1
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Pastorczak M, Duk K, Shahab S, Kananenka AA. Combinational Vibration Modes in H 2O/HDO/D 2O Mixtures Detected Thanks to the Superior Sensitivity of Femtosecond Stimulated Raman Scattering. J Phys Chem B 2023. [PMID: 37201478 DOI: 10.1021/acs.jpcb.3c01334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Overtones and combinational modes frequently play essential roles in ultrafast vibrational energy relaxation in liquid water. However, these modes are very weak and often overlap with fundamental modes, particularly in isotopologues mixtures. We measured VV and HV Raman spectra of H2O and D2O mixtures with femtosecond stimulated Raman scattering (FSRS) and compared the results with calculated spectra. Specifically, we observed the mode at around 1850 cm-1 and assigned it to H-O-D bend + rocking libration. Second, we found that the H-O-D bend overtone band and the OD stretch + rocking libration combination band contribute to the band located between 2850 and 3050 cm-1. Furthermore, we assigned the broad band located between 4000 and 4200 cm-1 to be composed of combinational modes of high-frequency OH stretching modes with predominantly twisting and rocking librations. These results should help in a proper interpretation of Raman spectra of aqueous systems as well as in the identification of vibrational relaxation pathways in isotopically diluted water.
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Affiliation(s)
- Marcin Pastorczak
- Institute of Physical Chemistry, Polish Academy of Sciences, Laser Centre, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Katsiaryna Duk
- Institute of Physical Chemistry, Polish Academy of Sciences, Laser Centre, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Samaneh Shahab
- Institute of Physical Chemistry, Polish Academy of Sciences, Laser Centre, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Alexei A Kananenka
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, United States
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2
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Geminiani L, Campione FP, Canevali C, Corti C, Giussani B, Gorla G, Luraschi M, Recchia S, Rampazzi L. Historical Silk: A Novel Method to Evaluate Degumming with Non-Invasive Infrared Spectroscopy and Spectral Deconvolution. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16051819. [PMID: 36902936 PMCID: PMC10003773 DOI: 10.3390/ma16051819] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/02/2023] [Accepted: 02/20/2023] [Indexed: 05/31/2023]
Abstract
To correctly manage a collection of historical silks, it is important to detect if the yarn has been originally subjected to degumming. This process is generally applied to eliminate sericin; the obtained fiber is named soft silk, in contrast with hard silk which is unprocessed. The distinction between hard and soft silk gives both historical information and useful indications for informed conservation. With this aim, 32 samples of silk textiles from traditional Japanese samurai armors (15th-20th century) were characterized in a non-invasive way. ATR-FTIR spectroscopy has been previously used to detect hard silk, but data interpretation is challenging. To overcome this difficulty, an innovative analytical protocol based on external reflection FTIR (ER-FTIR) spectroscopy was employed, coupled with spectral deconvolution and multivariate data analysis. The ER-FTIR technique is rapid, portable, and widely employed in the cultural heritage field, but rarely applied to the study of textiles. The ER-FTIR band assignment for silk was discussed for the first time. Then, the evaluation of the OH stretching signals allowed for a reliable distinction between hard and soft silk. Such an innovative point of view, which exploits a "weakness" of FTIR spectroscopy-the strong absorption from water molecules-to indirectly obtain the results, can have industrial applications too.
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Affiliation(s)
- Ludovico Geminiani
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
- Centro Speciale di Scienze e Simbolica dei Beni Culturali, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
| | - Francesco Paolo Campione
- Centro Speciale di Scienze e Simbolica dei Beni Culturali, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
- Dipartimento di Scienze Umane e dell’Innovazione per il Territorio, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
- Museo delle Culture, Villa Malpensata, Riva Antonio Caccia 5, 6900 Lugano, Switzerland
| | - Carmen Canevali
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via Roberto Cozzi 55, 20125 Milan, Italy
- Istituto per le Scienze del Patrimonio Culturale, Consiglio Nazionale delle Ricerche (ISPC-CNR), Via Cozzi 53, 20125 Milano, Italy
| | - Cristina Corti
- Centro Speciale di Scienze e Simbolica dei Beni Culturali, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
- Dipartimento di Scienze Umane e dell’Innovazione per il Territorio, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
| | - Barbara Giussani
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
| | - Giulia Gorla
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
| | - Moira Luraschi
- Centro Speciale di Scienze e Simbolica dei Beni Culturali, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
- Museo delle Culture, Villa Malpensata, Riva Antonio Caccia 5, 6900 Lugano, Switzerland
| | - Sandro Recchia
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
| | - Laura Rampazzi
- Centro Speciale di Scienze e Simbolica dei Beni Culturali, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
- Dipartimento di Scienze Umane e dell’Innovazione per il Territorio, Università degli Studi dell’Insubria, Via Sant’Abbondio 12, 22100 Como, Italy
- Istituto per le Scienze del Patrimonio Culturale, Consiglio Nazionale delle Ricerche (ISPC-CNR), Via Cozzi 53, 20125 Milano, Italy
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3
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Raghuram E, Padmarajan R, Kalpathy SK. Hydrogen bond induced solvent ordering in aqueous poly (sodium p-styrenesulfonate). POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Water structure in glycerol: Spectroscopic and computer simulation investigation of hydrogen bonding and water clustering. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118916] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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GEMMEI-IDE M, KAGAYA S. Mid-infrared Spectroscopic Analysis of Water Structure in Solid Polymers. BUNSEKI KAGAKU 2022. [DOI: 10.2116/bunsekikagaku.71.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Yasoshima N, Ishiyama T, Gemmei-Ide M, Matubayasi N. Molecular Structure and Vibrational Spectra of Water Molecules Sorbed in Poly(2-methoxyethylacrylate) Revealed by Molecular Dynamics Simulation. J Phys Chem B 2021; 125:12095-12103. [PMID: 34677976 DOI: 10.1021/acs.jpcb.1c07342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Molecular dynamics (MD) simulations of water sorption in poly(2-methoxyethylacrylate) (PMEA) are carried out to elucidate the hydrogen bonding (H-bonding) structures of the water molecules and the side chains of PMEA. A PMEA model incorporating lone-pair virtual sites on the carbonyl and methoxy oxygens of the side chain of PMEA, which are the key interaction sites in a biocompatible polymer, is newly developed. The PMEA model well reproduces the experimentally observed features in the infrared spectra of the hydrated polymer, as well as the radial distribution function of the water molecules in contact with the polymer, as calculated by ab initio MD simulations. The MD simulation results reveal that water molecules tend to form H-bonds with the carbonyl oxygen and the methoxy oxygen of the side chain of PMEA simultaneously, which enhance the "head-to-tail" stacking structure of the side chains at a low concentration range of water. Further penetration of water into the PMEA structure gradually increases the water-water H-bonding state and promotes the formation of water clusters even below the equilibrium water content.
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Affiliation(s)
- Nobuhiro Yasoshima
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Tatsuya Ishiyama
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Makoto Gemmei-Ide
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Nobuyuki Matubayasi
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
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7
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Czaderna-Lekka A, Kozanecki M, Matusiak M, Kadlubowski S. Phase transitions of poly(oligo(ethylene glycol) methyl ether methacrylate)-water systems. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Das Mahanta D, Rana D, Patra A, Mukherjee B, Mitra RK. Heterogeneous structure and solvation dynamics of DME/water binary mixtures: A combined spectroscopic and simulation investigation. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Shinzawa H, Turner B, Mizukado J, Kazarian SG. Protein hydration in living cells probed by Fourier transform infrared (FT-IR) spectroscopic imaging. Analyst 2017; 142:2475-2483. [DOI: 10.1039/c7an00337d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
FT-IR spectra of a HEK cell were analyzed with 2D disrelation mapping to reveal molecular states of water and protein hydration.
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Affiliation(s)
- H. Shinzawa
- Department of Chemical Engineering
- Imperial College London
- UK
- National Institute of Advanced Industrial Science and Technology (AIST)
- Japan
| | - B. Turner
- Department of Chemical Engineering
- Imperial College London
- UK
| | - J. Mizukado
- National Institute of Advanced Industrial Science and Technology (AIST)
- Japan
| | - S. G. Kazarian
- Department of Chemical Engineering
- Imperial College London
- UK
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10
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Kim HC, Choi YH, Bu W, Meron M, Lin B, Won YY. Increased humidity can soften glassy Langmuir polymer films by two mechanisms: plasticization of the polymer material, and suppression of the evaporation cooling effect. Phys Chem Chem Phys 2017; 19:10663-10675. [PMID: 28398439 DOI: 10.1039/c7cp00785j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Increasing the relative humidity decreases the surface pressure of a glassy Langmuir polymer film.
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Affiliation(s)
- Hyun Chang Kim
- School of Chemical Engineering
- Purdue University
- West Lafayette
- USA
| | - Yun Hwa Choi
- School of Chemical Engineering
- Purdue University
- West Lafayette
- USA
| | - Wei Bu
- Advanced Photon Source
- University of Chicago
- Chicago
- USA
| | - Mati Meron
- Advanced Photon Source
- University of Chicago
- Chicago
- USA
| | - Binhua Lin
- Advanced Photon Source
- University of Chicago
- Chicago
- USA
| | - You-Yeon Won
- School of Chemical Engineering
- Purdue University
- West Lafayette
- USA
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11
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Abstract
In this mini-review, we discuss multi-stimuli-responsive polymers, which exhibit upper critical solution temperature (UCST) behavior mainly in aqueous solutions, and focus on examples where counter ions, electricity, light, or pH influence the thermoresponsiveness of these polymers.
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Affiliation(s)
- Jukka Niskanen
- Laboratory of Polymer Chemistry
- Department of Chemistry
- University of Helsinki
- 00014 Helsinki
- Finland
| | - Heikki Tenhu
- Laboratory of Polymer Chemistry
- Department of Chemistry
- University of Helsinki
- 00014 Helsinki
- Finland
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12
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Murakami D, Kobayashi M, Higaki Y, Jinnai H, Takahara A. Swollen structure and electrostatic interactions of polyelectrolyte brush in aqueous solution. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.04.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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13
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Grossutti M, Dutcher JR. Correlation Between Chain Architecture and Hydration Water Structure in Polysaccharides. Biomacromolecules 2016; 17:1198-204. [DOI: 10.1021/acs.biomac.6b00026] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Grossutti
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - John R. Dutcher
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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14
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Gemmei-Ide M, Miyashita T, Kagaya S, Kitano H. Mid-infrared spectroscopic investigation of the perfect vitrification of poly(ethylene glycol) aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10881-10887. [PMID: 26365423 DOI: 10.1021/acs.langmuir.5b02829] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Crystallization/recrystallization behaviors of poly(ethylene glycol) (PEG) aqueous solutions with water contents (WC's) of ∼36-51 wt % were investigated by temperature-variable mid-infrared spectroscopy. At a WC of 43.2 wt %, crystallization and recrystallization of water and PEG were not observed. At this specific WC value (WCPV), perfect vitrification occurred. Below and above the WCPV value, crystallization/recrystallization behaviors changed drastically. The crystallization temperature below WCPV (237 K) was ∼10 K greater than that above WCPV (226 K). Recrystallization above and below WCPV occurred in one (213 K) and two (198 and 210 K) steps, respectively. These findings resulted from the difference in the (re)crystallization behaviors of water molecules associated with PEG chains with helical and random-coil conformations. These two types of water molecules might have limiting concentrations for their (re)crystallization, indicating that perfect vitrification might have occurred when the concentrations of the two types of water molecules were less than the limiting concentrations of their (re)crystallization.
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Affiliation(s)
- Makoto Gemmei-Ide
- Department of Environmental Applied Chemistry, Graduate School of Science and Engineering, University of Toyama , 3190 Gofuku, Toyama 930-8555, Japan
| | - Takashi Miyashita
- Department of Environmental Applied Chemistry, Graduate School of Science and Engineering, University of Toyama , 3190 Gofuku, Toyama 930-8555, Japan
| | - Shigehiro Kagaya
- Department of Environmental Applied Chemistry, Graduate School of Science and Engineering, University of Toyama , 3190 Gofuku, Toyama 930-8555, Japan
| | - Hiromi Kitano
- Department of Environmental Applied Chemistry, Graduate School of Science and Engineering, University of Toyama , 3190 Gofuku, Toyama 930-8555, Japan
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15
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Gonzalez VC, Beheregaray ACM, Peres BM, Sallis ESV, Varela Junior AS, Trindade GS. Histopathological Analysis of UVB and IR Interaction in Rat Skin. Photochem Photobiol 2015; 91:895-900. [PMID: 25682891 DOI: 10.1111/php.12435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 01/30/2015] [Indexed: 11/27/2022]
Abstract
To determine the chronic skin effects caused by the interaction of infrared and ultraviolet B radiations, male Rattus norvegicus (Wistar) (2 months old) were exposed for 15 days to infrared radiation (600-1500 nm, with a peak at 1000 nm, n = 12) for 30 min (1080 J cm(-2) ) (IRo); to ultraviolet B radiation (peak emission at 313 nm, n = 9) for 90 min (55.08 J cm(-2) ) (UVB); to infrared radiation followed after 90 min by ultraviolet B (n = 6) (IRUVB) and to ultraviolet B followed after 90 min by infrared radiation (n = 9) (UVBIR). Skin samples were collected and histopathological analysis showed the presence of acanthosis, parakeratotic and orthokeratotic hyperkeratosis, intraepidermal pustules, keratin pearls, detachment of epidermis, collagen necrosis, inflammatory infiltrate, vasodilation, basal cell vacuolization and superficial dermis degeneration both in UVB and UVBIR treatments. IRUVB animals showed the same characteristics as above except for parakeratotic hyperkeratosis, keratin pearls and superficial dermis degeneration. To conclude, infrared radiation exposure after ultraviolet B irradiation increases skin damage without protecting the tissue, while infrared radiation exposure before ultraviolet B irradiation showed a protective effect against ultraviolet skin damage.
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Affiliation(s)
- Vinícius C Gonzalez
- Programa de Pós-Graduação em Ciências Fisiológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil
| | - Ana C M Beheregaray
- Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil
| | - Bárbara M Peres
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil
| | - Eliza S V Sallis
- Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, Brazil
| | | | - Gilma S Trindade
- Programa de Pós-Graduação em Ciências Fisiológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil
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16
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Wada R, Fujimoto K, Kato M. Why Is Poly(oxyethylene) Soluble in Water? Evidence from the Thermodynamic Profile of the Conformational Equilibria of 1,2-Dimethoxyethane and Dimethoxymethane Revealed by Raman Spectroscopy. J Phys Chem B 2014; 118:12223-31. [DOI: 10.1021/jp5048997] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryoichi Wada
- Graduate School of Science and Engineering, ‡Department of Pharmacy,
College of
Pharmaceutical Sciences, and §Graduate School of Life Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
| | - Kazushi Fujimoto
- Graduate School of Science and Engineering, ‡Department of Pharmacy,
College of
Pharmaceutical Sciences, and §Graduate School of Life Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
| | - Minoru Kato
- Graduate School of Science and Engineering, ‡Department of Pharmacy,
College of
Pharmaceutical Sciences, and §Graduate School of Life Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
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17
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Abstract
The objective of this study was to assess the physicochemical effects of hydrating a hydrophobic end-capped poly(lactide-co-glycolide) (PLGA) polymer in the liquid and vapor state. PLGA RG503 polymer was incubated at 37°C in 0.5% polyvinyl alcohol (PVA) solution and at 90% RH. Samples were withdrawn at predetermined intervals and changes to polymer properties like glass transition temperature (Tg), moisture uptake, molecular weight change, and % acid number were determined using differential scanning calorimetry, Karl Fisher titrimetry, gel permeation chromatography, and acid base titrimetry, respectively. Study results showed that Tg was depressed instantaneously upon hydration, indicating that bulk water acted as a plasticizer of hydrophobic end-capped PLGA. Tg values decreased to levels below the incubation temperature when hydrated in 0.5% PVA solution but not in 90% RH. The drop in Tg exhibited a linear relationship (R2>0.99) to the amount of water uptake by the polymer; higher moisture uptake was noted with liquid water. Removal of moisture from the polymer matrix resulted in recovery of Tg, only up to a period of 14 days. Presence of water in liquid or vapor form caused a reduction in molecular weight of the polymer and a corresponding increase in % acid number over the duration of the study.
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18
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Venegas-Sanchez JA, Tagaya M, Kobayashi T. Effect of ultrasound on the aqueous viscosity of several water-soluble polymers. Polym J 2013. [DOI: 10.1038/pj.2013.47] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Murakami D, Kobayashi M, Moriwaki T, Ikemoto Y, Jinnai H, Takahara A. Spreading and structuring of water on superhydrophilic polyelectrolyte brush surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1148-1151. [PMID: 23281847 DOI: 10.1021/la304697q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The wetting behavior of superhydrophilic polyelectrolyte brushes was investigated. Reflection interference contrast microscopy demonstrated that the contact angles of water on the polyelectrolyte brushes were extremely low but remained finite in the range of <3°. The presence of water molecules was evident, even outside the macroscopic water droplet. These water molecules were confined to the thin brush layers and contained a highly ordered hydrogen bond network, which was identified as structural water. The presence of the thin film and the structural water changed the surface energies, which prevented the complete wetting of the surface.
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Affiliation(s)
- Daiki Murakami
- Japan Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, CE80, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
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20
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Kitano H, Gemmei-Ide M. Structure of Water in the Vicinity of Amphoteric Polymers as Revealed by Vibrational Spectroscopy. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 21:1877-93. [DOI: 10.1163/092050610x488278] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Hiromi Kitano
- a Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Makoto Gemmei-Ide
- b Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
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21
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Fenn EE, Moilanen DE, Levinger NE, Fayer MD. Water dynamics and interactions in water-polyether binary mixtures. J Am Chem Soc 2009; 131:5530-9. [PMID: 19323522 PMCID: PMC2889155 DOI: 10.1021/ja809261d] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Poly(ethylene) oxide (PEO) is a technologically important polymer with a wide range of applications including ion-exchange membranes, protein crystallization, and medical devices. PEO's versatility arises from its special interactions with water. Water molecules may form hydrogen-bond bridges between the ether oxygens of the backbone. While steady-state measurements and theoretical studies of PEO's interactions with water abound, experiments measuring dynamic observables are quite sparse. A major question is the nature of the interactions of water with the ether oxygens as opposed to the highly hydrophilic PEO terminal hydroxyls. Here, we examine a wide range of mixtures of water and tetraethylene glycol dimethyl ether (TEGDE), a methyl-terminated derivative of PEO with 4 repeat units (5 ether oxygens), using ultrafast infrared polarization selective pump-probe measurements on water's hydroxyl stretching mode to determine vibrational relaxation and orientational relaxation dynamics. The experiments focus on the dynamical interactions of water with the ether backbone because TEGDE does not have the PEO terminal hydroxyls. The experiments observe two distinct subensembles of water molecules: those that are hydrogen bonded to other waters and those that are associated with TEGDE molecules. The water orientational relaxation has a fast component of a few picoseconds (water-like) followed by much slower decay of approximately 20 ps (TEGDE associated). The two decay times vary only mildly with the water concentration. The two subensembles are evident even in very low water content samples, indicating pooling of water molecules. Structural change as water content is lowered through either conformational changes in the backbone or increasing hydrophobic interactions is discussed.
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Affiliation(s)
- Emily E. Fenn
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | | | | | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, CA 94305
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22
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Kitano H, Nagaoka K, Tada S, Gemmei-Ide M, Tanaka M. Structure of Water Incorporated in Amphoteric Polymer Thin Films as Revealed by FT-IR Spectroscopy. Macromol Biosci 2008; 8:77-85. [PMID: 17876858 DOI: 10.1002/mabi.200700082] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The structure and hydrogen bonding of water incorporated in a thin film of amphoteric terpolymers composed of various ratios of MA, DMAPMA, and BMA were analyzed using the band shapes of the O--H stretching in the IR spectra. At an early stage of sorption of water, the IR spectrum for the water incorporated in the film with comparative contents of MA and DMAPMA residues was similar to that for free water. This is consistent with the tendency for zwitterionic polymers, but is in contrast with the drastic change in the IR spectrum of water incorporated in non-ionic polymer films such as polyBMA. These results suggest a correlation between the mildness of the charge-balanced polymers to the structure of incorporated water and their blood compatibilities.
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Affiliation(s)
- Hiromi Kitano
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama, Japan.
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23
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Kitano H, Nagaoka K, Tada S, Gemmei-Ide M. Structure of water in the vicinity of amphoteric polymers as revealed by Raman spectroscopy. J Colloid Interface Sci 2007; 313:461-8. [PMID: 17543983 DOI: 10.1016/j.jcis.2007.05.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2007] [Revised: 05/02/2007] [Accepted: 05/02/2007] [Indexed: 11/24/2022]
Abstract
The structure and hydrogen bonding of water in an aqueous solution of amphoteric copolymers (poly(MA-r-DMAPMA), 3x10(3)<M(w)<10(4)) composed of various ratios of methacrylic acid (MA) and N-[3-(dimethylamino)propyl]methacrylamide (DMAPMA) were analyzed using the band shapes of the OH stretching in the polarized Raman spectra. The number of hydrogen bonds disrupted due to the presence of one monomer residue (N(corr) value) evaluated for poly(methacrylic acid) was largely positive, and with an increase in the content of the DMAPMA residue, the N(corr) value became smaller, and after passing a minimum (which was still slightly positive) at a roughly equivalent molar ratio (P(M(47)D(53)); M, methacrylic acid; D, N-[3-(dimethylamino)propyl]methacrylamide), increased again. This is in a significant contrast with the largely positive N(corr) values for the homopolymers of MA and DMAPMA, and other ordinary polyelectrolytes. The small N(corr) value for P(M(47)D(53)) was comparable to those for water-soluble nonionic polymers such as poly(ethylene glycol) and zwitterionic polymers such as polycarboxybetaine. These results suggested that the balance of electric charges in polymeric materials is important to be inert to the structure of vicinal water.
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Affiliation(s)
- Hiromi Kitano
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan.
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Döppers LM, Sammon C, Breen C, Yarwood J. FTIR–ATR studies of the sorption and diffusion of acetone/water mixtures in poly(vinyl alcohol). POLYMER 2006. [DOI: 10.1016/j.polymer.2006.01.093] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kitano H, Takaha K, Gemmei-Ide M. Raman spectroscopic study of the structure of water in aqueous solutions of amphoteric polymers. Phys Chem Chem Phys 2006; 8:1178-85. [PMID: 16633598 DOI: 10.1039/b513601f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Methacrylic acid (MA) and [3-(methacryloylamino)propyl]trimethylammonium chloride (MAPTAC) were polymerized to give amphoteric copolymers with various compositions. The structure and H-bonding of water in an aqueous solution of the copolymer were analyzed using the contours of the O-H stretching in the polarized Raman spectra. For comparison, the H-bonded network structure of aqueous solutions of homopolymers (polyMA and polyMAPTAC) was also examined. From the relative intensity of the collective band (C value) corresponding to a long range coupling of the O-H stretching in the aqueous polymer solutions, the number of H-bonds disrupted due to the presence of one monomer residue of the polymers (Ncorr) was determined. The Ncorr value for polyMA was largely positive, and with an increase in the content of the MAPTAC residue, the Ncorr value became smaller, and after passing a minimum (which was still slightly positive) at a roughly equivalent molar ratio, the Ncorr value increased again. This is in significant contrast with the larger positive Ncorr values for the homopolymers (both polyMA and polyMAPTAC), and other ordinary polyelectrolytes such as sodium polyethylenesulfonate, poly-L-lysine hydrobromide and sodium polyacrylate. Furthermore, the Ncorr value for the copolymer (MA ratio MAPTAC = 56:44) became much smaller by the neutralization of MA residues in the copolymer with sodium hydroxide, and comparable to those for neutral polymers such as poly(ethylene glycol) and poly(N-vinylpyrrolidone) and zwitterionic polymers such as poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) and poly[3-sulfo-N,N-dimethyl-N-(3'-methacryloylaminopropyl)propanaminium inner salt]. The present results clearly indicate that the amphoteric polymers with comparative contents of cationic and anionic groups do not significantly disturb the H-bonded network structure of water, probably due to the counteraction of the electrostatic hydration effect by the proximity between the anionic and cationic side groups.
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Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama, 930-8555, Japan.
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Shiurba R, Hirabayashi T, Masuda M, Kawamura A, Komoike Y, Klitz W, Kinowaki K, Funatsu T, Kondo S, Kiyokawa S, Sugai T, Kawamura K, Namiki H, Higashinakagawa T. Cellular responses of the ciliate, Tetrahymena thermophila, to far infrared irradiation. Photochem Photobiol Sci 2006; 5:799-807. [PMID: 17047831 DOI: 10.1039/b601741j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Infrared rays from sunlight permeate the earth's atmosphere, yet little is known about their interactions with living organisms. To learn whether they affect cell structure and function, we tested the ciliated protozoan, Tetrahymena thermophila. These unicellular eukaryotes aggregate in swarms near the surface of freshwater habitats, where direct and diffuse solar radiation impinge upon the water-air interface. We report that populations irradiated in laboratory cultures grew and mated normally, but major changes occurred in cell physiology during the stationary phase. Early on, there were significant reductions in chromatin body size and the antibody reactivity of methyl groups on lysine residues 4 and 9 in histone H3. Later, when cells began to starve, messenger RNAs for key proteins related to chromatin structure, intermediary metabolism and cellular motility increased from two- to nearly nine-fold. Metabolic activity, swimming speed and linearity of motion also increased, and spindle shaped cells with a caudal cilium appeared. Our findings suggest that infrared radiation enhances differentiation towards a dispersal cell-like phenotype in saturated populations of Tetrahymena thermophila.
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Affiliation(s)
- Robert Shiurba
- Integrative Bioscience and Biomedical Engineering, Graduate School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
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Kitano H, Tada S, Mori T, Takaha K, Gemmei-Ide M, Tanaka M, Fukuda M, Yokoyama Y. Correlation between the structure of water in the vicinity of carboxybetaine polymers and their blood-compatibility. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:11932-40. [PMID: 16316135 DOI: 10.1021/la0515571] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The structure and hydrogen bonding of water in the vicinity of carboxybetaine homopolymer (poly[1-carboxy-N,N-dimethyl-N-(2'-methacryloyloxyethyl)methanaminium inner salt] (PolyCMB), and a random copolymer of CMB and n-butyl methacrylate, Poly(CMB-r-BMA), with various molecular weights were analyzed in their aqueous solutions and thin film with contours of O-H stretching of Raman and attenuated total reflection infrared (ATR-IR) spectra, respectively. The relative intensity of the collective band (C value) corresponding to a long-range coupling of O-H stretchings of the Raman spectra for aqueous solution of Poly(CMB-r-BMA) was very close to that for pure water, which is in contrast with the smaller C value in aqueous solution of ordinary polyelectrolytes. The number of hydrogen bonds collapsed by the presence of one monomer residue (N(corr) value) of PolyCMB and Poly(CMB-r-BMA) (CMB, 45 mol %) (M(w), 1.14 x 10(4) and 1.78 x 10(4), respectively) could be calculated from the C value. The N(corr) values were much smaller than those for ordinary polyelectrolytes and close to those for nonionic water-soluble polymers such as poly(ethylene glycol) and poly(N-vinylpyrrolidone). Furthermore, a water-insoluble Poly(CMB-r-BMA) with a large BMA content (M(w) = 347 kD, CMB 27 mol %) could be cast as a thin film (thickness, ca. 10 microm) on a ZnSe crystal for the ATR-IR analyses. At an early stage of sorption of water into the Poly(CMB-r-BMA) film, the O-H stretching band of IR spectra for the water incorporated in the film was similar to that for free water, which is in contrast with the drastic change in the O-H stretching band of water incorporated in polymer films such as poly(methyl methacrylate) (PMMA) and poly(n-butyl methacrylate) (PBMA). The theoretical vibrational frequency for water molecules hydrating a betaine molecule calculated by using a density functional method supported the experimental results. The adhesion of human platelets to Poly(CMB-r-BMA) films was much less than that to PMMA and PBMA. With an increase in the content of CMB residue, the number of platelets adhered to the Poly(CMB-r-BMA) film drastically decreased and then gradually increased, probably due to the increase in the roughness of the film surface. These results suggest that the carboxybetaine monomer residues with a zwitterionic structure do not significantly disturb the hydrogen bonding between water molecules in both aqueous solution and thin film systems, resulting in the excellent blood-compatibility of the carboxybetaine polymers.
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Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Japan.
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Kitano H, Mori T, Takeuchi Y, Tada S, Gemmei-Ide M, Yokoyama Y, Tanaka M. Structure of water incorporated in sulfobetaine polymer films as studied by ATR-FTIR. Macromol Biosci 2005; 5:314-21. [PMID: 15818584 DOI: 10.1002/mabi.200400212] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The structure and hydrogen bonding of water in the vicinity of a thin film of a sulfobetaine copolymer (poly[(N,N-dimethyl-N-(3-sulfopropyl)-3'-methacrylamidopropanaminium inner salt)-ran-(butyl methacrylate)], poly(SPB-r-BMA)), were analyzed with band shapes of O-H stretching of attenuated total reflection infrared (ATR-IR) spectra. The copolymer could be cast as a thin film, of approximate thickness 10 microm, on a ZnSe crystal for the ATR-IR spectroscopy. At an early stage of sorption of water into the polymer film, the O-H stretching band of the IR spectra for the water incorporated in the film was similar to that for free water. This is consistent with the tendency for another zwitterionic polymeric material, poly[(2-methacryloyloxyethylphosphorylcholine)-ran-(butyl methacrylate)] (poly(MPC-r-BMA). It is, however, contradictory to the drastic change in the O-H stretching band for water incorporated into films of polymers such as poly(2-hydroxyethyl methacrylate), poly(methyl methacrylate) and poly(butyl methacrylate). These results suggest that polymers with a zwitterionic structure do not significantly disturb the hydrogen bonding between water molecules incorporated in the thin films. The investigation into the blood-compatibility of both the poly(SPB-r-BMA) and the poly(MPC-r-BMA) films indicate a definite correlation between the blood-compatibility of the polymers and the lack of effect of the polymeric materials on the structure of the incorporated water.
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Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama 930-8555, Japan.
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Råsmark PJ, Andersson M, Lindgren J, Elvingson C. Differences in binding of a cationic surfactant to cross-linked sodium poly(acrylate) and sodium poly(styrene sulfonate) studied by Raman spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:2761-2765. [PMID: 15779946 DOI: 10.1021/la0468693] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Raman spectroscopy has been used to investigate the structure of gel-surfactant complexes. Cross-linked sodium poly(acrylate) and sodium poly(styrene sulfonate) were immersed in solutions of the cationic surfactant dodecyl trimethylammonium bromide. During the deswelling process, two distinct regions could be observed for both types of gels. Looking at the Raman spectra, however, for the poly(styrene sulfonate), the surfactant could be found throughout the gel particle, whereas for poly(acrylate), essentially all the surfactant was bound in a surface layer.
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Affiliation(s)
- Per Johan Råsmark
- Department of Physical Chemistry, Uppsala University, Box 579, S-751 23 Uppsala, Sweden
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Kitano H, Imai M, Gemmei-Ide M, Takaha K. Raman spectroscopic study on the structure of water in aqueous solution of zwitterionic surfactants. J Colloid Interface Sci 2004; 269:459-65. [PMID: 14654407 DOI: 10.1016/j.jcis.2003.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The structure and hydrogen bonding of water in aqueous solutions of various surfactants were analyzed using the contours of the O-H stretching in the polarized Raman spectra. From the relative intensity of the collective band (C value) corresponding to a long-range coupling of the O-H stretching in the aqueous surfactant solutions, the number of hydrogen bonds disrupted due to the presence of one surfactant molecule (N(corr) value) was evaluated. The N(corr) value for decylsulfobetaine was slightly negative, whereas those for ordinary ionic surfactants such as sodium dodecylsulfate and dodecyltrimethylammonium chloride were large positive values. Furthermore, the N(corr) for carboxybetaine surfactant was a small positive value. These results suggest that zwitterionic surfactants do not disturb the hydrogen-bonded network structure of water significantly, probably due to the counteraction of the electrostriction effect by the proximity between the anionic and cationic groups.
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Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, 930-8555, Toyama, Japan.
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Sammon C, Deng C, Yarwood J. Polymer–water interactions. Origin of perturbed infrared intensities of water in polymeric systems. POLYMER 2003. [DOI: 10.1016/s0032-3861(03)00104-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kitano H, Imai M, Sudo K, Ide M. Hydrogen-Bonded Network Structure of Water in Aqueous Solution of Sulfobetaine Polymers. J Phys Chem B 2002. [DOI: 10.1021/jp020185r] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama 930-8555, Japan
| | - Makoto Imai
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama 930-8555, Japan
| | - Kurao Sudo
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama 930-8555, Japan
| | - Makoto Ide
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama 930-8555, Japan
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Abstract
Freeze-substitution is a physicochemical process in which biological specimens are immobilized and stabilized for microscopy. Water frozen within cells is replaced by organic solvents at subzero temperatures. Freeze-substitution is widely used for ultrastructural and immunocytochemical analyses of cells by transmission and scanning electron microscopy. Less well recognized is its superiority over conventional chemical fixation in preserving labile and rare tissue antigens for immunocytochemistry by light microscopy. In the postgenome era, the focus of molecular genetics will shift from analyzing DNA sequence structure to elucidating the function of gene networks, the intercellular effects of polygenetic diseases, and the conformational rearrangements of proteins in situ. Novel strategies will be needed to integrate knowledge of chemical structures of normal and abnormal macromolecules with the physiology and developmental biology of cells and tissues from whole organisms. This review summarizes the progress and future prospects of freeze-substitution for such explorations.
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Affiliation(s)
- R Shiurba
- Misato Inc., Satte-shi, Saitama, Japan
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The Structure of Water Sorbed to Polymethoxyethylacrylate Film as Examined by FT–IR Spectroscopy. J Colloid Interface Sci 2001. [DOI: 10.1006/jcis.2001.7785] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kitano H, Sudo K, Ichikawa K, Ide M, Ishihara K. Raman Spectroscopic Study on the Structure of Water in Aqueous Polyelectrolyte Solutions†. J Phys Chem B 2000. [DOI: 10.1021/jp000429c] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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