Fig. 1.
The number of insoluble fine particles whose particle size varies over time●, 1.3-2μm, ■, 2-5μm, ▲, 5-10μm, ○, 10-25μm, □, 25-50μm, ρ, 50μm or greater, mean±SD, n = 3.
The number of insoluble fine particles whose particle size varies over time●, 1.3-2μm, ■, 2-5μm, ▲, 5-10μm, ○, 10-25μm, □, 25-50μm, ρ, 50μm or greater, mean±SD, n = 3.