Side-stream lignins: Potential antioxidant and antimicrobial agents in milk.

Autor: Marangon CA; Embrapa Instrumentation, Nanotechnology National Laboratory for Agriculture (LNNA), Rua XV de Novembro, 1452, São Carlos, SP 13560-979, Brazil., Otoni CG; Federal University of São Carlos (UFSCar), Graduate Program in Materials Science and Engineering (PPGCEM) & Department of Materials Engineering (DEMa), Rod. Washington Luis, 235, São Carlos, SP 13565-905, Brazil., Bertuso PC; University of São Paulo (USP), Interunit Graduate Program in Bioengineering (EESC/FMRP/IQSC), Av. Trabalhador São Carlense, 400, CP-780, São Carlos, SP 13566-590, Brazil., Rossi PF; Embrapa Instrumentation, Nanotechnology National Laboratory for Agriculture (LNNA), Rua XV de Novembro, 1452, São Carlos, SP 13560-979, Brazil; Federal University of Minas Gerais (UFMG), Department of Metallurgical, Materials and Mining Engineering, Av. Antônio Carlos, 6627, Pampulha - Belo Horizonte, MG 31270-901, Brazil., Dos Santos DM; Embrapa Instrumentation, Nanotechnology National Laboratory for Agriculture (LNNA), Rua XV de Novembro, 1452, São Carlos, SP 13560-979, Brazil., Lourençon TV; Aalto University, Department of Bioprocesses and Bioproducts, P.O. Box 16300, Aalto, Finland., Martins VCA; University of São Paulo (USP), São Carlos Institute of Chemistry (IQSC), Av. Trabalhador São Carlense, 400, CP-780, São Carlos, SP 13560-970, Brazil., Plepis AMG; University of São Paulo (USP), Interunit Graduate Program in Bioengineering (EESC/FMRP/IQSC), Av. Trabalhador São Carlense, 400, CP-780, São Carlos, SP 13566-590, Brazil; University of São Paulo (USP), São Carlos Institute of Chemistry (IQSC), Av. Trabalhador São Carlense, 400, CP-780, São Carlos, SP 13560-970, Brazil., Mattoso LHC; Embrapa Instrumentation, Nanotechnology National Laboratory for Agriculture (LNNA), Rua XV de Novembro, 1452, São Carlos, SP 13560-979, Brazil., Nitschke M; University of São Paulo (USP), Interunit Graduate Program in Bioengineering (EESC/FMRP/IQSC), Av. Trabalhador São Carlense, 400, CP-780, São Carlos, SP 13566-590, Brazil; University of São Paulo (USP), São Carlos Institute of Chemistry (IQSC), Av. Trabalhador São Carlense, 400, CP-780, São Carlos, SP 13560-970, Brazil. Electronic address: nitschke@iqsc.usp.br.
Jazyk: angličtina
Zdroj: Food research international (Ottawa, Ont.) [Food Res Int] 2024 Mar; Vol. 180, pp. 114091. Date of Electronic Publication: 2024 Feb 01.
DOI: 10.1016/j.foodres.2024.114091
Abstrakt: In recent years, lignin has drawn increasing attention due to its intrinsic antibacterial and antioxidant activities, biodegradability, and biocompatibility. Yet, like several other biogenic structures, its compositional heterogeneity represents a challenge to overcome. In addition, there are few studies regarding food applications of lignin. Herein, we evaluate the antimicrobial and antioxidant effects of lignin from two different sources. These lignins were characterized by attenuated total reflectance Fourier-transform infrared (ATR-FTIR) and hydrogen nuclear magnetic resonance ( 1 H NMR) spectroscopies. Their antibacterial and antioxidant capacities (DPPH and Folin-Ciocalteu methods) were also investigated. Susceptibility tests were performed with the minimal inhibitory (MIC) and bactericidal (MBC) concentrations using the micro-broth dilution technique. Kraft lignin presented higher radical-scavenging and antibacterial activities than alkali lignin, indicating the dependence of antioxidant and antibacterial activities on the precursor biomass. Scanning electron microscopy shows morphologic changes in the bacteria after exposure to lignin, while confocal microscopy suggests that kraft lignin has affinity towards bacterial surfaces and the ability to cause cell membrane destabilization. Lignin inhibited the growth of Staphylococcus aureus and Salmonella Enteritidis in skimmed milk, herein taken as food model. Our results suggest that lignins are promising candidates for green additives to improve quality and safety within the food chain.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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