51
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Prediction of the primary particle size distribution in vinyl chloride polymerization. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19900350112] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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52
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In vivo evidence of oral vaccination with PLGA nanoparticles containing the immunostimulant monophosphoryl lipid A. Biomaterials 2011; 32:4052-7. [PMID: 21377204 DOI: 10.1016/j.biomaterials.2011.02.011] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
Abstract
Although oral vaccination has numerous advantages over the commonly used parenteral route, degradation of vaccine and its low uptake in the lymphoid tissue of the gastrointestinal (GI) tract still impede their development. In this study, the model antigen ovalbumin (OVA) and the immunostimulant monophosphoryl lipid A (MPLA) were incorporated in polymeric nanoparticles based on poly(D,L-lactide-co-glycolide) (PLGA). These polymeric carriers were orally administered to BALB/c mice (Bagg albino, inbred strain of mouse) and the resulting time-dependent systemic and mucosal immune responses towards OVA were assessed by measuring the OVA-specific IgG and IgA titers using an enzyme-linked immunosorbent assay (ELISA). PLGA nanoparticles were spherical in shape, around 320 nm in size, negatively charged (around -20 mV) and had an OVA and MPLA payload of 9.6% and 0.86%, respectively. A single immunization with formulation containing (OVA + MPLA) incorporated in PLGA nanoparticles induced a stronger IgG immune response than that induced by OVA in PBS solution or OVA incorporated into PLGA nanoparticles. Moreover, significantly higher IgA titers were generated by administration of (OVA + MPLA)/PLGA nanoparticles compared to IgA stimulated by control formulations, proving the capability of inducing a mucosal immunity. These findings demonstrate that co-delivery of OVA and MPLA in PLGA nanoparticles promotes both systemic and mucosal immune responses and represents therefore a suitable strategy for oral vaccination.
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53
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Nanocarrier Aided Nasal Vaccination: An Experimental and Computational Approach. Ind Eng Chem Res 2011. [DOI: 10.1021/ie100307t] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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54
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From Molecular to Plant-Scale Modeling of Polymerization Processes: A Digital High-Pressure Low-Density Polyethylene Production Paradigm. Chem Eng Technol 2010. [DOI: 10.1002/ceat.201000325] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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55
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A combined metabolic/polymerization kinetic model on the microbial production of poly(3-hydroxybutyrate). N Biotechnol 2010; 27:358-67. [DOI: 10.1016/j.nbt.2010.02.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Revised: 12/07/2009] [Accepted: 02/02/2010] [Indexed: 11/27/2022]
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56
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Synthesis and characterization of cross-linked chitosan microspheres for drug delivery applications. J Microencapsul 2010. [DOI: 10.3109/02652040309178076] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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57
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Synthesis and release studies of shikonin-containing microcapsules prepared by the solvent evaporation method. J Microencapsul 2010. [DOI: 10.3109/02652040309178348] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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58
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A Novel Stochastic Approach for the Prediction of the Exact Topological Characteristics and Rheological Properties of Highly-Branched Polymer Chains. Macromolecules 2010. [DOI: 10.1021/ma1005233] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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59
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Modeling and simulation of an industrial slurry-phase catalytic olefin polymerization reactor series. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2010.02.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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60
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Synthesis of Composite Polystyrene/Silica Nanoparticles via Precipitation and Emulsion Polymerization Methods. MACROMOL REACT ENG 2010. [DOI: 10.1002/mren.200900054] [Citation(s) in RCA: 5] [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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61
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Development of Advanced Software Tools for Computer-Aided Design, Simulation, and Optimization of Polymerization Processes. MACROMOL REACT ENG 2010. [DOI: 10.1002/mren.200900053] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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62
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Sensitivity of the fermentative poly-β-hydroxybutyrate (PHB) production by Alcaligenes latus against operating and environmental conditions. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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63
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On the synthesis and rebinding properties of [Co(C2H3O2)2(z-Histidine)] imprinted polymers prepared by precipitation polymerization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.11.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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64
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65
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Macromol. React. Eng. 1/2009. MACROMOL REACT ENG 2009. [DOI: 10.1002/mren.200990000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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66
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67
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68
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Effect of Reaction Conditions and Catalyst Design on the Rheological Properties of Polyolefins Produced in Gas-Phase Olefin Polymerization Reactors. MACROMOL THEOR SIMUL 2008. [DOI: 10.1002/mats.200800047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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69
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Development of a multi-scale, multi-phase, multi-zone dynamic model for the prediction of particle segregation in catalytic olefin polymerization FBRs. Chem Eng Sci 2008. [DOI: 10.1016/j.ces.2007.08.069] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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70
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Dynamic evolution of the particle size distribution in suspension polymerization reactors: A comparative study on Monte Carlo and sectional grid methods. CAN J CHEM ENG 2008. [DOI: 10.1002/cjce.20091] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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71
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Dynamic prediction of the bivariate molecular weight–copolymer composition distribution using sectional-grid and stochastic numerical methods. Chem Eng Sci 2008. [DOI: 10.1016/j.ces.2008.05.047] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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72
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Gas-Phase Olefin Polymerization in the Presence of Supported and Self-Supported Ziegler-Natta Catalysts. MACROMOL REACT ENG 2008. [DOI: 10.1002/mren.200700050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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73
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On the Production of Polyolefins with Bimodal Molecular Weight and Copolymer Composition Distributions in Catalytic Gas-Phase Fluidized-Bed Reactors. MACROMOL THEOR SIMUL 2007. [DOI: 10.1002/mats.200700033] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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74
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Solution of the bivariate dynamic population balance equation in batch particulate systems: Combined aggregation and breakage. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2007.01.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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75
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Monte Carlo simulation for the solution of the bi-variate dynamic population balance equation in batch particulate systems. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2006.11.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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76
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Prediction of the Bivariate Molecular Weight-Long Chain Branching Distribution in High-Pressure Low-Density Polyethylene Autoclaves. MACROMOL THEOR SIMUL 2007. [DOI: 10.1002/mats.200700005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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77
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Prediction of the Bivariate Molecular Weight - Long Chain Branching Distribution in Highly Branched Polymerization Systems Using Monte Carlo and Sectional Grid Methods. Macromolecules 2007. [DOI: 10.1021/ma0623439] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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78
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Evaluation of the Internal Particle Morphology in Catalytic Gas-Phase Olefin Polymerization Reactors. Ind Eng Chem Res 2007. [DOI: 10.1021/ie060721s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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79
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Dynamic Optimization of Molecular Weight Distribution Using Orthogonal Collocation on Finite Elements and Fixed Pivot Methods: An Experimental and Theoretical Investigation. MACROMOL REACT ENG 2007. [DOI: 10.1002/mren.200600015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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80
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An Experimental and Theoretical Investigation into the Diffusion of Olefins in Semi-Crystalline Polymers: The Influence of Swelling in Polymer-Penetrant Systems. MACROMOL REACT ENG 2007. [DOI: 10.1002/mren.200600014] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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81
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Part IV: Dynamic evolution of the particle size distribution in particulate processes. A comparative study between Monte Carlo and the generalized method of moments. Chem Eng Sci 2006. [DOI: 10.1016/j.ces.2006.05.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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82
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Prediction of Solubility of α-Olefins in Polyolefins Using a Combined Equation of StateMolecular Dynamics Approach. Ind Eng Chem Res 2006. [DOI: 10.1021/ie060137j] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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83
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Assessment of Particle Agglomeration in Catalytic Olefin Polymerization Reactors Using Rheological Measurements. Ind Eng Chem Res 2006. [DOI: 10.1021/ie051105j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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84
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Dynamic optimization of molecular weight distribution using orthogonal collocation on finite elements and fixed pivot methods: An experimental and theoretical investigation. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s1570-7946(06)80232-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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85
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A generalized population balance model for the prediction of particle size distribution in suspension polymerization reactors. Chem Eng Sci 2006. [DOI: 10.1016/j.ces.2005.07.013] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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86
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Part III: Dynamic evolution of the particle size distribution in batch and continuous particulate processes: A Galerkin on finite elements approach. Chem Eng Sci 2005. [DOI: 10.1016/j.ces.2005.06.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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87
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88
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OPTIMISATION OF GRADE TRANSITIONS IN AN INDUSTRIAL GAS-PHASE OLEFIN POLYMERIZATION FLUIDIZED BED REACTOR VIA NCO TRACKING. ACTA ACUST UNITED AC 2005. [DOI: 10.3182/20050703-6-cz-1902.01581] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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89
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Mathematical Modeling of Free-Radical Ethylene Copolymerization in High-Pressure Tubular Reactors. Ind Eng Chem Res 2004. [DOI: 10.1021/ie049596f] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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90
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Part I: Dynamic evolution of the particle size distribution in particulate processes undergoing combined particle growth and aggregation. Chem Eng Sci 2004. [DOI: 10.1016/j.ces.2004.06.021] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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91
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92
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A Comprehensive Kinetic Model for the Free-Radical Polymerization of Vinyl Chloride in the Presence of Monofunctional and Bifunctional Initiators. Ind Eng Chem Res 2004. [DOI: 10.1021/ie0498908] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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93
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Comprehensive Analysis of Single-Particle Growth in Heterogeneous Olefin Polymerization: The Random-Pore Polymeric Flow Model. Ind Eng Chem Res 2004. [DOI: 10.1021/ie030810u] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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94
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Challenges in Polymerization Reactor Modeling and Optimization: A Population Balance Perspective. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/s1474-6670(17)31805-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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95
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A Comprehensive Experimental Investigation of the Methyl Methacrylate/Butyl Acrylate/Acrylic Acid Emulsion Terpolymerization. ACTA ACUST UNITED AC 2003. [DOI: 10.1081/pre-120026375] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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96
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Synthesis and release studies of shikonin-containing microcapsules prepared by the solvent evaporation method. J Microencapsul 2003; 20:581-96. [PMID: 12909543 DOI: 10.1080/0265204031000148031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Microcapsules, containing the pharmaceutical substance shikonin, were prepared by the solvent evaporation method in order to enhance shikonin stability (reduce photo-oxidation, polymerization), decrease its hydrophobicity and control its release rate. The effect of various parameters, such as type of polymer, type and concentration of surfactant, solvent volume and mastic gum (Pistacia lentiscus resin) content/concentration as core additive, on the characteristics of the produced microcapsules and the release rate of shikonin, were experimentally investigated. Among the polymers tested for matrix, ethylcellulose (EC) of viscosity 10 cp was the most successful; EC 100 cp and mastic gum result in larger/compact particles with no pores and much slower release. Sodium dodecyl sulphate (SDS) results in microcapsules with desirable morphological and physicochemical characteristics, while polyethylene glycol (PEG) and polyvinyl alcohol (PVA) are not indicated as surfactants in shikonin microencapsulation. Decreasing the solvent volume (dichloromethane) results in increased mean particle size and, thus, in slower release rate of shikonin, while the incorporation of mastic gum in the capsule core results in better control of shikonin release. Finally, the combination of EC 10 cp as matrix, mastic gum as core additive, low dichloromethane (DCM) volume and low SDS concentration results in microcapsules with the best characteristics in terms of efficiency, loading, release and particle size distribution.
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97
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Optimal grade transition and selection of closed-loop controllers in a gas-phase olefin polymerization fluidized bed reactor. Chem Eng Sci 2003. [DOI: 10.1016/s0009-2509(03)00223-9] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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98
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A Comprehensive Kinetic Model for the Combined Chemical and Thermal Polymerization of Styrene up to High Conversions. MACROMOL CHEM PHYS 2003. [DOI: 10.1002/macp.200390104] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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99
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Evaluation of the morphological and release characteristics of coated fertilizer granules produced in a Wurster fluidized bed. POWDER TECHNOL 2003. [DOI: 10.1016/s0032-5910(02)00345-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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100
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Synthesis and characterization of cross-linked chitosan microspheres for drug delivery applications. J Microencapsul 2003; 20:375-85. [PMID: 12881117 DOI: 10.1080/0265204031000093078] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
Abstract
The present study deals with the synthesis and characterization of cross-linked chitosan microspheres containing an hydrophilic drug, hydroquinone. The microspheres were prepared by the suspension cross-linking method using glutaraldehyde as the cross-linking agent of the polymer matrix. Perfectly spherical cross-linked hydrogel microspheres loaded with hydroquinone were obtained in the size range of 20-100 microm. The effect of the degree of polymer cross-linking, chitosan molecular weight, chitosan concentration and amount of the encapsulated drug on the hydroquinone release kinetics was extensively investigated. It was found that slower drug release rates were obtained from microspheres prepared by using a higher initial concentration of chitosan, a higher molecular weight of chitosan or/and a lower drug concentration. Most importantly, it was shown that the release rate of hydroquinone was mainly controlled by the polymer cross-linking density and, thus, by the degree of swelling of the hydrogel matrix.
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