"课程思政"视角下"绿色化学"课程教学设计与评价

结合"绿色化学"课程的特点,通过对课程中蕴含思政元素全面的挖掘与梳理,对教学内容精心的组织和设计,采用多元化的教学手段和方法、教学设计案例展示了将育人元素以"润物无声,潜移默化"的形式贯穿于教学全过程.同时,通过对授课学生进行问卷调查,分析了课程思政实施的效果,表明课程思政的融入良好地实现了育人目标.     

"固体废物处理与处置"课程教学改革与探索

固体废物处理与处置课程是环境工程专业的核心课程之一.在分析课程教学中存在问题的基础上,结合课程特点和教学实践,对该课程的教学内容和教学方法等方面进行了改革与探索,以达到提高教学质量,优化教学过程的目的.     

"固体废物处理与处置"课程课堂教学改革探讨

《固体废物处理与处置》课程是一门应用性较强的课程,对于培养环境类专业学生的工程观念、工程分析能力具有十分重要的作用。针对传统教学方面存在的缺陷,基于"卓越环境工程师培养计划"要求,文章结合作者的教学经验,提出更新教学内容,深化工程实践教学,构建多元课堂教学模式,建立课堂教学师生互评机制,培养会设计、懂工程、懂管理和善创新的卓越人才。     

"汽车电工与电子技术基础"课程思政教学实践

课程思政是当前高校专业课教师开展课程教学的新理念和新模式。根据汽车电工与电子技术基础课程的特点,以单元课教学的教学过程为例,针对专业基础课程教学过程中课程思政的途径和具体方法进行了实践探索。     

浅谈食品质量与安全专业"仪器分析"课程学习

"仪器分析"是食品质量与安全专业重要的一门专业核心课程,是提高学生专业知识技能的必修课程。它是一门内容广泛、实用性强、与现实联系紧密的专业课程,不仅有理论知识的学习,还开设了仪器分析实验课的学习,将理论与实践相结合,开拓学生的视野,培养学生的动手能力、创新思维和解决问题的能力。在学习过程中,根据课程的内容和特点,对于我校食品质量与安全专业的"仪器分析"课程学习提出几点建议,以供参考。     

有机化学"对映异构"课程思政教学设计探究

课程思政是高校教学改革的重要方向,也是大学专业课提升教学质量,实现"知识、能力和情感"协同发展的重要举措.以有机化学中"对映异构"为例,从教学内容、学生学情、教学策略、教学目标等各个教学元素进行了深刻分析,深入挖掘专业课中的思政元素并使其自然融入教学全过程.尤其是,在"教学过程说明"环节,详细阐述了师生活动的组织安排及...     

基于OBE理念的"酶工程"课程改革与教学研究

高等院校课程改革的核心之一,就是将OBE理念贯彻到课程建设中.混合式教学正是培养学生知识应用能力的一种有效的教学模式."酶工程"是生物技术专业主要的核心课,着重培养学生解决实际问题的能力.因此,以OBE理念为指导,借助网络平台,通过混合式教学,针对授课方法、教学内容和考核标准等方面进行探索,增强教师对学生学习情况的监测和过程化指导,提高学生自主学习的意识,培养学生的应用思维,以达到使学生具备解决实际问题能力的目的.     

佛山市顺德新城区降水中污染物的监测和分析

为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。     

Metabolism of trideuterated iso-lignoceric acid in rats in Vivo and in human fibroblasts in culture

Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders, but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-²H₃]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured. A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994.     

高效液相色谱法分析化妆品中微量成分的研究进展

综述了高效液相色谱法在化妆品中防腐剂、防晒剂中紫外线吸收剂以及性激素的检测等几个方面的应用;同时,介绍了分析所用的色谱柱、流动相、使用的检测手段以及样品的提取方法;最后针对目前存在的问题,提出了高效液相色谱用于化妆品中微量成分分析的研究方向和发展前景。     

Denitrification in shallow groundwater in a coastal agricultural area in Japan

In a coastal agricultural area in the central part of Japan (Shizuoka), we found decreasing nitrate concentration with depth in a shallow groundwater, where the depth to water table varied between 0.6 and 1.2 m below ground surface. High nitrate concentrations (5–29 mg N L^–1) were often observed in the upper layer (0–2 m) of the groundwater, but the concentration decreased to less than 1 mg N L^–1 in the deeper layer. Ammonium was scarcely detected, and the concentration of dissolved oxygen was usually low (< 1 mgO₂ L^–1) in the groundwater. Nitrate in the groundwater often had very heavy nitrogen stable isotope ratios (>20{}). There was a negative relationship between nitrogen stable isotope ratio of nitrate and its concentration. When nitrate was injected into the groundwater with acetylene and bromide (a conservative tracer), nitrate concentration decreased to 20% of the initial level within 5 days, accompanied by the increase in nitrite and nitrous oxide concentration and a little change in bromide concentration. These results indicate that microbial denitrification plays a potential role in the decrease of nitrate in shallow groundwater at the study site.     

我国硝酸工业生产技术新进展

系统叙述了我国硝酸工业2000-2007年生产现状及主要技术成果,尤其指出了国产"四合一"机组的成功投运,使我国硝酸国产化装置取得较大的进步,表现在吨酸的铂耗、氨耗和能耗等方面接近国外引进装置水平,同时介绍了国外双加压法硝酸生产技术的进展.我国已成为硝酸生产大国,仍需以先进的技术改造和发展我国硝酸工业,确保我国硝酸工业健康有序地发展,加快从硝酸生产大国向强国迈进的步伐.