采用精密自动绝热量热仪器在80～400 K温度范围内测量纯度为0.9903摩尔分数的2-巯基噻唑啉的热容.结果证明,在测量温度范围内只有一个固-液熔化相变,通过计算可得2-巯基噻唑啉的熔化温度Tm、摩尔熔化焓ΔfusHm、摩尔熔化熵 ΔfusSm值分别为377.49±0.02 K、12.07±0.02 kJ·mol-1、31.97±0.04 J·K-1·mol-1.报道了在298.15～400 K的实验温度范围内,2-巯基噻唑啉以5 K为间距的热力学函数H(T)-H(298.15)、S(T)-S(298.15)、G(T)-G(298.15)值.采用差示扫描量热法测定样品的热容并与绝热量热法进行比较.通过使用热重分析法对2-巯基噻唑啉的热分解行为进行研究,得到了分解反应过程中2-巯基噻唑啉的相关动力学参数,为进一步应用2-巯基噻唑啉在药物合成和性质分析中提供了重要参考,其中反应级数n、频率因子A以及活化能E的值分别为1.78、1.150×1059 min-1、603.8 kJ·mol-1.

本文阐述了沈阳工业大学在非化工类专业的化工基础课程教学中,通过提高学生的学习兴趣入手,采取分专业制定教学大纲并因材施教、实施案例教学法和互动式教学及改革平时成绩考核办法等三方面措施改善教学效果的做法.教改激发了学生的学习热情,提高了学生对化工基础课的学习兴趣和学习自主性,有效地改善了教学效果.

为了探讨化合物(2a～2c)合成工艺的影响因素,以6,7-二取代的喹唑啉酮(1a～1c)为起始原料,在催化剂(大孔树脂和三乙烯二胺)存在下,与等摩尔的二氯亚砜为氯代试剂反应得到目标产物;将目标产物粗品在乙酸乙酯和石油醚中重结晶纯化,得到2a～2c,产物结构通过1 H NMR及ESI-MS进行了表征.结果表明:通过重结晶纯化后得到的2a～2c的收率大于90％,色谱纯度大于99％;实验所采用的合成方法操作简单,满足"原子经济学"的要求,经济环保,适合工业化生产.

按照应用型人才培养目标,将基础化学中的无机化学、分析化学、有机化学、物理化学课程涉及的实验内容作为一个整体统筹安排、内容合理衔接,避免了实验内容重复,减少了验证性实验项目,增加了综合性、设计性实验项目,开设了化学虚拟仿真实验,突出了实验的应用性教学.通过基础化学实验,使学生掌握了基本的实验技能,培养了学生动手操作和分析解决实际问题的能力.

根据应用型人才培养的特点,把化工类专业基础化学中的无机化学、分析化学、有机化学、物理化学课程作为一个整体统筹优化,将理论课程和实验课理体系及教学内容进行精简、调整、创新,建立了适用于化工类专业应用型人才培养的基础化学课程体系与教学内容.改革后的基础化学课程之间衔接合理、内容精干、减少重复、突出应用,理论课程和实验课程内容有机衔接,有利于学生掌握必要的理论知识和基本的实验技能.

本文对本科生物理化学课程相图教学中容易出现的错误进行了讨论,指出了在相应教学中应注意的问题.

本文对本科生物理化学课程电化学部分的教学中容易出现的错误进行了讨论,指出了相应教学中应注意的问题.

本文针对物理化学教学中特殊区位自由度的教学难点,讨论和指出了相图教学中应注意的问题.

对脱硫灰中氯离子含量的测定方法进行了研究，建立了用佛尔哈德返滴定法测定氯离子含量的方法。对方法的反应条件进行了选择；对样品中杂质离子可能产生的干扰进行了分析；通过试验，找出了影响测定结果的操作因素，确定了最佳反应条件，进行了方法的回收率和重复性试验。方法的准确度高，精密度良好。

The heat capacities of uracil and 5-bromouracil were measured using a quantum design physical property measurement system (PPMS) in the temperature range of 1.9-300 K. The experimental results indicate that the heat capacities of the two compounds increase with increasing temperature, and no thermal anomalies are observed across the whole temperature range studied. The heat capacity values of 5-bromouracil are larger than those of uracil as it has a higher molecular weight but a similar molecular structure. The heat capacities were fitted to theoretical models and the thermodynamic functions were calculated based on the curve fitting. The standard molecular entropies at 298.15 K were determined to be (132.48 +/- 1.32) and (165.39 +/- 1.65) J.K-1.mol(-1) for uracil and 5-bronnouracil, respectively.

The heat capacities of D-galactose and galactitol were measured on a quantum design physical property measurement system(PPMS) over a temperature range of 1.9―300 K, and the experimental data were fitted to a function of T using a series of theoretical and empirical models in appropriate temperature ranges. The fit results were used to calculate thermodynamic function values, C p,m θ , Δ 0 T S m θ , and Δ 0 T H m θ from 0 K to 300 K. The standard molar heat capacity, entropy and enthalpy values of D-galactose and galactitol at 298.15 K and 0.1 MPa were determined to be C p,m θ =(227.96±2.28) and (239.50±2.40) J·K−1·mol−1, S m θ = (211.22±2.11) and (230.82±2.30) J·K−1·mol−1 and H m θ = (33.95±0.34) and (36.57± 0.37) kJ/mol, respectively.

就物理化学教学中如何营造轻松愉快的教学氛围,提高教学效果,引导学生正确树立“三观”,从凸显马克思主义哲学的世界观与方法论、适度引入人文元素两个方面展开讨论.

The electrochemical oxidation of 2,4,6-trinitrophenol on Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and 2,4,6-trinitrophenol has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of 2,4,6-trinitrophenol. Some electro-generated reagent formed in the electrolysis process and 2,4,6-trinitrophenol could be oxidized by the electro-generated reagent. The Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC), and the chemical oxygen demand(COD) was determined by the potassium dichromate method. The mechanism of 2,4,6-trinitrophenol be oxided was studied primarily by the cyclic voltammetry and UV-visible spectrometry. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of 2,4,6-trinitrophenol contained in the waste water.

The electrochemical oxidation of 2,4,6-trinitrophenol on Ti/SnO2-Sb2O5/PbO2electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and 2,4,6-trinitrophenol has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of 2,4,6-trinitrophenol. Some electro-generated reagent formed in the electrolysis process and 2,4,6-trinitrophenol could be oxidized by the electro-generated reagent. The Ti/SnO2-Sb2O5/PbO2electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC), and the chemical oxygen demand (COD) was determined by the potassium dichromate method. The mechanism of 2,4,6-trinitrophenol be oxided was studied primarily by the cyclic voltammetry and UV-visible spectrometry. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of 2,4,6-trinitrophenol contained in the waste water.

The electrochemical oxidation of 4-chlorophenoxyacetic acid on Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of 4-chlorophenoxyacetic acid. The Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC) and the chemical oxygen demand(COD) was determined by the potassium dichromate method. The mechanism of 4-chlorophenoxyacetic acid be oxided was studied primarily. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of 4-chlorophenoxyacetic acid contained in the waste water.

p-v图、T-s图是进行热力分析、热力计算的重要工具。合理运用图、图教学,能准确或定性的描述工程基本概念、理论及工程现象;分析、比较热力过程、热力循环;提高学生运用工程图形语言巧妙、形象、直观地分析问题、解决问题的能力。

An optimized electrochemical oxidation method for the treatment of containing imazethapyr waste water has been established in this paper. The influence of mass transfer in the degradation process of electrochemical oxidation of imazethapyr on Ti/SnO 2-Sb 2O 3/PbO 2 anode was investigated by cyclic voltammetry and constant current electrolysis. The factors which influence mass transfer and the degraded reaction of imazethapyr were optimized systematically, and a simplified and efficient process for the treatment of containing imazethapyr waste water was established. The oxidized mechanism of imazethapyr on Ti/SnO 2-Sb 2O 3/PbO 2 anode was primarily studied by cyclic voltammetry and ultraviolet (UV) spectrophotometry. The concentration of imazethapyr was monitored by high performance liquid chromatography(HPLC) in the process of electrolysis, and the removal of chemical oxygen demand(COD) was evaluated by the potassium dichromate method. The experimental results show that the properties of waste water, the operating conditions of electrolysis and the mass transfer conditions of waste water influence evidently on the reaction of electrochemical degradation of imazethapyr on Ti/SnO 2-Sb 2O 3/PbO 2 anode. The results of electrolysis experiments demonstrated the possibility of the Ti/SnO 2-Sb 2O 3/PbO 2 anode used in the waste water treatment of imazethapyr by electrochemical oxidation.

The electrochemical oxidation of fomesafen on Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and fomesafen has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of fomesafen. Some electro-generated reagent formed in the electrolysis process and fomesafen could be oxidized by the electro-generated reagent. The Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC), and the chemical oxygen demand(COD) was determined by the potassium dichromate method. The mechanism of fomesafen be oxided was studied primarily by the cyclic voltammetry and UVvisible spectrometry. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of fomesafen contained in the waste water.

The electrochemical oxidation of fomesafen on Ti/SnO2-Sb 2O5/PbO2electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and fomesafen has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of fomesafen. Some electro-generated reagent formed in the electrolysis process and fomesafen could be oxidized by the electro-generated reagent. The Ti/SnO2-Sb2O5/PbO2electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC) , and the chemical oxygen demand(COD) was determined by the potassium dichromate method. The mechanism of fomesafen be oxided was studied primarily by the cyclic voltammetry and UV-visible spectrometry. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of fomesafen contained in the waste water. © 2011 IEEE.

The electrochemical oxidation of fomesafen on Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and fomesafen has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of fomesafen. Some electro-generated reagent formed in the electrolysis process and fomesafen could be oxidized by the electro-generated reagent. The Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC) , and the chemical oxygen demand(COD) was determined by the potassium dichromate method. The mechanism of fomesafen be oxided was studied primarily by the cyclic voltammetry and UV visible spectrometry. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of fomesafen contained in the waste water.