| http://www.w3.org/ns/prov#value | - This can be accomplished in a very simple manner, whether by thermal (heating to temperatures between 50 and 400??? C., preferably between 100 and 200??? C. or laser irradiation), photolytic (illumination, for example with wavelengths below 375 nm) or chemical (with organic or inorganic acids or bases) treatments of the solids containing the compounds according to the invention or of the solutions
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