1
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Kumaki J. In Situ Real-Time Atomic Force Microscopy Observation of the Surface Mobility on Each Domain of a Polystyrene- b-poly(methyl methacrylate) Film at High Temperatures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38857434 DOI: 10.1021/acs.langmuir.4c00648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
The surface chain movements within the microdomains of a polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) and corresponding homopolymer films were observed via in situ real-time atomic force microscopy (AFM) at high temperatures and analyzed quantitatively using particle image velocimetry (PIV). At low temperatures, mobility within the PS microdomains resembled that within the PS homopolymer film, but movements in the PMMA microdomains were notably accelerated compared to the PMMA homopolymer. Conversely, at high temperatures, mobility within both PS and PMMA microdomains was considerably suppressed compared to their respective homopolymer films, likely owing to the fixed linkage of the block chains at the microdomain interface. This combination of real-time AFM observation and PIV analysis is an effective method for quantitatively evaluating surface chain mobility in real space.
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Affiliation(s)
- Jiro Kumaki
- Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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2
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Kumaki J. In Situ Real-Time Atomic Force Microscopy Observations of Chain Mobility at Polymer/Water Interfaces of Poly(methyl methacrylate), Poly(2-hydroxyethyl methacrylate), and Poly(2-methoxyethyl methacrylate) Films in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5270-5277. [PMID: 38422988 DOI: 10.1021/acs.langmuir.3c03699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Polymer materials are widely used in water or in contact with an aqueous environment. However, evaluating the chain mobility, a crucial parameter, at a polymer-water interface is challenging. In this study, we, for the first time, observed poly(methyl methacrylate) (PMMA), poly(2-hydroxyethyl methacrylate) (PHEMA), and poly(2-methoxyethyl methacrylate) (PMEMA) film surfaces in water via in situ real-time atomic force microscopy (AFM) in tapping mode and quantified the chain mobility. The average displacement between adjacent images (nm/8.75 min) was evaluated using particle image velocimetry. The displacement of PMMA, which has a high bulk glass-transition temperature (Tg) (108 °C) and exhibits limited water absorption, was low both in air (0.54 nm/8.75 min) and water (0.86), while PHEMA, which has a high bulk Tg (99 °C) and exhibits high water absorption, exhibited low mobility in air (0.40) but two orders of magnitude higher mobility in water (60). PMEMA, which has a low bulk Tg (14 °C) and exhibits limited water absorption, already started to move in air (4.5), and its mobility moderately increased in water (20). These behaviors were reasonable, considering the bulk Tg and water absorption characteristics of the polymers. Further, the chain mobility in water was compared with that of dried samples at high temperatures in air. The mobility of PMMA, PHEMA, and PMEMA in water corresponded to that of the dried samples observed in air below the surface Tg (97 °C) for PMMA, at ∼125 °C for PHEMA, and at ∼35 °C for PMEMA. In situ real-time AFM analysis of polymer materials in water is an effective method for evaluating the chain mobility at the polymer/water interface.
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Affiliation(s)
- Jiro Kumaki
- Emeritus Professor, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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3
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Koike K, Kumaki J. Chain Movements at the Topmost Surface of Poly(methyl methacrylate) and Polystyrene Films Directly Evaluated by In Situ High-Temperature Atomic Force Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13707-13719. [PMID: 36318939 PMCID: PMC9671121 DOI: 10.1021/acs.langmuir.2c01788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/28/2022] [Indexed: 06/16/2023]
Abstract
The surfaces of polymeric materials are thermodynamically unstable, and the glass-transition temperature (Tg) is significantly lower than that in the bulk material. However, the mobility of the chains at the top of the surface has never been directly evaluated. In this study, the movements of the topmost chains of poly(methyl methacrylate) (PMMA) and polystyrene (PS) bulk films were observed in situ at high temperatures with atomic force microscopy in tapping mode. PMMA and PS chains started moving at ∼97 and ∼50 °C, respectively, which were slightly and significantly below the values of their bulk Tg (PMMA, 108 °C; PS, 104 °C), respectively. The activation energies of the apparent diffusion constants of PMMA and PS, derived by particle image velocimetry analysis, were 193 and 151 kJ mol-1, respectively, and reasonable for the glass transition. Movements of isolated PMMA chains deposited on a PMMA film by the Langmuir-Blodgett technique were also observed and confirmed to be essentially the same as those on the PMMA film surface.
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Affiliation(s)
- Kouki Koike
- Department of Organic Materials Science,
Graduate School of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Jiro Kumaki
- Department of Organic Materials Science,
Graduate School of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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4
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Pal R, Sikder AK, Saito K, Funston AM, Bellare JR. Study of polycarbonate‐polystyrene interfaces using Scanning Transmission Electron
Microscopy‐Spectrum
Imaging (
STEM‐SI
). POLYM INT 2022. [DOI: 10.1002/pi.6451] [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]
Affiliation(s)
- Ruchi Pal
- IITB‐Monash Research Academy IIT Bombay Mumbai 400076 India
| | - Arun K. Sikder
- SABIC Research and Technology Pvt. Ltd. Bengaluru 562125 India
| | - Kei Saito
- School of Chemistry, Monash University Clayton Victoria 3800 Australia
| | - Alison M. Funston
- School of Chemistry, Monash University Clayton Victoria 3800 Australia
- ARC Centre of Excellence in Exciton Science, School of Chemistry Monash University Clayton Victoria 3800 Australia
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5
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Busi F, Turbant F, Waeytens J, El Hamoui O, Wien F, Arluison V. Evaluation of Amyloid Inhibitor Efficiency to Block Bacterial Survival. Methods Mol Biol 2022; 2538:145-163. [PMID: 35951299 DOI: 10.1007/978-1-0716-2529-3_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Amyloid inhibitors, such as the green tea compound epigallocatechin gallate EGCG, apomorphine or curlicide, have antibacterial properties. Conversely, antibiotics such as tetracycline derivatives or rifampicin also affect eukaryotic amyloids formation and may be used to treat neurodegenerative diseases. This opens the possibility for existing drugs to be repurposed in view of new therapy, targeting amyloid-like proteins from eukaryotes to prokaryotes and conversely. Here we present how to evaluate the effect of these amyloid-forming inhibitors on bacterial amyloid self-assemblies in vitro and on bacterial survival. The different approaches possible are presented.
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Affiliation(s)
- Florent Busi
- Université Paris Cité, BFA, UMR 8251, CNRS, Paris, France.
- Université Paris Cité, Paris, France.
| | - Florian Turbant
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR 12, Université Paris Saclay, CEA Saclay, Gif-sur-Yvette, France
| | - Jehan Waeytens
- Structure et Fonction des Membranes Biologiques, Université libre de Bruxelles, Bruxelles, Belgium
- Institut de Chimie Physique, CNRS UMR8000, Université Paris-Sud, Université Paris-Saclay, Orsay, France
| | - Omar El Hamoui
- DISCO Beamline, Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, Gif-sur-Yvette, France
| | - Frank Wien
- DISCO Beamline, Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, Gif-sur-Yvette, France
| | - Véronique Arluison
- Université Paris Cité, Paris, France
- Laboratoire Léon Brillouin LLB, CEA, CNRS UMR 12, Université Paris Saclay, CEA Saclay, Gif-sur-Yvette, France
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6
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Padhye N, Vallabh A. Deformation‐induced
bonding of polymer films below the glass transition temperature. J Appl Polym Sci 2021. [DOI: 10.1002/app.50934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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7
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Baij L, Hermans JJ, Keune K, Iedema P. Time-Dependent ATR-FTIR Spectroscopic Studies on Fatty Acid Diffusion and the Formation of Metal Soaps in Oil Paint Model Systems. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lambert Baij
- Van't Hoff Institute for Molecular Sciences; University of Amsterdam; P.O. Box 94720 1090GD Amsterdam The Netherlands
- Rijksmuseum Amsterdam, Conservation and Restoration; P.O. Box 74888 1070DN Amsterdam The Netherlands
| | - Joen J. Hermans
- Van't Hoff Institute for Molecular Sciences; University of Amsterdam; P.O. Box 94720 1090GD Amsterdam The Netherlands
- Rijksmuseum Amsterdam, Conservation and Restoration; P.O. Box 74888 1070DN Amsterdam The Netherlands
| | - Katrien Keune
- Van't Hoff Institute for Molecular Sciences; University of Amsterdam; P.O. Box 94720 1090GD Amsterdam The Netherlands
- Rijksmuseum Amsterdam, Conservation and Restoration; P.O. Box 74888 1070DN Amsterdam The Netherlands
| | - Piet Iedema
- Van't Hoff Institute for Molecular Sciences; University of Amsterdam; P.O. Box 94720 1090GD Amsterdam The Netherlands
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8
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Baij L, Hermans JJ, Keune K, Iedema P. Time-Dependent ATR-FTIR Spectroscopic Studies on Fatty Acid Diffusion and the Formation of Metal Soaps in Oil Paint Model Systems. Angew Chem Int Ed Engl 2018; 57:7351-7354. [PMID: 29411920 PMCID: PMC6033171 DOI: 10.1002/anie.201712751] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/23/2018] [Indexed: 11/06/2022]
Abstract
The formation of metal soaps (metal complexes of saturated fatty acids) is a serious problem affecting the appearance and structural integrity of many oil paintings. Tailored model systems for aged oil paint and time-dependent attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy were used to study the diffusion of palmitic acid and subsequent metal soap crystallization. The simultaneous presence of free saturated fatty acids and polymer-bound metal carboxylates leads to rapid metal soap crystallization, following a complex mechanism that involves both acid and metal diffusion. Solvent flow, water, and pigments all enhance metal soap crystallization in the model systems. These results contribute to the development of paint cleaning strategies, a better understanding of oil paint degradation, and highlight the potential of time-dependent ATR-FTIR spectroscopy for studying dynamic processes in polymer films.
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Affiliation(s)
- Lambert Baij
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94720, 1090GD, Amsterdam, The Netherlands.,Rijksmuseum Amsterdam, Conservation and Restoration, P.O. Box 74888, 1070DN, Amsterdam, The Netherlands
| | - Joen J Hermans
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94720, 1090GD, Amsterdam, The Netherlands.,Rijksmuseum Amsterdam, Conservation and Restoration, P.O. Box 74888, 1070DN, Amsterdam, The Netherlands
| | - Katrien Keune
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94720, 1090GD, Amsterdam, The Netherlands.,Rijksmuseum Amsterdam, Conservation and Restoration, P.O. Box 74888, 1070DN, Amsterdam, The Netherlands
| | - Piet Iedema
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94720, 1090GD, Amsterdam, The Netherlands
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9
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Nam C, Zimudzi TJ, Wiencek RA, Chung TM, Hickner MA. Improved ATR-FTIR detection of hydrocarbons in water with semi-crystalline polyolefin coatings on ATR elements. Analyst 2018; 143:5589-5596. [DOI: 10.1039/c8an01280f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ detection of hydrocarbons in water using ATR-FTIR with LLDPE film.
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Affiliation(s)
- Changwoo Nam
- Department of Materials Science and Engineering
- The Pennsylvania State University
- University Park
- USA
- Department of Chemical Engineering
| | - Tawanda J. Zimudzi
- Department of Materials Science and Engineering
- The Pennsylvania State University
- University Park
- USA
- Materials Research Institute
| | - Richard A. Wiencek
- Department of Materials Science and Engineering
- The Pennsylvania State University
- University Park
- USA
| | - T.C. Mike Chung
- Department of Materials Science and Engineering
- The Pennsylvania State University
- University Park
- USA
| | - Michael A. Hickner
- Department of Materials Science and Engineering
- The Pennsylvania State University
- University Park
- USA
- Materials Research Institute
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10
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Vásquez-Rivera A, Sommer KK, Oldenhof H, Higgins AZ, Brockbank KGM, Hilfiker A, Wolkers WF. Simultaneous monitoring of different vitrification solution components permeating into tissues. Analyst 2018; 143:420-428. [DOI: 10.1039/c7an01576c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cryopreservation can be used for long-term preservation of tissues and organs.
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Affiliation(s)
| | - Kim K. Sommer
- Institute of Multiphase Processes
- Leibniz Universität Hannover
- Hannover
- Germany
| | - Harriëtte Oldenhof
- Unit for Reproductive Medicine
- Clinic for Horses
- University of Veterinary Medicine Hannover
- Hannover
- Germany
| | - Adam Z. Higgins
- School of Chemical
- Biological and Environmental Engineering
- Oregon State University
- Corvallis
- USA
| | | | - Andres Hilfiker
- Leibniz Research Laboratories for Biotechnology and Artificial Organs
- Hannover Medical School
- Hannover
- Germany
| | - Willem F. Wolkers
- Institute of Multiphase Processes
- Leibniz Universität Hannover
- Hannover
- Germany
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11
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Karimi M, Tashvigh AA, Asadi F, Ashtiani FZ. Determination of concentration-dependent diffusion coefficient of seven solvents in polystyrene systems using FTIR-ATR technique: experimental and mathematical studies. RSC Adv 2016. [DOI: 10.1039/c5ra25244j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study a new mathematical model's outcome based on experimental data is considered to determine the diffusion coefficients in polystyrene/solvent systems as a function of solvent concentration.
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Affiliation(s)
- Mohammad Karimi
- Department of Textile Engineering
- Amirkabir University of Technology
- 15914 Tehran
- Iran
| | - Akbar Asadi Tashvigh
- Department of Chemical Engineering
- Amirkabir University of Technology
- 15914 Tehran
- Iran
| | - Fateme Asadi
- Department of Textile Engineering
- Amirkabir University of Technology
- 15914 Tehran
- Iran
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12
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Wang S, Oldenhof H, Goecke T, Ramm R, Harder M, Haverich A, Hilfiker A, Wolkers WF. Sucrose Diffusion in Decellularized Heart Valves for Freeze-Drying. Tissue Eng Part C Methods 2015; 21:922-31. [PMID: 25809201 DOI: 10.1089/ten.tec.2014.0681] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Decellularized heart valves can be used as starter matrix implants for heart valve replacement therapies in terms of guided tissue regeneration. Decellularized matrices ideally need to be long-term storable to assure off-the-shelf availability. Freeze-drying is an attractive preservation method, allowing storage at room temperature in a dried state. However, the two inherent processing steps, freezing and drying, can cause severe damage to extracellular matrix (ECM) proteins and the overall tissue histoarchitecture and thus impair biomechanical characteristics of resulting matrices. Freeze-drying therefore requires a lyoprotective agent that stabilizes endogenous structural proteins during both substeps and that forms a protective glassy state at room temperature. To estimate incubation times needed to infiltrate decellularized heart valves with the lyoprotectant sucrose, temperature-dependent diffusion studies were done using Fourier transform infrared spectroscopy. Glycerol, a cryoprotective agent, was studied for comparison. Diffusion of both protectants was found to exhibit Arrhenius behavior. The activation energies of sucrose and glycerol diffusion were found to be 15.9 and 37.7 kJ·mol(-1), respectively. It was estimated that 4 h of incubation at 37°C is sufficient to infiltrate heart valves with sucrose before freeze-drying. Application of a 5% sucrose solution was shown to stabilize acellular valve scaffolds during freeze-drying. Such freeze-dried tissues, however, displayed pores, which were attributed to ice crystal damage, whereas vacuum-dried scaffolds in comparison revealed no pores after drying and rehydration. Exposure to a hygroscopic sucrose solution (80%) before freeze-drying was shown to be an effective method to diminish pore formation in freeze-dried ECMs: matrix structures closely resembled those of control samples that were not freeze-dried. Heart valve matrices were shown to be in a glassy state after drying, suggesting that they can be stored at room temperature.
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Affiliation(s)
- Shangping Wang
- 1 Institute of Multiphase Processes, Leibniz Universität Hannover , Hannover, Germany
| | - Harriëtte Oldenhof
- 2 Clinic for Horses-Unit for Reproductive Medicine, University of Veterinary Medicine Hannover , Hannover, Germany
| | - Tobias Goecke
- 3 Leibniz Research Laboratories for Biotechnology and Artificial Organs, Hannover Medical School , Hannover, Germany
| | - Robert Ramm
- 3 Leibniz Research Laboratories for Biotechnology and Artificial Organs, Hannover Medical School , Hannover, Germany
| | | | - Axel Haverich
- 3 Leibniz Research Laboratories for Biotechnology and Artificial Organs, Hannover Medical School , Hannover, Germany
| | - Andres Hilfiker
- 3 Leibniz Research Laboratories for Biotechnology and Artificial Organs, Hannover Medical School , Hannover, Germany
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13
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The effect of processing on the surface physical stability of amorphous solid dispersions. Eur J Pharm Biopharm 2014; 88:897-908. [DOI: 10.1016/j.ejpb.2014.07.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 07/01/2014] [Accepted: 07/09/2014] [Indexed: 11/19/2022]
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14
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Wang S, Oldenhof H, Dai X, Haverich A, Hilfiker A, Harder M, Wolkers WF. Protein stability in stored decellularized heart valve scaffolds and diffusion kinetics of protective molecules. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1844:430-8. [PMID: 24321313 DOI: 10.1016/j.bbapap.2013.11.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 11/09/2013] [Accepted: 11/27/2013] [Indexed: 11/26/2022]
Abstract
Decellularized tissues can be used as matrix implants. The aims of this study were to investigate protein stability and solvent accessibility in decellularized pulmonary heart valve tissues. Protein denaturation profiles of tissues were studied by differential scanning calorimetry. Protein solvent accessibility of tissue exposed to D2O, and diffusion kinetics of various protective molecules were studied by Fourier transform infrared spectroscopy. Little changes were observed in the protein denaturation temperature during storage, at either 5 or 40°C. Glycerol was found to stabilize proteins; it increased the protein denaturation temperature. The stabilizing effect of glycerol disappeared after washing the sample with saline solution. Hydrogen-to-deuterium exchange rates of protein amide groups were fastest in leaflet tissue, followed by artery and muscle tissue. Diffusion of glycerol was found to be fastest in muscle tissue, followed by artery and leaflet tissue. Diffusion coefficients were derived and used to estimate the time needed to reach saturation. Fixation of tissue with glutaraldehyde had little effects on exchange and diffusion rates. Diffusion rates decreased with increasing molecular size. Proteins in decellularized heart valve tissue are stable during storage. Glycerol increases protein stability in a reversible manner. Solvent accessibility studies of protein amide groups provide an additional tool to study proteins in tissues. Diffusion coefficients can be derived to simulate diffusion kinetics of protective molecules in tissues. This study provides novel tools to evaluate protein stability and solvent accessibility in tissues, which can be used to develop biopreservation strategies.
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Affiliation(s)
- Shangping Wang
- Institute of Multiphase Processes, Leibniz Universität Hannover, Hannover, Germany
| | - Harriëtte Oldenhof
- Clinic for Horses - Unit for Reproductive Medicine, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Xiaolei Dai
- Institute of Multiphase Processes, Leibniz Universität Hannover, Hannover, Germany
| | - Axel Haverich
- Leibniz Research Laboratories for Biotechnology and Artificial Organs, Hannover Medical School, Hannover, Germany
| | - Andres Hilfiker
- Leibniz Research Laboratories for Biotechnology and Artificial Organs, Hannover Medical School, Hannover, Germany
| | | | - Willem F Wolkers
- Institute of Multiphase Processes, Leibniz Universität Hannover, Hannover, Germany.
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15
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Qi S, Moffat JG, Yang Z. Early Stage Phase Separation in Pharmaceutical Solid Dispersion Thin Films under High Humidity: Improved Spatial Understanding Using Probe-Based Thermal and Spectroscopic Nanocharacterization Methods. Mol Pharm 2013; 10:918-30. [DOI: 10.1021/mp300557q] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sheng Qi
- School of Pharmacy, University of East Anglia, Norwich, Norfolk, NR4 7TJ, United Kingdom
| | - Jonathan G. Moffat
- School of Pharmacy, University of East Anglia, Norwich, Norfolk, NR4 7TJ, United Kingdom
| | - Ziyi Yang
- School of Pharmacy, University of East Anglia, Norwich, Norfolk, NR4 7TJ, United Kingdom
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16
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Liao Y, Nakagawa A, Horiuchi S, Ougizawa T. Interdiffusion at Homopolymer/Random Copolymer Interfaces Investigated by Energy-Filtering Transmission Electron Microscopy. Macromolecules 2007. [DOI: 10.1021/ma071535g] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yonggui Liao
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Ayumi Nakagawa
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Shin Horiuchi
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Toshiaki Ougizawa
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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17
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Giacinti Baschetti M, Piccinini E, Barbari TA, Sarti GC. Quantitative Analysis of Polymer Dilation during Sorption Using FTIR-ATR Spectroscopy. Macromolecules 2003. [DOI: 10.1021/ma0302457] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marco Giacinti Baschetti
- Dip. Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Università degli Studi di Bologna, viale Risorgimento 2 40136 Bologna Italy, and Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742
| | - Enrico Piccinini
- Dip. Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Università degli Studi di Bologna, viale Risorgimento 2 40136 Bologna Italy, and Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742
| | - Timothy A. Barbari
- Dip. Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Università degli Studi di Bologna, viale Risorgimento 2 40136 Bologna Italy, and Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742
| | - Giulio C. Sarti
- Dip. Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Università degli Studi di Bologna, viale Risorgimento 2 40136 Bologna Italy, and Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742
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18
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Elabd YA, Baschetti MG, Barbari TA. Time-resolved Fourier transform infrared/attenuated total reflection spectroscopy for the measurement of molecular diffusion in polymers. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10661] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Shen Y, Wu P. Two-Dimensional ATR−FTIR Spectroscopic Investigation on Water Diffusion in Polypropylene Film: Water Bending Vibration. J Phys Chem B 2003. [DOI: 10.1021/jp0269975] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yi Shen
- Department of Macromolecular Science and The Key Laboratory of Polymer Engineering Science, Fudan University, Shanghai, 200433, China
| | - Peiyi Wu
- Department of Macromolecular Science and The Key Laboratory of Polymer Engineering Science, Fudan University, Shanghai, 200433, China
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20
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Goodelle JP, Pearson RA, Santore MM. Water-uptake kinetics in poly(methyl methacrylate) films with a fluorescent rotor probe. J Appl Polym Sci 2002. [DOI: 10.1002/app.10964] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Bairamov DF, Chalykh AE, Feldstein MM, Siegel RA, Platé NA. Dissolution and mutual diffusion of poly(N-vinyl pyrrolidone) in short-chain poly(ethylene glycol) as observed by optical wedge microinterferometry. J Appl Polym Sci 2002. [DOI: 10.1002/app.10635] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Ribar T, Koenig JL, Bhargava R. FTIR Imaging of Polymer Dissolution. 2. Solvent/Nonsolvent Mixtures. Macromolecules 2001. [DOI: 10.1021/ma011152x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Travis Ribar
- Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
| | - Jack L. Koenig
- Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
| | - Rohit Bhargava
- Laboratory of Chemical Physics, NIDDK, National Institutes of Health, Bethesda, Maryland 20892
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23
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Ribar T, Bhargava R, Koenig JL. FT-IR Imaging of Polymer Dissolution by Solvent Mixtures. 1. Solvents. Macromolecules 2000. [DOI: 10.1021/ma000851r] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Travis Ribar
- Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
| | - Rohit Bhargava
- Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
| | - Jack L. Koenig
- Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
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24
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Yi X, Portnoy J, Pellegrino J. Diffusion measurements using ATR-FTIR spectroscopy: Acetone diffusion in polypropylene?use of penetrant fluid pressure to improve sample/IRE contact. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1099-0488(20000701)38:13<1773::aid-polb110>3.0.co;2-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Cantor AS. Drug and excipient diffusion and solubility in acrylate adhesives measured by infrared-attenuated total reflectance (IR-ATR) spectroscopy. J Control Release 1999; 61:219-31. [PMID: 10469917 DOI: 10.1016/s0168-3659(99)00119-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Infrared-attenuated total reflectance (IR-ATR) was used to measure drug and excipient diffusion in acrylate pressure-sensitive adhesives. The first part describes diffusion of drug and excipient from one adhesive layer to another. The IR-ATR spectrometer is used to continuously monitor the rate at which drug and excipient diffuse into the 'receptor' adhesive layer. In this way, the ability of the drug and/or excipient to leave an adhesive can be determined without any influence of receptor fluids or skin membranes. Data is reported here for terpineol and testosterone diffusion in isooctyl acrylate (IOA) and IOA-acrylic acid (AA) adhesives. It is shown that the diffusion rate is much higher in IOA adhesive than in IOA-AA adhesive. The second part describes the use of IR-ATR to measure the solubility of liquids in adhesives. In this method, a liquid excipient is placed in direct contact with an adhesive layer containing no excipient. The IR-ATR spectrometer is used to continuously monitor the rate at which excipient diffuses into the 'receptor' adhesive layer. At equilibrium, the IR spectrum can be compared to both the pure adhesive spectrum and the pure excipient spectrum to determine the solubility of the excipient in the adhesive. Data are reported here for terpineol in an IOA adhesive and for several liquids in an IOA-vinyl acetate adhesive.
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Affiliation(s)
- A S Cantor
- 3M Pharmaceuticals, 3M Center, Building 270-4S-02, St. Paul, MN 55144-1000, USA.
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26
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Veniaminov AV, Sillescu H. Polymer and Dye Probe Diffusion in Poly(methyl methacrylate) below the Glass Transition Studied by Forced Rayleigh Scattering. Macromolecules 1999. [DOI: 10.1021/ma981312d] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrey V. Veniaminov
- Institut für Physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder-Weg 15, 55099 Mainz, Germany
| | - Hans Sillescu
- Institut für Physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder-Weg 15, 55099 Mainz, Germany
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27
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Laot CM, Marand E, Oyama HT. Spectroscopic characterization of molecular interdiffusion at a poly(vinyl pyrrolidone)/vinyl ester interface. POLYMER 1999. [DOI: 10.1016/s0032-3861(98)80003-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Balik C, Simendinger W. An attenuated total reflectance cell for analysis of small molecule diffusion in polymer thin films with Fourier-transform infrared spectroscopy. POLYMER 1998. [DOI: 10.1016/s0032-3861(97)10309-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Shearmur T, Clough A, Drew D, van der Grinten M, Jones R. Interdiffusion of deuterated and protonated poly(methyl methacrylate). POLYMER 1998. [DOI: 10.1016/s0032-3861(97)00513-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Sahlin JJ, Peppas NA. An Investigation of Polymer Diffusion in Hydrogel Laminates Using Near-Field FTIR Microscopy. Macromolecules 1996. [DOI: 10.1021/ma960870u] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jennifer J. Sahlin
- School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-1283
| | - Nikolaos A. Peppas
- School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-1283
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31
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Quijada-Garrido I, Barrales-Rienda JM, Frutos G. Diffusion of Erucamide (13-cis-Docosenamide) in Isotactic Polypropylene. Macromolecules 1996. [DOI: 10.1021/ma951392a] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- I. Quijada-Garrido
- Departamento de Química-Física de Polímeros, Instituto de Ciencia y Tecnología de Polímeros, Juan de la Cierva, 3, E-28006 Madrid, Spain, and Departamento de Estadística e Investigación Operativa, Facultad de Farmacia, Universidad Complutense, E-28040 Madrid, Spain
| | - J. M. Barrales-Rienda
- Departamento de Química-Física de Polímeros, Instituto de Ciencia y Tecnología de Polímeros, Juan de la Cierva, 3, E-28006 Madrid, Spain, and Departamento de Estadística e Investigación Operativa, Facultad de Farmacia, Universidad Complutense, E-28040 Madrid, Spain
| | - G. Frutos
- Departamento de Química-Física de Polímeros, Instituto de Ciencia y Tecnología de Polímeros, Juan de la Cierva, 3, E-28006 Madrid, Spain, and Departamento de Estadística e Investigación Operativa, Facultad de Farmacia, Universidad Complutense, E-28040 Madrid, Spain
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32
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Van Alsten JG. Ionic and Chain Interdiffusion and Interfacial Strength Development in Ionomers of Poly(ethylene-co-methacrylic acid). Macromolecules 1996. [DOI: 10.1021/ma950431f] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John G. Van Alsten
- Central Research & Development, E. I. du Pont de Nemours & Co., Experimental Station, Wilmington, Delaware 19880-0356
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