Summary iq.unesp.br/ecletica | Vol. 46 | n. 1 | 2021 | SUMMARY EDITORIAL BOARD ............................................................................................................................................. 3 EDITORIAL ......................................................................................................................................................... 4 DATABASE ......................................................................................................................................................... 5 INSTRUCTIONS FOR AUTHORS ......................................................................................................................... 6 ORIGINAL ARTICLES Zinc fractionation in cow, goat, sheep and soybean milk samples using gel-electrophoresis and determination by electrothermal atomic absorption spectrometry (ETAAS) ................................................. 12 Carla Maíra Bossu, Rodrigo Giglioti, Marcia Cristina de Sena Oliveira, Pedro Vitoriano de Oliveira, Ana Rita de Araujo Nogueira Impact of salinity on the kinetics of CO2 fixation by Spirulina platensis cultivated in semi-continuous photobioreactors ............................................................................................................................................ 21 Javier Christian Ramirez-Perez, Harry Janes Chemical profiles and antimicrobial activities of plants utilized in Brazilian traditional medicine ............ 35 Clécio Souza Ramos, Rafaela Souza Silva, Marcílio Wagner Fontes da Silva, Giselle Barbosa Bezerra Analytical procedures for the determination of estrogen compounds in a surface water reservoir in Southeast Brazil .................................................................................................................................................... 41 Thayná Aparecida Cais, Alley Michael da Silva Procópio, Márcia Matiko Kondo, Flávio Soares Silva, Sandro José de Andrade Comparison between two Polyethersulfone concentrations in hollow fiber ultrafiltration membranes. Is it worth to use more polymer? ............................................................................................................................... 52 Karen Gonzaga, Jose Carlos Mierzwa http://revista.iq.unesp.br/ojs/index.php/ecletica/index