Summary revista.iq.unesp.br | Vol. 48 | n. 4 | 2023 | SUMMARY EDITORIAL BOARD .............................................................................................. 2 EDITORIAL ........................................................................................................... 4 DATABASE ........................................................................................................... 5 INSTRUCTIONS FOR AUTHORS .......................................................................... 6 REVIEW ARTICLES Is the use of the Problem-Based Learning Model through Instagram effective? A Review ............................................................................................................................................. 17 Hayuni Retno Widarti, Allykha Baharsyah, Deni Ainur Rokhim, Afis Baghiz Syafrudin ORIGINAL ARTICLES Variation in the chemical composition of essential oils from Mangifera indica L. leaves by comprehensive two-dimensional gas chromatography ....................................................... 27 Claudia Andrea Lima Cardoso, Elina Bastos Caramão, Thiago Luis Aguayo de Castro, Euclesio Simionatto Multivariate statistical analysis of physicochemical parameters of groundwater quality using PCA and HCA techniques ................................................................................................... 37 Antonio José Ferreira Gadelha, Clarice Oliveira da Rocha, José Germano Veras Neto, Mirelly Alexandre Gomes Scientific recreations to favor the learning of the periodic table in high school students with incomplete schooling ........................................................................................................... 48 Havdih Castro Valdiviezo, Mario Adelfo Batista Zaldívar https://revista.iq.unesp.br/index.php/ecletica