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Madian NG, El-Ashmanty BA, Abdel-Rahim HK. Improvement of Chitosan Films Properties by Blending with Cellulose, Honey and Curcumin. Polymers (Basel) 2023; 15:2587. [PMID: 37376233 DOI: 10.3390/polym15122587] [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: 04/30/2023] [Revised: 05/25/2023] [Accepted: 05/27/2023] [Indexed: 06/29/2023] Open
Abstract
Chitosan is a natural biopolymer that can be used in biomedical applications, tissue engineering, and wound dressing because of its biodegradability, biocompatibility, and antibacterial activity. The blending of chitosan films with natural biomaterials such as cellulose, honey, and curcumin was studied at different concentrations in order to improve their physical properties. Fourier transform infrared (FTIR) spectroscopy, mechanical tensile properties, X-ray diffraction (XRD), antibacterial effects, and scanning electron microscopy (SEM) were studied for all blended films. The XRD, FTIR, and mechanical results showed that films blended with curcumin were more rigid and compatible and had higher antibacterial effects than other blended films. In addition, XRD and SEM showed that blending chitosan films with curcumin decreases the crystallinity of the chitosan matrix compared to cellulose and honey blending films due to increased intermolecular hydrogen bonding, which reduces the close packing of the CS matrix.
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Affiliation(s)
- Noha G Madian
- Biophysics Department, Faculty of Science, Cairo University, Giza 12613, Egypt
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Superporous hydrogels based on blends of chitosan and polyvinyl alcohol as a carrier for enhanced gastric delivery of resveratrol. Saudi Pharm J 2023; 31:335-347. [PMID: 37026050 PMCID: PMC10071363 DOI: 10.1016/j.jsps.2023.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 01/02/2023] [Indexed: 01/07/2023] Open
Abstract
Resveratrol exhibits a number of pharmacological properties, notably antioxidant, anti-inflammatory and anti-cancer activities which are beneficial for the treatment of gastric diseases. However, the poor aqueous solubility and rapid metabolism are the important limitations in clinical uses. Superporous hydrogels (SPHs) based on chitosan/PVA blends were developed as a carrier for resveratrol solid dispersion (Res_SD) to increase the solubility and achieve sustained drug release in the stomach. The SPHs were prepared by gas forming method using glyoxal and sodium bicarbonate as cross-linking agent and gas generator, respectively. The solid dispersions of resveratrol with PVP-K30 were prepared by solvent evaporation and incorporated into the superporous hydrogels. All formulations showed rapid absorption of simulated gastric fluid and reached the equilibrium swollen state within a few minutes. The water absorption ratio and mechanical strength of SPHs were predominantly affected by the chitosan content, with maximum values at 1400 % and 375 g/cm2, respectively. The Res_SD-loaded SPHs exhibited good floating properties and SEM micrographs revealed a highly interconnected pores structure with size around 150 μm. Resveratrol was efficiently entrapped within the SPHs at levels between 64 and 90 % w/w and efficient drug release was sustained over 12 h dependent on the concentration of chitosan and PVA. The Res_SD-loaded SPHs exhibited slightly less cytotoxic efffect towards AGS cells than pure resveratrol. Furthermore, the formulation showed similar anti-inflammatory activity against RAW 264.7 cells compared with indomethacin.
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Iqbal N, Braxton TM, Anastasiou A, Raif EM, Chung CKY, Kumar S, Giannoudis PV, Jha A. Dicalcium Phosphate Dihydrate Mineral Loaded Freeze-Dried Scaffolds for Potential Synthetic Bone Applications. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6245. [PMID: 36143561 PMCID: PMC9506122 DOI: 10.3390/ma15186245] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/19/2022] [Accepted: 08/30/2022] [Indexed: 06/16/2023]
Abstract
Dicalcium Phosphate Dihydrate (DCPD) mineral scaffolds alone do not possess the mechanical flexibility, ease of physicochemical properties' tuneability or suitable porosity required for regenerative bone scaffolds. Herein, we fabricated highly porous freeze-dried chitosan scaffolds embedded with different concentrations of Dicalcium Phosphate Dihydrate (DCPD) minerals, i.e., 0, 20, 30, 40 and 50 (wt)%. Increasing DCPD mineral concentration led to increased scaffold crystallinity, where the % crystallinity for CH, 20, 30, 40, and 50-DCPD scaffolds was determined to be 0.1, 20.6, 29.4, 38.8 and 69.9%, respectively. Reduction in scaffold pore size distributions was observed with increasing DCPD concentrations of 0 to 40 (wt)%; coalescence and close-ended pore formation were observed for 50-DCPD scaffolds. 50-DCPD scaffolds presented five times greater mechanical strength than the DCPD mineral-free scaffolds (CH). DCPD mineral enhanced cell proliferation for the 20, 30 and 40-DCPD scaffolds. 50-DCPD scaffolds presented reduced pore interconnectivity due to the coalescence of many pores in addition to the creation of closed-ended pores, which were found to hinder osteoblast cell proliferation.
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Affiliation(s)
- Neelam Iqbal
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
| | | | - Antonios Anastasiou
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M1 3AL, UK
| | - El Mostafa Raif
- Faculty of Medicine and Health, School of Dentistry, University of Leeds, Leeds LS2 9JT, UK
| | | | - Sandeep Kumar
- Faculty of Medicine and Health, School of Dentistry, University of Leeds, Leeds LS2 9JT, UK
| | - Peter V. Giannoudis
- Academic Department of Trauma and Orthopaedic Surgery, School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | - Animesh Jha
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
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Analysis of the aggregation mechanism of chondroitin sulfate/chitosan particles and fabrication of hydrogel cell scaffolds. Int J Biol Macromol 2022; 210:233-242. [PMID: 35537590 DOI: 10.1016/j.ijbiomac.2022.05.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/29/2022] [Accepted: 05/04/2022] [Indexed: 12/17/2022]
Abstract
In this study, the aggregation mechanism of polyion complex (PIC) particles from chitosan (CHI) and chondroitin sulfate C (CS) in phosphate-buffered saline (PBS) was analyzed, and a novel method for the fabrication of hydrogels via aggregation was developed. The PBS induced a decrease in the ζ-potential of the CS/CHI PIC particles, increase in their diameter, and aggregation in a concentration-dependent manner. The hydrogels prepared by mixing CS/CHI PIC particle dispersion and PBS showed the PIC components, with porous structure, high swelling ratio (161.4 ± 13.3%), and high storage moduli (26.2 ± 1.4 kPa). By mixing PBS with suspended adhesive cells and CS/CHI PIC particle dispersion, hydrogels with high cell-loading efficiency were successfully synthesized. The loaded cells within the hydrogels exhibited high viability, uniform distribution, and formation of cell aggregates. These results indicate that CS/CHI-based hydrogels have a potential application as three-dimensional scaffolds for cell culture in tissue engineering.
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Maaz Arif M, Khan SM, Gull N, Tabish TA, Zia S, Ullah Khan R, Awais SM, Arif Butt M. Polymer-based biomaterials for chronic wound management: Promises and challenges. Int J Pharm 2021; 598:120270. [PMID: 33486030 DOI: 10.1016/j.ijpharm.2021.120270] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 12/10/2020] [Accepted: 12/24/2020] [Indexed: 01/13/2023]
Abstract
Chronic non-healing wounds tender a great challenge to patients, physicians, and wound care professionals. In view of the increasing prevalence of chronic wounds due to ischemia, diabetic foot, venous, and pressure ulcers, their appropriate management requires significant attention. Along with the basic techniques of medical and surgical treatments; an ideal dressing is essential for a speedy recovery and rapid healing of such wounds. Mechanistic understanding of chronic wound pathology will not only help towards future directions for an ideal dressing model but also to resonant advance research related to specific dressings for various wound types. This review provides key insights into causes, pathophysiology, and critical issues pertaining to chronic wounds and their management. It also summarizes the challenges faced for chronic wound treatment and specified factors responsible for delayed healing. Moreover, this review delivers a detailed discussion on available polymeric materials (alginate, chitosan, hyaluronic acid, collagen, polyurethane, cellulose, dextran, gelatin, silk, and polyaniline), their functional characteristics, and usage as chronic wound healing agents for polymeric wound dressing development. Incorporation and comparison of the research studies for their thermal behavior, structural analysis, and microscopic studies by Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy, respectively and swelling studies of different polymeric materials are discussed. Additionally, studies of anatomy cum physiology of wound healing, pathophysiology, tissue engineering and advance healing management approaches makes the content of this review a significant tool for future studies on chronic wounds healing by polymeric wound dressings. In this review, polymeric wound dressings have been explained in terms of their structures, function, chemistry, and key characteristics. These features are directly linked to the polymeric systems' potential in the management of chronic wounds. These polymeric systems have gained promising success in solving real word global health problems. More recently, innovative approaches to fabricate the polymer dressings have been introduced, but their commercial, sustainable, and high-scale production largely remains unexplored. This review also summarizes the promises of polymeric wound dressings and provides a future perspective on how the clinical and commercial landscape could potentially be propelled by utilizing polymers in wound care management.
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Affiliation(s)
- Muhammad Maaz Arif
- Department of Community Health Sciences, Fatima Memorial Hospital College of Medicine and Dentistry, Lahore, Pakistan
| | - Shahzad Maqsood Khan
- Department of Polymer Engineering & Technology, University of the Punjab Lahore, Pakistan.
| | - Nafisa Gull
- Department of Polymer Engineering & Technology, University of the Punjab Lahore, Pakistan
| | - Tanveer A Tabish
- UCL Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - Saba Zia
- Department of Polymer Engineering & Technology, University of the Punjab Lahore, Pakistan
| | - Rafi Ullah Khan
- Department of Polymer Engineering & Technology, University of the Punjab Lahore, Pakistan
| | | | - Muhammad Arif Butt
- Institute of Chemical Engineering & Technology, University of the Punjab Lahore, Pakistan
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Ulag S, Ilhan E, Sahin A, Karademir Yilmaz B, kalaskar DM, Ekren N, Kilic O, Nuzhet Oktar F, Gunduz O. 3D printed artificial cornea for corneal stromal transplantation. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109744] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Electrospun Bilayer PAN/Chitosan Nanofiber Membranes Incorporated with Metal Oxide Nanoparticles for Heavy Metal Ion Adsorption. COATINGS 2020. [DOI: 10.3390/coatings10030285] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bilayer nanofiber membranes with enhanced adsorption and mechanical properties were produced by combining a layer of polyacrylonitrile (PAN) functionalized with metal oxides (MO) of ZnO or TiO2 with a layer of chitosan (CS) via consecutive electrospinning. The adsorption properties of the bilayer PAN/MO–CS nanofiber membranes against lead (Pb(II)) and cadmium (Cd(II)) ions were investigated, including the effects of the solution pH, initial ion concentrations, and interaction time. The integration of a CS layer into PAN/MO nanofibers increased the adsorption capacity of lead by 102% and cadmium by 405%, compared to PAN/MO single layer. The nonlinear optimization method showed that the pseudo-second-order kinetic model and Langmuir isotherm equation better described the adsorption results. More importantly, the incorporation of a supportive CS nanofiber layer enhanced the tensile strength of PAN/MO–CS bilayer by approximately 68% compared to the PAN/MO single layer, owing to the strong interaction between the fibers at the interface of the two layers.
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Optimization and in vivo evaluation of duloxetine hydrochloride buccoadhesive lyophilized tablets. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.04.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Tunable chitosan hydrogels for adsorption: Property control by biobased modifiers. Carbohydr Polym 2018; 196:135-145. [DOI: 10.1016/j.carbpol.2018.05.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 05/03/2018] [Accepted: 05/09/2018] [Indexed: 11/18/2022]
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Nagajothi AJ, Kannan R, Rajashabala S. Studies on electrochemical properties of poly (ethylene oxide)-based gel polymer electrolytes with the effect of chitosan for lithium–sulfur batteries. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-1993-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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SOHAIL MUHAMMAD, AHMAD MAHMOOD, MINHAS MUHAMMADUSMAN, RASHID HAROON, KHALID IKRIMA. Development and In Vitro Evaluation of High Molecular Weight Chitosan Based Polymeric Composites for Controlled Delivery of Valsartan. ADVANCES IN POLYMER TECHNOLOGY 2016. [DOI: 10.1002/adv.21558] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- MUHAMMAD SOHAIL
- Department of Pharmacy; COMSATS Institute of Information Technology; Abbottabad 22060 Pakistan
| | - MAHMOOD AHMAD
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur 63100 Pakistan
| | - MUHAMMAD USMAN MINHAS
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur 63100 Pakistan
| | - HAROON RASHID
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur 63100 Pakistan
| | - IKRIMA KHALID
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur 63100 Pakistan
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Preparation of the chitosan/polyacrylonitrile semi-IPN hydrogel via glutaraldehyde vapors for the removal of Rhodamine B dye. Polym Bull (Berl) 2016. [DOI: 10.1007/s00289-016-1788-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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13
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Sengupta S, Banerjee S, Sinha B, Mukherjee B. Improved Skin Penetration Using In Situ Nanoparticulate Diclofenac Diethylamine in Hydrogel Systems: In Vitro and In Vivo Studies. AAPS PharmSciTech 2016; 17:307-17. [PMID: 26089167 DOI: 10.1208/s12249-015-0347-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 06/03/2015] [Indexed: 11/30/2022] Open
Abstract
Delivering diclofenac diethylamine transdermally by means of a hydrogel is an approach to reduce or avoid systemic toxicity of the drug while providing local action for a prolonged period. In the present investigation, a process was developed to produce nanosize particles (about 10 nm) of diclofenac diethylamine in situ during the development of hydrogel, using simple mixing technique. Hydrogel was developed with polyvinyl alcohol (PVA) (5.8% w/w) and carbopol 71G (1.5% w/w). The formulations were evaluated on the basis of field emission scanning electron microscopy, texture analysis, and the assessment of various physiochemical properties. Viscosity (163-165 cps for hydrogel containing microsize drug particles and 171-173 cps for hydrogel containing nanosize drug particles, respectively) and swelling index (varied between 0.62 and 0.68) data favor the hydrogels for satisfactory topical applications. The measured hardness of the different hydrogels was uniform indicating a uniform spreadability. Data of in vitro skin (cadaver) permeation for 10 h showed that the enhancement ratios of the flux of the formulation containing nanosize drug (without the permeation enhancer) were 9.72 and 1.30 compared to the formulation containing microsized drug and the marketed formulations, respectively. In vivo plasma level of the drug increased predominantly for the hydrogel containing nanosize drug-clusters. The study depicts a simple technique for preparing hydrogel containing nanosize diclofenac diethylamine particles in situ, which can be commercially viable. The study also shows the advantage of the experimental transdermal hydrogel with nanosize drug particles over the hydrogel with microsize drug particles.
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Milašinović N, Čalija B, Vidović B, Crevar Sakač M, Vujić Z, Knežević-Jugović Z. Sustained release of α-lipoic acid from chitosan microbeads synthetized by inverse emulsion method. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.10.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Trifković KT, Milašinović NZ, Djordjević VB, Krušić MTK, Knežević-Jugović ZD, Nedović VA, Bugarski BM. Chitosan microbeads for encapsulation of thyme (Thymus serpyllum L.) polyphenols. Carbohydr Polym 2014; 111:901-7. [DOI: 10.1016/j.carbpol.2014.05.053] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 05/14/2014] [Accepted: 05/16/2014] [Indexed: 10/25/2022]
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16
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Liu C, Chen Y, Chen J. Synthesis and characteristics of pH-sensitive semi-interpenetrating polymer network hydrogels based on konjac glucomannan and poly(aspartic acid) for in vitro drug delivery. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2009.08.024] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Navarro S, Shkilnyy A, Tiersch B, Taubert A, Menzel H. Preparation, characterization, and thermal gelation of amphiphilic alkyl-poly(ethyleneimine). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:10558-10566. [PMID: 19735131 DOI: 10.1021/la9013569] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Amphiphilic alkyl-poly(ethyleneimine)s (alkyl-PEI) with different degrees of polymerization have been produced by alkaline hydrolysis of alkyl-poly(2-methyl-2-oxazoline). Potentiometric titration of the alkyl-PEI shows the influence of the alkyl chain and the degree of polymerization on the titration curves and hence on the polymer conformation. Karl Fischer titration has been used to determine the water content in the polymers. Subsequent X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC) measurements prove the existence of different hydration states of the PEI even under dry storage conditions. Upon cooling from hot aqueous solutions, hydrogels form. The gelation concentration decreases with increasing degree of polymerization of the PEI segment. Scanning electron microscopy (SEM and cryo-SEM) of the hydrogels reveal an alkyl-PEI fibrous network composed of fan-like units. DSC shows that the percentages of bound and free water in the hydrogels depend on the concentration of polar amino groups.
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Affiliation(s)
- Salvador Navarro
- Institute of Technical Chemistry, Department of Macromolecular Chemistry, Braunschweig University of Technology, Hans-Sommer-Strasse 10, D-38106 Braunschweig, Germany
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18
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Polyacrylamide-gelatin polymeric networks: effect of pH and gelatin concentration on the swelling kinetics and mechanical properties. Polym Bull (Berl) 2009. [DOI: 10.1007/s00289-008-0037-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Dynamics of blood proteins adsorption onto poly (2-hydroxyethyl methacrylate)-silica nanocomposites: Correlation with biocompatibility. J Appl Polym Sci 2007. [DOI: 10.1002/app.25654] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Xu Q, Mao C, Liu NN, Zhu JJ, Sheng J. Direct electrochemistry of horseradish peroxidase based on biocompatible carboxymethyl chitosan–gold nanoparticle nanocomposite. Biosens Bioelectron 2006; 22:768-73. [PMID: 16600589 DOI: 10.1016/j.bios.2006.02.010] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2005] [Revised: 01/08/2006] [Accepted: 02/08/2006] [Indexed: 11/25/2022]
Abstract
The nanocomposite composed of carboxymethyl chitosan (CMCS) and gold nanoparticles was successfully prepared by a novel and in situ process. It was characterized by transmission electron microscopy (TEM) and Fourier transform infrared spectrophotometer (FTIR). The nanocomposite was hydrophilic even in neutral solutions, stable and inherited the properties of the AuNPs and CMCS, which make it biocompatible for enzymes immobilization. HRP, as a model enzyme, was immobilized on the silica sol-gel matrix containing the nanocomposite to construct a novel H(2)O(2) biosensor. The direct electron transfer of HRP was achieved and investigated. The biosensor exhibited a fast amperometric response (5s), a good linear response over a wide range of concentrations from 5.0 x 10(-6) to 1.4 x 10(-3)M, and a low detection limit of 4.01 x 10(-7)M. The apparent Michaelis-Menten constant (K(M)(app)) for the biosensor was 5.7 x 10(-4)M. Good stability and sensitivity were assessed for the biosensor.
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Affiliation(s)
- Qin Xu
- School of Chemistry and Chemical Engineering, Laboratory of Life Analytical Chemistry, Nanjing University, Nanjing 210093, PR China
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Novel chitosan-based pH-sensitive interpenetrating network microgels for the controlled release of cefadroxil. Carbohydr Polym 2006. [DOI: 10.1016/j.carbpol.2006.03.025] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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El-Sherbiny IM, Harding DRK, Abdel-Bary EM. Preparation and Swelling Study of a pH-Dependent Interpolymeric Hydrogel Based on Chitosan for Controlled Drug Release. INT J POLYM MATER PO 2006. [DOI: 10.1080/00914030500440245] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Effect of chitosan addition on the electrochemical behavior and crystallization of LiMn2O4 film derived from acetates-containing solution. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2006.04.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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El-Sherbiny I, Lins R, Abdel-Bary E, Harding D. Preparation, characterization, swelling and in vitro drug release behaviour of poly[N-acryloylglycine-chitosan] interpolymeric pH and thermally-responsive hydrogels. Eur Polym J 2005. [DOI: 10.1016/j.eurpolymj.2005.05.035] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Kim SJ, Yoon SG, Kim IY, Kim NG, Kim SI. Swelling Characterizations of the Interpenetrating Polymer Network Hydrogels Composed of Polymethacrylic Acid and Alginate. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2005. [DOI: 10.1081/ma-200058669] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Liu Y, Li Y, Liu S, Li J, Yao S. Monitoring the self-assembly of chitosan/glutaraldehyde/cysteamine/Au-colloid and the binding of human serum albumin with hesperidin. Biomaterials 2005; 25:5725-33. [PMID: 15147818 DOI: 10.1016/j.biomaterials.2004.01.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2003] [Accepted: 01/20/2004] [Indexed: 11/25/2022]
Abstract
A new method for monitoring, in real-time, the self-assembly of chitosan/glutaraldehyde/cysteamine (CGC) on the gold surface and the immobilization of Au-colloid on CGC membrane with piezoelectric quartz crystal impedance (PQCI) are firstly proposed. Cyclic voltammogram and electrochemical impedance spectroscopy were also use to investigate the formation of Au-colloid/CGC. The viscosity-average molecular weight of chitosan used was firstly estimated as 16.8 x 10(5) with piezoelectric quartz crystal (PQC) sensor. On the basis of the analysis of the multi-dimensional information provided by PQCI, two stages existed in chitosan drying course: the frequency shift of the first stage was controlled by viscoelastic of the liquid, while the total frequency shift was due to mass change. The cross-link ratio of glutaraldehyde with chitosan was about 0.13, while for glutaraldehyde with cysteamine was about 0.217. PQCI also showed that the Au-colloid immobilization is a first-order reaction, while the HSA immobilization is a sum of two exponential functions, e.g., adsorption and re-arrangement. The association of the immobilized HSA with the purified hesperidin was monitored, and the association constant was estimated as 3.42 ml mg(-1) by Scatchard analysis.
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Affiliation(s)
- Yingju Liu
- College of Chemistry and Chemical Engineering, Hunan University, State Key Laboratory of Chemo/Biosensing and Chemometrics, Changsha, Hunan 410082, China
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Kim SJ, Yoon SG, Kim SI. Effect of the water state on the electrical bending behavior of chitosan/poly(diallyldimethylammonium chloride) hydrogels in NaCl solutions. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/polb.10778] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Kim SJ, Yoon SG, Kim IY, Kim SI. Swelling characterization of the semiinterpenetrating polymer network hydrogels composed of chitosan and poly(diallyldimethylammonium chloride). J Appl Polym Sci 2004. [DOI: 10.1002/app.13516] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Kim SJ, Lee KJ, Kim IY, Lee YM, Kim SI. Swelling kinetics of modified poly(vinyl alcohol) hydrogels. J Appl Polym Sci 2003. [DOI: 10.1002/app.13076] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kim SJ, Yoon SG, Lee YM, An KH, Kim SI. Water sorption of poly(vinyl alcohol)/ poly(diallyldimethylammonium chloride) interpenetrating polymer network hydrogels. J Appl Polym Sci 2003. [DOI: 10.1002/app.12843] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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