我国火电煤灰渣及掺渣主体墙材产量调研分析

调研并分析了1980～2012年间我国燃煤火电灰渣产量及综合利用现状.通过已公开发表文献及国内相关统计年鉴,收集煤灰渣的相关信息及数据;研究所得数据及数据间的相关性,利用回归方法估算缺失及无法获取的数据,并通过统计方法检验数据可靠性;初步给出了1980～2012年间我国燃煤火电灰渣产量及掺煤灰渣主体墙材产量.该研究结果,可为我国能源政策制定以及煤的综合利用对环境的影响评价提供数据支持.     

关于制订热固性粉末涂料产品国家标准的建议

对用于电冰箱，洗衣机，电风扇等家电的环氧树脂，聚酯树脂等热固性粉末涂料，提出制定国家技术标准的建议。     

内装饰铝型材用消光粉末涂料的研究（I）

在聚酯、环氧、消光固化剂体系中,详细讨论了聚酯树脂的酸值、聚酯/环氧树脂的质量比、消光固化剂用量、颜填料品种、各种助剂对涂膜外观、光泽及其他性能的影响,为设计消光粉末涂料配方提供了必要的试验数据.     

粉末涂料的相关标准

简要介绍了粉末涂料的性能及常用测试方法标准、粉末涂料现行的相关标准及RoHS指令。     

基于专利数据的世界农林废弃物循环利用能源技术分析

以德温特世界专利索引中检索到的农林废弃物循环能源技术相关专利数据为基础,使用Thomson Innovation专利分析工具,通过计量统计、引证分析、可视化文本聚类等方法,揭示农林废弃物循环能源技术3大领域--气化技术、液化技术和燃烧技术的发展现状和趋势,以期为我国相关企业研发策略及宏观产业战略的制定提供参考。     

影响抽油泵使用寿命的要因分析及治理对策

本文通过大量现场数据统计及资料分析,对抽油泵使用寿命的影响因素进行归类汇总,确定了影响抽油泵寿命的主要问题:活塞上凡罩断脱、固定凡尔漏失.同时进一步研究导致活塞上凡罩断脱、固定凡尔漏失的末端因素,并制定了相关治理对策.     

发展中的中国粉末涂料行业

美国次贷引发的全球金融风暴导致全球粉末涂料行业结构发生变化。以中国化工学会涂料涂装专业委员会统计的公示资料为依据,分析了2008年我国粉末涂料行业由此而带来的变化情况。     

我国粉末涂料用环氧树脂市场现状与前景分析

介绍了环氧及环氧聚酯粉末涂料的主要用途,环氧粉末涂料下游应用领域家电、船舶、输油管道、汽车业的发展状况,统计了粉末涂料用环氧树脂近年的消费量,并对未来几年的消费前景作出了预测。     

环境监测数据统计与分析的应用

近年来,数据统计、分析在环境监测中得到了广泛应用和关注。主要介绍了环境数据统计与分析的必要性,结合相关实践经验提出了WPS工作表在环境数据统计分析中的有效应用。     

2020年中国粉末涂料行业运行分析

以中国化工学会涂料涂装专业委员会和全国涂料工业信息中心的行业统计数据、国家统计局发布的数据及行业调研为基础,阐述了 2020年我国粉末涂料及其原料和制粉设备行业运行概况,提出了未来行业发展建议.     

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.     

Phospholipid metabolism in cells in culture

The proportions of the different lecithin fractions have been determined in HeLa and KB tissue culture cells and Ehrlich Ascites tumor. 82.8% of the total phosphatidyl choline phosphorus is found in fraction 3 of HeLa cells. The major phosphatidyl cholines found in KB cells and Ehrlich Ascites tumor are in fractions 3 and 4 and representing 66.6% and 88.7% of the total phosphatidyl choline P, respectively. The incorporation of 1,2-¹⁴C-choline and 1,2-¹⁴C-ethanolamine into the various phosphatidyl choline fractions has been assayed to determine their biosynthesis in Ehrlich Ascites tumor. The incorporation of 1,2-¹⁴C-choline into fractions 3 and 4 is 100 times the 1,2-¹⁴C-ethanolamine. This evidence indicates that the methylation pathway of phosphatidyl choline synthesis is very low in HeLa, KB and Ehrlich Ascites cells. One of 13 papers presented at the symposium “Lipid Metabolism in Cells in Culture,” AOCS Meeting, Houston, May 1971. Part of a thesis submitted to the Graduate School of the University of North Dakota in partial fulfillment of the Degree of Master of Science.     

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.