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- negative air ion content 负离子浓度
- The negative air ion concentration in different communities were as follows: lower greenbelt>woodland>weed land>bald land>concrete piazza. 不同植被类型由高到低依次为：花卉绿地＞林地＞宜林荒草地＞裸露地＞水泥广场；
- Fixing and Negative Air Ion Effect on Silk by Sol-Gel Process 溶胶凝胶法对真丝绸的固色及负离子效应
- Methodological Study on Measurement of Negative Air Ion 空气负离子剂量测量方法的探讨
- Spatio-temporal changes of negative air ion concentrations in Beijing 北京地区空气负离子浓度时空变化特征的研究
- Study on the Contribution of Winter-season Crops to Negative Air Ion 冬季田间农作物对环境空气负离子浓度影响的研究
- electrically generated negative air ions (ENIs) 空气负离子
- Assessment of air cleanness degree in Beijing using negative air ion concentration as an index 用空气负离子浓度对北京地区空气清洁度进行初步评价
- Keywords Negative Air Ion;Inspirable Particle Concentration;Indoor Air Quality Monitoring; 空气负离子浓度;可吸入颗粒物浓度;室内空气质量监测;
- negative air ion 空气负离子
- Negative air ion concentration 空气负离子浓度
- Keywords electrically generated negative air ions（ENIs）;Caenorhabditis elegans;development;lifespan;brood size; 空气负离子;秀丽隐杆线虫;发育;寿命;繁殖性能;
- The increasing trend of the total ion content from east to west is consistent with their spatial autocorrelation. 河水离子总量自东部向西部递增的趋势在该水系空间自相关图中得到很好的反映.
- When the water mass fraction is higher than 50%, its EC is determined only by the total ion content without connection with the moisture. 当基质质量含水率大于50%25后，电导率主要受基质内离子总量的影响，可忽略水分的影响。
- This article described the principle and experimental method of determining fluorine ion content of water by method of ion selective electrode. 本文阐述用离子选择电极法测定水中氟离子含量的原理及实验方法。
- The fabric made of coconut-charcoal was found that the negative ions content is more than 650pcs/cm3, the wave rate of F.I.R can be above 0.9. 经抽纱制成布料后，经检测结果，负离子含量在650颗/cm3以上 远红外线放射波率在 0.;9以上。
- In this paper the application of photothermal deflection spectroscopy to the detection of fluoride ion content in water is described. 本文应用光热偏转光谱(PDS)检测水中微量元素氟离子的含量。
- negative air ions concentration 空气负离子浓度
- negative air ions 空气负离子
- The uncertainty of measurement for the determination of chloride ion content in compound fertileizer by ammonium thiocyanate titration method was evaluated. 对硫氰酸铵滴定法测定复混肥料中氯离子含量的测量不确定度进行了评定。
