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Zhu J, Pan J, Ma C, Zhang G, Liu G. Specific Ion Effects on the Enzymatic Degradation of Polymeric Marine Antibiofouling Materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11157-11166. [PMID: 31347852 DOI: 10.1021/acs.langmuir.9b01740] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is expected that the widely dispersed ions in seawater would have strong influence on the performance of polymeric marine antibiofouling materials through the modulation of enzymatic degradation of the materials. In this work, poly(ε-caprolactone)-based polyurethane and poly(triisopropylsilyl methacrylate-co-2-methylene-1,3-dioxepane) have been employed as model systems to explore the specific ion effects on the enzymatic degradation of polymeric marine antibiofouling materials. Our study demonstrates that the specific ion effects on the enzymatic degradation of the polymer films are closely correlated with the ion-specific enzymatic hydrolysis of the ester. In the presence of different cations, the effectiveness of the enzyme to degrade the polymer films is dominated by the direct specific interactions between the cations and the negatively charged enzyme molecules. In the presence of different anions, the kosmotropic anions give rise to a high enzyme activity in the degradation of polymer films induced by the salting-out effect, whereas the chaotropic anions lead to a low enzyme activity in the degradation of the polymer films owing to the salting-in effect. This work highlights the opportunities available for the use of specific ion effects to modulate the enzymatic degradation of polymeric antibiofouling materials in the marine environment.
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Affiliation(s)
- Jie Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics , University of Science and Technology of China , Hefei 230026 , P. R. China
| | - Jiansen Pan
- Faculty of Materials Science and Engineering , South China University of Technology , 510640 Guangzhou , P. R. China
| | - Chunfeng Ma
- Faculty of Materials Science and Engineering , South China University of Technology , 510640 Guangzhou , P. R. China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering , South China University of Technology , 510640 Guangzhou , P. R. China
| | - Guangming Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics , University of Science and Technology of China , Hefei 230026 , P. R. China
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2
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Real-Time Interferometric Refractive Index Change Measurement for the Direct Detection of Enzymatic Reactions and the Determination of Enzyme Kinetics. SENSORS 2019; 19:s19030539. [PMID: 30696020 PMCID: PMC6387378 DOI: 10.3390/s19030539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 01/18/2019] [Accepted: 01/22/2019] [Indexed: 12/03/2022]
Abstract
Back scatter interferometry (BSI) is a sensitive method for detecting changes in the bulk refractive index of a solution in a microfluidic system. Here we demonstrate that BSI can be used to directly detect enzymatic reactions and, for the first time, derive kinetic parameters. While many methods in biomedical assays rely on detectable biproducts to produce a signal, direct detection is possible if the substrate or the product exert distinct differences in their specific refractive index so that the total refractive index changes during the enzymatic reaction. In this study, both the conversion of glucose to glucose-6-phosphate, catalyzed by hexokinase, and the conversion of adenosine-triphosphate to adenosine di-phosphate and mono-phosphate, catalyzed by apyrase, were monitored by BSI. When adding hexokinase to glucose solutions containing adenosine-triphosphate, the conversion can be directly followed by BSI, which shows the increasing refractive index and a final plateau corresponding to the particular concentration. From the initial reaction velocities, KM was found to be 0.33 mM using Michaelis–Menten kinetics. The experiments with apyrase indicate that the refractive index also depends on the presence of various ions that must be taken into account when using this technique. This study clearly demonstrates that measuring changes in the refractive index can be used for the direct determination of substrate concentrations and enzyme kinetics.
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3
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Ganda S, Jiang Y, Thomas DS, Eliezar J, Stenzel MH. Biodegradable Glycopolymeric Micelles Obtained by RAFT-controlled Radical Ring-Opening Polymerization. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00266] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sylvia Ganda
- Centre for Advanced Macromolecular
Design, School of Chemistry, ‡NMR Facility, Mark
Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, NSW 2052, Australia
| | - Yanyan Jiang
- Centre for Advanced Macromolecular
Design, School of Chemistry, ‡NMR Facility, Mark
Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, NSW 2052, Australia
| | - Donald S. Thomas
- Centre for Advanced Macromolecular
Design, School of Chemistry, ‡NMR Facility, Mark
Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, NSW 2052, Australia
| | - Jeaniffer Eliezar
- Centre for Advanced Macromolecular
Design, School of Chemistry, ‡NMR Facility, Mark
Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, NSW 2052, Australia
| | - Martina H. Stenzel
- Centre for Advanced Macromolecular
Design, School of Chemistry, ‡NMR Facility, Mark
Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, NSW 2052, Australia
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Zhang M, Yilmaz T, Boztas AO, Karakuzu O, Bang WY, Yegin Y, Luo Z, Lenox M, Cisneros-Zevallos L, Akbulut M. A multifunctional nanoparticulate theranostic system with simultaneous chemotherapeutic, photothermal therapeutic, and MRI contrast capabilities. RSC Adv 2016. [DOI: 10.1039/c5ra27792b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Herein, a single-step, scalable approach for preparing a multifunctional, theranostic drug delivery system made out of paclitaxel, iron oxide nanoparticles, gold nanoparticles, and poly(ethylene oxide)-b-poly(ε-caprolactone) is reported.
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Affiliation(s)
- Ming Zhang
- Artie McFerrin Department of Chemical Engineering
- Texas A&M University
- College Station
- USA
| | - Turker Yilmaz
- Texas Institute of Biotechnology Education and Research
- Houston
- USA
| | - Ali Ozgur Boztas
- Texas Institute of Biotechnology Education and Research
- Houston
- USA
| | - Ozgur Karakuzu
- Texas Institute of Biotechnology Education and Research
- Houston
- USA
| | - Woo Young Bang
- Department of Horticultural Sciences
- Texas A&M University
- College Station
- USA
- National Institute of Biological Resources (NIBR)
| | - Yagmur Yegin
- Department of Nutrition and Food Science
- Texas A&M University
- USA
| | - Zhiping Luo
- Department of Chemistry and Physics
- Fayetteville State University
- Fayetteville
- USA
| | - Mark Lenox
- Texas A&M Institute for Preclinical Studies
- Texas A&M University
- College Station
- USA
| | | | - Mustafa Akbulut
- Artie McFerrin Department of Chemical Engineering
- Texas A&M University
- College Station
- USA
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5
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Chen L, Zhang J, Liu Y, Zhang H, Wang G. Synthesis, characterization, micellization and application of novel multiblock copolymers with the same compositions but different linkages. Polym Chem 2015. [DOI: 10.1039/c5py01103e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Several novel multiblock copolymers, (PEO-b-PS-b-PEO-Diyne)s, [PEO-b-PS-b-PEO-(OH)4]s and (PEO-b-PS-b-PEO-Acetal)s, with the same compositions but different linkages were constructed, and their micellization and application were studied.
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Affiliation(s)
- Lingdi Chen
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Jiaxing Zhang
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Yujie Liu
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Hongdong Zhang
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
| | - Guowei Wang
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
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Chen G, Yang J, Lu G, Liu PC, Chen Q, Xie Z, Wu C. One Stone Kills Three Birds: Novel Boron-Containing Vesicles for Potential BNCT, Controlled Drug Release, and Diagnostic Imaging. Mol Pharm 2014; 11:3291-9. [DOI: 10.1021/mp400641u] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Gaojian Chen
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
- Center
for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, P. R. China
| | - Jingying Yang
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Gang Lu
- Department
of Surgery, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Pi Chu Liu
- Department
of Surgery, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Qianjin Chen
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Zuowei Xie
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Chi Wu
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
- The
Hefei National laboratory of Physical Science at Microscale, Department
of Chemical Physics, The University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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7
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Zhu X, Fryd M, Valentine AM, Wayland BB. Corona charge selective micelle degradation catalyzed by P. cepacia lipase isoforms. Chem Commun (Camb) 2014; 50:964-7. [DOI: 10.1039/c3cc47740a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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8
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Gong X, Ngai T, Wu C. A portable, stable and precise laser differential refractometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:114103. [PMID: 24289410 DOI: 10.1063/1.4828350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this work, we present a portable laser differential refractometer with real-time detection and high precision based on the Snell's law and a 2f-2f optical design. The 2f-2f configuration solves a traditional position drifting problem of the laser beam and enhances the signal stability, where a small pinhole is illuminated by the laser light and imaged to the detector by lens placed in the middle between the detector and the pinhole. However, it also leads to a larger dimension of the instrument, limiting its applications and its sensitivity that is proportional to the optical path. Therefore, for a portable device on the basis of the 2f-2f design, a combination of a mirror and a lens was developed to minimize the optical path without affecting the 2f-2f design. Our simple and compact design reaches a resolution of 10(-6) refractive index units (RIU). Moreover, the dimension of such a modified differential refractometer is significantly reduced to be portable. Owing to its real-time detection speed and high precision, this newly developed refractometer is particularly attractive when it is used as an independent and ultra-sensitive detector in many research and industrial applications wherein there is a time-dependent concentration change, e.g., the concentration determination, quality control, and study of kinetic processes in solution, including adsorption, sedimentation, and dissolution, to name few but not limited.
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Affiliation(s)
- Xiangjun Gong
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
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9
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Zhu X, Fryd M, Wayland BB. Kinetic-mechanistic studies of lipase-polymer micelle binding and catalytic degradation: Enzyme interfacial activation. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.03.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Zhu X, Sharma VD, Fryd M, Ilies MA, Wayland BB. Enzyme and acid catalyzed degradation of PEG45-b-PBO0,6,9-b-PCL60 micelles: Increased hydrolytic stability by engineering the hydrophilic–hydrophobic interface. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.03.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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11
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Hu X, Li H, Luo S, Liu T, Jiang Y, Liu S. Thiol and pH dual-responsive dynamic covalent shell cross-linked micelles for triggered release of chemotherapeutic drugs. Polym Chem 2013. [DOI: 10.1039/c2py20701j] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Xu Y, Ma R, Zhang Z, He H, Wang Y, Qu A, An Y, Zhu X, Shi L. Complex micelles with a responsive shell for controlling of enzymatic degradation. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.05.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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13
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Kipping M, Krahl F, Döring A, Adler HJP, Kuckling D. Synthesis and characterization of particles consisting of a biodegradable poly(l-lactide) core and a functional hydrophilic shell. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2009.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Hu Y, Jiang Z, Chen R, Wu W, Jiang X. Degradation and Degradation-Induced Re-Assembly of PVP-PCL Micelles. Biomacromolecules 2010; 11:481-8. [DOI: 10.1021/bm901211r] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong Hu
- Nanjing National Laboratory of Microstructure, Department of Material Science and Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China, and Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
| | - Zhiping Jiang
- Nanjing National Laboratory of Microstructure, Department of Material Science and Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China, and Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
| | - Rui Chen
- Nanjing National Laboratory of Microstructure, Department of Material Science and Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China, and Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
| | - Wei Wu
- Nanjing National Laboratory of Microstructure, Department of Material Science and Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China, and Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
| | - Xiqun Jiang
- Nanjing National Laboratory of Microstructure, Department of Material Science and Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China, and Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
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15
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García-Valenzuela A. Beam refraction and displacement in a differential refractometer with an absorbing sample. OPTICS LETTERS 2009; 34:2192-2194. [PMID: 19823545 DOI: 10.1364/ol.34.002192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The transmission of an optical beam through the compound cell of a differential refractometer with an absorbing sample is analyzed. Formulas for the lateral shift and the deflection angle of the transmitted optical beam for a complex refractive-index difference are obtained.
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Affiliation(s)
- Augusto García-Valenzuela
- Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, México Distrito Federal, Mexico.
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16
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Hou Y, Chen J, Sun P, Gan Z, Zhang G. In situ investigations on enzymatic degradation of poly(ɛ-caprolactone). POLYMER 2007. [DOI: 10.1016/j.polymer.2007.08.054] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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