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Fernandes GLP, Vanim MM, Delbem ACB, Martorano AS, Raucci LMSDC, de Oliveira PT, Zucolotto V, Dias BJM, Brighenti FL, de Oliveira AB, Moraes JCS, de Camargo ER, Danelon M. Antibacterial, cytotoxic and mechanical properties of a orthodontic cement with phosphate nano-sized and phosphorylated chitosan: An in vitro study. J Dent 2024; 146:105073. [PMID: 38782176 DOI: 10.1016/j.jdent.2024.105073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/10/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024] Open
Abstract
OBJECTIVES Evaluate, in vitro, the effect of incorporating nano-sized sodium trimetaphosphate (TMPnano) and phosphorylated chitosan (Chi-Ph) into resin-modified glass ionomer cement (RMGIC) used for orthodontic bracket cementation, on mechanical, fluoride release, antimicrobial and cytotoxic properties. METHODS RMGIC was combined with Chi-Ph (0.25%/0.5%) and/or TMPnano (14%). The diametral compressive/tensile strength (DCS/TS), surface hardness (SH) and degree of conversion (%DC) were determined. For fluoride (F) release, samples were immersed in des/remineralizing solutions. Antimicrobial/antibiofilm activity was evaluated by the agar diffusion test and biofilm metabolism (XTT). Cytotoxicity in fibroblasts was assessed with the resazurin method. RESULTS After 24 h, the RMGIC-14%TMPnano group showed a lower TS value (p < 0.001); after 7 days the RMGIC-14%TMPnano-0.25%Chi-Ph group showed the highest value (p < 0.001). For DCS, the RMGIC group (24 h) showed the highest value (p < 0.001); after 7 days, the highest value was observed for the RMGIC-14%TMPnano-0.25%Chi-Ph (p < 0.001). RMGIC-14%TMPnano, RMGIC-14%TMPnano-0.25%Chi-Ph, RMGIC-14%TMPnano-0.5%Chi-Ph showed higher and similar release of F (p > 0.001). In the SH, the RMGIC-0.25%Chi-Ph; RMGIC-0.5%Chi-Ph; RMGIC-14%TMPnano-0.5%Chi-Ph groups showed similar results after 7 days (p > 0.001). The RMGIC-14%TMPnano-0.25%Chi-Ph group showed a better effect on microbial/antibiofilm growth, and the highest efficacy on cell viability (p < 0.001). After 72 h, only the RMGIC-14%TMPnano-0.25%Chi-Ph group showed cell viability (p < 0.001). CONCLUSION The RMGIC-14%TMPnano-0.25%Chi-Ph did not alter the physical-mechanical properties, was not toxic to fibroblasts and reduced the viability and metabolism of S. mutans. CLINICAL RELEVANCE The addition of phosphorylated chitosan and organic phosphate to RMGIC could provide an antibiofilm and remineralizing effect on the tooth enamel of orthodontic patients, who are prone to a high cariogenic challenge due to fluctuations in oral pH and progression of carious lesions.
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Affiliation(s)
- Gabriela Leal Peres Fernandes
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP, 16015-050, Brazil
| | - Manuela Marquesini Vanim
- School of Dentistry, University of Ribeirão Preto - UNAERP, Ribeirão Preto, SP, 14096-900, Brazil
| | - Alberto Carlos Botazzo Delbem
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP, 16015-050, Brazil
| | | | | | | | - Valtencir Zucolotto
- São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | | | - Fernanda Lourenção Brighenti
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, São Paulo State University (Unesp), School of Dentistry, R. Humaitá, 1680 - Centro, Araraquara, São Paulo 14801-903, Brazil
| | - Analú Barros de Oliveira
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, São Paulo State University (Unesp), School of Dentistry, R. Humaitá, 1680 - Centro, Araraquara, São Paulo 14801-903, Brazil
| | - João Carlos Silos Moraes
- Department of Physics and Chemistry, São Paulo State University (UNESP), Ilha Solteira, SP, Brazil
| | - Emerson Rodrigues de Camargo
- Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Marcelle Danelon
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP, 16015-050, Brazil.
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Romal JRA, Ong SK. Opportunity for a greener recovery of dysprosium(III) from secondary sources by a novel Mannich reaction-modified phosphorylated chitosan hydrogel. Int J Biol Macromol 2024; 267:131449. [PMID: 38599422 DOI: 10.1016/j.ijbiomac.2024.131449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/23/2024] [Accepted: 04/05/2024] [Indexed: 04/12/2024]
Abstract
The depleting supply of natural sources of rare earth elements (REE) is a concern to many nations as demand for advanced technology is becoming vital for national security. In this communication, the recovery of dysprosium(III) from aqueous systems was exemplified by a modified phosphorylated chitosan (PCs/MB) prepared by the C-Mannich reaction of phosphorylated chitosan, glutaraldehyde, and 4-hydroxycoumarin in ethanolic solution. Batch adsorption studies achieved a maximum adsorption capacity (qmax) of 34 mg/g at 25 °C and pH = 5.4 for 2 h. Fourier Transform-Infrared Spectroscopy, elemental mapping, and quantitative analyses revealed ion-exchange mechanism with C6-phosphate and a synergistic complexation with the amino group between two hexose units of the chitosan chain confirming the correlation provided by the pseudo-second order kinetics (R2 = 0.9996), extrapolated mean free energy of adsorption (Eads) of 12.9 kJ/mol from the corrected Dubinin-Radushkevich isotherm, and the extrapolated enthalpy of adsorption (ΔH0ads) of -42.4 kJ/mol from the linearized Van't Hoff plot. Competitive adsorption with iron(II), cerium(III), and neodymium(III) demonstrated preferential removal of dysprosium(III) and complete exclusion of iron(II), which illustrates potential application in the separation of REE from electronic wastes.
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Affiliation(s)
- John Rey Apostol Romal
- Department of Chemistry and Physics, Grand View University, Des Moines, IA 50316, USA; Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, USA.
| | - Say Kee Ong
- Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, USA
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Cabrera-Barjas G, Jimenez R, Romero R, Valdes O, Nesic A, Hernández-García R, Neira A, Alejandro-Martín S, de la Torre AF. Value-added long-chain aliphatic compounds obtained through pyrolysis of phosphorylated chitin. Int J Biol Macromol 2023; 238:124130. [PMID: 36963553 DOI: 10.1016/j.ijbiomac.2023.124130] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 03/03/2023] [Accepted: 03/18/2023] [Indexed: 03/26/2023]
Abstract
In this work, chitin, as a biobased polymer, is used as a precursor to obtain a phosphorylated derivatives. The influence of the different degree of phosphorylation in chitin on pyrolysis pattern was investigated. In order to understand the pyrolysis mechanism and the potential application of phosphorylated chitins, the samples were pyrolyzed at different temperatures and analyzed by FTIR, SEM, and Py-GC/MS analysis. Moreover, the thermal degradation and the evolved gases during chitin degradation and its derivatives were measured. The results showed that phosphorylation of chitin decreased the thermal stability of biopolymer and significantly changed the pattern of pyrolysis compared to neat chitin. The production of long-chain hydrocarbons was detected during pyrolysis of phosphorylated chitin, whereas this was not the case with raw chitin. Those two effects were more pronounced as the degree of phosphorylation increased. Chitin with the degree of phosphorylation (DS 1.35) exhibited the highest selectivity (91 %) towards production of long-chain hydrocarbons (C12-C17) at 500 °C. Moreover, the obtained results allowed to propose, for the first time, the mechanism of pyrolysis of phosphorylated chitin.
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Affiliation(s)
- Gustavo Cabrera-Barjas
- Universidad de Concepción, Unidad de Desarrollo Tecnológico, UDT, Av. Cordillera 2634, Parque Industrial Coronel, Coronel, Biobío, Chile.
| | - Romel Jimenez
- Carbon and Catalysis Laboratory (CarboCat), Department of Chemical Engineering, Universidad de Concepción, Concepción, Chile
| | - Romina Romero
- Departamento Química Analítica e Inorgánica Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Oscar Valdes
- Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, Talca, Chile.
| | - Aleksandra Nesic
- University of Belgrade, Vinca Institute of Nuclear Sciences-National Institute of the Republic of Serbia, 12-14 Mike Petrovića Street, Belgrade, 11000, Serbia
| | - Ruber Hernández-García
- Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, Talca, Chile
| | - Andrónico Neira
- Department of Biological and Animal Science, University of Chile, Santa Rosa 11735, La Pintana, Santiago, Chile
| | | | - Alexander F de la Torre
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
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Anti-biofouling multi-modified chitosan/polyvinylalcohol air-blown nanofibers for selective radionuclide capture in wastewater. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yeh YY, Tsai YT, Wu CY, Tu LH, Bai MY, Yeh YC. The role of aldehyde-functionalized crosslinkers on the property of chitosan hydrogels. Macromol Biosci 2022; 22:e2100477. [PMID: 35103401 DOI: 10.1002/mabi.202100477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/22/2022] [Indexed: 11/10/2022]
Abstract
XXXX This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ying-Yu Yeh
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Ting Tsai
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chun-Yu Wu
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei, 10617, Taiwan
| | - Ling-Hsien Tu
- Department of Chemistry, National Taiwan Normal University, Taipei, 11677, Taiwan
| | - Meng-Yi Bai
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei, 10617, Taiwan.,Biomedical Engineering Program, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, 10617, Taiwan.,Adjunct Appointment to the Department of Biomedical Engineering, National Defense Medical Center, Taipei, 11490, Taiwan
| | - Yi-Cheun Yeh
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan
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Yaneva Z, Ivanova D, Nikolova N, Tzanova M. The 21st century revival of chitosan in service to bio-organic chemistry. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1731333] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Zvezdelina Yaneva
- Faculty of Veterinary Medicine, Department of Pharmacology, Animal Physiology and Physiological Chemistry, Trakia University, Stara Zagora, Bulgaria
| | - Donika Ivanova
- Faculty of Veterinary Medicine, Department of Pharmacology, Animal Physiology and Physiological Chemistry, Trakia University, Stara Zagora, Bulgaria
| | - Nevena Nikolova
- Faculty of Veterinary Medicine, Radioecology and Ecology Unit, Trakia University, Stara Zagora, Bulgaria
| | - Milena Tzanova
- Faculty of Agriculture, Department of Biochemistry, Microbiology and Physics, Trakia University, Stara Zagora, Bulgaria
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Sang Z, Qian J, Han J, Deng X, Shen J, Li G, Xie Y. Comparison of three water-soluble polyphosphate tripolyphosphate, phytic acid, and sodium hexametaphosphate as crosslinking agents in chitosan nanoparticle formulation. Carbohydr Polym 2020; 230:115577. [DOI: 10.1016/j.carbpol.2019.115577] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 10/23/2019] [Accepted: 11/06/2019] [Indexed: 12/12/2022]
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Bombaldi de Souza RF, Bombaldi de Souza FC, Thorpe A, Mantovani D, Popat KC, Moraes ÂM. Phosphorylation of chitosan to improve osteoinduction of chitosan/xanthan-based scaffolds for periosteal tissue engineering. Int J Biol Macromol 2020; 143:619-632. [DOI: 10.1016/j.ijbiomac.2019.12.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/27/2019] [Accepted: 12/01/2019] [Indexed: 12/19/2022]
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Cheng YF, Zhang JY, Wang YB, Li CM, Lu ZS, Hu XF, Xu LQ. Deposition of catechol-functionalized chitosan and silver nanoparticles on biomedical titanium surfaces for antibacterial application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 98:649-656. [DOI: 10.1016/j.msec.2019.01.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 12/21/2018] [Accepted: 01/06/2019] [Indexed: 01/01/2023]
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10
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Huo X, Li W, Wang Y, Han N, Wang J, Wang N, Zhang X. Chitosan composite microencapsulated comb-like polymeric phase change material via coacervation microencapsulation. Carbohydr Polym 2018; 200:602-610. [DOI: 10.1016/j.carbpol.2018.08.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/01/2018] [Accepted: 08/01/2018] [Indexed: 11/30/2022]
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11
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Synthesis and characterization of chitosan ascorbate nanoparticles for therapeutic inhibition for cervical cancer and their in silico modeling. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Phosphorylated chitin as a chemically modified polymer for ecofriendly corrosion inhibition of copper in aqueous chloride environment. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-2964-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Holder SL, Lee CH, Popuri SR. Simultaneous wastewater treatment and bioelectricity production in microbial fuel cells using cross-linked chitosan-graphene oxide mixed-matrix membranes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:13782-13796. [PMID: 28401395 DOI: 10.1007/s11356-017-8839-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/15/2017] [Indexed: 06/07/2023]
Abstract
Microbial fuel cells (MFCs) are emerging technology for wastewater treatment by chemical oxygen demand (COD) reduction and simultaneous bioelectricity production. Fabrication of an effective proton exchange membrane (PEM) is a vital component for MFC performance. In this work, green chitosan-based (CS) PEMs were fabricated with graphene oxide (GO) as filler material (CS-GO) and cross-linked with phosphoric acid (CS-GO-P(24)) or sulfuric acid (CS-GO-S(24)) to determine their effect on PEM properties. Interrogation of the physicochemical, thermal, and mechanical properties of the cross-linked CS-GO PEMs demonstrated that ionic cross-linking based on the incorporation of PO43- groups in the CS-GO mixed-matrix composites, when compared with sulfuric acid cross-linking commonly used in proton exchange membrane fuel cell (PEMFC) studies, generated additional density of ionic cluster domains, rendered enhanced sorption properties, and augmented the thermal and mechanical stability of the composite structure. Consequently, bioelectricity performance analysis in MFC application showed that CS-GO-P(24) membrane produced 135% higher power density than the CS-GO-S(24) MFC system. Simultaneously, 89.52% COD removal of primary clarifier municipal wastewater was achieved in the MFC operated with the CS-GO-P(24) membrane.
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Affiliation(s)
- Shima L Holder
- Department of Environmental Engineering, Da-Yeh University, Changhua, 51591, Taiwan, People's Republic of China
| | - Ching-Hwa Lee
- Department of Environmental Engineering, Da-Yeh University, Changhua, 51591, Taiwan, People's Republic of China
| | - Srinivasa R Popuri
- The University of the West Indies, Cave Hill Campus, Bridgetown, 11000, Barbados.
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K. VK, B. V. AR. Chemically modified biopolymer as an eco-friendly corrosion inhibitor for mild steel in a neutral chloride environment. NEW J CHEM 2017. [DOI: 10.1039/c7nj00553a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work mainly focuses on the development of an eco-friendly corrosion inhibitor (phosphorylated chitin) which enables us to minimize the use of hazardous substances as corrosion inhibitors.
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Affiliation(s)
- Vimal Kumar K.
- Department of Chemistry
- National Institute of Technology Warangal
- Warangal-506004
- India
| | - Appa Rao B. V.
- Department of Chemistry
- National Institute of Technology Warangal
- Warangal-506004
- India
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Giretova M, Medvecky L, Stulajterova R, Sopcak T, Briancin J, Tatarkova M. Effect of enzymatic degradation of chitosan in polyhydroxybutyrate/chitosan/calcium phosphate composites on in vitro osteoblast response. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:181. [PMID: 27770394 DOI: 10.1007/s10856-016-5801-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/14/2016] [Indexed: 06/06/2023]
Abstract
Polyhydroxybutyrate/chitosan/calcium phosphate composites are interesting biomaterials for utilization in regenerative medicine and they may by applied in reconstruction of deeper subchondral defects. Insufficient informations were found in recent papers about the influence of lysozyme degradation of chitosan in calcium phosphate/chitosan based composites on in vitro cytotoxicity and proliferation activity of osteoblasts. The effect of enzymatic chitosan degradation on osteoblasts proliferation was studied on composite films in which the porosity of origin 3D scaffolds was eliminated and the surface texture was modified. The significantly enhanced proliferation activity with faster population growth of osteoblasts were found on enzymatically degraded biopolymer composite films with α-tricalcium phosphate and nanohydroxyapatite. No cytotoxicity of composite films prepared from lysozyme degraded scaffolds containing a large fraction of low molecular weight chitosans (LMWC), was revealed after 10 days of cultivation. Contrary to above in the higher cytotoxicity origin untreated nanohydroxyapatite films and porous composite scaffolds. The results showed that the synergistic effect of surface distribution, morphology of nanohydroxyapatite particles, microtopography and the presence of LMWC due to chitosan degradation in composite films were responsible for compensation of the cytotoxicity of nanohydroxyapatite composite films or porous composite scaffolds.
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Affiliation(s)
- Maria Giretova
- Institute of Materials Research of SAS, Watsonova 47, 04001, Kosice, Slovakia.
| | - Lubomir Medvecky
- Institute of Materials Research of SAS, Watsonova 47, 04001, Kosice, Slovakia
| | | | - Tibor Sopcak
- Institute of Materials Research of SAS, Watsonova 47, 04001, Kosice, Slovakia
| | - Jaroslav Briancin
- Institute of Geotechnics of SAS, Watsonova 47, 04001, Kosice, Slovakia
| | - Monika Tatarkova
- Institute of Materials Research of SAS, Watsonova 47, 04001, Kosice, Slovakia
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LogithKumar R, KeshavNarayan A, Dhivya S, Chawla A, Saravanan S, Selvamurugan N. A review of chitosan and its derivatives in bone tissue engineering. Carbohydr Polym 2016; 151:172-188. [DOI: 10.1016/j.carbpol.2016.05.049] [Citation(s) in RCA: 328] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/24/2016] [Accepted: 05/15/2016] [Indexed: 10/21/2022]
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17
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Holder SL, Lee CH, Popuri SR, Zhuang MX. Enhanced surface functionality and microbial fuel cell performance of chitosan membranes through phosphorylation. Carbohydr Polym 2016; 149:251-62. [DOI: 10.1016/j.carbpol.2016.04.118] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/26/2016] [Accepted: 04/27/2016] [Indexed: 12/18/2022]
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Chatrabhuti S, Chirachanchai S. Chitosan core-corona nanospheres: A convenient material to tailor pH and solvent responsive magnetic nanoparticles. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.05.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Chongprakobkit S, Maniratanachote R, Tachaboonyakiat W. Oil-in-water emulsions stabilized by sodium phosphorylated chitosan. Carbohydr Polym 2013; 96:82-90. [PMID: 23688457 DOI: 10.1016/j.carbpol.2013.03.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Revised: 02/21/2013] [Accepted: 03/20/2013] [Indexed: 10/27/2022]
Abstract
Oil-in-water (O/W) emulsions with sodium phosphorylated chitosan (PCTS) were obtained via simple emulsification. PCTS in aqueous solution was amphiphilic with a hydrophilic-lipophilic balance (HLB) of 19 and a critical aggregation concentration (CAC) of 0.13% w/v. The emulsifying efficiency and emulsion stability of PCTS over oil droplets were evaluated in terms of the droplet size, droplet size distribution and microscopic observation using confocal laser scanning microscopy. PCTS preferred to cover oil droplets to produce an O/W emulsion and formed long term stable particles (90 days storage at room temperature) when using PCTS concentrations from above the CAC to 3% w/v. However, emulsions formed from PCTS concentrations below the CAC or over 3% w/v were unstable with particle agglomeration by flocculation after only 7 days storage, although they reverted to individual droplets that retained their integrity in acidic conditions. Overall, PCTS forms effective stable O/W encapsulated particles with potential applications in lipophilic drug encapsulation via a simple emulsion system.
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Affiliation(s)
- Suchada Chongprakobkit
- Nanoscience and Technology Program, Graduate School, Chulalongkorn University, 254 Phayathai Road, Patumwan, Bangkok 10330, Thailand
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Srakaew V, Ruangsri P, Suthin K, Thunyakitpisal P, Tachaboonyakiat W. Sodium-phosphorylated chitosan/zinc oxide complexes and evaluation of their cytocompatibility: An approach for periodontal dressing. J Biomater Appl 2011; 27:403-12. [DOI: 10.1177/0885328211408371] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to evaluate the possibility of metal complex formation between sodium-phosphorylated chitosan (PCTS) and ZnO. The polymer–metal complex formation was investigated in terms of thermal degradation. The structure deduction of the PCTS/ZnO complex was investigated by means of Fourier transform infrared spectroscopy and X-ray diffraction (XRD). The PCTS/ZnO complexes were formed by the sharing of lone pairs of electrons from the N atoms in the amine groups and O atoms in the phosphate and hydroxyl groups of PCTS to the protonated hydroxyl species on the ZnO surface. Because complex formation occurred at the surface of ZnO particles, it did not change the ZnO crystalline structure. Cytotoxicity, evaluated by a direct contact test with primary human gingival fibroblast cells, revealed that PCTS was biocompatible and reduced the cytotoxicity of ZnO by complexation, making PCTS/ZnO complexes potentially biocompatible. Within the limits of these data, it appears that PCTS could be used as a reaction rate-modifying agent in periodontal dressings.
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Affiliation(s)
- Veeranuch Srakaew
- Department of Materials Science, Faculty of Science, Chulalongkorn University, Phyathai, Patumwan, Bangkok 10330, Thailand
| | - Praphansri Ruangsri
- Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, P.O. Box 17, 15 Karnjanawanich Road, HatYai, Songkhla 90112, Thailand
| | - Kanyarat Suthin
- Dental Sea Clinic, 39/3 Prabarami Road, Patong, Kathu, Phuket 83150, Thailand
| | - Pasutha Thunyakitpisal
- Department of Anatomy, Dental Biomaterial Sciences Program, Faculty of Dentistry, Chulalongkorn University, Henri-Dunant Rd, Patumwan, Bangkok 10330, Thailand
- Unit Cell for Research and Development of Herbals and Natural Products for Dental Application, Faculty of Dentistry, Chulalongkorn University, Henri-Dunant Rd, Patumwan, Bangkok 10330, Thailand
| | - Wanpen Tachaboonyakiat
- Department of Materials Science, Faculty of Science, Chulalongkorn University, Phyathai, Patumwan, Bangkok 10330, Thailand
- Unit Cell for Research and Development of Herbals and Natural Products for Dental Application, Faculty of Dentistry, Chulalongkorn University, Henri-Dunant Rd, Patumwan, Bangkok 10330, Thailand
- Center for Petroleum, Petrochemicals and Advanced Materials, Chulalongkorn University, Bangkok 10330, Thailand
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