Effect of abiotic factors on the antibacterial activity of chitosan against waterborne pathogens

Chung, Ying‐Chien; Wang, Huey-Lan; Chen, Yen-Meng; Li, Songlin

doi:10.1016/s0960-8524(03)00002-6

Cited by 273 publications

(127 citation statements)

References 15 publications

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“…In this study, A. hydrophila and S. aureus were found to be less susceptible to chitosan at pH 8.0, with a population reduction of 0.57-1.00 log cfu/mL, respectively. These results are slightly different from those reported by Chung et al, (2003), who found that the inhibition percentage of chitosan solution decreased with increasing of pH but dropped dramatically when the pH was higher than 6.0.…”

Section: Effect Of Ph On the Antibacterial Activity Of Chitosancontrasting

confidence: 99%

Factors influencing antibacterial activity of chitosan against Aeromonas hydrophila and Staphylococcus aureus

et al. 2016

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In this study, the effect of the incubation time, incubation temperature, pH, metal and sodium ions on the antibacterial activity of chitosan against food borne spoilage bacteria focused. Aeromonas hydrophila and Staphylococcus aureus were used as two food borne bacteria. Acetic acid was used dissolving of chitosan. Results showed that chitosan solution at 5 mg/mL significantly inhibited the growth of A. hydrophila and S. aureus in presence of time, pH and metal ions (p <0.01). However, temperature did not significantly affect the antibacterial activity (4°C, 25°C and 37°C) (p >0.01). Chitosan activity increased with increasing incubation time. The influence of below pH 6 on the antibacterial activity of chitosan was significantly influenced (p<0.01). The addition of Ba+2 reduced chitosan activity against A. hydrophila while the addition of Ca+2 have increased chitosan activity against S. aureus. Sodium ions at a concentration of 25 mM reduced chitosan activity against S. aureus. These results show that chitosan can be used food industry to prevent the development of spoilage bacteria. Erdem et al., International Current Pharmaceutical Journal, April 2016, 5(5): 45-48

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Section: Effect Of Ph On the Antibacterial Activity Of Chitosancontrasting

confidence: 99%

Factors influencing antibacterial activity of chitosan against Aeromonas hydrophila and Staphylococcus aureus

et al. 2016

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“…Due to these attributes, it has broad ranges of present and potential applications including biotechnology, drug delivery, cosmetics, agriculture, food science, textiles, etc. (Li et al 1992;Remunan-Lopez and Bodmeier 1997;Okamoto et al 2002;Cheng et al 2003;Chung et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Low Molecular Weight Chitosan

Yuan¹,

Jiang²,

Xing³

et al. 2015

BioResources

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Chitosan can be widely used in many areas owing to its unique properties, although its poor solubility in water is still a limiting factor. In the present study, low molecular weight chitosan (LMWC) was prepared by degradation with NaClO so that chitosan was able to dissolve in water. Chitosan to liquor ratio, NaClO content, temperature, and time were considered variables of NaClO degradation, and the Box-Behnken design was used to determine optimal conditions. There was good agreement between the experimental data and their predicted counterparts. The optimum conditions for chitosan degradation were estimated to be 1:67.91 of chitosan to liquor ratio, 22.03% of NaClO content, a temperature of 90.3 °C, and a time of 3.07 h. It was found that synthesis under these optimized conditions achieved the lowest molecular weight (10,937.4 Daltons). In addition, Fourier transform infrared spectroscopy, X-ray diffractograms, and thermogravimetric analysis showed that the structure of LMWC was similar to the original chitosan, while the crystallinity and thermal stability decreased after degradation.

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“…They observed that chitosan with high molecular weight showed strong antimicrobial activity against Gram positive bacteria, whereas chitosans of 11 kDa and 20-30 kDa molecular weight were most effective against Gram negative bacteria. Chung et al (2003) recently reported that the antibacterial activity of chitosan against Escherichia coli and S. aureus increased with ionic force and at a pH less than 6.0, but decreased with the addition of metal ion. Additionally, they observed that the antibacterial activity of chitosan increased against Escherichia coli in the presence of EDTA, but there was no significant change against S. aureus.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial activity of chitosan and the interpolyelectrolyte complexes of poly(acrylic acid)-chitosan

Ortega-Ortíz¹,

Gutiérrez-Rodríguez

Cadenas‐Pliego³

et al. 2010

Braz. arch. biol. technol.

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Effect of abiotic factors on the antibacterial activity of chitosan against waterborne pathogens

Cited by 273 publications

References 15 publications

Factors influencing antibacterial activity of chitosan against Aeromonas hydrophila and Staphylococcus aureus

Factors influencing antibacterial activity of chitosan against Aeromonas hydrophila and Staphylococcus aureus

Synthesis and Characterization of Low Molecular Weight Chitosan

Antibacterial activity of chitosan and the interpolyelectrolyte complexes of poly(acrylic acid)-chitosan

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