The Experts below are selected from a list of 29118 Experts worldwide ranked by ideXlab platform
Clairemarie Pradier - One of the best experts on this subject based on the ideXlab platform.
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optimized grafting of antimicrobial peptides on stainless steel surface and biofilm resistance tests
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Arnaud Hequet, Vincent Humblot, Jeanmarc Berjeaud, Clairemarie PradierAbstract:Abstract Antibacterial peptides, magainin I and nisin were covalently bound to stainless steel surfaces. Several procedures of surface functionalisation processes have been investigated and optimized, each step being characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and X-ray photoemission spectroscopy (XPS). Grafting of antibacterial peptides was successfully achieved by a 3 steps functionalisation process on a chitosan Polymeric Layer. The antibacterial activity of the anchored magainin and nisin was tested against a Gram-positive bacteria, Listeria ivanovii , i.e., the possible survival and attachment of this bacteria, was characterized on modified stainless steel surfaces. The results revealed that the adsorbed peptides reduced the adhesion of bacteria on the functionalised stainless steel surface.
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Optimized grafting of antimicrobial peptides on stainless steel surface and biofilm resistance tests
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Arnaud Hequet, Vincent Humblot, Jeanmarc Berjeaud, Clairemarie PradierAbstract:Antibacterial peptides, magainin I and nisin were covalently bound to stainless steel surfaces. Several procedures of surface functionalisation processes have been investigated and optimized, each step being characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and X-ray photoemission spectroscopy (XPS). Grafting of antibacterial peptides was successfully achieved by a 3 steps functionalisation process on a chitosan Polymeric Layer. The antibacterial activity of the anchored magainin and nisin was tested against a Gram-positive bacteria, Listeria ivanovii, i.e., the possible survival and attachment of this bacteria, was characterized on modified stainless steel surfaces. The results revealed that the adsorbed peptides reduced the adhesion of bacteria on the functionalised stainless steel surface. (C) 2011 Elsevier B.V. All rights reserved.
Arnaud Hequet - One of the best experts on this subject based on the ideXlab platform.
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optimized grafting of antimicrobial peptides on stainless steel surface and biofilm resistance tests
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Arnaud Hequet, Vincent Humblot, Jeanmarc Berjeaud, Clairemarie PradierAbstract:Abstract Antibacterial peptides, magainin I and nisin were covalently bound to stainless steel surfaces. Several procedures of surface functionalisation processes have been investigated and optimized, each step being characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and X-ray photoemission spectroscopy (XPS). Grafting of antibacterial peptides was successfully achieved by a 3 steps functionalisation process on a chitosan Polymeric Layer. The antibacterial activity of the anchored magainin and nisin was tested against a Gram-positive bacteria, Listeria ivanovii , i.e., the possible survival and attachment of this bacteria, was characterized on modified stainless steel surfaces. The results revealed that the adsorbed peptides reduced the adhesion of bacteria on the functionalised stainless steel surface.
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Optimized grafting of antimicrobial peptides on stainless steel surface and biofilm resistance tests
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Arnaud Hequet, Vincent Humblot, Jeanmarc Berjeaud, Clairemarie PradierAbstract:Antibacterial peptides, magainin I and nisin were covalently bound to stainless steel surfaces. Several procedures of surface functionalisation processes have been investigated and optimized, each step being characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and X-ray photoemission spectroscopy (XPS). Grafting of antibacterial peptides was successfully achieved by a 3 steps functionalisation process on a chitosan Polymeric Layer. The antibacterial activity of the anchored magainin and nisin was tested against a Gram-positive bacteria, Listeria ivanovii, i.e., the possible survival and attachment of this bacteria, was characterized on modified stainless steel surfaces. The results revealed that the adsorbed peptides reduced the adhesion of bacteria on the functionalised stainless steel surface. (C) 2011 Elsevier B.V. All rights reserved.
Wanqin Jin - One of the best experts on this subject based on the ideXlab platform.
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high efficiency water transport channels using the synergistic effect of a hydrophilic polymer and graphene oxide laminates
Advanced Functional Materials, 2015Co-Authors: Kang Huang, Gongping Liu, Jie Shen, Zhenyu Chu, Haoli Zhou, Wanqin JinAbstract:Graphene oxide (GO) laminates possess unprecedented fast water-transport channels. However, how to fully utilize these unique channels in order to maximize the separation properties of GO laminates remains a challenge. Here, a bio-inspired membrane that couples an ultrathin surface water-capturing Polymeric Layer (<10 nm) and GO laminates is designed. The proposed synergistic effect of highly enhanced water sorption from the Polymeric Layer and molecular channels from the GO laminates realizes fast and selective water transport through the integrated membrane. The prepared membrane exhibits highly selective water permeation with an excellent water fl ux of over 10 000 g m −2 h −1 , which exceeds the performance upper bound of state-ofthe-art membranes for butanol dehydration. This bio-inspired strategy demonstrated here opens the door to explore fast and selective channels derived from 2D or 3D materials for highly effi cient molecular separation.
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High-Efficiency Water-Transport Channels using the Synergistic Effect of a Hydrophilic Polymer and Graphene Oxide Laminates
Advanced Functional Materials, 2015Co-Authors: Kang Huang, Gongping Liu, Jie Shen, Zhenyu Chu, Haoli Zhou, Wanqin JinAbstract:Graphene oxide (GO) laminates possess unprecedented fast water-transport channels. However, how to fully utilize these unique channels in order to maximize the separation properties of GO laminates remains a challenge. Here, a bio-inspired membrane that couples an ultrathin surface water-capturing Polymeric Layer (
Feng Zhou - One of the best experts on this subject based on the ideXlab platform.
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in situ grafting hydrophilic Polymeric Layer for stable drag reduction
Langmuir, 2019Co-Authors: Chaoguo Tian, Xingwei Wang, Ying Liu, Wufang Yang, Xiaowei Pei, Feng ZhouAbstract:Developing drag reduction techniques has attracted great attention because of their need in practical applications. However, many of the proposed strategies exhibit some inevitable limitations, especially for long period of adhibition. In this work, the dynamic but stable drag reduction effect of superhydrophilic hydrogel-coated iron sphere falling freely in a cylindrical water tank was investigated. The absolute instantaneous velocities and displacements of either the hydrogel-encapsulated or unmodified iron sphere falling freely in water were monitored via a high-speed video. It was revealed that, in the range of Reynolds number from 104 to 106, the optimized hydrogel-coated iron sphere with uniform stability could reduce the resistance by up to 40%, which was mainly due to the boundary slip of water and the delayed boundary separation that resulted from the coated hydrogel. Besides, the deliberate experiments and analysis further indicated that the superhydrophilic hydrogel Layer accompanied by the emergence of the drag crisis has largely effected the distribution of flow field at the boundary around the sphere. More importantly, the drag reduction behavior based on the proposed method was thermodynamically stable and resistant to external stimulus, including fluidic oscillator and hydrodynamic pressure. The effective long-term drag reduction performance of the hydrophilic substrate can be expected, correspondingly, and also provides a novel preliminary protocol and avenues for the development of durable drag reduction technologies.
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In Situ Grafting Hydrophilic Polymeric Layer for Stable Drag Reduction
2019Co-Authors: Chaoguo Tian, Xingwei Wang, Ying Liu, Wufang Yang, Xiaowei Pei, Feng ZhouAbstract:Developing drag reduction techniques has attracted great attention because of their need in practical applications. However, many of the proposed strategies exhibit some inevitable limitations, especially for long period of adhibition. In this work, the dynamic but stable drag reduction effect of superhydrophilic hydrogel-coated iron sphere falling freely in a cylindrical water tank was investigated. The absolute instantaneous velocities and displacements of either the hydrogel-encapsulated or unmodified iron sphere falling freely in water were monitored via a high-speed video. It was revealed that, in the range of Reynolds number from 104 to 106, the optimized hydrogel-coated iron sphere with uniform stability could reduce the resistance by up to 40%, which was mainly due to the boundary slip of water and the delayed boundary separation that resulted from the coated hydrogel. Besides, the deliberate experiments and analysis further indicated that the superhydrophilic hydrogel Layer accompanied by the emergence of the drag crisis has largely effected the distribution of flow field at the boundary around the sphere. More importantly, the drag reduction behavior based on the proposed method was thermodynamically stable and resistant to external stimulus, including fluidic oscillator and hydrodynamic pressure. The effective long-term drag reduction performance of the hydrophilic substrate can be expected, correspondingly, and also provides a novel preliminary protocol and avenues for the development of durable drag reduction technologies
Vincent Humblot - One of the best experts on this subject based on the ideXlab platform.
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optimized grafting of antimicrobial peptides on stainless steel surface and biofilm resistance tests
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Arnaud Hequet, Vincent Humblot, Jeanmarc Berjeaud, Clairemarie PradierAbstract:Abstract Antibacterial peptides, magainin I and nisin were covalently bound to stainless steel surfaces. Several procedures of surface functionalisation processes have been investigated and optimized, each step being characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and X-ray photoemission spectroscopy (XPS). Grafting of antibacterial peptides was successfully achieved by a 3 steps functionalisation process on a chitosan Polymeric Layer. The antibacterial activity of the anchored magainin and nisin was tested against a Gram-positive bacteria, Listeria ivanovii , i.e., the possible survival and attachment of this bacteria, was characterized on modified stainless steel surfaces. The results revealed that the adsorbed peptides reduced the adhesion of bacteria on the functionalised stainless steel surface.
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Optimized grafting of antimicrobial peptides on stainless steel surface and biofilm resistance tests
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Arnaud Hequet, Vincent Humblot, Jeanmarc Berjeaud, Clairemarie PradierAbstract:Antibacterial peptides, magainin I and nisin were covalently bound to stainless steel surfaces. Several procedures of surface functionalisation processes have been investigated and optimized, each step being characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and X-ray photoemission spectroscopy (XPS). Grafting of antibacterial peptides was successfully achieved by a 3 steps functionalisation process on a chitosan Polymeric Layer. The antibacterial activity of the anchored magainin and nisin was tested against a Gram-positive bacteria, Listeria ivanovii, i.e., the possible survival and attachment of this bacteria, was characterized on modified stainless steel surfaces. The results revealed that the adsorbed peptides reduced the adhesion of bacteria on the functionalised stainless steel surface. (C) 2011 Elsevier B.V. All rights reserved.