00875naa a2200205 a 450000100080000000500110000800800410001910000200006024500820008026000090016252002110017165000110038265000090039365300080040265300340041070000140044470000230045870000200048177301680050110290302005-08-26       2001    bl ---       0--  u    #d1 aFERREIRA, J. A.  aAtomic force microscopy (AFM) characterization of a tropical soil humic acid.  c2001  aAFM was used to image humic acid (HA) deposited from aqueous solution on to the basal-plane surfaces of freshly cleaved mica. Humic substances (HS) are the major organic components of soil organic matter...  aAcidez  aSolo  aAFM  aMicroscopia de força atomica1 aOSIRO, D.1 aHERRMANN, P. S. P.1 aMARTIN-NETO, L.  tActa Microscopica, Maracaibogv. 10, p. 43-47, 2001. Supplement 1. Proceedings of the First Latin American Symposium on Scanning Microscopy, São Pedro, Apr. 2001.