| http://www.w3.org/ns/prov#value | - These processes, particularly the Niimi et al process, are understandably difficult to control and of necessity, i.e. inherently, produce spheres varying in size and wall thickness, spheres with walls that have sections or portions of the walls that are relatively thin, walls that have holes, small trapped bubbles, trapped or dissolved gases, any one or more of which will result in a substantial w
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