dirt count

Atmospheric dust plays an important role in the Earth system.

依据青藏高原目前所取得冰芯的尘埃分析结果,初步分析了近1000年来青藏高原南北大气尘埃载荷的时空变化特征。

During the past several years, more and more attention was paid to the study of the dust, especially the dust plasmas.

尘埃粒子大量的存在于自然界中，包括实验过程中。

Seasonal variation characteristics of element concentration of street dust in Lanzhou;

兰州市街道尘埃元素质量分数季节变化特征

A set of environmental magnetic parameters(χ_(lf),χ_(fd)%,χ_(ARM),SIRM,HIRM,SOFT and back field IRM) of the street dust sampled in Lanzhou during spring and summer 2005 were analyzed.

分析了兰州市街道尘埃样品的磁学参数(包括磁化率、无磁滞磁化率、等温剩磁、磁滞回线和热磁曲线)变化特征。

amples of street dust were collected in Lanzhou in January 2006 and element concentration were analyzed by X-ray fluorescence.

用X射线荧光法分析了兰州市街道尘埃样品元素的含量,并利用富集因子分析方法对实验数据进行统计分析,以对比元素浓度的空间变化特征。

The study indicate that addition of polymers agglomeration reagent during flotation deinking of office waste paper can reduce dirt count of deinking pulp and increase in brightness of the product.

采用高分子凝聚剂对办公废纸的油墨颗粒进行浮选脱墨,可降低脱墨浆中的尘埃度并增加产品的白度。

The effects of bleaching on dirt count of bleached whole cotton stalk chemical pulp were studied in this paper.

对漂白对全棉秆漂白化学浆尘埃度的影响进行了研究。

The studies of magnetism of city environment show that coarse magnetic carrier of city street dust, whose frequency-dependent susceptibility is less than 5%,commonly comes from artificial sources.

城市环境磁性研究表明,道路尘埃中的粗颗粒磁性载体(频率磁化率系数χ′FD<5%)多为人为源,磁性矿物以单畴和多畴状态的磁铁矿为主,同时含有少量的赤铁矿和其他磁性矿物;细颗粒磁性载体(χ′FD为7%~11%)多为自然源,磁化率较低(小于100×10-8m3/kg)。

Ninety-seven street dust samples were collected in a sampling peri.

本文选择武汉市东湖主湖区郭郑湖周边道路为研究靶区，以道路尘埃作为研究的载体。