| http://www.w3.org/ns/prov#value | - Should it be desirable to utilize gases other than carbon dioxide to form the foam that forms the stable hydrogel composition described herein, inert gases such as nitrogen or argon, or other gases may be directly introduced into the alginate composition described in the claims herein as long as the alginate compositions described have a viscosity greater than the buoyancy of the gases entrapped t
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