2 documents found, page 1 of 1
Corrosion Protection of Steel by Volatile Corrosion Inhibitors: Vapor Analysis ...
Valente Jr.,Marco A. G.; Gonçalves,Luís M.; Passaretti Filho,Juliano; Cardoso,Arnaldo A.; Rodrigues,José A.; Fugivara,Cecilio S.; Benedetti,Assis V.A new methodology using gas-diffusion microextraction (GDME) was developed for the analysis of volatile corrosion inhibitors (VCIs). The evaluation of the inhibition efficiency and corrosion rate (ν) was performed by NaCl deliquescence tests and correlated with measurements of polarization resistance (Rp) obtained from electrochemical impedance spectroscopy (EIS) analysis and with the pH resulting from the atmo...
Pyranoflavylium derivatives extracted from wine grape as photosensitizers in so...
Santos,Christiane M.; Gomes,Bárbara; Gonçalves,Luís M.; Oliveira,Joana; Rocha,Sandra; Coelho,Manuel; Rodrigues,José A.; Freitas,Victor; Aguilar,HelenaPyranoflavylium derivatives, namely cyanidin-3-glucoside, malvidin 3-O-glucoside, malvidin 3-O-coumaroylglucoside, cyanidin 3-glucoside-pyruvic acid adduct and malvidin 3-glucoside-pyruvic acid adduct, extracted from red grapes were used as sensitizers in dye-sensitized solar cells (DSSCs). With these natural dyes, cell's efficiencies ranged up to 0.08%. The cyanidin based dyes were more efficient as sensitizer...