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Solubilization of concentrated protein dispersion: Effect of hydrogen peroxide (H2O2) and sodium hexametaphosphate (SHMP). Food Chem 2022; 400:133980. [DOI: 10.1016/j.foodchem.2022.133980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 08/03/2022] [Accepted: 08/17/2022] [Indexed: 11/22/2022]
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2
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Chen D, Kuzmenko I, Ilavsky J, Pinho L, Campanella O. Structural evolution during gelation of pea and whey proteins envisaged by time-resolved ultra-small-angle x-ray scattering (USAXS). Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107449] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Sai H, Lau GC, Dannenhoffer AJ, Chin SM, D Ord Ević L, Stupp SI. Imaging Supramolecular Morphogenesis with Confocal Laser Scanning Microscopy at Elevated Temperatures. NANO LETTERS 2020; 20:4234-4241. [PMID: 32383889 DOI: 10.1021/acs.nanolett.0c00662] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The morphogenesis of supramolecular assemblies is a highly dynamic process that has only recently been recognized, and our understanding of this phenomenon will require imaging techniques capable of crossing scales. Shape transformations depend both on the complex energy landscapes of supramolecular systems and the kinetically controlled pathways that define their structures and functions. We report here the use of confocal laser scanning microscopy coupled with a custom-designed variable-temperature sample stage that enables in situ observation of such shape changes. The submicrometer resolution of this technique allows for real-time observation of the nanostructures in the native liquid environments in which they transform with thermal energy. We use this technique to study the temperature-dependent morphogenic behavior of peptide amphiphile nanofibers and photocatalytic chromophore amphiphile nanoribbons. The variable-temperature confocal microscopy technique demonstrated in this work can sample a large volume and provides real-time information on thermally induced morphological changes in the solution.
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Affiliation(s)
- Hiroaki Sai
- Simpson Querrey Institute, Northwestern University, Chicago, Illinois 60611, United States
| | - Garrett C Lau
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Adam J Dannenhoffer
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Stacey M Chin
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Luka D Ord Ević
- Simpson Querrey Institute, Northwestern University, Chicago, Illinois 60611, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, Chicago, Illinois 60611, United States
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Department of Medicine, Northwestern University, Chicago, Illinois 60611, United States
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
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4
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Cubides YTP, Eklund PR, Foegeding EA. Casein as a Modifier of Whey Protein Isolate Gel: Sensory Texture and Rheological Properties. J Food Sci 2019; 84:3399-3410. [PMID: 31750948 DOI: 10.1111/1750-3841.14933] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 09/15/2019] [Accepted: 10/10/2019] [Indexed: 01/22/2023]
Abstract
The objective of this study was to determine if casein could be used to adjust the structure of whey protein gels and alter targeted textural properties. Secondarily, we sought to determine if specific structural and mechanical properties were associated with sensory texture terms. Heat set gels were made from whey proteins alone or combined with casein in micellar or dispersed form at pH 6.0 and 5.5. Replacing the whey protein with casein produced a gel breakdown pattern that was more cohesive during mastication with increased moisture retention. Additionally, casein addition reduced gel strength but minimally altered recoverable energy (an indicator of elasticity). Structural breakdown patterns were shifted from brittle- to ductile-like fracture for gels containing dispersed casein at pH 5.5 or micellar casein at pH 6.0. Shifts in microstructure observed by confocal microscopy could not explain the changes in mechanical or sensory textures. The differentiating sensory attributes among treatments were adhesiveness, cohesiveness of mass, tackiness, firmness, fracturability, and deformability. Most notably, adding casein increased cohesiveness while maintaining water holding properties. Sensory texture properties could be explained by a combination of macroscopic structural changes (appearance), fracture properties, and postfracture breakdown pattern. Overall, it was demonstrated that casein can be used to alter whey protein gel structure such that sensory firmness and fracturability are decreased and cohesiveness is increased, while preventing a large increase in moisture release. PRACTICAL APPLICATION: There is a current desire to use alternative sources of protein in a variety of food applications, which requires the ability to design food structures with specific textural properties. Whey protein gels were used as a model soft solid structure with textural attributes of low cohesiveness and water release, and high firmness and fracturability. It was shown that adding casein modified the structure such that cohesiveness increased, firmness and fracturability decreased, and water holding ability was maintained. Using a second source of protein to modify a primary protein network appears to be a viable way to adjust textural properties.
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Affiliation(s)
| | | | - E Allen Foegeding
- Dept. of Food, Bioprocessing and Nutrition Sciences, North Carolina State Univ., Box 7624, Raleigh, NC, 27695-7624
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Amdursky N, Mazo MM, Thomas MR, Humphrey EJ, Puetzer JL, St-Pierre JP, Skaalure SC, Richardson RM, Terracciano CM, Stevens MM. Elastic serum-albumin based hydrogels: mechanism of formation and application in cardiac tissue engineering. J Mater Chem B 2018; 6:5604-5612. [PMID: 30283632 PMCID: PMC6166857 DOI: 10.1039/c8tb01014e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Hydrogels are promising materials for mimicking the extra-cellular environment. Here, we present a simple methodology for the formation of a free-standing viscoelastic hydrogel from the abundant and low cost protein serum albumin. We show that the mechanical properties of the hydrogel exhibit a complicated behaviour as a function of the weight fraction of the protein component. We further use X-ray scattering to shed light on the mechanism of gelation from the formation of a fibrillary network at low weight fractions to interconnected aggregates at higher weight fractions. Given the match between our hydrogel elasticity and that of the myocardium, we investigated its potential for supporting cardiac cells in vitro. Interestingly, these hydrogels support the formation of several layers of myocytes and significantly promote the maintenance of a native-like gene expression profile compared to those cultured on glass. When confronted with a multicellular ventricular cell preparation, the hydrogels can support macroscopically contracting cardiac-like tissues with a distinct cell arrangement, and form mm-long vascular-like structures. We envisage that our simple approach for the formation of an elastic substrate from an abundant protein makes the hydrogel a compelling biomedical material candidate for a wide range of cell types.
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Affiliation(s)
- Nadav Amdursky
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
| | - Manuel M. Mazo
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
| | - Michael R. Thomas
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
| | - Eleanor J. Humphrey
- National Heart and Lung Institute, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Jennifer L. Puetzer
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
| | - Jean-Philippe St-Pierre
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
| | - Stacey C. Skaalure
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
| | | | - Cesare M. Terracciano
- National Heart and Lung Institute, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Molly M. Stevens
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College Lodon, London, SW7 2AZ, UK
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Ramos OL, Pereira RN, Martins A, Rodrigues R, Fuciños C, Teixeira JA, Pastrana L, Malcata FX, Vicente AA. Design of whey protein nanostructures for incorporation and release of nutraceutical compounds in food. Crit Rev Food Sci Nutr 2017; 57:1377-1393. [PMID: 26065435 DOI: 10.1080/10408398.2014.993749] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Whey proteins are widely used as nutritional and functional ingredients in formulated foods because they are relatively inexpensive, generally recognized as safe (GRAS) ingredient, and possess important biological, physical, and chemical functionalities. Denaturation and aggregation behavior of these proteins is of particular relevance toward manufacture of novel nanostructures with a number of potential uses. When these processes are properly engineered and controlled, whey proteins may be formed into nanohydrogels, nanofibrils, or nanotubes and be used as carrier of bioactive compounds. This review intends to discuss the latest understandings of nanoscale phenomena of whey protein denaturation and aggregation that may contribute for the design of protein nanostructures. Whey protein aggregation and gelation pathways under different processing and environmental conditions such as microwave heating, high voltage, and moderate electrical fields, high pressure, temperature, pH, and ionic strength were critically assessed. Moreover, several potential applications of nanohydrogels, nanofibrils, and nanotubes for controlled release of nutraceutical compounds (e.g. probiotics, vitamins, antioxidants, and peptides) were also included. Controlling the size of protein networks at nanoscale through application of different processing and environmental conditions can open perspectives for development of nanostructures with new or improved functionalities for incorporation and release of nutraceuticals in food matrices.
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Affiliation(s)
- Oscar L Ramos
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal.,b LEPABE-Laboratory of Engineering of Processes, Environment, Biotechnology and Energy, University of Porto, Rua Dr. Roberto Frias , Porto , Portugal
| | - Ricardo N Pereira
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal
| | - Artur Martins
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal
| | - Rui Rodrigues
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal
| | - Clara Fuciños
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal.,c Biotechnology Group , Department of Analytical Chemistry and Food Science , University of Vigo , Ourense , Spain
| | - José A Teixeira
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal
| | - Lorenzo Pastrana
- c Biotechnology Group , Department of Analytical Chemistry and Food Science , University of Vigo , Ourense , Spain
| | - F Xavier Malcata
- b LEPABE-Laboratory of Engineering of Processes, Environment, Biotechnology and Energy, University of Porto, Rua Dr. Roberto Frias , Porto , Portugal.,d Department of Chemical Engineering , Rua Dr. Roberto Frias , Porto , Portugal
| | - António A Vicente
- a CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal
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Lee K, Ko S. Proof-of-concept study of a whey protein isolate based carbon dioxide indicator to measure the shelf-life of packaged foods. Food Sci Biotechnol 2013. [DOI: 10.1007/s10068-014-0015-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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9
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Woo HD, Moon TW, Gunasekaran S, Ko S. Determining the gelation temperature of β-lactoglobulin using in situ microscopic imaging. J Dairy Sci 2013; 96:5565-74. [DOI: 10.3168/jds.2013-6786] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 06/09/2013] [Indexed: 11/19/2022]
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Romero A, Cordobés F, Guerrero A, Puppo MC. Influence of Protein Concentration on the Properties of Crayfish Protein Isolated Gels. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2013. [DOI: 10.1080/10942912.2011.619291] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Alberto Romero
- a Departamento de Ingeniería Química , Facultad de Química, Universidad de Sevilla , Sevilla , Spain
| | - Felipe Cordobés
- a Departamento de Ingeniería Química , Facultad de Química, Universidad de Sevilla , Sevilla , Spain
| | - Antonio Guerrero
- a Departamento de Ingeniería Química , Facultad de Química, Universidad de Sevilla , Sevilla , Spain
| | - María Cecilia Puppo
- b Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA) , Facultad de Ciencias Exactas, Universidad Nacional de la Plata (UNLP), and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) , La Plata , Argentina
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Balakrishnan G, Durand D, Nicolai T. Particle Diffusion in Globular Protein Gels in Relation to the Gel Structure. Biomacromolecules 2010; 12:450-6. [DOI: 10.1021/bm101238r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Dominique Durand
- Polymères, Colloïdes, Interfaces, UMR CNRS Université du Maine, 72085 Le Mans cedex 9, France
| | - Taco Nicolai
- Polymères, Colloïdes, Interfaces, UMR CNRS Université du Maine, 72085 Le Mans cedex 9, France
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