Radical scavenging activity of 5-methylpyrrolidinone chitosan and dibutyryl chitin

Castagnino, Enzo; Ottaviani, M. Francesca; Cangiotti, Michela; Morelli, Mila; Casettari, Luca; Müzzarelli, Riccardo A.A.

doi:10.1016/j.carbpol.2008.04.016

Cited by 36 publications

(21 citation statements)

References 34 publications

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“…The 35%–15 β‐chitosan exhibited slightly lower DPPH radical scavenging activity than 45%–30 β‐chitosan (11.4% vs. 12.2%; Table ). The scavenging activity of chitosan may be attributed to the reaction between free radicals and protonated amino groups (Xie et al ., ; Kim & Thomas, ; Castagnino et al ., ). A decrease in DPPH radical scavenging activity of chitosans with increasing MW or viscosity has been previously reported (Kim & Thomas, ; Cho et al ., ; Youn et al ., ).…”

Section: Resultsmentioning

confidence: 97%

Preparation and characterisation of selected physicochemical and functional properties of β‐chitosans from squid pen

Youn

Prinyawiwatkul

2013

Int J of Food Sci Tech

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Summary Squid pen β‐chitosans prepared under various deacetylation conditions (30%, 35%, 40% and/or 45% NaOH for 15, 30 and/or 60 min) were characterised. β‐Chitosans (deacetylated with 35–45% NaOH for 15–60 min) had 87.1–96.2% degree of deacetylation (DD), 93.5–96.7% solubility and 120.5–654.9 mPa s viscosity. Treatment with 30% NaOH for 15–60 min yielded inadequately deacetylated β‐chitosans (DD = 51.9–80.2%). Two chitosans prepared under 35% NaOH for 15 min and 45% NaOH for 30 min (designated as 35%–15 and 45%–30, respectively) were further compared. Drying (sun‐drying vs. oven‐drying) methods did not affect DD. 35%–15 chitosan exhibited lower nitrogen, DD and bulk density, but higher viscosity compared with 45%–30 chitosan. Higher water‐ and fat‐binding capacity but lower DPPH radical scavenging activity were observed for 35%–15 chitosan compared with 45%–30 chitosan. Compared with 45%–30 chitosan, 35%–15 chitosan exhibited higher antibacterial activity against Salmonella Enteritidis and Listeria monocytogenes, but lower antibacterial activity against Escherichia coli.

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Section: Resultsmentioning

confidence: 97%

Preparation and characterisation of selected physicochemical and functional properties of β‐chitosans from squid pen

Youn

Prinyawiwatkul

2013

Int J of Food Sci Tech

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“…Recently, the antioxidant activity of chitosan and its derivatives have attracted attention because of their nontoxic nature and natural abundance (Castagnino et al, 2008;Feng, Du, Li, Wei, & Yao, 2007). However, few studies on the antioxidant properties of carboxymethyl chitosan prepared from squid cartilage are available.…”

Section: Introductionmentioning

confidence: 99%

Biochemical activities of N,O-carboxymethyl chitosan from squid cartilage

Zhao

Huang

et al. 2011

Carbohydrate Polymers

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“…The scavenging activity of chitosan may be due to the reaction between free radicals and protonated amino groups (Castagnino et al, 2008;Xie, Xu, & Liu, 2001).…”

Section: Dpph Radical Scavenging Activity Of Chitosansmentioning

confidence: 99%

Physicochemical and functional properties of chitosans prepared from shells of crabs harvested in three different years

Youn

Prinyawiwatkul

2009

Carbohydrate Polymers

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Radical scavenging activity of 5-methylpyrrolidinone chitosan and dibutyryl chitin

Cited by 36 publications

References 34 publications

Preparation and characterisation of selected physicochemical and functional properties of β‐chitosans from squid pen

Preparation and characterisation of selected physicochemical and functional properties of β‐chitosans from squid pen

Biochemical activities of N,O-carboxymethyl chitosan from squid cartilage

Physicochemical and functional properties of chitosans prepared from shells of crabs harvested in three different years

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