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Axelrod RD, Baumgartner J, Beyrer M, Mathys A. Experimental and simulation-based investigation of the interplay between factor gradients following pulsed electric field treatments triggering whey protein aggregation. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2022.111308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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2
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Shaik L, Chakraborty S. Ultrasound processing of sweet lime juice: Effect of matrix pH on microbial inactivation, enzyme stability, and bioactive retention. J FOOD PROCESS ENG 2022. [DOI: 10.1111/jfpe.14231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lubna Shaik
- Department of Food Engineering and Technology Institute of Chemical Technology Mumbai India
| | - Snehasis Chakraborty
- Department of Food Engineering and Technology Institute of Chemical Technology Mumbai India
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3
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Pulsed electric field as a promising technology for solid foods processing: A review. Food Chem 2022; 403:134367. [DOI: 10.1016/j.foodchem.2022.134367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 08/31/2022] [Accepted: 09/18/2022] [Indexed: 10/14/2022]
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4
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Roobab U, Abida A, Chacha JS, Athar A, Madni GM, Ranjha MMAN, Rusu AV, Zeng XA, Aadil RM, Trif M. Applications of Innovative Non-Thermal Pulsed Electric Field Technology in Developing Safer and Healthier Fruit Juices. Molecules 2022; 27:molecules27134031. [PMID: 35807277 PMCID: PMC9268149 DOI: 10.3390/molecules27134031] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 02/04/2023] Open
Abstract
The deactivation of degrading and pectinolytic enzymes is crucial in the fruit juice industry. In commercial fruit juice production, a variety of approaches are applied to inactivate degradative enzymes. One of the most extensively utilized traditional procedures for improving the general acceptability of juice is thermal heat treatment. The utilization of a non-thermal pulsed electric field (PEF) as a promising technology for retaining the fresh-like qualities of juice by efficiently inactivating enzymes and bacteria will be discussed in this review. Induced structural alteration provides for energy savings, reduced raw material waste, and the development of new products. PEF alters the α-helix conformation and changes the active site of enzymes. Furthermore, PEF-treated juices restore enzymatic activity during storage due to either partial enzyme inactivation or the presence of PEF-resistant isozymes. The increase in activity sites caused by structural changes causes the enzymes to be hyperactivated. PEF pretreatments or their combination with other nonthermal techniques improve enzyme activation. For endogenous enzyme inactivation, a clean-label hurdle technology based on PEF and mild temperature could be utilized instead of harsh heat treatments. Furthermore, by substituting or combining conventional pasteurization with PEF technology for improved preservation of both fruit and vegetable juices, PEF technology has enormous economic potential. PEF treatment has advantages not only in terms of product quality but also in terms of manufacturing. Extending the shelf life simplifies production planning and broadens the product range significantly. Supermarkets can be served from the warehouse by increasing storage stability. As storage stability improves, set-up and cleaning durations decrease, and flexibility increases, with only minor product adjustments required throughout the manufacturing process.
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Affiliation(s)
- Ume Roobab
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; (U.R.); (J.S.C.)
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510640, China
| | - Afeera Abida
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan; (A.A.); (A.A.); (G.M.M.)
| | - James S. Chacha
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; (U.R.); (J.S.C.)
- Department of Food Science and Agroprocessing, School of Engineering and Technology, Sokoine University of Agriculture, Chuo Kikuu, Morogogoro P.O. Box 3006, Tanzania
| | - Aiman Athar
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan; (A.A.); (A.A.); (G.M.M.)
| | - Ghulam Muhammad Madni
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan; (A.A.); (A.A.); (G.M.M.)
| | | | - Alexandru Vasile Rusu
- Life Science Institute, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania
- Faculty of Animal Science and Biotechnology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania
- Correspondence: (A.V.R.); (X.-A.Z.); (R.M.A.)
| | - Xin-An Zeng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; (U.R.); (J.S.C.)
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510640, China
- Correspondence: (A.V.R.); (X.-A.Z.); (R.M.A.)
| | - Rana Muhammad Aadil
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan; (A.A.); (A.A.); (G.M.M.)
- Correspondence: (A.V.R.); (X.-A.Z.); (R.M.A.)
| | - Monica Trif
- Department of Food Research, Centre for Innovative Process Engineering (Centiv) GmbH, 28857 Syke, Germany;
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Axelrod R, Beyrer M, Mathys A. Impact of the electric field intensity and treatment time on whey protein aggregate formation. J Dairy Sci 2022; 105:6589-6600. [DOI: 10.3168/jds.2021-21395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 03/29/2022] [Indexed: 11/19/2022]
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6
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Effects of microsecond pulsed electric field (μsPEF) and modular micro reaction system (MMRS) treatments on whey protein aggregation. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.105170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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7
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Zand E, Schottroff F, Steinacker E, Mae-Gano J, Schoenher C, Wimberger T, Wassermann KJ, Jaeger H. Advantages and limitations of various treatment chamber designs for reversible and irreversible electroporation in life sciences. Bioelectrochemistry 2021; 141:107841. [PMID: 34098460 DOI: 10.1016/j.bioelechem.2021.107841] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 01/25/2023]
Abstract
The fundamental mechanisms of pulsed electric fields on biological cells are not yet fully elucidated, though it is apparent that membrane electroporation plays a crucial role. Little is known about treatment-chamber-specific effects, and systematic studies are scarce. Thus, the present study evaluates the (dis-)advantages of various treatment chamber designs for liquid applications at differing scales. Three chambers, namely parallel plate microfluidic (V̇: 0.1 ml/min; titanium electrodes), co-linear meso (V̇: 5.0 ml/min; stainless steel electrodes), and co-linear macro (V̇: 83.3 ml/min; stainless steel electrodes) chambers, were studied. Electroporation effects on Escherichia coli in media with 0.1-10.0 mS/cm were evaluated by plate counts and flow cytometry at 8, 16, and 20 kV/cm. For the microfluidic chamber, predominantly irreversible electroporation (2.5 logs10 reductions) was seen at 0.1 mS/cm, while high irreversible electroporation (4.2 logs10 reductions) at 10.0 mS/cm was observed for the macro chamber. The meso chamber indicated a similar trend towards increased conductivity, even though only low inactivation levels were present. Variation in conductivity and electrode configuration or area likely induces effects resulting in distinct electroporation levels, as observed for the micro and macro chamber. Suitable application scenarios, depending on targeted electroporation effects, were suggested.
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Affiliation(s)
- Elena Zand
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria.
| | - Felix Schottroff
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria; BOKU Core Facility Food & Bio Processing, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria.
| | - Elisabeth Steinacker
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Jennifer Mae-Gano
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Christoph Schoenher
- Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Terje Wimberger
- Health & Environment Department, AIT Austrian Institute of Technology GmbH, Vienna, Austria
| | - Klemens J Wassermann
- Health & Environment Department, AIT Austrian Institute of Technology GmbH, Vienna, Austria
| | - Henry Jaeger
- Institute of Food Technology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
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8
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Scratching the electrode surface: Insights into a high-voltage pulsed-field application from in vitro & in silico studies in indifferent fluid. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137187] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Effect of interphase and interpulse delay in high-frequency irreversible electroporation pulses on cell survival, membrane permeabilization and electrode material release. Bioelectrochemistry 2020; 134:107523. [DOI: 10.1016/j.bioelechem.2020.107523] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 12/18/2022]
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10
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1.2 MV/cm pulsed electric fields promote transthyretin aggregate degradation. Sci Rep 2020; 10:12003. [PMID: 32686729 PMCID: PMC7371718 DOI: 10.1038/s41598-020-68681-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 06/24/2020] [Indexed: 11/08/2022] Open
Abstract
Numerous theoretical studies have been conducted on the effects of high-voltage electric fields on proteins, but few have produced experimental evidence. To acquire experimental data for the amyloid disassemble theory, we exposed transthyretin aggregates to 1,000 ns 1.26 MV/cm pulsed electric fields (PEFs) to promote transthyretin degradation. The process produced no changes in pH, and the resulting temperature increases were < 1 °C. We conclude that the physical effects of PEFs, rather than thermal or chemical effects, facilitate aggregate degradation.
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Schottroff F, Biebl D, Gruber M, Burghardt N, Schelling J, Gratz M, Schoenher C, Jaeger H. Inactivation of vegetative microorganisms by ohmic heating in the kilohertz range – Evaluation of experimental setups and non-thermal effects. INNOV FOOD SCI EMERG 2020. [DOI: 10.1016/j.ifset.2020.102372] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12
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Tinello F, Lante A. Recent advances in controlling polyphenol oxidase activity of fruit and vegetable products. INNOV FOOD SCI EMERG 2018. [DOI: 10.1016/j.ifset.2018.10.008] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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13
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Comparative Study of Phenolic Profile and Content in Infusions and Concentrated Infusions of Buddleja Scordioides Treated by High-Intensity Pulsed Electric Fields (HiPEF). BEVERAGES 2018. [DOI: 10.3390/beverages4040081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The effect of high-intensity pulsed electric fields (HiPEF) has been reported on the microbial resistance of fruit juices and beverages. However, the influence of HiPEF on bioactive compounds in herbal infusions is still limited. The objective of the present work was to evaluate chemical stability of polyphenols of infusions from Buddleja scordioides or Salvilla under thermal processing (concentrates) followed by HiPEF treatments. Buddleja infusions were prepared at 1% w/v of salvilla, heated, filtered and concentrated in a thin falling film evaporator. Three different HiPEF treatments were applied to Buddleja scordioides concentrated beverages. The percentage of pulse rate was 25 and 90%; output temperature, 18.3 ± 1 °C; and the frequency range, 100, 300 and 400 Hz. The feed flow was 0.5 L/h. DPPH radical scavenging assay, inhibition of Nitric Oxide activity and analysis of phenolic acids and flavonoids by UPLC-ESI-MS/MS were determined. ANOVA one-way analysis and Tukey test (p < 0.05) were used to analyze results. Concentration process increases the amount of flavonols; however, the use of HiPEF produces a minor reduction on antioxidant capacity. The use of HiPEF at 1000 kJ/kg and 1100 kJ/kg displays a similar profile on phenolic acids between HiPEF-treated beverages and concentrates, showing that the use of HiPEF may be a promissory technology in the processing practices of herbal infusions.
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Buchmann L, Böcker L, Frey W, Haberkorn I, Nyffeler M, Mathys A. Energy input assessment for nanosecond pulsed electric field processing and its application in a case study with Chlorella vulgaris. INNOV FOOD SCI EMERG 2018. [DOI: 10.1016/j.ifset.2018.04.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Wang Q, Li Y, Sun DW, Zhu Z. Enhancing Food Processing by Pulsed and High Voltage Electric Fields: Principles and Applications. Crit Rev Food Sci Nutr 2018; 58:2285-2298. [PMID: 29393667 DOI: 10.1080/10408398.2018.1434609] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Improvements in living standards result in a growing demand for food with high quality attributes including freshness, nutrition and safety. However, current industrial processing methods rely on traditional thermal and chemical methods, such as sterilization and solvent extraction, which could induce negative effects on food quality and safety. The electric fields (EFs) involving pulsed electric fields (PEFs) and high voltage electric fields (HVEFs) have been studied and developed for assisting and enhancing various food processes. In this review, the principles and applications of pulsed and high voltage electric fields are described in details for a range of food processes, including microbial inactivation, component extraction, and winemaking, thawing and drying, freezing and enzymatic inactivation. Moreover, the advantages and limitations of electric field related technologies are discussed to foresee future developments in the food industry. This review demonstrates that electric field technology has a great potential to enhance food processing by supplementing or replacing the conventional methods employed in different food manufacturing processes. Successful industrial applications of electric field treatments have been achieved in some areas such as microbial inactivation and extraction. However, investigations of HVEFs are still in an early stage and translating the technology into industrial applications need further research efforts.
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Affiliation(s)
- Qijun Wang
- a School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China.,b Academy of Contemporary Food Engineering , South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou 510006 , China.,c Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods , Guangzhou Higher Education Mega Center , Guangzhou 510641 , China
| | - Yifei Li
- a School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China.,b Academy of Contemporary Food Engineering , South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou 510006 , China.,c Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods , Guangzhou Higher Education Mega Center , Guangzhou 510641 , China
| | - Da-Wen Sun
- a School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China.,b Academy of Contemporary Food Engineering , South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou 510006 , China.,c Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods , Guangzhou Higher Education Mega Center , Guangzhou 510641 , China.,d Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre , University College Dublin, National University of Ireland , Belfield , Dublin 4 , Ireland
| | - Zhiwei Zhu
- a School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China.,b Academy of Contemporary Food Engineering , South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou 510006 , China.,c Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods , Guangzhou Higher Education Mega Center , Guangzhou 510641 , China
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16
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Golberg A, Sack M, Teissie J, Pataro G, Pliquett U, Saulis G, Stefan T, Miklavcic D, Vorobiev E, Frey W. Energy-efficient biomass processing with pulsed electric fields for bioeconomy and sustainable development. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:94. [PMID: 27127539 PMCID: PMC4848877 DOI: 10.1186/s13068-016-0508-z] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 04/13/2016] [Indexed: 05/24/2023]
Abstract
Fossil resources-free sustainable development can be achieved through a transition to bioeconomy, an economy based on sustainable biomass-derived food, feed, chemicals, materials, and fuels. However, the transition to bioeconomy requires development of new energy-efficient technologies and processes to manipulate biomass feed stocks and their conversion into useful products, a collective term for which is biorefinery. One of the technological platforms that will enable various pathways of biomass conversion is based on pulsed electric fields applications (PEF). Energy efficiency of PEF treatment is achieved by specific increase of cell membrane permeability, a phenomenon known as membrane electroporation. Here, we review the opportunities that PEF and electroporation provide for the development of sustainable biorefineries. We describe the use of PEF treatment in biomass engineering, drying, deconstruction, extraction of phytochemicals, improvement of fermentations, and biogas production. These applications show the potential of PEF and consequent membrane electroporation to enable the bioeconomy and sustainable development.
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Affiliation(s)
- Alexander Golberg
- />Porter School of Environmental Studies, Tel Aviv University, Tel Aviv, Israel
| | - Martin Sack
- />Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Justin Teissie
- />CNRS, Institut de Pharmacologie et de Biologie Structurale Université de Toulouse, Toulouse, France
| | - Gianpiero Pataro
- />Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Uwe Pliquett
- />Institut für Bioprozeβ- und Analysenmeβtechnik e.V., Heilbad Heiligenstadt, Germany
| | - Gintautas Saulis
- />Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, Kaunas, Lithuania
| | - Töpfl Stefan
- />German Institute of Food Technologies, Quakenbrück, Germany
| | - Damijan Miklavcic
- />Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia
| | - Eugene Vorobiev
- />Departement de Genie Chimique, Centre de Recherche de Royallieu, Universite de Technologie de Compiegne, Compiegne, France
| | - Wolfgang Frey
- />Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany
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Terefe NS, Buckow R, Versteeg C. Quality-related enzymes in plant-based products: effects of novel food processing technologies part 2: pulsed electric field processing. Crit Rev Food Sci Nutr 2015; 55:1-15. [PMID: 24915412 DOI: 10.1080/10408398.2012.701253] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Pulsed electric field (PEF) processing is an effective technique for the preservation of pumpable food products as it inactivates vegetative microbial cells at ambient to moderate temperature without significantly affecting the nutritional and sensorial quality of the product. However, conflicting views are expressed about the effect of PEF on enzymes. In this review, which is part 2 of a series of reviews dealing with the effectiveness of novel food preservation technologies for controlling enzymes, the scientific literature over the last decade on the effect of PEF on plant enzymes is critically reviewed to shed more light on the issue. The existing evidence indicates that PEF can result in substantial inactivation of most enzymes, although a much more intense process is required compared to microbial inactivation. Depending on the processing condition and the origin of the enzyme, up to 97% inactivation of pectin methylesterase, polyphenol oxidase, and peroxidase as well as no inactivation have been reported following PEF treatment. Both electrochemical effects and Ohmic heating appear to contribute to the observed inactivation, although the relative contribution depends on a number of factors including the origin of the enzyme, the design of the PEF treatment chamber, the processing condition, and the composition of the medium.
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Effects of Pulsed Electric Fields (PEF) on Vitamin C and Its Antioxidant Properties. Int J Mol Sci 2015; 16:24159-73. [PMID: 26473846 PMCID: PMC4632744 DOI: 10.3390/ijms161024159] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 09/29/2015] [Accepted: 10/07/2015] [Indexed: 11/17/2022] Open
Abstract
In this study, pulsed electric fields (PEF) treatments and their effects on the structure of vitamin C (VIT-C) were estimated by fluorescence and Fourier transform infrared (FT-IR) spectroscopy, the relative content of VIT-C was measured by HPLC and the antioxidant properties of treated VIT-C by DPPH radical scavenging as well as reducing power tests. The fluorescence intensity of treated VIT-C increased slightly compared to the untreated VIT-C. Moreover, the effect of PEF on the structure of VIT-C was observed using the FT-IR spectra. These phenomena indicated that the PEF affected the conformation of VIT-C, which promoted the VIT-C isomer transformed enol-form into keto-form. In addition, the PEF treatments did not suffer the damage to VIT-C and could slow down the oxidation process in involving of experimental conditions by HPLC. The antioxidant properties of the treated VIT-C were enhanced, which was proved by radical scavenging and also the reducing power tests.
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Reineke K, Schottroff F, Meneses N, Knorr D. Sterilization of liquid foods by pulsed electric fields-an innovative ultra-high temperature process. Front Microbiol 2015; 6:400. [PMID: 25999930 PMCID: PMC4422003 DOI: 10.3389/fmicb.2015.00400] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 04/17/2015] [Indexed: 12/05/2022] Open
Abstract
The intention of this study was to investigate the inactivation of endospores by a combined thermal and pulsed electric field (PEF) treatment. Therefore, self-cultivated spores of Bacillus subtilis and commercial Geobacillus stearothermophilus spores with certified heat resistance were utilized. Spores of both strains were suspended in saline water (5.3 mS cm−1), skim milk (0.3% fat; 5.3 mS cm−1) and fresh prepared carrot juice (7.73 mS cm−1). The combination of moderate preheating (70–90°C) and an insulated PEF-chamber, combined with a holding tube (65 cm) and a heat exchanger for cooling, enabled a rapid heat up to 105–140°C (measured above the PEF chamber) within 92.2–368.9 μs. To compare the PEF process with a pure thermal inactivation, each spore suspension was heat treated in thin glass capillaries and D-values from 90 to 130°C and its corresponding z-values were calculated. For a comparison of the inactivation data, F-values for the temperature fields of both processes were calculated by using computational fluid dynamics (CFD). A preheating of saline water to 70°C with a flow rate of 5 l h−1, a frequency of 150 Hz and an energy input of 226.5 kJ kg−1, resulted in a measured outlet temperature of 117°C and a 4.67 log10 inactivation of B. subtilis. The thermal process with identical F-value caused only a 3.71 log10 inactivation. This synergism of moderate preheating and PEF was even more pronounced for G. stearothermophilus spores in saline water. A preheating to 95°C and an energy input of 144 kJ kg−1 resulted in an outlet temperature of 126°C and a 3.28 log10 inactivation, whereas nearly no inactivation (0.2 log10) was achieved during the thermal treatment. Hence, the PEF technology was evaluated as an alternative ultra-high temperature process. However, for an industrial scale application of this process for sterilization, optimization of the treatment chamber design is needed to reduce the occurring inhomogeneous temperature fields.
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Affiliation(s)
- Kai Reineke
- Quality and Safety of Food and Feed, Leibniz Institute for Agricultural Engineering Potsdam, Germany ; Department of Food Biotechnology and Food Process Engineering, Technische Universitaet Berlin Berlin, Germany
| | - Felix Schottroff
- Department of Food Biotechnology and Food Process Engineering, Technische Universitaet Berlin Berlin, Germany
| | | | - Dietrich Knorr
- Department of Food Biotechnology and Food Process Engineering, Technische Universitaet Berlin Berlin, Germany
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Knoerzer K, Buckow R, Trujillo FJ, Juliano P. Multiphysics Simulation of Innovative Food Processing Technologies. FOOD ENGINEERING REVIEWS 2014. [DOI: 10.1007/s12393-014-9098-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Effects of pulsed electric fields on cytomembrane lipids and intracellular nucleic acids of Saccharomyces cerevisiae. Food Control 2014. [DOI: 10.1016/j.foodcont.2013.11.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Meneses N, Saldaña G, Jaeger H, Raso J, Álvarez I, Cebrián G, Knorr D. Modelling of polyphenoloxidase inactivation by pulsed electric fields considering coupled effects of temperature and electric field. INNOV FOOD SCI EMERG 2013. [DOI: 10.1016/j.ifset.2012.12.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Buckow R, Ng S, Toepfl S. Pulsed Electric Field Processing of Orange Juice: A Review on Microbial, Enzymatic, Nutritional, and Sensory Quality and Stability. Compr Rev Food Sci Food Saf 2013; 12:455-467. [DOI: 10.1111/1541-4337.12026] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Accepted: 04/25/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Roman Buckow
- CSIRO, Animal, Food and Health Sciences; 671 Sneydes Rd.; Werribee; VIC 3030; Australia
| | - Sieh Ng
- CSIRO, Animal, Food and Health Sciences; 671 Sneydes Rd.; Werribee; VIC 3030; Australia
| | - Stefan Toepfl
- German Inst. of Food Technologies (DIL); Prof.-von-Klitzing-Str. 7; 49610 Quakenbrück; Germany
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Sagarzazu N, Cebrián G, Pagán R, Condón S, Mañas P. Emergence of pulsed electric fields resistance in Salmonella enterica serovar Typhimurium SL1344. Int J Food Microbiol 2013; 166:219-25. [PMID: 23973831 DOI: 10.1016/j.ijfoodmicro.2013.07.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 06/28/2013] [Accepted: 07/04/2013] [Indexed: 11/29/2022]
Abstract
In this investigation we selected and isolated a culture derived from Salmonella enterica serovar Typhimurium SL1344 with stable increased resistance to pulsed electric fields (PEF) after repeated rounds of PEF treatment and outgrowth of survivors. The resulting culture showed a higher resistance to PEF treatments under different treatment conditions. The acquisition of PEF resistance was only observed in stationary phase cells. The cytoplasmic membrane of the resistant variant showed a higher resilience against PEF treatments, since a lower permeabilization degree was observed after PEF treatments, in comparison to the parental strain. Resistance to PEF was also accompanied by a higher tolerance to acidic pH, hydrogen peroxide and ethanol, but not to heat. The occurrence of a PEF resistant variant in S. enterica serovar Typhimurium SL1344 emphasizes the need to further study the mechanisms of inactivation and resistance by PEF for an adequate design of safe treatments.
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Affiliation(s)
- N Sagarzazu
- Food Technology, Faculty of Veterinary of Zaragoza, Zaragoza, Spain
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Zhao W, Yang R, Zhang HQ. Recent advances in the action of pulsed electric fields on enzymes and food component proteins. Trends Food Sci Technol 2012. [DOI: 10.1016/j.tifs.2012.05.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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