10-17
主申请人地址:
421008 湖南省衡阳市雁峰区黄白路165号
摘要:
本发明涉及一种卤代芳香化合物的羟基化方法,该方法以2‑吡啶酮化合物为配体添加剂,以CuI作为催化剂,在相转移催化剂和溶剂的存在下,即可实现MOH与卤代芳香化合物的羟基化反应在温和条件下进行,且反应产率高,底物适用范围广。与文献中报道的同类型反应相比,本发明的方法反应条件温和,产率很高,有很好的应用前景。碘代芳香化合物的羟基化反应在水溶液中90℃就能进行且获得高产率的羟基化产物,反应的温度相比文献中的报道平均可以降低约30℃;溴代芳香化合物在水溶液中羟基化反应在120℃就能进行,反应温度相比文献中的报道平均可以降低约20℃。
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一种快速检测过氧化氢的无酶电化学传感器及其制备方法和应用
发明/设计人:
李俊华;许志锋;刘梦琴;张复兴;郭芬;...
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201710547494.9
申请时间:
2017-7-6
公开号:
CN107356643A
公开时间:
2017-11-17
主申请人地址:
421000 湖南省衡阳市雁峰区黄白路165号
摘要:
本发明涉及电化学检测技术领域,具体公开了一种快速检测过氧化氢的无酶电化学传感器及其制备方法和应用。所述快速检测过氧化氢的无酶电化学传感器的工作电极选用无酶化学修饰电极。所述的无酶化学修饰电极的制备方法,包含如下步骤:(1)制备N‑RGO;(2)制备Ag@Cu<sub>2</sub>O/N‑RGO:(3)将步骤(2)制备得到的Ag@Cu<sub>2</sub>O/N‑RGO修饰在玻碳电极上即得所述的快速检测过氧化氢的无酶化学修饰电极。由本发明无酶化学修饰电极组成的无酶电化学传感器能实现过氧化氢的现场快速检测,具有携带便利、操作简单、成本低廉、灵敏度高和检出限低等优点,在环境保护、食品安全和临床医疗等方面有着广泛的应用前景。
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Facile synthesis of MnO2-embedded flower-like hierarchical porous carbon microspheres as an enhanced electrocatalyst for sensitive detection of caffeic acid
作者:
Li, Junhua;Jiang, Jianbo;Liu, Mengqin;Xu, Zhifeng;Deng, Peihong;...
期刊:
Analytica Chimica Acta ,2017年985:155-165 ISSN:0003-2670
通讯作者:
Qian, Dong;Yang, Chunming
作者机构:
[Liu, Mengqin; Deng, Peihong; Xu, Zhifeng; Li, Junhua; Tong, Chaoying] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Li, Junhua; Jiang, Jianbo; Qian, Dong] Cent S Univ, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.;[Xie, Haobin; Li, Junhua] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.;[Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;[Yang, Chunming] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.
通讯机构:
[Qian, Dong] C;[Yang, Chunming] H;Cent S Univ, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.;Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.
关键词:
Caffeic acid;Carbon microspheres;Electrochemical sensor;MnO(2) nanorods
摘要:
Tailored designs/fabrications of hierarchical porous advanced electrode materials are of great importance for developing high-performance electrochemical sensors. Herein, we demonstrate a simple and low-cost in situ chemical approach for the facile synthesis of MnO<inf>2</inf>-embedded hierarchical porous carbon microspheres (MnO<inf>2</inf>/CM). By the characterizations of scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray powder diffraction and energy dispersive spectroscopy, we evidenced that the synthesized product were flower-like carbon microspheres (CM) assembled by the bent flakes with thickness of about several nanometers and MnO<inf>2</inf>nanorods were highly dispersed and successfully decorated on the CM layers, resulting in a rough surface and three-dimensional microstructure. The greatest benefit from the combined porous CM with MnO<inf>2</inf>nanorods is that the MnO<inf>2</inf>/CM modified electrode has the synergetic catalysis effect on the electro-oxidation of caffeic acid, leading to the remarkable increase in the electron transfer rate and significant decrease in the over-potential for the caffeic acid oxidation in contrast to the bare electrode and CM modified electrode. This implies that the prepared MnO<inf>2</inf>/CM can be employed as an enhanced electrocatalyst for the sensitive detection of caffeic acid. Under the optimum conditions, the anodic peak current of caffeic acid is linear with its concentration in the range of 0.01–15.00 μmol L<sup>−1</sup>, and a detection limit of 2.7 nmol L<sup>−1</sup>is achieved based on S/N = 3. The developed sensor shows good selectivity, sensitivity, reproducibility, and also excellent recovery in the detections of real samples, revealing the promising practicality of the sensor for the caffeic acid detection.<br/> ©2017 Elsevier B.V.
语种:
英文
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一种用于检测酪氨酸的电化学传感器及其制备方法和应用
发明/设计人:
李俊华,刘梦琴,许志锋,张复兴,耿弘吏,贺灵芝
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201710567292.0
申请时间:
2017-7-12
公开号:
CN107153088A
公开时间:
2017-9-12
主申请人地址:
421000 湖南省衡阳市雁峰区黄白路165号
摘要:
本发明涉及电化学检测技术领域,具体涉及一种用于检测酪氨酸的电化学传感器及其制备方法和应用。所述的电化学传感器,以用于检测酪氨酸的化学修饰电极为工作电极,Ag‑AgCl为参比电极,铂丝电极为辅助电极,利用三电极法组装电极测试体系后连接电化学工作站得用于检测酪氨酸的电化学传感器。所述的用于酪氨酸定量检测的化学修饰电极或电化学传感器具有极低的检出限和较宽的检测范围以及良好的稳定性、抗干扰性和重现性。
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一种用于沙丁胺醇定量检测的分子印迹型电化学传感器及其制备方法
发明/设计人:
李俊华;许志锋;刘梦琴;邓培红;唐斯萍;...
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201610705752.7
申请时间:
2016-8-23
公开号:
CN106290518A
公开时间:
2017-01-04
主申请人地址:
421008 湖南省衡阳市雁峰区黄白路165号
摘要:
本发明涉及电分析化学技术领域,具体公开了一种用于沙丁胺醇定量检测的分子印迹型电化学传感器及其制备方法。所述制备方法,包含如下步骤:S1~S4.制备N??RGO;S5.取N??RGO在水中超声分散,然后加入葡萄糖形成溶液A;S6.将NH<sub>3</sub>·H<sub>2</sub>O溶液加入到硝酸银溶液中,形成溶液B;S7.将溶液B和溶液A混合,搅拌,然后陈化,经离心、洗涤、干燥得Ag??N??RGO纳米复合材料;S8.取Ag??N??RGO纳米复合材料分散于有机溶剂中,然后涂覆在工作电极的表面,得Ag??N??RGO修饰电极;S9.将Ag??N??RGO修饰电极置于含邻苯二胺和沙丁胺醇的PBS缓冲溶液中进行循环伏安法扫描;S10.将经步骤S9处理过的电极除去聚合膜中的沙丁胺醇,得到MIP/Ag??N??RGO印迹电极。所述的化学电极或化学传感器具有极低的检出限以及良好的稳定性、抗干扰性和重现性。
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Facile synthesis of 3D porous nitrogen-doped graphene as an efficient electrocatalyst for adenine sensing
作者:
Li, Junhua;Jiang, Jianbo;Feng, Haibo;Xu, Zhifeng;Tang, Siping;...
期刊:
RSC Advances ,2016年6(37):31565-31573 ISSN:2046-2069
通讯作者:
Qian, Dong
作者机构:
[Feng, Haibo; Li, Junhua; Jiang, Jianbo; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;[Tang, Siping; Deng, Peihong; Xu, Zhifeng; Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Li, Junhua; Qian, Dong] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
通讯机构:
[Qian, Dong] C;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
摘要:
In this work, a simple, low-cost and eco-friendly strategy for fabricating the three-dimensional porous nitrogen-doped graphene (3D-N-GN) is demonstrated by combining the hydrothermal assembly and freeze-drying process without using any framework support. The desired features for 3D-N-GN, such as rich macroporosity, nitrogen-doping structure and high active surface area have been confirmed by scanning electron microscopy, X-ray photoelectron spectroscopy and electrochemical techniques, respectively. In comparison with two-dimensional graphene (2D-GN) and nitrogen-doped graphene (2D-N-GN), 3D-N-GN makes a more negative shift in the oxidation peak potential of adenine together with a remarkable increase in the oxidation peak current, highlighting the importance of the nitrogen-doping and 3D construction of the graphene-based support for improving the electrocatalytic performance. It also indicates that 3D-N-GN can be used as an efficient electrocatalyst for adenine sensing. Furthermore, the sensing conditions are optimized and the resulting sensor displays excellent analytical performance in the detection of adenine at low concentrations ranging from 0.02 to 1.20 μM, with a detection limit of 8 nM. Finally, this proposed method not only exhibits preferable reproducibility, stability and adequate sensitivity, but also demonstrates good efficiency in the detection of adenine in biological fluids. ©The Royal Society of Chemistry 2016.
语种:
英文
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师范院校食品工程原理教学探讨
作者:
彭钢;刘剑;许志锋;赖华
期刊:
山东化工 ,2016年45(16):170-171 ISSN:1008-021X
作者机构:
[彭钢; 刘剑; 许志锋; 赖华] 衡阳师范学院化学与材料科学学院;衡阳师范学院湖南省功能金属有机材料重点实验室
关键词:
食品工程原理;教学改革;师范院校
摘要:
《食品工程原理》是食品科学与工程专业的核心课程。本文以地方师范院校的食品工程原理课程为例,综合探讨本课程的教学改革。通过调整教学内容、优化教学方法及改变考核方式等措施提高教学质量,培养学生的实践能力和创新能力。
语种:
中文
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研究型案例在《功能高分子材料》中的教学探讨
作者:
彭钢;许志锋;赖华;李玉林
期刊:
广东化工 ,2016年43(15):269-270 ISSN:1007-1865
作者机构:
衡阳师范学院化学与材料科学学院,湖南衡阳421008;衡阳师范学院湖南省功能金属有机材料重点实验室,湖南衡阳421008
关键词:
功能高分子材料;教学探讨;案例教学;研究型案例
摘要:
《功能高分子材料》是高分子材料专业一门重要的专业课程.文章将研究型案例引入《功能高分子材料》的教学中,并分析案例实施过程,以实际案例形式详细阐述了案例教学的应用.实践结果表明:案例教学提高教学质量,同时有利于加深学生对知识的理解,培养学生的科学素养和综合能力.
语种:
中文
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一种喹诺酮纳米分子印迹聚合物制备方法与应用
发明/设计人:
唐斯萍;杨颖群;许志锋;冯泳兰
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201610088952.2
申请时间:
2016-2-17
公开号:
CN105713156A
公开时间:
2016-6-29
主申请人地址:
421007 湖南省衡阳市雁峰区黄白路165号
摘要:
本发明提供了一种喹诺酮纳米分子印迹聚合物制备方法与应用,通过在固相载体玻璃珠上引入喹诺酮抗生素,得到喹诺酮抗生素衍生的玻璃珠;然后将该玻璃珠与功能单体、交联剂和光引发剂二乙基二硫代氨基羧酸苄酯紫外光照射反应,反应混合物倒入至固相萃取管中,用冷乙腈洗涤玻璃珠,除去未参与反应的功能单体和交联剂后,用热乙腈淋洗,得到分子印迹聚合物;冷却至室温,用微孔超离心过滤分离得到纳米分子印迹聚合物溶液。本发明纳米分子印迹聚合物可用于微量喹诺酮抗生素方面的应用,尤其可用于食品、地表水中喹诺酮抗生素的检测。本发明简单快速、检测特异性高,检出限低。
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一种2-羰基-3-苯基丙酸苯甲酰腙二对甲基苄基锡配合物及其制备方法和应用
发明/设计人:
蒋伍玖;谭宇星;许志锋;赖华;邝代治;...
申请/专利权人:
衡阳师范学院
申请/专利号:
CN201510764231.4
申请时间:
2015-11-11
公开号:
CN105541898A
公开时间:
2016-05-04
主申请人地址:
421002 湖南省衡阳市珠晖区衡花路16号
摘要:
本发明公开了一种2-羰基-3-苯基丙酸苯甲酰腙二对甲基苄基锡配合物,为如下结构式(I)的配合物 <img file="35076dest_path_image002.TIF" wi="230" he="184" />,其中Ph为苯基,R为对甲基苄基。本发明还公开了该2-羰基-3-苯基丙酸苯甲酰腙二对甲基苄基锡配合物的制备方法和在制备抗癌药物中的应用。
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Fluorescent molecularly imprinted polymers based on 1,8-naphthalimide derivatives for efficiently recognition of cholic acid
作者:
Xu, Zhifeng* ;Deng, Peihong;Tang, Siping;Li, Junhua
期刊:
Materials Science and Engineering C: Materials for Biological Applications ,2016年58:558-567 ISSN:0928-4931
通讯作者:
Xu, Zhifeng
作者机构:
[Tang, Siping; Deng, Peihong; Xu, Zhifeng; Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[Xu, Zhifeng] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构:
[Xu, Zhifeng] H;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词:
1,8-naphthalimide;Cholic acid;Fluorescence intensity;Molecular imprinting;Molecular recognition
摘要:
Fluorescent molecularly imprinted polymers (MIPs) have attracted increasing attentions in recent years due to their high selectivity and sensitivity for target molecules. In this study, two cholic acid imprinted fluorescent polymers, i.e., MIP<inf>1</inf>and MIP<inf>2</inf>, were prepared using 4-dimethylamino-N-allylnaphthalimide (F<inf>1</inf>) and 4-piperazinyl-N-allylnaphthalimide (F<inf>2</inf>) as the fluorescent functional monomers, respectively. The fluorescence intensity of MIP<inf>1</inf>decreased linearly with the increase of the template concentration in the range of 1.50-120.0 μM, while the fluorescence intensity of MIP<inf>2</inf>increased linearly with the increase of the template concentration in the range of 0.40-110.0 μM. The detection limits of MIP<inf>1</inf>and MIP<inf>2</inf>for cholic acid were 0.42 and 0.083 μM, respectively. The mechanisms of the fluorescence responsive of the imprinted polymers were discussed. The results of fluorescence measurement and binding experiments demonstrated that both imprinted polymers have high recognition abilities and binding affinities for the template. The imprinted polymers have been successfully applied to the determination of cholic acid in human serums. The present study indicated that 1,8-naphthalimide can be used as a modular building block for design and construction of various fluorogenic molecularly imprinted materials for practical sensing and separation. ©2015 Elsevier B.V. All rights reserved.
语种:
英文
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