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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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 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 [ berlandoeri ].

Table of Contents Alerts. Inhibition curves of Staphylococcus aureus at different concentrations of Mexican oregano Lippia berlandieri Schauer essential oil and pH values added to CMC a 0. Journal of Food Quality. The data used to support the findings of this study are available from the corresponding author upon request. Indexed in Science Citation Index Expanded.

Edible Film Preparation Films were made according to the Bertuzzi et al. Moreover, bsrlandieri Fermi model can explain and predict microbial reduction in all tested pathogens and is suitable to describe inactivation in similar matrices and under different operating conditions in the future [ 26 ].

The difference between CMC and starch polymers is the release of the antimicrobial compounds mainly thymol and carvacrol present in MOEO. Inhibition curves were fitted to the Fermi model. Significant differences were found in and values. This model describes a sigmoid decay and generates two biological parameters and between pH and MOEO concentration Table 1.

Journal of Food Quality

Introduction Researchers around the world are investigating the use of essential oils to protect food from microbial growth. This is an open access article distributed under the Creative Commons Attribution Licensewhich permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Inhibition curves of Listeria monocytogenes at different concentrations of Mexican oregano Lippia berlandieri Schauer essential oil and pH values added to CMC a 0. 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 pippia of the most important factors due to antimicrobial dissociation [ 3 ].


To receive news and publication updates for Journal of Food Quality, enter your email address in the box below. As observed, when MOEO concentration increased, a rapid microbial inactivation was observed, while at lower concentrations, the inactivation presented a remarkable nonlinear kinetics. In this berlancieri, 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 ].

Lippia graveolens – Wikipedia, la enciclopedia libre

One inconvenience of EO direct application on surfaces by dipping, powdering, or spraying is that antimicrobial compounds can be berlxndieri or diffuse rapidly from the surface into the product [ 30 ].

In addition, its chemical, physical, and functional characteristics make them suitable to add essential oils EOs as antimicrobials [ 10 — 12 ]. Essential oils also have the additional effect of maintaining the quality of the food during storage, including sensorial, nutritional, and functional properties [ 45 ]. Currently, research has been focused on the use of edible films due to their safety regarding consumption berlandeiri 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 ].

MOEO chemical analysis showed that the two major compounds were thymol 2. Our results demonstrate that edible films can serve as carriers releasing EO onto the surface controlling bacterial growth and reducing diffusion into the lipppia since the EO chemically forms part of berllandieri structure of the film and interacts with the polymer and the plasticizer [ 31 ]. Berlzndieri 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 berlanieri antimicrobial activity in vitro [ 67 ].

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 ].

Materials and Methods 2. Microbial modeling has allowed estimating lkppia intrinsic factors as pH and Berlandier concentration with the synergistic effect against two important food-borne pathogens. Antimicrobial assay was performed. Moreover, there are evidences that Beelandieri incorporated to edible films can inhibit a large variety of food-borne pathogens [ 1315 — 19 ].


MOEO was incorporated at 0. Microbial modeling allows estimating the effects loppia key intrinsic factors such as pH on CMC and starch edible films added with MOEO, showing a synergistic effect between EO concentration and pH, so these films might have the potential to inhibit the surface growth of pathogenic microorganisms in food by being suitable carriers of EO in different food applications.

However, many reports mentioned that, for proper operation of active edible films, the optimal pH should be considered at which the antimicrobial agent may have a state of dissociation that allows better antimicrobial activity. The obtained spectra were compared with the respective mass spectra of pure compounds and with the mass profile of the same compounds available from the US National Institute of Standard Technology NIST library.

The aim of this work was to evaluate the berlqndieri of pH and Mexican oregano essential oil concentration added to CMC and S edible films on Listeria monocytogenes and Staphylococcus aureus. Among them, carboxymethyl cellulose CMC and starch S are the most widespread and economic biomaterials.

Statistical analyses were performed with Minitab 17 software Minitab Inc. Films were made according to the Bertuzzi et al. All tests were run in triplicate. Moreover, it can be observed that, for both kinds of edible films, pH values of 5 berlanxieri 6 are more effective than 7. Based on their traditional use, these extracts obtained berlandirri plants are first recommended, due to their broad-spectrum antimicrobial action and low side effects treatments [ 3 ]. Listeria monocytogenes and Staphylococcus aureus Fermi model biological parameters values at different concentrations of Mexican oregano Berlandieeri berlandieri Schauer essential oil and pH values added to CMC and starch edible films.

Microbial Strains of L. Data were fitted to the Fermi model [ 23 ] from which the biological parameters and were estimated by nonlinear regression using the KaleidaGraph 3.

Consortium of Intermountain Herbaria – Lippia berlandieri

San Claudio, Ciudad Universitaria, Col. Therefore, CMC releases more active compounds. Then, sorbitol Aldrich Chemical Co. In this case, two main components of MOEO are thymol and carvacrol whose pH dissociation values are acidic 4.