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学者姓名：郑欧
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Abstract ：
本文针对现有物理化学实验教材中的“乙酸乙酯皂化反应速率常数的测定”实验进行改进和拓展。首先，以夹套烧杯为皂化反应池，通过恒温水循环及磁力搅拌确保了实验过程中溶液浓度均匀、温度恒定；其次，取一定体积浓度为0.01 mol·L~(-1)的氢氧化钠溶液于反应池中待恒温后测定电导率值，记为κ_0，再使用微量取样器取等摩尔数的乙酸乙酯加入到反应器中并同时计时，测定不同时间的电导率值，记为κ_t；第三，通过数据归一化处理消除了电极常数的影响，使物理量意义明确、实验现象直观。改进后的实验步骤减少、数据测量准确性提高，可以测量高温条件下、快速的皂化反应速率常数，在有限的课时内学生可以通过分工协作、共享数据，获得表观活化能及指前因子。
Keyword ：
指前因子 指前因子 物理化学实验 物理化学实验 皂化反应 皂化反应 表观活化能 表观活化能 速率常数 速率常数
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| GB/T 7714 | 祝淑颖 , 吴舒婷 , 郑欧 . 乙酸乙酯皂化反应速率常数的测定实验改进和拓展 [J]. | 大学化学 , 2024 , 39 (04) : 107-113 . |
| MLA | 祝淑颖 等. "乙酸乙酯皂化反应速率常数的测定实验改进和拓展" . | 大学化学 39 . 04 (2024) : 107-113 . |
| APA | 祝淑颖 , 吴舒婷 , 郑欧 . 乙酸乙酯皂化反应速率常数的测定实验改进和拓展 . | 大学化学 , 2024 , 39 (04) , 107-113 . |
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通过改装二元气液平衡系统相图绘制实验的装置,同时测定了环己烷-乙醇气液系统建立平衡时的沸点和露点温度,绘制并对比未保温、保温和温度补偿条件下的环己烷-乙醇气液相图.研究发现,由于分馏效应的存在,未保温和简易保温情况下,测得的溶液的沸点与露点两者温度均存在较大的差异,利用沸点温度绘制的气相线存在严重失真;对系统进行了温度补偿后根据沸点和露点温度绘制的两条气相线能吻合较好,即气相分馏效应得到了解决.
Keyword ：
分馏效应 分馏效应 气液相图绘制 气液相图绘制 温度补偿 温度补偿 物理化学 物理化学
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| GB/T 7714 | 宋丽平 , 王亚婷 , 郑欧 et al. 温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应 [J]. | 大学化学 , 2020 , 35 (1) : 87-91 . |
| MLA | 宋丽平 et al. "温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应" . | 大学化学 35 . 1 (2020) : 87-91 . |
| APA | 宋丽平 , 王亚婷 , 郑欧 , 吴舒婷 , 祝淑颖 , 陈建中 . 温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应 . | 大学化学 , 2020 , 35 (1) , 87-91 . |
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本发明提出一种带智能温度补偿系统的双液系气液平衡相图沸点仪，包括控制模块和加热区，烧瓶瓶肚处与补偿加热器相接，烧瓶瓶塞处固定主加热器；所述主加热器包括从瓶腔上部延伸至下部的直杆和设于直杆末端的发热体；烧瓶瓶腔下部设有液相温度传感器；瓶腔上部设有气相温度传感器；气相温度传感器、液相温度传感器和补偿加热器与控制模块相连；当控制模块的温度自动补偿模式开启时，如气相温度传感器、液相温度传感器测得的气相液相温度差达到阈值，则控制模块控制补偿加热器发热以使瓶腔气相温度与液相温度达到平衡；本发明能自动采集数据根据沸点对双液系气液平衡体系进行温度补偿，从而将分馏效应现象降低最低，真正实现同一温度的气液平衡。
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| GB/T 7714 | 郑欧 , 祝淑颖 , 陈建国 et al. 一种带智能温度补偿系统的双液系气液平衡相图沸点仪 : CN201810087090.0[P]. | 2018/1/30 . |
| MLA | 郑欧 et al. "一种带智能温度补偿系统的双液系气液平衡相图沸点仪" : CN201810087090.0. | 2018/1/30 . |
| APA | 郑欧 , 祝淑颖 , 陈建国 , 张栢茂 , 陈东毅 , 李浩宏 . 一种带智能温度补偿系统的双液系气液平衡相图沸点仪 : CN201810087090.0. | 2018/1/30 . |
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本实用新型提出一种带智能温度补偿系统的双液系气液平衡相图沸点仪，包括控制模块和加热区，烧瓶瓶肚处与补偿加热器相接，烧瓶瓶塞处固定主加热器；主加热器包括从瓶腔上部延伸至下部的直杆和设于直杆末端的发热体；瓶腔下部设有液相温度传感器；瓶腔上部设有气相温度传感器；气相温度传感器、液相温度传感器和补偿加热器与控制模块相连；当控制模块的温度自动补偿模式开启时，如气相温度传感器、液相温度传感器测得的气相液相温度差达到阈值，则控制模块控制补偿加热器发热以使瓶腔气相温度与液相温度达到平衡；本实用新型能自动采集数据根据沸点对双液系气液平衡体系进行温度补偿，从而将分馏效应现象降低最低，真正实现同一温度的气液平衡。
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| GB/T 7714 | 郑欧 , 祝淑颖 , 陈建国 et al. 一种带智能温度补偿系统的双液系气液平衡相图沸点仪 : CN201820151239.2[P]. | 2018/1/30 . |
| MLA | 郑欧 et al. "一种带智能温度补偿系统的双液系气液平衡相图沸点仪" : CN201820151239.2. | 2018/1/30 . |
| APA | 郑欧 , 祝淑颖 , 陈建国 , 张栢茂 , 陈东毅 , 李浩宏 . 一种带智能温度补偿系统的双液系气液平衡相图沸点仪 : CN201820151239.2. | 2018/1/30 . |
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考查了环己烷-乙醇气液体系建立平衡需要的加热时间和平衡时气相中的温度分布情况,以及自制保温隔热套对这两者的影响.实验表明,给玻璃沸点仪套上保温隔热套能缩短建立气液平衡需要的加热时间,减少蒸馏瓶内气相的温度分布梯度和分馏效应,确保绘制的相图更准确.
Keyword ：
分馏效应 分馏效应 气液相图绘制 气液相图绘制 物理化学 物理化学
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| GB/T 7714 | 郑欧 , 张栢茂 , 祝淑颖 et al. 环己烷-乙醇气液平衡体系相图绘制实验中的分馏效应及改进方法 [J]. | 大学化学 , 2018 , 33 (10) : 85-90 . |
| MLA | 郑欧 et al. "环己烷-乙醇气液平衡体系相图绘制实验中的分馏效应及改进方法" . | 大学化学 33 . 10 (2018) : 85-90 . |
| APA | 郑欧 , 张栢茂 , 祝淑颖 , 黄长沧 , 吴舒婷 , 李浩宏 . 环己烷-乙醇气液平衡体系相图绘制实验中的分馏效应及改进方法 . | 大学化学 , 2018 , 33 (10) , 85-90 . |
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本发明公开了一种印染生产中染色塑料件除色剂及其使用方法，所述除色剂是由A、B组分组成，按重量份数计，A组分的原料包括：次氯酸钙10~95份、次氯酸镁10~95份、次氯酸钠10~95份、次氯酸钾1~10份、CTAB 1~5份、SDS 1~5份；B组分的原料包括：草酸1~100份、醋酸1~100份、盐酸1~3份和H2SO4 1~35份。本发明以酸作催化剂，在渗透剂协同作用下，除色剂实现塑料件高效除色，并且几乎无废液产生，高效环保；对染色塑料件的处理成本低于200元/吨，经除色处理后塑料价值由不到5000元/吨提升至8000元/吨，每吨能够节约成本大约3000元。
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| GB/T 7714 | 郑欧 , 林振宇 . 一种印染生产中染色塑料件除色剂及其使用方法 : CN201711360269.0[P]. | 2017/12/18 . |
| MLA | 郑欧 et al. "一种印染生产中染色塑料件除色剂及其使用方法" : CN201711360269.0. | 2017/12/18 . |
| APA | 郑欧 , 林振宇 . 一种印染生产中染色塑料件除色剂及其使用方法 : CN201711360269.0. | 2017/12/18 . |
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在基础物理化学实验界面移动法测定离子迁移数中,针对传统实验方案所用镉电极存在的不足之处,改用铜电极进行了平行对比实验,发现采用铜电极的实验方案在保证实验数据有良好准确度的前提下,既能降低电极材料的毒性,也能降低实验相关设备的配置要求.
Keyword ：
电极 电极 界面移动法 界面移动法 离子迁移数 离子迁移数 阳极材料 阳极材料
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| GB/T 7714 | 吴舒婷 , 张惠芳 , 谭翊鑫 et al. 界面移动法测定离子迁移数实验的优化 [J]. | 大学化学 , 2016 , 31 (2) : 24-28 . |
| MLA | 吴舒婷 et al. "界面移动法测定离子迁移数实验的优化" . | 大学化学 31 . 2 (2016) : 24-28 . |
| APA | 吴舒婷 , 张惠芳 , 谭翊鑫 , 郑欧 , 高绍康 , 李奕 et al. 界面移动法测定离子迁移数实验的优化 . | 大学化学 , 2016 , 31 (2) , 24-28 . |
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A fluorometric method for pyrophosphatase (PPase) activity detection was developed based on click chemistry. Cu(II) can coordinate with pyrophosphate (PPi), the addition of pyrophosphatase (PPase) into the above system can destroy the coordinate compound because PPase catalyzes the hydrolysis of PPi into inorganic phosphate and produces free Cu(II), and free Cu(II) can be reduced by sodium ascorbate (SA) to form Cu(I), which in turn initiates the ligating reaction between nonfluorescent 3-azidocoumarins and terminal alkynes to produce a highly fluorescent triazole complex, based on which, a simple and sensitive turn on fluorometric method for PPase can be developed. The fluorescence intensity of the system has a linear relationship with the logarithm of the PPase concentration in the range of 0.5 and 10 mU with a detection limit down to 0.2 mU (S/N = 3). This method is cost-effective and convenient without any labels or complicated operations. The proposed system was applied to screen the potential PPase inhibitor with high efficiency. The proposed method can be applied to diagnosis of PPase-related diseases.
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| GB/T 7714 | Xu, Kefeng , Chen, Zhonghui , Zhou, Ling et al. Fluorometric Method for Inorganic Pyrophosphatase Activity Detection and Inhibitor Screening Based on Click Chemistry [J]. | ANALYTICAL CHEMISTRY , 2015 , 87 (1) : 816-820 . |
| MLA | Xu, Kefeng et al. "Fluorometric Method for Inorganic Pyrophosphatase Activity Detection and Inhibitor Screening Based on Click Chemistry" . | ANALYTICAL CHEMISTRY 87 . 1 (2015) : 816-820 . |
| APA | Xu, Kefeng , Chen, Zhonghui , Zhou, Ling , Zheng, Ou , Wu, Xiaoping , Guo, Longhua et al. Fluorometric Method for Inorganic Pyrophosphatase Activity Detection and Inhibitor Screening Based on Click Chemistry . | ANALYTICAL CHEMISTRY , 2015 , 87 (1) , 816-820 . |
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Owning to the characteristics such as high sensitivity and simplicity of apparatus, electrochemiluminescence (ECL) has become a powerful analytical technique and has been widely used. Ru(phen)(3)(2+) can be intercalated into the grooves of dsDNA and act as an ECL probe efficiently, which has been applied to develop a sensitive ECL biosensor for folate receptor in this study. One ssDNA with a thiol group at its 3' termini had been modified on the Au electrode first, and the other ssDNA with folic acid at its 3' termini hybridized with the former one being modified on the electrode surface to form a dsDNA. In the absence of folate receptor, the 3'-terminus in the dsDNA region can be specificity hydrolyzed into mononucleotides by ExoIII and on dsDNA presents on the electrode surface, leading to the lower of ECL intensity detected. However, in the presence of the target (folate receptor), ExoIII failed to hydrolyze the dsDNA since the one 3'-terminus had been protected by the target and the other protected by the Au electrode, resulting in the enhancement of ECL intensity. The enhanced ECL intensity has a linear relationship with the logarithm of folate receptor concentration in the range of 0.66 nmol/L and 26.31 nmol/L with a detection limit of 0.1204 nmol/L. The proposed biosensor had been applied to detect HeLa cells concentration with satisfied results. (c) 2014 Elsevier B.V. All rights reserved.
Keyword ：
Biosensor Biosensor Electrochemiluminescence Electrochemiluminescence Folate receptor Folate receptor Terminal protection Terminal protection
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| GB/T 7714 | Li, Ruibao , Wang, Chunmei , Hu, Yuhua et al. Electrochemiluminescence biosensor for folate receptor based on terminal protection of small-molecule-linked DNA [J]. | BIOSENSORS & BIOELECTRONICS , 2014 , 58 : 226-231 . |
| MLA | Li, Ruibao et al. "Electrochemiluminescence biosensor for folate receptor based on terminal protection of small-molecule-linked DNA" . | BIOSENSORS & BIOELECTRONICS 58 (2014) : 226-231 . |
| APA | Li, Ruibao , Wang, Chunmei , Hu, Yuhua , Zheng, Ou , Guo, Longhua , Lin, Zhenyu et al. Electrochemiluminescence biosensor for folate receptor based on terminal protection of small-molecule-linked DNA . | BIOSENSORS & BIOELECTRONICS , 2014 , 58 , 226-231 . |
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A novel portable chemical sensor is developed in combination of the personal glucose meters (PGM) with click chemistry for sensitive and selective determination of histidine. Invertase-labeled alkynyl-DNA can be modified onto the surfaces of Streptavidin Magnespheres Paramagnetic Particles (PMPs) through copper(I) catalyzed azide-alkyne cycloaddition (CuAAC) reaction and formed invertase-functionalized PMPs, which can be separated easily. The presence of invertase can convert sucrose to glucose and can be monitored by the PGM easily. The presence of histidine can inhibit the CuAAC, so the read-out signal of PGM decreased. The difference in signals from the PGM before and after addition of histidine has a good linear correlation with the logarithm of the histidine concentrations in the range of 0.01 similar to 100 mu M with a detection limit of 3.4 nM, which is lower than those of many other chemical sensors. Moreover, the assay of histidine in milk samples is demonstrated with satisfactory results. (C) 2013 Elsevier B.V. All rights reserved.
Keyword ：
Click chemistry Click chemistry Histidine Histidine Invertase Invertase Milk Milk Personal glucose meters Personal glucose meters
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| GB/T 7714 | Zhou, Jin , Xu, Kefeng , Zhou, Ping et al. A portable chemical sensor for histidine based on the strategy of click chemistry [J]. | BIOSENSORS & BIOELECTRONICS , 2014 , 51 : 386-390 . |
| MLA | Zhou, Jin et al. "A portable chemical sensor for histidine based on the strategy of click chemistry" . | BIOSENSORS & BIOELECTRONICS 51 (2014) : 386-390 . |
| APA | Zhou, Jin , Xu, Kefeng , Zhou, Ping , Zheng, Ou , Lin, Zhenyu , Guo, Longhua et al. A portable chemical sensor for histidine based on the strategy of click chemistry . | BIOSENSORS & BIOELECTRONICS , 2014 , 51 , 386-390 . |
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