&lt;i&gt;In Vitro&lt;/i&gt; Antioxidant Activity of Chitosan Aqueous Solution: Effect of Salt Form

Charernsriwilaiwat, Natthan; Opanasopit, Praneet; Rojanarata, Theerasak; Ngawhirunpat, Tanasait

doi:10.4314/tjpr.v11i2.9

Cited by 24 publications

(15 citation statements)

References 30 publications

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“…This fact may be related once again to the formation of strong intermolecular and intramolecular hydrogen bonds that reduced the reactivity of hydroxyl and amino groups in the polymer chains. Other authors [48] proved the influence of hydroxyl and amino groups in the scavenging process, showing lower scavenging values for chitosan-thiamine pyrophosphate (CS-TPP) and chitosan-hydroxybenzotriazole (CS-HOBt) when compared to chitosan-acetate and chitosan-EDTA. According to the author, it might be due to the higher ability of TPP and HOBt to bond with the hydroxyl and amino groups of chitosan, blocking the reaction with the superoxide.…”

Section: Resultsmentioning

confidence: 99%

Antifungal and Antioxidant Properties of Chitosan Polymers Obtained from Nontraditional Polybius henslowii Sources

et al. 2019

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Chitin was extracted from Polybius henslowii, a swimming crab, captured in large quantities throughout the Portuguese coast by purse seine vessels as bycatch. After standard chitin extraction procedures, water-soluble chitosan products were obtained via two different methods: (1) N-acetylation with the addition of acetic anhydride and (2) a reaction with hydrogen peroxide. The chemical structure and molecular weight of chitosan derivatives, water-soluble chitosan (WSC) and chitooligosaccharides (COS), were confirmed by Fourier Transform Infrared Spectroscopy (FT-IR) and gel permeation chromatography (GPC). Antioxidant and metal chelation activities were evaluated, and the growth inhibition capacity was tested on four phytopatogens. The chitooligosaccharides from pereopods (pCOS) and shell body parts (sCOS) inhibited all fungal species tested, particularly Cryphonectria parasitica with 84.7% and 85.5%, respectively. Both radical scavenging and antifungal activities proved to be dose-dependent. Chitooligosaccharides with a low molecular weight (2.7, 7.4, and 10.4 Kg·mol−1) showed the highest activity among all properties tested. These results suggested that chitosan derivatives from P. henslowii raw material could potentially be used against phytopathogens or as ingredient in cosmetics and other products related to oxidative stress.

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Section: Resultsmentioning

confidence: 99%

Antifungal and Antioxidant Properties of Chitosan Polymers Obtained from Nontraditional Polybius henslowii Sources

et al. 2019

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“…Over the past few years, several groups have studied the antioxidant attributes of chitosan derivatives [29][30][31][32]. Generally, the chitosan samples in these studies were produced from crabs, shrimp and fungi.…”

Section: Introductionmentioning

confidence: 99%

Extraction and characterization of chitin and chitosan with antimicrobial and antioxidant activities from cosmopolitan Orthoptera species (Insecta)

Kaya

Baran

Asan-Ozusaglam

et al. 2015

Biotechnol Bioproc E

152

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This study examined two gregarious Orthoptera species (Calliptamus barbarus and Oedaleus decorus) as potential sources of chitin. The chitin content of the dry weight of C. barbarus was 20.5 ± 0.7%, and it was 16.5 ± 0.7% for O. decorus. Furthermore, the yield of chitosan (70 75% deacetylation degree) from the grasshopper species was found to be 74 ~ 76%, which is close to the yield of commercial preparations obtained from the unused parts of crabs and shrimp. The chitin and chitosan obtained in this way were analyzed using FTIR, TGA, XRD and SEM techniques, and the antimicrobial properties of chitosans obtained from C. barbarus and O. decorus against pathogenic microorganisms of humans and fish were investigated using the disc diffusion and microdilution broth methods. The antimicrobial screening procedures indicated that the chitosan showed significant antimicrobial activity against all of the tested pathogenic microorganisms. The MBC or MFC values were determined to be 0.16 ~ 2.50 mg/mL. The IC 50 values for the chitins obtained from C. barbarus and O. decorus were 10.68 ± 0.27 and 10.91 ± 0.96 mg/mL, respectively, which were greater than the value for butylated hydroxytoluene (BHT): 0.04 ± 0.01 mg/mL. These results suggest that these two species, which are currently considered to be pests because of over-breeding, are potentially alternative sources of chitin and chitosan, which are used in the food/feed industry for their antimicrobial and antioxidant properties.

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“…Chitosan has been used in tissue engineering for skin repair and wound healing using regeneration mechanisms [10] . It also has biological activities, including antimicrobial [11] , antioxidant [12] , antitumor [13] , anti-inflammatory [14] , immune stimulatory [15] , and anti-hepatotoxicity [16] properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical synthesis of chitosan submicron particles from the gladius of Todarodes pacificus

Anusha¹,

Fleming²,

Arasu

et al. 2016

Journal of Advanced Research

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<i>In Vitro</i> Antioxidant Activity of Chitosan Aqueous Solution: Effect of Salt Form

Cited by 24 publications

References 30 publications

Antifungal and Antioxidant Properties of Chitosan Polymers Obtained from Nontraditional Polybius henslowii Sources

Antifungal and Antioxidant Properties of Chitosan Polymers Obtained from Nontraditional Polybius henslowii Sources

Extraction and characterization of chitin and chitosan with antimicrobial and antioxidant activities from cosmopolitan Orthoptera species (Insecta)

Mechanochemical synthesis of chitosan submicron particles from the gladius of Todarodes pacificus

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