Now showing items 21-30 of 12686
Mechanical properties of acid sodium caseinate-K-carrageenan gels: effect of co-solute addition
(Elsevier Sci LtdOxfordInglaterra, 2004)
Effect of fluoride gels supplemented with sodium trimetaphosphate in reducing demineralization
The objective of this study was to evaluate the in vitro effect of low-fluoride (F) gels supplemented with sodium trimetaphosphate (TMP) on enamel demineralization.Bovine enamel blocks (n = 160) were selected based on ...
Textured macro- and mesoporous alumina samples designed in the presence of different surfactant types
This work presents a method that enables the synthesis of porous alumina in the presence of different types of surfactant. The method is based on a sol-gel transition, using surfactants and droplets of a nonpolar phase as ...
O processo sol-gel: uma visão físico-química
(Soc Brasileira Quimica, 1995-03-01)
The aim of this work was to revise the main concepts involved in the physical-chemistry of the sol-gel process. First, the preparation and its influence on the gel's structure are focalized; the sol-gel transition is revised ...
Formation of SnO2 gels from dispersed sols in aqueous colloidal solutions
Transparent SnO2 gels were obtained from SnCl4 aqueous solution. The sol formation from tin oxihydroxy peptization in different concentrations and by electrolyte addition in solution was measured. It was verified that the ...
Changes in protein fractions, trypsin inhibitor and proteolytic activity in the cotyledons of germinating chickpea
The chickpea seed germination was carried out in 6 days. During the period it was observed a little variation on total nitrogen contents, however the non protein nitrogen was double. A decrease of 19.1 and 20.6% in relation ...