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介绍了我国建筑涂料用填料的开发应用情况。填料在建筑涂料中的应用近年来获得了很大的技术进步,例如开发应用了新型填料、增加了填料品种、扩展了一些填料的应用范围、提高了涂料的应用性能。 相似文献
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介绍了变压器的发展概况及干式变压器的特点、应用及存在的问题以及玻璃纤维及其制品在干式变压器中的应用概况及应用要求,尤其是应用玻璃纤维毡解决了干式变压器开裂问题,缩小了干式变压器的体积,节省了原料,也降低了成本,推动了干式变压器技术的发展和应用范围的扩大。 相似文献
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微波技术在水处理领域的应用 总被引:3,自引:0,他引:3
对当前微波辐射技术在水处理领域的应用和研究状况进行了综述,着重介绍了微波加热原理与特点及在水处理领域的应用,讨论了应用中存在的一些问题,并展望了微波技术在水处理领域的应用前景。 相似文献
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《中国石油和化工标准与质量》2019,(14):227-228
本文主要分析了煤矿沉陷充填开采技术的相关应用问题,重点介绍了煤矿沉陷充填开采技术的应用现状和具体的技术应用方案。通过对于煤矿沉陷充填开采技术的应用分析,不仅克服了煤矿开采存在的难题,而且也推动了煤矿沉陷充填开采技术的广泛应用,增加其应用效果、实现绿色开采。 相似文献
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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。 相似文献
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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. 相似文献
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高效液相色谱法分析化妆品中微量成分的研究进展 总被引:1,自引:0,他引:1
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。 相似文献