1
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Yang S, Ten Klooster S, Nguyen KA, Hennebelle M, Berton-Carabin C, Schroën K, van Duynhoven JPM, Hohlbein J. Droplet size dependency and spatial heterogeneity of lipid oxidation in whey protein isolate-stabilized emulsions. Food Res Int 2024; 188:114341. [PMID: 38823851 DOI: 10.1016/j.foodres.2024.114341] [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: 11/15/2023] [Revised: 03/30/2024] [Accepted: 04/17/2024] [Indexed: 06/03/2024]
Abstract
Spatiotemporal assessment of lipid and protein oxidation is key for understanding quality deterioration in emulsified food products containing polyunsaturated fatty acids. In this work, we first mechanistically validated the use of the lipid oxidation-sensitive fluorophore BODIPY 665/676 as a semi-quantitative marker for local peroxyl radical formation. Next, we assessed the impact of microfluidic and colloid mill emulsification (respectively producing mono- and polydisperse droplets) on local protein and lipid oxidation kinetics in whey protein isolate (WPI)-stabilized emulsions. We further used BODIPY 581/591 C11 and CAMPO-AFDye 647 as colocalisation markers for lipid and protein oxidation. The polydisperse emulsions showed an inverse relation between droplet size and lipid oxidation rate. Further, we observed less protein and lipid oxidation occurring in similar sized droplets in monodisperse emulsions. This observation was linked to more heterogeneous protein packing at the droplet surface during colloid mill emulsification, resulting in larger inter-droplet heterogeneity in both protein and lipid oxidation. Our findings indicate the critical roles of emulsification methods and droplet sizes in understanding and managing lipid oxidation.
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Affiliation(s)
- Suyeon Yang
- Laboratory of Biophysics, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands
| | - Sten Ten Klooster
- Laboratory of Food Process Engineering, Wageningen University & Research, 6708 WG Wageningen, the Netherlands
| | - Khoa A Nguyen
- Laboratory of Food Chemistry, Wageningen University & Research, 6708 WG Wageningen, the Netherlands
| | - Marie Hennebelle
- Laboratory of Food Chemistry, Wageningen University & Research, 6708 WG Wageningen, the Netherlands
| | - Claire Berton-Carabin
- Laboratory of Food Process Engineering, Wageningen University & Research, 6708 WG Wageningen, the Netherlands; INRAE, UR BIA, 44300 Nantes, France
| | - Karin Schroën
- Laboratory of Food Process Engineering, Wageningen University & Research, 6708 WG Wageningen, the Netherlands
| | - John P M van Duynhoven
- Laboratory of Biophysics, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands; Unilever Global Foods Innovation Centre, Plantage 14, 6708 WJ Wageningen, the Netherlands.
| | - Johannes Hohlbein
- Laboratory of Biophysics, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands; Microspectroscopy Research Facility, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands.
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2
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Ten Klooster S, Boerkamp VJP, Hennebelle M, van Duynhoven JPM, Schroën K, Berton-Carabin CC. Unravelling the effect of droplet size on lipid oxidation in O/W emulsions by using microfluidics. Sci Rep 2024; 14:8895. [PMID: 38632267 PMCID: PMC11024159 DOI: 10.1038/s41598-024-59170-9] [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: 02/04/2024] [Accepted: 04/08/2024] [Indexed: 04/19/2024] Open
Abstract
Lipid oxidation in emulsions is hypothesised to increase with decreasing droplet size, as this increases the specific oil-water interfacial area, where lipid oxidation is expected to be initiated. In literature, however, contradictory results have been reported, which can be caused by confounding factors such as the oil droplet polydispersity and the distribution of components between the available phases. In this work, monodisperse surfactant-stabilised emulsions with highly controlled droplet sizes of 4.7, 9.1, and 26 µm were produced by microfluidic emulsification. We show that lipid oxidation increases with decreasing droplet size, which we ascribe to the increased contact area between lipids and continuous phase prooxidants. Besides, a significant amount of oxygen was consumed by oxidation of the surfactant itself (Tween 20), an effect that also increased with decreasing droplet size. These insights substantiate the importance of controlling droplet size for improving the oxidative stability of emulsions.
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Affiliation(s)
- Sten Ten Klooster
- Laboratory of Food Process Engineering, Wageningen University and Research, Wageningen, the Netherlands.
| | - Vincent J P Boerkamp
- Laboratory of Food Chemistry, Wageningen University and Research, Wageningen, the Netherlands
| | - Marie Hennebelle
- Laboratory of Food Chemistry, Wageningen University and Research, Wageningen, the Netherlands
| | - John P M van Duynhoven
- Unilever Food Innovation Centre, Wageningen, the Netherlands
- Laboratory of Biophysics, Wageningen University and Research, Wageningen, the Netherlands
| | - Karin Schroën
- Laboratory of Food Process Engineering, Wageningen University and Research, Wageningen, the Netherlands
| | - Claire C Berton-Carabin
- Laboratory of Food Process Engineering, Wageningen University and Research, Wageningen, the Netherlands
- INRAE, UR BIA, 44000, Nantes, France
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3
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Hennebelle M, Villeneuve P, Durand E, Lecomte J, van Duynhoven J, Meynier A, Yesiltas B, Jacobsen C, Berton-Carabin C. Lipid oxidation in emulsions: New insights from the past two decades. Prog Lipid Res 2024; 94:101275. [PMID: 38280491 DOI: 10.1016/j.plipres.2024.101275] [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: 10/23/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 01/29/2024]
Abstract
Lipid oxidation constitutes the main source of degradation of lipid-rich foods, including food emulsions. The complexity of the reactions at play combined with the increased demand from consumers for less processed and more natural foods result in additional challenges in controlling this phenomenon. This review provides an overview of the insights acquired over the past two decades on the understanding of lipid oxidation in oil-in-water (O/W) emulsions. After introducing the general structure of O/W emulsions and the classical mechanisms of lipid oxidation, the contribution of less studied oxidation products and the spatiotemporal resolution of these reactions will be discussed. We then highlight the impact of emulsion formulation on the mechanisms, taking into consideration the new trends in terms of emulsifiers as well as their own sensitivity to oxidation. Finally, novel antioxidant strategies that have emerged to meet the recent consumer's demand will be detailed. In an era defined by the pursuit of healthier, more natural, and sustainable food choices, a comprehensive understanding of lipid oxidation in emulsions is not only an academic quest, but also a crucial step towards meeting the evolving expectations of consumers and ensuring the quality and stability of lipid-rich food products.
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Affiliation(s)
- Marie Hennebelle
- Laboratory of Food Chemistry, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, Netherlands.
| | - Pierre Villeneuve
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - Erwann Durand
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - Jérôme Lecomte
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - John van Duynhoven
- Laboratory of Biophysics, Wageningen University & Research, Wageningen, the Netherlands; Unilever Food Innovation Centre, Wageningen, the Netherlands
| | | | - Betül Yesiltas
- Research group for Bioactives - Analysis and Application, Technical University of Denmark, National Food Institute, Kgs. Lyngby DK-2800, Denmark
| | - Charlotte Jacobsen
- Research group for Bioactives - Analysis and Application, Technical University of Denmark, National Food Institute, Kgs. Lyngby DK-2800, Denmark
| | - Claire Berton-Carabin
- INRAE, UR BIA, Nantes 44300, France; Laboratory of Food Process Engineering, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, Netherlands
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4
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Ten Klooster S, Takeuchi M, Schroën K, Tuinier R, Joosten R, Friedrich H, Berton-Carabin C. Tiny, yet impactful: Detection and oxidative stability of very small oil droplets in surfactant-stabilized emulsions. J Colloid Interface Sci 2023; 652:1994-2004. [PMID: 37690307 DOI: 10.1016/j.jcis.2023.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/12/2023]
Abstract
HYPOTHESIS The shelf life of multiphase systems, e.g. oil-in-water (O/W) emulsions, is severely limited by physical and/or chemical instabilities, which degrade their texture, macroscopic appearance, sensory and (for edible systems) nutritional quality. One prominent chemical instability is lipid oxidation, which is notoriously complex. The complexity arises from the involvement of many physical structures present at several scales (1-10,000 nm), of which the smallest ones are often overlooked during characterization. EXPERIMENTS We used cryogenic transmission electron microscopy (cryo-TEM) to characterize the coexisting colloidal structures at the nanoscale (10-200 nm) in rapeseed oil-based model emulsions stabilized by different concentrations of a nonionic surfactant. We assessed whether the oxidative and physical instabilities of the smallest colloidal structures in such emulsions may be different from those of larger colloidal structures. FINDINGS By deploying cryo-TEM, we analyzed the size of very small oil droplets and of surfactant micelles, which are typically overlooked by dynamic light scattering when larger structures are concomitantly present. Their size and oil content were shown to be stable over incubation, but lipid oxidation products were overrepresented in these very small droplets. These insights highlight the importance of the fraction of "tiny droplets" for the oxidative stability of O/W emulsions.
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Affiliation(s)
- Sten Ten Klooster
- Laboratory of Food Process engineering, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands.
| | - Machi Takeuchi
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Karin Schroën
- Laboratory of Food Process engineering, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands.
| | - Remco Tuinier
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Rick Joosten
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Center for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Heiner Friedrich
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands; Center for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Claire Berton-Carabin
- Laboratory of Food Process engineering, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands; INRAE, BIA, 44000 Nantes, France.
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5
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Kaade W, Rubio S, Bogas-Droy A, de Villedon V, Laurichesse E, Schmitt V. Highly Concentrated Emulsions Containing High Loads of Pterostilbene. ACS OMEGA 2023; 8:25951-25959. [PMID: 37521615 PMCID: PMC10372941 DOI: 10.1021/acsomega.3c01861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/30/2023] [Indexed: 08/01/2023]
Abstract
Pterostilbene is a highly researched molecule due to its bioactivity. However, its hydrophobicity limits its application. For this reason, researchers have sought to encapsulate pterostilbene (namely, in oil-in-water emulsion) to increase its availability. Studies are lacking when it comes to the effects of pterostilbene and its concentration at the oil/water interface. This paper discusses the effects of oil types, storage temperature, and pterostilbene concentration on the stability of the emulsions, as well as the interactions between encapsulated pterostilbene and the oil and water phases. Results showed that pterostilbene is present at the oil/water interface, affecting the interfacial tension and consequently the droplet size. It was also shown that encapsulation efficiency is affected by the storage temperature and oil type. Finally, it was proven that, according to oil types and storage temperature, the stability of pterostilbene to light is affected.
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6
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Berton-Carabin C, Villeneuve P. Targeting Interfacial Location of Phenolic Antioxidants in Emulsions: Strategies and Benefits. Annu Rev Food Sci Technol 2023; 14:63-83. [PMID: 36972155 DOI: 10.1146/annurev-food-060721-021636] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
It is important to have larger proportions of health-beneficial polyunsaturated lipids in foods, but these nutrients are particularly sensitive to oxidation, and dedicated strategies must be developed to prevent this deleterious reaction. In food oil-in-water emulsions, the oil-water interface is a crucial area when it comes to the initiation of lipid oxidation. Unfortunately, most available natural antioxidants, such as phenolic antioxidants, do not spontaneously position at this specific locus. Achieving such a strategic positioning has therefore been an active research area, and various routes have been proposed: lipophilizing phenolic acids to confer them with an amphiphilic character; functionalizing biopolymer emulsifiers through covalent or noncovalent interactions with phenolics; or loading Pickering particles with natural phenolic compounds to yield interfacial antioxidant reservoirs. We herein review the principles and efficiency of these approaches to counteract lipid oxidation in emulsions as well as their advantages and limitations.
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Affiliation(s)
- Claire Berton-Carabin
- INRAE, UR BIA, Nantes, France;
- Laboratory of Food Process Engineering, Wageningen University, Wageningen, Netherlands
| | - Pierre Villeneuve
- CIRAD, UMR Qualisud, Montpellier, France;
- Qualisud, University of Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
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7
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Ten Klooster S, Berton-Carabin C, Schroën K. Design insights for upscaling spontaneous microfluidic emulsification devices based on behavior of the Upscaled Partitioned EDGE device. Food Res Int 2023; 164:112365. [PMID: 36738018 DOI: 10.1016/j.foodres.2022.112365] [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: 08/20/2022] [Revised: 12/09/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
Microfluidic emulsification has the potential to produce emulsions with very controlled droplet sizes in a subtle manner. To support in unleashing this potential, we provide guidelines regarding upscaling based on the performance of Upscale Partitioned EDGE (UPE) devices, using rapeseed oil as the to-be-dispersed phase and whey proteins as the emulsifier. The UPE5x1 device (11,000 droplet formation units (DFUs) of 5 × 1 µm) produced 3.5-µm droplets (CV 3.2 %) at 0.3 mL/h; UPE10x2 (8,000 DFUs of 10 × 2 µm) produced 7-µm droplets (CV 3.2 %) at 0.5 mL/h, and at higher pressures, 32-µm droplets (CV 3-4 %) at 4 mL/h. These productivities are relatively high compared to those of other devices reported in literature (e.g., Microchannel, Tsukuba and Millipede, Harvard). Based on these results, and on others from literature, we conclude that: (1) the continuous phase channel dimensions need to be chosen such that they allow for gradual filling of this channel with droplets without decreasing the pressure over the droplet formation units significantly; (2) the dispersed phase supply channel design should create a wide stable droplet formation pressure range to increase productivity; and (3) higher productivities can be obtained through the choice of the ingredients used; low viscosity dispersed phase and an emulsifier that increases the interfacial tension without negatively affecting device wettability is preferred (e.g., whey protein outperforms Tween 20). These results and design guidelines are expected to contribute to the first food emulsion products prepared with microfluidics.
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Affiliation(s)
- Sten Ten Klooster
- Laboratory of Food Process Engineering, Wageningen University, P.O. Box 17, Bornse Weilanden, 9, 6708 WG Wageningen, the Netherlands.
| | - Claire Berton-Carabin
- Laboratory of Food Process Engineering, Wageningen University, P.O. Box 17, Bornse Weilanden, 9, 6708 WG Wageningen, the Netherlands; INRAE, BIA, 44000 Nantes, France.
| | - Karin Schroën
- Laboratory of Food Process Engineering, Wageningen University, P.O. Box 17, Bornse Weilanden, 9, 6708 WG Wageningen, the Netherlands.
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8
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Fabrication, characterization, and application of catechin-dextran-egg white protein conjugates: Novel antioxidant emulsifiers. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2022.114268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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ten Klooster S, van den Berg J, Berton-Carabin C, de Ruiter J, Schroën K. Upscaling microfluidic emulsification: the importance of sub-structure design in EDGE devices. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Red Raspberry Seed Oil Low Energy Nanoemulsions: Influence of Surfactants, Antioxidants, and Temperature on Oxidative Stability. Antioxidants (Basel) 2022; 11:antiox11101898. [PMID: 36290621 PMCID: PMC9598911 DOI: 10.3390/antiox11101898] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/18/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to assess and improve the oxidative stability of red raspberry seed oil−RO, a potential topical ingredient derived from food industry by-products, on its own and when incorporated in low energy nanoemulsion (NE). The RO’s oxidative stability was assessed at 5, 25, and 40 °C during one month of storage and expressed in: peroxide value, p-anisidine, and thiobarbituric reactive substances—TBARS value, while for NEs, lipid hydroperoxides and TBARS values were monitored. Both synthetic (butylated hydroxytoluene—BHT and ethylenediaminetetraacetic acid—EDTA), and natural (oregano essential oil—ORE and oak fruit extract—OAK) antioxidants were used. Pure RO and RO with BHT or ORE were stable at 5 °C and 25 °C, but at 40 °C BHT showed only moderate protection, while ORE was prooxidant. NEs prepared with new biodegradable polyglycerol esters-based surfactants, with droplet sizes of < 50 nm and narrow size distribution, showed improved physicochemical stability at room temperature, and especially at 40 °C, compared to NEs with polysorbate 80, which required the addition of antioxidants to preserve their stability. Natural antioxidants ORE and OAK were compatible with all NEs; therefore, their use is proposed as an effective alternative to synthetic antioxidants.
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11
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Evaluation of Plant Protein Hydrolysates as Natural Antioxidants in Fish Oil-In-Water Emulsions. Antioxidants (Basel) 2022; 11:antiox11081612. [PMID: 36009330 PMCID: PMC9404908 DOI: 10.3390/antiox11081612] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/15/2022] [Accepted: 08/18/2022] [Indexed: 11/17/2022] Open
Abstract
In this work, we evaluated the physical and oxidative stabilities of 5% w/w fish oil-in-water emulsions stabilized with 1%wt Tween20 and containing 2 mg/mL of protein hydrolysates from olive seed (OSM–H), sunflower (SFSM–H), rapeseed (RSM–H) and lupin (LUM–H) meals. To this end, the plant-based substrates were hydrolyzed at a 20% degree of hydrolysis (DH) employing a mixture 1:1 of subtilisin: trypsin. The hydrolysates were characterized in terms of molecular weight profile and in vitro antioxidant activities (i.e., DPPH scavenging and ferrous ion chelation). After incorporation of the plant protein hydrolysates as water-soluble antioxidants in the emulsions, a 14-day storage study was conducted to evaluate both the physical (i.e., ζ-potential, droplet size and emulsion stability index) and oxidative (e.g., peroxide and anisidine value) stabilities. The highest in vitro DPPH scavenging and iron (II)-chelating activities were exhibited by SFSM–H (IC50 = 0.05 ± 0.01 mg/mL) and RSM–H (IC50 = 0.41 ± 0.06 mg/mL). All the emulsions were physically stable within the storage period, with ζ-potential values below −35 mV and an average mean diameter D[4,3] of 0.411 ± 0.010 μm. Although LUM–H did not prevent lipid oxidation in emulsions, OSM–H and SFSM–H exhibited a remarkable ability to retard the formation of primary and secondary lipid oxidation products during storage when compared with the control emulsion without antioxidants. Overall, our findings show that plant-based enzymatic hydrolysates are an interesting alternative to be employed as natural antioxidants to retard lipid oxidation in food emulsions.
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12
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Bravo-Díaz C. Advances in the control of lipid peroxidation in oil-in-water emulsions: kinetic approaches †. Crit Rev Food Sci Nutr 2022; 63:6252-6284. [PMID: 35104177 DOI: 10.1080/10408398.2022.2029827] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Large efforts have been, and still are, devoted to minimize the harmful effects of lipid peroxidation. Much of the early work focused in understanding both the lipid oxidation mechanisms and the action of antioxidants in bulk solution. However, food-grade oils are mostly present in the form of oil-in-water emulsions, bringing up an increasing complexity because of the three-dimensional interfacial region. This review presents an overview of the kinetic approaches employed in controlling the oxidative stability of edible oil-in-water emulsions and of the main outcomes, with particular emphasis on the role of antioxidants and on the kinetics of the inhibition reaction. Application of physical-organic chemistry methods, such as the pseudophase models to investigate antioxidant partitioning, constitute a remarkable example on how kinetic methodologies contribute to model chemical reactivity in multiphasic systems and to rationalize the role of interfaces, opening new opportunities for designing novel antioxidants with tailored properties and new prospects for modulating environmental conditions in attempting to optimize their efficiency. Here we will summarize the main kinetic features of the inhibition reaction and will discuss on the main factors affecting its rate, including the determination of antioxidant efficiencies from kinetic profiles, structure-reactivity relationships, partitioning of antioxidants and concentration effects.
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Affiliation(s)
- Carlos Bravo-Díaz
- Facultad de Ciencias, Departamento de Química Física, Universidad de Vigo, Vigo, Spain
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13
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Villeneuve P, Bourlieu-Lacanal C, Durand E, Lecomte J, McClements DJ, Decker EA. Lipid oxidation in emulsions and bulk oils: a review of the importance of micelles. Crit Rev Food Sci Nutr 2021:1-41. [PMID: 34839769 DOI: 10.1080/10408398.2021.2006138] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Lipid oxidation is a major cause of quality deterioration in food products. In these foods, lipids are often present in a bulk or in emulsified forms. In both systems, the rate, extent and pathway of oxidation are highly dependent on the presence of colloidal structures and interfaces because these are the locations where oxidation normally occurs. In bulk oils, reverse micelles (association colloids) are present and are believed to play a crucial role on lipid oxidation. Conversely, in emulsions, surfactant micelles are present that also play a major role in lipid oxidation pathways. After a brief description of lipid oxidation and antioxidants mechanisms, this review discusses the current understanding of the influence of micellar structures on lipid oxidation. In particular, is discussed the major impact of the presence of micelles in emulsions, or reverse micelles (association colloids) in bulk oil on the oxidative stability of both systems. Indeed, both micelles in emulsions and associate colloids in bulk oils are discussed in this review as nanoscale structures that can serve as reservoirs of antioxidants and pro-oxidants and are involved in their transport within the concerned system. Their role as nanoreactors where lipid oxidation reactions occur is also commented.
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Affiliation(s)
- Pierre Villeneuve
- CIRAD, UMR QualiSud, Montpellier, France.,QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France
| | - Claire Bourlieu-Lacanal
- QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France.,UMR IATE, Univ Montpellier, INRAE, Institut Agro, Montpellier, France
| | - Erwann Durand
- CIRAD, UMR QualiSud, Montpellier, France.,QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France
| | - Jérôme Lecomte
- CIRAD, UMR QualiSud, Montpellier, France.,QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France
| | | | - Eric A Decker
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
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14
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Roppongi T, Miyagawa Y, Fujita H, Adachi S. Effect of Oil-Droplet Diameter on Lipid Oxidation in O/W Emulsions. J Oleo Sci 2021; 70:1225-1230. [PMID: 34483218 DOI: 10.5650/jos.ess21145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The effect of oil-droplet diameter on lipid oxidation in O/W emulsions is unclear, and conflicting results have been reported. These conflictions may be due to different experimental conditions being used, such as the type of oil, the type of emulsifier, temperature, and the range of oil-droplet diameters tested. The method used to evaluate the oxidation could also have varied among studies. In O/W emulsions, oxygen dissolved in the aqueous phase is transferred to the oil phase through the oil-water interface and is consumed in the oil phase by oxidation. Therefore, the effect of the oil-droplet diameter on the lipid oxidation rate was evaluated by simultaneously solving the mass balance equations of oxygen and oil in the oil phase. The simulation showed that the oil-droplet diameter does not affect the lipid oxidation rate in O/W emulsions with oil-droplet diameters on the order of micrometers or less because the oxidation reaction itself is rate-limiting.
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Affiliation(s)
- Takao Roppongi
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University
| | - Yayoi Miyagawa
- Faculty of Bioenvironmental Sciences, Kyoto University of Advanced Science
| | - Hiroyuki Fujita
- Faculty of Bioenvironmental Sciences, Kyoto University of Advanced Science
| | - Shuji Adachi
- Faculty of Bioenvironmental Sciences, Kyoto University of Advanced Science
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Costa M, Losada-Barreiro S, Bravo-Díaz C, Monteiro LS, Paiva-Martins F. Interfacial Concentrations of Hydroxytyrosol Derivatives in Fish Oil-in-Water Emulsions and Nanoemulsions and Its Influence on Their Lipid Oxidation: Droplet Size Effects. Foods 2020; 9:foods9121897. [PMID: 33353202 PMCID: PMC7765823 DOI: 10.3390/foods9121897] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/10/2020] [Accepted: 12/14/2020] [Indexed: 01/01/2023] Open
Abstract
Reports on the effect of droplet size on the oxidative stability of emulsions and nanoemulsions are scarce in the literature and frequently contradictory. Here, we have employed a set of hydroxytyrosol (HT) esters of different hydrophobicity and fish oil-in-water emulsified systems containing droplets of different sizes to evaluate the effect of the droplet size, surfactant, (ΦI) and oil (ΦO) volume fractions on their oxidative stability. To quantitatively unravel the observed findings, we employed a well-established pseudophase kinetic model to determine the distribution and interfacial concentrations of the antioxidants (AOs) in the intact emulsions and nanoemulsions. Results show that there is a direct correlation between antioxidant efficiency and the concentration of the AOs in the interfacial region, which is much higher (20–200 fold) than the stoichiometric one. In both emulsified systems, the highest interfacial concentration and the highest antioxidant efficiency was found for hydroxytyrosol octanoate. Results clearly show that the principal parameter controlling the partitioning of antioxidants is the surfactant volume fraction, ΦI, followed by the O/W ratio; meanwhile, the droplet size has no influence on their interfacial concentrations and, therefore, on their antioxidant efficiency. Moreover, no correlation was seen between droplet size and oxidative stability of both emulsions and nanoemulsions.
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Affiliation(s)
- Marlene Costa
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
| | - Sonia Losada-Barreiro
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
- Departamento de Química-Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain;
| | - Carlos Bravo-Díaz
- Departamento de Química-Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain;
| | - Luís S. Monteiro
- Chemistry Centre, University of Minho, Gualtar, 4710-057 Braga, Portugal;
| | - Fátima Paiva-Martins
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
- Correspondence:
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Inapurapu SP, Ibrahim A, Kona SR, Pawar SC, Bodiga S, Bodiga VL. Development and characterization of ω-3 fatty acid nanoemulsions with improved physicochemical stability and bioaccessibility. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125515] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Costa M, Freiría-Gándara J, Losada-Barreiro S, Paiva-Martins F, Bravo-Díaz C. Effects of droplet size on the interfacial concentrations of antioxidants in fish and olive oil-in-water emulsions and nanoemulsions and on their oxidative stability. J Colloid Interface Sci 2019; 562:352-362. [PMID: 31855798 DOI: 10.1016/j.jcis.2019.12.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/28/2019] [Accepted: 12/03/2019] [Indexed: 02/05/2023]
Abstract
HYPOTHESIS One fundamental and unsolved question in colloid chemistry, and also in the food industry, is whether molecular distributions, specifically the interfacial concentrations of antioxidants (AOI), are independent of the droplet sizes. Pseudophase kinetic models, widely employed to interpret chemical reactivity in colloidal systems and to determine antioxidant distributions, assume that they are independent. EXPERIMENTS To prove, or discard, the above hypothesis, we prepared and characterized a series of olive and fish oil-in-water nanoemulsions with different droplet sizes, carried out a kinetic study to evaluate their oxidative stability, both in the presence and absence of gallic acid (GA), and determined its interfacial concentrations. FINDINGS Results indicate that a change in the droplet size (80-1300 nm) does not alter the oxidative stability of the nanoemulsions in the absence of GA. Addition of GA increases their oxidative shelf-life and, at constant surfactant volume fraction, ΦI, the oxidative stability and the antioxidant distribution do not depend on the droplet size. Overall, results suggest that the droplet size does not affect the ratio between the rates of radical production and of inhibition by antioxidants, ratio that defines an "efficient" (or inefficient) antioxidant, providing experimental evidence supporting the operative assumption of pseudophase kinetic models.
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Affiliation(s)
- Marlene Costa
- REQUIMTE-LAQV, Departamento de Química e Bioquímica. Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Josefa Freiría-Gándara
- Universidad de Vigo, Facultad de Química, Departamento de Química - Física, 36310 Vigo, Spain
| | - Sonia Losada-Barreiro
- REQUIMTE-LAQV, Departamento de Química e Bioquímica. Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal; Universidad de Vigo, Facultad de Química, Departamento de Química - Física, 36310 Vigo, Spain.
| | - Fátima Paiva-Martins
- REQUIMTE-LAQV, Departamento de Química e Bioquímica. Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Carlos Bravo-Díaz
- Universidad de Vigo, Facultad de Química, Departamento de Química - Física, 36310 Vigo, Spain
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Zhong J, Yang R, Cao X, Liu X, Qin X. Improved Physicochemical Properties of Yogurt Fortified with Fish Oil/γ-Oryzanol by Nanoemulsion Technology. Molecules 2018; 23:E56. [PMID: 29301277 PMCID: PMC6017217 DOI: 10.3390/molecules23010056] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/19/2017] [Accepted: 12/26/2017] [Indexed: 01/22/2023] Open
Abstract
Fish oil has several dietary benefits, but its application in food formulations is limited because of its poor water-solubility, easy oxidation and strong odor. The purposes of this study were to produce a fish oil/γ-oryzanol nanoemulsion and to evaluate the effect of adding this nanoemulsion on the physicochemical and sensory characteristics of yogurts. Adding fish oil/γ-oryzanol nanoemulsion resulted in a significant reduction in the acidity and syneresis of yogurt. Yogurt with the nanoemulsion had significantly lower peroxide value (0.28 mmol/L after 21 days) and higher retention of eicosapentaenoic acid and docosahexaenoic acid contents (decreased to 95% and 94% of its initial value, respectively) than yogurt with fish oil/γ-oryzanol (peroxide value = 0.65 mmol/L; eicosapentaenoic acid and docosahexaenoic acid contents decreased to 72% and 53% of its initial value, respectively). Fish oil/γ-oryzanol nanoemulsion incorporated into yogurt had closer sensory attributes scores to plain yogurt. This study may have important implications for the application of fish oil/γ-oryzanol nanoemulsion in yogurt.
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Affiliation(s)
- Jinfeng Zhong
- College of Food Science, Southwest University, Chongqing 400715, China.
| | - Rong Yang
- College of Food Science, Southwest University, Chongqing 400715, China.
| | - Xiaoyi Cao
- College of Food Science, Southwest University, Chongqing 400715, China.
| | - Xiong Liu
- College of Food Science, Southwest University, Chongqing 400715, China.
| | - Xiaoli Qin
- College of Food Science, Southwest University, Chongqing 400715, China.
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