In this paper, a study of the relationship between characteristic parameters of fine powder which consists of cement and slag in a certain proportion and water content of pastes at standard consistency, fluidity of mortars was made.
将不同颗粒群分布的矿粉与水泥按一定比例混合,探讨了该体系颗粒群特征参数与其净浆标准稠度用水量和胶砂流动度的关系。
The values of net water flux(NWF),drug absorption rate constant(K_a) and drug apparent intestinal permeability(P_(app)) by the gravimetry were compared with the ones by phenol red assay.
方法:以长春西汀为模型药物,采用大鼠在体肠单向灌流技术,对重量法和酚红法计算的净水流量值(NWF)、药物吸收速率常数(Ka)和药物表观吸收系数(Papp)进行比较,并对重量法中收集液在密度修正前后的NWF和Papp值进行比较。
this paper deals with the impacts of forest cutting, tillage and afforestation on hydrological processes in a subtropical region and the following conclusions are reached : 1) forest cutting can increase net precipitation , soil evaporation .
本文利用小集水区实验技术方法探讨了亚热带地区森林采伐和整地造林对水文学过程的影响，文章认为森林采伐增加了系统的净降水量、土壤蒸发、降雨作用于地表的动能及水土流失的可能性；皆伐使系统的蒸发散减小。