Characterization, Antimicrobial Properties and Coatings Application of Gellan Gum Oxidized with Hydrogen Peroxide

Lu, Yushuang; Zhao, Xin; Fang, Sheng

doi:10.3390/foods8010031

Cited by 50 publications

(22 citation statements)

References 34 publications

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“…Concerning gellan gum, less information is available on its possible antimicrobial activity. Recently it was reported MIC data of oxidized GG in the range 0.5%–4% (w/v) against E. coli and S. aureus where the antimicrobial activity would be explained by the presence of carboxyl groups in the oxidized polymer (Lu et al., 2019).…”

Section: Resultsmentioning

confidence: 99%

“…For instance, Martin-Visscher et al 2011 data of oxidized GG in the range 0.5%-4% (w/v) against E. coli and S. aureus where the antimicrobial activity would be explained by the presence of carboxyl groups in the oxidized polymer (Lu et al, 2019). Figure 2 shows the results concerning the growth of the tested bacteria in both model fish media, Medium M1 containing trout, and…”

Section: Antimicrobial Activitymentioning

confidence: 96%

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Films based on Pectin, Gellan, EDTA, and bacteriocin‐like compounds produced by Streptococcus infantarius for the bacterial control in fish packaging

Pérez-Arauz

Rodríguez-Hernández

López-Cuellar

et al. 2020

J Food Process Preserv

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A fish‐packaging film was prepared with 0.4% gellan gum (GG), 2% citrus pectin (CP), 0.75% glycerol, EDTA 1 mM, and 50 arbitrary‐units (AU)/ml of antimicrobial‐activity supernatants (AS) from Streptococcus infantarius cultures containing bacteriocin‐like compounds of 5–10 kDa. The formulation was based on a minimum inhibitory condition (AS, 50 AU/ml; EDTA, 1 mM; CP, 0.1%; GG, 0.05%) for 105 CFU/well of Escherichia coli, Staphylococcus aureus or Listeria monocytogenes growing in BHI at 35°C, 24 hr. The films entirely inhibited the growth of the three bacteria in two model fish media, containing trout or tilapia, at two incubation‐conditions: 9°C, 90% RH, 30‐day; and 35°C, 35% RH, 7‐day. Furthermore, wrapped fresh‐fillets of trout or tilapia exhibited the lowest total‐aerobes counts, 8 × 106–1 × 107 CFU/g, after 7‐day‐incubation at accelerated conditions (25 ± 2°C, 60 ± 10% RH), showing the film‐potential. The film‐physical‐mechanical properties (Young’s modulus; elongation and stress at break; oxygen and water vapor permeability) were slightly affected by the EDTA‐AS contents. Practical applications Development of a biodegradable‐film based on citrus pectin, and gellan gum, enriched with EDTA and antimicrobial substances produced by Streptococcus infantarius, for hindering the growth of pathogen bacteria (i.e., Escherichia coli, Staphylococcus aureus, and Listeria monocytogenes) and total aerobes that would contaminate and/or deteriorate fresh fish, like trout and tilapia.

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Section: Resultsmentioning

confidence: 99%

Section: Antimicrobial Activitymentioning

confidence: 96%

Films based on Pectin, Gellan, EDTA, and bacteriocin‐like compounds produced by Streptococcus infantarius for the bacterial control in fish packaging

Pérez-Arauz

Rodríguez-Hernández

López-Cuellar

et al. 2020

J Food Process Preserv

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“…The spectrum of GLL ( Figure 9 a) contains characteristic peaks of the tetrasaccharide repeating units as follows: -CH of glycosidic bonds in sugar at δ = 5.83 ppm; -CH of rhamnose at δ = 5.15 ppm; -CH of glucose and glucuronic acid at δ = 3.36–4.61 ppm; -CH 3 of rhamnose at δ = 1.29–1.31 ppm [ 42 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

New Grafted Copolymers Carrying Betaine Units Based on Gellan and N-Vinylimidazole as Precursors for Design of Drug Delivery Systems

Racoviţă¹,

Baranov

Macsim³

et al. 2020

Molecules

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New grafted copolymers possessing structural units of 1-vinyl-3-(1-carboxymethyl) imidazolium betaine were obtained by graft copolymerization of N-vinylimidazole onto gellan gum followed by the polymer-analogous reactions on grafted polymer with the highest grafting percentage using sodium chloroacetate as the betainization agent. The grafted copolymers were prepared using ammonium persulfate/N,N,N′,N′ tetramethylethylenediamine in a nitrogen atmosphere. The grafting reaction conditions were optimized by changing one of the following reaction parameters: initiator concentration, monomer concentration, polymer concentration, reaction time or temperature, while the other parameters remained constant. The highest grafting yield was obtained under the following reaction conditions: ci = 0.08 mol/L, cm = 0.8 mol/L, cp = 8 g/L, tr = 4 h and T = 50 °C. The kinetics of the graft copolymerization of N-vinylimidazole onto gellan was discussed and a suitable reaction mechanism was proposed. The evidence of the grafting reaction was confirmed through FTIR spectroscopy, X-ray diffraction, 1H-NMR spectroscopy and scanning electron microscopy. The grafted copolymer with betaine structure was obtained by a nucleophilic substitution reaction where the betainization agent was sodium chloroacetate. Preliminary results prove the ability of the grafted copolymers to bind amphoteric drugs (cefotaxime) and, therefore, the possibility of developing the new sustained drug release systems.

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“…The FTIR spectra give important qualitative and quantitative information about the structure of the microparticles by identification of the chemical functional groups in the samples. The FTIR spectra of gellan and copolymers based on GMA and dimethacrylic monomers are well known in the literature . In Fig.…”

Section: Resultsmentioning

confidence: 99%

Porous microparticles based on methacrylic copolymers and gellan as drug delivery systems

Vasiliu¹,

Lungan²,

Racoviţă³

et al. 2019

Polymer International

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Two types of porous microparticles based on glycidyl methacrylate, dimethacrylic monomers (ethylene glycol dimethacrylate, diethylene glycol dimethacrylate and triethylene glycol dimethacrylate) and gellan were prepared by two methods. The first method was aqueous suspension polymerization in the presence of N-butyl acetate as porogenic agent when the crosslinking and grafting reactions were achieved in a single step. The second method was based on the reaction between hydroxyl groups belonging to gellan and the epoxy groups situated on the surface of porous microparticles based on glycidyl methacrylate and dimethacrylic monomers in basic medium. The microparticles with and without gellan were characterized by Fourier transform infrared spectroscopy, SEM, AFM and TGA. Also, the porous structure was investigated in terms of pore volume, porosity and specific surface. The swelling behaviour in aqueous solution with different pH values as well as sorption studies of cefuroxime sodium salt onto porous microparticles were investigated. The presence of gellan in the structure of the microparticles leads to porous materials characterized by higher specific surface areas (S sp = 78-140 m 2 g-1), higher swelling capacities (S w = 162%-365%) and higher sorption capacities of the drug (q e = 101-147 mg g-1) compared to microparticles without gellan in their structures (S sp = 73-85 m 2 g-1 ; S w = 139%-209%; q e = 70-110 mg g-1).

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Characterization, Antimicrobial Properties and Coatings Application of Gellan Gum Oxidized with Hydrogen Peroxide

Cited by 50 publications

References 34 publications

Films based on Pectin, Gellan, EDTA, and bacteriocin‐like compounds produced by Streptococcus infantarius for the bacterial control in fish packaging

Films based on Pectin, Gellan, EDTA, and bacteriocin‐like compounds produced by Streptococcus infantarius for the bacterial control in fish packaging

New Grafted Copolymers Carrying Betaine Units Based on Gellan and N-Vinylimidazole as Precursors for Design of Drug Delivery Systems

Porous microparticles based on methacrylic copolymers and gellan as drug delivery systems

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