00434naa a2200157 a 450000100080000000500110000800800410001910000200006024500660008026000090014665000100015565000120016570000250017770000200020277300540022213066872011-07-20       2002    bl uuuu     u00u1 u    #d1 aSOUZA, M. F. de  aSilica derived from burned rice hulls.h[electronic resource]  c2002  aArroz  aSílica1 aMAGALHÃES, W. L. E.1 aPERSEGIL, M. C.  tMaterials Researchgv. 5, n. 4, p. 467-474, 2002.