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Muñoz-Pina S, Duch-Calabuig A, Ruiz De Assín David E, Ros-Lis JV, Amorós P, Argüelles Á, Andrés A. Bioactive compounds and enzymatic browning inhibition in cloudy apple juice by a new magnetic UVM-7-SH mesoporous material. Food Res Int 2022; 162:112073. [DOI: 10.1016/j.foodres.2022.112073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/14/2022] [Accepted: 10/18/2022] [Indexed: 11/27/2022]
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Rascón L, Cruz M, Rodríguez-Jasso RM, Neira-Vielma AA, Ramírez-Barrón SN, Belmares R. Effect of Ohmic Heating on Sensory, Physicochemical, and Microbiological Properties of "Aguamiel" of Agave salmiana. Foods 2020; 9:E1834. [PMID: 33321750 PMCID: PMC7763741 DOI: 10.3390/foods9121834] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 11/17/2022] Open
Abstract
The use of ohmic heating (OH) processing technologies in beverages might provide a higher quality value to the final product; consumers tended to prefer more natural products with minimum preservative substances. The aim of this work was to evaluate the effect of OH over the presence of microorganisms in "aguamiel" as well as to study the effects on physicochemical analysis like total sugars, soluble solids, electric conductivity pH, and color. The results showed that the conductivity of "aguamiel" was 0.374 s/m, this as temperature increased, conductivity rose as well. During OH a bubbling was observed when reaching 70 °C due to the generation of electrochemical reactions during the OH process. OH had a significant effect in the reduction of E. coli, yeast, and lactobacillus compared to conventional pasteurization, reaching optimal conditions for its total inactivation. Regarding its physicochemical properties, both treatments, conventional pasteurization and OH, did not show negative changes in aguamiel, demonstrating that OH technology can be a feasible option as a pasteurization technique. In conclusion it is important to notice that negative changes were not found in quality, color and sugars of "aguamiel". Therefore, ohmic heating can be an option to replace traditional methods used for pasteurization.
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Affiliation(s)
- Luis Rascón
- Food Research Department, School of Chemical Sciences, Autonomus University of Coahuila, Saltillo Coahuila, Boulevard Venustiano Carranza e Ing. José Cárdenas, Col. República, Saltillo C.P. 25280, Coahuila, Mexico; (L.R.); (R.M.R.-J.)
| | - Mario Cruz
- Department of Food Science and Technology, Antonio Narro Autonomous Agricultural University, Calzada Antonio Narro no. 1923, Col. Buena Vista, Saltillo C.P. 25280, Coahuila, Mexico;
| | - Rosa M. Rodríguez-Jasso
- Food Research Department, School of Chemical Sciences, Autonomus University of Coahuila, Saltillo Coahuila, Boulevard Venustiano Carranza e Ing. José Cárdenas, Col. República, Saltillo C.P. 25280, Coahuila, Mexico; (L.R.); (R.M.R.-J.)
| | - Alberto A. Neira-Vielma
- Studies and Research Interdisciplinary Center, Autonomus University of Coahuila, Saltillo Coahuila, Prolongación David Berlanga y 16 de Septiembre, Unidad Camporredondo, Saltillo C.P. 25280, Coahuila, Mexico;
| | - Sonia N. Ramírez-Barrón
- Department of Food Science and Technology, Antonio Narro Autonomous Agricultural University, Calzada Antonio Narro no. 1923, Col. Buena Vista, Saltillo C.P. 25280, Coahuila, Mexico;
| | - Ruth Belmares
- Food Research Department, School of Chemical Sciences, Autonomus University of Coahuila, Saltillo Coahuila, Boulevard Venustiano Carranza e Ing. José Cárdenas, Col. República, Saltillo C.P. 25280, Coahuila, Mexico; (L.R.); (R.M.R.-J.)
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Bucur FI, Grigore-Gurgu L, Crauwels P, Riedel CU, Nicolau AI. Resistance of Listeria monocytogenes to Stress Conditions Encountered in Food and Food Processing Environments. Front Microbiol 2018; 9:2700. [PMID: 30555426 PMCID: PMC6282059 DOI: 10.3389/fmicb.2018.02700] [Citation(s) in RCA: 143] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/23/2018] [Indexed: 12/17/2022] Open
Abstract
Listeria monocytogenes is a human food-borne facultative intracellular pathogen that is resistant to a wide range of stress conditions. As a consequence, L. monocytogenes is extremely difficult to control along the entire food chain from production to storage and consumption. Frequent and recent outbreaks of L. monocytogenes infections illustrate that current measures of decontamination and preservation are suboptimal to control L. monocytogenes in food. In order to develop efficient measures to prevent contamination during processing and control growth during storage of food it is crucial to understand the mechanisms utilized by L. monocytogenes to tolerate the stress conditions in food matrices and food processing environments. Food-related stress conditions encountered by L. monocytogenes along the food chain are acidity, oxidative and osmotic stress, low or high temperatures, presence of bacteriocins and other preserving additives, and stresses as a consequence of applying alternative decontamination and preservation technologies such high hydrostatic pressure, pulsed and continuous UV light, pulsed electric fields (PEF). This review is aimed at providing a summary of the current knowledge on the response of L. monocytogenes toward these stresses and the mechanisms of stress resistance employed by this important food-borne bacterium. Circumstances when L. monocytogenes cells become more sensitive or more resistant are mentioned and existence of a cross-resistance when multiple stresses are present is pointed out.
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Affiliation(s)
- Florentina Ionela Bucur
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Leontina Grigore-Gurgu
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Peter Crauwels
- Institute of Microbiology and Biotechnology, Ulm University, Ulm, Germany
| | | | - Anca Ioana Nicolau
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
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