1
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Zhang R, Corstens M, Luo Z, Cao J, Schroen K. Effect of pH on the emulsifying performance of protein-polysaccharide complexes. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:7649-7655. [PMID: 38767462 DOI: 10.1002/jsfa.13601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/23/2024] [Accepted: 03/18/2024] [Indexed: 05/22/2024]
Abstract
BACKGROUND Protein-polysaccharide complexes have been successfully used for emulsion stabilization. However, it is unclear how the complex's surface charge influences aggregation stability and coalescence stability of emulsions, and whether a low charged interfacial film can still maintain the coalescence stability of oil droplets. In the present study, the effects of pH (around the pI of protein) on the aggregation and coalescence stability of emulsions were investigated. RESULTS Whey protein isolate (WPI) and peach gum polysaccharides (PGP) complexes (WPI-PGP complexes) were synthesized at pH 3, 4 and 5. Their sizes were 598, 274 and 183 nm, respectively, and their ζ-potentials were +2.9, -8.6 and -22.8 mV, respectively. Interface rheological experiments showed that WPI-PGP complex at pH 3 had the lowest interfacial tension, and formed the softest film compared to the complexes at pH 4 and 5. Microfluidic experiments showed that all WPI-PGP complexes were able to stabilize droplets against coalescence within short timescales (milliseconds). At pH 3, no coalescence was observed even under conditions where the continuous phase flow influenced the shape of oil droplets (from spheres to ellipsoids). At pH 4 and 5, the model emulsions were stable over 16 days of storage, extensive aggregation and creaming occurred at pH 3 after 8 days. Importantly, no coalescence took place. CONCLUSION The present study confirmed that the aggregation stability of the emulsions was mainly determined by the surface charge of the complex, whereas the coalescence stability of emulsions is expectedly determined by steric repulsion, providing new insights into how to prepare stable food emulsions. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Ruyuan Zhang
- College of Biological Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
- Department of Agrotechnology and Food, Laboratory of Food Process Engineering, Wageningen University, Wageningen, The Netherlands
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Meinou Corstens
- Department of Agrotechnology and Food, Laboratory of Food Process Engineering, Wageningen University, Wageningen, The Netherlands
| | - Zisheng Luo
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Jiarui Cao
- Department of Agrotechnology and Food, Laboratory of Food Process Engineering, Wageningen University, Wageningen, The Netherlands
| | - Karin Schroen
- Department of Agrotechnology and Food, Laboratory of Food Process Engineering, Wageningen University, Wageningen, The Netherlands
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2
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Chrysanthou A, Bosch-Fortea M, Nadal C, Zarbakhsh A, Gautrot JE. Interfacial mechanics of β-casein and albumin mixed protein assemblies at liquid-liquid interfaces. J Colloid Interface Sci 2024; 674:379-391. [PMID: 38941932 DOI: 10.1016/j.jcis.2024.06.111] [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: 11/28/2023] [Revised: 06/03/2024] [Accepted: 06/14/2024] [Indexed: 06/30/2024]
Abstract
Protein emulsifiers play an important role in formulation science, from food product development to emerging applications in biotechnologies. The impact of mixed protein assemblies on surface composition and interfacial shear mechanics remains broadly unexplored, in comparison to the impact that formulation has on dilatational mechanics and surface tension or pressure. In this report, we use interfacial shear rheology to quantify the evolution of interfacial shear moduli as a function of composition in bovine serum albumin (BSA)/β-casein mixed assemblies. We present the pronounced difference in mechanics of these two protein, at oil interfaces, and observe the dominance of β-casein in regulating interfacial shear mechanics. This observation correlates well with the strong asymmetry of adsorption of these two proteins, characterised by fluorescence microscopy. Using neutron reflectometry and fluorescence recovery after photobleaching, we examine the architecture of corresponding protein assemblies and their surface diffusion, providing evidence for distinct morphologies, but surprisingly comparable diffusion profiles. Finally, we explore the impact of crosslinking and sequential protein adsorption on the interfacial shear mechanics of corresponding assemblies. Overall, this work indicates that, despite comparable surface densities, BSA and β-casein assemblies at liquid-liquid interfaces display almost 2 orders of magnitude difference in interfacial shear storage modulus and markedly different viscoelastic profiles. In addition, co-adsorption and sequential adsorption processes are found to further modulate interfacial shear mechanics. Beyond formulation science, the understanding of complex mixed protein assemblies and mechanics may have implications for the stability of emulsions and may underpin changes in the mechanical strength of corresponding interfaces, for example in tissue culture or in physiological conditions.
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Affiliation(s)
- Alexandra Chrysanthou
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Minerva Bosch-Fortea
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Clemence Nadal
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Ali Zarbakhsh
- School of Physical and Chemical Sciences, Department of Chemistry, Queen Mary University of London, Mile End Road, E1 4NS London, United Kingdom
| | - Julien E Gautrot
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom.
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3
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Liu QQ, Yang Q, Wang YR, Jiang YX, Chen HQ. Pretreatment with low-frequency magnetic fields can improve the functional properties of pea globulin amyloid-like fibrils. Food Chem 2024; 439:138135. [PMID: 38064827 DOI: 10.1016/j.foodchem.2023.138135] [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: 09/18/2023] [Revised: 11/20/2023] [Accepted: 12/01/2023] [Indexed: 01/10/2024]
Abstract
Plant protein fibrils have recently attracted considerable attention due to their superior mechanical and interfacial properties. The objective of this study was to evaluate the feasibility of low-frequency magnetic field (LF-MF) pretreatment in enhancing the conversion and functional characteristics of the amyloid-like fibrils derived from pea globulin (PG), which was considered a sustainable hypoallergenic protein. The results showed that LF-MF-treated PG (MPG) assembled into longer amyloid-like fibrils compared with native PG (NPG). The MPG presented similar gelling, emulsifying, and foaming properties to the NPG, while the fibril samples exhibited significantly improved functional properties. Moreover, the amyloid-like fibrils generated from the MPG (MPGF) showed large aspect ratios accompanied by superior solubility, molecular flexibility, emulsion stability, and gelling properties. The improved functional properties of the amyloid-like fibrils generated from the MPG can provide a promising outlook for expanding the applications of the PG in food, medicine and other fields.
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Affiliation(s)
- Qing-Qing Liu
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China; School of Food and Biological Engineering, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China
| | - Qin Yang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China; School of Food and Biological Engineering, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China
| | - Ya-Ru Wang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China; School of Food and Biological Engineering, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China
| | - Yi-Xuan Jiang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China; School of Food and Biological Engineering, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China
| | - Han-Qing Chen
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China; School of Food and Biological Engineering, Hefei University of Technology, 420 Feicui Road, Hefei, Anhui 230601, PR China.
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4
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Chen Y, Yi X, Pei Z, Zhang X, Gao X, Zhang W, Shen X. Bovine serum albumin-liposome stabilized high oil-phase emulsion: Effect of liposome ratio on interface properties and stability. Int J Biol Macromol 2024; 266:131040. [PMID: 38518937 DOI: 10.1016/j.ijbiomac.2024.131040] [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: 10/11/2023] [Revised: 03/01/2024] [Accepted: 03/19/2024] [Indexed: 03/24/2024]
Abstract
This study aimed to solve the issue of poor lipophilicity of natural bovine serum albumin (BSA) by combining with liposomes (Lips) to stabilize high oil-phase emulsions (HOPEs). The interaction between BSA and Lips was mainly driven by hydrophobic forces, followed by hydrogen bonding. The secondary structure and tertiary structure of BSA were characterized and indicated that the addition of Lips promoted the structural expansion of BSA exposing the hydrophobic groups inside. Interfacial adsorption behaviours were assessed through dynamic interfacial tension, three-phase contact angle, and quartz crystal microbalance with dissipation. These results indicated that BSA-Lips crosslinking improved wettability, promoting adsorption and rearrangement at the oil-water interface, thereby resulting in a dense interfacial layer. The emulsifying efficacy of BSA-stabilized HOPEs also displayed a distinct Lips dependency. Varying the BSA-to-Lips ratio transformed their consistency from flowing to semi-solid, reinforcing the gel network. Under optimal conditions (BSA: Lips = 1:1), the droplet size of BSA-Lips stabilized HOPEs reached a minimum with a highly uniform distribution. Moreover, a 1:1 BSA to Lips ensured outstanding storage, thermal, and centrifugal stability for the HOPEs. This work provides valuable references for the interaction between protein and Lips, guiding the development of highly stable HOPEs stabilizers.
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Affiliation(s)
- Yang Chen
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Xiangzhou Yi
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Zhisheng Pei
- School of Food Science and Engineering, Hainan University, Haikou 570228, China; College of Food Science and Technology, Hainan Tropical Ocean University, Sanya 572022, China
| | - Xuan Zhang
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Xia Gao
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Weimin Zhang
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Xuanri Shen
- School of Food Science and Engineering, Hainan University, Haikou 570228, China; College of Food Science and Technology, Hainan Tropical Ocean University, Sanya 572022, China.
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5
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Olsmats E, Rennie AR. Pea protein [Pisum sativum] as stabilizer for oil/water emulsions. Adv Colloid Interface Sci 2024; 326:103123. [PMID: 38502971 DOI: 10.1016/j.cis.2024.103123] [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: 11/16/2023] [Revised: 03/04/2024] [Accepted: 03/04/2024] [Indexed: 03/21/2024]
Abstract
A map of stability for various water/oil/pea protein compositions has been plotted from the numerous reported results. Two clear regions of stability were identified. High internal oil phase emulsions with 70-80%, v/v oil content stabilized by total pea protein concentration <2.5%, w/v showed stability. Low oil content of 10-30%, v/v for a range of total pea protein concentrations >0.5%, w/v have also been identified as stable. Intermediate oil content and pea protein concentrations >4% w/v are unexplored regions and are likely to be areas of fruitful future research. The wide range of stability suggests that different stabilization mechanisms could be important for different compositions and careful consideration has to be taken to avoid oversimplification. Both stabilization with particles, i.e. Pickering emulsions, and protein unfolding have been suggested as mechanisms. The diverse way of describing stability makes it difficult to intercompare results in different studies. A summary of different oil types used have been presented and several properties such as dynamic viscosity, density, the dielectric constant and interfacial tension have been summarized for common vegetable oils. The type of vegetable oil and emulsion preparation techniques were seen to have rather little effect on emulsion stability. However, the different extraction methods and processing of the pea material had more effect, which could be attributed to changing composition of different proteins and to the states of aggregation and denaturing. Careful consideration has to be taken in the choice of extraction method and an increased understanding of what contributes to the stability is desirable for further progress in research and eventual product formulation.
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Affiliation(s)
- Eleonora Olsmats
- Macromolecular Chemistry, Department of Chemistry - Ångström, Uppsala University, Box 538, 75121 Uppsala, Sweden.
| | - Adrian R Rennie
- Macromolecular Chemistry, Department of Chemistry - Ångström, Uppsala University, Box 538, 75121 Uppsala, Sweden.
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6
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Grasberger K, Hammershøj M, Corredig M. Lupin protein-stabilized oil droplets contribute to structuring whey protein emulsion-filled gels. Food Res Int 2024; 178:113987. [PMID: 38309923 DOI: 10.1016/j.foodres.2024.113987] [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: 09/22/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 02/05/2024]
Abstract
This work aimed to understand the role of lupin protein or mixed lupin-whey protein stabilized oil droplets on the texture and microstructure of a heat-induced whey protein gel. Protein-stabilized emulsions were compared to surfactant-stabilized emulsions to investigate the potential of their interfacial interactions to impart unique structures in the filled gels. The structure development was followed in situ using rheology and the final heat-induced gels were characterized by small and large amplitude oscillatory rheology and confocal microscopy. The development of the gel modulus as well as the final gel properties were linked to the type of interactions between the whey protein matrix and the protein adsorbed at the oil interface. The final gels were selectively dissolved in various buffers, and the results showed that replacing interfacial whey protein with lupin protein resulted in a reduced amount of disulfide bridges, explaining the softer gel in the lupin containing gels compared to those with whey protein. Non-covalent interactions were the main forces involved in the formation of actively filled droplets in the gel network. This work demonstrated that by modulating the interfacial composition of the oil droplets, differing gel structures could be achieved due to differences in the protein-protein interactions between the continuous and the interfacial phase. There is therefore potential for the development of innovative products using lupin-whey protein mixtures, by careful control of the processing steps and the matrix composition.
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Affiliation(s)
- Katherine Grasberger
- Department of Food Science, CiFood Center for Innovative Foods, Aarhus University, Aarhus, Denmark.
| | - Marianne Hammershøj
- Department of Food Science, CiFood Center for Innovative Foods, Aarhus University, Aarhus, Denmark
| | - Milena Corredig
- Department of Food Science, CiFood Center for Innovative Foods, Aarhus University, Aarhus, Denmark.
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7
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Ma L, Yang X, Yang X, Lu S, Zhang H, Fan Y. Stability protection of lutein emulsions by utilizing a functional conjugate of collagen and Lycium barbarum L. leaf flavonoid. Food Res Int 2024; 176:113775. [PMID: 38163700 DOI: 10.1016/j.foodres.2023.113775] [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: 08/18/2023] [Revised: 11/09/2023] [Accepted: 11/22/2023] [Indexed: 01/03/2024]
Abstract
Lutein exhibits excellent functional activity making it useful in many fields. Nevertheless, its use is limited by its physical and chemical instability. Here, collagen and Lycium barbarum L. leaf flavonoids (LBLF) were used as emulsifiers, their structures were characterized, the properties of the complexes were evaluated, and their stabilizing effects on lutein emulsions were explored. According to the results, the encapsulation rate of the complex of collagen-LBLF was (68.67 ± 1.43) % and the drug loading was (6.92 ± 0.13) %. Collagen compounded LBLF with a changed structure and morphology, resulting in improved antioxidant capacity, better foaming and emulsification, and reduced hydrophobicity. In addition, the thiobarbituric acid value of collagen-LBLF stabilized lutein emulsion (0.0012 ± 0.00011) mg/kg was significantly lower than that of collagen stabilized lutein emulsion (0.0021 ± 0.00016) mg/kg (P < 0.05), indicating that the composite stabilized lutein emulsion obtained higher stability. LBLF contributed a high free radical scavenging effect and inhibited lutein degradation during storage. During simulated digestion, collagen-LBLF effectively stabilized the emulsion and protected lutein from destruction, made it release more slowly, and benefited the bio-accessibility of lutein during the next utilization step. Based on the present study, improved storage and digestion stabilities of lutein wereachievedby the utilization of collagen-LBLF complex, which provides a new method for the preparation and application of composite functional emulsifiers.
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Affiliation(s)
- Li Ma
- School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
| | - Xiaohua Yang
- School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
| | - Xue Yang
- School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
| | - Shun Lu
- School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
| | - Huiling Zhang
- School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
| | - Yanli Fan
- School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
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8
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Zhang H, Zhang W, Xu X, Zhao X. Aggregate Size Modulates the Oil/Water Interfacial Behavior of Myofibrillar Proteins: Toward the Thicker Interface Film and Disulfide Bond. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17782-17797. [PMID: 38033267 DOI: 10.1021/acs.langmuir.3c02394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Myofibrillar protein (MP) aggregate models have been established to elucidate the correlation between their aggregate sizes and interfacial properties. The interfacial layer thickness was measured by the polystyrene latex method and quartz crystal microbalance with dissipation measurement. Interfacial conformations were then characterized in situ (front-surface fluorescence spectroscopy) and ex situ (reactive sulfhydryl group and secondary structure measurement following MP displacement). The viscoelasticity of the interfacial film and its resistance to surfactant-induced competitive displacement were reflected by the dilatational rheology and dynamic interfacial tension with the bulk phase exchange. Finally, we compared the findings of competitive displacement before/after adding a sulfhydryl-blocking agent, N-ethylmaleimide, to highlight the role of S-S linkage on interfacial film formation and stability. We substantiated that the aggregate size of the MP governed their interfacial properties. Small-sized aggregates exhibited more ordered secondary structures on the oil-water interface, which was conducive to the adsorption ratio of the protein and the adsorption dynamics. Although larger aggregates lowered the diffusion rate during interfacial film formation, they allowed the thicker and more viscoelastic interfacial film to be constructed afterward through more disulfide bond formation, resulting in greater resistance to surfactant-induced competitive displacement.
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Affiliation(s)
- Haozhen Zhang
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Ministry of Education; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control; College of Food Science and Technology; Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Weiyi Zhang
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Ministry of Education; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control; College of Food Science and Technology; Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Xinglian Xu
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Ministry of Education; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control; College of Food Science and Technology; Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Xue Zhao
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Ministry of Education; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control; College of Food Science and Technology; Nanjing Agricultural University, Nanjing 210095, P. R. China
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9
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Coffee melanoidins as emulsion stabilizers. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Cai Z, Wei Y, Shi A, Zhong J, Rao P, Wang Q, Zhang H. Correlation between interfacial layer properties and physical stability of food emulsions: current trends, challenges, strategies, and further perspectives. Adv Colloid Interface Sci 2023; 313:102863. [PMID: 36868168 DOI: 10.1016/j.cis.2023.102863] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 03/02/2023]
Abstract
Emulsions are thermodynamically unstable systems that tend to separate into two immiscible phases over time. The interfacial layer formed by the emulsifiers adsorbed at the oil-water interface plays an important role in the emulsion stability. The interfacial layer properties of emulsion droplets have been considered the cutting-in points that influence emulsion stability, a traditional motif of physical chemistry and colloid chemistry of particular significance in relation to the food science and technology sector. Although many attempts have shown that high interfacial viscoelasticity may contribute to long-term emulsion stability, a universal relationship for all cases between the interfacial layer features at the microscopic scale and the bulk physical stability of the emulsion at the macroscopic scale remains to be established. Not only that, but integrating the cognition from different scales of emulsions and establishing a unified single model to fill the gap in awareness between scales also remain challenging. In this review, we present a comprehensive overview of recent progress in the general science of emulsion stability with a peculiar focus on interfacial layer characteristics in relation to the formation and stabilization of food emulsions, where the natural origin and edible safety of emulsifiers and stabilizers are highly requested. This review begins with a general overview of the construction and destruction of interfacial layers in emulsions to highlight the most important physicochemical characteristics of interfacial layers (formation kinetics, surface load, interactions among adsorbed emulsifiers, thickness and structure, and shear and dilatational rheology), and their roles in controlling emulsion stability. Subsequently, the structural effects of a series of typically dietary emulsifiers (small-molecule surfactants,proteins, polysaccharides, protein-polysaccharide complexes, and particles) on oil-water interfaces in food emulsions are emphasized. Finally, the main protocols developed for modifying the structural characteristics of adsorbed emulsifiers at multiple scales and improving the stability of emulsions are highlighted. Overall, this paper aims to comprehensively study the literature findings in the past decade and find out the commonality of multi-scale structures of emulsifiers, so as to deeply understand the common characteristics and emulsification stability behaviour of adsorption emulsifiers with different interfacial layer structures. It is difficult to say that there has been significant progress in the underlying principles and technologies in the general science of emulsion stability over the last decade or two. However, the correlation between interfacial layer properties and physical stability of food emulsions promotes revealing the role of interfacial rheological properties in emulsion stability, providing guidance on controlling the bulk properties by tuning the interfacial layer functionality.
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Affiliation(s)
- Zhixiang Cai
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yue Wei
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Aimin Shi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, P.O. Box 5109, Beijing 100193, China
| | - Jian Zhong
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Pingfan Rao
- Food Nutrition Sciences Centre, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Qiang Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, P.O. Box 5109, Beijing 100193, China.
| | - Hongbin Zhang
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China..
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11
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Wu Y, Li W, Zhu H, Martin GJO, Ashokkumar M. Ultrasound-enhanced interfacial adsorption and inactivation of soy trypsin inhibitors. ULTRASONICS SONOCHEMISTRY 2023; 94:106315. [PMID: 36738694 PMCID: PMC9932488 DOI: 10.1016/j.ultsonch.2023.106315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/24/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
In this study, liquid-liquid interfacial protein adsorption was proposed as a means of inactivating soy trypsin inhibitors (TIs, including Kunitz (KTI) and Bowman-Birk inhibitor (BBI)). Hexane-water was first selected as a model system to compare three emulsification methods (hand shaking, rotor-stator and ultrasound mixing). Ultrasound could generate the smallest and least polydisperse emulsion droplets, resulting in highest interfacial adsorption amount of KTI and BBI as well as the highest inactivation percentage of TIs (p < 0.05). Therefore, ultrasound was selected to further explore the effect of the non-aqueous phase on interfacial adsorption and inactivation kinetics of TIs in a food emulsion system containing vegetable oil (VTO). The adsorption amounts of KTI and BBI in the VTO-aqueous emulsion increased by ∼ 25 % compared to the hexane-aqueous emulsion. In addition, the adsorption amounts of KTI and BBI were rapidly increased as a function of sonication time, especially for the hexane-aqueous emulsion system. This result suggests that such inactivation of TIs could be implemented in continuous systems for large-scale processing. Finally, the pathways of interface-induced inactivation of BBI and KTI were investigated based on separate experiments on individual BBI and KTI systems. The results showed that the interface adsorption caused the changes in the secondary and tertiary structure of KTI that led to its activitation. However, BBI was quite stable at the liquid-liquid interface without significant conformational change. Overall, ultrasound-assisted interfacial adsorption can be considered a rapid and highly efficient method to inactivate KTI.
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Affiliation(s)
- Yue Wu
- Sonochemistry Group, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Wu Li
- Algal Processing Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Haiyan Zhu
- Sonochemistry Group, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Gregory J O Martin
- Algal Processing Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Muthupandian Ashokkumar
- Sonochemistry Group, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia.
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12
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Stability and viscoelastic properties of mixed lupin-whey protein at oil-water interfaces depend on mixing sequence. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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13
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Behavior of mixed pea-whey protein at interfaces and in bulk oil-in-water emulsions. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Zhang M, Fan L, Liu Y, Huang S, Li J. Effects of proteins on emulsion stability: The role of proteins at the oil-water interface. Food Chem 2022; 397:133726. [PMID: 35908463 DOI: 10.1016/j.foodchem.2022.133726] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/26/2022] [Accepted: 07/14/2022] [Indexed: 11/15/2022]
Abstract
To obtain a stable protein-added emulsion system, researchers have focused on the design of the oil-water interface. This review discussed the updated details of protein adsorption behavior at the oil-water interface. We evaluated methods of monitoring interfacial proteins as well as their strengths and limitations. Based on the effects of structure on protein adsorption, we summarized the contribution of pre-changing methods to adsorption. In addition, the interaction of proteins and other surface-active molecules at the interface had been emphasized. Results showed that protein adsorption is affected by conformation, oil polarity and aqueous environments. The monitoring of interfacial proteins through spectroscopic properties in actual emulsion systems is an emerging trend. Pre-changing could improve the protein adsorption and the purpose of pre-changing of proteins is similar. In the interaction with other surface-active molecules, co-adsorption is desirable. By co-adsorption, the respective advantages can be exploited to obtain a more stable emulsion system.
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Affiliation(s)
- Mi Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Liuping Fan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yuanfa Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Shengquan Huang
- Nuspower Greatsun (Guangdong) Biotechnology Co., Ltd., Guangzhou 510931, China
| | - Jinwei Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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15
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Beyond particle stabilization of emulsions and foams: Proteins in liquid-liquida and liquid-gas interfaces. Adv Colloid Interface Sci 2022; 308:102743. [DOI: 10.1016/j.cis.2022.102743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 07/04/2022] [Accepted: 07/15/2022] [Indexed: 01/02/2023]
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16
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Sequential adsorption of whey proteins and low methoxy pectin at the oil-water interface: An interfacial rheology study. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107570] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Zhang W, Xu X, Zhao X, Zhou G. Insight into the oil polarity impact on interfacial properties of myofibrillar protein. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107563] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Hinderink EB, Meinders MB, Miller R, Sagis L, Schroën K, Berton-Carabin CC. Interfacial protein-protein displacement at fluid interfaces. Adv Colloid Interface Sci 2022; 305:102691. [PMID: 35533557 DOI: 10.1016/j.cis.2022.102691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/24/2022] [Accepted: 04/30/2022] [Indexed: 11/01/2022]
Abstract
Protein blends are used to stabilise many traditional and emerging emulsion products, resulting in complex, non-equilibrated interfacial structures. The interface composition just after emulsification is dependent on the competitive adsorption between proteins. Over time, non-adsorbed proteins are capable of displacing the initially adsorbed ones. Such rearrangements are important to consider, since the integrity of the interfacial film could be compromised after partial displacement, which may result in the physical destabilisation of emulsions. In the present review, we critically describe various experimental techniques to assess the interfacial composition, properties and mechanisms of protein displacement. The type of information that can be obtained from the different techniques is described, from which we comment on their suitability for displacement studies. Comparative studies between model interfaces and emulsions allow for evaluating the impact of minor components and the different fluid dynamics during interface formation. We extensively discuss available mechanistic physical models that describe interfacial properties and the dynamics of complex mixed systems, with a focus on protein in-plane and bulk-interface interactions. The potential of Brownian dynamic simulations to describe the parameters that govern interfacial displacement is also addressed. This review thus provides ample information for characterising the interfacial properties over time in protein blend-stabilised emulsions, based on both experimental and modelling approaches.
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19
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Cao W, Gao R, Wan X, He Z, Chen J, Wang Y, Hu W, Li J, Li W. Effects of globular and flexible structures on the emulsifying and interfacial properties of mixed soy proteins. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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20
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Kim W, Wang Y, Selomulya C. Impact of sodium alginate on binary whey/pea protein-stabilised emulsions. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.110978] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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21
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An optimized approach to recovering O/W interfacial myofibrillar protein: Emphasizing on interface-induced structural changes. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Lu J, Xu X, Zhao X. Interfacial rheology of alkali pH-shifted myofibrillar protein at O/W interface and impact of Tween 20 displacement. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107275] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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23
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Effect of ionic strength on the sequential adsorption of whey proteins and low methoxy pectin on a hydrophobic surface: A QCM-D study. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107074] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Interfacial behavior of plant proteins — novel sources and extraction methods. Curr Opin Colloid Interface Sci 2021. [DOI: 10.1016/j.cocis.2021.101499] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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Hinderink EB, Boire A, Renard D, Riaublanc A, Sagis LM, Schroën K, Bouhallab S, Famelart MH, Gagnaire V, Guyomarc'h F, Berton-Carabin CC. Combining plant and dairy proteins in food colloid design. Curr Opin Colloid Interface Sci 2021. [DOI: 10.1016/j.cocis.2021.101507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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26
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Carrera Sánchez C, Rodríguez Patino JM. Contribution of the engineering of tailored interfaces to the formulation of novel food colloids. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106838] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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27
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Hinderink EB, de Ruiter J, de Leeuw J, Schroën K, Sagis LM, Berton-Carabin CC. Early film formation in protein-stabilised emulsions: Insights from a microfluidic approach. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106785] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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