Assertion: alizarin's structure | /r/HasProperty | niobium-silica gel layer
Facets:
Source sentences:
text: Thus, the low solubility of the species of niobium in solution together with the filtration step using membranes of 0.22 μm, and the absence of chelating agents in the present study suggests that the Si-O-Nb bond undergoes hydrolysis, but only small amount of niobium goes into the solution, while the leached niobium tends to form complex structures (niobium-silica gel layer), which is retained on the glass surface.