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<http://webisa.webdatacommons.org/prov/281379518>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/102095370> .
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<http://webisa.webdatacommons.org/102095370>	<http://www.w3.org/ns/prov#value>	"One of the strengths of silicones is their high degree of gas permeability which accounts for their use in applications such as membranes for gas separation. ???However, the permeability can also be detrimental in applications where the molded part needs to provide a barrier to oxygen, air or other gases,??? says Krenceski." .