Insect residues as an alternative and promising source for the extraction of chitin and chitosan.

Autor: Machado SSN; Graduate Program in Food Science, Faculty of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil., Silva JBAD; Center for Exact and Technological Sciences, Faculty of Mechanical Engineering, Federal University of Recôncavo da Bahia, Cruz das Almas, BA, Brazil; Graduate Program in Chemical Engineering, Polytechnic School, Federal University of Bahia, Salvador, BA, Brazil., Nascimento RQ; Doctoral Program in Biotechnology - Northeast Biotechnology Network (RENORBIO), Federal University of Bahia, Salvador, BA, Brazil., Lemos PVF; Doctoral Program in Biotechnology - Northeast Biotechnology Network (RENORBIO), Federal University of Bahia, Salvador, BA, Brazil., Assis DJ; Center for Exact and Technological Sciences, Faculty of Mechanical Engineering, Federal University of Recôncavo da Bahia, Cruz das Almas, BA, Brazil; School of Exact and Technological Sciences, Salvador University, Salvador, BA, Brazil., Marcelino HR; College of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil., Ferreira ES; Graduate Program in Food Science, Faculty of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil; College of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil., Cardoso LG; Graduate Program in Chemical Engineering, Polytechnic School, Federal University of Bahia, Salvador, BA, Brazil; School of Exact and Technological Sciences, Salvador University, Salvador, BA, Brazil., Pereira JD; Graduate Program in Chemical Engineering, Polytechnic School, Federal University of Bahia, Salvador, BA, Brazil., Santana JS; College of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil., Silva MLAD; Chemistry Institute, Federal University of Bahia, Salvador, BA, Brazil., Souza CO; Graduate Program in Food Science, Faculty of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil; Doctoral Program in Biotechnology - Northeast Biotechnology Network (RENORBIO), Federal University of Bahia, Salvador, BA, Brazil; College of Pharmacy, Federal University of Bahia, Salvador, BA, Brazil. Electronic address: carolods@ufba.br.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Jan; Vol. 254 (Pt 3), pp. 127773. Date of Electronic Publication: 2023 Nov 03.
DOI: 10.1016/j.ijbiomac.2023.127773
Abstrakt: This work aimed to obtain and characterize chitin and chitosan extracted from the rearing residues of Tenebrio molitor, Zophobas morio, and Blaptica dubia insects in different growth stages in the same rearing cycles chitin and chitosan yielded 11.21 %-20.89 % and 6.26 %-7.07 %, respectively. The deacetylation degrees of chitosan ranged from 75.75 %-89.21 %, and the solubilities from 69.88 %-94.39 %. Infrared spectroscopy corroborated the acquisition of chitin and chitosan and can be used as a semi-quantitative technique for determining the degree of chitosan deacetylation. The X-ray diffraction profiles revealed the presence of α-chitin, and the relative crystalline indices ranged from 65.9 %-89.2 %. Typical TG profiles with two thermal events are observed for chitin and chitosan samples with different residue contents from the extraction procedure. The chitosan solutions exhibited pseudoplastic behavior, with apparent viscosities ranging from 195.96 to 249.86 mPa.s. The characterization results of the biopolymers extracted from insect residues were similar to those obtained from conventional sources. The growth stage influenced the chitin yield and crystallinity index. The results of this study reinforce the feasibility of using alternative sources of chitin and chitosan, providing the use of waste from insect farms and contributing to sustainability and a circular economy.
Competing Interests: Declaration of competing interest The authors declare that they have n o known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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