| http://www.w3.org/ns/prov#value | - Patent US5783110 - Gel mixture oflewis base, dye, solvent and flow control agent - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsThere is provided a composition for the detection of an electrophilic gas, such as chlorodifluoromethane or carbon dioxide, which comprises a Lewis base capable of removing a proton from the gas or reacting ther
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