1
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Zhang X, Zhang J, Yang H, He C, Ke Y, Singh S, Cheng G. Determination of the Structures of Lignin Subunits and Nanoparticles in Solution by Small-Angle Neutron Scattering: Towards Improving Lignin Valorization. CHEMSUSCHEM 2022; 15:e202201230. [PMID: 35916324 DOI: 10.1002/cssc.202201230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/01/2022] [Indexed: 06/15/2023]
Abstract
Lignin nanoparticles (LNPs) are usually produced from lignin solution through supersaturation. The structure of the lignin in solution is still poorly understood due to structural variability of isolated lignins. Here, lignins were extracted from different plants to establish a general pattern of their structure in several lignin solvents. Lignin molecules (lignin subunits) and larger aggregates were observed in dimethyl sulfoxide (DMSO), ethylene glycol (EG) and 0.1 N NaOD solutions by small-angle neutron scattering (SANS). It was proposed that the aggregates were composed of lignin subunits with a higher molecular weight and a higher ratio of the aliphatic to phenolic hydroxyl groups. The size, shape, and compactness are important factors that affect the uses of the LNPs, which were obtained from the SANS data for the first time. A discrepancy in the radius between SANS and DLS was discovered, pointing to a large hydration shell around the LNPs in aqueous solutions. The cytotoxicity of the corncob lignin, kraft lignin, and their LNPs were measured and compared.
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Affiliation(s)
- Xin Zhang
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3rd Ring East, # 15, 100029, Beijing, P. R. China
- State Key Laboratory of Tribology, Tsinghua University, 100084, Beijing, P. R. China
| | - Jinxu Zhang
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3rd Ring East, # 15, 100029, Beijing, P. R. China
| | - Hua Yang
- Dongguan Neutron Source Science Center, 523803, Dongguan, P. R. China
- Institute of High Energy Physics, Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Chunyong He
- Dongguan Neutron Source Science Center, 523803, Dongguan, P. R. China
- Institute of High Energy Physics, Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Yubin Ke
- Dongguan Neutron Source Science Center, 523803, Dongguan, P. R. China
- Institute of High Energy Physics, Chinese Academy of Science, 100049, Beijing, P. R. China
| | - Seema Singh
- Deconstruction Division, Joint BioEnergy Institute (JBEI), 5885 Hollis Street, 94608, Emeryville, CA, USA
- Sandia National Laboratories, 7011 East Ave, 94551, Livermore, CA, USA
| | - Gang Cheng
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, North 3rd Ring East, # 15, 100029, Beijing, P. R. China
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2
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Kang JJ, Sachse C, Ko CH, Schroer MA, Vela SD, Molodenskiy D, Kohlbrecher J, Bushuev NV, Gumerov RA, Potemkin II, Jordan R, Papadakis CM. Rigid-to-Flexible Transition in a Molecular Brush in a Good Solvent at a Semidilute Concentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5226-5236. [PMID: 35166545 DOI: 10.1021/acs.langmuir.1c02589] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The structures of a molecular brush in a good solvent are investigated using synchrotron small-angle X-ray scattering in a wide range of concentrations. The brush under study, PiPOx239-g-PnPrOx14, features a relatively long poly(2-isopropenyl-2-oxazoline) (PiPOx) backbone and short poly(2-n-propyl-2-oxazoline) (PnPrOx) side chains. As a solvent, ethanol is used. By model fitting, the overall size and the persistence length as well as the interaction length and interaction strength are determined. At this, the interplay between form and structure factor is taken into account. The conformation of the molecular brush is traced upon increasing the solution concentration, and a rigid-to-flexible transition is found near the overlap concentration. Finally, the results of computer simulations of the molecular brush solutions confirm the experimental results.
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Affiliation(s)
- Jia-Jhen Kang
- Fachgebiet Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Clemens Sachse
- Professur für Makromolekulare Chemie, Fakultät Chemie und Lebensmittelchemie, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Chia-Hsin Ko
- Fachgebiet Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Martin A Schroer
- European Molecular Biology Laboratory, Hamburg Outstation, c/o Deutsches Elektronen-Synchrotron, Notkestr. 85, 22607 Hamburg, Germany
| | - Stefano Da Vela
- European Molecular Biology Laboratory, Hamburg Outstation, c/o Deutsches Elektronen-Synchrotron, Notkestr. 85, 22607 Hamburg, Germany
| | - Dmitry Molodenskiy
- European Molecular Biology Laboratory, Hamburg Outstation, c/o Deutsches Elektronen-Synchrotron, Notkestr. 85, 22607 Hamburg, Germany
| | - Joachim Kohlbrecher
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, Forschungsstr. 111, 5232 Villigen PSI, Switzerland
| | - Nikita V Bushuev
- Physics Department, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Rustam A Gumerov
- Physics Department, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Igor I Potemkin
- Physics Department, Lomonosov Moscow State University, Moscow 119991, Russian Federation
- National Research South Ural State University, Chelyabinsk 454080, Russian Federation
| | - Rainer Jordan
- Professur für Makromolekulare Chemie, Fakultät Chemie und Lebensmittelchemie, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Christine M Papadakis
- Fachgebiet Physik weicher Materie, Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
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3
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Xiao L, Li J, Peng G, Huang G. The effect of grafting density and side chain length on the conformation of PEG grafted bottlebrush polymers. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104736] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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4
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A molecular brush with thermoresponsive poly(2-ethyl-2-oxazoline) side chains: a structural investigation. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04704-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
AbstractThe thermoresponsive behavior of a poly(2-oxazoline)-based molecular brush is investigated in aqueous solution. The molecular brush under study, PiPOx100-g-PEtOx17, has a poly(2-isopropenyl-2-oxazoline) (PiPOx) backbone grafted with thermoresponsive poly(2-ethyl-2-oxazoline) (PEtOx) side chains. Since the backbone degree of polymerization is only a factor of ~ 6 higher than the ones of the side chains, it features an architecture between a star-like polymer and a comb-like polymer. Its aqueous solution exhibits lower critical solution temperature (LCST) behavior with a cloud point temperature Tcp = 40.5 °C at 30 g L−1. The temperature-dependent structural evolution is disclosed using dynamic light scattering (DLS) and small-angle neutron scattering (SANS). An increase of the molecular brush size is found upon heating from room temperature to Tcp, which is attributed to the extension of the backbone resulting from the dehydration and collapse of the side chains. Above Tcp, the size decreases again, which indicates the collapse of the whole molecular brush. Large aggregates are found to be present in the solution in the temperature range 25–50 °C. These become more compact, as the temperature is increased across Tcp.
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5
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Sunday DF, Martin TB, Chang AB, Burns AB, Grubbs RH. Addressing the challenges of modeling the scattering from bottlebrush polymers in solution. JOURNAL OF POLYMER SCIENCE 2020; 58:10.1002/pol.20190289. [PMID: 33305292 PMCID: PMC7724922 DOI: 10.1002/pol.20190289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 02/02/2020] [Indexed: 12/17/2022]
Abstract
Small-angle scattering measurements of complex macromolecules in solution are used to establish relationships between chemical structure and conformational properties. Interpretation of the scattering data requires an inverse approach where a model is chosen and the simulated scattering intensity from that model is iterated to match the experimental scattering intensity. This raises challenges in the case where the model is an imperfect approximation of the underlying structure, or where there are significant correlations between model parameters. We examine three bottlebrush polymers (consisting of polynorbornene backbone and polystyrene side chains) in a good solvent using a model commonly applied to this class of polymers: the flexible cylinder model. Applying a series of constrained Monte-Carlo Markov Chain analyses demonstrates the severity of the correlations between key parameters and the presence of multiple close minima in the goodness of fit space. We demonstrate that a shape-agnostic model can fit the scattering with significantly reduced parameter correlations and less potential for complex, multimodal parameter spaces. We provide recommendations to improve the analysis of complex macromolecules in solution, highlighting the value of Bayesian methods. This approach provides richer information for understanding parameter sensitivity compared to methods which produce a single, best fit.
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Affiliation(s)
- Daniel F. Sunday
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland
| | - Tyler B. Martin
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland
| | - Alice B. Chang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
| | - Adam B. Burns
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland
| | - Robert H. Grubbs
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
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6
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Zhulina EB, Sheiko SS, Borisov OV. Solution and Melts of Barbwire Bottlebrushes: Hierarchical Structure and Scale-Dependent Elasticity. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02358] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ekaterina B. Zhulina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
| | - Sergei S. Sheiko
- Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Oleg V. Borisov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, UMR 5254 CNRS, UPPA, Pau, France
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7
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Yang M, Zhao W, Singh S, Simmons B, Cheng G. On the solution structure of kraft lignin in ethylene glycol and its implication for nanoparticle preparation. NANOSCALE ADVANCES 2019; 1:299-304. [PMID: 36132484 PMCID: PMC9473202 DOI: 10.1039/c8na00042e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 08/25/2018] [Indexed: 05/22/2023]
Abstract
Ethylene glycol (EG) starts to attract attention as a robust solvent for lignin processing. However its solution structure has not been revealed. In this effort, small angle neutron scattering (SANS) and dynamic light scattering are used to understand the dissolution of kraft lignin in EG and the impact of the resultant solution structure on nanoparticle preparation. Lignin solutions with different concentrations (0.6 to 13.0 wt%) were explored by SANS, allowing evaluation of the solvent quality, the conformation of lignin subunits and their aggregation in EG. Molecular interactions between EG and lignin were discussed and compared to those between DMSO and lignin. The process of nanoparticle preparation from EG solutions upon addition of anti-solvents was also discussed.
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Affiliation(s)
- Mingkun Yang
- State Key Laboratory of Organic-Inorganic Composites, College of Life Science and Technology, Beijing University of Chemical Technology North 3rd Ring East, # 15 Beijing 100029 China
| | - Wenwen Zhao
- State Key Laboratory of Organic-Inorganic Composites, College of Life Science and Technology, Beijing University of Chemical Technology North 3rd Ring East, # 15 Beijing 100029 China
| | - Seema Singh
- Biomass Science and Conversion Technology Department, Sandia National Laboratories 7011 East Avenue Livermore CA 94551 USA
| | - Blake Simmons
- Joint BioEnergy Institute (JBEI) 5885 Hollis Street Emeryville CA 94608 USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory Berkeley 94702 CA USA
| | - Gang Cheng
- State Key Laboratory of Organic-Inorganic Composites, College of Life Science and Technology, Beijing University of Chemical Technology North 3rd Ring East, # 15 Beijing 100029 China
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8
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Lyubimov I, Wessels MG, Jayaraman A. Molecular Dynamics Simulation and PRISM Theory Study of Assembly in Solutions of Amphiphilic Bottlebrush Block Copolymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01535] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ivan Lyubimov
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Michiel G. Wessels
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
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9
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Paturej J, Kreer T. Hierarchical excluded volume screening in solutions of bottlebrush polymers. SOFT MATTER 2017; 13:8534-8541. [PMID: 29095470 DOI: 10.1039/c7sm01968h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Polymer bottlebrushes provide intriguing features being relevant both in nature and in synthetic systems. While their presence in the articular cartilage optimizes synovial joint lubrication, bottlebrushes offer pathways for fascinating applications, such as within super-soft elastomers or for drug delivery. However, the current theoretical understanding lacks completeness, primarily due to the complicated interplay of many length scales. Herein, we develop an analytical model that demonstrates how structural properties of bottlebrushes depend on the concentration, ranging from dilute solutions to highly concentrated melts. The validity of our model is supported by data from extensive molecular dynamics simulations. We demonstrate that the hierarchical structure of bottlebrushes dictates a sequence of conformational changes as the solution concentration increases. The effect is mediated by screening of excluded volume interactions at subsequent structural parts of the bottlebrushes. Our findings provide important insights that should enable improved customization of novel materials based on the architectural design of polymer bottlebrushes.
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Affiliation(s)
- Jarosław Paturej
- Leibniz-Institut für Polymerforschung Dresden e.V., 01069 Dresden, Germany
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10
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Ozer I, Tomak A, Zareie HM, Baran Y, Bulmus V. Effect of Molecular Architecture on Cell Interactions and Stealth Properties of PEG. Biomacromolecules 2017; 18:2699-2710. [DOI: 10.1021/acs.biomac.7b00443] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | - Hadi M. Zareie
- School
of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Sydney NSW 2007, Australia
| | - Yusuf Baran
- Department
of Molecular Biology and Genetics, Abdullah Gul University, Kayseri 38080, Turkey
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11
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Self-assembly of comb-like amphiphilic copolymers in aqueous solution. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-1910-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Khan S, Birch J, Harris P, Van Calsteren MR, Ipsen R, Peters GHJ, Svensson B, Almdal K. Revealing the Compact Structure of Lactic Acid Bacterial Heteroexopolysaccharides by SAXS and DLS. Biomacromolecules 2017; 18:747-756. [DOI: 10.1021/acs.biomac.6b01597] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sanaullah Khan
- Department
of Micro- and Nanotechnology, DTU, Ørsteds Plads, Building 423, DK-2800 Kgs. Lyngby, Denmark
| | - Johnny Birch
- Enzyme
and Protein Chemistry, Department of Systems Biology, DTU, Elektrovej, Building
375, DK-2800 Kgs.
Lyngby, Denmark
| | - Pernille Harris
- Department
of Chemistry, DTU, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Marie-Rose Van Calsteren
- Saint-Hyacinthe
Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Boulevard West, Saint-Hyacinthe,
Quebec J2S 8E3, Canada
| | - Richard Ipsen
- Department
of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg, Denmark
| | - Günther H. J. Peters
- Department
of Chemistry, DTU, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Birte Svensson
- Enzyme
and Protein Chemistry, Department of Systems Biology, DTU, Elektrovej, Building
375, DK-2800 Kgs.
Lyngby, Denmark
| | - Kristoffer Almdal
- Department
of Micro- and Nanotechnology, DTU, Ørsteds Plads, Building 423, DK-2800 Kgs. Lyngby, Denmark
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13
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Zhou Y, Tang H, Wu P. Intra-molecular interactions dominating the dehydration of a poly(2-isopropyl-2-oxazoline)-based densely grafted polymer comb in aqueous solution and hysteretic liquid–liquid phase separation. Phys Chem Chem Phys 2017; 19:6626-6635. [DOI: 10.1039/c6cp08574a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Temperature-induced association and hysteretic LLPS process of a poly(2-isopropyl-2-oxazoline) (PiPOx)-based polymer comb in water.
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Affiliation(s)
- Yuanyuan Zhou
- The State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science and Laboratory for Advanced Materials
- Fudan University
- Shanghai 200433
| | - Hui Tang
- The State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science and Laboratory for Advanced Materials
- Fudan University
- Shanghai 200433
| | - Peiyi Wu
- The State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science and Laboratory for Advanced Materials
- Fudan University
- Shanghai 200433
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14
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Kikuchi M, Takahara A, Kawaguchi S. Dimensional Characterizations from Rod Stars to Brushes of Polymers with a Low Degree of Polymerization. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Moriya Kikuchi
- Institute
for Materials Chemistry and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395 Japan
| | - Atsushi Takahara
- Institute
for Materials Chemistry and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395 Japan
| | - Seigou Kawaguchi
- Department
of Organic Materials Science, Graduate School of Organic Materials
Science, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan
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15
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Pesek SL, Xiang Q, Hammouda B, Verduzco R. Small-angle neutron scattering analysis of bottlebrush backbone and side chain flexibility. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24251] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Stacy L. Pesek
- Department of Chemical and Biomolecular Engineering; Rice University; 6100 Main Street MS-362 Houston Texas 77005
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment; Rice University; 6100 Main Street MS-362 Houston Texas 77005
| | - Qiqi Xiang
- Department of Chemical and Biomolecular Engineering; Rice University; 6100 Main Street MS-362 Houston Texas 77005
| | - Boualem Hammouda
- National Institutes for of Standards and Technology, Center for Neutron Research; 100 Bureau Drive, Stop 6102 Gaithersburg Maryland 20899-6102
| | - Rafael Verduzco
- Department of Chemical and Biomolecular Engineering; Rice University; 6100 Main Street MS-362 Houston Texas 77005
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment; Rice University; 6100 Main Street MS-362 Houston Texas 77005
- Department of Materials Science and NanoEngineering; Rice University; 6100 Main Street MS-325 Houston Texas 77005
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16
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SANS study on self-assembled structures of glucose-responsive phenylboronate ester-containing diblock copolymer. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.08.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Liu M, Leroux JC, Gauthier MA. Conformation–function relationships for the comb-shaped polymer pOEGMA. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2015.03.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Semi-permeable coatings fabricated from comb-polymers efficiently protect proteins in vivo. Nat Commun 2014; 5:5526. [DOI: 10.1038/ncomms6526] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 10/10/2014] [Indexed: 11/08/2022] Open
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19
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Ahn SK, Carrillo JMY, Han Y, Kim TH, Uhrig D, Pickel DL, Hong K, Kilbey SM, Sumpter BG, Smith GS, Do C. Structural Evolution of Polylactide Molecular Bottlebrushes: Kinetics Study by Size Exclusion Chromatography, Small Angle Neutron Scattering, and Simulations. ACS Macro Lett 2014; 3:862-866. [PMID: 35596347 DOI: 10.1021/mz5003454] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Structural evolution from poly(lactide) (PLA) macromonomer to resultant PLA molecular bottlebrush during ring opening metathesis polymerization (ROMP) was investigated for the first time by combining size exclusion chromatography (SEC), small-angle neutron scattering (SANS), and coarse-grained molecular dynamics (CG-MD) simulations. Multiple aliquots were collected at various reaction times during ROMP and subsequently analyzed by SEC and SANS. These complementary techniques enable the understanding of systematic changes in conversion, molecular weight and dispersity as well as structural details of PLA molecular bottlebrushes. CG-MD simulation not only predicts the experimental observations, but it also provides further insight into the analysis and interpretation of data obtained in SEC and SANS experiments. We find that PLA molecular bottlebrushes undergo three conformational transitions with increasing conversion (i.e., increasing the backbone length): (1) from an elongated to a globular shape due to longer side chain at low conversion, (2) from a globular to an elongated shape at intermediate conversion caused by excluded volume of PLA side chain, and (3) the saturation of contour length at high conversion due to chain transfer reactions.
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Affiliation(s)
| | | | | | - Tae-Hwan Kim
- Neutron
Science Division, Department of Reactor Utilization and Development, Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yuseong-gu, Daejeon, Republic of Korea
| | | | | | | | - S. Michael Kilbey
- Departments
of Chemistry and Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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20
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Zhang Z, Carrillo JMY, Ahn SK, Wu B, Hong K, Smith GS, Do C. Atomistic Structure of Bottlebrush Polymers: Simulations and Neutron Scattering Studies. Macromolecules 2014. [DOI: 10.1021/ma500613c] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | | | | | - Bin Wu
- Department
of Physics and Astronomy, Joint Institute for Neutron Science, University of Tennessee, Knoxville, Tennessee 37996, United States
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21
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Stukel J, Thompson S, Simon L, Willits R. Polyethlyene glycol microgels to deliver bioactive nerve growth factor. J Biomed Mater Res A 2014; 103:604-13. [DOI: 10.1002/jbm.a.35209] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/31/2014] [Accepted: 04/22/2014] [Indexed: 02/05/2023]
Affiliation(s)
- Jessica Stukel
- Department of Biomedical Engineering; The University of Akron; Akron Ohio 44325-0302
| | - Susan Thompson
- Department of Biomedical Engineering; The University of Akron; Akron Ohio 44325-0302
| | - Laurent Simon
- Department of Chemical; Biological; and Pharmaceutical Engineering; New Jersey Institute of Technology; Newark New Jersey 07102
| | - Rebecca Willits
- Department of Biomedical Engineering; The University of Akron; Akron Ohio 44325-0302
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22
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Xu W, Choi I, Plamper FA, Synatschke CV, Müller AHE, Melnichenko YB, Tsukruk VV. Thermo-Induced Limited Aggregation of Responsive Star Polyelectrolytes. Macromolecules 2014. [DOI: 10.1021/ma500153w] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Weinan Xu
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Ikjun Choi
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Felix A. Plamper
- Institute
of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Christopher V. Synatschke
- Makromolekulare
Chemie II and Bayreuther Zentrum für Kolloide und Grenzflächen, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - Axel H. E. Müller
- Makromolekulare
Chemie II and Bayreuther Zentrum für Kolloide und Grenzflächen, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - Yuri B. Melnichenko
- Biology
and Soft Matter Science Division, Neutron Scattering Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States
| | - Vladimir V. Tsukruk
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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23
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Tian HJ, Qu W, Zhu YF, Shen Z, Fan XH. Synthesis and properties of a rod-g-rod bottlebrush with a semirigid mesogen-jacketed polymer as the side chain. Polym Chem 2014. [DOI: 10.1039/c4py00033a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A series of bottlebrushes, PPLG-g-PMPCS, with an α-helical rigid backbone and mesogen-jacketed rigid side chains were synthesized by the “grafting onto” method. The conformation of the bottlebrush changes from a cylinder to an ellipsoid with increasing side-chain length.
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Affiliation(s)
- Hai-Jian Tian
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871, China
| | - Wei Qu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871, China
| | - Yu-Feng Zhu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871, China
| | - Zhihao Shen
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871, China
| | - Xing-He Fan
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871, China
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24
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Hsu HP, Paul W, Binder K. Estimation of persistence lengths of semiflexible polymers: Insight from simulations. POLYMER SCIENCE SERIES C 2013. [DOI: 10.1134/s1811238213060027] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Gillissen MAJ, Terashima T, Meijer EW, Palmans ARA, Voets IK. Sticky Supramolecular Grafts Stretch Single Polymer Chains. Macromolecules 2013. [DOI: 10.1021/ma4006846] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Martijn A. J. Gillissen
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and Organic
Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Takaya Terashima
- Department of Polymer Chemistry, Graduate
School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - E. W. Meijer
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and Organic
Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Anja R. A. Palmans
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and Organic
Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Ilja K. Voets
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and Organic
Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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26
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Teixeira F, Popa AM, Guimond S, Hegemann D, Rossi RM. Synthesis of poly(oligo(ethylene glycol)methacrylate)-functionalized membranes for thermally controlled drug delivery. J Appl Polym Sci 2012. [DOI: 10.1002/app.38730] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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27
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Borisov OV, Zhulina EB, Birshtein TM. Persistence Length of Dendritic Molecular Brushes. ACS Macro Lett 2012; 1:1166-1169. [PMID: 35607188 DOI: 10.1021/mz3003903] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
On the basis of mean-field theory, we predict that molecular brushes with dendritic side chains ("dendronized polymers") may exhibit the behavior of semirigid polymers capable of lyotropic odering. The apparent persistence length of these molecular brushes is governed by the interactions between dendritic grafts and may significantly exceed the characteristic brush thickness. Compared to bottle-brushes with linear grafts, manifestation of the induced rigidity in molecular brushes with dendritic branches is expected at smaller degrees of polymerization of the grafts. Under good solvent conditions, the induced rigidity depends solely on the number of side chain monomers per unit length of backbone and the second virial coeffcient of monomer-monomer interactions, irrespective of graft topology.
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Affiliation(s)
- O. V. Borisov
- IPREM UMR 5254 CNRS UPPA, 64053 Pau, France
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia
| | - E. B. Zhulina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia
| | - T. M. Birshtein
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint-Petersburg, Russia
- Department of Physics, Saint-Petersburg State University, 198504 Petrodvorets, Saint-Petersburg, Russia
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28
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Weber C, Rogers S, Vollrath A, Hoeppener S, Rudolph T, Fritz N, Hoogenboom R, Schubert US. Aqueous solution behavior of comb-shaped poly(2-ethyl-2-oxazoline). ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26332] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Cheng G, Kent MS, He L, Varanasi P, Dibble D, Arora R, Deng K, Hong K, Melnichenko YB, Simmons BA, Singh S. Effect of ionic liquid treatment on the structures of lignins in solutions: molecular subunits released from lignin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:11850-11857. [PMID: 22738225 DOI: 10.1021/la300938b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The solution structures of three types of isolated lignin--organosolv (OS), Kraft (K), and low sulfonate (LS)--before and after treatment with 1-ethyl-3-methylimidazolium acetate were studied using small-angle neutron scattering (SANS) and dynamic light scattering (DLS) over a concentration range of 0.3-2.4 wt %. The results indicate that each of these lignins is comprised of aggregates of well-defined basal subunits, the shapes and sizes of which, in D(2)O and DMSO-d(6), are revealed using these techniques. LS lignin contains a substantial amount of nanometer-scale individual subunits. In aqueous solution these subunits have a well-defined elongated shape described well by ellipsoidal and cylindrical models. At low concentration the subunits are highly expanded in alkaline solution, and the effect is screened with increasing concentration. OS lignin dissolved in DMSO was found to consist of a narrow distribution of aggregates with average radius 200 ± 30 nm. K lignin in DMSO consists of aggregates with a very broad size distribution. After ionic liquid (IL) treatment, LS lignin subunits in alkaline solution maintained the elongated shape but were reduced in size. IL treatment of OS and K lignins led to the release of nanometer-scale subunits with well-defined size and shape.
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Affiliation(s)
- Gang Cheng
- Deconstruction Division, Joint BioEnergy Institute, Emeryville, California 94608, USA
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30
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Pavlov GM, Breul AM, Hager MD, Schubert US. Hydrodynamic and Molecular Study of Poly{4-[4-(hexyloxy)phenyl]ethynylphenyl methacrylate} in Dilute Solutions and Conformational Peculiarities of Brush-Like Macromolecules. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201100653] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Theodorakis PE, Hsu HP, Paul W, Binder K. Computer simulation of bottle-brush polymers with flexible backbone: Good solvent versus theta solvent conditions. J Chem Phys 2011; 135:164903. [DOI: 10.1063/1.3656072] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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32
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Tsvetkov NV, Andreeva LN, Bushin SV, Strelina IA, Bezrukova MA, Girbasova NV, Bilibin AY. Structure and properties of macromolecules with side dendrons based on L-aspartic acid. POLYMER SCIENCE SERIES C 2010. [DOI: 10.1134/s1811238210010029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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33
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Tsvetkov NV, Andreeva LN, Bushin SV, Alyab’eva VP, Strelina IA, Ivanova VO, Lebedeva EV, Matveeva NG, Girbasova NV, Bilibin AY. Synthesis and molecular properties of polymers with asymmetrically substituted side dendrons based on L-aspartic acid. POLYMER SCIENCE SERIES A 2010. [DOI: 10.1134/s0965545x10070023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Gromadzki D, Jigounov A, Štĕpánek P, Makuška R. Synthesis of thermally responsive cylindrical molecular brushes via a combination of nitroxide-mediated radical polymerization and “grafting onto” strategy. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2009.12.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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