Giovanna Regina Gonzalez de Santana Wojnar
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Giovanna Regina Gonzalez de Santana Wojnar has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
- Aiane Nascimento Santana
Department of Exact and Earth Sciences I, UNEB-State University of Bahia, Silveira Martins Street, 2555 Cabula, Salvador 41150-000, Bahia, Brazil
1 shared publication - Andreza Santos De Jesus
Department of Exact and Earth Sciences I, UNEB-State University of Bahia, Silveira Martins Street, 2555 Cabula, Salvador 41150-000, Bahia, Brazil
1 shared publication - Arnaud Victor dos Santos
Department of Exact and Earth Sciences I, UNEB-State University of Bahia, Silveira Martins Street, 2555 Cabula, Salvador 41150-000, Bahia, Brazil
1 shared publication - Helena Carla Magalhães dos Reis
Department of Exact and Earth Sciences I, UNEB-State University of Bahia, Silveira Martins Street, 2555 Cabula, Salvador 41150-000, Bahia, Brazil
1 shared publication - Lourdes Cardoso de Souza Neta
Departamento de Ciências Exatas e da Terra I Universidade do Estado da Bahia Salvador Brazil
1 shared publication - Madson de Godoi Pereira
Department of Exact and Earth Sciences I, UNEB-State University of Bahia, Silveira Martins Street, 2555 Cabula, Salvador 41150-000, Bahia, Brazil
1 shared publication
Latest Publications
- Open Access
Antibacterial Biofilms of Chitosan Incorporated with the Ethanolic Extract of the Stem Bark of Libidibia ferrea and Its Fractions
The high mortality rate from microbial infections underscores the need to discover new antimicrobials. This work produced antibacterial Chitosan biofilms with and without the incorporation of the ethanolic extract of Libidibia ferrea stem bark and its ethyl acetate and aqueous fractions. The extract and fractions were subjected to FTIR and 1H NMR analysis. The biofilms were characterized by FTIR, scanning electron microscopy, thermogravimetry, and differential scanning calorimetry analysis. The 1H NMR and FTIR data, as well as the colorimetric quantification of total phenolics, demonstrated the presence of phenolic compounds. Staphylococcus aureus and Bacillus cereus were the most susceptible bacteria for Chitosan/L. ferrea biofilms and fractions (growth inhibition zones values in the range of 10.8 ± 0.1 to 14.0 ± 0.1 mm, and minimum inhibitory or bactericidal concentration, MIC or MBC values of the fractions were in the range of 125 to 250 µg mL−1. Only the fractions inhibited Pseudomonas aeruginosa (MIC = 250 µg mL−1). Chitosan/L. ferrea biofilms exhibited efficient interactions between chitosan functional groups and secondary metabolites, good thermal stability, and increased rigidity in mechanical tests. This study reinforces the pharmacological potential of biodegradable Chitosan/L. ferrea biofilms as antibacterial agents biofilms.
Open AccessAntibacterial Biofilms of Chitosan Incorporated with the Ethanolic Extract of the Stem Bark of Libidibia ferrea and Its Fractions
The high mortality rate from microbial infections underscores the need to discover new antimicrobials. This work produced antibacterial Chitosan biofilms with and without the incorporation of the ethanolic extract of Libidibia ferrea stem bark and its ethyl acetate and aqueous fractions. The extract and fractions were subjected to FTIR and 1H NMR analysis. The biofilms were characterized by FTIR, scanning electron microscopy, thermogravimetry, and differential scanning calorimetry analysis. The 1H NMR and FTIR data, as well as the colorimetric quantification of total phenolics, demonstrated the presence of phenolic compounds. Staphylococcus aureus and Bacillus cereus were the most susceptible bacteria for Chitosan/L. ferrea biofilms and fractions (growth inhibition zones values in the range of 10.8 ± 0.1 to 14.0 ± 0.1 mm, and minimum inhibitory or bactericidal concentration, MIC or MBC values of the fractions were in the range of 125 to 250 µg mL−1. Only the fractions inhibited Pseudomonas aeruginosa (MIC = 250 µg mL−1). Chitosan/L. ferrea biofilms exhibited efficient interactions between chitosan functional groups and secondary metabolites, good thermal stability, and increased rigidity in mechanical tests. This study reinforces the pharmacological potential of biodegradable Chitosan/L. ferrea biofilms as antibacterial agents biofilms.