Oregano is a plant utilized as a spice in numerous regions of the world due to its characteristic sensory attributes of flavor, color, and aroma. The use of oregano. This study evaluated growth patterns of Mexican oregano (Lippia berlandieri) under salt stress and tested the hypothesis that this species is salt tolerant. J Food Prot. Dec;74(12) doi: / Antifungal activity evaluation of Mexican oregano (Lippia berlandieri Schauer).
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MOEO chemical analysis showed that the two major compounds were thymol 2. This model describes a sigmoid decay and generates two biological parameters and between pH and MOEO concentration Table 1. This is an open access article distributed under the Creative Commons Berlandieru Licensewhich permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. As observed, when MOEO concentration increased, a rapid microbial inactivation was observed, while at lower li;pia, the inactivation presented a remarkable nonlinear kinetics.
Listeria monocytogenes and Staphylococcus aureus Fermi model biological parameters values at different concentrations of Mexican oregano Lippia berlandieri Schauer essential oil and pH values added to CMC and starch edible films.
Subscribe to Table of Contents Alerts. Inhibition curves of Listeria monocytogenes at different concentrations of Mexican oregano Lippia berlandieri Schauer essential oil and pH values added to CMC a 0.
Moreover, these authors pointed out that EO effectiveness is influenced by the sensitivity of the microorganism. Microbial Strains of L.
The data used to support the findings of this study are available from the corresponding author upon request. Carvacrol 5-isopropylmethylphenol and thymol 2-isopropylmethylphenol are the major components of the essential oils of some species belonging to the Lamiaceae family including oregano, and these are phenolic compounds; isomers of monoterpenes exhibit significant antimicrobial activity in vitro [ 67 ].
The main advantage of using EOs in a polymer matrix coating is a slow diffusion of the antimicrobial agent, leaving high concentrations of the active compound in contact with the food surface where contamination has occurred or is likely to occur, for a long period [ 20 ].
Edible Film Preparation Films were made according to the Bertuzzi et al. Moreover, there are evidences that EOs incorporated to edible films can inhibit a large variety of food-borne pathogens [ 1315 — 19 ].
Journal of Food Quality. Inhibition curves were fitted to the Fermi model. Therefore, CMC releases more active compounds. Natural antimicrobial compounds effectiveness depends on the type, genus, species, and strain of the target microorganism and some food intrinsic and extrinsic factors such as pH, temperature, water content, atmospheric composition, and initial microbial load, with pH being one of the most important factors due to antimicrobial dissociation [ 3 ].
Currently, research has been focused on the use of edible films due to their safety regarding consumption and friendly relation with the environment, and coating materials being used currently include polysaccharides cellulose derivatives, starch, chitin, and gumsproteins soy, milk, gelatin, corn zein, and glutenand lipids oils, waxes, and resins [ 9 ].
To receive news and publication updates for Journal of Food Quality, enter your email address in the box below. Antimicrobial assay was performed. Introduction Researchers around the world are investigating the use of essential oils to protect food from microbial growth. Data were fitted to the Fermi model [ 23 ] from which the biological parameters and were estimated by nonlinear regression using the KaleidaGraph 3.
Materials and Methods 2. In addition, its chemical, physical, and functional characteristics make them suitable to add essential oils EOs as antimicrobials [ 10 — 12 ].
Table of Contents Alerts. Our results demonstrate that edible films can serve as carriers releasing EO onto the surface controlling bacterial growth and reducing diffusion into the agar since the EO chemically forms part of the structure of the film and interacts with the polymer and the plasticizer [ 31 ].
Then, sorbitol Aldrich Chemical Co. Indexed in Science Citation Bfrlandieri Expanded. In this case, two main components of MOEO are thymol and carvacrol whose pH dissociation values are acidic 4.
Lippia berlandieri ·
Berlanrieri curves for both berlaandieri are presented in Figures 1 and 2. The difference between CMC and starch polymers is the release of the antimicrobial compounds mainly thymol and carvacrol present in MOEO. Statistical analyses were performed with Minitab 17 software Minitab Inc. Several works in the literature focus on the evaluation of the antibacterial effect of EOs and propose them as an interesting option to ensure the safety and quality of minimally processed foods and extend their shelf life [ 1314 ].
Correspondence should be addressed to Raul Avila-Sosa ; xm.
In this report, the kind of polymer chain and pH affects the release of antimicrobial MOEO compounds due to many factors such as electrostatic interactions, osmosis, structural changes, and environmental conditions [ 732 ]. MOEO was incorporated at 0. Among them, carboxymethyl cellulose CMC and starch S are the most widespread and economic biomaterials. The aim of this work was berandieri evaluate the effect of pH and Mexican oregano essential oil concentration added to CMC and S edible films on Listeria monocytogenes and Staphylococcus aureus.
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Therefore, future investigations should be conducted for the application of CMC and starch as edible coatings with MOEO in food to confirm their antibacterial effect and mechanical and sensory properties. The antimicrobial activity of essential oils and plant extracts is well known for a long time, and many research results have been published against food-borne pathogens [ 1 ] and about their low toxicity to mammals, fewer environmental effects, and low cost, which make them more attractive than synthetic antimicrobials [ 2 ].
Significant differences were found in and values.