porphyrins that are bound into a macromolecular network, as observed for example in asphaltenes39,43,44. Notably, the typical XANES spectra of covalently bound tetrapyrrole complexes are conserved in coking residues of bitumen that have been heated to temperatures as high as 480 to 565°C43, ...
based on a global and coherent interpretation of the original physiognomy of a landscape that has been decisively shaped by volcanic phenomena. This nature trail represents a proposal for a new tourism product as an alternative to the traditional “sun and beach” coastal tourism product. This pape...