silica content
2.ACM/EPDM mass ratio,silica content and cure condition were studied,the results showed that the mechanical properties,wear resistance,thermal properties and oil resistance of the blend were good when EPDM/ACM mass ratio was 25/75 under curing condition 160℃×10MPa×30min,and the filler is silica without carbon black. The integral properties of the ACM/EPDM blend had advantages over ACM or EPDM.
9.with five sorts of common tea from market as comparison, with the color atlas of thin layer split the various biology of Baimao ea Piao Ling soda, with Yi acid Yi ester: Third ketone: Ammonia water = 4: 3: 1( V: V ) to flow appearance, silica gel G is stationary phase, spread out to soak take after, survey its composition content with the ultraviolet photometry of beam splitter in the place of 273 nm.
10.Jute dust(silica 9. 32%,4.4%,0. 98% respectively)were injected intratracheally for total dose of 80mg into 3 groups of Wistar rat.Pathomorphological examination and measurement of collagen content in the lung were made at 1,3,6,12 month after the injection,In the early stage,a pulmonary macrophage response and interstitial pneumonitis were observed.
