A Methodology to Identify the Releasing of the Amide-Containing beta-Glucan from the Usnea Lichen: A Spectroscopic Study

Autor(es)

Fernandes, Rafaella F. ^[1] ; Alves, Gustavo A. S. ^[2] ; Goncalves, Renato V. ^[2] ; Temperini, Marcia L. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Fundamental Chem Dept, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 29, n. 10, p. 3105-3115, OCT 2021.
• Citações Web of Science: 1

Resumo

Polymer fractions from a biological matrix have been well-characterized by vibrational spectroscopy, XPS, CP/MAS C-13 NMR, MALDI-TOF mass spectrometry, thermal analysis, and SEM, and all the results had corroborated for the chemical extraction of beta-glucan polymers grafted amino groups by peptide bonds (namely NH2-beta-glucan) as well as a cyclic oligosaccharide. Our primary purpose was to explore the polysaccharide extraction parameters in the sample of Usnea lichen, mainly in terms of extraction time and concentration of the extractive alkaline solution, to investigate the chemical characterization of the polysaccharide fractions. The low-cost methodology adopted in this work was able to extract the materials of interest with the expected efficiency without the significant impact of chemicals on the environment. The chemical extraction of an NH2-bonded biopolymer can be a very interesting material for many applications since chemical functionalization is crucial to introducing specific properties for developing new materials. In this regard, the cyclic beta-glucan described as a very porous material is highly desirable for various applications in the biomedical, biotechnological, and environmental areas. (AU)

• Processo FAPESP: 18/25422-9 - Preparação de biofilmes a partir de betas glucanas liquênicas: estudo de suas propriedades e identificação dos seus fingerprints vibracionais
• Beneficiário: Rafaella Ferreira Fernandes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/21070-5 - Espectroscopia vibracional com resolução espacial
• Beneficiário: Mauro Carlos Costa Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Temático