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Adsorption characteristics of various proteins on a metal surface in the presence of an external electric potential. Colloids Surf B Biointerfaces 2018; 166:262-268. [DOI: 10.1016/j.colsurfb.2018.03.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 03/22/2018] [Accepted: 03/23/2018] [Indexed: 11/22/2022]
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Htwe EE, Nakama Y, Imanaka H, Ishida N, Imamura K. Influence of an external electric field on removal of protein fouling on a stainless steel surface by proteolytic enzymes. Colloids Surf B Biointerfaces 2017; 159:118-124. [PMID: 28780458 DOI: 10.1016/j.colsurfb.2017.07.074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/20/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
Abstract
Enzymatic cleaning is a potentially useful method for removing proteinaceous fouling from solid surfaces under mild conditions. Herein, the influence of an external electric field on the enzymatic cleaning of a metal surface fouled with a protein was investigated. The model fouling protein (BSA; lysozyme) was prepared on a stainless steel (St) surface, and the resulting surface subjected to enzymatic cleaning with an electric potential being applied to the St plate. Trypsin, α-chymotrypsin, and thermolysin were used as model proteases. The amounts of protein remaining on the plate before and during the cleaning process were measured by means of a reflection absorption technique using Fourier transform infrared spectroscopy. In the case for BSA fouling, the cleaning efficiency of the protease tended to increase at more negative applied potentials. Whereas, there was an optimum applied potential for removing the lysozyme fouling. Atomic force microscopy analyses indicated that applying an adequate range of electric potential enhanced the enzymatic removal of protein fouling inside scratches on the St plate surface. These findings suggest the existence of two modes of electrostatic interactions for the external electric field, one with protease molecules and the other with digested fragments of the fouling protein.
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Affiliation(s)
- Ei Ei Htwe
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Yuhi Nakama
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Hiroyuki Imanaka
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Naoyuki Ishida
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Koreyoshi Imamura
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
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Loupe N, Doan J, Smotkin ES. Twenty years of operando IR, X-ray absorption, and Raman spectroscopy: Direct methanol and hydrogen fuel cells. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.06.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Adsorption of lysozyme on base metal surfaces in the presence of an external electric potential. Colloids Surf B Biointerfaces 2016; 147:9-16. [DOI: 10.1016/j.colsurfb.2016.07.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/14/2016] [Accepted: 07/19/2016] [Indexed: 11/20/2022]
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Bozgeyik K, Kopac T. Adsorption Properties of Arc Produced Multi Walled Carbon Nanotubes for Bovine Serum Albumin. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2016. [DOI: 10.1515/ijcre-2015-0160] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study, adsorption properties of arc produced Multi Walled Carbon Nanotubes (MWNT) were investigated for Bovine Serum Albumin (BSA) in aqueous phase. Solution pH, adsorbent amount and temperature effects were examined on protein adsorption. The results show that, the temperature and the adsorbent amount both increase the BSA adsorption, whereas the solution pH has a decreasing effect. The equilibrium behavior of protein adsorption was examined by Langmuir and Freundlich isotherms. The monolayer adsorption capacities at 40 °C for solution pH 4 and 5 were determined as 139.5 and 127.2 mg g−1, respectively, which were much higher than the BSA adsorption capacities of various metal oxides investigated in our previous studies. The adsorption rate data were compared by the pseudo-first and the second-order kinetics equations. Evaluation of the experimental kinetics data have shown that the adsorption of BSA by MWNT followed the pseudo-first-order kinetics. The pseudo-first order adsorption rate constants at pH 4 and 5 decreased with an increase in temperature which results in a decrease in diffusion rate of BSA molecules across the external boundary layer, and favors the sorption process. The adsorption behavior of protein by carbon nanotubes was explained also using the zeta potential measurements. The adsorption capacity decreased with increasing pH due to the electrostatic repulsions. The thermodynamic parameters evaluated to predict the nature of adsorption confirmed the non-spontaneous and endothermic behaviour of the BSA/MWNT adsorption process. Adsorption standard enthalpy values were found as ∆H0=59.5 kJ mol−1 and ∆H0=14.3 kJ mol−1 for pH 4 and 5, respectively indicating that the protein molecules are adsorbed electrostatically on the carbon nanotubes.
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Sevilla P, Vining KV, Dotor J, Rodriguez D, Gil FJ, Aparicio C. Surface immobilization and bioactivity of TGF-β1 inhibitor peptides for bone implant applications. J Biomed Mater Res B Appl Biomater 2015; 104:385-94. [DOI: 10.1002/jbm.b.33374] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 11/21/2014] [Accepted: 01/17/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Pablo Sevilla
- Department of Mechanical Engineering; Escola Universitària Salesiana de Sarrià. Pg. Sant Joan Bosco 74; 08017 Barcelona Spain
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia, Pav. E; Av. Diagonal 647 Barcelona Spain
| | - Kyle V. Vining
- MDRCBB-Minnesota Dental Research Center for Biomechanics and Biomaterials, Department of Restorative Sciences, University of Minnesota School of Dentistry; 16-250A Moos Tower 515 Delaware St. SE Minneapolis MN 55455 USA
| | - Javier Dotor
- DIGNA Biotech, R+D Department. Calle Orense 85, Edificio Lexington; 28020 Madrid Spain
| | - Daniel Rodriguez
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia, Pav. E; Av. Diagonal 647 Barcelona Spain
| | - F. Javier Gil
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Technical University of Catalonia, Pav. E; Av. Diagonal 647 Barcelona Spain
| | - Conrado Aparicio
- MDRCBB-Minnesota Dental Research Center for Biomechanics and Biomaterials, Department of Restorative Sciences, University of Minnesota School of Dentistry; 16-250A Moos Tower 515 Delaware St. SE Minneapolis MN 55455 USA
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Mohammed AA, Haris SM, Nuawi MZ. Using the pressure transmission coefficient of a transmitted wave to evaluate some of the mechanical properties of refractory metals. ULTRASONICS 2015; 55:133-140. [PMID: 25096851 DOI: 10.1016/j.ultras.2014.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 06/30/2014] [Accepted: 07/01/2014] [Indexed: 06/03/2023]
Abstract
Refractory metals have attracted increasing interest in recent years because of their use in many high-temperature applications. However, the characteristics of these metals calculated using loaded tests (such as tensile strength tests) differ considerably from those calculated using one of the most famous methods in NDT which is called time of flying of the wave (TOF).The present study presents two solutions based on calculating the pressure transmission coefficient (PTC) of the transmitted wave between the test sample and magnesium metal. The first is based on the development of a highly accurate algorithm that lowers the cost by determining the acoustic impedance of the test specimen to calculating mechanical properties. Up to 26 theoretical tests were done (10 of these tests for refractory materials) according to their known mechanical properties to verify the accuracy of the algorithm. The convergence in results ranged from 92% to 99%. The second solution was designed to solve the same problem for specimens with a thickness of less than 1mm. Eight experimental tests were done (five using refractory materials) to verify the accuracy of the second solution, with the convergence in the results ranging from 94% to 97%. The relationships of the Vrms measured from the oscilloscope with the PTC and with the Fourier transform spectrum were derived. The results of this research were closer to the standard mechanical properties for refractory metals compared with several recent acoustic tests.
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Affiliation(s)
- Arshed Abdulhamed Mohammed
- Electronic Department, College of Engineering, Diyala University, Iraq; Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia.
| | - Sallehuddin Mohamed Haris
- Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia
| | - Mohd Zaki Nuawi
- Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia
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Lefaix H, Galtayries A, Prima F, Marcus P. Nano-size protein at the surface of a Ti–Zr–Ni quasi-crystalline alloy: Fibronectin adsorption on metallic nano-composites. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Matheron L, Sachon E, Burlina F, Sagan S, Lequin O, Bolbach G. Sequence-Dependent Enrichment of a Model Phosphopeptide: A Combined MALDI-TOF and NMR Study. Anal Chem 2011; 83:3003-10. [DOI: 10.1021/ac103134e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lucrèce Matheron
- Université P. et M. Curie Paris 6, UMR 7203 CNRS-UPMC-ENS, 4, Place Jussieu, 75005 Paris, Ecole Normale Supérieure, Département de Chimie, 24, rue Lhomond, 75005 Paris, France
- Plateforme de Spectrométrie de Masse et Protéomique, Université P. et M. Curie, IFR83, 7-9 Quai Saint Bernard, 75005 Paris, France
| | - Emmanuelle Sachon
- Université P. et M. Curie Paris 6, UMR 7203 CNRS-UPMC-ENS, 4, Place Jussieu, 75005 Paris, Ecole Normale Supérieure, Département de Chimie, 24, rue Lhomond, 75005 Paris, France
- Plateforme de Spectrométrie de Masse et Protéomique, Université P. et M. Curie, IFR83, 7-9 Quai Saint Bernard, 75005 Paris, France
| | - Fabienne Burlina
- Université P. et M. Curie Paris 6, UMR 7203 CNRS-UPMC-ENS, 4, Place Jussieu, 75005 Paris, Ecole Normale Supérieure, Département de Chimie, 24, rue Lhomond, 75005 Paris, France
| | - Sandrine Sagan
- Université P. et M. Curie Paris 6, UMR 7203 CNRS-UPMC-ENS, 4, Place Jussieu, 75005 Paris, Ecole Normale Supérieure, Département de Chimie, 24, rue Lhomond, 75005 Paris, France
| | - Olivier Lequin
- Université P. et M. Curie Paris 6, UMR 7203 CNRS-UPMC-ENS, 4, Place Jussieu, 75005 Paris, Ecole Normale Supérieure, Département de Chimie, 24, rue Lhomond, 75005 Paris, France
| | - Gérard Bolbach
- Université P. et M. Curie Paris 6, UMR 7203 CNRS-UPMC-ENS, 4, Place Jussieu, 75005 Paris, Ecole Normale Supérieure, Département de Chimie, 24, rue Lhomond, 75005 Paris, France
- Plateforme de Spectrométrie de Masse et Protéomique, Université P. et M. Curie, IFR83, 7-9 Quai Saint Bernard, 75005 Paris, France
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Imamura K, Oshita M, Iwai M, Kuroda T, Watanabe I, Sakiyama T, Nakanishi K. Influences of properties of protein and adsorption surface on removal kinetics of protein adsorbed on metal surface by H2O2-electrolysis treatment. J Colloid Interface Sci 2010; 345:474-80. [PMID: 20199779 DOI: 10.1016/j.jcis.2010.01.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Revised: 01/24/2010] [Accepted: 01/27/2010] [Indexed: 10/19/2022]
Abstract
"H(2)O(2)-electrolysis" treatment is an alternative method for removing proteinaceous materials that are adsorbed to metal surfaces. The method is based on the generation of hydroxyl radicals by electrolysis of hydrogen peroxide and the subsequent decomposition of organic substances adhering to the metal surface. We herein investigated the influence of some parameters on the kinetics of protein removal by H(2)O(2)-electrolysis. These parameters included the properties of proteins and the type of metal surface. Sixteen types of proteins and nine types of metal surfaces were used. The removal of adsorbed protein from a metal surface during the treatment was monitored by ellipsometry. Apparent first-order rate constants for removal, k(c)(l), for various adsorption and treatment conditions were determined. The k(c)(l) value varied markedly with the type of protein and was also influenced by the pH used in the adsorption. The isoelectric point (pI) of protein used was found to be a major factor. The amount of adsorbed protein removed by a unit amount of (·)OH was larger for a metal surface with a lower pI. The impact of the properties of the protein and metal surface on the removal kinetics are discussed, focusing on relationships with the adsorption characteristics of the protein.
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Affiliation(s)
- Koreyoshi Imamura
- Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Okayama 700-8530, Japan.
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Variola F, Nanci A, Rosei F. Assessment of the titanium dioxide absorption coefficient by grazing-angle Fourier transform infrared and ellipsometric measurements. APPLIED SPECTROSCOPY 2009; 63:1187-1190. [PMID: 19843371 DOI: 10.1366/000370209789553129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Fabio Variola
- INRS-EMT, Université du Québec, 1650 Boul. Lionel-Boulet, Varennes, QC, J3X 1S2, Canada
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Imamura K, Shimomura M, Nagai S, Akamatsu M, Nakanishi K. Adsorption characteristics of various proteins to a titanium surface. J Biosci Bioeng 2009; 106:273-8. [PMID: 18930005 DOI: 10.1263/jbb.106.273] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Accepted: 06/17/2008] [Indexed: 11/17/2022]
Abstract
Adsorption characteristics of 18 proteins, with different sizes and isoelectric points, to a titanium oxide surface were studied. The adsorption isotherms were categorized based on protein type and pH: type 1, irreversible adsorption; type 2, Langmuir-type reversible adsorption; and type 3, reversible and irreversible adsorption. Most of the proteins tested were irreversibly adsorbed in the pH range of 3-8, whereas most adsorbed reversibly at pH 8.5-9.4. Protamine, with a pI value of 12, adsorbed reversibly in the pH range of 3-9. pH values that gave maximal sums of irreversibly and reversibly adsorbed proteins were in the pH range of 3-8 and tended to increase slightly with the pI value of the corresponding protein. pH values that gave maximal quantities of irreversibly adsorbed protein ranged between 4-6 and were nearly independent of pI.
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Affiliation(s)
- Koreyoshi Imamura
- Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Tsushima-Naka, Okayama 700-8530, Japan
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Imamura K, Kawasaki Y, Nagayasu T, Sakiyama T, Nakanishi K. Adsorption characteristics of oligopeptides composed of acidic and basic amino acids on titanium surface. J Biosci Bioeng 2007; 103:7-12. [PMID: 17298894 DOI: 10.1263/jbb.103.7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2006] [Accepted: 09/28/2006] [Indexed: 11/17/2022]
Abstract
The adsorption characteristics of octapeptides, containing different numbers of aspartic acid, lysine, and alanine residues (i.e., D(4)K(0)A(4), D(4)K(1)A(3), D(4)K(3)A(1), D(4)K(4)A(0), and D(0)K(4)A(4)) on the surface of titanium (Ti) particles were investigated in the pH range of 3.0-8.8 at 30 degrees C. The adsorption isotherms for octapeptides having four plural aspartic acid residues with or without lysine residues showed two distinct adsorption modes, i.e., irreversible and reversible modes, at pHs 3.0-6.5; at pH 7.0 or higher, the adsorption mode was reversible. Increasing the number of lysine residues at a fixed number of aspartic acid residues (i.e., 4) decreased the amount of peptides adsorbed in both modes. D(4)K(4)A(0) adsorbed irreversibly at pHs 3.0-6.5, due to the fact that negatively charged carboxyl groups directly interact with a positively charged Ti surface, whereas positively charged amino groups of lysine residues are directed in an opposite direction toward the solution side, as predicted by molecular mechanics/dynamics calculations.
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Affiliation(s)
- Koreyoshi Imamura
- Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University, Tsushima-naka, Okayama 700-8530, Japan
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Abstract
Experiments on Zn2+ and Cd2+ adsorptions on vermiculite in aqueous solutions were conducted to investigate the widely observed adsorbent concentration effect on the traditionally defined adsorption isotherm in the adsorbate range 25-500 mg/L and adsorbent range 10-150 g/L. The results showed that the equilibrium ion adsorption density did not correspond to a unique equilibrium ion concentration in liquid phase. Three adsorbate/adsorbent ratios, the equilibrium adsorption density, the ratio of equilibrium adsorbate concentration in liquid phase to adsorbent concentration, and the ratio of initial adsorbate concentration to adsorbent concentration, were found to be related with unique values in the tested range. Based on the assumption that the equilibrium state of a liquid/solid adsorption system is determined by four mutually related components: adsorbate in liquid phase, adsorbate in solid phase, uncovered adsorption site and covered adsorption site, and that the equilibrium chemical potentials of these components should be equalized, a new model was presented for describing ion adsorption isotherm in liquid/solid systems. The proposed model fit well the experimental data obtained from the examined samples.
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Affiliation(s)
- Xiao-fu Wu
- College of Resource and Environment, Central South University of Forestry and Technology, Changsha 410004, China.
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