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Wu J, Dai T, Lin R, Niu J, Li Z, Chang Z, Jia C, Zou C, Jiang D, Jin M, Huang J, Gao H. Effect of protein-glutaminase on the texture, rheology, microstructure and sensory properties of skimmed set-type yoghurt. Food Chem 2023; 429:136831. [PMID: 37480778 DOI: 10.1016/j.foodchem.2023.136831] [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: 03/09/2023] [Revised: 07/03/2023] [Accepted: 07/05/2023] [Indexed: 07/24/2023]
Abstract
The effects of enzymatic deamidation by protein-glutaminase (PG) on the texture, rheology, microstructure, and sensory properties of skimmed set-type yoghurt were studied. The proportion of small-particle size milk protein micelles (10-50 nm) increased significantly from 0 to 99.39% after PG deamidation. Cryo-SEM results revealed that PG-treated yoghurt had a denser and less open 3D structure. PG was effective at inhibiting post-acidification during storage at 4 ℃. The water holding capacity of PG-treated yoghurt (0.12 U·mL-1) increased by more than 15%. The fluidity and viscosity of yoghurt were significantly improved with increasing PG dose. Sensory evaluation revealed that PG (0.06 U·mL-1) significantly improved the smoothness and creaminess of skimmed set-type yoghurt, which corresponded to the pastiness in texture. In summary, PG can effectively address the problems of post-acidification, gel fracture, and flavors change in skimmed set-type yoghurt, providing new applications for PG in the food industry.
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Affiliation(s)
- Jiajing Wu
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Tian Dai
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Rongyu Lin
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Jinjin Niu
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Zhen Li
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Zhongyi Chang
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Caifeng Jia
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Chunjing Zou
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Deming Jiang
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Mingfei Jin
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Jing Huang
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China.
| | - Hongliang Gao
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China.
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2
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Velazquez-Dominguez A, Hennetier M, Abdallah M, Hiolle M, Violleau F, Delaplace G, De Sa Peixoto P. Influence of enzymatic cross-linking on the apparent viscosity and molecular characteristics of casein micelles at neutral and acidic pH. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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3
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Raak N, Jaros D, Rohm H. Acid-induced gelation of enzymatically cross-linked caseinates: Small and large deformation rheology in relation to water holding capacity and micro-rheological properties. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Bayrak M, Mata J, Raynes JK, Greaves M, White J, Conn CE, Floury J, Logan A. Investigating casein gel structure during gastric digestion using ultra-small and small-angle neutron scattering. J Colloid Interface Sci 2021; 594:561-574. [PMID: 33780761 DOI: 10.1016/j.jcis.2021.03.087] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 02/24/2021] [Accepted: 03/15/2021] [Indexed: 11/25/2022]
Abstract
This study aimed to understand the structural devolution of 10% w/w rennet-induced (RG) and transglutaminase-induced acid (TG) gels in H2O and D2O under in vitro gastric conditions with and without pepsin. The real-time devolution of structure at a nano- (e.g. colloidal calcium phosphate (CCP) and micelle) and micro- (gel network) level was determined using ultra-small (USANS) and small-angle neutron scattering (SANS) with electron microscopy. Results demonstrate that gel firmness or elasticity determines disintegration behaviour during simulated mastication and consequently the particle size entering the stomach. Shear of mixing in the stomach, pH, and enzyme activity will also affect the digestion process. Our results suggest that shear of mixing primarily results in erosion at the particle surface and governs gel disintegration behaviour during the early stages of digestion. Pepsin diffusivity, and hence action, occur more readily in the latter stages of gastric digestion via access to the particle interior. This occurs via the progressively larger pores of the looser gel network and channels created within the larger, less dense casein micelles of the RG gels. Gel firmness and brittleness were greater in the D2O samples compared to H2O, facilitating gel disintegration. Despite the higher strength and elasticity of RG compared to TG, the protein network strands of the RG gels become more compact when exposed to the acidic gastric environment with comparatively larger pores observed through SEM imaging. This led to a higher degree of digestibility in RG gels compared to TG gels. This is the first study to examine casein gel structure during simulated gastric digestion using scattering and highlights the benefits of neutron scattering to monitor structural changes during digestion at multiple length scales.
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Affiliation(s)
- Meltem Bayrak
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia; School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia.
| | - Jitendra Mata
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia.
| | - Jared K Raynes
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia.
| | - Mark Greaves
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia.
| | - Jacinta White
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia.
| | - Charlotte E Conn
- School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia.
| | | | - Amy Logan
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia.
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Size Modulation of Enzymatically Cross-Linked Sodium Caseinate Nanoparticles via Ionic Strength Variation Affects the Properties of Acid-Induced Gels. DAIRY 2021. [DOI: 10.3390/dairy2010014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Enzymatic cross-linking by microbial transglutaminase is a prominent approach to modify the structure and techno-functional properties of food proteins such as casein. However, some of the factors that influence structure-function-interrelations are still unknown. In this study, the size of cross-linked sodium caseinate nanoparticles was modulated by varying the ionic milieu during incubation with the enzyme. As was revealed by size exclusion chromatography, cross-linking at higher ionic strength resulted in larger casein particles. These formed acid-induced gels with higher stiffness and lower susceptibility to forced syneresis compared to those where the same number of ions was added after the cross-linking process. The results show that variations of the ionic milieu during enzymatic cross-linking of casein can be helpful to obtain specific modifications of its molecular structure and certain techno-functional properties. Such knowledge is crucial for the design of protein ingredients with targeted structure and techno-functionality.
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Ono W, Oka D, Tsujii Y, Noguchi T. Dry-heat treatment of skim milk powder improves acid-induced gelation due to protein glycation and cross-linking of caseins. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2021. [DOI: 10.3136/fstr.27.923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Wataru Ono
- Food Processing Technology Center, Faculty of Applied Bioscience, Tokyo University of Agriculture
| | - Daiki Oka
- Department of Agricultural Chemistry, Faculty of Applied Bioscience, Tokyo University of Agriculture
| | - Yoshimasa Tsujii
- Department of Agricultural Chemistry, Faculty of Applied Bioscience, Tokyo University of Agriculture
| | - Tomohiro Noguchi
- Food Processing Technology Center, Faculty of Applied Bioscience, Tokyo University of Agriculture
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7
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Indurkar A, Pandit A, Jain R, Dandekar P. Plant based cross-linkers for tissue engineering applications. J Biomater Appl 2020; 36:76-94. [PMID: 33342347 DOI: 10.1177/0885328220979273] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Utility of plant-based materials in tissue engineering has exponentially increased over the years. Recent efforts in this area have been focused on substituting synthetic cross-linkers with natural ones derived from biological sources. These cross-linkers are essentially derived from the vegetative components of plants therefore suitably categorised as 'green' and renewable materials. Utilization of plant based cross-linkers in scaffolds and hydrogels offers several advantages compared to the synthetic ones. Natural compounds, like ferulic acid and genipin, when incorporated into scaffolds can promote cellular proliferation and growth, by regulation of growth factors. They participate in crucial activities, thus providing impetus for cell growth, function, differentiation and angiogenesis. Several natural compounds inherently possess anti-microbial, antioxidant and anti-inflammatory effects, which enhance the inherent characteristics of the scaffolds. Versatility of natural cross-linkers can be exploited for diverse applications. Integrating such potent molecules can enable the scaffold to display relevant characteristics for each function. This review article focuses on the recent developments with plant based cross-linkers that are employed for scaffold synthesis and their applications, which may be explored to synthesize scaffolds suitable for diverse biomedical applications.
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Affiliation(s)
- Abhishek Indurkar
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
| | - Ashish Pandit
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
| | - Ratnesh Jain
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
| | - Prajakta Dandekar
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
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Hannß M, Böhm W, Drichel S, Henle T. Acid-Induced Gelation of Enzymatically and Nonenzymatically Cross-Linked Caseins-Texture Properties, and Microstructural Insights. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:13970-13981. [PMID: 33147016 DOI: 10.1021/acs.jafc.0c04445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Casein gels consist of a fractal organized network of aggregated casein particles. The gel texture thereby depends on the structure, the spatial distribution, and the interaction forces of the network's elementary building blocks. The aim of this study was to explore the technofunctional consequences of a possible specificity of Maillard reaction-induced cross-linking reactions on casein with respect to texture and microstructure of acid gels. Therefore, sodium caseinate glycated with lactose in the dry state (60 °C, aw 0.5) was compared with casein samples cross-linked with methylglyoxal, with glutaraldehyde, or via microbial transglutaminase, respectively, at similar levels of protein cross-linking as confirmed by size-exclusion chromatography under denaturing conditions. Casein gels prepared by acidification with glucono-δ-lactone were characterized concerning pH kinetics during gelation, mechanical texture properties under large deformation, and water-holding capacity, while viscometric properties of casein suspensions were obtained prior to gelation. The gel microstructure was captured by confocal laser scanning microscopy and evaluated by means of image texture analysis. All protein cross-linking reactions studied led to an enhanced gel strength which was accompanied by an increased interconnectivity of the gel network and a decrease in apparent pore sizes. Gels with more densely packed strands, as was the case for enzymatically modified casein, exhibited pronounced mechanical stability. The spontaneous destabilization of the gel network upon prolonged glycation reactions, which was not obviously displayed by microstructural features but connected to an increased viscosity and pronounced pseudoplastic flow of the unacidified suspension, suggests a limitation of particle rearrangements and the weakening of interparticle protein-protein interactions by additional structure attributes formed during the early Maillard reaction (glycoconjugation).
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Affiliation(s)
- Mariella Hannß
- Chair of Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | - Wendelin Böhm
- Chair of Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | - Sabine Drichel
- 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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9
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Raak N, Rohm H, Jaros D. Enzymatically Cross-Linked Sodium Caseinate as Techno-Functional Ingredient in Acid-Induced Milk Gels. FOOD BIOPROCESS TECH 2020. [DOI: 10.1007/s11947-020-02527-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Concentration-triggered liquid-to-solid transition of sodium caseinate suspensions as a function of temperature and enzymatic cross-linking. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105464] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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11
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Luo K, Liu S, Miao S, Adhikari B, Wang X, Chen J. Effects of transglutaminase pre-crosslinking on salt-induced gelation of soy protein isolate emulsion. J FOOD ENG 2019. [DOI: 10.1016/j.jfoodeng.2019.07.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Hydrolysis by Indigenous Plasmin: Consequences for Enzymatic Cross-Linking and Acid-Induced Gel Formation of Non-Micellar Casein. FOOD BIOPHYS 2019. [DOI: 10.1007/s11483-019-09601-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Raak N, Brehm L, Abbate RA, Henle T, Lederer A, Rohm H, Jaros D. Self-association of casein studied using enzymatic cross-linking at different temperatures. FOOD BIOSCI 2019. [DOI: 10.1016/j.fbio.2019.01.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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14
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Raak N, Schöne C, Rohm H, Jaros D. Acid-induced gelation of enzymatically cross-linked caseinate in different ionic milieus. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.01.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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15
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Li H, Yang C, Chen C, Ren F, Li Y, Mu Z, Wang P. The Use of Trisodium Citrate to Improve the Textural Properties of Acid-Induced, Transglutaminase-Treated Micellar Casein Gels. Molecules 2018; 23:molecules23071632. [PMID: 29973558 PMCID: PMC6100453 DOI: 10.3390/molecules23071632] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 06/30/2018] [Accepted: 07/01/2018] [Indexed: 12/03/2022] Open
Abstract
In this study, the effect of trisodium citrate on the textural properties and microstructure of acid-induced, transglutaminase-treated micellar casein gels was investigated. Various concentrations of trisodium citrate (0 mmol/L, 10 mmol/L, 20 mmol/L, and 30 mmol/L) were added to micellar casein dispersions. After being treated with microbial transglutaminase (mTGase), all dispersions were acidified with 1.3% (w/v) gluconodelta-lactone (GDL) to pH 4.4–4.6. As the concentration of trisodium citrate increased from 0 mmol/L to 30 mmol/L, the firmness and water-holding capacity increased significantly. The final storage modulus (G′) of casein gels was positively related to the concentration of trisodium citrate prior to mTGase treatment of micellar casein dispersions. Cryo-scanning electron microscopy images indicated that more interconnected networks and smaller pores were present in the gels with higher concentrations of trisodium citrate. Overall, when micellar casein dispersions are treated with trisodium citrate prior to mTGase crosslinking, the resulted acid-induced gels are firmer and the syneresis is reduced.
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Affiliation(s)
- Hongliang Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
| | - Chang Yang
- Inner Mongolia Mengniu Dairy (Group) CO., Ltd., Hohhot 750306, China.
| | - Chong Chen
- Key Laboratory of Functional Dairy, Co-Constructed by Ministry of Education and Beijing Government, Beijing 100083, China.
| | - Fazheng Ren
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
| | - Yuan Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
| | - Zhishen Mu
- Inner Mongolia Mengniu Dairy (Group) CO., Ltd., Hohhot 750306, China.
| | - Pengjie Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
- Beijing Laboratory of Food Quality and Safety, Beijing Higher Institution Engineering Research Center of Animal Product, Beijing 100083, China.
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16
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Kizzie-Hayford N, Raak N, Jaros D, Rohm H. Addition of crude tiger nut protein extract affects stiffness of enzymatically cross-linked dairy proteins. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.13770] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Nazir Kizzie-Hayford
- Chair of Food Engineering; Technische Universität Dresden; Dresden 01069 Germany
- Department of Biochemistry; College of Agricultural and Natural Sciences; School of Biological Sciences; University of Cape Coast; Cape Coast Central Region P.O.Box: PMB Ghana
| | - Norbert Raak
- Chair of Food Engineering; Technische Universität Dresden; Dresden 01069 Germany
| | - Doris Jaros
- Chair of Food Engineering; Technische Universität Dresden; Dresden 01069 Germany
| | - Harald Rohm
- Chair of Food Engineering; Technische Universität Dresden; Dresden 01069 Germany
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17
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Chen L, Li Y, Han J, Yuan D, Lu Z, Zhang L. Influence of transglutaminase-induced modification of milk protein concentrate (MPC) on yoghurt texture. Int Dairy J 2018. [DOI: 10.1016/j.idairyj.2017.10.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Size Separation Techniques for the Characterisation of Cross-Linked Casein: A Review of Methods and Their Applications. SEPARATIONS 2018. [DOI: 10.3390/separations5010014] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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19
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Abstract
Consumers' expectations from a dairy product have changed dramatically during the last two decades. People are now more eager to purchase more nutritious dairy foods with improved sensory characteristics. Dairy industry has made many efforts to meet such expectations and numerious production strategies and alternatives have been developed over the years including non-thermal processing, membrane applications, enzymatic modifications of milk components, and so on. Among these novel approaches, transglutaminase (TG)-mediated modifications of milk proteins have become fairly popular and such modifications in dairy proteins offer many advantages to the dairy industry. Since late 1980s, a great number of researches have been done on TG applications in milk and dairy products. Especially, milk proteins-based edible films and gels from milk treated with TG have found many application fields at industrial level. This chapter reviews the characteristics of microbial-origin TG as well as its mode of action and recent developments in TG applications in dairy technology.
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Kizzie-Hayford N, Jaros D, Rohm H. Enrichment of tiger nut milk with microbial transglutaminase cross-linked protein improves the physico-chemical properties of the fermented system. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.03.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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21
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Raak N, Rohm H, Jaros D. Enzymatic Cross-Linking of Casein Facilitates Gel Structure Weakening Induced by Overacidification. FOOD BIOPHYS 2017. [DOI: 10.1007/s11483-017-9483-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Cross-linking with microbial transglutaminase: Isopeptide bonds and polymer size as drivers for acid casein gel stiffness. Int Dairy J 2017. [DOI: 10.1016/j.idairyj.2016.10.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Zavada SR, Battsengel T, Scott TF. Radical-Mediated Enzymatic Polymerizations. Int J Mol Sci 2016; 17:E195. [PMID: 26848652 PMCID: PMC4783929 DOI: 10.3390/ijms17020195] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 01/25/2016] [Accepted: 01/27/2016] [Indexed: 02/04/2023] Open
Abstract
Polymerization reactions are commonly effected by exposing monomer formulations to some initiation stimulus such as elevated temperature, light, or a chemical reactant. Increasingly, these polymerization reactions are mediated by enzymes--catalytic proteins--owing to their reaction efficiency under mild conditions as well as their environmental friendliness. The utilization of enzymes, particularly oxidases and peroxidases, for generating radicals via reduction-oxidation mechanisms is especially common for initiating radical-mediated polymerization reactions, including vinyl chain-growth polymerization, atom transfer radical polymerization, thiol-ene step-growth polymerization, and polymerization via oxidative coupling. While enzyme-mediated polymerization is useful for the production of materials intended for subsequent use, it is especially well-suited for in situ polymerizations, where the polymer is formed in the place where it will be utilized. Such polymerizations are especially useful for biomedical adhesives and for sensing applications.
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Affiliation(s)
- Scott R Zavada
- Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Tsatsral Battsengel
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Timothy F Scott
- Department of Chemical Engineering and Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109, USA.
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