医用多酶洗涤剂洗涤效果评价方法探讨

目的:采用不同医用多酶洗液的洗涤实验,以确定其洗涤效果评价方法。方法:借助于超声波清洗器,采用多酶底物毛细管法和猪血毛细管法及猪血污布法评价多酶洗液的清洗效果。结果:在毛细管法中,毛细管洁净率最高的是郑酶1号;当采用污布法时,郑酶1号对猪血污布的洁净度高于其它三种。从去污值和去污值提高率看,郑酶1号也明显高于其它几种,分别为302.52%和210.37%,然后依次为3M(161.82%,66.02%),点而康(157.91%,62.01%),万福金安(146.74%,50.55%)。结论:多酶洗液对有机污物有很好的清洗效果,毛细管法和污布法用于评价多酶洗液的洗涤效果有一定的参考价值。

A composite model for complex building street configuration in a large eddy simulation of local urban atmospheric environment

The wind field and pollutant dispersion are predicted numerically in a local urban area with crowded buildings and heavy traffic.A domain decomposition method is used in the large eddy simulation,in which the urban area is decomposed into a central area,where pollution is the major concern,and a surrounding region,where the pollutant distribution is not important.The composite model is proposed for the complex building-street layout.The fine grid mesh is used to resolve the buildings in the central area while the buildings are treated as roughness elements in the surrounding region where the coarse grids are used.The proposed numerical method is applied to simulate the wind field and pollutant dispersion from vehicle exhaust in the Rua Do Campo area of Macao.The results show that the composite model is an appropriate method for predicting wind field and pollutant dispersion in the crowded building area.