Diffusion: Pretty Great particles measuring underneath 0.one micron get bounced about randomly and so are slowed by their interactions with atmospheric atoms and molecules. They inevitably drift or get bounced into a filter fiber, whereupon (all over again) they adhere in a system known as diffusion. ฝุ่นละออง, เชื้อรา, ละอองเกสร และแบคทีเรีย waiting for link from Social Network Posts (38)