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Pal P, Corpuz AG, Hasan SW, Sillanpää M, Sengupta A, Biddala B, Banat F. Soluble natural sweetener from date palm ( Phoenix dactylifera L.) extract using colloidal gas aphrons generated with a food-grade non-ionic surfactant. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2024; 61:1374-1382. [PMID: 38910918 PMCID: PMC11189850 DOI: 10.1007/s13197-023-05907-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 10/31/2023] [Accepted: 11/27/2023] [Indexed: 06/25/2024]
Abstract
Date palm (Phoenix dactylifera L.) is the most commonly cultivated fruit tree in the Middle East and North Africa. Date fruits are an excellent source of nutrition due to their high sugar content and high levels of phenols, minerals, and antioxidants. This work aimed to prepare a soluble natural sweetener from date fruit extract using colloidal gas aprons (CGAs) generated with a food-grade non-ionic surfactant (Tween 20). Various process parameters, such as the flow rate of the CGAs, the volume of the feed, the temperature of the CGAs, and the feed solution, were varied to obtain the optimal parameters. In the foam phase, the maximum soluble sugar enrichment of 92% was obtained at a flow rate of 50 mL/min of CGA and a solution temperature of 23 °C. The formation of intermolecular hydrogen bonding between the glucose molecules and the surfactant Tween 20 was confirmed by molecular modeling studies. Supplementary Information The online version contains supplementary material available at 10.1007/s13197-023-05907-9.
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Affiliation(s)
- Priyabrata Pal
- Department of Chemical Engineering, Khalifa University of Science and Technology, PO Box: 127788, Abu Dhabi, United Arab Emirates
| | - Aiza G. Corpuz
- Department of Chemical Engineering, Khalifa University of Science and Technology, PO Box: 127788, Abu Dhabi, United Arab Emirates
| | - Shadi W. Hasan
- Department of Chemical Engineering, Khalifa University of Science and Technology, PO Box: 127788, Abu Dhabi, United Arab Emirates
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, PO Box 17011, Doornfontein, 2028 South Africa
| | - Angan Sengupta
- Department of Chemical Engineering, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037 India
- Affiliated to School of Artificial Intelligence and Data Science, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037 India
| | - Bavana Biddala
- Affiliated to School of Artificial Intelligence and Data Science, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037 India
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University of Science and Technology, PO Box: 127788, Abu Dhabi, United Arab Emirates
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Ren H, Wu Y, Shang J, Jin W, Hou D, Hu G, Wang B. Cleaning Oily Sludge Using Colloidal Gas Aphrons: Optimizing Process Conditions and Analyzing Mechanisms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38915238 DOI: 10.1021/acs.langmuir.4c00967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Colloidal gas aphrons (CGAs) are applied in pollutant removal due to their large specific surface area and high surface activity. The structure and properties of the prepared CGAs were investigated in the process of oil removal from oily sludge. The prepared CGAs had a liquid film thickness was 5-10 μm with high stability. CGA interfacial tension was as low as 3.157 mN/m. Then it was found that the oil removal rate of CGAs was higher than that of chemical treatments, showing that CGAs could increase the mass transfer surface area and provide additional attachment sites for pollutants, enhancing the oil removal. The treatment conditions of the oil removal were optimized through response surfaces, showing that under optimal treatment conditions, the oil removal rate of oily sludge reached 96.07%. Additionally, the interaction between surfactant concentration and temperature was the most significant of all of the influencing factors. The behavior and mechanism of CGAs in the cleaning process of oily sludge were further investigated using an inverted fluorescence microscope, SEM, FTIR, and two-dimensional fluorescence spectrometer, showing that pollutants transferred from the liquid film surface of CGAs to the inside the film, and CGAs could specifically adsorb negatively charged organic compounds and aromatic hydrocarbons. The results show that CGAs achieved liquid membrane solubilization. Many negatively charged organic compounds and aromatic hydrocarbons are adsorbed onto the CGAs liquid membrane surface via electrostatic and hydrophobic interactions and then migrated to the hydrophobic layer of the CGAs liquid membrane due to the distribution effect, thus enabling rapid pollutant migration between solid and liquid phases.
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Affiliation(s)
- Hongyang Ren
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
| | - Yongting Wu
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Jiajian Shang
- Exploration Division, China National Petroleum Tarim Oilfield Branch, Korla 841600, P. R. China
| | - Wenhui Jin
- Sichuan Energy Investment Group Co., Ltd, Chengdu 610000, P. R. China
| | - Diya Hou
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Guojun Hu
- Tongwei Solar Co., Ltd, Chengdu 610000, P. R. China
| | - Bing Wang
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
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Pal P, Hasan SW, Abu Haija M, Sillanpää M, Banat F. Colloidal gas aphrons for biotechnology applications: a mini review. Crit Rev Biotechnol 2023; 43:971-981. [PMID: 35968911 DOI: 10.1080/07388551.2022.2092716] [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: 09/14/2021] [Accepted: 05/08/2022] [Indexed: 11/03/2022]
Abstract
Colloidal gas aphrons (CGAs) are highly stable, spherical, micrometer-sized bubbles encapsulated by surfactant multilayers. They have several intriguing properties, including: high stability, large interfacial area, and the ability to maintain the same charge as their parent molecules. The physical properties of CGAs make them ideal for biotechnological applications such as the recovery of a variety of: biomolecules, particularly proteins, yeast, enzymes, and microalgae. In this review, the bio-application of CGAs for the recovery of natural components is presented, as well as: experimental results, technical challenges, and critical research directions for the future. Experimental results from the literature showed that the recovery of biomolecules was mainly determined by electrostatic or hydrophobic interactions between polyphenols and proteins (lysozyme, β-casein, β-lactoglobulin, etc.), yeast, biological molecules (gallic acid and norbixin), and microalgae with CGAs. Knowledge transfer is essential for commercializing CGA-based bio-product recovery, which will be recognized as a viable technology in the future.
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Affiliation(s)
- Priyabrata Pal
- Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Shadi W Hasan
- Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Mohammad Abu Haija
- Department of Chemistry, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Mika Sillanpää
- Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
- Faculty of Science and Technology, School of Applied Physics, University Kebangsaan Malaysia, Bangi, Selangor, Malaysia
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan, Himachal Pradesh, India
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
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Wolanin J, Barré L, Dalmazzone C, Frot D, Jestin J, Perrot H, Bauer D. Insight into Kinetics and Mechanisms of AOT Vesicle Adsorption on Silica in Unfavorable Conditions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1937-1949. [PMID: 32045251 DOI: 10.1021/acs.langmuir.9b03897] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The structure of adsorbed surfactant layers at the equilibrium state has already been investigated using various experimental techniques. However, the comprehension of the formation of structural intermediates in nonequilibrium states and the resulting adsorption kinetics still remain a challenging task. The temporal characterization of these intermediate structures provides further understanding of the layer structure at equilibrium and of the main interactions involved in the adsorption process. In this article, we studied the adsorption kinetics of AOT vesicles on silica at different pHs at ambient temperature. The AOT vesicles were formed in a brine solution. Quartz crystal microbalance with dissipation monitoring (QCM-D) was used to obtain information on the kinetics of surfactant adsorption and on the structure of the adsorbed layer at the equilibrium state. Additionally, neutron reflectivity experiments were performed to provide a detailed description of the mean surfactant concentration profile normal to the surface at equilibrium. Results suggest that vesicles in the bulk influence the adsorption mechanisms. In acidic conditions, after a time-dependent structural rearrangement step, followed by the rupture of initially adsorbed vesicles, the formation of a bilayer was observed. At an intermediate and basic pH, in spite of the electrostatic repulsion between the negatively charged surfactants and silica, results demonstrated the existence of an adsorbed layer composed of AOT vesicles. Vesicles are more or less closely packed depending on the pH of the solution. Results show a non-negligible influence of NaCl addition at pH values where adsorption is initially inhibited. Vesicle adsorption at the intermediate and basic pH is probably due to the combination of attractive van der Waals interactions promoted in high ionic strength systems and the formation of hydrogen bonds. Interpretation of adsorption kinetics gave insight into adsorption mechanisms in an electrostatic repulsion environment.
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Affiliation(s)
- Julie Wolanin
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil Malmaison, France
| | - Loïc Barré
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil Malmaison, France
| | - Christine Dalmazzone
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil Malmaison, France
| | - Didier Frot
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil Malmaison, France
| | - Jacques Jestin
- Laboratoire Léon Brillouin, CNRS-CEA, 91191 Gif-sur-Yvette, France
| | - Hubert Perrot
- Sorbonne Université, CNRS, Laboratoire Interfaces et Systèmes Electrochimiques, LISE, 75005 Paris, France
| | - Daniela Bauer
- IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, 92852 Rueil Malmaison, France
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Zhang J, Di W, Gong P, Lin K, Lyu L, Zhang L, Han X, Ma Y. Direct and fast capture lactoferrin from cheese whey on nanoparticles of Fe3O4 combined with concanavalin A. Food Chem 2019; 274:314-318. [DOI: 10.1016/j.foodchem.2018.08.115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 08/19/2018] [Accepted: 08/24/2018] [Indexed: 11/25/2022]
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Corpuz AG, Pal P, Banat F, Haija MA. Enhanced removal of mixed metal ions from aqueous solutions using flotation by colloidal gas aphrons stabilized with sodium alginate. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.03.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Colloidal Gas Aphrons separation to obtain polyphenol rich fractions from artichoke agro-industrial discards. FOOD AND BIOPRODUCTS PROCESSING 2018. [DOI: 10.1016/j.fbp.2018.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Shariat SZAS, Borzouee F, Mofid MR, Varshosaz J. Immobilization of lactoperoxidase on graphene oxide nanosheets with improved activity and stability. Biotechnol Lett 2018; 40:1343-1353. [PMID: 29915900 DOI: 10.1007/s10529-018-2583-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 05/28/2018] [Indexed: 12/28/2022]
Abstract
OBJECTIVES The purpose of this study was to develop a facile and efficient method to enhance the stability and activity of lactoperoxidase (LPO) by using its immobilization on graphene oxide nanosheets (GO-NS). METHODS Following the LPO purification from bovine whey, it was immobilized onto functionalized GO-NS using glutaraldehyde as cross-linker. Kinetic properties and stability of free and immobilized LPO were investigated. RESULTS LPO was purified 59.13 fold with a specific activity of 5.78 U/mg protein. The successful immobilization of LPO on functionalized GO-NS was confirmed by using dynamic light scattering (DLS) and Fourier transform infrared spectroscopy (FT-IR). The overall results showed that the stability of the immobilized LPO was considerably improved compared to free LPO. Apparent Km and Vmax of LPO also indicated that the immobilized enzyme had greater affinity to the substrate than the native enzyme. CONCLUSIONS Graphene oxide nanosheets are effective means for immobilization of LPO.
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Affiliation(s)
- Seyed Ziyae Aldin Samsam Shariat
- Department of Clinical Biochemistry, Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Esfahān, Iran
| | - Fatemeh Borzouee
- Department of Clinical Biochemistry, Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Esfahān, Iran
| | - Mohammad Reza Mofid
- Department of Clinical Biochemistry, Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Esfahān, Iran
| | - Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Esfahān, Iran.
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Wong FWF, Ariff AB, Abbasiliasi S, Stuckey DC. Recovery of a bacteriocin-like inhibitory substance from Pediococcus acidilactici Kp10 using surfactant precipitation. Food Chem 2017; 232:245-252. [PMID: 28490071 DOI: 10.1016/j.foodchem.2017.03.102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 11/19/2016] [Accepted: 03/18/2017] [Indexed: 12/21/2022]
Abstract
Bacteriocin is an important peptide which can be used as an anti-microbial agent in food. However, simpler and more cost-effective purification methods need to be developed compared to chromatography to enhance its commercial viability. Surfactant precipitation was employed for the first time to purify bacteriocin-like inhibitory substance (BLIS) from a fermentation broth of Pediococcus acidilactici Kp10, and the amount precipitated was investigated as a function of anionic surfactant (AOT) concentration, and pH. Protein recovery from the precipitate was accomplished using solvent extraction, and solvent type, NaCl concentration, and ionic strength of the final solution were optimised. Optimal conditions were; 1.05mM of AOT at pH 4 for precipitation, and acetone extraction (with 1mM NaCl), which resulted in an 86.3% yield, and 53.8 purification factor. This study highlighted the fact that surfactant precipitation can be used as a primary recovery method for BLIS from a complex fermentation broth.
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Affiliation(s)
- Fadzlie Wong Faizal Wong
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom; Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Bioprocessing and Biomanufacturing Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Arbakariya B Ariff
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Bioprocessing and Biomanufacturing Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Sahar Abbasiliasi
- Halal Products Research Institute, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - David C Stuckey
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom.
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Faizal Wong FW, Ariff AB, Stuckey DC. A biocompatible surfactant, methyl ester sulphonate (MES), as a precipitating ligand for protein purification. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.09.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abd El-Salam MH, El-Shibiny S. Separation of Bioactive Whey Proteins and Peptides. INGREDIENTS EXTRACTION BY PHYSICOCHEMICAL METHODS IN FOOD 2017:463-494. [DOI: 10.1016/b978-0-12-811521-3.00012-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Mohammadifard H, Banifatemi SS, Amiri MC. Growing Innovative Calcium Carbonate Morphologies by Utilizing the Colloidal Gas Aphron System as a Surfactant-Based Template Method. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2016.1154852] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | | | - Mohammad C. Amiri
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
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Banifatemi SS, Mohammadifard H, Amiri MC. RETRACTED ARTICLE: Influence of the Disk Diameter and Baffle Position on the Performance of Generated Colloidal Gas Aphrons. J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-015-1750-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sadeghialiabadi H, Amiri M. A new stability index for characterizing the colloidal gas aphrons dispersion. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Molaei A, Waters K. Aphron applications--a review of recent and current research. Adv Colloid Interface Sci 2015; 216:36-54. [PMID: 25578407 DOI: 10.1016/j.cis.2014.12.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 08/07/2014] [Accepted: 12/07/2014] [Indexed: 10/24/2022]
Abstract
Colloidal aphrons are multi-layered stable bubbles (CGAs) or droplets (CLAs), surrounded by a thin surfactant film. The small size of the aphrons creates a system with a high interfacial area which can be pumped like water without collapsing. The high stability of colloidal aphrons due to a thin soapy shell surrounding the core, and high interfacial area make them of interest in many processes such as mineral processing, protein recovery, drilling fluids, separation of organic dyes from waste water, predispersed solvent extraction of dilute streams, clarification and purification of suspensions, soil remediation, material synthesis and immobilization of enzymes. This article aims to provide a comprehensive database in generation, characterization and applications of colloidal gas and liquid aphrons from more than 140 published works so far. The article also reports scale up, industrial applications, technical limitation regarding aphrons application and important future research scopes.
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Mahalingam S, Raimi-Abraham BT, Craig DQM, Edirisinghe M. Formation of protein and protein-gold nanoparticle stabilized microbubbles by pressurized gyration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:659-666. [PMID: 25027827 DOI: 10.1021/la502181g] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A one-pot single-step novel process has been developed to form microbubbles up to 250 μm in diameter using a pressurized rotating device. The microbubble diameter is shown to be a function of rotational speed and working pressure of the processing system, and a modified Rayleigh-Plesset equation has been derived to explain the bubble-forming mechanism. A parametric plot is constructed to identify a rotating speed and working pressure regime, which allows for continuous bubbling. Bare protein (lysozyme) microbubbles generated in this way exhibit a morphological change, resulting in microcapsules over a period of time. Microbubbles prepared with gold nanoparticles at the bubble surface showed greater stability over a time period and retained the same morphology. The functionalization of microbubbles with gold nanoparticles also rendered optical tunability and has promising applications in imaging, biosensing, and diagnostics.
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Affiliation(s)
- Suntharavathanan Mahalingam
- Department of Mechanical Engineering, University College London , Torrington Place, London WC1E 7JE, United Kingdom
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Mahalingam S, Meinders MBJ, Edirisinghe M. Formation, stability, and mechanical properties of bovine serum albumin stabilized air bubbles produced using coaxial electrohydrodynamic atomization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6694-6703. [PMID: 24841724 DOI: 10.1021/la5011715] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bovine serum albumin (BSA) microbubbles were generated using coaxial electrohydrodynamic atomization (CEDHA) using various concentrations of BSA solutions. The bubble characteristics and the long-term stability of the microbubbles were studied through adjustment of processing parameters and the collection media. Bubbles in the range of 40-800 μm were obtained in a controlled fashion, and increasing the flow rate of the BSA solution reduced the polydispersity of the microbubbles. Use of distilled water-glutaraldehyde, glycerol, and glycerol-Tween 80 collection media allowed a remarkable improvement in bubble stability compared to BSA solution collection medium. Possible physical mechanisms were developed to explain the stability of the microbubbles. The collection distance showed a marked influence on stability of the microbubbles. Near-monodisperse particle-reinforced microbubbles were formed with various concentrations of 2,2'-azobis(isobutyramidine) dihydrochloride (AIBA)-polystyrene particle in BSA solution. The bubble size and the size distribution showed negligible change over a period of time irrespective of the concentration of particles at the bubble surface. The compression stiffness of the microbubbles was determined using nanoindentation at ambient temperature and showed that the stiffness of the microbubbles increased from 8 N/m to 20 N/m upon changing the concentration of BSA solution from 5 wt % to 15 wt %.
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Affiliation(s)
- S Mahalingam
- TopInstitute Food and Nutrition (TIFN) , P.O. Box 557, Wageningen, 6700 AN, The Netherlands
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Ismael AB, Hafez SMAE, Mahmoud MB, Elaraby AKA, Hassan HM. Development of New Strategy for Non-Antibiotic Therapy: Dromedary Camel Lactoferrin Has a Potent Antimicrobial and Immunomodulator Effects. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/aid.2013.34034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Post A, Arnold B, Weiss J, Hinrichs J. Effect of temperature and pH on the solubility of caseins: Environmental influences on the dissociation of αS- and β-casein. J Dairy Sci 2012; 95:1603-16. [DOI: 10.3168/jds.2011-4641] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 11/30/2011] [Indexed: 11/19/2022]
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Cheng SI, Stuckey DC. Protein recovery from surfactant precipitation. Biotechnol Prog 2011; 27:1614-22. [DOI: 10.1002/btpr.671] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fractionation and recovery of whey proteins by hydrophobic interaction chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:475-9. [DOI: 10.1016/j.jchromb.2011.01.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 01/03/2011] [Accepted: 01/04/2011] [Indexed: 11/19/2022]
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Nandini KE, Rastogi NK. Integrated Downstream Processing of Lactoperoxidase from Milk Whey Involving Aqueous Two-Phase Extraction and Ultrasound-Assisted Ultrafiltration. Appl Biochem Biotechnol 2010; 163:173-85. [DOI: 10.1007/s12010-010-9026-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Revised: 06/15/2010] [Accepted: 06/25/2010] [Indexed: 11/24/2022]
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Mukhopadhyay G, Khanam J, Nanda A, Sarkar AB. Quantitative Characterization of Bovine Serum Albumin, α-Lactalbumin and β-Lactoglobulin in Commercial Whey Sample by RP-LC. Chromatographia 2010. [DOI: 10.1365/s10337-010-1501-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Nandini K, Rastogi NK. Single step purification of lactoperoxidase from whey involving reverse micelles-assisted extraction and its comparison with reverse micellar extraction. Biotechnol Prog 2010; 26:763-71. [DOI: 10.1002/btpr.383] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Spinelli LS, Neto GR, Freire LF, Monteiro V, Lomba R, Michel R, Lucas E. Synthetic-based aphrons: Correlation between properties and filtrate reduction performance. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.10.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dermiki M, Bourquin AL, Jauregi P. Separation of astaxanthin from cells of Phaffia rhodozyma using colloidal gas aphrons in a flotation column. Biotechnol Prog 2009; 26:477-87. [PMID: 19941328 DOI: 10.1002/btpr.340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The aim of this study is to investigate the separation of astaxanthin from the cells of Phaffia rhodozyma using colloidal gas aphrons (CGA), which are surfactant stabilized microbubbles, in a flotation column. It was reported in previous studies that optimum recoveries are achieved at conditions that favor electrostatic interactions. Therefore, in this study, CGA generated from the cationic surfactant hexadecyl trimethyl ammonium bromide (CTAB) were applied to suspensions of cells pretreated with NaOH. The different operation modes (batch or continuous) and the effect of volumetric ratio of CGA to feed, initial concentration of feed, operating height, and flow rate of CGA on the separation of astaxanthin were investigated. The volumetric ratio was found to have a significant effect on the separation of astaxanthin for both batch and continuous experiments. Additionally, the effect of homogenization of the cells on the purity of the recovered fractions was investigated, showing that the homogenization resulted in increased purity. Moreover, different concentrations of surfactant were used for the generation of CGA for the recovery of astaxanthin on batch mode; it was found that recoveries up to 98% could be achieved using CGA generated from a CTAB solution 0.8 mM, which is below the CTAB critical micellar concentration (CMC). These results offer important information for the scale-up of the separation of astaxanthin from the cells of P. rhodozyma using CGA.
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Affiliation(s)
- Maria Dermiki
- Dept. of Food and Nutritional Sciences, The University of Reading, Whiteknights, Reading RG6 6AP, UK
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Zidehsaraei AZ, Moshkelani M, Amiri M. An innovative simultaneous glucoamylase extraction and recovery using colloidal gas aphrons. Sep Purif Technol 2009. [DOI: 10.1016/j.seppur.2009.02.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dermiki M, Gordon MH, Jauregi P. Recovery of astaxanthin using colloidal gas aphrons (CGA): A mechanistic study. Sep Purif Technol 2009. [DOI: 10.1016/j.seppur.2007.12.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Farook U, Stride E, Edirisinghe MJ. Stability of microbubbles prepared by co-axial electrohydrodynamic atomisation. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2009; 38:713-8. [PMID: 19132365 DOI: 10.1007/s00249-008-0391-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2008] [Revised: 12/03/2008] [Accepted: 12/07/2008] [Indexed: 11/27/2022]
Abstract
Previous studies have indicated that microbubbles prepared by co-axial electrohydrodynamic atomisation (CEHDA) are less stable than those prepared by other methods such as sonication and microfluidic techniques. The aim of this investigation was to determine the reasons for this observation and how this might be addressed in future work. Microbubbles were prepared by CEHDA using (i) a glycerol-air system, (ii) a glycerol-Tween 80-air system and (iii) a glycerol-zirconia-air system and also by simple agitation of (i) and (ii), in order to compare the effect upon the dissolution rate of microbubbles of different materials and processing methods. Both theoretical examination and the experimental results indicated that all three quantities were important in controlling the rate of microbubble dissolution, namely: surface tension at the gas/liquid interface, the effective diffusivity of gas through this interface and the initial concentration of gas dissolved in the surrounding liquid. However, it was the difference in gas concentration in the surrounding liquid that was indicated as the primary reason for the differences in stability observed with different processing methods. It was concluded, therefore, that improved stability could be achieved for microbubbles prepared using CEHDA by saturating the collecting fluid with gas and/or maintaining a high concentration of microbubbles during collection.
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Affiliation(s)
- U Farook
- Department of Mechanical Engineering, University College London, Torrington Place, London, UK
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Xu Q, Nakajima M, Ichikawa S, Nakamura N, Shiina T. A comparative study of microbubble generation by mechanical agitation and sonication. INNOV FOOD SCI EMERG 2008. [DOI: 10.1016/j.ifset.2008.03.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Castelletto V, Krysmann M, Kelarakis A, Jauregi P. Complex Formation of Bovine Serum Albumin with a Poly(ethylene glycol) Lipid Conjugate. Biomacromolecules 2007; 8:2244-9. [PMID: 17585805 DOI: 10.1021/bm070116o] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this work, we report the formation of complexes by self-assembly of bovine serum albumin (BSA) with a poly(ethylene glycol) lipid conjugate (PEG2000-PE) in phosphate saline buffer solution (pH 7.4). Three different sets of samples have been studied. The BSA concentration remained fixed (1, 0.01, or 0.001 wt % BSA) within each set of samples, while the PEG2000-PE concentration was varied. Dynamic light scattering (DLS), rheology, and small-angle X-ray scattering (SAXS) were used to study samples with 1 wt % BSA. DLS showed that BSA/PEG2000-PE aggregates have a size intermediate between a BSA monomer and a PEG2000-PE micelle. Rheology suggested that BSA/PEG2000-PE complexes might be surrounded by a relatively compact PEG-lipid shell, while SAXS results showed that depletion forces do not take an important role in the stabilization of the complexes. Samples containing 0.01 wt % BSA were studied by circular dichroism (CD) and ultraviolet fluorescence spectroscopy (UV). UV results showed that at low concentrations of PEG-lipid, PEG2000-PE binds to tryptophan (Trp) groups in BSA, while at high concentrations of PEG-lipid the Trp groups are exposed to water. CD results showed that changes in Trp environment take place with a minimal variation of the BSA secondary structure elements. Finally, samples containing 0.001 wt % BSA were studied by zeta-potential experiments. Results showed that steric interactions might play an important role in the stabilization of the BSA/PEG2000-PE complexes.
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Affiliation(s)
- Valeria Castelletto
- The University of Reading, Department of Chemistry, Whiteknights, Reading, UK.
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Almécija MC, Ibáñez R, Guadix A, Guadix EM. Effect of pH on the fractionation of whey proteins with a ceramic ultrafiltration membrane. J Memb Sci 2007. [DOI: 10.1016/j.memsci.2006.10.021] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Alves RW, de Souza AAU, de Arruda Guelli Ulson de Souza SM, Jauregi P. Recovery of norbixin from a raw extraction solution of annatto pigments using colloidal gas aphrons (CGAs). Sep Purif Technol 2006. [DOI: 10.1016/j.seppur.2005.07.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fuda E, Bhatia D, Pyle DL, Jauregi P. Selective separation of β-lactoglobulin from sweet whey using CGAs generated from the cationic surfactant CTAB. Biotechnol Bioeng 2005; 90:532-42. [PMID: 15816026 DOI: 10.1002/bit.20412] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The selective separation of whey proteins was studied using colloidal gas aphrons generated from the cationic surfactant cetyl trimethyl ammonium bromide (CTAB). From the titration curves obtained by zeta potential measurements of individual whey proteins, it was expected to selectively adsorb the major whey proteins, i.e., bovine serum albumin, alpha-lactalbumin, and beta-lactoglobulin to the aphrons and elute the remaining proteins (lactoferrin and lactoperoxidase) in the liquid phase. A number of process parameters including pH, ionic strength, and mass ratio of surfactant to protein (M(CTAB)/M(TP)) were varied in order to evaluate their effect on protein separation. Under optimum conditions (2 mmol/l CTAB, M(CTAB)/M(TP) = 0.26-0.35, pH 8, and ionic strength = 0.018 mol/l), 80-90% beta-lactoglobulin was removed from the liquid phase as a precipitate, while about 75% lactoferrin and lactoperoxidase, 80% bovine serum albumin, 95% immunoglobulin, and 65% alpha-lactalbumin were recovered in the liquid fraction. Mechanistic studies using zeta potential measurements and fluorescence spectroscopy proved that electrostatic interactions modulate only partially the selectivity of protein separation, as proteins with similar surface charges do not separate to the same extent between the two phases. The selectivity of recovery of beta-lactoglobulin probably occurs in two steps: the first being the selective interaction of the protein with opposite-charged surfactant molecules by means of electrostatic interactions, which leads to denaturation of the protein and subsequent formation and precipitation of the CTAB-beta-lactoglobulin complex. This is followed by the separation of CTAB-beta-lactoglobulin aggregates from the bulk liquid by flotation in the aphron phase. In this way, CGAs act as carriers which facilitate the removal of protein precipitate.
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Affiliation(s)
- Elisabeth Fuda
- University of Reading, School of Food Biosciences, Whiteknights, P.O. Box 226, Reading, RG6 6AP, United Kingdom
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