2 documents found, page 1 of 1
Identifying imprints of externally derived dust and halogens in the sedimentary...
Moreno, J.; Ramos, A. M.; Raposeiro, P. M.; Santos, R. N.; Rodrigues, T.; Naughton, F.; Moreno, F.; Trigo, R. M.; Ibañez-Insa, J.; Ludwig, P.; Shi, X.Iberian lacustrine sediments are a valuable archive to document environmental changes since the last glacial termination, seen as key for anticipating future climate/environmental changes and their far-reaching implica -tions for generations to come. Herein, multi-proxy-based indicators of a mountain lake record from Serra da Estrela were used to reconstruct atmospheric (in)fluxes and associated climatic/enviro...
Alkoxylation of camphene over silica-occluded tungstophosphoric acid
Caiado, M.; Machado, A.; Santos, R. N.; Matos, I.; Fonseca, I. M.; Ramos, A. M.; Vital, J.; Valente, A. A.; Castanheiro, J. E.Silica-occluded tungstophosphoric acid (PW-S-sg) was used as an efficient, environmentally friendly heterogeneous catalyst for the liquid-phase alkoxylation of camphene into their more valuable alkyl isobornyl ether, which is used as perfume and cosmetic products, in the pharmaceutical industry, as well as in the food industry. The alkoxylation of camphene with C-1-C-4 alcohols (methanol, ethanol, 1-propanol, 2...