Utilization of Smartphone Light Sensors as Light Transmission Analyzer During the Obtaining of Polymeric Phase Inversion Membranes - PINTILIE, Ștefan; PINTILIE, Geanina Laurenția; BALTĂ, Ștefan (The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2020)