Antimicrobial analysis of films processed from chitosan and N,N,N-trimethylchitosan

Goy, Rejane Celi; Assis, O. B. G.

doi:10.1590/0104-6632.20140313s00003014

Cited by 24 publications

(9 citation statements)

References 33 publications

(32 reference statements)

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“…Since these samples were neutralised before testing for antibacterial, the presented low values may well be related to incorporated tannic acid, compared to acetic acid which is reported to have higher antibacterial effect for these bacteria even at lower concentrations [55,56]. Even though chitosan has been reported to have antibacterial effect [57], the values found in this work for samples containing cellulose with chitosan had a weak antibacterial activity. When they were incorporated with tannic acid, the antibacterial effect is still lower than when compared to samples without chitosan.…”

Section: Antibacterial Activitymentioning

confidence: 62%

Microfibrillated cellulose films containing chitosan and tannic acid for wound healing applications

Aliabadi

Chee

Matos

et al. 2021

J Mater Sci: Mater Med

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The effectiveness of tannic acid as antimicrobial and wound healing for burns have been shown for a century; however, uncontrolled target dosage may result in undesirable side-effects. Remarkably, tannic acid polyphenols compounds crosslinked with polymeric materials produce a strong composite containing the beneficial properties of this tannin. However, investigation of the crosslink structure and its antibacterial and regenerative properties are still unknown when using nanocellulose by mechanical defibrillation; additionally, due to the potential crosslink structure with chitosan, its structure can be complex. Therefore, this work uses bleach kraft nanocellulose in order to investigate the effect on the physical and regenerative properties when incorporated with chitosan and tannic acid. This film results in increased rigidity with a lamellar structure when incorporated with tannic acid due to its strong hydrogen bonding. The release of tannic acid varied depending on the structure it was synthesised with, whereas with chitosan it presented good release model compared to pure cellulose. In addition, exhibiting similar thermal stability as pure cellulose films with antibacterial properties tested against S. aureus and E. coli with good metabolic cellular viability while also inhibiting NF-κB activity, a characteristic of tannic acid.

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Section: Antibacterial Activitymentioning

confidence: 62%

Microfibrillated cellulose films containing chitosan and tannic acid for wound healing applications

Aliabadi

Chee

Matos

et al. 2021

J Mater Sci: Mater Med

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“…Moreover, all antibacterial activities of low MM chitosan with the DDA of 90.58% were higher than that of high MM with the DDA of 52.14%. A previous study showed that the DDA as well as MM greatly affected the antibacterial activity, and chitosan with higher DDA values showed better antimicrobial activity (Goy & Assis, ).…”

Section: Resultsmentioning

confidence: 99%

Microwave‐assisted degradation of chitosan with hydrogen peroxide treatment using Box‐Behnken design for enhanced antibacterial activity

Zhang

Chen

et al. 2017

Int J of Food Sci Tech

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SummaryLow molecular mass (MM) chitosan with high degree of deacetylation (DDA) has excellent bioactivity including antioxidant, antibacterial and encapsulation properties. In this work, to reduce the MM of chitosan, microwave-assisted heating treatment (MAHT) conditions were investigated using three factors at three levels Box-Behnken design (BBD). Microwave heating (MH) time, H 2 O 2 concentration and solid-toliquid ratio significantly affected the DDA and MM of chitosan. The antibacterial activities of chitosan before and after degradation were investigated based on minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The results showed that a second-order polynomial equation fitted the observed values using multiple regression analysis and had a high coefficient of determination (R 2 = 0.9591 and 0.9161 for the DDA and MM of chitosan, respectively). An optimisation study was performed using Derringer's desirability function methodology, and the optimal conditions were 80-s MH time, 1.5% H 2 O 2 concentration and 1:40 solid-to-liquid ratio. The MIC and MBC of chitosan before and after degradation against Escherichia coli and Salmonella typhimurium were 0.031 and 0.063 mg mL À1 , and 0.25 and 0.125 mg mL À1 , respectively. The optimised DDA and MM of chitosan were 90.58 AE 2.04% and 124.25 AE 14.36 kDa, respectively, which significantly reduces the use of oxidant reagent.

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“…There are some hypotheses about the antimicrobial mechanism of chitosan. The ionic interactions between positive charges of amino groups and negative bacteria surface molecules in acid conditions alter the membrane permeability leading to cellular lysis [ 40 , 47 ]. Another mechanism could be the interaction with essential nutrients for bacteria [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial effect of insect chitosan on Salmonella Typhimurium, Escherichia coli O157:H7 and Listeria monocytogenes survival

et al. 2020

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The antimicrobial capability of chitosan from Tenebrio molitor as compared with chitosan from crustacean (Penaeus monodon) on different pathogenic microorganisms of concern in food safety was studied. The antimicrobial effect was tested at pH 5 and pH 6.2 and at two different initial concentrations (103 or 106 CFU/mL). Results indicated that chitosan from both sources have antimicrobial activity, although the effect depended on the microorganism considered (Salmonella Typhimurium, Listeria monocytogenes and Escherichia coli O157:H7). Our results indicated that Salmonella was the most resistant bacteria, and that chitosan from insect was less active than chitosan from crustacean, especially against Salmonella. Another important factor on antimicrobial activity was the pH of the sample. When chitosan was added to a solution with a pH of 6.2 it was more active against Listeria and Escherichia coli, than at pH 5.00. Besides, the effect of chitosan appears to decrease with the incubation time, since some increases in counts were observed on E. coli and Salmonella after the 24 and 49 hours of incubation.

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Antimicrobial analysis of films processed from chitosan and N,N,N-trimethylchitosan

Cited by 24 publications

References 33 publications

Microfibrillated cellulose films containing chitosan and tannic acid for wound healing applications

Microfibrillated cellulose films containing chitosan and tannic acid for wound healing applications

Microwave‐assisted degradation of chitosan with hydrogen peroxide treatment using Box‐Behnken design for enhanced antibacterial activity

Antimicrobial effect of insect chitosan on Salmonella Typhimurium, Escherichia coli O157:H7 and Listeria monocytogenes survival

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