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Gochev GG, Campbell RA, Schneck E, Zawala J, Warszynski P. Exploring proteins at soft interfaces and in thin liquid films - From classical methods to advanced applications of reflectometry. Adv Colloid Interface Sci 2024; 329:103187. [PMID: 38788307 DOI: 10.1016/j.cis.2024.103187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/12/2024] [Accepted: 05/12/2024] [Indexed: 05/26/2024]
Abstract
The history of the topic of proteins at soft interfaces dates back to the 19th century, and until the present day, it has continuously attracted great scientific interest. A multitude of experimental methods and theoretical approaches have been developed to serve the research progress in this large domain of colloid and interface science, including the area of soft colloids such as foams and emulsions. From classical methods like surface tension adsorption isotherms, surface pressure-area measurements for spread layers, and surface rheology probing the dynamics of adsorption, nowadays, advanced surface-sensitive techniques based on spectroscopy, microscopy, and the reflection of light, X-rays and neutrons at liquid/fluid interfaces offers important complementary sources of information. Apart from the fundamental characteristics of protein adsorption layers, i.e., surface tension and surface excess, the nanoscale structure of such layers and the interfacial protein conformations and morphologies are of pivotal importance for extending the depth of understanding on the topic. In this review article, we provide an extensive overview of the application of three methods, namely, ellipsometry, X-ray reflectometry and neutron reflectometry, for adsorption and structural studies on proteins at water/air and water/oil interfaces. The main attention is placed on the development of experimental approaches and on a discussion of the relevant achievements in terms of notable experimental results. We have attempted to cover the whole history of protein studies with these techniques, and thus, we believe the review should serve as a valuable reference to fuel ideas for a wide spectrum of researchers in different scientific fields where proteins at soft interface may be of relevance.
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Affiliation(s)
- Georgi G Gochev
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30239 Krakow, Poland; Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
| | - Richard A Campbell
- Division of Pharmacy and Optometry, University of Manchester, M13 9PT Manchester, UK
| | - Emanuel Schneck
- Physics Department, Technical University Darmstadt, 64289 Darmstadt, Germany
| | - Jan Zawala
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30239 Krakow, Poland
| | - Piotr Warszynski
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30239 Krakow, Poland
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2
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Isakov NA, Belousov MV, Nizhnikov AA, Noskov BA. Dynamic properties of the layers of cupin-1.1 aggregates at the air/water interface. Biophys Chem 2024; 307:107166. [PMID: 38232602 DOI: 10.1016/j.bpc.2023.107166] [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: 09/19/2023] [Revised: 12/22/2023] [Accepted: 12/28/2023] [Indexed: 01/19/2024]
Abstract
Spread layers of amorphous aggregates of the structural domain of plant protein vicilin, cupin-1.1, at the water - air interface were studied by the surface tensiometry, dilational surface rheology, Brewster angle and atomic force microscopy. The layer properties differed strongly from the results for the layers of previously studied proteins. The dependency of the dynamic elasticity of the layer on surface pressure had two local maxima with the second peak being four times higher than the first one. In the region of the first maximum the obtained results are similar to those for dispersions of polymer microgels with a hairy corona. At the beginning of surface compression separate threads of the corona are stretched along the surface and the surface elasticity increases. The further compression results in the formation of loops and tails leading to a decrease of the elasticity. The second local maximum of the dynamic surface elasticity is presumably caused by the interactions of the rigid cores of the aggregates leading finally to the formation of multilayer structures at high surface pressures. In this case, the surface elasticity starts to decrease as a result of the segment exchange between different layers at the interface.
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Affiliation(s)
| | - Mikhail V Belousov
- St Petersburg State University, 199034 St. Petersburg, Russia; All-Russia Research Institute for Agricultural Microbiology, 196608 St. Petersburg, Russia
| | - Anton A Nizhnikov
- St Petersburg State University, 199034 St. Petersburg, Russia; All-Russia Research Institute for Agricultural Microbiology, 196608 St. Petersburg, Russia
| | - Boris A Noskov
- St Petersburg State University, 199034 St. Petersburg, Russia.
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3
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Noskov B, Loglio G, Miller R, Milyaeva O, Panaeva M, Bykov A. Dynamic Surface Properties of α-Lactalbumin Fibril Dispersions. Polymers (Basel) 2023; 15:3970. [PMID: 37836019 PMCID: PMC10574873 DOI: 10.3390/polym15193970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/19/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
The dynamic surface properties of aqueous dispersions of α-lactalbumin (ALA) amyloid fibrils differ noticeably from the properties of the fibril dispersions of other globular proteins. As a result, the protocol of the application of ALA fibrils to form stable foams and emulsions has to be deviate from that of other protein fibrils. Unlike the fibrils of β-lactoglobulin and lysozyme, ALA fibrils can be easily purified from hydrolyzed peptides and native protein molecules. The application of the oscillating barrier method shows that the dynamic surface elasticity of ALA fibril dispersions exceeds the surface elasticity of native protein solutions at pH 2. ALA fibrils proved to be stable at this pH, but the stability breaks at higher pH levels when the fibrils start to release small peptides of high surface activity. As a result, the dynamic surface properties of ALA coincide with those of native protein solutions. The ionic strength strongly influences the adsorption kinetics of both fibril dispersions and native protein solutions but have almost no impact on the structure of the adsorption layers.
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Affiliation(s)
- Boris Noskov
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, St. Petersburg 198504, Russia; (B.N.)
| | - Giuseppe Loglio
- Institute of Condensed Matter Chemistry and Technologies for Energy, 16149 Genoa, Italy
| | - Reinhard Miller
- Department of Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Olga Milyaeva
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, St. Petersburg 198504, Russia; (B.N.)
| | - Maria Panaeva
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, St. Petersburg 198504, Russia; (B.N.)
| | - Alexey Bykov
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, St. Petersburg 198504, Russia; (B.N.)
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Gao J, Stengel P, Lu T, Wu Y, Hawker DD, Gutowski KE, Hankett JM, Kellermeier M, Chen Z. Antiadhesive Copolymers at Solid/Liquid Interfaces: Complementary Characterization of Polymer Adsorption and Protein Fouling by Sum Frequency Generation Vibrational Spectroscopy and Quartz-Crystal Microbalance Measurements with Dissipation Monitoring. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12270-12282. [PMID: 37586045 DOI: 10.1021/acs.langmuir.3c01759] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Amphiphilic copolymers comprising hydrophilic segments of poly(ethylene glycol) and hydrophobic domains that are able to adhere to solid/liquid interfaces have proven to be versatile ingredients in formulated products for various types of applications. Recently, we have reported the successful synthesis of a copolymer designed for modifying the surface properties of polyesters as mimics for synthetic textiles. Using sum frequency generation (SFG) spectroscopy, it was shown that the newly developed copolymer adsorbs effectively on the targeted substrates even in the presence of surfactants as supplied by common detergents. In the present work, these studies were extended to evaluate the ability of the formed copolymer adlayers to passivate polyester surfaces against undesired deposition of bio(macro)molecules, as represented by fibrinogen as model protein foulants. In addition, SFG spectroscopy was used to elucidate the structure of fibrinogen at the interface between polyester and water. To complement the obtained data with an independent technique, analogous experiments were performed using quartz-crystal microbalance with dissipation monitoring for the detection of the relevant interfacial processes. Both methods give consistent results and deliver a holistic picture of brush copolymer adsorption on polyester surfaces and subsequent antiadhesive effects against proteins under different conditions representing the targeted application in home care products.
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Affiliation(s)
- Jinpeng Gao
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Peter Stengel
- Material Science, BASF SE, RGA/BM - B007, Carl-Bosch-Strasse 38, D-67056 Ludwigshafen, Germany
| | - Tieyi Lu
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Yuchen Wu
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
- Department of Macromolecular Science and Engineering, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Dustin D Hawker
- BASF Corporation, 1609 Biddle Avenue, Wyandotte, Michigan 48192, United States
| | - Keith E Gutowski
- BASF Corporation, 1609 Biddle Avenue, Wyandotte, Michigan 48192, United States
| | - Jeanne M Hankett
- BASF Corporation, 1609 Biddle Avenue, Wyandotte, Michigan 48192, United States
| | - Matthias Kellermeier
- Material Science, BASF SE, RGA/BM - B007, Carl-Bosch-Strasse 38, D-67056 Ludwigshafen, Germany
| | - Zhan Chen
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
- Department of Macromolecular Science and Engineering, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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Li Y, Liu X, Liu H, Zhu L. Interfacial adsorption behavior and interaction mechanism in saponin–protein composite systems: A review. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.108295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Unfolded Lipase at Interfaces Studied via Interfacial Dilational Rheology: The Impact of Urea. COLLOIDS AND INTERFACES 2022. [DOI: 10.3390/colloids6040056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Unfolding can interrupt the activity of enzymes. Lipase, the enzyme responsible for triglyceride catalysis, can be deactivated by unfolding, which can significantly affect the yield of enzymatic processes in biochemical engineering. Different agents can induce lipase unfolding, among which we study the impact of urea as a strong denaturant. Unfolding weakens the rigidity and stability of globular proteins, thereby changing the viscoelastic properties of the protein adsorbed layers. These changes can be detected and quantified using interfacial dilational rheology. The urea-induced unfolding of lipase destructs its globular structure, making it more flexible. The interfacial tension and viscoelastic moduli of lipase adsorbed layers reduce upon the addition of urea in the range of studied concentrations. The results agree with the theory that, upon unfolding, a distal region of the loop and tail domain forms adjacent to the proximal region of the interface. The exchange of matter between these regions reduces the viscoelasticity of the unfolded lipase adsorbed layers. Additionally, unfolding reduces the rigidity and brittleness of the lipase adsorbed layers: the aged adsorbed layer of native lipase can break upon high-amplitude perturbations of the interfacial area, unlike the case for urea-induced unfolded lipase.
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DNA Penetration into a Lysozyme Layer at the Surface of Aqueous Solutions. Int J Mol Sci 2022; 23:ijms232012377. [PMID: 36293234 PMCID: PMC9604093 DOI: 10.3390/ijms232012377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/07/2022] [Accepted: 10/12/2022] [Indexed: 11/08/2022] Open
Abstract
The interactions of DNA with lysozyme in the surface layer were studied by performing infrared reflection-absorption spectroscopy (IRRAS), ellipsometry, surface tensiometry, surface dilational rheology, and atomic force microscopy (AFM). A concentrated DNA solution was injected into an aqueous subphase underneath a spread lysozyme layer. While the optical properties of the surface layer changed fast after DNA injection, the dynamic dilational surface elasticity almost did not change, thereby indicating no continuous network formation of DNA/lysozyme complexes, unlike the case of DNA interactions with a monolayer of a cationic synthetic polyelectrolyte. A relatively fast increase in optical signals after a DNA injection under a lysozyme layer indicates that DNA penetration is controlled by diffusion. At low surface pressures, the AFM images show the formation of long strands in the surface layer. Increased surface compression does not lead to the formation of a network of DNA/lysozyme aggregates as in the case of a mixed layer of DNA and synthetic polyelectrolytes, but to the appearance of some folds and ridges in the layer. The formation of more disordered aggregates is presumably a consequence of weaker interactions of lysozyme with duplex DNA and the stabilization, at the same time, of loops of unpaired nucleotides at high local lysozyme concentrations in the surface layer.
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Zhao M, Zhang Y, Yang Q, Li T, Yuan C, Li J, Liang L, Nishinari K, Cui B. Foam properties and interfacial behavior of the heteroprotein complex of type-A gelatin/sodium caseinate. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Milyaeva OY, Rafikova AR. Effect of Low Concentrations of Thrombin on the Dynamic Surface Properties of Fibrinogen Solutions. COLLOID JOURNAL 2022. [DOI: 10.1134/s1061933x22010070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Bal JK, Das N, Mathur T, Plaisier JR, Thomas S. Physicochemical Properties of a Bi-aromatic Heterocyclic-Azo/BSA Hybrid System at the Air-Water Interface. ACS OMEGA 2022; 7:14031-14044. [PMID: 35559205 PMCID: PMC9089336 DOI: 10.1021/acsomega.2c00572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/01/2022] [Indexed: 06/15/2023]
Abstract
The interaction of a heterocyclic azo compound with itself and with bovine serum albumin (BSA) is realized by probing the structural modifications in Langmuir (L) monolayers and Langmuir-Blodgett (LB) films. It was found from the pressure-area/molecule isotherms that the elastic, thermodynamic, and hysteretic properties of the pure azo L monolayer were strongly altered due to the variation of temperature and pH of subphase water. In addition to that, the modification of such properties of the azo L monolayer due to mixing with BSA was also studied. The incorporation of BSA within the azo molecular assembly reduced the elasticity of that assembly. Such reduction of in-plane elasticity of the pure azo monolayer can also be achieved by reducing the temperature and pH of subphase water without adding BSA. A reduction in area per molecule of the azo assembly at the air-water interface associated with the conformational change from horizontal to vertical orientation facilitating π-π interaction was observed with increase in temperature and pH of the subphase. Such parameters also affected the interactions between azo and BSA molecules within the azo/BSA binary system. The structures of pure azo and binary films can be determined after they are transferred to hydrophilic and hydrophobic Si surfaces using the LB technique. Their out-of-plane and in-plane structures, as extracted from two complementary surface sensitive techniques, X-ray reflectivity and atomic force microscopy, were found to be strongly dependent on mixing with BSA, subphase pH, temperature, and substrate nature.
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Affiliation(s)
- Jayanta Kumar Bal
- Abhedananda
Mahavidyalaya, University of Burdwan, Sainthia, 731234, India
| | - Nilanjan Das
- Abhedananda
Mahavidyalaya, University of Burdwan, Sainthia, 731234, India
| | - Tanmay Mathur
- Abhedananda
Mahavidyalaya, University of Burdwan, Sainthia, 731234, India
| | - Jasper R. Plaisier
- Elettra
- Sincrotrone Trieste S.C.p.A., S.S. 14 Km 163.5 in Area Science Park, Basovizza, Trieste 34149, Italy
| | - Sabu Thomas
- International
and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam 686560, India
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12
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Interaction of fullerene C60 with bovine serum albumin at the water – air interface. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Surface Dilatational Rheology of Carboxyl-Containing Dimethylsiloxane Oligomers in Langmuir Films at the Air-Water Interface. BIONANOSCIENCE 2021. [DOI: 10.1007/s12668-021-00868-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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The dynamic surface properties of green fluorescent protein and its mixtures with poly(N,N-diallyl-N-hexyl-N-methylammonium chloride). J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.04.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Aguilera-Garrido A, del Castillo-Santaella T, Yang Y, Galisteo-González F, Gálvez-Ruiz MJ, Molina-Bolívar JA, Holgado-Terriza JA, Cabrerizo-Vílchez MÁ, Maldonado-Valderrama J. Applications of serum albumins in delivery systems: Differences in interfacial behaviour and interacting abilities with polysaccharides. Adv Colloid Interface Sci 2021; 290:102365. [PMID: 33667972 DOI: 10.1016/j.cis.2021.102365] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/13/2021] [Accepted: 01/13/2021] [Indexed: 12/17/2022]
Abstract
One of the major applications of Serum Albumins is their use as delivery systems for lipophilic compounds in biomedicine. Their biomedical application is based on the similarity with Human Serum Albumin (HSA), as a fully biocompatible protein. In general, Bovine Serum Albumin (BSA) is treated as comparable to its human homologue and used as a model protein for fundamental studies since it is available in high amounts and well understood. This protein can act as a carrier for lipophilic compounds or as protective shell in an emulsion-based vehicle. Polysaccharides are generally included in these formulations in order to increase the stability and/or applicability of the carrier. In this review, the main biomedical applications of Albumins as drug delivery systems are first presented. Secondly, the differences between BSA and HSA are highlighted, exploring the similarities and differences between these proteins and their interaction with polysaccharides, both in solution and adsorbed at interfaces. Finally, the use of Albumins as emulsifiers for emulsion-based delivery systems, concretely as Liquid Lipid Nanocapsules (LLNs), is revised and discussed in terms of the differences encountered in the molecular structure and in the interfacial properties. The specific case of Hyaluronic Acid is considered as a promising additive with important applications in biomedicine. The literature works are thoroughly discussed highlighting similarities and differences between BSA and HSA and their interaction with polysaccharides encountered at different structural levels, hence providing routes to control the optimal design of delivery systems.
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Wang Y, Guo Z, Tan T, Ji Y, Hu J, Zhang Y. The effects of nanobubbles on the assembly of glucagon amyloid fibrils. SOFT MATTER 2021; 17:3486-3493. [PMID: 33657201 DOI: 10.1039/d0sm02279a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Some recent studies have shown that the surface and interface play an important role in the assembly and aggregation of amyloid proteins. However, it is unclear how the gas-liquid interface affects the protein assembly at the nanometer scale although the presence of gas-liquid interfaces is very common in in vitro experiments. Nanobubbles have a large specific surface area, which provides a stage for interactions with various proteins and peptides on the nanometer scale. In this work, nanobubbles produced in solution were employed for studying the effects of the gas-liquid interface on the assembly of glucagon proteins. Atomic force microscopy (AFM) studies showed that nanobubble-treated glucagon solution formed fibrils with an apparent height of 4.02 ± 0.71 nm, in contrast to the fibrils formed with a height of 2.14 ± 0.53 nm in the control. Transmission electron microscopy (TEM) results also showed that nanobubbles promoted the assembly of glucagon to form more fibrils. Thioflavin T (ThT) fluorescence and Fourier transform infrared (FTIR) analyses indicated that the nanobubbles induced the change of the glucagon conformation to a β-sheet structure. A mechanism that explains how nanobubbles affect the assembly of glucagon amyloid fibrils was proposed based on the above-mentioned experimental results. Given the fact that there are a considerable amount of nanobubbles existing in protein solutions, our results indicate that nanobubbles should be considered for fully understanding the protein aggregation events in vitro.
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Affiliation(s)
- Yujiao Wang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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Krycki MM, Lin SY, Loglio G, Michailov AV, Miller R, Noskov BA. Impact of denaturing agents on surface properties of myoglobin solutions. Colloids Surf B Biointerfaces 2021; 202:111657. [PMID: 33684687 DOI: 10.1016/j.colsurfb.2021.111657] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 01/05/2023]
Abstract
The addition of denaturants strongly influences the surface properties of aqueous myoglobin solutions. The effect differs from the results for mixed solutions of the denaturants and other globular proteins, for example, bovine serum albumin (BSA), lysozyme and β-lactoglobulin (BLG), although the surface properties of the solutions of the pure proteins are similar. The kinetic dependencies of the dynamic surface elasticity of myoglobin solutions with guanidine hydrochloride (GuHCl) reveal at least two adsorption steps at denaturant concentrations higher than 1 M: a very fast increase of the dynamic surface elasticity to approximately 30 mN/m at the beginning of adsorption, and a slower growth to abnormally high values of 250-300 mN/m. At the same time, the surface elasticity of BSA/GuHCl, BLG/GuHCl and lysozyme/GuHCl solutions is a non-monotonic function of the surface age, and does not exceed 50 mN/m close to equilibrium. The high surface elasticity of myoglobin/GuHCl solutions may be associated with protein aggregation in the surface layer. The formation of aggregates is confirmed by ellipsometry and Brewster angle microscopy. The addition of ionic surfactants to protein solutions leads to the formation of myoglobin/surfactant complexes, and the kinetic dependencies of the dynamic surface elasticity display local maxima indicating multistep adsorption kinetics, unlike the corresponding results for solutions of other globular proteins mixed with ionic surfactants. Ellipsometry and infrared reflection-absorption spectroscopy allow tracing the adsorption of the complexes and their displacement from the interface at high surfactant concentrations.
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Affiliation(s)
- Michael M Krycki
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, St.-Petersburg, 198504, Russia; University of Opole, Opole, Poland
| | - Shi-Yow Lin
- National Taiwan University of Science and Technology, Chemical Engineering Department, Taipei, Taiwan
| | - Giuseppe Loglio
- Institute of Condensed Matter Chemistry and Technologies for Energy, Genoa, Italy
| | - Alexander V Michailov
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, St.-Petersburg, 198504, Russia
| | | | - Boris A Noskov
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, St.-Petersburg, 198504, Russia.
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β-Lactoglobulin Adsorption Layers at the Water/Air Surface: 5. Adsorption Isotherm and Equation of State Revisited, Impact of pH. COLLOIDS AND INTERFACES 2021. [DOI: 10.3390/colloids5010014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The theoretical description of the adsorption of proteins at liquid/fluid interfaces suffers from the inapplicability of classical formalisms, which soundly calls for the development of more complicated adsorption models. A Frumkin-type thermodynamic 2-d solution model that accounts for nonidealities of interface enthalpy and entropy was proposed about two decades ago and has been continuously developed in the course of comparisons with experimental data. In a previous paper we investigated the adsorption of the globular protein β-lactoglobulin at the water/air interface and used such a model to analyze the experimental isotherms of the surface pressure, Π(c), and the frequency-, f-, dependent surface dilational viscoelasticity modulus, E(c)f, in a wide range of protein concentrations, c, and at pH 7. However, the best fit between theory and experiment proposed in that paper appeared incompatible with new data on the surface excess, Γ, obtained from direct measurements with neutron reflectometry. Therefore, in this work, the same model is simultaneously applied to a larger set of experimental dependences, e.g., Π(c), Γ(c), E(Π)f, etc., with E-values measured strictly in the linear viscoelasticity regime. Despite this ambitious complication, a best global fit was elaborated using a single set of parameter values, which well describes all experimental dependencies, thus corroborating the validity of the chosen thermodynamic model. Furthermore, we applied the model in the same manner to experimental results obtained at pH 3 and pH 5 in order to explain the well-pronounced effect of pH on the interfacial behavior of β-lactoglobulin. The results revealed that the propensity of β-lactoglobulin globules to unfold upon adsorption and stretch at the interface decreases in the order pH 3 > pH 7 > pH 5, i.e., with decreasing protein net charge. Finally, we discuss advantages and limitations in the current state of the model.
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Guckeisen T, Hosseinpour S, Peukert W. Effect of pH and urea on the proteins secondary structure at the water/air interface and in solution. J Colloid Interface Sci 2021; 590:38-49. [PMID: 33524719 DOI: 10.1016/j.jcis.2021.01.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 01/09/2023]
Abstract
HYPOTHESIS The secondary structure of proteins affects their functionality and performance in physiological environments or industrial applications. Change of the solution pH or the presence of protein denaturants are the main chemical means that can alter the secondary structure of proteins or lead to protein denaturation. Since proteins in the bulk solution and those residing at the solution/air interface experience different local environments, their response to chemical denaturation can be different. EXPERIMENTS We utilize circular dichroism and chiral/achiral sum frequency generation spectroscopy to study the secondary structure of selected proteins as a function of the solution pH or in the presence of 8 M urea in the bulk solution and at the solution/air interface, respectively. FINDINGS The liquid/air interface can enhance or decrease protein conformation stability. The change in the secondary structure of the surface adsorbed proteins in alkaline solutions occurs at pH values lower than those denaturing the studied proteins in the bulk solution. In contrast, while 8 M urea completely denatures the studied proteins in the bulk solution, the liquid/air interface prevents the urea-induced denaturation of the surface adsorbed proteins by limiting the access of urea to the hydrophobic side chains of proteins protruding to air.
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Affiliation(s)
- Tobias Guckeisen
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität-Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany.
| | - Saman Hosseinpour
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität-Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany.
| | - Wolfgang Peukert
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität-Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany.
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Hsieh TL, Martinez MR, Garoff S, Matyjaszewski K, Tilton RD. Interfacial dilatational rheology as a bridge to connect amphiphilic heterografted bottlebrush copolymer architecture to emulsifying efficiency. J Colloid Interface Sci 2021; 581:135-147. [DOI: 10.1016/j.jcis.2020.07.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 11/29/2022]
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21
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The role of conformational state of pH-shifted β-conglycinin on the oil/water interfacial properties and emulsifying capacities. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105990] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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22
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Milyaeva O, Bykov A, Campbell R, Loglio G, Miller R, Noskov B. The dynamic properties of PDA-laccase films at the air-water interface. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124930] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Adsorption layer formation in dispersions of protein aggregates. Adv Colloid Interface Sci 2020; 276:102086. [PMID: 31895989 DOI: 10.1016/j.cis.2019.102086] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 12/13/2019] [Indexed: 02/06/2023]
Abstract
The review discusses recent results on the adsorption of amyloid fibrils and protein microgels at liquid/fluid interfaces. The application of the shear and dilational surface rheology, atomic force microscopy and passive particle probe tracking allowed for elucidating characteristic features of the protein aggregate adsorption while some proposed hypothesis still must be examined by special methods for structural characterization. Although the distinctions of the shear surface properties of dispersions of protein aggregates from the properties of native protein solutions are higher than the corresponding distinctions of the dilational surface properties, the latter ones give a possibility to obtain new information on the formation of fibril aggregates at the water/air interface. Only the adsorption of BLG microgels and fibrils was studied in some details. The kinetic dependencies of the dynamic surface tension and dilational surface elasticity for aqueous dispersions of protein globules, protein microgels and purified fibrils are similar if the system does not contain flexible macromolecules or flexible protein fragments. In the opposite case the kinetic dependencies of the dynamic surface elasticity can be non-monotonic. The solution pH influences strongly the dynamic surface properties of the dispersions of protein aggregates indicating that the adsorption kinetics is controlled by an electrostatic adsorption barrier if the pH deviates from the isoelectric point. A special section of the review considers the possibility to apply kinetic models of nanoparticle adsorption to the adsorption of protein aggregates.
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Chirkov NS, Akentiev AV, Campbell RA, Lin SY, Timoshen KA, Vlasov PS, Noskov BA. Network Formation of DNA/Polyelectrolyte Fibrous Aggregates Adsorbed at the Water-Air Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13967-13976. [PMID: 31592674 DOI: 10.1021/acs.langmuir.9b02487] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is discovered that complexes of DNA and hydrophobically modified polyelectrolytes form a rigid network of threadlike or fibrous aggregates at the liquid-gas interface whose morphology can dramatically affect the mechanical properties. While mixed solutions of DNA and poly(N,N-diallyl-N,N-dimethylammonium chloride) (PDADMAC) exhibit no notable surface activity, the complexes formed from DNA with poly(N,N-diallyl-N-butyl-N-methylammonium chloride) are surface-active, in contrast to either of the separate components. Further, complexes of DNA and poly(N,N-diallyl-N-hexyl-N-methylammonium chloride) (PDAHMAC) with its longer hydrophobic side chains exhibit pronounced surface activity with values of surface pressures up to 16 mN/m and dynamic surface elasticity up to 58 mN/m. If the PDAHMAC nitrogen to DNA phosphate molar ratio, N/P, is between 0.6 and 3, abrupt compression of the adsorption layer leads unexpectedly to a noticeable decrease of the surface elasticity. The application of imaging techniques reveals that this effect is a consequence of the destruction of a rigid network of threadlike DNA/polyelectrolyte aggregates at the interface. The toroidal aggregates, which are typical for the bulk phase of DNA/PDADMAC solutions in this range of N/P ratios, are not observed in the surface layer. The observed link between the mechanical properties and interfacial morphology of surface-active complexes formed from DNA with hydrophobically modified polyelectrolytes indicates that tuning polyelectrolyte hydrophobicity in these systems may be a means to develop their use in applications ranging from nonviral gene-delivery vehicles to conductive nanowires.
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Affiliation(s)
- N S Chirkov
- Institute of Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
| | - A V Akentiev
- Institute of Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
| | - R A Campbell
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health , University of Manchester , Manchester M13 9PT , U.K
| | - S-Y Lin
- Chemical Engineering Department , National Taiwan University of Science and Technology , 43 Keelung Road, Section 4 , 106 Taipei , Taiwan
| | - K A Timoshen
- Institute of Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
| | - P S Vlasov
- Institute of Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
| | - B A Noskov
- Institute of Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
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Milyaeva O, Bykov A, Campbell R, Loglio G, Miller R, Noskov B. Polydopamine layer formation at the liquid – gas interface. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123637] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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Richert ME, Gochev GG, Braunschweig B. Specific Ion Effects of Trivalent Cations on the Structure and Charging State of β-Lactoglobulin Adsorption Layers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11299-11307. [PMID: 31398284 DOI: 10.1021/acs.langmuir.9b01803] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The properties of proteins at interfaces are important to many processes as well as in soft matter materials such as aqueous foam. Particularly, the protein interfacial behavior is strongly linked to different factors like the solution pH or the presence of electrolytes. Here, the nature of the electrolyte ions can significantly modify the interfacial properties of proteins. Therefore, molecular level studies on interfacial structures and charging states are needed. In this work, we addressed the effects of Y3+ and Nd3+ cations on the adsorption of the whey protein β-lactoglobulin (BLG) at air-water interfaces as the function of electrolyte concentration. Both cations caused very similar but dramatic changes at the interface and in the bulk solution. Here, measurements of the electrophoretic mobility and with vibrational sum-frequency generation (SFG) spectroscopy were applied and consistently showed a reversal of the BLG net charge at remarkably low ion concentrations of 30 (bulk) and 40 (interface) μM of Y3+ or Nd3+ for a BLG concentration of 15 μM. SFG spectra of carboxylate stretching vibrations from Asp or Glu residues of interfacial BLG showed significant changes in the resonance frequency, which we associate to specific and efficient binding of Y3+ or Nd3+ ions to the proteins carboxylate groups. Characteristic reentrant condensation for BLG moieties with bound trivalent ions was found in a broad concentration range around the point of zero net charge. The highest colloidal stability of BLG was found for ion concentrations <20 μM and >50 μM. Investigations on macroscopic foams from BLG solutions revealed the existence of structure-property relations between the interfacial charging state and the foam stability. In fact, a minimum in foam stability at 20 μM ion concentration was found when the interfacial net charge was negligible. At this concentration, we propose that the persistent BLG molecules and weakly charged BLG aggregates drive foam stability, while outside the bulk reentrant zone the electrostatic disjoining pressure inside foam lamellae dominates foam stability. Our results provide new information on the charge reversal at the liquid-gas interface of protein/ion dispersions. Therefore, we see our findings as an important step in the clarification of reentrant condensation effects at interfaces and their relevance to foam stability.
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Affiliation(s)
- Manuela E Richert
- Institute of Physical Chemistry and Center for Soft Nanoscience , Westfälische Wilhelms-Universität Münster Corrensstraße 28/30 , 48149 Münster , Germany
| | - Georgi G Gochev
- Institute of Physical Chemistry and Center for Soft Nanoscience , Westfälische Wilhelms-Universität Münster Corrensstraße 28/30 , 48149 Münster , Germany
| | - Björn Braunschweig
- Institute of Physical Chemistry and Center for Soft Nanoscience , Westfälische Wilhelms-Universität Münster Corrensstraße 28/30 , 48149 Münster , Germany
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Xu N, Wang L, Dou N, Zhang L, Guan J, Chang Y, Li R. Foam fractionation for enhancing silica gel adsorption of urokinase from human urine. ASIA-PAC J CHEM ENG 2019. [DOI: 10.1002/apj.2334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Na Xu
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
| | - Lu Wang
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
| | - Nongxiao Dou
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
| | - Lili Zhang
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
| | - Jing Guan
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
| | - Yunkang Chang
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
| | - Rui Li
- School of Biological ScienceJining Medical University Rizhao Shandong Province China
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28
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Milyaeva OY, Campbell RA, Gochev G, Loglio G, Lin SY, Miller R, Noskov BA. Dynamic Surface Properties of Mixed Dispersions of Silica Nanoparticles and Lysozyme. J Phys Chem B 2019; 123:4803-4812. [DOI: 10.1021/acs.jpcb.9b03352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Olga Yu. Milyaeva
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Richard A. Campbell
- Division of Pharmacy and Optometry, University of Manchester, Manchester M13 9PT, U.K
| | - Georgi Gochev
- Institute of Physical Chemistry, WWU Münster, 48149 Münster, Germany
- Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Giuseppe Loglio
- Institute of Condensed Matter Chemistry and Energy Technology, CNR-ICMATE, Genova, Italy
| | - Shi-Yow Lin
- Chemical Engineering Department, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Reinhard Miller
- Max-Planck-Institute for Colloid and Interface Science, D-14476 Golm, Germany
| | - Boris A. Noskov
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
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29
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Noskov BA, Timoshen KA, Akentiev AV, Chirkov NS, Dubovsky IM, Lebedev VT, Lin SY, Loglio G, Miller R, Sedov VP, Borisenkova AA. Dynamic Surface Properties of Fullerenol Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3773-3779. [PMID: 30762366 DOI: 10.1021/acs.langmuir.8b04152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Application of dilational surface rheology, surface tensiometry, ellipsometry, Brewster angle, and transmission electron and atomic force microscopies allowed the estimation of the structure of the adsorption layer of a fullerenol with a large number of hydroxyl groups, C60(OH) X ( X = 30 ± 2). The surface properties of fullerenol solutions proved to be similar to the properties of dispersions of solid nanoparticles and differ from those of the solutions of conventional surfactants and amphiphilic macromolecules. Although the surface activity of fullerenol is not high, it forms adsorption layers of high surface elasticity up to 170 mN/m. The layer consists of small interconnected surface aggregates with the thickness corresponding to two-three layers of fullerenol molecules. The aggregates are not adsorbed from the bulk phase but formed at the interface. The adsorption kinetics is controlled by an electrostatic adsorption barrier at the interface.
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Affiliation(s)
- Boris A Noskov
- St. Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Kirill A Timoshen
- St. Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Alexander V Akentiev
- St. Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Nikolay S Chirkov
- St. Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Ignat M Dubovsky
- B.P. Konstantinov Petersburg Nuclear Physics Institute, NRC Kurchatov Institute , 188300 Gatchina, Leningrad , Russia
| | - Vasyli T Lebedev
- B.P. Konstantinov Petersburg Nuclear Physics Institute, NRC Kurchatov Institute , 188300 Gatchina, Leningrad , Russia
| | - Shi-Yow Lin
- Chemical Engineering Department , National Taiwan University of Science and Technology , 43 Keelung Road, Section 4 , 106 Taipei , Taiwan
| | - Giuseppe Loglio
- Institute of Condensed Matter Chemistry and Technologies for Energy , 16149 Genoa , Italy
| | - Reinhard Miller
- MPI für Kolloid- und Grenzflächenforschung , Wissenschaftspark Golm, D-14424 Golm , Germany
| | - Victor P Sedov
- B.P. Konstantinov Petersburg Nuclear Physics Institute, NRC Kurchatov Institute , 188300 Gatchina, Leningrad , Russia
| | - Alina A Borisenkova
- B.P. Konstantinov Petersburg Nuclear Physics Institute, NRC Kurchatov Institute , 188300 Gatchina, Leningrad , Russia
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30
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Li T, Lilja K, Morris RJ, Brandani GB. Langmuir–Blodgett technique for anisotropic colloids: Young investigator perspective. J Colloid Interface Sci 2019; 540:420-438. [DOI: 10.1016/j.jcis.2019.01.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 10/27/2022]
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31
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Effect of Amplitude on the Surface Dilational Visco-Elasticity of Protein Solutions. COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2040057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Harmonic drop surface area oscillations are performed at a fixed frequency (0.1 Hz) to measure the dilational visco-elasticity for three proteins: β-casein (BCS), β-lactoglobulin (BLG), and human serum albumin (HSA). The surface area oscillations were performed with different amplitudes in order to find the origin of non-linearity effects. The analysis of data shows that the non-linearity in the equation of state—i.e., the relation between surface pressure and surface concentration of adsorbed protein molecules—is the main source of the amplitude effects on the apparent visco-elasticity, while perturbations due to non-uniform expansions and compressions of the surface layer, inertia effects leading to deviations of the drop profile from the Laplacian shape, or convective transport in the drop bulk are of less importance. While for the globular proteins, HSA and BLG the amplitude effects on the apparent visco-elasticity are rather large, for the non-globular protein BCS this effect is negligible in the studied range of up to 10% area deformation.
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32
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Wang Y, Shen Z, Guo Z, Hu J, Zhang Y. Effects of nanobubbles on peptide self-assembly. NANOSCALE 2018; 10:20007-20012. [PMID: 30351325 DOI: 10.1039/c8nr06142d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
It is believed that the aggregation of amyloid proteins or peptides is promoted by the presence of an air-water interface, and substantial evidence suggests that the characteristics of the air-water interface play critical roles in foam-induced protein aggregation during foam fractionation. However, the effects of the air-water interface on the self-assembly of amyloid-like peptides have not yet been elucidated clearly at the nanometer scale. In this work, air nanobubbles produced in water solution were employed for studying interfacial effects on the self-assembly of a model amyloid peptide termed P11. An atomic force microscopy study showed that the air nanobubbles induced the formation of peptide fibrils with a 9-13 nm helix structure in the P11 solution. Thioflavin T fluorescence and circular dichroism spectroscopic analysis indicated that the nanobubbles induced the change of the peptide conformation to a β-sheet structure. Based on these observations, we have proposed a mechanism to explain how the nanobubbles affect the self-assembly of the P11 peptide at the nanometer scale. Since air nanobubbles are present in water solutions in addition to an air-water interface in normal experiments in vitro, our results indicate that nanobubbles must be taken into account to achieve a complete understanding of protein aggregation events.
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Affiliation(s)
- Yujiao Wang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
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33
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Effect of EO group on the interfacial dilational rheology of fatty acid methyl ester solutions. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Liu KX, Yin HJ, Zhang L, Jin ZQ, Zhang L. Dilational rheological properites of oxyethylated fatty acid methyl esters at kerosene-water interface. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1461646] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ke-xin Liu
- College of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Hong-jun Yin
- College of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Lei Zhang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhi-qiang Jin
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lu Zhang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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35
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Fainerman VB, Kovalchuk VI, Aksenenko EV, Zinkovych II, Makievski AV, Nikolenko MV, Miller R. Dilational Viscoelasticity of Proteins Solutions in Dynamic Conditions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6678-6686. [PMID: 29783835 DOI: 10.1021/acs.langmuir.8b00631] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Drop profile analysis tensiometry used in the oscillating drop mode provides the dilational viscoelasticity of adsorption layers at liquid interfaces. Applied during the progress of adsorption the dynamic surface rheology can be monitored. For β-casein solutions at the same surface pressure values, the larger the dynamic dilational viscoelasticity the longer the adsorption time, i.e., the smaller the studied protein concentration is. For β-lactoglobulin and human serum albumin, the differences in the viscoelasticity values are less or not dependent on the adsorption time at identical surface pressures. The observed effects are caused by the flexibility of BCS, while the globular proteins BLG and HSA do not change their conformation significantly within the adsorption layer.
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Affiliation(s)
| | | | - Eugene V Aksenenko
- Institute of Colloid Chemistry and Chemistry of Water , Kyiv (Kiev) 03680 , Ukraine
| | - Igor I Zinkovych
- Maxim Gorki Donetsk National Medical University , Kirovohrad 25015 , Ukraine
| | | | - Mykola V Nikolenko
- Ukrainian State University of Chemical Technology , Dnipro 49005 , Ukraine
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36
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Campbell RA, Tummino A, Varga I, Milyaeva OY, Krycki MM, Lin SY, Laux V, Haertlein M, Forsyth VT, Noskov BA. Adsorption of Denaturated Lysozyme at the Air-Water Interface: Structure and Morphology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5020-5029. [PMID: 29629770 DOI: 10.1021/acs.langmuir.8b00545] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The application of protein deuteration and high flux neutron reflectometry has allowed a comparison of the adsorption properties of lysozyme at the air-water interface from dilute solutions in the absence and presence of high concentrations of two strong denaturants: urea and guanidine hydrochloride (GuHCl). The surface excess and adsorption layer thickness were resolved and complemented by images of the mesoscopic lateral morphology from Brewster angle microscopy. It was revealed that the thickness of the adsorption layer in the absence of added denaturants is less than the short axial length of the lysozyme molecule, which indicates deformation of the globules at the interface. Two-dimensional elongated aggregates in the surface layer merge over time to form an extensive network at the approach to steady state. Addition of denaturants in the bulk results in an acceleration of adsorption and an increase of the adsorption layer thickness. These results are attributed to incomplete collapse of the globules in the bulk from the effects of the denaturants as a result of interactions between remote amino acid residues. Both effects may be connected to an increase of the effective total volume of macromolecules due to the changes of their tertiary structure, that is, the formation of molten globules under the influence of urea and the partial unfolding of globules under the influence of GuHCl. In the former case, the increase of globule hydrophobicity leads to cooperative aggregation in the surface layer during adsorption. Unlike in the case of solutions without denaturants, the surface aggregates are short and wormlike, their size does not change with time, and they do not merge to form an extensive network at the approach to steady state. To the best of our knowledge, these are the first observations of cooperative aggregation in lysozyme adsorption layers.
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Affiliation(s)
- Richard A Campbell
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9, France
| | - Andrea Tummino
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9, France
- Institute of Chemistry , Eötvös Lorand University , P.O. Box 32, Budapest 112 , Hungary
| | - Imre Varga
- Institute of Chemistry , Eötvös Lorand University , P.O. Box 32, Budapest 112 , Hungary
- Department of Chemistry , University J. Selyeho , P.O. Box 54, 945 01 Komárno , Slovakia
| | - Olga Yu Milyaeva
- Department of Colloid Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
| | - Michael M Krycki
- Department of Colloid Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
| | - Shi-Yow Lin
- Chemical Engineering Department , National Taiwan University of Science and Technology , 43 Keelung Road, Section 4 , Taipei 106 , Taiwan
| | - Valerie Laux
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9, France
| | - Michael Haertlein
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9, France
| | - V Trevor Forsyth
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9, France
- Faculty of Natural Sciences , Keele University , Staffordshire ST5 5BG , U.K
| | - Boris A Noskov
- Department of Colloid Chemistry , St. Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russia
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37
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Yano YF, Arakawa E, Voegeli W, Kamezawa C, Matsushita T. Initial Conformation of Adsorbed Proteins at an Air–Water Interface. J Phys Chem B 2018; 122:4662-4666. [DOI: 10.1021/acs.jpcb.8b01039] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Yohko F. Yano
- Department of Physics, Kindai University, 3-4-1 Kowakae, Higashiosaka City, Osaka 577-8502, Japan
| | - Etsuo Arakawa
- Department of Physics, Tokyo Gakugei University, 4-1-1 Nukuikita-machi, Koganei, Tokyo 184-8501, Japan
| | - Wolfgang Voegeli
- Department of Physics, Tokyo Gakugei University, 4-1-1 Nukuikita-machi, Koganei, Tokyo 184-8501, Japan
| | - Chika Kamezawa
- Department of Physics, Tokyo Gakugei University, 4-1-1 Nukuikita-machi, Koganei, Tokyo 184-8501, Japan
| | - Tadashi Matsushita
- Photon Factory, Institute of Materials Structure Science, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
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39
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Hegemann J, Knoche S, Egger S, Kott M, Demand S, Unverfehrt A, Rehage H, Kierfeld J. Pendant capsule elastometry. J Colloid Interface Sci 2018; 513:549-565. [DOI: 10.1016/j.jcis.2017.11.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 11/15/2017] [Accepted: 11/16/2017] [Indexed: 10/18/2022]
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40
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Linear shear rheology of aging β-casein films adsorbing at the air/water interface. J Colloid Interface Sci 2018; 511:12-20. [DOI: 10.1016/j.jcis.2017.09.092] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/22/2017] [Accepted: 09/23/2017] [Indexed: 11/22/2022]
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41
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Peng D, Yang J, Li J, Tang C, Li B. Foams Stabilized by β-Lactoglobulin Amyloid Fibrils: Effect of pH. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10658-10665. [PMID: 29135243 DOI: 10.1021/acs.jafc.7b03669] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
β-Lactoglobulin fibrils could serve as a surface-active component and form adsorption layers at the air/water interface. In this study, the physical parameters related to the surface adsorption, foaming, and surface properties of β-lactoglobulin fibrils as a function of pH (2-8) were investigated. Results showed that an increase of pH from 2 to 5 led to a rise of the viscoelastic modulus of the surface adsorption layer and half-life time (t1/2) of foams, but it decreased foamability. When the pH was close to its isoelectric point (5.2), fibrils had the lowest electrostatic repulsion and entangled at the air/water interface resulting in a tightly packaged adsorption layer around bubbles to prevent coalescence and coarsening. When the pH (7-8) was higher than the pI of fibrils, the negatively charged β-lactoglobulin fibrils possessed good foamability (∼80%) and high foam stability (t1/2 ≈ 8 h) simultaneously even at low concentration (1 mg/mL). It demonstrated that β-lactoglobulin fibrils with negative charges presented a good foaming behavior and could be a potential new foaming agent in the food industry.
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Affiliation(s)
- Dengfeng Peng
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Jinchu Yang
- Technology Center, China Tobacco Henan Industrial Company Limited , Zhengzhou, Henan 450000, People's Republic of China
| | - Jing Li
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Cuie Tang
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
| | - Bin Li
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China
- Functional Food Enginnering & Technology Research Center of Hubei Province , Wuhan, Hubei 430070, People's Republic of China
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Increase of bubble size playing a critical role in foam-induced protein aggregation: Aggregation of BSA in foam fractionation. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.09.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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43
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Lai L, Wei XQ, Huang WH, Mei P, Ren ZH, Liu Y. Impact of carbon quantum dots on dynamic properties of BSA and BSA/DPPC adsorption layers. J Colloid Interface Sci 2017; 506:245-254. [DOI: 10.1016/j.jcis.2017.07.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 07/09/2017] [Accepted: 07/15/2017] [Indexed: 10/19/2022]
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44
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Novikova AA, Vlasov PS, Lin SY, Sedláková Z, Noskov BA. Dynamic surface properties of poly(methylalkyldiallylammonium chloride) solutions. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.08.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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45
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Noskov BA, Timoshen KA, Akentiev AV, Charykov NA, Loglio G, Miller R, Semenov KN. Dynamic surface properties of C60-arginine and C60-l-lysine aqueous solutions. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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46
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Noskov BA, Krycki MM. Formation of protein/surfactant adsorption layer as studied by dilational surface rheology. Adv Colloid Interface Sci 2017; 247:81-99. [PMID: 28716186 DOI: 10.1016/j.cis.2017.07.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 06/19/2017] [Accepted: 07/02/2017] [Indexed: 12/25/2022]
Abstract
The review discusses the mechanism of formation of protein/surfactant adsorption layers at the liquid - gas interface. The complexes of globular proteins usually preserve their compact structure a low surfactant concentrations. Therefore a simple kinetic model of the adsorption of charged compact nanoparticles is discussed first and compared with experimental data. The increase of surfactant concentrations results in various conformational transitions in the surface layer. One can obtain information on the changes of the adsorption layer structure using the dilational surface rheology. The kinetic dependencies of the dynamic surface elasticity are strongly different for the adsorption of unfolded macromolecules and compact globules, and have local maxima in the former case corresponding to different steps of the adsorption. These distinctions allow tracing the changes of the tertiary structure of protein/surfactant complexes in the surface layer. The adsorption from mixed solutions of ionic surfactants with β-casein, β-lactoglobulin, bovine serum albumin and myoglobin is discussed with some details.
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47
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Ulaganathan V, Retzlaff I, Won J, Gochev G, Gunes D, Gehin-Delval C, Leser M, Noskov B, Miller R. β-Lactoglobulin adsorption layers at the water/air surface: 2. Dilational rheology: Effect of pH and ionic strength. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.08.064] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Won J, Gochev G, Ulaganathan V, Krägel J, Aksenenko E, Fainerman V, Miller R. Mixed adsorption mechanism for the kinetics of BLG interfacial layer formation at the solution/tetradecane interface. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.08.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Ulaganathan V, Retzlaff I, Won J, Gochev G, Gehin-Delval C, Leser M, Noskov B, Miller R. β-Lactoglobulin adsorption layers at the water/air surface: 1. Adsorption kinetics and surface pressure isotherm: Effect of pH and ionic strength. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.03.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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50
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Zhou T, Yuan J, Chen Y, Xin X, Tan Y, Xu G. Surface Rheological Properties of Hydrophobically Modified Polyacrylamide and Imidazolium Surfactant Systems. J SURFACTANTS DETERG 2017. [DOI: 10.1007/s11743-017-1931-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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