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Stackhouse CI, Pierson KN, Labrecque CL, Mawson C, Berg J, Fuglestad B, Nucci NV. Characterization of 10MAG/LDAO reverse micelles: Understanding versatility for protein encapsulation. Biophys Chem 2024; 311:107269. [PMID: 38815545 DOI: 10.1016/j.bpc.2024.107269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 06/01/2024]
Abstract
Reverse micelles (RMs) are spontaneously organizing nanobubbles composed of an organic solvent, surfactants, and an aqueous phase that can encapsulate biological macromolecules for various biophysical studies. Unlike other RM systems, the 1-decanoyl-rac-glycerol (10MAG) and lauryldimethylamine-N-oxide (LDAO) surfactant system has proven to house proteins with higher stability than other RM mixtures with little sensitivity to the water loading (W0, defined by the ratio of water to surfactant). We investigated this unique property by encapsulating three model proteins - cytochrome c, myoglobin, and flavodoxin - in 10MAG/LDAO RMs and applying a variety of experimental methods to characterize this system's behavior. We found that this surfactant system differs greatly from the traditional, spherical, monodisperse RM population model. 10MAG/LDAO RMs were discovered to be oblate ellipsoids at all conditions, and as W0 was increased, surfactants redistributed to form a greater number of increasingly spherical ellipsoidal particles with pools of more bulk-like water. Proteins distinctively influence the thermodynamics of the mixture, encapsulating at their optimal RM size and driving protein-free RM sizes to scale accordingly. These findings inform the future development of similarly malleable encapsulation systems and build a foundation for application of 10MAG/LDAO RMs to analyze biological and chemical processes under nanoscale confinement.
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Affiliation(s)
- Crystal I Stackhouse
- Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States; Department of Biomedical and Biological Sciences, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States.
| | - Kali N Pierson
- Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States; Department of Biomedical and Biological Sciences, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States.
| | - Courtney L Labrecque
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States.
| | - Cara Mawson
- Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States; Department of Biomedical and Biological Sciences, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States.
| | - Joshua Berg
- Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States; Department of Biomedical and Biological Sciences, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States
| | - Brian Fuglestad
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States; Institute for Structural Biology, Drug Discovery and Development, Virginia Commonwealth University, Richmond, Virginia 23219, United States.
| | - Nathaniel V Nucci
- Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States; Department of Biomedical and Biological Sciences, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028, United States.
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Abd-Elaty DM, Ishak RAH, Osman R, Geneidi AS. Engineering a novel water-in-oil biocompatible microemulsion system for the ocular delivery of dexamethasone sodium phosphate in the treatment of acute uveitis. Int J Pharm 2024; 650:123704. [PMID: 38097148 DOI: 10.1016/j.ijpharm.2023.123704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 12/18/2023]
Abstract
Due to their unique characteristics, microemulsions (ME) represent one of the most promising delivery systems which can conquer poor ocular drug bioavailability providing long residence time. Development of a ME system, relying on the use of a safe and non-irritant surfactant combination derived from sustainable resources and which can consolidate the small ME droplets, is the goal of this work. Herein, we report the design and characterization of a novel biocompatible, eco-friendly ME system loaded with the hydrophilic dexamethasone sodium phosphate (DEXP) using a novel surfactant mixture composed of D-α-tocopherol polyethylene glycol succinate (TPGS) and Plantacare® (coco-Glycosides). Capryol™ PGMC and double-distilled water were used as the respective oil and aqueous phases and the MEs were prepared by the water titration method, suitable for scaling up. Optimization of ME formulae was conducted by varying Plantacare® grades, TPGS to Plantacare® mass ratios and drug loading. The formulae were characterized in terms of physical appearance, droplet size (PS), size distribution (PDI), zeta potential (ZP), and stability. The optimized DEXP-loaded ME formula attained acceptable PS, PDI, and ZP values of 43 ± 5 nm, 0.35 ± 0.07, -12 ± 4 mV, respectively. TEM images confirmed a small PS ≤ 100 nm. The in vivo safety of ME was proved by the Draize test. The ME formula prompted excellent mucoadhesion and transcorneal permeation. The confocal studies showed deep penetration into the rabbits' corneas. In vivo studies using endotoxin-induced uveitis showed high ocular efficacy and a significant reduction in inflammatory cells, including interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). The obtained results elect the novel engineered ME system as a promising tool for the ocular delivery of hydrophilic moieties in the management of various ophthalmic diseases.
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Affiliation(s)
- Dina M Abd-Elaty
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| | - Rania A H Ishak
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt.
| | - Rihab Osman
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| | - Ahmed S Geneidi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
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Ten Klooster S, Takeuchi M, Schroën K, Tuinier R, Joosten R, Friedrich H, Berton-Carabin C. Tiny, yet impactful: Detection and oxidative stability of very small oil droplets in surfactant-stabilized emulsions. J Colloid Interface Sci 2023; 652:1994-2004. [PMID: 37690307 DOI: 10.1016/j.jcis.2023.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/12/2023]
Abstract
HYPOTHESIS The shelf life of multiphase systems, e.g. oil-in-water (O/W) emulsions, is severely limited by physical and/or chemical instabilities, which degrade their texture, macroscopic appearance, sensory and (for edible systems) nutritional quality. One prominent chemical instability is lipid oxidation, which is notoriously complex. The complexity arises from the involvement of many physical structures present at several scales (1-10,000 nm), of which the smallest ones are often overlooked during characterization. EXPERIMENTS We used cryogenic transmission electron microscopy (cryo-TEM) to characterize the coexisting colloidal structures at the nanoscale (10-200 nm) in rapeseed oil-based model emulsions stabilized by different concentrations of a nonionic surfactant. We assessed whether the oxidative and physical instabilities of the smallest colloidal structures in such emulsions may be different from those of larger colloidal structures. FINDINGS By deploying cryo-TEM, we analyzed the size of very small oil droplets and of surfactant micelles, which are typically overlooked by dynamic light scattering when larger structures are concomitantly present. Their size and oil content were shown to be stable over incubation, but lipid oxidation products were overrepresented in these very small droplets. These insights highlight the importance of the fraction of "tiny droplets" for the oxidative stability of O/W emulsions.
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Affiliation(s)
- Sten Ten Klooster
- Laboratory of Food Process engineering, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands.
| | - Machi Takeuchi
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Karin Schroën
- Laboratory of Food Process engineering, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands.
| | - Remco Tuinier
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Rick Joosten
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Center for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Heiner Friedrich
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands; Center for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands.
| | - Claire Berton-Carabin
- Laboratory of Food Process engineering, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands; INRAE, BIA, 44000 Nantes, France.
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D'Agostino C, Preziosi V, Caiazza G, Maiorino MV, Fridjonsson E, Guido S. Effect of surfactant concentration on diffusion and microstructure in water-in-oil emulsions studied by low-field benchtop NMR and optical microscopy. SOFT MATTER 2023; 19:3104-3112. [PMID: 37039250 DOI: 10.1039/d3sm00113j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Emulsions are ubiquitous in many consumer products, including food, cosmetics and pharmaceuticals. Whilst their macroscopic characterisation is well-established, understanding their microscopic behaviour is very challenging. In our previous work we investigated oil-in-water emulsions by studying the effect of water on structuring and dynamics of such systems. In the present work, we investigate the effect of surfactant concentration on microstructure and diffusion within the water-in-oil emulsion system by using low-field pulsed-field gradient (PFG) NMR studies carried out with a benchtop NMR instrument, in conjunction with optical imaging. The results reveal that at high surfactant concentration the formation of smaller droplets gives rise to a third component in the PFG NMR attenuation plot, which is mostly attributed to restricted diffusion near the droplet boundaries. In addition, structuring effects due to increase in surfactant concentration at the boundaries could also contribute to further slowing down water diffusion at the boundaries. As the surfactant concentration decreases, the average droplet size becomes larger and both restriction and structuring effects at the droplet boundaries become less significant, as suggested by the PFG NMR plot, whereby the presence of a third diffusion component becomes less pronounced.
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Affiliation(s)
- Carmine D'Agostino
- Department of Chemical Engineering and Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester, M13 9PL, UK.
- Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali (DICAM), Alma Mater Studiorum - Università di Bologna, Via Terracini, 28, 40131 Bologna, Italy
| | - Valentina Preziosi
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, UdR INSTM, Piazzale Tecchio, 80, 80125, Napoli, Italy.
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Giuseppina Caiazza
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, UdR INSTM, Piazzale Tecchio, 80, 80125, Napoli, Italy.
| | - Maria Vittoria Maiorino
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, UdR INSTM, Piazzale Tecchio, 80, 80125, Napoli, Italy.
| | - Einar Fridjonsson
- Department of Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Stefano Guido
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, UdR INSTM, Piazzale Tecchio, 80, 80125, Napoli, Italy.
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore 486, 80145 Napoli, Italy
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Wang Y, Wang T, Bu S, Zhu J, Wang Y, Zhang R, Hong H, Zhang W, Fan J, Zhi C. Sulfolane-containing aqueous electrolyte solutions for producing efficient ampere-hour-level zinc metal battery pouch cells. Nat Commun 2023; 14:1828. [PMID: 37005392 PMCID: PMC10067964 DOI: 10.1038/s41467-023-37524-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 03/20/2023] [Indexed: 04/04/2023] Open
Abstract
Aqueous zinc metal batteries are appealing candidates for grid energy storage. However, the inadequate electrochemical reversibility of the zinc metal negative electrode inhibits the battery performance at the large-scale cell level. Here, we develop practical ampere-hour-scale aqueous Zn metal battery pouch cells by engineering the electrolyte solution. After identifying the proton reduction as the primary source of H2 evolution during Zn metal electrodeposition, we design an electrolyte solution containing reverse micelle structures where sulfolane molecules constrain water in nanodomains to hinder proton reduction. Furthermore, we develop and validate an electrochemical testing protocol to comprehensively evaluate the cell's coulombic efficiency and zinc metal electrode cycle life. Finally, using the reverse micelle electrolyte, we assemble and test a practical ampere-hour Zn||Zn0.25V2O5•nH2O multi-layer pouch cell capable of delivering an initial energy density of 70 Wh L-1 (based on the volume of the cell components), capacity retention of about 80% after 390 cycles at 56 mA g-1cathode and ~25 °C and prolonged cycling for 5 months at 56 mA g-1cathode and ~25 °C.
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Affiliation(s)
- Yu Wang
- Hong Kong Center for Cerebro-Cardiovascular Health Engineering (COCHE), Hong Kong SAR, Shatin, N. T, 999077, China
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Tairan Wang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Shuyu Bu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Jiaxiong Zhu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Yanbo Wang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Rong Zhang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Hu Hong
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Wenjun Zhang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China
| | - Jun Fan
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China.
| | - Chunyi Zhi
- Hong Kong Center for Cerebro-Cardiovascular Health Engineering (COCHE), Hong Kong SAR, Shatin, N. T, 999077, China.
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, Kowloon, 999077, China.
- Hong Kong Institute for Advanced Study, City University of Hong Kong, Hong Kong, Kowloon, 999077, China.
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Hong Kong, Kowloon, 999077, China.
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An improved method for rapid evaluation of enzymatic cis/trans isomerization of C18:1 monounsaturated fatty acids. Food Chem 2023; 404:134618. [DOI: 10.1016/j.foodchem.2022.134618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 11/05/2022]
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7
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Velasco MI, Iborra A, Giussi JM, Azzaroni O, Acosta RH. Species Distribution in Bicontinuous Phase Systems for Enhanced Oil Recovery Probed by Single-Sided NMR. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15226-15233. [PMID: 36454626 DOI: 10.1021/acs.langmuir.2c02302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Multiphase aqueous-organic systems where a bicontinuous phase is in equilibrium with an excess organic and aqueous phase find various applications in industry. These systems─also known as Winsor III─are complex not only for the different phases that develop therein but also because they are multicomponent systems. In this work, we explore for the first time the use of a benchtop low-field single-sided NMR to determine the species distribution in Winsor III systems. The proposed methodology provides information at macroscopic and microscopic levels. In particular, we show the use of single-sided NMR to determine the phases' dimensions and the species distribution in a polymer-based bicontinuous system. The phases' dimensions and limits can be resolved with micrometric precision and are indicative of the bicontinuous phase stability. The species distribution is determined by means of spatially resolved NMR relaxation and diffusion experiments. It was observed that the salinity of the aqueous phase also impacts the species distribution in the bicontinuous system. Experiments show that the additive and the polymer are mainly located in the bicontinuous phase. As the salinity of the aqueous phase increases, the amount of organic components in the bicontinuous phase decreases as a consequence of the species distribution in the system. This influences the total amount of recovered organic liquid from the organic phase. The information is obtained in a relatively fast experiment and is relevant to the system's possible applications, such as enhanced oil recovery (EOR). This methodology is not only circumscribed to its application in EOR but can also be applied to the study of any emulsion or microemulsion systems without sample size or geometry constraints.
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Affiliation(s)
- Manuel I Velasco
- Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba, CórdobaX5000HUA, Argentina
- CONICET, Instituto de Física Enrique Gaviola (IFEG), CórdobaX5000HUA, Argentina
| | - Agustín Iborra
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900La Plata, Argentina
- YPF Tecnología S.A., Avenida del Petróleo s/n-(Entre 129 y 143) Berisso, Buenos Aires1925, Argentina
| | - Juan M Giussi
- YPF Tecnología S.A., Avenida del Petróleo s/n-(Entre 129 y 143) Berisso, Buenos Aires1925, Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900La Plata, Argentina
| | - Rodolfo H Acosta
- Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba, CórdobaX5000HUA, Argentina
- CONICET, Instituto de Física Enrique Gaviola (IFEG), CórdobaX5000HUA, Argentina
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8
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Klooster ST, Schroën K, Berton-Carabin C. Lipid oxidation products in model food emulsions: do they stay in or leave droplets, that’s the question. Food Chem 2022; 405:134992. [DOI: 10.1016/j.foodchem.2022.134992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/11/2022] [Accepted: 11/15/2022] [Indexed: 11/22/2022]
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9
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Kusova AM, Sitnitsky AE, Uversky VN, Zuev YF. Effect of Protein–Protein Interactions on Translational Diffusion of Spheroidal Proteins. Int J Mol Sci 2022; 23:ijms23169240. [PMID: 36012504 PMCID: PMC9409276 DOI: 10.3390/ijms23169240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/08/2022] [Accepted: 08/14/2022] [Indexed: 11/21/2022] Open
Abstract
One of the commonly accepted approaches to estimate protein–protein interactions (PPI) in aqueous solutions is the analysis of their translational diffusion. The present review article observes a phenomenological approach to analyze PPI effects via concentration dependencies of self- and collective translational diffusion coefficient for several spheroidal proteins derived from the pulsed field gradient NMR (PFG NMR) and dynamic light scattering (DLS), respectively. These proteins are rigid globular α-chymotrypsin (ChTr) and human serum albumin (HSA), and partly disordered α-casein (α-CN) and β-lactoglobulin (β-Lg). The PPI analysis enabled us to reveal the dominance of intermolecular repulsion at low ionic strength of solution (0.003–0.01 M) for all studied proteins. The increase in the ionic strength to 0.1–1.0 M leads to the screening of protein charges, resulting in the decrease of the protein electrostatic potential. The increase of the van der Waals potential for ChTr and α-CN characterizes their propensity towards unstable weak attractive interactions. The decrease of van der Waals interactions for β-Lg is probably associated with the formation of stable oligomers by this protein. The PPI, estimated with the help of interaction potential and idealized spherical molecular geometry, are in good agreement with experimental data.
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Affiliation(s)
- Aleksandra M. Kusova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str., 2/31, 420111 Kazan, Russia
| | - Aleksandr E. Sitnitsky
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str., 2/31, 420111 Kazan, Russia
| | - Vladimir N. Uversky
- Department of Molecular Medicine and Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, 12901 Bruce B. Downs Blvd., MDC07, Tampa, FL 33612, USA
| | - Yuriy F. Zuev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str., 2/31, 420111 Kazan, Russia
- Correspondence: ; Tel.: +7-(843)-2319036
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10
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Arkhipov VP, Arkhipov RV, Petrova EV, Filippov A. Abnormal diffusion behavior and aggregation of oxyethylated alkylphenols in aqueous solutions near their cloud point. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Franconi F, Lemaire L, Gimel JC, Bonnet S, Saulnier P. NMR diffusometry: A new perspective for nanomedicine exploration. J Control Release 2021; 337:155-167. [PMID: 34280413 DOI: 10.1016/j.jconrel.2021.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 12/09/2022]
Abstract
Nuclear Magnetic Resonance (NMR) based diffusion methods open new perspectives for nanomedicine characterization and their bioenvironment interaction understanding. This review summarizes the theoretical background of diffusion phenomena. Self-diffusion and mutual diffusion coefficient notions are featured. Principles, advantages, drawbacks, and key challenges of NMR diffusometry spectroscopic and imaging methods are presented. This review article also gives an overview of representative applicative works to the nanomedicine field that can contribute to elucidate important issues. Examples of in vitro characterizations such as identification of formulated species, process monitoring, drug release follow-up, nanomedicine interactions with biological barriers are presented as well as possible transpositions for studying in vivo nanomedicine fate.
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Affiliation(s)
- Florence Franconi
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France; Univ Angers, PRISM, SFR ICAT, F-49000 Angers, France.
| | - Laurent Lemaire
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France; Univ Angers, PRISM, SFR ICAT, F-49000 Angers, France.
| | | | - Samuel Bonnet
- Univ Angers, PRISM, SFR ICAT, F-49000 Angers, France.
| | - Patrick Saulnier
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France.
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13
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Cimmarusti GM, Shastry A, Boone MN, Cnudde V, Braeckman K, Brooker ADM, Robles ESJ, Britton MM. Characterization of Open-Cell Sponges via Magnetic Resonance and X-ray Tomography. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2187. [PMID: 33923267 PMCID: PMC8123218 DOI: 10.3390/ma14092187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 12/03/2022]
Abstract
The applications of polymeric sponges are varied, ranging from cleaning and filtration to medical applications. The specific properties of polymeric foams, such as pore size and connectivity, are dependent on their constituent materials and production methods. Nuclear magnetic resonance imaging (MRI) and X-ray micro-computed tomography (µCT) offer complementary information about the structure and properties of porous media. In this study, we employed MRI, in combination with µCT, to characterize the structure of polymeric open-cell foam, and to determine how it changes upon compression, µCT was used to identify the morphology of the pores within sponge plugs, extracted from polyurethane open-cell sponges. MRI T2 relaxation maps and bulk T2 relaxation times measurements were performed for 7° dH water contained within the same polyurethane foams used for µCT. Magnetic resonance and µCT measurements were conducted on both uncompressed and 60% compressed sponge plugs. Compression was achieved using a graduated sample holder with plunger. A relationship between the average T2 relaxation time and maximum opening was observed, where smaller maximum openings were found to have a shorter T2 relaxation times. It was also found that upon compression, the average maximum opening of pores decreased. Average pore size ranges of 375-632 ± 1 µm, for uncompressed plugs, and 301-473 ± 1 µm, for compressed plugs, were observed. By determining maximum opening values and T2 relaxation times, it was observed that the pore structure varies between sponges within the same production batch, as well as even with a single sponge.
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Affiliation(s)
| | - Abhishek Shastry
- Centre for X-ray Tomography (UGCT), Ghent University, Proeftuinstraat 86, B-9000 Gent, Belgium; (A.S.); (M.N.B.); (V.C.)
- Department of Physics and Astronomy, Ghent University, B-9000 Gent, Belgium
| | - Matthieu N. Boone
- Centre for X-ray Tomography (UGCT), Ghent University, Proeftuinstraat 86, B-9000 Gent, Belgium; (A.S.); (M.N.B.); (V.C.)
- Department of Physics and Astronomy, Ghent University, B-9000 Gent, Belgium
| | - Veerle Cnudde
- Centre for X-ray Tomography (UGCT), Ghent University, Proeftuinstraat 86, B-9000 Gent, Belgium; (A.S.); (M.N.B.); (V.C.)
- PProGRess, Department of Geology, Ghent University, Krijgslaan 281/S8, B-9000 Ghent, Belgium
- Environmental Hydrogeology, Department of Earth Sciences, Utrecht University, Princetonlaan 8a, 3584 CB Utrecht, The Netherlands
| | - Karl Braeckman
- The Procter and Gamble Company, Brussel Innovation Center, 1853 Strombeek Bever, 100 Temselaan, Belgium;
| | - Anju D. M. Brooker
- The Procter and Gamble Company, Newcastle Innovation Center, Newcastle upon Tyne, Whitley Road, Longbenton NE12 9TS, UK; (A.D.M.B.); (E.S.J.R.)
| | - Eric S. J. Robles
- The Procter and Gamble Company, Newcastle Innovation Center, Newcastle upon Tyne, Whitley Road, Longbenton NE12 9TS, UK; (A.D.M.B.); (E.S.J.R.)
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14
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Wang X, Wang X, Feng T, Shen Y, Xia S. Saltiness perception enhancement of fish meat treated by microwave: The significance of conformational characteristics, water and sodium mobility. Food Chem 2021; 347:129033. [PMID: 33486362 DOI: 10.1016/j.foodchem.2021.129033] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 11/17/2022]
Abstract
A saltiness perception enhancement method of grass carp meat conducted by microwave heating was investigated. Ion chromatographic results demonstrated that all samples had the same sodium level retained in matrices after being treated by water bath (WBV) and microwave with different power of 2.5, 7.5, 10, and 12.5 W/g (MWV). However, the meat treated by microwave exhibited a higher salty intensity than that of WBV, particularly MWV-10 W/g and MWV-12.5 W/g. The enhanced saltiness perception of meat treated by microwave was attributed to the facilitated water and sodium mobility demonstrated by low field-NMR and pulse-field-gradient stimulated echo (PFG-STE) 23Na NMR experiments. Furthermore, the enhancement was also related to the formation of microstructure favorable for sodium diffusion, originating from the insufficient denaturation and less exposure of hydrophobic groups of proteins induced by microwave heating. Therefore, microwave heating has the potential to enhance the saltiness perception of meat in the food industry.
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Affiliation(s)
- Xuejiao Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China; School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China
| | - Xingwei Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China; School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China
| | - Tingting Feng
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China; School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yu Shen
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China
| | - Shuqin Xia
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China; School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, People's Republic of China.
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15
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Shaparenko NO, Kompan'kov NB, Demidova MG, Bulavchenko AI. Structure and conductivity of AOT solutions in n‐hexadecane‐chloroform mixtures. Electrophoresis 2020; 41:1592-1599. [DOI: 10.1002/elps.202000085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/30/2020] [Accepted: 07/22/2020] [Indexed: 11/11/2022]
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16
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Day IJ. Matrix-assisted DOSY. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2020; 116:1-18. [PMID: 32130955 DOI: 10.1016/j.pnmrs.2019.09.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/30/2019] [Accepted: 09/01/2019] [Indexed: 06/10/2023]
Abstract
The analysis of mixtures by NMR spectroscopy is challenging. Diffusion-ordered NMR spectroscopy enables a pseudo-separation of species based on differences in their translational diffusion coefficients. Under the right circumstances, this is a powerful technique; however, when molecules diffuse at similar rates separation in the diffusion dimension can be poor. In addition, spectral overlap also limits resolution and can make interpretation challenging. Matrix-assisted diffusion NMR seeks to improve resolution in the diffusion dimension by utilising the differential interaction of components in the mixture with an additive to the solvent. Tuning these matrix-analyte interactions allows the diffusion resolution to be optimised. This review presents the background to matrix-assisted diffusion experiments, surveys the wide range of matrices employed, including chromatographic stationary phases, surfactants and polymers, and demonstrates the current state of the art.
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Affiliation(s)
- Iain J Day
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QJ, UK.
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17
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Bulavchenko AI, Shaparenko NO, Kompan’kov NB, Popovetskiy PS, Demidova MG, Arymbaeva AT. The formation of free ions and electrophoretic mobility of Ag and Au nanoparticles in n-hexadecane–chloroform mixtures at low concentrations of AOT. Phys Chem Chem Phys 2020; 22:14671-14681. [DOI: 10.1039/d0cp02153a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The electrophoretic mobility of Ag and Au nanoparticles in n-hexadecane–chloroform mixtures was studied as a function of the chloroform content (from 0 to 100 vol%).
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Affiliation(s)
| | - Nikita O. Shaparenko
- Nikolaev Institute of Inorganic Chemistry
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Nikolay B. Kompan’kov
- Nikolaev Institute of Inorganic Chemistry
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Pavel S. Popovetskiy
- Nikolaev Institute of Inorganic Chemistry
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Marina G. Demidova
- Nikolaev Institute of Inorganic Chemistry
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Aida T. Arymbaeva
- Nikolaev Institute of Inorganic Chemistry
- Russian Academy of Sciences
- Novosibirsk
- Russia
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18
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Fuglestad B, Gupta K, Wand AJ, Sharp KA. Water loading driven size, shape, and composition of cetyltrimethylammonium/hexanol/pentane reverse micelles. J Colloid Interface Sci 2019; 540:207-217. [PMID: 30640068 DOI: 10.1016/j.jcis.2019.01.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 01/03/2019] [Accepted: 01/04/2019] [Indexed: 02/06/2023]
Abstract
Cetyltrimethylammonium bromide (CTAB)/hexanol reverse micelles have found a variety of applications that demand control over physical parameters. Water content or loading is among the most basic tunable components and is the major driver of the physical properties of these systems. This study uses small-angle scattering with contrast variation to characterize these systems as a function of water loading. The scattering data were analyzed with a variety of approaches, resulting in converging physical specifications. Equations that describe basic physical parameters were determined that allow for characterization and manipulation of the CTAB/hexanol reverse micelle surfactant system. The shape of the reverse micelles was revealed to be slightly ellipsoidal and varies slightly through the water loading range. The surfactant shell is shown to contain a higher fraction of hexanol upon addition of water. Analysis reveals that the size, shape, and surfactant/cosurfactant composition are directly tunable by variation of the water content and that these properties are consequences of the balance of forces present in the reverse micelles.
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Affiliation(s)
- Brian Fuglestad
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States
| | - Kushol Gupta
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States
| | - A Joshua Wand
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States.
| | - Kim A Sharp
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States.
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19
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Taraban MB, Deredge DJ, Smith ME, Briggs KT, Feng Y, Li Y, Jiang ZX, Wintrode PL, Yu YB. Conformational transition of a non-associative fluorinated amphiphile in aqueous solution. II. Conformational transition vs. supramolecular assembly. RSC Adv 2019; 9:1956-1966. [PMID: 35516151 PMCID: PMC9059749 DOI: 10.1039/c8ra08795d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 01/08/2019] [Indexed: 11/21/2022] Open
Abstract
Unlike many known amphiphiles, the fluorinated amphiphilic dendrimer studied in this work demonstrated a concentration-dependent conformational transition rather than micellization or assembly. Hydrophobic and hydrophilic interactions with water were suggested as the most probable driving force of this transition. This assumption was consistent with the observed 19F chemical shift changes of the dendrimer compared to a known micelle-forming fluorinated amphiphile. Since water is an important factor in the process, trends of the concentration-dependent changes in water proton transverse relaxation rate served as an indicator of structural changes and/or supramolecular assembly. The conformational transition process was also confirmed by ion-mobility mass-spectrometry. We suggested that structural features, namely, steric hindrances, prevented the micellization/assembly of the dendrimer of this study. This conclusion might inform the approach to develop novel unconventional amphiphiles. Conformational transition in non-associative fluorinated dendrimer—a way to novel unconventional amphiphiles.![]()
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Affiliation(s)
- Marc B. Taraban
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
| | - Daniel J. Deredge
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
| | - Margaret E. Smith
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
| | - Katharine T. Briggs
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
| | - Yue Feng
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
| | - Yu Li
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan
- China
| | | | - Patrick L. Wintrode
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
| | - Yihua Bruce Yu
- Department of Pharmaceutical Sciences
- School of Pharmacy
- University of Maryland
- Baltimore
- USA
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20
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Luo Y, Hu H, Wang Y, Hu F, Zhu S, Zhang S, Zhang Y, Li S, Wang J. Phase separation in solvent extraction of copper or nickel from acidic solution using a sulfonic acid (HDNNS) and a carboxylate ester (4PC). J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1485576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yuqing Luo
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Huiping Hu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Yongxi Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Fang Hu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Shan Zhu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Shuaifei Zhang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Ying Zhang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Shengkang Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
| | - Junya Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resource, Central South University, Changsha, Hunan, China
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21
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Reci A, Sederman AJ, Gladden LF. Optimising magnetic resonance sampling patterns for parametric characterisation. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 294:35-43. [PMID: 30005192 DOI: 10.1016/j.jmr.2018.06.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/29/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
Sampling strategies are often central to experimental design. Choosing efficiently which data to acquire can improve the estimation of parameters and reduce the acquisition time. This work is focused on designing optimal sampling patterns for Nuclear Magnetic Resonance (NMR) applications, illustrated with respect to the best estimate of the parameters characterising a lognormal distribution. Lognormal distributions are commonly used as fitting models for distributions of spin-lattice relaxation time constants, spin-spin relaxation time constants and diffusion coefficients. A method for optimising the choice of points to be sampled is presented which is based on the Cramér-Rao Lower Bound (CRLB) theory. The method's capabilities are demonstrated experimentally by applying it to the problem of estimating the emulsion droplet size distribution from a pulsed field gradient (PFG) NMR diffusion experiment. A difference of <5% is observed between the predictions of CRLB theory and the PFG NMR experimental results. It is shown that CLRB theory is stable down to signal-to-noise ratios of ∼10. A sensitivity analysis for the CRLB theory is also performed. The method of optimizing sampling patterns is easily adapted to distributions other than lognormal and to other aspects of experimental design; case studies of optimising the sampling scheme for a fixed acquisition time and determining the potential for reduction in acquisition time for a fixed parameter estimation accuracy are presented. The experimental acquisition time is typically reduced by a factor of 3 using the proposed method compared to a constant gradient increment approach that would usually be used.
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Affiliation(s)
- A Reci
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom
| | - A J Sederman
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom.
| | - L F Gladden
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom
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22
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Awad TS, Asker D, Romsted LS. Evidence of coexisting microemulsion droplets in oil-in-water emulsions revealed by 2D DOSY 1H NMR. J Colloid Interface Sci 2018; 514:83-92. [DOI: 10.1016/j.jcis.2017.12.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/03/2017] [Accepted: 12/04/2017] [Indexed: 12/16/2022]
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23
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Mills AJ, Britton MM. NMR study of the influence of n-alkanol co-surfactants on reverse micelles in quaternary microemulsions of cetyltrimethylammonium bromide (CTAB). MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:425-432. [PMID: 26857914 DOI: 10.1002/mrc.4392] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 10/23/2015] [Accepted: 11/03/2015] [Indexed: 06/05/2023]
Abstract
The effects of different n-alkanol co-surfactants on the size, shape, composition and dynamics of reverse micelles (RMs) in cetyltrimethylammonium bromide (CTAB)/n-alkanol/n-hexane/water and CTAB/n-alkanol/n-pentane/water microemulsions were investigated using T2 relaxation and pulsed gradient stimulated echo nuclear magnetic resonance (NMR) measurements and molecular modelling. NMR T2 relaxation times and diffusion coefficients were determined for the surfactant and co-surfactant in these CTAB quaternary reverse microemulsions, for a range of medium chain length alcohol co-surfactants, from 1-butanol to 1-heptanol. These data revealed a slight RM size dependency on co-surfactant chain length, with RM sizes tending to decrease with increasing alcohol chain length. Molecular modelling of CTAB/n-alkanol/n-hexane/water RMs suggested a variation in RM shape with co-surfactant chain length, where those formed with pentanol were found to be least spherical and those formed with heptanol the most spherical. The NMR data also revealed differences in the behaviour of the micellar structures in the CTAB/n-pentanol/n-hexane/water reverse microemulsion, compared with the other reverse microemulsions in this study, where CTAB was found to be distributed between two environments, which then combined to form larger micelles. The origins of these differences remain unclear. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Amanda J Mills
- School of Chemistry, University of Birmingham, Birmingham, UK
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24
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Koneva A, Safonova E, Kondrakhina P, Vovk M, Lezov A, Chernyshev YS, Smirnova N. Effect of water content on structural and phase behavior of water-in-oil (n-decane) microemulsion system stabilized by mixed nonionic surfactants SPAN 80/TWEEN 80. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.01.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Khan MF, Singh MK, Sen S. Measuring Size, Size Distribution, and Polydispersity of Water-in-Oil Microemulsion Droplets using Fluorescence Correlation Spectroscopy: Comparison to Dynamic Light Scattering. J Phys Chem B 2016; 120:1008-20. [DOI: 10.1021/acs.jpcb.5b09920] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mohammad Firoz Khan
- Spectroscopy Laboratory,
School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Moirangthem Kiran Singh
- Spectroscopy Laboratory,
School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Sobhan Sen
- Spectroscopy Laboratory,
School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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26
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Hande VR, Chakrabarty S. Exploration of the presence of bulk-like water in AOT reverse micelles and water-in-oil nanodroplets: the role of charged interfaces, confinement size and properties of water. Phys Chem Chem Phys 2016; 18:21767-79. [DOI: 10.1039/c6cp04378j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We show that the distance from the interface at which bulk-like properties are recovered strongly depends on the choice of order parameter being probed: translational < tetrahedral ≪ dipolar orientation.
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Affiliation(s)
- Vrushali R. Hande
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
| | - Suman Chakrabarty
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
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27
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Qian Y, Qiu X, Zhong X, Zhang D, Deng Y, Yang D, Zhu S. Lignin Reverse Micelles for UV-Absorbing and High Mechanical Performance Thermoplastics. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03360] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong Qian
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Xueqing Qiu
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Xiaowen Zhong
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Delang Zhang
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Yonghong Deng
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Dongjie Yang
- State Key Lab of
Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Shiping Zhu
- Department
of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
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28
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Zhang PY, Xu ZL, Ma XH, Yang H, Wu WZ, Wei YM, Liu YD. Fabrication and characterization of PVDF hollow fiber membranes employing in-situ self-assembly modulation concept. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.03.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Ma YJ, Yuan XZ, Xin-Peng, Hou-Wang, Huang HJ, Shan-Bao, Huan-Liu, Xiao ZH, Zeng GM. The pseudo-ternary phase diagrams and properties of anionic–nonionic mixed surfactant reverse micellar systems. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.12.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Mills AJ, Wilkie J, Britton MM. NMR and Molecular Dynamics Study of the Size, Shape, and Composition of Reverse Micelles in a Cetyltrimethylammonium Bromide (CTAB)/n-Hexane/Pentanol/Water Microemulsion. J Phys Chem B 2014; 118:10767-75. [DOI: 10.1021/jp504585k] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Amanda J. Mills
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - John Wilkie
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - Melanie M. Britton
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
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31
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Taraban MB, Yu L, Feng Y, Jouravleva EV, Anisimov MA, Jiang ZX, Yu YB. Conformational transition of a non-associative fluorinated amphiphile in aqueous solution. RSC Adv 2014. [DOI: 10.1039/c4ra09752a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A non-associative fluorinated amphiphile was synthesized. Instead of self-association at high concentrations, this amphiphile undergoes conformational transition in which the hydrophilic tails wrap around the fluorocarbon core to shield it from water, bearing certain similarity to protein folding in a crowded environment.
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Affiliation(s)
- Marc B. Taraban
- Department of Pharmaceutical Sciences
- University of Maryland
- Baltimore, USA
| | - Li Yu
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan, China
| | - Yue Feng
- Department of Pharmaceutical Sciences
- University of Maryland
- Baltimore, USA
| | - Elena V. Jouravleva
- Light Scattering Center
- Institute for Physical Science and Technology
- University of Maryland
- College Park
- , USA
| | - Mikhail A. Anisimov
- Light Scattering Center
- Institute for Physical Science and Technology
- University of Maryland
- College Park
- , USA
| | | | - Y. Bruce Yu
- Department of Pharmaceutical Sciences
- University of Maryland
- Baltimore, USA
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32
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Patra A, Luong TQ, Mitra RK, Havenith M. The influence of charge on the structure and dynamics of water encapsulated in reverse micelles. Phys Chem Chem Phys 2014; 16:12875-83. [DOI: 10.1039/c4cp00386a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Chen M, Zhao Y, Yang W, Yin M. UV-irradiation-induced templated/in-situ formation of ultrafine silver/polymer hybrid nanoparticles as antibacterial. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:16018-16024. [PMID: 24308387 DOI: 10.1021/la4041776] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Two types of facile approaches toward ultrafine Ag/polymer hybrid nanoparticles (NPs) within 10 nm are introduced. Template and in-situ formation method are developed by photoreduction based on inverse microemulsion (IME) polymerization of N,N-dimethylacrylamide (DMAA). The template method refers to the usage of size-varied polymeric PDMAA NPs as templates for the preparation of Ag/PDMAA hybrids with desired morphology and optical property. To avoid the self-seeding nucleation of free Ag(+) in the solution, in-situ formation method is developed by introducing AgNO3 during IME polymerization, in which product hybrids could be obtained via autoprecipitation in large scale. Additionally, the produced Ag/PDMAA hybrids show high antibacterial performance.
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Affiliation(s)
- Mengjun Chen
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Beijing University of Chemical Technology , 100029 Beijing, China
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Dielectric relaxation behavior of ternary systems of water/toluene/Triton X-100: the effects of water and oil contents on microemulsion structure. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3095-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Webb EB, Koh CA, Liberatore MW. Rheological properties of methane hydrate slurries formed from AOT + water + oil microemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10997-11004. [PMID: 23924434 DOI: 10.1021/la4022432] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The in situ formation and flow properties of methane hydrates formed from water-in-oil microemulsions composed of water, dodecane, and aerosol OT surfactant (AOT) were studied using a unique high pressure rheometer. AOT microemulsions have high stability (order of months), well-characterized composition, and yield reproducible results compared to hydrate studies in water-in-crude oil emulsions. Viscosity increases on the order of minutes upon hydrate formation, and then decreases on the order of hours. If significant unconverted water remained after the initial formation event, then viscosity increases for a time as methane slowly dissolves and converts additional water to hydrate. In addition to transient formation measurements, yield stresses and flow curves are measured for a set of experimental conditions. Hydrate slurry viscosity and yield stress increase with increasing water volume fraction, increasing initial pressure, decreasing temperature, and decreasing formation shear rate.
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Affiliation(s)
- Eric B Webb
- Center for Hydrate Research, Department of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, USA
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36
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Chen M, Yang W, Yin M. Size-controllable synthesis and functionalization of ultrafine polymeric nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2715-2719. [PMID: 23441018 DOI: 10.1002/smll.201203130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Mengjun Chen
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Beijing University of Chemical Technology, 100029 Beijing, China
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37
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Physicochemical studies of mixed surfactant microemulsions with isopropyl myristate as oil. J Colloid Interface Sci 2013; 402:180-9. [DOI: 10.1016/j.jcis.2013.04.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/04/2013] [Accepted: 04/05/2013] [Indexed: 11/19/2022]
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Martinez AV, Dominguez L, Małolepsza E, Moser A, Ziegler Z, Straub JE. Probing the structure and dynamics of confined water in AOT reverse micelles. J Phys Chem B 2013; 117:7345-51. [PMID: 23687916 DOI: 10.1021/jp402270e] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reverse micelles are attractive nanoscale systems used for the confinement of molecules in studies of structure and chemical reactions, including protein folding, and aggregation. The simulation of reverse micelles, in which a water "pool" is separated from a nonpolar bulk phase by a surfactant layer, poses significant challenges to empirical force fields due to the diversity of interactions between nonpolar, polar, and charged groups. We have explored the dependence of system density, reverse micelle structure, and water configurational relaxation times as a function of reverse micelle composition, including water:surfactant ratio, absolute number of water molecules, and force field using molecular dynamics simulations. The resulting structures and dynamics are found to depend more on the force field used than on varying interpretations of the water:surfactant ratio in terms of absolute size of the reverse micelle. Substantial deviations from spherical reverse micelle geometries are observed in all unrestrained simulations. Rotational anisotropy decay times and water residence times show a strong dependence on force field and water model used, but power-law relaxation in time is observed independent of the force field. Our results suggest the need for further experimental study of reverse micelles that can provide insight into the distribution and dynamics of shape fluctuations in these complex systems.
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Zhang PY, Xu ZL, Yang H, Wei YM, Wu WZ. Fabrication and characterization of PVDF membranes via an in situ free radical polymerization method. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2013.03.058] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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