Figure 2.

Optical micrographs of the cells at day 7, showing the cell growth morphology on culture plates without glass granules (blank) and those containing different amounts of granules amended with 0%, 2%, and 5% Zn. The quantity of granules is noted in the bracket. Cell morphologies were similar when cultured in the presence of small quantity of glass granules (x3), while they differed in response to the presence of large quantity of granules (x30), particularly when the granules contained no Zn.