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Zia H, Murray H, Hofsommer M, Barreto AM, Pavon-Vargas D, Puzovic A, Gędas A, Rincon S, Gössinger M, Slatnar A. Comparing the impact of conventional and non-conventional processing technologies on water-soluble vitamins and color in strawberry nectar - a pilot scale study. Food Chem 2024; 463:141078. [PMID: 39243612 DOI: 10.1016/j.foodchem.2024.141078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 08/09/2024] [Accepted: 08/29/2024] [Indexed: 09/09/2024]
Abstract
A comprehensive comparison was conducted on the effect of conventional thermal processing (TT), high-pressure processing (HP), pulse electric field (PF), and ohmic heating (OH) on water-soluble vitamins and color retention in strawberry nectar. The ascorbic acid (AA) content increased by 15- and 9-fold after TT and PF treatment, respectively, due to rupturing of cells under heat stress and release of intracellular AA. Dehydroascorbic acid (DHA) content did not change considerably after TT and PF treatment but significantly decreased after HP and OH treatment. TT treatment offered the highest total vitamin C retention. The B vitamins remained largely unchanged after processing, with the highest loss of 34 % for riboflavin in OH-treated samples. All the technologies resulted in similar color retention after processing. The study concludes with a standardized comparison of mainstream preservation technologies using pilot-scale equipment. Such an approach significantly increases the applicability of the results presented in the study.
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Affiliation(s)
- Hassan Zia
- GfL Gesellschaft für Lebensmittel-Forschung mbH, Landgrafenstrasse 16, 10787 Berlin, Germany; University of Ljubljana, Kongresni trg 12, 1000, Ljubljana, Slovenia.
| | - Helen Murray
- Federal College and Institute for Viticulture and Pomology, A-3400, Klosterneuburg, Austria
| | - Mikko Hofsommer
- GfL Gesellschaft für Lebensmittel-Forschung mbH, Landgrafenstrasse 16, 10787 Berlin, Germany
| | | | - Darío Pavon-Vargas
- University of Parma, Viale delle Scienze 181/A, 43124 Parma, Italy.; CFT S.P.A, Via Paradigna, 94/a, 43122 Parma, Italy
| | - Alema Puzovic
- University of Ljubljana, Kongresni trg 12, 1000, Ljubljana, Slovenia
| | - Astrid Gędas
- University of Hamburg, Ohnhorststrasse 18, 22609 Hamburg, Germany
| | - Sebastian Rincon
- INRAE, Avignon University, UMR408 SQPOV, F-84000, Avignon, France
| | - Manfred Gössinger
- Federal College and Institute for Viticulture and Pomology, A-3400, Klosterneuburg, Austria
| | - Ana Slatnar
- University of Ljubljana, Kongresni trg 12, 1000, Ljubljana, Slovenia
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Zhang Z, Chen Y, Cheng Y, Gao Z, Qu K, Chen Z, Yue L, Guan W. Effects of Pulsed Electric Field and High-Pressure Processing Treatments on the Juice Yield and Quality of Sea Buckthorn. Foods 2024; 13:1829. [PMID: 38928771 PMCID: PMC11202788 DOI: 10.3390/foods13121829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 05/23/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024] Open
Abstract
Sea buckthorn juice has high nutritional value and a rich flavor that consumers enjoy. Traditional sea buckthorn thermal processing (TP) technology has problems such as low juice yield, poor quality, and poor flavor. Sea buckthorn berries are processed using a technique combining pulsed electric field (PEF) and high-pressure processing (HPP) to increase juice yield and study its impact on the quality and volatile aroma of sea buckthorn juice. Results have show that, compared with TP, under the condition of PEF-HPP, the juice yield of sea buckthorn significantly increased by 11.37% (p > 0.05); TP and PEF-HPP treatments could effectively kill microorganisms in sea buckthorn juice, but the quality of sea buckthorn juice decreased significantly after TP treatment (p > 0.05), whereas PEF-HPP coupling technology could maximally retain the nutrients of sea buckthorn juice while inhibiting enzymatic browning to improve color, viscosity, and particle size. The flavor of sea buckthorn juice is analyzed using electronic nose (E-nose) and gas chromatography-ion mobility spectrometer (GC-IMS) techniques, and it has been shown that PEF-HPP retains more characteristic volatile organic compounds (VOCs) of sea buckthorn while avoiding the acrid and pungent flavors produced by TP, such as benzaldehyde, (E)-2-heptenal, and pentanoic acid, among others, which improves the sensory quality of sea buckthorn juice. PEF-HPP technology is environmentally friendly and efficient, with significant economic benefits. Research data provide information and a theoretical basis for the sea buckthorn juice processing industry.
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Affiliation(s)
- Zhiwei Zhang
- Tianjin Key Laboratory of Food Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.Z.); (Y.C.); (Y.C.)
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.G.); (K.Q.)
| | - Yixuan Chen
- Tianjin Key Laboratory of Food Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.Z.); (Y.C.); (Y.C.)
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.G.); (K.Q.)
| | - Yuying Cheng
- Tianjin Key Laboratory of Food Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.Z.); (Y.C.); (Y.C.)
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.G.); (K.Q.)
| | - Zhenhong Gao
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.G.); (K.Q.)
| | - Kunsheng Qu
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.G.); (K.Q.)
| | - Zhixi Chen
- Huachi Gannong Biotechnology Company Limited, Qingyang 745600, China;
| | - Lihua Yue
- Chengde Astronaut Mountainous Plant Technology Company Limited, Chengde 068450, China;
| | - Wenqiang Guan
- Tianjin Key Laboratory of Food Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.Z.); (Y.C.); (Y.C.)
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China; (Z.G.); (K.Q.)
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De Gol C, Moodycliffe A, den Besten HMW, Zwietering MH, Beyrer M. Pulsed electric field treatment for preservation of Chlorella suspensions and retention of gelling capacity. Food Res Int 2024; 182:114154. [PMID: 38519182 DOI: 10.1016/j.foodres.2024.114154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/04/2024] [Accepted: 02/17/2024] [Indexed: 03/24/2024]
Abstract
Pulsed electric field (PEF) processing has emerged as an alternative to thermal pasteurization for the shelf-life extension of heat-sensitive liquids at industrial scale. It offers the advantage of minimal alteration in physicochemical characteristics and functional properties. In this study, a pilot-scale continuous PEF processing (Toutlet < 55 °C) was applied to microalgae Chlorella vulgaris (Cv) suspensions (pH = 6.5), which was proposed as a functional ingredient for plant-based foods. Cv suspensions were inoculated with three distinct food spoilage microorganisms (Pseudomonas guariconensis, Enterobacter soli and Lactococcus lactis), isolated from the Cv biomass. PEF treatments were applied with varying electric field strength Eel of 16 to 28 kV/cm, pulse repetition rate f of 100 to 140 Hz, with a pulse width τ of 20 μs and an inlet product temperature Tin of 30 °C. The aim was to evaluate the PEF-induced microbial reduction and monitor the microbial outgrowth during a 10-day cold storage period (10 °C). Maximum inactivation of 4.1, 3.7 and 3.6 logs was achieved (28 kV/cm and 120 Hz) for the investigated isolates, respectively. Under these conditions, the critical electric field strengths Ecrit, above which inactivation was observed, ranged from 22.6 to 24.6 kV/cm. Moreover, repeated PEF treatment resulted in similar inactivation efficiency, indicating its potential to enhance shelf-life further.
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Affiliation(s)
- Cora De Gol
- University of Applied Sciences and Arts Western Switzerland, School of Engineering, Sion, Switzerland; Food Microbiology, Wageningen University & Research, Wageningen, the Netherlands
| | - Ailsa Moodycliffe
- University of Applied Sciences and Arts Western Switzerland, School of Engineering, Sion, Switzerland
| | - Heidy M W den Besten
- Food Microbiology, Wageningen University & Research, Wageningen, the Netherlands
| | - Marcel H Zwietering
- Food Microbiology, Wageningen University & Research, Wageningen, the Netherlands
| | - Michael Beyrer
- University of Applied Sciences and Arts Western Switzerland, School of Engineering, Sion, Switzerland.
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da Silva PM, Esparza-Flores EE, Virgili AH, de Menezes EW, Fernandez-Lafuente R, Dal Magro L, Rodrigues RC. Effect of Support Matrix and Crosslinking Agents on Nutritional Properties of Orange Juice during Enzyme Clarification: A Comparative Study. Foods 2023; 12:3919. [PMID: 37959038 PMCID: PMC10647825 DOI: 10.3390/foods12213919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/17/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
This study investigated the impact of a support matrix and active group on the support to the nutritional properties of orange juice after juice clarification. Pectinase was immobilized on chitosan and aminated silica supports, activated with genipin or glutaraldehyde, and applied for juice clarification. The effects on various juice properties, including reducing sugars, total soluble solids, vitamin C, and phenolic compounds, juice color, and pH, were evaluated. The results revealed that the immobilization on chitosan activated using genipin resulted in the highest biocatalyst activity (1211.21 U·g-1). The juice treatments using the biocatalysts led to turbidity reduction in the juice (up to 90%), with the highest reductions observed in treatments involving immobilized enzyme on chitosan. Importantly, the enzymatic treatments preserved the natural sugar content, total soluble solids, and pH of the juice. Color differences between treated and raw juice samples were especially relevant for those treated using enzymes, with significant differences in L* and b*, showing loss of yellow vivid color. Analysis of phenolic compounds and vitamin C showed no significant alterations after the enzymatic treatment of the raw juice. According to our results, the clarification of orange juice using immobilized enzymes can be a compromise in turbidity reduction and color reduction to maintain juice quality.
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Affiliation(s)
- Pâmela M. da Silva
- Biocatalysis and Enzyme Technology Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, P.O. Box 15090, Porto Alegre 91501-970, RS, Brazil; (P.M.d.S.); (E.E.E.-F.)
| | - Eli Emanuel Esparza-Flores
- Biocatalysis and Enzyme Technology Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, P.O. Box 15090, Porto Alegre 91501-970, RS, Brazil; (P.M.d.S.); (E.E.E.-F.)
| | - Anike H. Virgili
- LSS—Laboratory of Solids and Surfaces, Instituto de Química, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, RS, Brazil; (A.H.V.); (E.W.d.M.)
| | - Eliana W. de Menezes
- LSS—Laboratory of Solids and Surfaces, Instituto de Química, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, RS, Brazil; (A.H.V.); (E.W.d.M.)
| | | | - Lucas Dal Magro
- Instituto Federal de Educação Ciência e Tecnologia Sul-Rio-Grandense—IFSul, Pelotas 96015-360, RS, Brazil;
| | - Rafael C. Rodrigues
- Biocatalysis and Enzyme Technology Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, P.O. Box 15090, Porto Alegre 91501-970, RS, Brazil; (P.M.d.S.); (E.E.E.-F.)
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