51
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Fundo JF, Carvalho A, Feio G, Silva CL, Quintas MA. Relationship between molecular mobility, microstructure and functional properties in chitosan/glycerol films. INNOV FOOD SCI EMERG 2015. [DOI: 10.1016/j.ifset.2015.01.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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52
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Water-induced local ordering of chitosan polymer chains in thin layer films. Carbohydr Polym 2015; 118:107-14. [DOI: 10.1016/j.carbpol.2014.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 10/31/2014] [Accepted: 11/03/2014] [Indexed: 11/20/2022]
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53
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Fundo JF, Quintas MAC, Silva CLM. Molecular Dynamics and Structure in Physical Properties and Stability of Food Systems. FOOD ENGINEERING REVIEWS 2015. [DOI: 10.1007/s12393-015-9109-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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54
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Chitosan/Chitin nanowhiskers composites: effect of plasticisers on the mechanical behaviour. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-014-0648-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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55
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Guitian Oliveira N, Sirgado T, Reis L, Pinto LF, da Silva CL, Ferreira FC, Rodrigues A. In vitro assessment of three dimensional dense chitosan-based structures to be used as bioabsorbable implants. J Mech Behav Biomed Mater 2014; 40:413-425. [DOI: 10.1016/j.jmbbm.2014.09.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 08/30/2014] [Accepted: 09/08/2014] [Indexed: 01/14/2023]
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56
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Chandran PL, Dimitriadis EK, Lisziewicz J, Speransky V, Horkay F. DNA nanoparticles with core-shell morphology. SOFT MATTER 2014; 10:7653-60. [PMID: 25137385 PMCID: PMC4348574 DOI: 10.1039/c4sm00908h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Mannobiose-modified polyethylenimines (PEI) are used in gene therapy to generate nanoparticles of DNA that can be targeted to the antigen-presenting cells of the immune system. We report that the sugar modification alters the DNA organization within the nanoparticles from homogenous to shell-like packing. The depth-dependent packing of DNA within the nanoparticles was probed using AFM nano-indentation. Unmodified PEI-DNA nanoparticles display linear elastic properties and depth-independent mechanics, characteristic of homogenous materials. Mannobiose-modified nanoparticles, however, showed distinct force regimes that were dependent on indentation depth, with 'buckling'-like response that is reproducible and not due to particle failure. By comparison with theoretical studies of spherical shell mechanics, the structure of mannobiosylated particles was deduced to be a thin shell with wall thickness in the order of few nanometers, and a fluid-filled core. The shell-core structure is also consistent with observations of nanoparticle denting in altered solution conditions, with measurements of nanoparticle water content from AFM images, and with images of DNA distribution in Transmission Electron Microscopy.
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Affiliation(s)
- Preethi L. Chandran
- Section on Tissue Biophysics and Biomimetics, PPITS, NICHD
- Biomedical Engineering and Physical Science Shared Resource, NIBIB, Bldg 13, 13 South Drive, National Institutes of Health, Bethesda, MD 20892, USA
| | - Emilios K. Dimitriadis
- Biomedical Engineering and Physical Science Shared Resource, NIBIB, Bldg 13, 13 South Drive, National Institutes of Health, Bethesda, MD 20892, USA
| | | | - Vlad Speransky
- Biomedical Engineering and Physical Science Shared Resource, NIBIB, Bldg 13, 13 South Drive, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ferenc Horkay
- Section on Tissue Biophysics and Biomimetics, PPITS, NICHD
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Fundo JF, Fernandes R, Almeida PM, Carvalho A, Feio G, Silva CL, Quintas MA. Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films. Food Chem 2014; 144:2-8. [DOI: 10.1016/j.foodchem.2013.05.127] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 04/30/2013] [Accepted: 05/28/2013] [Indexed: 11/30/2022]
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58
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Alperstein D, Knani D. Toward computational design of efficient plasticizers for nylon. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3240] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- David Alperstein
- Department of Mechanical Engineering; ORT Braude College; P.O. Box 78 Karmiel 21982 Israel
| | - Dafna Knani
- Department of Biotechnology Engineering; ORT Braude College; P.O. Box 78 Karmiel 21982 Israel
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59
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Catauro M, Bollino F, Papale F, Pacifico S, Galasso S, Ferrara C, Mustarelli P. Synthesis of zirconia/polyethylene glycol hybrid materials by sol–gel processing and connections between structure and release kinetic of indomethacin. Drug Deliv 2013; 21:595-604. [DOI: 10.3109/10717544.2013.865816] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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60
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Real DA, Martinez MV, Frattini A, Soazo M, Luque AG, Biasoli MS, Salomon CJ, Olivieri AC, Leonardi D. Design, characterization, and in vitro evaluation of antifungal polymeric films. AAPS PharmSciTech 2013; 14:64-73. [PMID: 23225117 DOI: 10.1208/s12249-012-9894-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/09/2012] [Indexed: 11/30/2022] Open
Abstract
The objective of the present paper was the development and the full characterization of antifungal films. Econazole nitrate (ECN) was loaded in a polymeric matrix formed by chitosan (CH) and carbopol 971NF (CB). Polyethylene glycol 400 and sorbitol were used as plasticizing agents. The mechanical properties of films were poorer when the drug was loaded, probably because crystals of ENC produces network outages and therefore reduces the polymeric interactions between the polymers. Polymers-ECN and CH-CB interactions were analyzed by Fourier-transform infrared spectroscopy (FTIR), thermal gravimetry analysis, and differential thermal analysis (DTA-TGA). ECN did not show structure alterations when loaded into the films. In scanning electron microphotographs and atomic force microscopy analysis, films prepared with CB showed an evident wrinkle pattern probably due to the strong interactions between the polymers, which were observed by FTIR and DTA-TGA. The in vitro activity of the formulations against Candida krusei and Candida parapsilosis was twice as greater as the commercial cream, probably as a result of the antifungal combination of the drug with the CH activity. All these results suggest that these polymeric films containing ECN are potential candidates in view of alternatives dosages forms for the treatment of the yeast assayed.
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61
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Hetayothin B, Cabaniss RA, Blum FD. Dynamics of Di(propylene glycol) Dibenzoate-d10 in Poly(vinyl acetate) by Solid-State Deuterium NMR. Macromolecules 2012. [DOI: 10.1021/ma301463n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Boonta Hetayothin
- Department of Chemistry and
Materials Research Center, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Roy A. Cabaniss
- Department of Computer Science, Missouri University of Science and Technology, Rolla,
Missouri 65409, United States
| | - Frank D. Blum
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078,
United States
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62
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Domján A, Fodor C, Kovács S, Marek T, Iván B, Süvegh K. Anomalous Swelling Behavior of Poly(N-vinylimidazole)-l-Poly(tetrahydrofuran) Amphiphilic Conetwork in Water Studied by Solid-State NMR and Positron Annihilation Lifetime Spectroscopy. Macromolecules 2012. [DOI: 10.1021/ma301533g] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | | | - Szabolcs Kovács
- Department of Nuclear Chemistry, Eötvös Loránd Science University, P.O. Box 32, H-1518
Budapest, Hungary
| | - Tamás Marek
- Department
of Surface Modifications
and Nanostructures, Institute of Materials and Environmental Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri u. 59-67, P.O. Box 17, H-1525
Budapest, Hungary
| | | | - Károly Süvegh
- Department of Nuclear Chemistry, Eötvös Loránd Science University, P.O. Box 32, H-1518
Budapest, Hungary
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63
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Patel AK, Michaud P, Petit E, de Baynast H, Grédiac M, Mathias JD. Development of a chitosan-based adhesive. Application to wood bonding. J Appl Polym Sci 2012. [DOI: 10.1002/app.38097] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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64
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Patel AK, Michaud P, de Baynast H, Grédiac M, Mathias JD. Preparation of chitosan-based adhesives and assessment of their mechanical properties. J Appl Polym Sci 2012. [DOI: 10.1002/app.37685] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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65
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Chen JL, Zhao Y. Effect of Molecular Weight, Acid, and Plasticizer on the Physicochemical and Antibacterial Properties of β-Chitosan Based Films. J Food Sci 2012; 77:E127-36. [DOI: 10.1111/j.1750-3841.2012.02686.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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66
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67
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Gartner C, López BL, Sierra L, Graf R, Spiess HW, Gaborieau M. Interplay between structure and dynamics in chitosan films investigated with solid-state NMR, dynamic mechanical analysis, and X-ray diffraction. Biomacromolecules 2011; 12:1380-6. [PMID: 21395265 PMCID: PMC3074573 DOI: 10.1021/bm200193u] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 03/10/2011] [Indexed: 11/28/2022]
Abstract
Modern solid-state NMR techniques, combined with X-ray diffraction, revealed the molecular origin of the difference in mechanical properties of self-associated chitosan films. Films cast from acidic aqueous solutions were compared before and after neutralization, and the role of the counterion (acetate vs Cl(-)) was investigated. There is a competition between local structure and long-range order. Hydrogen bonding gives good mechanical strength to neutralized films, which lack long-range organization. The long-range structure is better defined in films cast from acidic solutions in which strong electrostatic interactions cause rotational distortion around the chitosan chains. Plasticization by acetate counterions enhances long-range molecular organization and film flexibility. In contrast, Cl(-) counterions act as a defect and impair the long-range organization by immobilizing hydration water. Molecular motion and proton exchange are restricted, resulting in brittle films despite the high moisture content.
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Affiliation(s)
- Carmiña Gartner
- University of Antioquia, Calle 62 No. 52-59. Lab. 310, Sede de Investigaciones Universitarias, SIU. Medellín, Colombia
| | - Betty Lucy López
- University of Antioquia, Calle 62 No. 52-59. Lab. 310, Sede de Investigaciones Universitarias, SIU. Medellín, Colombia
| | - Ligia Sierra
- University of Antioquia, Calle 62 No. 52-59. Lab. 310, Sede de Investigaciones Universitarias, SIU. Medellín, Colombia
| | - Robert Graf
- Max-Planck Institute for Polymer Research, Postfach 3148, D-55021 Mainz, Germany
| | - Hans W. Spiess
- Max-Planck Institute for Polymer Research, Postfach 3148, D-55021 Mainz, Germany
| | - Marianne Gaborieau
- Max-Planck Institute for Polymer Research, Postfach 3148, D-55021 Mainz, Germany
- University of Western Sydney, Nanoscale Organisation and Dynamics Group, School of Biomedical and Health Sciences, Campbelltown Campus, Building 21, Locked Bag 1797, Penrith NSW 2751, Australia
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68
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Lu L, Chen W. Biocompatible composite actuator: a supramolecular structure consisting of the biopolymer chitosan, carbon nanotubes, and an ionic liquid. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:3745-3748. [PMID: 20512819 DOI: 10.1002/adma.201001134] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Luhua Lu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215125, P. R. China
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69
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Huang Y, Yu H, Guo L, Huang Q. Structure and self-assembly properties of a new chitosan-based amphiphile. J Phys Chem B 2010; 114:7719-26. [PMID: 20481638 PMCID: PMC3226067 DOI: 10.1021/jp9122216] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new chitosan-based amphiphile, octanoyl-chitosan-polyethylene glycol monomethyl ether (acylChitoMPEG), has been prepared using both hydrophobic octanoyl and hydrophilic polyethylene glycol monomethyl ether (MPEG) substitutions. The success of synthesis was confirmed by Fourier transform infrared (FT-IR) and (1)H NMR spectroscopy. The synthesized acylChitoMPEG exhibited good solubility in either aqueous solution or common organic solvents such as ethanol, acetone, and CHCl(3). The self-aggregation behavior of acylChitoMPEG in solutions was studied by a combination of pyrene fluorescence technique, dynamic light scattering, atomic force microscopy, and small-angle X-ray scattering (SAXS). The critical aggregation concentration (CAC) and hydrodynamic diameter were found to be 0.066 mg/mL and 24.4 nm, respectively. SAXS results suggested a coiled structure of the triple helical acylChitoMPEG backbone with the hydrophobic moieties hiding in the center of the backbone, and the hydrophilic MPEG chains surrounding the acylChitoMPEG backbone in a random Gaussian chain conformation. Cytotoxicity results showed that acylChitoMPEG exhibited negligible cytotoxicity even at concentrations as high as 1.0 mg/mL. All results implied that acylChitoMPEG has the potential to be used for biological or medical applications.
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Affiliation(s)
| | | | | | - Qingrong Huang
- Author to whom correspondence should be addressed. Tel: 732-932-7193. Fax: 732-932-6776.
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