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Zhang S, Hao J, Xie Q, Pi X, Peng Z, Sun Y, Cheng J. pH-induced physiochemical and structural changes of milk proteins mixtures and its effect on foaming behavior. Int J Biol Macromol 2024; 254:127838. [PMID: 37923034 DOI: 10.1016/j.ijbiomac.2023.127838] [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: 08/17/2023] [Revised: 10/18/2023] [Accepted: 10/31/2023] [Indexed: 11/07/2023]
Abstract
Milk proteins are well known to produce aerated food due to the amphiphilicity. However, milk proteins are commonly added in blends for the desirable properties in food industry. In this study, the foaming properties of milk protein mixtures (MPM), a mixtures of whey protein isolated (WPI) and milk protein concentrate (MPC), was studied through foaming capacity (FC), foam stability (FS), and foam morphology at pH 3.0-9.0. Physiochemical, structural, surface properties, and Pearson correlation analysis were measured to gain insight into foaming behavior. Results indicated that MPM showed excellent FC (113.0-114.3 %) and FS (90.7-93.0 %) at pH 6.0-9.0, and foam displayed a smaller size and uniform distribution. MPM solutions showed smaller particles, higher solubility, and lower apparent viscosity at pH 6.0-9.0, which resulted in an increase in surface pressure and adsorption rate (Kdiff), facilitating more protein absorbed to interface. To further investigate structural changes, various spectral methods were used, in which the structure of MPM was changed with pH. Correlation analysis further suggests that Kdiff and solubility positively affect the formation of foam, while free sulfhydryl and β-sheet contributed to stabilizing foams. These findings provide valuable information on MPM as ingredients for aerated foods under acidic, neutral, and alkaline conditions.
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Affiliation(s)
- Siyu Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Junli Hao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qinggang Xie
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; HeiLongJiang FeiHe Dairy Co., Ltd., Beijing 100015, China
| | - Xiaowen Pi
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zeyu Peng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yuxue Sun
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Jianjun Cheng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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2
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Lu S, Xiong W, Yao Y, Zhang J, Wang L. Investigating the physicochemical properties and air-water interface adsorption behavior of transglutaminase-crosslinking rapeseed protein isolate. Food Res Int 2023; 174:113505. [PMID: 37986500 DOI: 10.1016/j.foodres.2023.113505] [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: 07/28/2023] [Revised: 09/14/2023] [Accepted: 09/22/2023] [Indexed: 11/22/2023]
Abstract
Improving the technical functionality to adapt to the application of complex food systems is an important challenge for the development of plant protein ingredients. Herein, the correlation between the physicochemical properties and interfacial adsorption behavior of rapeseed protein isolate (RPI) at the air-water interface after transglutaminase (TG) treatment was investigated. The results of cross-linking degree, Fourier transform infrared spectroscopy (FTIR) and sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) showed that the TG enzyme was able to catalyse cross-linking between lysine and glutamine residues of RPI. The foaming capacity of RPI was enhanced from 120 % to 150 % after TG cross-linking 5 h, whereas the average size (210-219 nm) of the RPI determined by dynamic light scattering did not change significantly. Besides, the hydrophobicity tended to increase overall under the enzyme treatment, while the surface electrostatic potential decreased. The former indicates the unfolding of the protein and reduces the kinetic barriers to protein adsorption at the air-water interface, with a consequent increase in disulfide bonding and surface pressure. Furthermore, as the enzyme treatment time increased, a significant increase in protein content of foam by 33.86 %. These findings provide novel insight into the foaming mechanism of TG cross-linking RPI.
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Affiliation(s)
- Shanshan Lu
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing University of Finance and Economics, Nanjing 210023, Jiangsu, China
| | - Wenfei Xiong
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing University of Finance and Economics, Nanjing 210023, Jiangsu, China
| | - Yijun Yao
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing University of Finance and Economics, Nanjing 210023, Jiangsu, China
| | - Jing Zhang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing University of Finance and Economics, Nanjing 210023, Jiangsu, China
| | - Lifeng Wang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing University of Finance and Economics, Nanjing 210023, Jiangsu, China.
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Han F, Shen Q, Zheng W, Zuo J, Zhu X, Li J, Peng C, Li B, Chen Y. The Conformational Changes of Bovine Serum Albumin at the Air/Water Interface: HDX-MS and Interfacial Rheology Analysis. Foods 2023; 12:foods12081601. [PMID: 37107396 PMCID: PMC10137346 DOI: 10.3390/foods12081601] [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: 02/10/2023] [Revised: 04/03/2023] [Accepted: 04/08/2023] [Indexed: 04/29/2023] Open
Abstract
The characterization and dynamics of protein structures upon adsorption at the air/water interface are important for understanding the mechanism of the foamability of proteins. Hydrogen-deuterium exchange, coupled with mass spectrometry (HDX-MS), is an advantageous technique for providing conformational information for proteins. In this work, an air/water interface, HDX-MS, for the adsorbed proteins at the interface was developed. The model protein bovine serum albumin (BSA) was deuterium-labeled at the air/water interface in situ for different predetermined times (10 min and 4 h), and then the resulting mass shifts were analyzed by MS. The results indicated that peptides 54-63, 227-236, and 355-366 of BSA might be involved in the adsorption to the air/water interface. Moreover, the residues L55, H63, R232, A233, L234, K235, A236, R359, and V366 of these peptides might interact with the air/water interface through hydrophobic and electrostatic interactions. Meanwhile, the results showed that conformational changes of peptides 54-63, 227-236, and 355-366 could lead to structural changes in their surrounding peptides, 204-208 and 349-354, which could cause the reduction of the content of helical structures in the rearrangement process of interfacial proteins. Therefore, our air/water interface HDX-MS method could provide new and meaningful insights into the spatial conformational changes of proteins at the air/water interface, which could help us to further understand the mechanism of protein foaming properties.
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Affiliation(s)
- Fei Han
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qian Shen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Zheng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingnan Zuo
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xinyu Zhu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingwen Li
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Chao Peng
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yijie Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China
- Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
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Foaming and Physicochemical Properties of Commercial Protein Ingredients Used for Infant Formula Formulation. Foods 2022; 11:foods11223710. [PMID: 36429303 PMCID: PMC9689407 DOI: 10.3390/foods11223710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 11/22/2022] Open
Abstract
Protein, as one of the main ingredients for infant formula, may be closely related to the undesirable foam formed during the reconstitution of infant formula. Demineralized whey powder (D70 and D90), whey protein concentrate (WPC), and skimmed milk powder (SMP) are the four protein ingredients commonly used in infant formula formulation. The foaming and physicochemical properties of these four protein ingredients from different manufacturers were analyzed in the present study. Significant differences (p < 0.05) in foaming properties were found between the samples from different manufacturers. SMP showed a highest foaming capacity (FC) and foam stability (FS), followed by D70, D90, and WPC. Although the protein composition was similar based on reducing SDS-PAGE, the aggregates varied based on non-reducing SDS-PAGE, probably resulting in the different foaming properties. Particle size, zeta potential, and solubility of the protein ingredients were assessed. The protein structure was evaluated by circular dichroism, surface hydrophobicity, and free sulfhydryl. Pearson’s correlation analysis demonstrated that FC and FS were positively correlated with random coil (0.55 and 0.74), β-turn (0.53 and 0.73), and zeta potential (0.55 and 0.51) but negatively correlated with β-strand (−0.56 and −0.71), free sulfhydryl (−0.56 and −0.63), particle size (−0.45 and −0.53), and fat content (−0.50 and −0.49). The results of this study could provide a theoretical guidance for reducing formation of foam of infant formula products during reconstitution.
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Lajnaf R, Picart-Palmade L, Attia H, Marchesseau S, Ayadi M. Foaming and air-water interfacial properties of camel milk proteins compared to bovine milk proteins. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Shi R, Liu Y, Ma Y, Zhao P, Jiang Z, Hou J. pH-Dependent Binding Behavior of the α-Lactalbumin/Glycyrrhizic Acid Complex in Relation to Their Foaming Characteristics in Bulk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3252-3262. [PMID: 35174703 DOI: 10.1021/acs.jafc.1c04882] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This work aimed to understand the relationships of the interaction mechanism and foaming characteristics of α-lactalbumin (α-La) and glycyrrhizic acid (GA) after acidic (pH 2.5) and neutral (pH 7.0) treatment. The critical aggregation concentration (CAC) of GA in the presence of α-La was 0.6 mM at pH 7.0, while it was 1.0 mM at pH 2.5. Also, in the presence of a GA concentration of 0-15.00 mM, more GA molecules combined onto the α-La surface at pH 2.5 than at pH 7.0, as evident from the binding isotherms. The turbidity and particle size of α-La/GA were greater in acidic solution than those under neutral conditions. This result could be interpreted by the formation of aggregates under higher GA concentration at pH 2.5. Meanwhile, the viscosity of the complex was higher at pH 2.5 than at pH 7.0 in the presence of 3.00-15.00 mM GA, as analyzed from the rheological properties. The foaming ability (FA) of α-La was significantly enhanced in the presence of 10.00 mM GA. Simultaneously, acidic solution could generate a more stable foaming system with a thicker film layer stabilized by the complex compared with neutral solution. These findings could be beneficial for developing a kind of acidic food-grade foaming agent.
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Affiliation(s)
- Ruijie Shi
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Yue Liu
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Yue Ma
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Panpan Zhao
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Zhanmei Jiang
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Juncai Hou
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
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8
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Compositional changes of casein micelles induced by calcium or chelatant addition at threefold and natural casein concentration. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2022.105365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Saha P, Bajaj R, Mann B, Sharma R, Mandal S. Isolation and characterisation of micellar casein from buffalo milk using microfiltration technique with modified buffer composition. INT J DAIRY TECHNOL 2022. [DOI: 10.1111/1471-0307.12844] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Priti Saha
- Dairy Chemistry Division ICAR‐National Dairy Research Institute Karnal Haryana 132001India
| | - Rajesh Bajaj
- Dairy Chemistry Division ICAR‐National Dairy Research Institute Karnal Haryana 132001India
| | - Bimlesh Mann
- Dairy Chemistry Division ICAR‐National Dairy Research Institute Karnal Haryana 132001India
| | - Rajan Sharma
- Dairy Chemistry Division ICAR‐National Dairy Research Institute Karnal Haryana 132001India
| | - Surajit Mandal
- Department of Dairy Microbiology Faculty of Dairy Technology West Bengal University of Animal & Fishery Sciences Mohanpur West Bengal 741246 India
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Reitmaier M, Bachmann I, Heidebrecht HJ, Kulozik U. Effect of changes in ionic composition induced by different diafiltration media on deposited layer properties and separation efficiency in milk protein fractionation by microfiltration. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.105089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Interfacial properties of milk proteins: A review. Adv Colloid Interface Sci 2021; 295:102347. [PMID: 33541692 DOI: 10.1016/j.cis.2020.102347] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 12/22/2022]
Abstract
The interfacial properties of dairy proteins are of great interest to the food industry. Food manufacturing involves various environmental conditions and multiple processes that significantly alter the structure and colloidal stability of food materials. The effects of concentration, pH, heat treatment, addition of salts etc., have considerable influence on the surface activity of proteins and the mechanical properties of the interfacial protein films. Studies to date have established some understanding of the links between environmental and processing related parameters and their impacts on interfacial behavior. Improvement in knowledge may allow better design of interfacial protein structures for different food applications. This review examines the effects of environmental and processing conditions on the interfacial properties of dairy proteins with emphasis on interfacial tension dynamics, dilatational and surface shear rheological properties. The most commonly used surface analytical techniques along with relevant methods are also addressed.
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12
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Ho TM, Bhandari BR, Bansal N. Functionality of bovine milk proteins and other factors in foaming properties of milk: a review. Crit Rev Food Sci Nutr 2021; 62:4800-4820. [PMID: 33527840 DOI: 10.1080/10408398.2021.1879002] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
For many dairy products such as cappuccino-style beverages, the top foam layer determines the overall product quality (e.g. their appearance, texture, mouthfeel and coffee aroma release rate) and the consumer acceptance. Proteins in milk are excellent foaming agents, but the foaming properties of milk are greatly affected by several factors such as the protein content, ratio of caseins to whey proteins, casein micelle size, pH, minerals, proteolysis, presence of low molecular weight compounds (lipids and their hydrolyzed products) and high molecular weight compounds (polysaccharides); milk processing conditions (e.g. homogenization, heat treatment and aging); and foaming method and temperature. These factors either induce changes in the molecular structure, charge and surface activity of the milk proteins; or interfere and/or compete with milk proteins in the formation of highly viscoelastic film to stabilize the foam. Some factors affect the foamability while others determine the foam stability. In this review, functionality of milk proteins in the production and stabilization of liquid foam, under effects of these factors is comprehensively discussed. This will help to control the foaming process of milk on demand for a particular application, which still is difficult and challenging for researchers and the dairy industry.
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Affiliation(s)
- Thao M Ho
- ARC Dairy Innovation Hub, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Bhesh R Bhandari
- ARC Dairy Innovation Hub, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Nidhi Bansal
- ARC Dairy Innovation Hub, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD, Australia
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13
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Reitmaier M, Barbosa B, Sigler S, Heidebrecht HJ, Kulozik U. Impact of different aqueous phases on casein micelles: Kinetics of physicochemical changes under variation of water hardness and diafiltration conditions. Int Dairy J 2020. [DOI: 10.1016/j.idairyj.2020.104776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Dachmann E, Nobis V, Kulozik U, Dombrowski J. Surface and foaming properties of potato proteins: Impact of protein concentration, pH value and ionic strength. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105981] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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15
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Xiong X, Ho MT, Bhandari B, Bansal N. Foaming properties of milk protein dispersions at different protein content and casein to whey protein ratios. Int Dairy J 2020. [DOI: 10.1016/j.idairyj.2020.104758] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Synchrotron micro-CT for studying coarsening in milk protein-stabilized foams in situ. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Effects of high-pressure homogenization and ultrasonic treatment on the structure and characteristics of casein. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109560] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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18
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β-Lactoglobulin Adsorption Layers at the Water/Air Surface: 4. Impact on the Stability of Foam Films and Foams. MINERALS 2020. [DOI: 10.3390/min10070636] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The complexity and high sensitivity of proteins to environmental factors give rise to a multitude of variables, which affect the stabilization mechanisms in protein foams. Interfacial and foaming properties of proteins have been widely studied, but the reported unique effect of pH, which can be of great interest to applications, has been investigated to a lesser extent. In this paper, we focus on the impact of pH on the stability of black foam films and corresponding foams obtained from solutions of a model globular protein—the whey β-lactoglobulin (BLG). Foam stability was analyzed utilizing three characteristic parameters (deviation time, transition time and half-lifetime) for monitoring the foam decay, while foam film stability was measured in terms of the critical disjoining pressure of film rupture. We attempt to explain correlations between the macroscopic properties of a foam system and those of its major building blocks (foam films and interfaces), and thus, to identify structure-property relationships in foam. Good correlations were found between the stabilities of black foam films and foams, while relations to the properties of adsorption layers appeared to be intricate. That is because pH-dependent interfacial properties of proteins usually exhibit an extremum around the isoelectric point (pI), but the stability of BLG foam films increases with increasing pH (3–7), which is well reflected in the foam stability. We discuss the possible reasons behind these intriguingly different behaviors on the basis of pH-induced changes in the molecular properties of BLG, which seem to be determining the mechanism of film rupture at the critical disjoining pressure.
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Weinberger ME, Kulozik U. Effect of low-frequency pulsatile crossflow microfiltration on flux and protein transmission in milk protein fractionation. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1749080] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Maria E. Weinberger
- Chair of Food and Bioprocess Engineering, Technical University of Munich, Freising, Germany
| | - Ulrich Kulozik
- Chair of Food and Bioprocess Engineering, Technical University of Munich, Freising, Germany
- Institute for Food & Health, ZIEL, Freising, Germany
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20
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Ranadheera C, Liyanaarachchi W, Dissanayake M, Chandrapala J, Huppertz T, Vasiljevic T. Impact of shear and pH on properties of casein micelles in milk protein concentrate. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.03.090] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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21
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Fractionation of casein micelles and minor proteins by microfiltration in diafiltration mode. Study of the transmission and yield of the immunoglobulins IgG, IgA and IgM. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2019.01.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Acoustic characterisation of pH dependant reversible micellar casein aggregation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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23
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Zhang Q, Li Y, Wang Z, Qi B, Sui X, Jiang L. Recovery of high value-added protein from enzyme-assisted aqueous extraction (EAE) of soybeans by dead-end ultrafiltration. Food Sci Nutr 2019; 7:858-868. [PMID: 30847164 PMCID: PMC6392832 DOI: 10.1002/fsn3.936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 11/30/2022] Open
Abstract
The skim fraction (SF) obtained from enzyme-assisted aqueous extraction (EAE) of soybeans is a by-product with high protein content of up to 60.67%. As such, it is of great interest to develop an efficient method to recover protein from this fraction. In this study, the potential of dead-end ultrafiltration (UF) in recovering skim protein extracted with different proteases was evaluated. Two polyethersulfone (PES) membranes with molecular weight cutoffs (MWCO) of 3 kDa and 5 kDa were utilized. Results revealed that the membrane with the MWCO of 5 kDa exhibited better filtration efficiency, since higher permeate flux values and lower impurity rejections were observed. Compared with Flavourzyme and Protex 7L, Alcalase 2.4L and Protex 6L exhibited stronger hydrolyzing ability, resulting in higher filtration fluxes but lower protein rejection coefficients. The recovered protein showed comparable amino acid profile to SPC, while with significantly reduced levels of trypsin inhibitors and phytate (p < 0.05), indicating high quality of the recovered protein. Overall, UF can be applicable to recover high value-added protein from EAE of soybeans and remove undesired components from the resulting protein products.
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Affiliation(s)
- Qiaozhi Zhang
- College of Food ScienceNortheast Agricultural UniversityHarbinChina
| | - Yang Li
- College of Food ScienceNortheast Agricultural UniversityHarbinChina
| | - Zhongjiang Wang
- College of Food ScienceNortheast Agricultural UniversityHarbinChina
| | - Baokun Qi
- College of Food ScienceNortheast Agricultural UniversityHarbinChina
| | - Xiaonan Sui
- College of Food ScienceNortheast Agricultural UniversityHarbinChina
| | - Lianzhou Jiang
- College of Food ScienceNortheast Agricultural UniversityHarbinChina
- National Research Center of Soybean Engineering and TechnologyHarbinChina
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24
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Ambros S, Dombrowski J, Boettger D, Kulozik U. Structure-Function-Process Relationship for Microwave Vacuum Drying of Lactic Acid Bacteria in Aerated Matrices. FOOD BIOPROCESS TECH 2018. [DOI: 10.1007/s11947-018-2218-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Salt-dependent interaction behavior of β-Lactoglobulin molecules in relation to their surface and foaming properties. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.09.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Duerasch A, Wissel J, Henle T. Reassembling of Alkali-Treated Casein Micelles by Microbial Transglutaminase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11748-11756. [PMID: 30350984 DOI: 10.1021/acs.jafc.8b04000] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In milk, caseins interact to form nanoparticles called casein micelles. Under weak alkaline conditions, casein micelles swell reversibly and are disrupted at pH values above 8.5. The enzyme microbial transglutaminase (mTG) is widely used in food industry to modify the functional properties of proteins. Here, we evaluated the potential of mTG as a stabilizer for alkaline disrupted casein micelles. Hence, enzymatic cross-linking of casein micelles as well as sodium caseinate was studied at the natural milk pH 6.8 and under alkaline conditions at pH 7.9 by analyzing oligomerization via size exclusion chromatography, monomeric caseins via RP-HPLC-UV, and extra-micellar protein via Bradford assay. Additionally, alkaline swelling as well as enzymatic reconstruction of casein micelles was observed via scanning electron microscopy and dynamic light scattering. The results showed that the extent of cross-linking is mainly influenced by protein conformation and not by pH value. However, micellar αs2-casein was much more cross-linked at pH 7.9 compared to pH 6.8, whereas an opposite tendency was determined for micellar κ-casein. This leads to the conclusion that αs2-casein is mainly located in the inner center of casein micelles and is only accessible for enzymatic cross-linking after alkaline swelling of the micelle. Alkaline disrupted casein micelles are reassembled due to intramicellar cross-linking by mTG. On the basis of the results, an enhanced model of the structure of casein micelles was developed.
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Affiliation(s)
- Anja Duerasch
- Chair of Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Jana Wissel
- Chair of Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Thomas Henle
- Chair of Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
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Zhang R, Pang X, Lu J, Liu L, Zhang S, Lv J. Effect of high intensity ultrasound pretreatment on functional and structural properties of micellar casein concentrates. ULTRASONICS SONOCHEMISTRY 2018; 47:10-16. [PMID: 29908598 DOI: 10.1016/j.ultsonch.2018.04.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/11/2018] [Accepted: 04/21/2018] [Indexed: 05/13/2023]
Abstract
This work investigated the impact of high intensity ultrasound (HIUS) pretreatment on the functional properties and structural characteristics of micellar casein concentrate (MCC). Microfiltered casein protein retentates were treated with HIUS for 0.5, 1, 2, and 5 min prior to spray drying. The results showed that conductivity, solubility, emulsifying, gelling increased significantly as the ultrasonic time prolonged, but the change of pH value were insignificant. In addition, the structural characteristics of MCC for all samples were studied. There was an increase in surface hydrophobicity (Ho) and a reduction in particle size compared with the control (without HIUS pretreatment). The secondary structure of HIUS pretreated MCC samples changed significantly with an increase in β-sheets and random coils and a reduction in α-helix and β-turn. It can be speculated that HIUS pretreatment facilitate the change of functional properties of MCC and these changes would promote its application in food industry.
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Affiliation(s)
- Ruihua Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Quality Inspection Center of Grain and Oil, Tianjin 300171, China
| | - Xiaoyang Pang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jing Lu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Lu Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shuwen Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Jiaping Lv
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Ewert J, Horstmann G, Glück C, Claaßen W, Stressler T, Fischer L. Development and application of a biocatalyst-filter reactor for the continuous production of caseinate hydrolysate surfactants. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Interfacial properties of whey protein foams as influenced by preheating and phenolic binding at neutral pH. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.04.020] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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30
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Understanding of the foam capability of sugar-based nonionic surfactant from molecular level. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Ewert J, Glück C, Zeeb B, Weiss J, Stressler T, Fischer L. Modification of the interfacial properties of sodium caseinate using a commercial peptidase preparation from Geobacillus stearothermophilus. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.02.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chen M, Feijen S, Sala G, Meinders M, van Valenberg H, van Hooijdonk A, van der Linden E. Foam stabilized by large casein micelle aggregates: The effect of aggregate number in foam lamella. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2017.08.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Peng D, Yang J, Li J, Tang C, Li B. Foams Stabilized by β-Lactoglobulin Amyloid Fibrils: Effect of pH. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10658-10665. [PMID: 29135243 DOI: 10.1021/acs.jafc.7b03669] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
β-Lactoglobulin fibrils could serve as a surface-active component and form adsorption layers at the air/water interface. In this study, the physical parameters related to the surface adsorption, foaming, and surface properties of β-lactoglobulin fibrils as a function of pH (2-8) were investigated. Results showed that an increase of pH from 2 to 5 led to a rise of the viscoelastic modulus of the surface adsorption layer and half-life time (t1/2) of foams, but it decreased foamability. When the pH was close to its isoelectric point (5.2), fibrils had the lowest electrostatic repulsion and entangled at the air/water interface resulting in a tightly packaged adsorption layer around bubbles to prevent coalescence and coarsening. When the pH (7-8) was higher than the pI of fibrils, the negatively charged β-lactoglobulin fibrils possessed good foamability (∼80%) and high foam stability (t1/2 ≈ 8 h) simultaneously even at low concentration (1 mg/mL). It demonstrated that β-lactoglobulin fibrils with negative charges presented a good foaming behavior and could be a potential new foaming agent in the food industry.
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Affiliation(s)
- Dengfeng Peng
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Jinchu Yang
- Technology Center, China Tobacco Henan Industrial Company Limited , Zhengzhou, Henan 450000, People's Republic of China
| | - Jing Li
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Cuie Tang
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Bin Li
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
- Functional Food Enginnering & Technology Research Center of Hubei Province , Wuhan, Hubei 430070, People's Republic of China
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Peng D, Jin W, Li J, Xiong W, Pei Y, Wang Y, Li Y, Li B. Adsorption and Distribution of Edible Gliadin Nanoparticles at the Air/Water Interface. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2454-2460. [PMID: 28241119 DOI: 10.1021/acs.jafc.6b05757] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Edible gliadin nanoparticles (GNPs) were fabricated using the anti-solvent method. They possessed unique high foamability and foam stability. An increasing concentration of GNPs accelerated their initial adsorption speed from the bulk phase to the interface and raised the viscoelastic modulus of interfacial films. High foamability (174.2 ± 6.4%) was achieved at the very low concentration of GNPs (1 mg/mL), which was much better than that of ovalbumin and sodium caseinate. Three stages of adsorption kinetics at the air/water interface were characterized. First, they quickly diffused and adsorbed at the interface, resulting in a fast increase of the surface pressure. Then, nanoparticles started to fuse into a film, and finally, the smooth film became a firm and rigid layer to protect bubbles against coalescence and disproportionation. These results explained that GNPs had good foamability and high foam stability simultaneously. That provides GNPs as a potential candidate for new foaming agents applied in edible and biodegradable products.
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Affiliation(s)
- Dengfeng Peng
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Weiping Jin
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
- College of Food Science and Engineering, Wuhan Polytechnic University , Wuhan, Hubei 430023, People's Republic of China
| | - Jing Li
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Wenfei Xiong
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Yaqiong Pei
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Yuntao Wang
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Yan Li
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
- Functional Food Enginnering & Technology Research Center of Hubei Province , Wuhan, Hubei 430070, People's Republic of China
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Dombrowski J, Gschwendtner M, Kulozik U. Evaluation of structural characteristics determining surface and foaming properties of β-lactoglobulin aggregates. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.12.045] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Dombrowski J, Johler F, Warncke M, Kulozik U. Correlation between bulk characteristics of aggregated β-lactoglobulin and its surface and foaming properties. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.05.027] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Dombrowski J, Mattejat C, Kulozik U. Correlation between surface activity and foaming properties of individual milk proteins in dependence of solvent composition. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2016.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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