(a)
(b)
Figure 3: General bubble distribution analysis of fresh foams obtained using NAGU. (a) Microscopic analysis of fresh foam from the CS/WPI/SiO2 recipe and (b) bubble size distribution of fresh foam from the CS/WPI/SiO2 recipe. The same distribution profiles were detected for all recipes (i.e., CS/WPI, CS/WPI/HAp, and CS/WPI/SiO2/HAp) used (data not shown).