Effect of chitosan molecular weight on the antimicrobial activity and release rate of carvacrol-enriched films

Fernández‐Pan, Idoya; Maté, Juan I.; Gardrat, Christian; Coma, Véronique

doi:10.1016/j.foodhyd.2015.04.033

Cited by 126 publications

(52 citation statements)

References 31 publications

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“…Carvacrol, as the major constituent of OEO, has strong antimicrobial activity. Fernández-Pan et al (11) found that chitosan film containing carvacrol inhibited the growth of the gramnegative bacteria Pseudomonas fragi, Shewanella putrefaciens, and Aeromonas hydrophila.…”

Section: Resultsmentioning

confidence: 99%

Preservation of Brussels Sprouts by Pullulan Coating Containing Oregano Essential Oil

Kraśniewska

Gniewosz

Kosakowska

et al. 2016

Journal of Food Protection

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In this study, the effectiveness of pullulan (a fungal polysaccharide) film containing oregano essential oil (OEO) at 1.0 to 10.0% was evaluated against bacteria, yeasts, and molds. The quality of the sprouts, as determined by weight loss, color, and appearance, was monitored during storage at 2 and 16°C. An organoleptic evaluation of odor preference and odor acceptability of OEO on the Brussels sprouts was also conducted. The antimicrobial activity of pullulan films with OEO increased significantly with the increase in OEO concentration (1 to 10%). Pullulan films with OEO were more effective for inhibiting the growth of yeasts and molds than for inhibiting gram-positive and gram-negative bacteria. Pullulan with 1.0% OEO was an effective combination and was used subsequently as the base coating for maintaining the safety and quality of fresh Brussels sprouts stored at 16°C for 14 days. The pullulan coating containing 1.0% OEO reduced Aspergillus niger populations by 2 log CFU/g. This coating also reduced weight loss in the sprouts. Compared with uncoated Brussels sprouts, the percent weight loss after 14 days was reduced in samples coated with pullulan and with pullulan plus 1% OEO by 3.81 and 6.06%, respectively, after storage at 2°C and by 8.04 and 9.30%, respectively, after storage 16°C. The coating also significantly reduced changes in general appearance and color during storage. Evaluation of the organoleptic properties indicated that pullulan containing OEO had only a slight detrimental effect on odor properties. Incorporating OEO into a delivery system for antimicrobial compounds in pullulan coatings extended the microbiological shelf life of Brussels sprouts.

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Section: Resultsmentioning

confidence: 99%

Preservation of Brussels Sprouts by Pullulan Coating Containing Oregano Essential Oil

Kraśniewska

Gniewosz

Kosakowska

et al. 2016

Journal of Food Protection

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“…; Fernández‐Pan et al . ). These techniques offer advantages over traditional preservatives including the provision of a continuous AM effect on foods for extended times and their ability to minimize interactions and possible inactivation of AM agents with food components (Muriel‐Galet et al .…”

Section: Introductionmentioning

confidence: 97%

Effect of Poly(Lactic Acid)/Kenaf Composites Incorporated with Thymol on the Antimicrobial Activity of Processed Meat

Tawakkal

Cran

Bigger

2016

Journal of Food Processing and Preservation

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Bio‐based composites comprised of poly(lactic acid) (PLA), kenaf fibers and thymol were developed and their antimicrobial (AM) properties and stability under different storage conditions investigated. The composite films containing 20‐30% w/w thymol reduced E. coli in tryptone soy broth after two days at 37C and imparted a significant zone of inhibition in contact with E. coli inoculated plates. The composite films also reduced E. coli inoculated on the surface of processed sliced chicken samples after 30 days at 10C both in direct contact and in the vapour phase. The thymol additive was retained in the PLA/kenaf films that were wrapped with aluminium foil after 3 months of storage at ambient temperatures; however, unwrapped films lost some thymol to the atmosphere. The PLA/kenaf/thymol composite films show a strong potential for the development of active packaging systems in order to extend the shelf‐life of some processed food products. Practical Applications Food packaging materials based on biopolymers are becoming increasingly popular. The synthesis of biopolymers, however, can be expensive and the resulting material properties are inferior to existing packaging materials. The addition of natural fibers can both reduce production costs and offer mechanical reinforcement to biopolymers such as poly(lactic acid) (PLA). Moreover, the addition of antimicrobial (AM) additives such as essential oil extracts can further enhance packaging functionality by preserving various foods. This study presents a packaging system comprised of a bio‐derived polymer (PLA) filled with a natural and abundant fiber (kenaf) incorporating an essential oil extract (thymol) to deliver a novel material with the potential to extend the shelf‐life of processed meat products.

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“…Therefore, the molecular weight is a relection of the process conditions used to obtain chitosan from the puriication and thermo-alkaline deacetylation of chitin. Other investigations have reported molecular weights for shrimp obtained chitosan of 136 [23], 180 [24], and 1260 kDa [25]. While the values reported for chitosan obtained from crab shells vary from 1240 [26] to 483 kDa [2 ].…”

Section: Results and Discussion Chitosan Characterizationmentioning

confidence: 99%

“…While the values reported for chitosan obtained from crab shells vary from 1240 [26] to 483 kDa [2 ]. For fungal chitosan, reports show low molecular weight, from 41 [24] to 110-150 kDa [25]. Davoodbasha et al [28] conducted antimicrobial tests with commercial chitosan 100-300 kDa.…”

Section: Results and Discussion Chitosan Characterizationmentioning

confidence: 99%

Antimicrobial Activity of Chitosan Membranes Against Staphylococcus Aureus of Clinical Origin

Escárcega-Galaz¹,

López‐Cervantes²,

Sánchez-Machado³

et al. 2017

The Rise of Virulence and Antibiotic Resistance in ≪i>Staphylococcus Aureus

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Healthy human skin has beneicial microlora and many pathogens causing infections. Staphylococcus aureus is the most prevalent and can have multiresistance to antibiotics. Chitosan is a polysaccharide composed of glucosamine and N-acetyl-D-glucosamine, which is biodegradable and has antimicrobial activity. "s part of a national scientiic research project for the development and application of biomaterials, we decided to study the efect of diferent membranes based on chitosan against strains of S. aureus isolated from infected ulcers. The study found that seven of nine strains of S. aureus are sensitive to rifampin and the least eight of nine strains were multiresistant to more than ten antibiotics. "ll chitosan-based membranes conirm its antimicrobial efect on direct contact with an increase in its diameter. The contact area of the membranes is increased according to the concentration of chitosan. The highest average area increase was the chitosan membranes with honey and glycerin, 88.32%. Chitosan membranes have shown their efectiveness against S. aureus strains of clinical origin. Thus, these materials can be applied for the treatment of chronic ulcers without toxic hazards and resistance caused by antibiotics.

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Effect of chitosan molecular weight on the antimicrobial activity and release rate of carvacrol-enriched films

Cited by 126 publications

References 31 publications

Preservation of Brussels Sprouts by Pullulan Coating Containing Oregano Essential Oil

Preservation of Brussels Sprouts by Pullulan Coating Containing Oregano Essential Oil

Effect of Poly(Lactic Acid)/Kenaf Composites Incorporated with Thymol on the Antimicrobial Activity of Processed Meat

Antimicrobial Activity of Chitosan Membranes Against Staphylococcus Aureus of Clinical Origin

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