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Kalutantirige FC, He J, Yao L, Cotty S, Zhou S, Smith JW, Tajkhorshid E, Schroeder CM, Moore JS, An H, Su X, Li Y, Chen Q. Beyond nothingness in the formation and functional relevance of voids in polymer films. Nat Commun 2024; 15:2852. [PMID: 38605028 PMCID: PMC11009415 DOI: 10.1038/s41467-024-46584-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 03/04/2024] [Indexed: 04/13/2024] Open
Abstract
Voids-the nothingness-broadly exist within nanomaterials and impact properties ranging from catalysis to mechanical response. However, understanding nanovoids is challenging due to lack of imaging methods with the needed penetration depth and spatial resolution. Here, we integrate electron tomography, morphometry, graph theory and coarse-grained molecular dynamics simulation to study the formation of interconnected nanovoids in polymer films and their impacts on permeance and nanomechanical behaviour. Using polyamide membranes for molecular separation as a representative system, three-dimensional electron tomography at nanometre resolution reveals nanovoid formation from coalescence of oligomers, supported by coarse-grained molecular dynamics simulations. Void analysis provides otherwise inaccessible inputs for accurate fittings of methanol permeance for polyamide membranes. Three-dimensional structural graphs accounting for the tortuous nanovoids within, measure higher apparent moduli with polyamide membranes of higher graph rigidity. Our study elucidates the significance of nanovoids beyond the nothingness, impacting the synthesis‒morphology‒function relationships of complex nanomaterials.
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Affiliation(s)
| | - Jinlong He
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Lehan Yao
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, 61801, USA
| | - Stephen Cotty
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, 61801, USA
| | - Shan Zhou
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, 61801, USA
| | - John W Smith
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, 61801, USA
| | - Emad Tajkhorshid
- Department of Biochemistry, University of Illinois, Urbana, IL, 61801, USA
- NIH Resource for Macromolecular Modelling and Visualization, Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, 61801, USA
| | - Charles M Schroeder
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, 61801, USA
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, 61801, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, 61801, USA
| | - Jeffrey S Moore
- Department of Chemistry, University of Illinois, Urbana, IL, 61801, USA
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, 61801, USA
| | - Hyosung An
- Department of Petrochemical Materials Engineering, Chonnam National University, Yeosu, Jeollanam-do, 59631, South Korea
| | - Xiao Su
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, 61801, USA
| | - Ying Li
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA.
| | - Qian Chen
- Department of Chemistry, University of Illinois, Urbana, IL, 61801, USA.
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, 61801, USA.
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, 61801, USA.
- Materials Research Laboratory, University of Illinois, Urbana, IL, 61801, USA.
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, 61801, USA.
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2
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Jung IH, Choi KH, Seo TS, An H, Park BJ. Quantification of polystyrene microsphere attachment probability at the oil‒water interface using a microfluidic platform. Heliyon 2023; 9:e16588. [PMID: 37292304 PMCID: PMC10245256 DOI: 10.1016/j.heliyon.2023.e16588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/08/2023] [Accepted: 05/22/2023] [Indexed: 06/10/2023] Open
Abstract
This study investigates the effects of interparticle interactions and wettability on the particle attachment efficacy to the oil‒water interface. Three types of PS particles with different surface functional groups were examined at varying salt concentrations and the number of particles injected into the interface. Based on the microfluidic method and the surface coverage measurement, we found that the two contributing factors significantly influenced particle attachment efficiency to the interface, while the wettability factor has a major contribution. This research contributes to the understanding of physicochemical aspects of particle assembly at fluid interfaces and can offer strategies for forming tailored structures with desired interfacial properties.
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Affiliation(s)
- In Hwan Jung
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea
| | - Kyu Hwan Choi
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea
| | - Tae Seok Seo
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea
| | - Hyosung An
- Department of Petrochemical Materials Engineering, Chonnam National University, Yeosu, Jeollanam-do, 59631, South Korea
| | - Bum Jun Park
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea
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3
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Noh W, Go Y, An H. Reduced Graphene Oxide/Polyelectrolyte Multilayers for Fast Resistive Humidity Sensing. Sensors (Basel) 2023; 23:1977. [PMID: 36850575 PMCID: PMC9965716 DOI: 10.3390/s23041977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Fast humidity sensors are of interest due to their potential application in new sensing technologies such as wearable personal healthcare and environment sensing devices. However, the realization of rapid response/recovery humidity sensors remains challenging primarily due to the sluggish adsorption/desorption of water molecules, which particularly impacts the response/recovery times. Moreover, another key factor for fast humidity sensing, namely the attainment of equal response and recovery times, has often been neglected. Herein, the layer-by-layer (LbL) assembly of a reduced graphene oxide (rGO)/polyelectrolyte is demonstrated for application in fast humidity sensors. The resulting sensors exhibit fast response and recovery times of 0.75 and 0.85 s (corresponding to times per RH range of 0.24 and 0.27 s RH-1, respectively), providing a difference of only 0.1 s (corresponding to 0.03 s RH-1). This performance exceeds that of the majority of previously reported graphene oxide (GO)- or rGO-based humidity sensors. In addition, the polyelectrolyte deposition time is shown to be key to controlling the humidity sensing kinetics. The as-developed rapid sensing system is expected to provide useful guidance for the tailorable design of fast humidity sensors.
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4
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Chen W, Zhan X, Yuan R, Pidaparthy S, Yong AXB, An H, Tang Z, Yin K, Patra A, Jeong H, Zhang C, Ta K, Riedel ZW, Stephens RM, Shoemaker DP, Yang H, Gewirth AA, Braun PV, Ertekin E, Zuo JM, Chen Q. Formation and impact of nanoscopic oriented phase domains in electrochemical crystalline electrodes. Nat Mater 2023; 22:92-99. [PMID: 36280702 DOI: 10.1038/s41563-022-01381-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
Electrochemical phase transformation in ion-insertion crystalline electrodes is accompanied by compositional and structural changes, including the microstructural development of oriented phase domains. Previous studies have identified prevailingly transformation heterogeneities associated with diffusion- or reaction-limited mechanisms. In comparison, transformation-induced domains and their microstructure resulting from the loss of symmetry elements remain unexplored, despite their general importance in alloys and ceramics. Here, we map the formation of oriented phase domains and the development of strain gradient quantitatively during the electrochemical ion-insertion process. A collocated four-dimensional scanning transmission electron microscopy and electron energy loss spectroscopy approach, coupled with data mining, enables the study. Results show that in our model system of cubic spinel MnO2 nanoparticles their phase transformation upon Mg2+ insertion leads to the formation of domains of similar chemical identity but different orientations at nanometre length scale, following the nucleation, growth and coalescence process. Electrolytes have a substantial impact on the transformation microstructure ('island' versus 'archipelago'). Further, large strain gradients build up from the development of phase domains across their boundaries with high impact on the chemical diffusion coefficient by a factor of ten or more. Our findings thus provide critical insights into the microstructure formation mechanism and its impact on the ion-insertion process, suggesting new rules of transformation structure control for energy storage materials.
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Affiliation(s)
- Wenxiang Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Xun Zhan
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Renliang Yuan
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Saran Pidaparthy
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Adrian Xiao Bin Yong
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Hyosung An
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Zhichu Tang
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Kaijun Yin
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Arghya Patra
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Heonjae Jeong
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Cheng Zhang
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA
| | - Kim Ta
- Department of Chemistry, University of Illinois, Urbana, IL, USA
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL, USA
| | - Zachary W Riedel
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Ryan M Stephens
- Shell International Exploration and Production Inc., Houston, TX, USA
| | - Daniel P Shoemaker
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Hong Yang
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA
- Department of Chemistry, University of Illinois, Urbana, IL, USA
| | - Andrew A Gewirth
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
- Department of Chemistry, University of Illinois, Urbana, IL, USA
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL, USA
| | - Paul V Braun
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL, USA
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA
- Department of Chemistry, University of Illinois, Urbana, IL, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, USA
| | - Elif Ertekin
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Jian-Min Zuo
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA.
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA.
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA.
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA.
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA.
- Department of Chemistry, University of Illinois, Urbana, IL, USA.
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, USA.
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5
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Yao L, An H, Zhou S, Kim A, Luijten E, Chen Q. Seeking regularity from irregularity: unveiling the synthesis-nanomorphology relationships of heterogeneous nanomaterials using unsupervised machine learning. Nanoscale 2022; 14:16479-16489. [PMID: 36285804 DOI: 10.1039/d2nr03712b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nanoscale morphology of functional materials determines their chemical and physical properties. However, despite increasing use of transmission electron microscopy (TEM) to directly image nanomorphology, it remains challenging to quantify the information embedded in TEM data sets, and to use nanomorphology to link synthesis and processing conditions to properties. We develop an automated, descriptor-free analysis workflow for TEM data that utilizes convolutional neural networks and unsupervised learning to quantify and classify nanomorphology, and thereby reveal synthesis-nanomorphology relationships in three different systems. While TEM records nanomorphology readily in two-dimensional (2D) images or three-dimensional (3D) tomograms, we advance the analysis of these images by identifying and applying a universal shape fingerprint function to characterize nanomorphology. After dimensionality reduction through principal component analysis, this function then serves as the input for morphology grouping through unsupervised learning. We demonstrate the wide applicability of our workflow to both 2D and 3D TEM data sets, and to both inorganic and organic nanomaterials, including tetrahedral gold nanoparticles mixed with irregularly shaped impurities, hybrid polymer-patched gold nanoprisms, and polyamide membranes with irregular and heterogeneous 3D crumple structures. In each of these systems, unsupervised nanomorphology grouping identifies both the diversity and the similarity of the nanomaterial across different synthesis conditions, revealing how synthetic parameters guide nanomorphology development. Our work opens possibilities for enhancing synthesis of nanomaterials through artificial intelligence and for understanding and controlling complex nanomorphology, both for 2D systems and in the far less explored case of 3D structures, such as those with embedded voids or hidden interfaces.
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Affiliation(s)
- Lehan Yao
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
| | - Hyosung An
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
- Department of Petrochemical Materials Engineering, Chonnam National University, Yeosu, 59631, Korea
| | - Shan Zhou
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
| | - Ahyoung Kim
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
| | - Erik Luijten
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
- Department of Chemistry, University of Illinois, Urbana, IL 61801, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL 61801, USA
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6
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Kim A, Vo T, An H, Banerjee P, Yao L, Zhou S, Kim C, Milliron DJ, Glotzer SC, Chen Q. Symmetry-breaking in patch formation on triangular gold nanoparticles by asymmetric polymer grafting. Nat Commun 2022; 13:6774. [DOI: 10.1038/s41467-022-34246-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/19/2022] [Indexed: 11/11/2022] Open
Abstract
AbstractSynthesizing patchy particles with predictive control over patch size, shape, placement and number has been highly sought-after for nanoparticle assembly research, but is fraught with challenges. Here we show that polymers can be designed to selectively adsorb onto nanoparticle surfaces already partially coated by other chains to drive the formation of patchy nanoparticles with broken symmetry. In our model system of triangular gold nanoparticles and polystyrene-b-polyacrylic acid patch, single- and double-patch nanoparticles are produced at high yield. These asymmetric single-patch nanoparticles are shown to assemble into self-limited patch‒patch connected bowties exhibiting intriguing plasmonic properties. To unveil the mechanism of symmetry-breaking patch formation, we develop a theory that accurately predicts our experimental observations at all scales—from patch patterning on nanoparticles, to the size/shape of the patches, to the particle assemblies driven by patch‒patch interactions. Both the experimental strategy and theoretical prediction extend to nanoparticles of other shapes such as octahedra and bipyramids. Our work provides an approach to leverage polymer interactions with nanoscale curved surfaces for asymmetric grafting in nanomaterials engineering.
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7
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Jang D, Heo J, Jannah F, Khazi MI, Son YJ, Noh J, An H, Park SM, Yoon DK, Kadamannil NN, Jelinek R, Kim J. Stimulus‐Responsive Tubular Conjugated Polymer 2D Nanosheets. Angew Chem Int Ed Engl 2022; 61:e202211465. [DOI: 10.1002/anie.202211465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Daewoong Jang
- Department of Chemical Engineering Hanyang University Seoul 04763 Korea
| | - Jung‐Moo Heo
- Department of Chemical Engineering Hanyang University Seoul 04763 Korea
| | - Fadilatul Jannah
- Department of Chemical Engineering Hanyang University Seoul 04763 Korea
| | | | - Young Ji Son
- Department of Chemistry Hanyang University Seoul 04763 Korea
| | - Jaegeun Noh
- Institute of Nano Science and Technology Hanyang University Seoul 04763 Korea
- Department of Chemistry Hanyang University Seoul 04763 Korea
| | - Hyosung An
- Department of Petrochemical Materials Engineering Chonnam National University Yeosu 59631 Korea
| | - Soon Mo Park
- Graduate School of Nanoscience and Technology Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea
| | - Dong Ki Yoon
- Graduate School of Nanoscience and Technology Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Korea
| | | | - Raz Jelinek
- Department of Chemistry Ben Gurion University Negev Beer Sheva 8410501 Israel
| | - Jong‐Man Kim
- Department of Chemical Engineering Hanyang University Seoul 04763 Korea
- Institute of Nano Science and Technology Hanyang University Seoul 04763 Korea
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8
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Jang D, Heo JM, Jannah F, Khazi MI, Son YJ, Noh J, An H, Park SM, Yoon DK, Kadamannil NN, Jelinek R, Kim JM. Stimulus‐responsive Tubular Conjugated Polymer 2D Nanosheets. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daewoong Jang
- Hanyang University Department of Chemical Engineering KOREA, REPUBLIC OF
| | - Jung-Moo Heo
- Hanyang University Department of Chemical Engineering KOREA, REPUBLIC OF
| | - Fadilatul Jannah
- Hanyang University Department of Chemical Engineering KOREA, REPUBLIC OF
| | | | - Young Ji Son
- Hanyang University Department of Chemistry KOREA, REPUBLIC OF
| | - Jaegeun Noh
- Hanyang University Department of Chemistry KOREA, REPUBLIC OF
| | - Hyosung An
- Chonnam National University Department of Petrochemical Materials Engineering KOREA, REPUBLIC OF
| | - Soon Mo Park
- Korea Advanced Institute of Science and Technology Graduate School of Nanoscience and Technologies KOREA, REPUBLIC OF
| | - Dong Ki Yoon
- Korea Advanced Institute of Science and Technology Department of Chemistry KOREA, REPUBLIC OF
| | | | - Raz Jelinek
- Ben-Gurion University of the Negev Department of Chemistry ISRAEL
| | - Jong-Man Kim
- Hanyang University Department of Chemical Engineering 222 Wangsimni-roSeongdong-gu 04763 Seoul KOREA, REPUBLIC OF
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9
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Park KS, Xue Z, Patel BB, An H, Kwok JJ, Kafle P, Chen Q, Shukla D, Diao Y. Chiral emergence in multistep hierarchical assembly of achiral conjugated polymers. Nat Commun 2022; 13:2738. [PMID: 35585050 PMCID: PMC9117306 DOI: 10.1038/s41467-022-30420-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 04/27/2022] [Indexed: 11/09/2022] Open
Abstract
Intimately connected to the rule of life, chirality remains a long-time fascination in biology, chemistry, physics and materials science. Chiral structures, e.g., nucleic acid and cholesteric phase developed from chiral molecules are common in nature and synthetic soft materials. While it was recently discovered that achiral but bent-core mesogens can also form chiral helices, the assembly of chiral microstructures from achiral polymers has rarely been explored. Here, we reveal chiral emergence from achiral conjugated polymers, in which hierarchical helical structures are developed through a multistep assembly pathway. Upon increasing concentration beyond a threshold volume fraction, dispersed polymer nanofibers form lyotropic liquid crystalline (LC) mesophases with complex, chiral morphologies. Combining imaging, X-ray and spectroscopy techniques with molecular simulations, we demonstrate that this structural evolution arises from torsional polymer molecules which induce multiscale helical assembly, progressing from nano- to micron scale helical structures as the solution concentration increases. This study unveils a previously unknown complex state of matter for conjugated polymers that can pave way to a field of chiral (opto)electronics. We anticipate that hierarchical chiral helical structures can profoundly impact how conjugated polymers interact with light, transport charges, and transduce signals from biomolecular interactions and even give rise to properties unimagined before.
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Affiliation(s)
- Kyung Sun Park
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Zhengyuan Xue
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Bijal B Patel
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Hyosung An
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL, 61801, USA
| | - Justin J Kwok
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL, 61801, USA
| | - Prapti Kafle
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL, 61801, USA
| | - Diwakar Shukla
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL, 61801, USA
| | - Ying Diao
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL, 61801, USA. .,Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL, 61801, USA. .,Beckman Institute, Molecular Science and Engineering, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA. .,Department of Chemistry, University of Illinois at Urbana-Champaign, 505 S. Mathews Ave., Urbana, IL, 61801, USA. .,Materials Research Laboratory, The Grainger College of Engineering, University of Illinois at Urbana-Champaign, 104 S. Goodwin Ave., Urbana, IL, 61801, USA.
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10
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Liu Z, An H, Lin S, Kraisangka J, Correa-Jaque P, Webb A, Tiwari H, Wiener H, Benza R. Clinical Variables in Predicting Survival and Hospitalization for Pulmonary Arterial Hypertension Using Harmonized Data. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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11
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An H, Smith JW, Ji B, Cotty S, Zhou S, Yao L, Kalutantirige FC, Chen W, Ou Z, Su X, Feng J, Chen Q. Mechanism and performance relevance of nanomorphogenesis in polyamide films revealed by quantitative 3D imaging and machine learning. Sci Adv 2022; 8:eabk1888. [PMID: 35196079 PMCID: PMC8865778 DOI: 10.1126/sciadv.abk1888] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
Biological morphogenesis has inspired many efficient strategies to diversify material structure and functionality using a fixed set of components. However, implementation of morphogenesis concepts to design soft nanomaterials is underexplored. Here, we study nanomorphogenesis in the form of the three-dimensional (3D) crumpling of polyamide membranes used for commercial molecular separation, through an unprecedented integration of electron tomography, reaction-diffusion theory, machine learning (ML), and liquid-phase atomic force microscopy. 3D tomograms show that the spatial arrangement of crumples scales with monomer concentrations in a form quantitatively consistent with a Turing instability. Membrane microenvironments quantified from the nanomorphologies of crumples are combined with the Spiegler-Kedem model to accurately predict methanol permeance. ML classifies vastly heterogeneous crumples into just four morphology groups, exhibiting distinct mechanical properties. Our work forges quantitative links between synthesis and performance in polymer thin films, which can be applicable to diverse soft nanomaterials.
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Affiliation(s)
- Hyosung An
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - John W. Smith
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Bingqiang Ji
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Stephen Cotty
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA
| | - Shan Zhou
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Lehan Yao
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | | | - Wenxiang Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
| | - Zihao Ou
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Xiao Su
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA
| | - Jie Feng
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, IL, USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
- Materials Research Laboratory, University of Illinois, Urbana, IL, USA
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL, USA
- Department of Chemistry, University of Illinois, Urbana, IL, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, IL, USA
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12
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Woo J, Kim JE, Im JJ, Lee J, Jeong HS, Park S, Jung SY, An H, Yoon S, Lim SM, Lee S, Ma J, Shin EY, Han YE, Kim B, Lee EH, Feng L, Chun H, Yoon BE, Kang I, Dager SR, Lyoo IK, Lee CJ. Correction: Astrocytic water channel aquaporin-4 modulates brain plasticity in both mice and humans: a potential gliogenetic mechanism underlying language-associated learning. Mol Psychiatry 2021; 26:7853. [PMID: 34305137 DOI: 10.1038/s41380-021-01185-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J Woo
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - J E Kim
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - J J Im
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Division of Functional Food Research, Korea Food Research Institute, Seongnam, Republic of Korea
| | - H S Jeong
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Park
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - S- Y Jung
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - H An
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University,145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S M Lim
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S Lee
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Ma
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E Y Shin
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - Y- E Han
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - B Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E H Lee
- Green Cross Laboratories, Yongin, Republic of Korea
| | - L Feng
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H Chun
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - B- E Yoon
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Nanobiomedical Science, Dankook University, Cheonan, Republic of Korea
| | - I Kang
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S R Dager
- Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - I K Lyoo
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea. .,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea. .,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea.
| | - C J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea. .,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea. .,KU-KIST Graduate School of Converging Science and Technology, Korea University,145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
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13
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Guilliams KP, Gupta N, Srinivasan S, Binkley MM, Ying C, Couture L, Gross J, Wallace A, McKinstry RC, Vo K, Lee JM, An H, Goyal MS. MR Imaging Differences in the Circle of Willis between Healthy Children and Adults. AJNR Am J Neuroradiol 2021; 42:2062-2069. [PMID: 34556478 PMCID: PMC8583273 DOI: 10.3174/ajnr.a7290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 07/19/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Asymmetries in the circle of Willis have been associated with several conditions, including migraines and stroke, but they may also be age-dependent. This study examined the impact of age and age-dependent changes in cerebral perfusion on circle of Willis anatomy in healthy children and adults. MATERIALS AND METHODS We performed an observational, cross-sectional study of bright and black-blood imaging of the proximal cerebral vasculature using TOF-MRA and T2 sampling perfection with application-optimized contrasts by using different flip angle evolution (T2-SPACE) imaging at the level of the circle of Willis in 23 healthy children and 43 healthy adults (4-74 years of age). We compared arterial diameters measured manually and cerebral perfusion via pseudocontinuous arterial spin-labeling between children and adults. RESULTS We found that the summed cross-sectional area of the circle of Willis is larger in children than in adults, though the effect size was smaller with T2-SPACE-based measurements than with TOF-MRA. The circle of Willis is also more symmetric in children, and nonvisualized segments occur more frequently in adults than in children. Moreover, the size and symmetry of the circle of Willis correlate with cerebral perfusion. CONCLUSIONS Our results demonstrate that the circle of Willis is different in size and symmetry in healthy children compared with adults, likely associated with developmental changes in cerebral perfusion. Further work is needed to understand why asymmetric vasculature develops in some but not all adults.
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Affiliation(s)
- K P Guilliams
- From the Department of Neurology (K.P.G., M.M.B., J.-M.L., M.S.G.)
- Department of Pediatrics (K.P.G., R.C.M.)
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - N Gupta
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - S Srinivasan
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - M M Binkley
- From the Department of Neurology (K.P.G., M.M.B., J.-M.L., M.S.G.)
| | - C Ying
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - L Couture
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - J Gross
- Division of Neuroradiology (J.G.), Midwest Radiology, St. Paul, Minnesota
| | - A Wallace
- Department of Neurointerventional Surgery (A.W.), Ascension Columbia St. Mary's Hospital, Milwaukee, Wisconsin
| | - R C McKinstry
- Department of Pediatrics (K.P.G., R.C.M.)
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - K Vo
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - J-M Lee
- From the Department of Neurology (K.P.G., M.M.B., J.-M.L., M.S.G.)
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
- Department of Biomedical Engineering (J.-M.L.)
| | - H An
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
| | - M S Goyal
- From the Department of Neurology (K.P.G., M.M.B., J.-M.L., M.S.G.)
- Mallinckrodt Institute of Radiology (K.P.G., N.G., S.S., C.Y., L.C., R.C.M., K.V., J.-M.L., H.A., M.S.G.)
- Neuroscience (M.S.G.), Washington University School of Medicine, St. Louis, Missouri
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14
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Echols IJ, An H, Yun J, Sarang KT, Oh JH, Habib T, Zhao X, Cao H, Holta DE, Radovic M, Green MJ, Lutkenhaus JL. Electronic and Optical Property Control of Polycation/MXene Layer-by-Layer Assemblies with Chemically Diverse MXenes. Langmuir 2021; 37:11338-11350. [PMID: 34523932 DOI: 10.1021/acs.langmuir.1c01904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
MXenes, 2D nanomaterials derived from ceramic MAX phases, have drawn considerable interest in a wide variety of fields including energy storage, catalysis, and sensing. There are many possible MXene compositions due to the chemical and structural diversity of parent MAX phases, which can bear different possible metal atoms "M", number of layers, and carbon or nitrogen "X" constituents. Despite the potential variety in MXene types, the bulk of MXene research focuses upon the first MXene discovered, Ti3C2T. With the recent discovery of polymer/MXene multilayer assemblies as thin films and coatings, there is a need to broaden the accessible types of multilayers by including MXenes other than Ti3C2Tz; however, it is not clear how altering the MXene type influences the resulting multilayer growth and properties. Here, we report on the first use of MXenes other than Ti3C2Tz, specifically Ti2CTz and Nb2CTz, for the layer-by-layer (LbL) assembly of polycation/MXene multilayers. By comparing these MXenes, we evaluate both how changing M (Ti vs Nb) and "n" (Ti3C2Tzvs Ti2CTz) affect the growth and properties of the resulting multilayer. Specifically, the aqueous LbL assembly of each MXene with poly(diallyldimethylammonium) into films and coatings is examined. Further, we compare the oxidative stability, optoelectronic properties (refractive index, absorption coefficient, optical conductivity, and direct and indirect optical band gaps), and the radio frequency heating response of each multilayer. We observe that MXene multilayers with higher "n" are more electrically conductive and oxidatively stable. We also demonstrate that Nb2CTz containing films have lower optical band gaps and refractive indices at the cost of lower electrical conductivities as compared to their Ti2CTz counterparts. Our work demonstrates that the properties of MXene/polycation multilayers are highly dependent on the choice of constituent MXene and that the MXene type can be altered to suit specific applications.
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Affiliation(s)
- Ian J Echols
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Hyosung An
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Junyeong Yun
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kasturi T Sarang
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Ju-Hyun Oh
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Touseef Habib
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Xiaofei Zhao
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Huaixuan Cao
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Dustin E Holta
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Miladin Radovic
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Micah J Green
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Jodie L Lutkenhaus
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
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15
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Hwang H, An H, Lee S, Byun J. LB784 Anticancer activity of Ramalin isolated from ramalina terebrata on human Squamous Cell Carcinoma in vitro and in vivo. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.07.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Kato K, Akeda K, Miyazaki S, Yamada J, Muehleman C, Miyamoto K, Asanuma YA, Asanuma K, Fujiwara T, Lenz ME, Nakazawa T, An H, Masuda K. NF-kB decoy oligodeoxynucleotide preserves disc height in a rabbit anular-puncture model and reduces pain induction in a rat xenograft-radiculopathy model. Eur Cell Mater 2021; 42:90-109. [PMID: 34284523 DOI: 10.22203/ecm.v042a07] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
While it is known that the degenerated intervertebral disc (IVD) is one of the primary reasons for low-back pain and subsequent need for medical care, there are currently no established effective methods for direct treatment. Nuclear factor-κB (NF-κB) is a transcription factor that regulates various genes' expression, among which are inflammatory cytokines, in many tissues including the IVD. NF-κB decoy is an oligodeoxynucleotide containing the NF-κB binding site that entraps NF-κB subunits, resulting in suppression of NF-κB activity. In the present preclinical study, NF-κB decoy was injected into degenerated IVDs using the rabbit anular-puncture model. In terms of distribution, NF-κB decoy persisted in the IVDs up to at least 4 weeks after injection. The remaining amount of NF-κB decoy indicated that it fit a double-exponential-decay equation. Investigation of puncture-caused degeneration of IVDs showed that NF-κB decoy injection recovered, dose-dependently, the reduced disc height that was associated with reparative cell cloning and morphological changes, as assessed through histology. Gene expression, by quantitative real-time polymerase chain reaction (qRT-PCR), showed that NF-κB decoy attenuated inflammatory gene expression, such as that of interleukin-1 and tumor necrosis factor-α, in rabbit degenerated IVDs. NF-κB decoy also reduced the pain response as seen using the "pain sensor" nude rat xenograft-radiculopathy model. This is the first report demonstrating that NF-κB decoy suppresses the inflammatory response in degenerated IVDs and restores IVD disc height loss. Therefore, the intradiscal injection of NF-κB decoy may have the potential as an effective therapeutic strategy for discogenic pain associated with degenerated IVDs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - K Masuda
- Department of Orthopedic Surgery, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093,
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Ma S, Chen S, Zhou C, An H, Su Z, Cui Y, Lin Y. P-296 Establishment of adoptive cell therapy with tumor-infiltrating lymphocytes for liver and oesophageal cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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18
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Ying XD, Wei G, An H. Sodium butyrate relieves lung ischemia-reperfusion injury by inhibiting NF-κB and JAK2/STAT3 signaling pathways. Eur Rev Med Pharmacol Sci 2021; 25:413-422. [PMID: 33506931 DOI: 10.26355/eurrev_202101_24409] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Ischemia-reperfusion (IR) is the main cause of acute lung injury (ALI) in clinical lung transplantation, extracorporeal circulation, lung sleeve resection, trauma and cardiopulmonary resuscitation. The inflammatory response and oxidative stress following IR are factors that cause and aggravate its secondary damage. The purpose of this study was to investigate the efficacy and mechanism of sodium butyrate (NaB) on lung ischemia-reperfusion injury (LIRI). MATERIALS AND METHODS We used male C57BL/6 mice to construct the LIRI model and administered the mice with NaB. By examining the expression of inflammatory factors and oxidative stress-related molecules in mouse lung tissue, we investigated the effects of NaB on inflammation and oxidative stress in lung tissue after IR. In addition, the changes in the activity of the NF-κB and JAK2/STAT3 signaling pathways were also examined to determine the mechanism of NaB. RESULTS The expression levels of the inflammatory factors (IL-1β, IL-6 and TNF-α) in lung tissue of mice after IR were significantly increased, while NaB reduced the expression of inflammatory factors. In addition, the oxidative stress level of mouse lung tissue after IR increased significantly, showing the decrease of antioxidant molecules SOD1/2, catalase (CAT), and Peroxiredoxin 1 (Prdx1), while the intake of NaB increased the antioxidant level of mouse lung tissue. The activities of NF-κB and JAK2/STAT3 signaling pathways were significantly increased in lung tissue after IR, whereas NaB inhibited the activity of NF-κB and JAK2/STAT3 signaling pathways. CONCLUSIONS NaB relieves LIRI by inhibiting NF-κB and JAK2/STAT3 signaling pathways to reduce inflammation and oxidative stress levels in lung tissue of mice after IR.
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Affiliation(s)
- X-D Ying
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China.
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Kofina V, An H, Rawal SY. Iatrogenic acid-induced gingival recession during crown cementation: A case report. Aust Dent J 2021; 66:332-336. [PMID: 33438220 DOI: 10.1111/adj.12820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2021] [Indexed: 11/30/2022]
Abstract
Accidental contact of various chemicals in dentistry may cause damage to the gingiva. A male patient presented for a full mouth rehabilitation with ceramic crowns. The patient underwent the steps of ceramic crown preparation uneventfully. At the time of crown delivery, cotton rolls were placed in several vestibular areas for isolation. They were regularly changed during different steps of etching and cementation process, which included the use of Multilink Primer B (Ivoclar Vivadent™). On removal of the cotton roll in the area of upper right canine, the gingival tissues appeared blanched and grayish white. The cotton roll was found to have absorbed some etching material in it. As the patient was asymptomatic, he was dismissed. Two weeks later, the patient presented with inflammation and gingival recession in the same area. Initially, he was treated palliatively, and subsequently, he received a connective tissue graft on the upper right canine. This case report showed that acid etching material used during the prosthodontic cementation may have caused a gingival recession, which was successfully treated with tunnel flap and connective tissue graft. Optimal isolation of the operative field should be performed to avoid this problem.
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Affiliation(s)
- V Kofina
- Marquette University School of Dentistry, Milwaukee, WI, USA
| | - H An
- Marquette University School of Dentistry, Milwaukee, WI, USA
| | - S Y Rawal
- Marquette University School of Dentistry, Milwaukee, WI, USA
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20
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Koksal N, An H, Fidan B. Backstepping-based adaptive control of a quadrotor UAV with guaranteed tracking performance. ISA Trans 2020; 105:98-110. [PMID: 32591252 DOI: 10.1016/j.isatra.2020.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/08/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
In this paper, a backstepping based indirect adaptive control design and an alternative direct adaptive control scheme, both with guaranteed transient and steady-state tracking performances, are proposed for trajectory tracking of a quadrotor unmanned aerial vehicle (UAV). Backstepping techniques, combined with a prescribed performance function based error transformation, are employed in both designs to achieve the bounded transient and steady-state tracking errors of the strict-feedback position system which comprises both lateral position and altitude dynamics. The effects of parametric inertia and drag uncertainties on attitude regulation are compensated using a least squares based parameter identification algorithm in the indirect adaptive control design, and using a constructive Lyapunov analysis approach in the direct adaptive control scheme. The stability of the closed-loop system for both designs is proven via Lyapunov analysis. Simulation and experimental test results are provided to verify the effectiveness of the proposed control designs.
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Affiliation(s)
- N Koksal
- The Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
| | - H An
- Space Control and Inertial Technology Research Center, Harbin Institute of Technology, Harbin, 150001, PR China.
| | - B Fidan
- The Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
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21
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Kawaguchi K, Manaka D, Konishi S, Ota T, Ikeda Y, Kudo R, An H, Sasaki N, Hamasu S, Nishitai R, Mori Y, Inamoto N, Shibamoto K, Ogata A, Yamaoka T, Himoto Y. P-145 CT-based texture analysis using radiomics for hepatic sinusoidal obstruction syndrome (HSOS) in colorectal cancer patients treated with oxaliplatin containing chemotherapy. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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22
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Konishi S, Manaka D, Kawaguchi K, Ota T, Ikeda Y, Kudo R, An H, Sasaki N, Hamasu S, Nishitai R, Mori Y, Inamoto N, Shibamoto K, Ogata A, Yamaoka T, Himoto Y. SO-15 Radiomic signature for prediction of peritoneal disseminations in gastric cancer which were not detected by routine CT examinations. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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23
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Suh† S, Kim G, Jeoung S, An H. 1105 A Randomized Controlled Trial of a Psychological Intervention for Decreasing Bedtime Procrastination: The BED-PRO Study. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.1100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Bedtime Procrastination (BP) is defined as the behavior of going to bed later than intended, without having external reasons for doing so. Previous studies have shown that BP has a negative effect on sleep and health, and there is a need to develop interventions to decrease BP. This study (BED-PRO) is an ongoing study evaluating a behavioral intervention to reduce BP.
Methods
Fifteen participants who scored higher than 33 on the Bedtime Procrastination Scale were randomized to either the treatment (TRT, n=6) or control group (CTRL, n=9). Treatment consisted of four face-to-face individual sessions. All participants completed self-report questionnaires on Bedtime Procrastination Scale (BPS), Epworth Sleepiness Scale (ESS), Positive Affect and Negative Affect Schedule (K-PANAS-R) and completed the 7-day sleep diary. Data was analyzed using two-way mixed Measures Analysis of Variance (ANOVA).
Results
Mean age of the participants was 21.78 (±1.8) years and 80% (n=12) were females. Group by time interactions from repeated measures analyses revealed significant post intervention improvements in the TRT group compared to the CTRL group on all bedtime procrastination duration and scores, sleep efficiency, refreshment after waking, daytime sleepiness and negative affect of K-PANAS-R. Specifically, bedtime procrastination duration in the TRT group measured by sleep diaries decreased significantly from 75.30 (±58.57) min to 14.83 (±7.83) min, while the CTRL group did not change from 57.60 (±32.01) to 54.36 (±40.82) min (p=0.019). In addition, the TRT group reported significant improvements in bedtime procrastination scores from 36.00 (±4.05) to 22.50 (±6.72).
Conclusion
Based on results, the behavioral intervention used in this study looks promising in improving bedtime procrastination and sleep.
Support
This work was supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea(NRF-2018S1A5A8026807)
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Affiliation(s)
- S Suh†
- SUNGSHIN WOMEN’S UNIVERSITY, SEOUL, KOREA, REPUBLIC OF
| | - G Kim
- SUNGSHIN WOMEN’S UNIVERSITY, SEOUL, KOREA, REPUBLIC OF
| | - S Jeoung
- SUNGSHIN WOMEN’S UNIVERSITY, SEOUL, KOREA, REPUBLIC OF
| | - H An
- SUNGSHIN WOMEN’S UNIVERSITY, SEOUL, KOREA, REPUBLIC OF
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Li XY, Zhuang AW, Sun SW, An H. [Research on the characteristics of the formation and inheritance of Lei's medicine in Quzhou from the perspective of regional medicine]. Zhonghua Yi Shi Za Zhi 2020; 50:83-87. [PMID: 32536102 DOI: 10.3760/cma.j.cn112155-20190705-00063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Lei's medicine is the main school of traditional Chinese medicine in Quzhou, Zhejiang Province. It originated from Xin'an medical school. It has been passed on for more than 200 years, but it is still lack of in-depth study. From the perspective of regional medicine, combined with the regional characteristics of Quzhou, absorbing the research results of local social history and environmental history, starting with the historical materials such as Lei's medical works, local chronicles literature and so on, the school characteristics are summarized as: the formation of "treatment in accordance with three types of disease causes" , the academic inheritance of "inheriting the past and integrating the present" , the inheritance mode of "multiple integration" , the cultural connotation of "combining medicine with Confucianism" , and the school characteristics of "integration and innovation" . The purpose of this paper is to provide reference for the research of academic schools and the inheritance of traditional Chinese medicine.
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Affiliation(s)
- X Y Li
- Institute of Traditional Chinese Medicine Literature and Information, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou 310007, China; Institute of Traditional Chinese Medicine Literature and Information, Tongde Hospital of Zhejiang Province, Hangzhou 310012, China
| | - A W Zhuang
- Institute of Traditional Chinese Medicine Literature and Information, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou 310007, China; Institute of Traditional Chinese Medicine Literature and Information, Tongde Hospital of Zhejiang Province, Hangzhou 310012, China
| | - S W Sun
- Institute of Traditional Chinese Medicine Literature and Information, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou 310007, China; Institute of Traditional Chinese Medicine Literature and Information, Tongde Hospital of Zhejiang Province, Hangzhou 310012, China
| | - H An
- Institute of Traditional Chinese Medicine Literature and Information, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou 310007, China; Institute of Traditional Chinese Medicine Literature and Information, Tongde Hospital of Zhejiang Province, Hangzhou 310012, China
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25
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Zuo S, Wang K, Li JH, An H, Guo XC, Wang X. [Evaluation of inferior mesenteric vessel and ureter by contrast-enhanced abdominal pelvic CT and its clinical influence on laparoscopic rectal surgery]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 23:294-299. [PMID: 32192310 DOI: 10.3760/cma.j.cn.441530-20190417-00171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To assess the anatomic relationship of inferior mesenteric artery (IMA)/inferior mesenteric vein (IMV) with ureter by contrast-enhanced abdominal pelvic CT, in order to provide guidance for vascular management and ureteral protection in laparoscopic rectal surgery. Methods: A retrospective cohort study was conducted. Image data of contrast-enhanced abdominal pelvic CT at Department of Medical Radiography of Peking University First Hospital in November 2018 were enrolled. Exclusion criteria: (1) previous history of abdominal or pelvic surgery; (2) scoliosis deformities; (3) missing images; (4) minors; (5) inferior mesenteric vascular disease or tumor involvement resulting in suboptimal imaging; (6) poor image quality. Finally, contrast-enhanced abdominal pelvic CT data of 249 cases were collected, including 120 males and 129 females with mean age of (60.1±13.4) years. Multi-planar reconstruction (MPR) and maximum intensity projection (MIP) were used to evaluate the anatomic relationship of IMA/IMV with ureter. IMA root location, IMA length, branch types of IMA, distance between major branches, distance between IMA/IMV and ureter at the level of root of IMA, left colic artery (LCA) root, abdominal aortic bifurcation, and sacral promontory were measured and association between IMA/IMV and ureter site was summarized. Results: The distance from IMA root to the aortic bifurcation and sacral promontory was (42.0±8.5) mm and (101.8±14.0) mm, respectively. The length of IMA was (38.5±10.7) mm. The proportion of IMA roots locating at levels of the 2nd, 3rd, and 4th lumbar vertebra was 3.2% (8/249), 79.5% (198/249), and 17.3% (43/249), respectively. The higher the level of the lumbar vertebra, the longer the IMA [length of IMA originating from the 2nd, 3rd, 4th lumbar vertebra level: (42.4±10.9) mm, (39.5±10.4) mm, (33.0±10.9) mm, respectively; F=7.48, P<0.001]. In 111 cases (44.6%), LCA arose independently from IMA (type 1), and the distance between LCA and the first branch of sigmoid artery (SA) was (15.0±7.4) mm; in 56 cases (22.5%), LCA and SA had a common trunk (type 2), with a length of (11.0±8.5) mm; in 78 cases (31.3%), LCA branched with SA at the same point (type 3); LCA was absent in 4 cases (1.6%)(type 4). The length of IMA in LCA-deficient type 4 was (54.8±18.0) mm, which was longer than (38.2±10.5) mm in LCA-presence type (type 1, type 2 and type 3) and the difference was statistically significant (t=-3.11, P=0.002). The distance between the ureter and IMA was the longest at the level of IMA root [(35.7±8.1) mm], was the shortest at the level of the aortic bifurcation [(22.4±6.4) mm], and the distance between the ureter and IMA in different planes was significantly different (F=185.70, P<0.001). The distance between the ureter and IMV was the longest at the level of the sacral promontory [(21.1±9.0) mm], was the shortest at the level of LCA root [(12.0±5.7) mm], whose difference was also statistically significant (F=87.66, P<0.001). Conclusions: CT post-processing techniques including MPR and MIP can efficiently and accurately assess the branch types of IMA and anatomical relationship between IMA/IMV and ureter, and provide insights into laparoscopic rectal surgery for surgeons. IMA/IMV and ureter depart farthest at the level of IMA root. Artery first and plane second strategy in the middle approach of laparoscopic rectal surgery is considerable and feasible.
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Affiliation(s)
- S Zuo
- Department of General Surgery, Peking University First Hospital, Beijing 100034, China
| | - K Wang
- Department of Medical Radiography, Peking University First Hospital, Beijing 100034, China
| | - J H Li
- Department of Medical Radiography, Peking University First Hospital, Beijing 100034, China
| | - H An
- Department of General Surgery, Peking University First Hospital, Beijing 100034, China
| | - X C Guo
- Department of Medical Radiography, Peking University First Hospital, Beijing 100034, China
| | - X Wang
- Department of General Surgery, Peking University First Hospital, Beijing 100034, China
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Smith JW, Jiang X, An H, Barclay AM, Licari G, Tajkhorshid E, Moore EG, Rienstra CM, Moore JS, Chen Q. Polymer-Peptide Conjugates Convert Amyloid into Protein Nanobundles through Fragmentation and Lateral Association. ACS Appl Nano Mater 2020; 3:937-945. [PMID: 32149271 PMCID: PMC7059651 DOI: 10.1021/acsanm.9b01331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The assembly of proteins into amyloid fibrils has become linked not only with the progression of myriad human diseases, but also important biological functions. Understanding and controlling the formation, structure, and stability of amyloid fibrils is therefore a major scientific goal. Here we utilize electron microscopy-based approaches combined with quantitative statistical analysis to show how recently developed kind of amyloid modulators-multivalent polymer-peptide conjugates (mPPCs)-can be applied to control the structure and stability of amyloid fibrils. In doing so, we demonstrate that mPPCs are able to convert 40-residue amyloid beta fibrils into ordered nanostructures through a combination of fragmentation and bundling. Fragmentation is shown to be consistent with a model where the rate constant of fibril breakage is independent of the fibril length, suggesting a local and specific interaction between fibrils and mPPCs. Subsequent bundling, which was previously not observed, leads to the formation of sheet-like nanostructures which are surprisingly much more uniform than the starting fibrils. These nanostructures have dimensions independent of the molecular weight of the mPPC and retain the molecular-level ordering of the starting amyloid fibrils. Collectively, we reveal quantitative and nanoscopic understanding of how mPPCs can be applied to control amyloid structure and stability, and demonstrate approaches to elucidate nanoscale amyloid phase behavior in the presence of functional macromolecules and other modulators.
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Affiliation(s)
- John W. Smith
- Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Xing Jiang
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801, United States
| | - Hyosung An
- Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, United States
| | - Alexander M. Barclay
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Giuseppe Licari
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801, United States
| | - Emad Tajkhorshid
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Department of Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Edwin G. Moore
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Chad M. Rienstra
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Corresponding Authors: , ,
| | - Jeffrey S. Moore
- Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Corresponding Authors: , ,
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Corresponding Authors: , ,
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Lin Y, Yin H, An H, Zhou C, Zhou L, Chen S, McGowan E. Chemokine receptor CCR2b expressing anti-Tn-MUC1 CAR-T cells enhanced anti-breast cancer activity. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz448.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lin Y, Chen S, Zhong S, An H, Yin H, McGowan E. Phase I clinical trial of PD-1 knockout anti-MUC1 CAR-T cells in the treatment of patients with non-small cell lung cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz448] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yang YP, Yang S, An H, Liu XP, An N, Guo QW, Ao YF. [Surgical technique and mid-and-long curative effect analysis of primary repair of chronic Achilles tendon rupture]. Zhonghua Wai Ke Za Zhi 2019; 57:57-62. [PMID: 31510734 DOI: 10.3760/cma.j.issn.0529-5815.2019.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To examine the surgical method and clinical outcome of primary repair of chronic Achilles tendon rupture. Methods: From March 2012 to August 2017, clinical data of 35 consecutive patients with chronic Achilles tendon rupture who were treated with primary repair by the same doctor at Department of Sports Medicine, Peking University Third Hospital were retrospectively analyzed.There were 29 males and 6 females with age of (41.0±9.3)years(range:29-65 years), the follow-up period was (45.6±17.2) months(range:17-82 months). All the patients had unilateral tendon rupture with 22 cases on the left and 13 cases on the right.The preoperative and postoperative Visual Analogue Scale(VAS), American Orthopaedic Foot and Ankle Society Ankle-Hindfoot Score(AOFAS), the Victorian Institute of Sport Assessment-Achilles(VISA-A), the Achilles tendon Total Rupture Score(ATRS)and the Tegner Activity Score of patients were collected and compared by paired-t test. Results: Among 47 patients with chronic Achilles tendon rupture, 35 patients were followed up for (45.6 ± 17.2)months(range: 17-28 months). No serious postoperative complications such as infection or nerve damage and rerupture outcomes were reported. At the last follow-up,the VAS decreased from 1.0(2.0) (M(Q(R))) preoperative to 0.0(0.8)(Z=-3.586, P=0.00), AOFAS increased from 64.3±12.5 to 97.0±5.0(t=-14.359,P<0.001), VISA-A increased from 51.3± 9.8 to 87.8±18.0(t=- 17.656, P=0.00), Tegner increased from 0.9±0.3 to 4.6±1.7(t=- 12.524, P=0.00)and ATRS increased from 40.0±3.5 to 97.9±3.9(t=-64.133,P=0.00). Twenty-eight patients (80.0%) had returned to their preinjury activity levels, and 7 patients (20.0%) no longer participate in recreational sports. According to Arner-Lindholm curative effect evaluation criteria, 32 cases(91.4%)gained the excellent results, 1 case(2.9%) of good and 2 cases(5.7%) bad, and the percentage of the cases with the excellent or good results was 94.3%. All except 2 patients with bad results could perform a single-limb heel rise painlessly. Conclusions: Primary repair is an efficient approach for chronic Achilles tendon rupture. The mid-and-long curative effect is satisfactory and stable.Compared with other surgical techniques, operation is relatively simple and economical. The primary repair is considerably safe, with few serious complications such as infection or nerve damage and reruptures.
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Affiliation(s)
- Y P Yang
- Department of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
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Hwang J, An H, Yoon S, Park K. P14.27 The significance of multicentric noncontrast-enhancing lesions distant from surgically resected glioblastoma: Case series of 3 patients. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Glioblastoma is the most malignant primary brain tumor. The tumor location and multiplicity plays an important role in surgical and further treatment. The incidence of multiple lesions at the time of diagnosis was known as 1–20%, which showed a poor prognostic factor. Most researches has focused on multiple contrast-enhancing lesions, however, multicentric non-enhancing lesions distant from glioblastoma has been rarely evaluated. The authors reported the case series of the patient who showed multicentric non contrast-enhancing lesions without connection to histologically-proven glioblastoma.
MATERIAL AND METHODS
Multicentric non contrast-enhancing lesions were defined as areas of FLAIR hyperintensity and mass effect without post-contrast enhancement, separated from the histologically-proven glioblastoma in a newly diagnosed disease. Three patients who showed distant non-enhancing lesions with appearance of a multicentric low-grade glioma were included in this study. The typical enhancing lesions were surgically resected and standard chemo-radiotherapy was followed in all patients.
RESULTS
All patients were male and their age was 38, 60 and 65 years old respectively. Multicentric tumor location was as follows: Case 1, left frontal lobe with non-enhancing lesion in left parahippocampal gyrus; Case 2, left parietal with non-enhancing lesion in left anteromedial temporal lobe; Case 3, left thalamus with non-enhancing lesions in both basal frontal and right temporal lobe. Pathologically, the resected enhancing tumor revealed glioblastoma in 2 patients and diffuse midline glioma in 1. All tumors were IDH-wild type. The resected enhanced lesion showed no progression but all non-enhancing lesions developed contrast-enhancing tumors at 3, 13 and 17 months after initial treatment, with high tracer uptake on 18FDG-PET or 18FDOPA-PET. Despite multidisciplinary treatment, two patients died from disease progression at 30 and 32 months after diagnosis and one patient is still alive with overall survival of 15 months.
CONCLUSION
The appearance of multicentric non-enhancing lesions distant from a typically enhancing tumor showed an uncommon finding in glioblastoma and poor prognostic features. These lesions progress faster than expected for a low-grade glioma. These lesions should be distinguished from typical low-grade glioma and should be considered more advanced lesions than their appearances suggest.
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Affiliation(s)
- J Hwang
- Dept of Neurosurgery, Kyungpook National University Hospital, Daegu, Korea, Republic of
| | - H An
- Dept of Neurosurgery, Kyungpook National University Hospital, Daegu, Korea, Republic of
| | - S Yoon
- Dept of Neurosurgery, Kyungpook National University Hospital, Daegu, Korea, Republic of
| | - K Park
- Dept of Neurosurgery, Kyungpook National University Chilgok Hospital, Daegu, Korea, Republic of
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Chen W, Zhan X, Luo B, Ou Z, Shih PC, Yao L, Pidaparthy S, Patra A, An H, Braun PV, Stephens RM, Yang H, Zuo JM, Chen Q. Effects of Particle Size on Mg 2+ Ion Intercalation into λ-MnO 2 Cathode Materials. Nano Lett 2019; 19:4712-4720. [PMID: 31251071 DOI: 10.1021/acs.nanolett.9b01780] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
An emergent theme in mono- and multivalent ion batteries is to utilize nanoparticles (NPs) as electrode materials based on the phenomenological observations that their short ion diffusion length and large electrode-electrolyte interface can lead to improved ion insertion kinetics compared to their bulk counterparts. However, the understanding of how the NP size fundamentally relates to their electrochemical behaviors (e.g., charge storage mechanism, phase transition associated with ion insertion) is still primitive. Here, we employ spinel λ-MnO2 particles as a model cathode material, which have effective Mg2+ ion intercalation but with their size effect poorly understood to investigate their operating mechanism via a suite of electrochemical and structural characterizations. We prepare two differently sized samples, the small nanoscopic λ-MnO2 particles (81 ± 25 nm) and big micron-sized ones (814 ± 207 nm) via postsynthesis size-selection. Analysis of the charge storage mechanisms shows that the stored charge from Mg2+ ion intercalation dominates in both systems and is ∼10 times higher in small particles than that in the big ones. From both X-ray diffraction and atomic-resolution scanning transmission electron microscopy imaging, we reveal a fundamental difference in phase transition of the differently sized particles during Mg2+ ion intercalation: the small NPs undergo a solid-solution-like phase transition which minimizes lattice mismatch and energy penalty for accommodating new phases, whereas the big particles follow conventional multiphase transformation. We show that this pathway difference is related to the improved electrochemical performance (e.g., rate capability, cycling performance) of small particles over the big ones which provides important insights in encoding within the particle dimension, that is, the single-phase transition pathway in high-performance electrode materials for multivalent ion batteries.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Ryan M Stephens
- Shell International Exploration and Production Inc. , Houston , Texas 77082 , United States
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Yan J, Yu XJ, Pei XY, Zhang JF, Wu XM, Li X, An H, Bai J. [Contamination and pathogenicity analysis of listeria monocytogenes in restaurant in Heilongjiang Province]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:298-302. [PMID: 30841671 DOI: 10.3760/cma.j.issn.0253-9624.2019.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the contamination, serotype, pulsed field gel electrophoresis (PFGE) and drug resistance of listeria monocytogenes (L.monocytogenes) in the process of restaurant kitchens in Heilongjiang Province. Methods: Seventeen typical restaurants were selected from three cities in Heilongjiang Province in 2016, and 590 kitchen samples were collected and tested according to the national standard method. The serotype, pulsed field gel electrophoresis (PFGE) and drug resistance of isolated strains were analyzed. Results: L. monocytogenes was found in 104 of 590 of the samples analysed (17.63%). The isolates belong to six serotypes (1/2 a, 1/2 b, 1/2c, 3a, 3 b, 4 b) and self-condensing bacteria, and 57.38% (70 strains) of the strains belong to serotype 1/2b. Two highly pathogenic serotype 4b was detected for human listeria disease. The results of PFGE analysis show that the bacteria have cross-contamination in the environment, tools, equipment, food and personnel. The drug resistance results showed that 2 strains were resistant to tetracycline, 1 strain was resistant to erythromycin, 13 strains were intermediate to tetracycline, and 2 strains were resistant to tetracycline and erythromycin. Conclusion: There is a certain degree of L. monocytogenes cross-contamination in the catering kitchen in Heilongjiang Province. And an important serotype 4b that can cause human Listeria disease was detected.
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Affiliation(s)
- J Yan
- Institute for Communicable Disease Control and Prevention, Heilongjiang Provincial Center for Disease Prevention and Control, Harbin 150030, China
| | - X J Yu
- Institute for Communicable Disease Control and Prevention, Heilongjiang Provincial Center for Disease Prevention and Control, Harbin 150030, China
| | - X Y Pei
- Division Ⅰ of Risk Surveillance, China National Center for Food Safety Risk assessment, Beijing 100022, China
| | - J F Zhang
- Institute for Communicable Disease Control and Prevention, Heilongjiang Provincial Center for Disease Prevention and Control, Harbin 150030, China
| | - X M Wu
- Institute for Communicable Disease Control and Prevention, Jiamusi Center for Disease Prevention and Control, Jiamusi 154000, China
| | - X Li
- Institute for Communicable Disease Control and Prevention, Heilongjiang Provincial Center for Disease Prevention and Control, Harbin 150030, China
| | - H An
- Institute for Communicable Disease Control and Prevention, Heilongjiang Provincial Center for Disease Prevention and Control, Harbin 150030, China
| | - J Bai
- Institute for Communicable Disease Control and Prevention, Heilongjiang Provincial Center for Disease Prevention and Control, Harbin 150030, China
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Song X, Smith JW, Kim J, Zaluzec NJ, Chen W, An H, Dennison JM, Cahill DG, Kulzick MA, Chen Q. Unraveling the Morphology-Function Relationships of Polyamide Membranes Using Quantitative Electron Tomography. ACS Appl Mater Interfaces 2019; 11:8517-8526. [PMID: 30676014 DOI: 10.1021/acsami.8b20826] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
An understanding of how complex nanoscale morphologies emerge from synthesis would offer powerful strategies to construct soft materials with designed structures and functions. However, these kinds of morphologies have proven difficult to characterize, and therefore manipulate, because they are three-dimensional (3D), nanoscopic, and often highly irregular. Here, we studied polyamide (PA) membranes used in wastewater reclamation as a prime example of this challenge. Using electron tomography and quantitative morphometry, we reconstructed the nanoscale morphology of 3D crumples and voids in PA membranes for the first time. Various parameters governing film transport properties, such as surface-to-volume ratio and mass-per-area, were measured directly from the reconstructed membrane structure. In addition, we extracted information inaccessible by other means. For example, 3D reconstruction shows that membrane nanostructures are formed from PA layers 15-20 nm thick folding into 3D crumples which envelope up to 30% void by volume. Mapping local curvature and thickness in 3D quantitatively groups these crumples into three classes, "domes", "dimples", and "clusters", each being a distinct type of microenvironment. Elemental mapping of metal ion adsorption across the film demonstrates that these previously missed parameters are relevant to membrane performance. This imaging-morphometry platform can be applicable to other nanoscale soft materials and potentially suggests engineering strategies based directly on synthesis-morphology-function relationships.
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Affiliation(s)
| | | | | | - Nestor J Zaluzec
- Photon Sciences Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | | | | | | | | | - Matthew A Kulzick
- BP Corporate Research Center , Naperville , Illinois 60563 , United States
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Chen S, Lin Y, Zhong S, An H, Lu Y, Yin M, Liang W, McGowan E. Anti-MUC1 CAR-T cells combined with PD-1 knockout engineered T cells for patients with non-small cell lung cancer (NSCLC): A pilot study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy485.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Lee HA, Cho EY, Kim TH, Lee Y, Suh SJ, Jung YK, Kim JH, An H, Seo YS, Kim DS, Yim HJ, Yeon JE, Byun KS, Um SH. Risk Factors for Dropout From the Liver Transplant Waiting List of Hepatocellular Carcinoma Patients Under Locoregional Treatment. Transplant Proc 2018; 50:3521-3526. [PMID: 30577230 DOI: 10.1016/j.transproceed.2018.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 08/29/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND In new organ allocation policy, patients with hepatocellular carcinoma (HCC) experience a 6-month delay in being granted Model for End-Stage Liver Disease exception points. However, it may not be fair for patients at risk of early progression of HCC. METHODS All patients who were diagnosed as United Network for Organ Sharing (UNOS) stage 1 or 2 of HCC between January 2004 and December 2012 were included. Patients who received surgical resection or liver transplant (LT) as a primary treatment and who did not receive any treatment for HCC were excluded. Patients with baseline Model for End-Stage Liver Disease score ≥22 were also excluded because they have a higher chance of receiving LT. Patients who developed extrahepatic progression within 1 year were considered as high-risk for early recurrence after LT. RESULTS A total of 586 patients were included. Mean (SD) age was 59.9 (10.3) years and 409 patients (69.8%) were men. The cumulative incidence of estimated dropout was 8.9% at 6 months; size of the maximum nodule (≥3 cm) and nonachievement of complete response were independent factors. Extrahepatic progression developed in 16 patients (2.7%) within 1 year; size of the maximum nodule (4 cm) and alpha-fetoprotein level (>100 ng/mL) were independent predictors. CONCLUSIONS The estimated dropout rate from the waiting list within 6 months was 8.9%. Advantage points might be needed for patients with maximum nodule size ≥3 cm or those with noncomplete response. However, in patients with maximum nodule size ≥4 cm or alpha-fetoprotein level >100 ng/mL, caution is needed.
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Affiliation(s)
- H A Lee
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - E Y Cho
- Department of Biostatistics, Korea University College of Medicine, Seoul, Korea
| | - T H Kim
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Y Lee
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - S J Suh
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Y K Jung
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - J H Kim
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - H An
- Department of Biostatistics, Korea University College of Medicine, Seoul, Korea
| | - Y S Seo
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
| | - D-S Kim
- Department of Surgery, Korea University College of Medicine, Seoul, Korea
| | - H J Yim
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
| | - J E Yeon
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - K S Byun
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - S H Um
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
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Kim K, An H, Lee S, Seo J, Lim J. LB1597 Palmitoyl-KVK-L-ascorbic acid inhibits melanogenesis in B16F1 cells through the down-regulation of tyrosinase and MITF. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.06.136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Chiu KWH, Lam KO, An H, Cheung GTC, Lau JKS, Choy TS, Lee VHF. Long-term outcomes and recurrence pattern of 18F-FDG PET-CT complete metabolic response in the first-line treatment of metastatic colorectal cancer: a lesion-based and patient-based analysis. BMC Cancer 2018; 18:776. [PMID: 30064385 PMCID: PMC6069713 DOI: 10.1186/s12885-018-4687-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/22/2018] [Indexed: 12/22/2022] Open
Abstract
Background 18F-FDG PET-CT is commonly used to monitor treatment response in patients with metastatic colorectal cancer (mCRC). With improvement in systemic therapy, complete metabolic response (CMR) is increasingly encountered but its clinical significance is undefined. The study examined the long-term outcomes and recurrence patterns in these patients. Methods Consecutive patients with mCRC who achieved CMR on PET-CT during first-line systemic therapy were retrospectively analysed. Measurable and non-measurable lesions identified on baseline PET-CT were compared with Response Criteria in Solid Tumors (RECIST) on CT on a per-lesion basis. Progression free (PFS) and Overall Survival (OS) were compared with clinical parameters and treatment characteristics on a per-patient basis. Results Between 2008 and 2011, 40 patients with 192 serial PET-CT scans were eligible for analysis involving 44 measurable and 38 non-measurable lesions in 59 metastatic sites. On a per-lesion basis, 46% also achieved Complete Response (CR) on RECIST criteria and sustained CMR was more frequent in these lesions (OR 1.727, p = 0.0031). Progressive metabolic disease (PMD) was seen in 12% of lesions, with liver metastasis the most common. Receiver operating characteristics (ROC) curve analysis revealed the optimal value of SUVmax for predicting PMD of a lesion was 4.4 (AUC 0.734, p = 0.004). On a per-patient basis, 14 patients achieved sustained CMR and their outcomes were better than those with PMD (median OS not reached vs 37.7 months p = 0.0001). No statistical difference was seen in OS between patients who achieved PR or CR (median OS 51.4 vs 44.2 months p = 0.766). Conclusion Our results provided additional information of long-term outcomes and recurrence patterns of patients with mCRC after achieving CMR. They had improved survival and sustained CMR using systemic therapy alone is possible. Discordance between morphological and metabolic response was consistent with reported literature but in the presence of CMR the two groups had comparable outcomes.
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Affiliation(s)
- Keith W H Chiu
- Department of Diagnostic Radiology, LKS Faculty of Medicine, The University of Hong Kong, 102, Pokfulam Raod, Hong Kong, China
| | - Ka-On Lam
- Department of Clinical Oncology, LKS Faculty of Medicine, The University of Hong Kong, 1/F Professorial Block, 102, Pokfulam Raod, Hong Kong, China. .,Clinical Oncology Center, The University of Hong Kong-Shenzhen Hospital, 102, Pokfulam Raod, Hong Kong, China.
| | - H An
- Department of Diagnostic Radiology, LKS Faculty of Medicine, The University of Hong Kong, 102, Pokfulam Raod, Hong Kong, China
| | - Gavin T C Cheung
- Department of Clinical Oncology, Queen Elizabeth Hospital, 30 Gascoigne Raod, Hong Kong, China
| | - Johnny K S Lau
- Department of Clinical Oncology, Queen Mary Hospital, 1/F Professorial Block, 102, Pokfulam Raod, Hong Kong, China
| | - Tim-Shing Choy
- Department of Clinical Oncology, Queen Mary Hospital, 1/F Professorial Block, 102, Pokfulam Raod, Hong Kong, China
| | - Victor H F Lee
- Department of Clinical Oncology, LKS Faculty of Medicine, The University of Hong Kong, 1/F Professorial Block, 102, Pokfulam Raod, Hong Kong, China.,Clinical Oncology Center, The University of Hong Kong-Shenzhen Hospital, 102, Pokfulam Raod, Hong Kong, China
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An H, Lee E, Chiu K, Chang C. The emerging roles of functional imaging in ovarian cancer with peritoneal carcinomatosis. Clin Radiol 2018; 73:597-609. [DOI: 10.1016/j.crad.2018.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 03/09/2018] [Indexed: 12/22/2022]
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Manaka D, Nishitai R, Konishi S, Ota T, Nishikawa Y, Kudo R, Kawaguchi K, An H, Hamasu S. Analysis of clinical outcomes of two antiEGFR antibodies, cetuximab and panitumumab, in the 1st line chemotherapy of RAS wild metastatic colorectal cancer, by neutrophil-to-lymphocyte ratio (NLR) kinetics. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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40
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Konishi S, Manaka D, An H, Nishikawa Y, Ota T, Kudo R, Kawaguchi K, Hamasu S, Nishitai R. Early outcomes of a pilot study of neoadjuvant chemotherapy with S-1 plus oxaliplatin at dose of 130mg/m2 (nacG-SOX130) in stage III gastric cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Kawaguchi K, Nishitai R, Manaka D, Ota T, Nishikawa Y, Kudo R, An H, Hamasu S, Konishi S. A phase II study of dose-escalation of regorafenib for patients with previously treated metastatic colorectal cancer – DEREGULATE study - Trial in progress. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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42
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Byun J, An H, Yeom S, Choi G. 127 NDRG1 regulates proliferation of endothelial cells of infantile hemangioma. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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43
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Woo J, Kim JE, Im JJ, Lee J, Jeong HS, Park S, Jung SY, An H, Yoon S, Lim SM, Lee S, Ma J, Shin EY, Han YE, Kim B, Lee EH, Feng L, Chun H, Yoon BE, Kang I, Dager SR, Lyoo IK, Lee CJ. Astrocytic water channel aquaporin-4 modulates brain plasticity in both mice and humans: a potential gliogenetic mechanism underlying language-associated learning. Mol Psychiatry 2018; 23:1021-1030. [PMID: 29565042 DOI: 10.1038/mp.2017.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 03/21/2017] [Accepted: 04/17/2017] [Indexed: 01/04/2023]
Abstract
The role of astrocytes in brain plasticity has not been extensively studied compared with that of neurons. Here we adopted integrative translational and reverse-translational approaches to explore the role of an astrocyte-specific major water channel in the brain, aquaporin-4 (AQP4), in brain plasticity and learning. We initially identified the most prevalent genetic variant of AQP4 (single nucleotide polymorphism of rs162008 with C or T variation, which has a minor allele frequency of 0.21) from a human database (n=60 706) and examined its functionality in modulating the expression level of AQP4 in an in vitro luciferase reporter assay. In the following experiments, AQP4 knock-down in mice not only impaired hippocampal volumetric plasticity after exposure to enriched environment but also caused loss of long-term potentiation after theta-burst stimulation. In humans, there was a cross-sectional association of rs162008 with gray matter (GM) volume variation in cortices, including the vicinity of the Perisylvian heteromodal language area (Sample 1, n=650). GM volume variation in these brain regions was positively associated with the semantic verbal fluency. In a prospective follow-up study (Sample 2, n=45), the effects of an intensive 5-week foreign language (English) learning experience on regional GM volume increase were modulated by this AQP4 variant, which was also associated with verbal learning capacity change. We then delineated in mice mechanisms that included AQP4-dependent transient astrocytic volume changes and astrocytic structural elaboration. We believe our study provides the first integrative evidence for a gliogenetic basis that involves AQP4, underlying language-associated brain plasticity.
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Affiliation(s)
- J Woo
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - J E Kim
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - J J Im
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H S Jeong
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Park
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - S-Y Jung
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - H An
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S M Lim
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S Lee
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Ma
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E Y Shin
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - Y-E Han
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - B Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E H Lee
- Green Cross Laboratories, Yongin, Republic of Korea
| | - L Feng
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H Chun
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - B-E Yoon
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Nanobiomedical Science, Dankook University, Cheonan, Republic of Korea
| | - I Kang
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S R Dager
- Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - I K Lyoo
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea
| | - C J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea.,KU-KIST, Graduate School of Convergence Technology, Korea University, Seoul, Republic of Korea
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An H, Habib T, Shah S, Gao H, Radovic M, Green MJ, Lutkenhaus JL. Surface-agnostic highly stretchable and bendable conductive MXene multilayers. Sci Adv 2018; 4:eaaq0118. [PMID: 29536044 PMCID: PMC5844711 DOI: 10.1126/sciadv.aaq0118] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 02/01/2018] [Indexed: 05/18/2023]
Abstract
Stretchable, bendable, and foldable conductive coatings are crucial for wearable electronics and biometric sensors. These coatings should maintain functionality while simultaneously interfacing with different types of surfaces undergoing mechanical deformation. MXene sheets as conductive two-dimensional nanomaterials are promising for this purpose, but it is still extremely difficult to form surface-agnostic MXene coatings that can withstand extreme mechanical deformation. We report on conductive and conformal MXene multilayer coatings that can undergo large-scale mechanical deformation while maintaining a conductivity as high as 2000 S/m. MXene multilayers are successfully deposited onto flexible polymer sheets, stretchable poly(dimethylsiloxane), nylon fiber, glass, and silicon. The coating shows a recoverable resistance response to bending (up to 2.5-mm bending radius) and stretching (up to 40% tensile strain), which was leveraged for detecting human motion and topographical scanning. We anticipate that this discovery will allow for the implementation of MXene-based coatings onto mechanically deformable objects.
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Affiliation(s)
- Hyosung An
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Touseef Habib
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Smit Shah
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Huili Gao
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Miladin Radovic
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
- Corresponding author. (M.R.); (M.J.G.); (J.L.L.)
| | - Micah J. Green
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
- Corresponding author. (M.R.); (M.J.G.); (J.L.L.)
| | - Jodie L. Lutkenhaus
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
- Corresponding author. (M.R.); (M.J.G.); (J.L.L.)
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45
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Suarez-Martinez PC, Robinson J, An H, Nahas RC, Cinoman D, Lutkenhaus JL. Polymer-clay nanocomposite coatings as efficient, environment-friendly surface pretreatments for aluminum alloy 2024-T3. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.11.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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46
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Chalker CJ, An H, Zavala J, Parija A, Banerjee S, Lutkenhaus JL, Batteas JD. Fabrication and Electrochemical Performance of Structured Mesoscale Open Shell V 2O 5 Networks. Langmuir 2017; 33:5975-5981. [PMID: 28494587 DOI: 10.1021/acs.langmuir.6b04163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Crystalline vanadium pentoxide (V2O5) has attracted significant interest as a potential cathode material for energy storage applications due to its high theoretical capacity. Unfortunately, the material suffers from low conductivity as well as slow lithium ion diffusion, both of which affect how fast the electrode can be charged/discharged and how many times it can be cycled. Colloidal crystal templating (CCT) provides a simple approach to create well-organized 3-D nanostructures of materials, resulting in a significant increase in surface area that can lead to marked improvements in electrochemical performance. Here, a single layer of open shell V2O5 architectures ca. 1 μm in height with ca. 100 nm wall thickness was fabricated using CCT, and the electrochemical properties of these assemblies were evaluated. A decrease in polarization effects, resulting from the higher surface area mesostructured features, was found to produce significantly enhanced electrochemical performance. The discharge capacity of an unpatterned thin film of V2O5 (∼8.1 μAh/cm2) was found to increase to ∼10.2 μAh/cm2 when the material was patterned by CCT, affording enhanced charge storage capabilities as well as a decrease in the irreversible degradation during charge-discharge cycling. This work demonstrates the importance of creating mesoscale electrode surfaces for improving the performance of energy storage devices and provides fundamental understanding of the means to improve device performance.
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Affiliation(s)
- Cody J Chalker
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Hyosung An
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Jose Zavala
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Abhishek Parija
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Sarbajit Banerjee
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Jodie L Lutkenhaus
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - James D Batteas
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
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Qiang Y, Xu J, Yan C, Jin H, Xiao T, Yan N, Zhou L, An H, Zhou X, Shao Q, Xia S. Butyrate and retinoic acid imprint mucosal-like dendritic cell development synergistically from bone marrow cells. Clin Exp Immunol 2017; 189:290-297. [PMID: 28542882 DOI: 10.1111/cei.12990] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2017] [Indexed: 12/27/2022] Open
Abstract
Accumulating data show that the phenotypes and functions of distinctive mucosal dendritic cells (DCs) in the gut are regulated by retinoic acid (RA). Unfortunately, the exact role of butyrate in RA-mediated mucosal DC differentiation has not been elucidated thoroughly to date. Mucosal-like dendritic cell differentiation was completed in vitro by culturing bone marrow cells with growth factors [granulocyte-macrophage colony-stimulating factor (GM-CSF/interleukin (IL)-4], RA and/or butyrate. The phenotypes, cytokine secretion, immune functions and levels of retinal dehydrogenase of different DCs were detected using quantitative polymerase chain reaction (qPCR), enzyme-linked immunosorbent assay (ELISA) and flow cytometry, respectively. The results showed that RA-induced DCs (RA-DCs) showed mucosal DC properties, including expression of CD103 and gut homing receptor α4 β7 , low proinflammatory cytokine secretion and low priming capability to antigen-specific CD4+ T cells. Butyrate-treated RA-DCs (Bu-RA-DCs) decreased CD11c, but increased CD103 and α4 β7 expression. Moreover, the CD4+ T priming capability and the levels of retinal dehydrogenase of RA-DCs were suppressed significantly by butyrate. Thus, butyrate and retinoic acid have different but synergistic regulatory functions on mucosal DC differentiation, indicating that immune homeostasis in the gut depends largely upon RA and butyrate to imprint different mucosal DC subsets, both individually and collectively.
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Affiliation(s)
- Y Qiang
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Department of Clinical Laboratory, the Second People's Hospital of Changzhou Affiliated to Nanjing Medical University, Changzhou, Jiangsu, China
| | - J Xu
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - C Yan
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - H Jin
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - T Xiao
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - N Yan
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - L Zhou
- Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - H An
- Cancer Institute, Institute of Translational Medicine, Second Military Medical University, Shanghai, China
| | - X Zhou
- Department of Pathology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Q Shao
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - S Xia
- Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.,Institute of Clinic Laboratory Diagnosis, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
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Choi Y, Jiang F, An H, Park HJ, Choi JH, Lee H. A pharmacogenomic study on the pharmacokinetics of tacrolimus in healthy subjects using the DMETTM Plus platform. Pharmacogenomics J 2016; 17:105-106. [PMID: 27958377 DOI: 10.1038/tpj.2016.85] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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An H, Li X, Chalker C, Stracke M, Verduzco R, Lutkenhaus JL. Conducting Block Copolymer Binders for Carbon-Free Hybrid Vanadium Pentoxide Cathodes with Enhanced Performance. ACS Appl Mater Interfaces 2016; 8:28585-28591. [PMID: 27676130 DOI: 10.1021/acsami.6b08028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Polymeric binders are essential to battery electrodes, mechanically stabilizing the active materials. Most often, these binders are insulating, and conductive carbons must be added to the electrode structure. Conductive polymer binders, those that transport both ions and electrons, are of primary interest because they potentially eliminate the need for carbon additives. However, it is challenging to incorporate both ion- and electron-conductive polymeric binders into electrode systems because of differences in physical affinities among the two polymer types and the electroactive material. Here, we investigate amphiphilic polymeric binders comprised of electron- and ion-conducting poly(3-hexylthiophene)-block-poly(ethylene oxide) (P3HT-b-PEO) as compared to P3HT, PEO, and a blend of P3HT/PEO homopolymers in carbon-free V2O5 cathodes. The electrode with P3HT-b-PEO binder has the highest capacity of 190 mAh/g, whereas V2O5 is only 77 mAh/g at a C rate of 0.1 after over 200 cycles: a 2.5-fold improvement. Similarly P3HT, PEO, and the blend have capacities of 139, 130, and 70 mAh/g, which are not nearly as impressive as the block copolymer binder. The unique architecture of P3HT-b-PEO, wherein P3HT and PEO blocks are covalently bonded, promotes the uniform distribution of conductive binders within the V2O5 structure, whereas the analogous P3HT/PEO blend suffers from phase separation. This work demonstrates that conductive block copolymer binders enable carbon-free electrodes for lithium-ion battery systems.
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Affiliation(s)
- Hyosung An
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Xiaoyi Li
- Department of Chemical and Biomolecular Engineering, Rice University , Houston, Texas 77005, United States
| | - Cody Chalker
- Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States
| | - Maria Stracke
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Rafael Verduzco
- Department of Chemical and Biomolecular Engineering, Rice University , Houston, Texas 77005, United States
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Jodie L Lutkenhaus
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
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50
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Ayensa M, An H, Gómez-Guillén M, Montero P, Borderías A. Partial protease activity characterization of squid (Todaropsis eblanae) mantle / Caracterización parcial de la actividad proteolítica del manto de pota (Todaropsis eblanae). FOOD SCI TECHNOL INT 2016. [DOI: 10.1177/108201329900500504] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Proteolytic activity in mantle of Todaropsis eblanae was maximum at 40 and 65 °C. Several peaks of activity were detected over the pH range studied (1.5-9.5), indicating the presence of acidic, neutral and alkaline proteases, depending on the temperature. The substantial enzymic inhibition at acidic pH by the inhibitor trans-epoxysuccinyl-L-leucylamine-4-guanidine butane (E-64) revealed the pre dominance of lysosomal cysteine proteases (cathepsins) which showed higher activity at 65 °C than at 40 °C. At 65 °C and pH 5.5 metallo-proteases were also detected by the inhibition with phenanthroline. Serine protease activity predominated at neutral pH (higher at 40 °C than at 65 °C), and cysteine proteases were detected at alkaline pH. There was evidence of cathepsin B and L activity at 65 °C and to a lesser degree at 40 °C.
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Affiliation(s)
- M.G. Ayensa
- Instituto del Frío (CSIC) Ciudad Universitaria s/n, 28040 Madrid, Spain
| | - H. An
- Oregon State University-Seafood Laboratory, 2001 Marine Dr, RM 253, Astoria, OR 97103-3427, USA
| | | | - P. Montero
- Instituto del Frío (CSIC) Ciudad Universitaria s/n, 28040 Madrid, Spain
| | - A.J. Borderías
- Instituto del Frío (CSIC) Ciudad Universitaria s/n, 28040 Madrid, Spain
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