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Zhang Q, Dong J, Zhou C, Zhang D, Yuan S, Kramer D, Xue D, Peng C. Machine learning for data-driven design of high-safety lithium metal anode. STAR Protoc 2024; 5:102834. [PMID: 38198281 PMCID: PMC10820802 DOI: 10.1016/j.xpro.2023.102834] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/17/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
Here, we present a protocol for developing an inorganic-organic hybrid interphase layer using the self-assembled monolayers technique to enhance the surface of the lithium metal anode. We describe steps for extracting organic molecules from open-sourced databases and calculating their microscopic properties. We then detail procedures for developing a machine learning model for predicting the ionic diffusion barrier and preparing the inputs for prediction. This protocol enables a cost-effective workflow to identify promising self-assembled monolayers with exceptional performance. For complete details on the use and execution of this protocol, please refer to Zhang et al. (2023).1.
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Affiliation(s)
- Qi Zhang
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Junlin Dong
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuan Zhou
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Dantong Zhang
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Shuguang Yuan
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Denis Kramer
- Engineering Sciences, University of Southampton, SO17 1BJ Southampton, UK; Helmut-Schmidt-University, University of the Armed Forces, 22043 Hamburg, Germany
| | - Dongfeng Xue
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Chao Peng
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
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2
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Zhang D, Zhang Q, Peng C, Long Z, Zhuang G, Kramer D, Komarneni S, Zhi C, Xue D. Recent advances in developing multiscale descriptor approach for the design of oxygen redox electrocatalysts. iScience 2023; 26:106624. [PMID: 37138778 PMCID: PMC10149376 DOI: 10.1016/j.isci.2023.106624] [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] [Indexed: 05/05/2023] Open
Abstract
Oxygen redox electrocatalysis is the crucial electrode reaction among new-era energy sources. The prerequisite to rationally design an ideal electrocatalyst is accurately identifying the structure-activity relationship based on the so-called descriptors which link the catalytic performance with structural properties. However, the quick discovery of those descriptors remains challenging. In recent, the high-throughput computing and machine learning methods were identified to present great prospects for accelerating the screening of descriptors. That new research paradigm improves cognition in the way of oxygen evolution reaction/oxygen reduction reaction activity descriptor and reinforces the understanding of intrinsic physical and chemical features in the electrocatalytic process from a multiscale perspective. This review summarizes those new research paradigms for screening multiscale descriptors, especially from atomic scale to cluster mesoscale and bulk macroscale. The development of descriptors from traditional intermediate to eigen feature parameters has been addressed which provides guidance for the intelligent design of new energy materials.
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Affiliation(s)
- Dantong Zhang
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Qi Zhang
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Chao Peng
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Corresponding author
| | - Zhi Long
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Guilin Zhuang
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou, Zhejiang Province 310032, China
| | - Denis Kramer
- Helmut-Schmidt-University, University of the Armed Forces, Hamburg 22043, Germany
| | - Sridhar Komarneni
- Materials Research Institute, Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
| | - Chunyi Zhi
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China
- Corresponding author
| | - Dongfeng Xue
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Corresponding author
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3
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Liao M, Silva A, Du L, Nicolini P, Claerbout VEP, Kramer D, Yang R, Shi D, Polcar T, Zhang G. Twisting Dynamics of Large Lattice-Mismatch van der Waals Heterostructures. ACS Appl Mater Interfaces 2023; 15:19616-19623. [PMID: 37023057 DOI: 10.1021/acsami.3c00558] [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] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
van der Waals (vdW) homo/heterostructures are ideal systems for studying interfacial tribological properties such as structural superlubricity. Previous studies concentrated on the mechanism of translational motion in vdW interfaces. However, detailed mechanisms and general properties of the rotational motion are barely explored. Here, we combine experiments and simulations to reveal the twisting dynamics of the MoS2/graphite heterostructure. Unlike the translational friction falling into the superlubricity regime with no twist angle dependence, the dynamic rotational resistances highly depend on twist angles. Our results show that the periodic rotational resistance force originates from structural potential energy changes during the twisting. The structural potential energy of MoS2/graphite heterostructure increases monotonically from 0° to 30° twist angles, and the estimated relative energy barrier is (1.43 ± 0.36) × 10-3 J/m2. The formation of Moiré superstructures in the graphene layer is the key to controlling the structural potential energy of the MoS2/graphene heterostructure. Our results suggest that in twisting 2D heterostructures, even if the interface sliding friction is negligible, the evolving potential energy change results in a nonvanishing rotational resistance force. The structural change of the heterostructure can be an additional pathway for energy dissipation in the rotational motion, further enhancing the rotational friction force.
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Affiliation(s)
- Mengzhou Liao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, 16627 Prague 6, Czech Republic
| | - Andrea Silva
- National Centre for Advanced Tribology (nCATS), Department of Mechanical Engineering, University of Southampton, Highfield, SO17 1BJ Southampton, United Kingdom
- CNR-IOM, Consiglio Nazionale delle Ricerche - Istituto Officina dei Materiali, c/o SISSA, 34136 Trieste, Italy
| | - Luojun Du
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150 Aalto, Finland
| | - Paolo Nicolini
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, 16627 Prague 6, Czech Republic
- Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 18221 Prague 8, Czech Republic
| | - Victor E P Claerbout
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, 16627 Prague 6, Czech Republic
| | - Denis Kramer
- Mechanical Engineering, Helmut Schmidt University, Hamburg,22043, Germany
| | - Rong Yang
- College of Semiconductors (College of Integrated Circuits), Hunan University, Changsha 410082, China
| | - Dongxia Shi
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Tomas Polcar
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, 16627 Prague 6, Czech Republic
- National Centre for Advanced Tribology (nCATS), Department of Mechanical Engineering, University of Southampton, Highfield, SO17 1BJ Southampton, United Kingdom
| | - Guangyu Zhang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
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4
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Hollstein MM, Manzke V, Scheidmann SEF, Schrenker S, Schaffrinski M, Neubert E, Kramer D, Raker VK, Schön MP, Erpenbeck L. Targeting neutrophil extracellular traps (NETs) ameliorates inflammation in murine psoriasiform dermatitis. J Dermatol Sci 2023; 109:143-146. [PMID: 36878839 DOI: 10.1016/j.jdermsci.2023.02.006] [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: 08/08/2022] [Revised: 02/13/2023] [Accepted: 02/27/2023] [Indexed: 03/05/2023]
Affiliation(s)
- M M Hollstein
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - V Manzke
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - S E F Scheidmann
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - S Schrenker
- Department of Dermatology, University of Münster, Münster, Germany
| | - M Schaffrinski
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - E Neubert
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany; Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, the Netherlands
| | - D Kramer
- Department of Dermatology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - V K Raker
- Department of Dermatology, University of Münster, Münster, Germany
| | - M P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany; Lower Saxony Institute of Occupational Dermatology, University Medical Center Göttingen and University of Osnabrück, Germany
| | - L Erpenbeck
- Department of Dermatology, University of Münster, Münster, Germany.
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5
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Silva A, Cao J, Polcar T, Kramer D. Design Guidelines for Two-Dimensional Transition Metal Dichalcogenide Alloys. Chem Mater 2022; 34:10279-10290. [PMID: 36530938 PMCID: PMC9753562 DOI: 10.1021/acs.chemmater.2c01390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 11/14/2022] [Indexed: 06/17/2023]
Abstract
Two-dimensional (2D) materials and transition metal dichalcogenides (TMD) in particular are at the forefront of nanotechnology. To tailor their properties for engineering applications, alloying strategies-used successfully for bulk metals in the last century-need to be extended to this novel class of materials. Here we present a systematic analysis of the phase behavior of substitutional 2D alloys in the TMD family on both the metal and the chalcogenide site. The phase behavior is quantified in terms of a metastability metric and benchmarked against systematic computational screening of configurational energy landscapes from First-Principles. The resulting Pettifor maps can be used to identify broad trends across chemical spaces and as starting point for setting up rational search strategies in phase space, thus allowing for targeted computational analysis of properties on likely thermodynamically stable compounds. The results presented here also constitute a useful guideline for synthesis of binary metal 2D TMDs alloys via a range of synthesis techniques.
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Affiliation(s)
- Andrea Silva
- Faculty
of Engineering and Physical Sciences, University
of Southampton, University Road, SO17 1BJ Southampton, United Kingdom
- National
Centre for Advanced Tribology Study, University Road, SO17 1BJ Southampton, United Kingdom
| | - Jiangming Cao
- Faculty
of Mechanical and Civil Engineering, Helmut-Schmidt-Univeristy, Holstenhofweg 85, 22043 Hamburg, Germany
| | - Tomas Polcar
- Faculty
of Engineering and Physical Sciences, University
of Southampton, University Road, SO17 1BJ Southampton, United Kingdom
- Advanced
Materials Group, Faculty of Electrical Engineering, Czech Technical University in Prague (CTU), Karlovo Náměstí
13, 12135 Prague, Czech Republic
| | - Denis Kramer
- Faculty
of Engineering and Physical Sciences, University
of Southampton, University Road, SO17 1BJ Southampton, United Kingdom
- Faculty
of Mechanical and Civil Engineering, Helmut-Schmidt-Univeristy, Holstenhofweg 85, 22043 Hamburg, Germany
- Department
of Heterogeneous Catalysis, Helmholtz-Zentrum
Hereon, Max-Planck-Strasse
1, 21502 Geesthacht, Germany
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6
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Kramer D, Van der Merwe J, Lüthi M. A combined active shape and mean appearance model for the reconstruction of segmental bone loss. Med Eng Phys 2022; 110:103841. [PMID: 36031526 DOI: 10.1016/j.medengphy.2022.103841] [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] [Received: 09/29/2021] [Revised: 05/22/2022] [Accepted: 06/23/2022] [Indexed: 01/18/2023]
Abstract
This study investigates the novel combination of an active shape and mean appearance model to estimate missing bone geometry and density distribution from sparse inputs simulating segmental bone loss of the femoral diaphysis. An active shape Gaussian Process Morphable model was trained on healthy right femurs of South African males to model shape. The density distribution was approximated based on the mean appearance of computed tomography images from the training set. Estimations of diaphyseal resections were obtained by probabilistic fitting of the active shape model to sparse inputs consisting of proximal and distal femoral data on computed tomography images. The resulting shape estimates of the diaphyseal resections were then used to map the mean appearance model to the patients' missing bone geometry, constructing density estimations. In this way, resected bone surfaces were estimated with an average error of 2.24 (0.5) mm. Density distributions were approximated within 87 (0.7) % of the intensity of the original target images before the simulated segmental bone loss. These results fall within the acceptable tolerances required for surgical planning and reconstruction of long bone defects.
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Affiliation(s)
- D Kramer
- Department of Mechanical and Mechatronic Engineering, Stellenbosch University, Western-Cape, South Africa.
| | - J Van der Merwe
- Department of Mechanical and Mechatronic Engineering, Stellenbosch University, Western-Cape, South Africa.
| | - M Lüthi
- The Graphics and Vision Research Group, University of Basel, Basel 4001, Switzerland.
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7
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Gribaleva E, van der Molen SM, Kramer D, Horvath B, Allenova A, Diercks GFH, Pas HH. Subepidermal type VII collagen speckles as an additional clue for diagnosing epidermolysis bullosa acquisita by salt-split skin serum analysis. J Eur Acad Dermatol Venereol 2022; 36:e384-e386. [PMID: 35030274 DOI: 10.1111/jdv.17926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/22/2021] [Accepted: 01/07/2022] [Indexed: 11/29/2022]
Affiliation(s)
- E Gribaleva
- Division of Immune-mediated Skin Diseases, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - S M van der Molen
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - D Kramer
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - B Horvath
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - A Allenova
- Division of Immune-mediated Skin Diseases, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - G F H Diercks
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - H H Pas
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
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8
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Liao M, Nicolini P, Du L, Yuan J, Wang S, Yu H, Tang J, Cheng P, Watanabe K, Taniguchi T, Gu L, Claerbout VEP, Silva A, Kramer D, Polcar T, Yang R, Shi D, Zhang G. UItra-low friction and edge-pinning effect in large-lattice-mismatch van der Waals heterostructures. Nat Mater 2022; 21:47-53. [PMID: 34354215 DOI: 10.1038/s41563-021-01058-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 06/21/2021] [Indexed: 05/13/2023]
Abstract
Two-dimensional heterostructures are excellent platforms to realize twist-angle-independent ultra-low friction due to their weak interlayer van der Waals interactions and natural lattice mismatch. However, for finite-size interfaces, the effect of domain edges on the friction process remains unclear. Here we report the superlubricity phenomenon and the edge-pinning effect at MoS2/graphite and MoS2/hexagonal boron nitride van der Waals heterostructure interfaces. We found that the friction coefficients of these heterostructures are below 10-6. Molecular dynamics simulations corroborate the experiments, which highlights the contribution of edges and interface steps to friction forces. Our experiments and simulations provide more information on the sliding mechanism of finite low-dimensional structures, which is vital to understand the friction process of laminar solid lubricants.
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Affiliation(s)
- Mengzhou Liao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Paolo Nicolini
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Luojun Du
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Department of Electronics and Nanoengineering, Aalto University, Tietotie, Finland
| | - Jiahao Yuan
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Shuopei Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Hua Yu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Jian Tang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Peng Cheng
- Oxford Instruments (Shanghai) Co. Limited, Shanghai, China
| | - Kenji Watanabe
- National Institute for Materials Science, Tsukuba, Japan
| | | | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Victor E P Claerbout
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Andrea Silva
- National Centre for Advanced Tribology (nCATS), Department of Mechanical Engineering, University of Southampton, Southampton, UK
| | - Denis Kramer
- National Centre for Advanced Tribology (nCATS), Department of Mechanical Engineering, University of Southampton, Southampton, UK
- Faculty of Mechanical Engineering, Helmut Schmidt University, Hamburg, Germany
| | - Tomas Polcar
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
- National Centre for Advanced Tribology (nCATS), Department of Mechanical Engineering, University of Southampton, Southampton, UK
| | - Rong Yang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Dongxia Shi
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Guangyu Zhang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China.
- Songshan Lake Materials Laboratory, Dongguan, China.
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9
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Bhandari A, Peng C, Dziedzic J, Anton L, Owen JR, Kramer D, Skylaris CK. Electrochemistry from first-principles in the grand canonical ensemble. J Chem Phys 2021; 155:024114. [PMID: 34266248 DOI: 10.1063/5.0056514] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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
Progress in electrochemical technologies, such as automotive batteries, supercapacitors, and fuel cells, depends greatly on developing improved charged interfaces between electrodes and electrolytes. The rational development of such interfaces can benefit from the atomistic understanding of the materials involved by first-principles quantum mechanical simulations with Density Functional Theory (DFT). However, such simulations are typically performed on the electrode surface in the absence of its electrolyte environment and at constant charge. We have developed a new hybrid computational method combining DFT and the Poisson-Boltzmann equation (P-BE) capable of simulating experimental electrochemistry under potential control in the presence of a solvent and an electrolyte. The charged electrode is represented quantum-mechanically via linear-scaling DFT, which can model nanoscale systems with thousands of atoms and is neutralized by a counter electrolyte charge via the solution of a modified P-BE. Our approach works with the total free energy of the combined multiscale system in a grand canonical ensemble of electrons subject to a constant electrochemical potential. It is calibrated with respect to the reduction potential of common reference electrodes, such as the standard hydrogen electrode and the Li metal electrode, which is used as a reference electrode in Li-ion batteries. Our new method can be used to predict electrochemical properties under constant potential, and we demonstrate this in exemplar simulations of the differential capacitance of few-layer graphene electrodes and the charging of a graphene electrode coupled to a Li metal electrode at different voltages.
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Affiliation(s)
- Arihant Bhandari
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Chao Peng
- Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Jacek Dziedzic
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Lucian Anton
- Atos UK, 71 High Holborn London WC1V 6EA, United Kingdom
| | - John R Owen
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Denis Kramer
- Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Chris-Kriton Skylaris
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
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10
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Rugo HS, Umanzor G, Barrios FJ, Vasallo RH, Chivalan MA, Bejarano S, Ramirez JR, Fein L, Kowalyszyn RD, Cutler DL, Kramer D, Goldfinch J, Wang H, Moore T, Kwan RMF. Abstract PS13-11: Oral paclitaxel and encequidar (oPac+E) in the treatment of metastatic breast cancer (mBC): Management of gastrointestinal adverse events (GI AE). Study KX-ORAX-001. Cancer Res 2021. [DOI: 10.1158/1538-7445.sabcs20-ps13-11] [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: 11/16/2022]
Abstract
Abstract
Background: There is a need for more effective and less toxic treatments for patients with mBC. Patients may prefer oral vs IV cytotoxic therapies to avoid frequent hospital visits. In addition, oral therapies allow frequent or metronomic dosing regimens which may alter the toxicity or activity profile of agents vs infrequent IV administration. oPac+E is oral paclitaxel combination with Encequidar, a specific, minimally absorbed, oral p-glycoprotein inhibitor that facilitates the absorption of oral paclitaxel. mBC patients who received oPac+E had significantly greater confirmed tumor response and longer survival with lower rates and severity of neuropathy but increased GI AE compared to IV paclitaxel (IVPac) (Study KX-ORAX-001 presented at SABCS, 2019, Abstract # GS6-01).
Methods: Study KX-ORAX-001 was a phase III, randomized, study in women with mBC for whom treatment with IVPac was recommended. Patients were randomized 2:1 to receive oPac+E or IVPac. Patients continued treatment until discontinuation due to progressive disease or toxicity. oPac 205 mg/m2 was given once daily for 3 days weekly. E 12.9 mg was given 1 hour before each dose of oPac. IVPac 175 mg/m2 was infused over 3 hours every 3 weeks. The primary endpoint was efficacy defined as tumor response confirmed by BICR at two consecutive evaluations. Key secondary endpoints included PFS, OS. Safety was monitored throughout the study.
Results: All IVPac patients received high-dose dexamethasone and antihistamine premedication, which have significant anti-emetic activity and may have received additional anti-emetic agents as needed. The protocol did not allow any prophylaxis for GI AE for oPac+E patients nor were they to receive predose corticosteroids, nor antihistamines.
The protocol was amended after approximately 30% of patients were enrolled to allow prophylactic anti-emetic medications for patients randomized to oPac+E. Patients were also given loperamide to take at home and were instructed to initiate loperamide with the onset of diarrhea. The rates of Grade ≥2, vomiting and diarrhea for patients treated with IVPac, the patients treated with oPac+E prior to after the amendment are summarized in the table below.
Prophylactic anti-emetic therapy and early use of loperamide markedly decreased the incidence of ≥Grade 2 vomiting and diarrhea although there was a greater incidence than IVPac.
The most frequently prescribed anti-emetic agents for oPac+E treated patients were ondansetron (54%), metoclopramide (21%), domperidone (4%) and aprepitant (3%). For patients randomized to IVPac, the most frequently prescribed agents were ondanesteron (59%), granisetron (24%), palenosetron (7%) and aprepitant (2%). Oral administration of the oral NK1 inhibitor aprepitant appeared to be associated with increased incidence of oral paclitaxel systemic toxicity, potentially due to inhibition of metabolism of oPac by cytochrome P450 3A4.
Conclusions: oPac+E was associated with greater efficacy in the treatment of mBC and lower rates and severity of peripheral neuropathy, but increased GI AE compared to IVPac 175mg/m2. GI AE in oPac+E treated patients can be managed by prophylactic use of anti-emetics, primarily 5-HT3 inhibitors and early intervention with the anti-diarrhea agent loperamide. The use of the oral NK1 inhibitor aprepitant in combination with oPac+E is not recommended.(NTC02594371)
IVPacoPac+E Pre-AmendmentoPac+E Post AmendmentGrade 2Grade 3Grade 4Grade 2Grade 3Grade 4Grade 2Grade 3Grade 4Vomiting4%1%0%24%7%0%7%4%0%Diarrhea7%1%0%27%9%0%16%3%0.5%
Citation Format: H S Rugo, G Umanzor, F J Barrios, R H Vasallo, M A Chivalan, S Bejarano, J R Ramirez, L Fein, R D Kowalyszyn, D L Cutler, D Kramer, J Goldfinch, H Wang, T Moore, R MF Kwan. Oral paclitaxel and encequidar (oPac+E) in the treatment of metastatic breast cancer (mBC): Management of gastrointestinal adverse events (GI AE). Study KX-ORAX-001 [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr PS13-11.
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Affiliation(s)
- H S Rugo
- 1University of California San Francisco Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
| | - G Umanzor
- 2Liga Contra el Cancer, San Pedro Sula, Honduras
| | - F J Barrios
- 3Instituto Nacional de Cancerología (INCAN), Guatemala City, Guatemala
| | - R H Vasallo
- 4Clinical Research RD, Santo Domingo, Dominican Republic
| | - M A Chivalan
- 5CELAN Clinica Medica, Guatemala City, Guatemala
| | | | | | - L Fein
- 8Instituto de Oncologia de Rosario, Rosario, Argentina
| | - R D Kowalyszyn
- 9Centro de Investigaciones Clínica, Clínica Viedma, Argentina
| | | | | | | | - H Wang
- 10Athenex Inc., Buffalo, NY
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Rugo HS, Umanzor G, Barrios FJ, Vasallo RH, Chivalan MA, Bejarano S, Ramirez JR, Fein L, Kowalyszyn RD, Cutler DL, Kramer D, Goldfinch J, Wang H, Moore T, Kwan RMF. Abstract PS13-06: Lower rates of neuropathy with oral paclitaxel and encequidar (oPac+E) compared to IV paclitaxel (IVPac) in treatment of metastatic breast cancer (mBC): Study KX-ORAX-001. Cancer Res 2021. [DOI: 10.1158/1538-7445.sabcs20-ps13-06] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Chemotherapy-induced peripheral neuropathy (CIPN) is a common dose-limiting toxicity associated with IVPac. Primarily sensory, CIPN is an often irreversible condition primarily affecting the hands and feet associated with pain, numbness, tingling, and sensitivity to cold and has a significant impact on quality of life and treatment tolerance. Risk of CIPN increases with age, dose intensity, cumulative dose, and preexisting conditions including diabetes.
Methods: Study KX-ORAX-001 was a phase III, randomized, international study in women with mBC for whom treatment with IVPac was recommended. Eligible patients were randomized 2:1 to receive oPac+E or IVPac. Patients continued treatment until discontinuation due to progressive disease or toxicity. oPac 205 mg/m2 was given once daily for 3 days weekly. E 12.9 mg was given 1 hour before each dose of oPac. IVPac 175 mg/m2 was infused over 3 hours every 3 weeks. The primary endpoint was efficacy defined as tumor response confirmed by BICR at two consecutive evaluations. Key secondary endpoints included PFS, OS. Safety was monitored throughout the study.
Results: A total of 402 mBC patients were enrolled, 265 randomized to oPac+E and 137 to IVPac (ITT population). 399 patients were treated and comprise the safety population. The confirmed response rate was significantly greater in the oPac+E group vs IVPac (35% vs 23%) for the ITT population. Median overall survival was (27.7 vs 16.7 months, ITT) at the time of the analysis. Long-term follow up for final determination of PFS and OS is ongoing.Incidence of neuropathy-related TEAEs were lower in patients receiving oPac+E vs IVPac: Overall (21% vs 64%; all grades), grade ≥3 (2% vs 15%). Cumulative risk for neuropathy with IVPac was >50% by week 8 and was 83% at week 88. In contrast, the cumulative risk of neuropathy with oPac+E rose slowly and plateaued at 34% at week 88. Treatment discontinuations due to neuropathy occurred only in the IVPac arm (8%). Dose reductions due to neuropathy were reported in 8% of IVPac treated patients and in 2% of oPac+E treated patients. In agreement with the lower rates of peripheral neuropathy in patients treated with oPac+E, there was lower use of medications used for the treatment of neuropathic symptoms. Use of gabapentin or pregabalin was 12% for patients receiving oPac+E vs 40% for IVPac treated patients.
Conclusions: oPac+E was associated with greater efficacy in the treatment of patients with mBC and a lower incidence of neuropathy, slower onset and lesser severity of neuropathic events compared to IVPac 175mg/m2 administered every three weeks. Fewer patients receiving oPac+E required dose reduction due to neuropathy and no patients receiving oPac+E discontinued treatment due to neuropathy. Reduction in neuropathy may improve quality of life and allow longer administration of effective therapy while maintaining dose intensity.
Citation Format: H S Rugo, G Umanzor, F J Barrios, R H Vasallo, M A Chivalan, S Bejarano, J R Ramirez, L Fein, R D Kowalyszyn, D L Cutler, D Kramer, J Goldfinch, H Wang, T Moore, R MF Kwan. Lower rates of neuropathy with oral paclitaxel and encequidar (oPac+E) compared to IV paclitaxel (IVPac) in treatment of metastatic breast cancer (mBC): Study KX-ORAX-001 [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr PS13-06.
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Affiliation(s)
- H S Rugo
- 1University of California San Francisco Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
| | - G Umanzor
- 2Liga Contra el Cancer, San Pedro Sula, Honduras
| | - F J Barrios
- 3Instituto Nacional de Cancerología (INCAN), Guatemala City, Guatemala
| | - R H Vasallo
- 4Clinical Research RD, Santo Domingo, Dominican Republic
| | - M A Chivalan
- 5CELAN Clinica Medica, Guatemala City, Guatemala
| | | | | | - L Fein
- 8Instituto de Oncologia de Rosario, Rosario, Argentina
| | - R D Kowalyszyn
- 9Centro de Investigaciones Clínica, Clínica Viedma, Argentina
| | | | | | | | - H Wang
- 10Athenex Inc., Buffalo, NY
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Tourdot S, Abdolzade-Bavil A, Bessa J, Broët P, Fogdell-Hahn A, Giorgi M, Jawa V, Kuranda K, Legrand N, Pattijn S, Pedras-Vasconcelos JA, Rudy A, Salmikangas P, Scott DW, Snoeck V, Smith N, Spindeldreher S, Kramer D. 10 th European immunogenicity platform open symposium on immunogenicity of biopharmaceuticals. MAbs 2021; 12:1725369. [PMID: 32063088 PMCID: PMC7039638 DOI: 10.1080/19420862.2020.1725369] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Therapeutic proteins and emerging gene and cell-based therapies are attractive therapeutic tools for addressing unmet medical needs or when earlier conventional treatment approaches failed. However, the development of an immune response directed against therapeutic agents is a significant concern as it occurs in a substantial number of cases across products and indications. The specific anti-drug antibodies that develop can lead to safety adverse events as well as inhibition of drug activity or accelerated clearance, both phenomena resulting in loss of treatment efficacy. The European Immunogenicity Platform (EIP) is a meeting place for experts and newcomers to the immunogenicity field, designed to stimulate discussion amongst scientists across industry and academia, encourage interactions with regulatory agencies and share knowledge and the state-of-the-art of immunogenicity sciences with the broader scientific community. Here we report on the main topics covered during the EIP 10th Open Symposium on Immunogenicity of Biopharmaceuticals held in Lisbon, 26–27 February 2019, and the 1-d training course on practical and regulatory aspects of immunogenicity held ahead of the conference. These main topics included immunogenicity testing, clinical relevance of immunogenicity, immunogenicity prediction, regulatory aspects, tolerance induction as a mean to mitigate immunogenicity and immunogenicity in the context of gene therapy.
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Affiliation(s)
- S Tourdot
- BioMedicine Design, Pfizer Inc, Andover, MA, USA
| | - A Abdolzade-Bavil
- Large Molecule Bioanalytical Sciences, Pharma Research and Early Development (pRED), Roche Innovation Center Munich, Hoffmann-La Roche Ltd, Germany
| | - J Bessa
- Pharmaceutical Sciences, Pharma Research and Early Development (pRED), Roche Innovation Center Basel, Hoffmann-La Roche Ltd, Basel, Switzerland
| | - P Broët
- Faculty of Medicine Paris-Saclay, Orsay, France
| | - A Fogdell-Hahn
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - M Giorgi
- Certara QSP, Certara UK Limited, UK
| | - V Jawa
- Predictive and Clinical Immunogenicity, PPDM, Merck & Co, Kenilworth, NJ, USA
| | - K Kuranda
- Translational Department, Sparks Therapeutics, Philadelphia, PA, USA
| | | | | | | | - A Rudy
- HEXAL AG, Holzkirchen, Germany
| | | | - D W Scott
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - V Snoeck
- Translational Biomarkers and Bioanalysis, UCB Biopharma SRL, Braine-l'Alleud, Belgium
| | | | | | - D Kramer
- Sanofi R&D, Translational Medicine & Early Development, Sanofi, Frankfurt am Main, Germany
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Wu J, Li P, Parra-Puerto A, Wu S, Lin X, Kramer D, Chen S, Kucernak A. Controllable Heteroatom Doping Effects of Cr xCo 2-xP Nanoparticles: a Robust Electrocatalyst for Overall Water Splitting in Alkaline Solutions. ACS Appl Mater Interfaces 2020; 12:47397-47407. [PMID: 32975403 DOI: 10.1021/acsami.0c10441] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effect of doping Cr on the electrocatalytic activity of Co2P supported on carbon black (CrxCo2-xP/CB) for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution was investigated. A beneficial improvement in the performance of Co2P toward HER and OER was discovered. For the HER at -200 mV overpotential, the turnover frequency (TOF) increases almost 6-fold from 0.26 to 1.52 electron siteCo-1 s-1 when Co2P/CB has a small amount of Cr added to form Cr0.2Co1.8P/CB. Similarly, we estimate an increase from 0.205 to 0.585 electron siteCo-1 s-1 for the OER at 1.6 V for the same change in composition. With 10 atom % Cr doping, the Cr0.2Co1.8P/CB catalyst needed 226 mV overpotential to produce a cathodic current density of -100 A gCo-1 and 380 mV overpotential to produce an anodic current density of 100 A gCo-1. Based on both experimental results and theoretical calculations, the activity improvement results from optimization of the electronic properties of Co2P after Cr doping.
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Affiliation(s)
- Jun Wu
- Department of Chemistry, Imperial College London, London SW7 2AZ, U.K
| | - Peng Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, People's Republic of China
| | | | - Shuang Wu
- SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, People's Republic of China
| | - Xiaoqian Lin
- Department of Chemistry, Imperial College London, London SW7 2AZ, U.K
| | - Denis Kramer
- Faculty of Engineer Physical Sciences, University of Southampton, Southampton SO17 1BJ, U.K
| | - Shengli Chen
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, People's Republic of China
| | - Anthony Kucernak
- Department of Chemistry, Imperial College London, London SW7 2AZ, U.K
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Silva A, Claerbout VEP, Polcar T, Kramer D, Nicolini P. Exploring the Stability of Twisted van der Waals Heterostructures. ACS Appl Mater Interfaces 2020; 12:45214-45221. [PMID: 32894936 DOI: 10.1021/acsami.0c13971] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recent research showed that the rotational degree of freedom in stacking 2D materials yields great changes in the electronic properties. Here, we focus on an often overlooked question: are twisted geometries stable and what defines their rotational energy landscape? Our simulations show how epitaxy theory breaks down in these systems, and we explain the observed behavior in terms of an interplay between flexural phonons and the interlayer coupling, governed by the moiré superlattice. Our argument, applied to the well-studied MoS2/graphene system, rationalizes experimental results and could serve as guidance to design twistronic devices.
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Affiliation(s)
- Andrea Silva
- Engineering Materials, University of Southampton, Southampton SO17 1BJ, U.K
- national Centre for Advanced Tribology Study at University of Southampton, Southampton SO17 1BJ, U.K
| | - Victor E P Claerbout
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, Prague 6 16627, Czech Republic
| | - Tomas Polcar
- Engineering Materials, University of Southampton, Southampton SO17 1BJ, U.K
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, Prague 6 16627, Czech Republic
| | - Denis Kramer
- Engineering Materials, University of Southampton, Southampton SO17 1BJ, U.K
- Mechanical Engineering, Helmut Schmidt University, Hamburg 22043, Germany
| | - Paolo Nicolini
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, Prague 6 16627, Czech Republic
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15
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Bhandari A, Anton L, Dziedzic J, Peng C, Kramer D, Skylaris CK. Electronic structure calculations in electrolyte solutions: Methods for neutralization of extended charged interfaces. J Chem Phys 2020; 153:124101. [DOI: 10.1063/5.0021210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Arihant Bhandari
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
| | - Lucian Anton
- CCFE, Culham Science Centre, Abingdon, United Kingdom
| | - Jacek Dziedzic
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk 80-233, Poland
| | - Chao Peng
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
- Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Denis Kramer
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
- Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
- Helmut-Schmidt-University, University of the Armed Forces, 22043 Hamburg, Germany
| | - Chris-Kriton Skylaris
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
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16
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Jackson C, Smith G, Russell AE, Levecque P, Kramer D. Electronic metal-support interactions in vacuum vs. electrolyte. Nat Commun 2020; 11:1470. [PMID: 32193392 PMCID: PMC7081312 DOI: 10.1038/s41467-020-15307-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 02/25/2020] [Indexed: 11/09/2022] Open
Affiliation(s)
- Colleen Jackson
- Department of Chemistry, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Graham Smith
- HySA/Catalysis, Catalysis Institute, Department of Chemical Engineering, University of Cape Town, Corner of Madiba Circle and South Lane, Rondebosch, 7701, South Africa
| | - Andrea E Russell
- School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK
| | - Pieter Levecque
- HySA/Catalysis, Catalysis Institute, Department of Chemical Engineering, University of Cape Town, Corner of Madiba Circle and South Lane, Rondebosch, 7701, South Africa
| | - Denis Kramer
- Engineering Sciences, University of Southampton, University Road, Southampton, SO17 1BJ, UK. .,Faculty of Mechanical Engineering, Helmut Schmidt University, 22043, Hamburg, Germany.
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Jackson C, Smith GT, Mpofu N, Dawson JMS, Khoza T, September C, Taylor SM, Inwood DW, Leach AS, Kramer D, Russell AE, Kucernak ARJ, Levecque PBJ. A quick and versatile one step metal–organic chemical deposition method for supported Pt and Pt-alloy catalysts. RSC Adv 2020; 10:19982-19996. [PMID: 35520426 PMCID: PMC9054134 DOI: 10.1039/d0ra03001e] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/20/2020] [Indexed: 01/24/2023] Open
Abstract
A simple, modified Metal–Organic Chemical Deposition (MOCD) method for Pt, PtRu and PtCo nanoparticle deposition onto a variety of support materials, including C, SiC, B4C, LaB6, TiB2, TiN and a ceramic/carbon nanofiber, is described.
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Affiliation(s)
| | | | - Nobuhle Mpofu
- HySA/Catalysis
- Centre for Catalysis Research
- Department of Chemical Engineering
- University of Cape Town
- South Africa
| | | | | | | | | | | | - Andrew S. Leach
- Electrochemical Innovation Lab
- University College London
- London
- UK
| | - Denis Kramer
- Faculty of Engineering and the Environment
- University of Southampton
- Southampton
- UK
| | | | | | - Pieter B. J. Levecque
- HySA/Catalysis
- Centre for Catalysis Research
- Department of Chemical Engineering
- University of Cape Town
- South Africa
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Velpula PK, Ďurák M, Kramer D, Meadows AR, Vilémová M, Rus B. Evolution of femtosecond laser damage in a hafnia-silica multi-layer dielectric coating. Opt Lett 2019; 44:5342-5345. [PMID: 31675003 DOI: 10.1364/ol.44.005342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/02/2019] [Indexed: 06/10/2023]
Abstract
To optimize optical coating materials, designs, and technologies for high damage resistance, understanding the growth of laser damage is of paramount importance. In this Letter, we show the evolution of femtosecond laser damage in a hafnia-silica (HfO2/SiO2) multilayer dielectric mirror coating. Depending on various spatial features of damaged sites, we identified several regimes of the laser-material interaction with varying laser fluence and incident number of pulses. A change in surface roughness has been observed only for a small number of pulses, and interestingly, a threshold number of pulses is found for nanocrack formation. We report the polarization-dependent orientation of nanocracks and their growth with an increasing number of pulses. The presented results demonstrate that the laser damage originates from the nanobumps and surface roughening, which then leads to the formation of nanocracks. The presented experimental results acknowledge the existing theoretical models in bulk dielectrics to explain the formation of nanostructures by interference of the incident laser with the scattering radiation from laser-induced inhomogeneities and growth of the field enhancement due to nanoplasma.
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Chen M, Chao Y, Tenner L, Hung N, Cutler D, Kramer D, Kwan MFR, Hung CT. A phase Ib study of oraxol in combination with ramucirumab in patients with gastric or esophageal cancers who failed previous chemotherapy. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz247.126] [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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20
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Loong HHF, Mennel R, Wagner M, Tse T, Lau YM, Yuen C, Moore R, Kwan MFR, Cutler D, Kramer D, Chan WK, Ravi V. A pilot study of oral paclitaxel (ORAXOL) in subjects with cutaneous angiosarcomas (KX-ORAX-010). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz283.066] [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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21
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Jackson CGCA, Deva S, Bayston K, McLaren B, Barlow P, Hung N, Clarke K, Segelov E, Chao TY, Dai MS, Yen HT, Cutler D, Kramer D, Zhi J, Chan WK, Kwan MFR, Hung CT. An international randomized cross-over bio-equivalence study of oral paclitaxel + HM30181 compared with weekly intravenous (IV) paclitaxel in patients with advanced solid tumours. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz244.039] [Citation(s) in RCA: 4] [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] [Indexed: 11/14/2022] Open
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22
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Ojha M, Le Houx J, Mukkabla R, Kramer D, Andrew Wills RG, Deepa M. Lithium titanate/pyrenecarboxylic acid decorated carbon nanotubes hybrid - Alginate gel supercapacitor. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.211] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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23
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Hendrix MLE, van Kuijk SMJ, Gavilanes AWD, Kramer D, Spaanderman MEA, Al Nasiry S. Reduced fetal growth velocities and the association with neonatal outcomes in appropriate-for-gestational-age neonates: a retrospective cohort study. BMC Pregnancy Childbirth 2019; 19:31. [PMID: 30646865 PMCID: PMC6332558 DOI: 10.1186/s12884-018-2167-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 01/15/2018] [Accepted: 12/28/2018] [Indexed: 12/23/2022] Open
Abstract
Background Fetal growth restriction is, despite advances in neonatal care and uptake of antenatal ultrasound scanning, still a major cause of perinatal morbidity. Neonates with birth weight > 10th percentile are assumed to be appropriate-for-gestational-age (AGA), although many are at increased risk of perinatal morbidity, because of undetected mild restriction of growth potential. We hypothesized that within AGA neonates, reduced fetal growth velocities are associated with adverse neonatal outcome. Methods A retrospective cohort study of singleton pregnancies, in the Maastricht University Medical Centre (MUMC) between 2010 and 2016. Women had two fetal biometry scans (18–22 weeks and 30–34 weeks of gestational age) and delivered a newborn with a birth weight between the 10th–80th percentile. Differences in growth velocities of the abdominal circumference (AC), biparietal diameter (BPD), head circumference (HC) and femur length (FL) were compared between the suboptimal AGA (sAGA) (birth weight centiles 10–50) and optimal AGA (oAGA) (birth weight centiles 50–80) group. We assessed the association between velocities and neonatal outcomes. Results We included 934 singleton pregnancies. In the suboptimal AGA group, fetal growth velocities were lower (in mm/week): AC 10.72 ± 1.00 vs 11.23 ± 1.00 (p < .001), HC 10.50 ± 0.80 vs 10.68 ± 0.77 (p = 0.001), BPD 3.01 ± 0.28 vs 3.08 ± 0.27 (p < .0001) and FL 2.47 ± 0.21 vs 2.50 ± 0.22 (p = 0.014), compared to the optimal AGA group. Neonates with an adverse neonatal outcome had significantly lower growth velocities (in mm/week) of: AC 10.57 vs 10.94 (p = 0.034), HC 10.28 vs 10.59 (p = 0.003) and BPD 2.97 vs 3.04 (p = 0.043) compared to those with normal outcome. An inverse association was observed between the AC velocity and a composite adverse neonatal outcome (OR) = 0.667 (95%CI 0.507–0.879, p = 0.004), and between the AC velocity and neonates with NICU stay (OR) = 0.733 (95%CI 0.570–0.942, p = 0.015). Neonates with a birthweight lower than expected (based on the abdominal circumference at 20 weeks) had significantly more composite adverse neonatal outcomes 8.5% vs 5.0% (p = 0.047), NICU stays 9.6% vs 3.8% (p < .0001) and hospital stays 44.4% vs 35.6% (p = 0.006). Conclusions Appropriate-for-gestational-age neonates are a heterogeneous group with some showing suboptimal fetal growth. Abnormal fetal growth velocities, especially abdominal circumference velocity, are associated with adverse neonatal outcome and can potentially improve the detection of mild growth restriction when used in multivariate models.
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Affiliation(s)
- M L E Hendrix
- Department of Obstetrics & Gynaecology, GROW School of Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), PO Box 5800, 6202, AZ, Maastricht, The Netherlands.
| | - S M J van Kuijk
- Department of Clinical Epidemiology and Medical Technology Assessment (KEMTA), Maastricht, University Medical Centre (MUMC), Maastricht, The Netherlands
| | - A W D Gavilanes
- Department of Paediatrics, Maastricht University Medical Centre (MUMC), Maastricht, The Netherlands.,Department of Translational Neuroscience, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands.,Institute of Biomedicine, Facultad de Ciencias Médicas, Universidad Católica de Santiago de Guayaquil, Guayaquil, Ecuador
| | - D Kramer
- Department of Obstetrics & Gynaecology, GROW School of Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), PO Box 5800, 6202, AZ, Maastricht, The Netherlands
| | - M E A Spaanderman
- Department of Obstetrics & Gynaecology, GROW School of Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), PO Box 5800, 6202, AZ, Maastricht, The Netherlands
| | - S Al Nasiry
- Department of Obstetrics & Gynaecology, GROW School of Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), PO Box 5800, 6202, AZ, Maastricht, The Netherlands
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Jackson C, Smith GT, Markiewicz M, Inwood DW, Leach AS, Whalley PS, Kucernak AR, Russell AE, Kramer D, Levecque PB. Support induced charge transfer effects on electrochemical characteristics of Pt nanoparticle electrocatalysts. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.10.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Joudi N, Andrade F, Llanes I, Garcia M, Kramer D, Carugno J. 101: Analysis of implementation of a hysterectomy clinical decision tree algorithm in a large academic center. Am J Obstet Gynecol 2018. [DOI: 10.1016/j.ajog.2017.12.120] [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]
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26
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van Schaik IN, Bril V, van Geloven N, Hartung HP, Lewis RA, Sobue G, Lawo JP, Praus M, Mielke O, Durn BL, Cornblath DR, Merkies ISJ, Sabet A, George K, Roberts L, Carne R, Blum S, Henderson R, Van Damme P, Demeestere J, Larue S, D'Amour C, Bril V, Breiner A, Kunc P, Valis M, Sussova J, Kalous T, Talab R, Bednar M, Toomsoo T, Rubanovits I, Gross-Paju K, Sorro U, Saarela M, Auranen M, Pouget J, Attarian S, Le Masson G, Wielanek-Bachelet A, Desnuelle C, Delmont E, Clavelou P, Aufauvre D, Schmidt J, Zschuentssch J, Sommer C, Kramer D, Hoffmann O, Goerlitz C, Haas J, Chatzopoulos M, Yoon R, Gold R, Berlit P, Jaspert-Grehl A, Liebetanz D, Kutschenko A, Stangel M, Trebst C, Baum P, Bergh F, Klehmet J, Meisel A, Klostermann F, Oechtering J, Lehmann H, Schroeter M, Hagenacker T, Mueller D, Sperfeld A, Bethke F, Drory V, Algom A, Yarnitsky D, Murinson B, Di Muzio A, Ciccocioppo F, Sorbi S, Mata S, Schenone A, Grandis M, Lauria G, Cazzato D, Antonini G, Morino S, Cocito D, Zibetti M, Yokota T, Ohkubo T, Kanda T, Kawai M, Kaida K, Onoue H, Kuwabara S, Mori M, Iijima M, Ohyama K, Baba M, Tomiyama M, Nishiyama K, Akutsu T, Yokoyama K, Kanai K, van Schaik I, Eftimov F, Notermans N, Visser N, Faber C, Hoeijmakers J, Rejdak K, Chyrchel-Paszkiewicz U, Casanovas Pons C, Alberti Aguiló M, Gamez J, Figueras M, Marquez Infante C, Benitez Rivero S, Lunn M, Morrow J, Gosal D, Lavin T, Melamed I, Testori A, Ajroud-Driss S, Menichella D, Simpson E, Chi-Ho Lai E, Dimachkie M, Barohn R, Beydoun S, Johl H, Lange D, Shtilbans A, Muley S, Ladha S, Freimer M, Kissel J, Latov N, Chin R, Ubogu E, Mumfrey S, Rao T, MacDonald P, Sharma K, Gonzalez G, Allen J, Walk D, Hobson-Webb L, Gable K. Subcutaneous immunoglobulin for maintenance treatment in chronic inflammatory demyelinating polyneuropathy (PATH): a randomised, double-blind, placebo-controlled, phase 3 trial. Lancet Neurol 2018; 17:35-46. [DOI: 10.1016/s1474-4422(17)30378-2] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/28/2017] [Accepted: 10/02/2017] [Indexed: 10/18/2022]
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Jackson CGCA, Deva S, Bayston K, Barlow P, Eden K, Hung N, Fetterly G, Cutler D, Kwan R, Kramer D, Chan WK, Hung T. An open-label, randomized cross-over bioavailability study of oral paclitaxel and HM30181 compared with weekly intravenous (IV) paclitaxel in patients with advanced solid tumours. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx658] [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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28
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Becker D, Kramer D, Müllges W, Boelmans K. P 164 Parietal stroke mimicking the Heidenhain variant of Creutzfeldt-Jakob Disease. Clin Neurophysiol 2017. [DOI: 10.1016/j.clinph.2017.06.235] [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]
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Moschny J, Schneider P, Lorenzen W, Jahns S, Enke H, Kramer D, Niedermeyer Timo HJ. New approaches to handle old compounds – the generation of microcystin and nodularin derivatives with “clickable” features. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608362] [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: 10/18/2022]
Affiliation(s)
- J Moschny
- Institute of Pharmacy, RG Biogenic Drugs, Martin-Luther-Universität Halle-Wittenberg, Hoher Weg 8, 06120 Halle (Saale), Germany
| | - P Schneider
- Interfaculty Institute of Microbiology and Infection Medicine, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany
| | - W Lorenzen
- Cyano Biotech GmbH, Magnusstr. 11, 12489 Berlin, Germany
| | - S Jahns
- Cyano Biotech GmbH, Magnusstr. 11, 12489 Berlin, Germany
| | - H Enke
- Cyano Biotech GmbH, Magnusstr. 11, 12489 Berlin, Germany
| | - D Kramer
- Cyano Biotech GmbH, Magnusstr. 11, 12489 Berlin, Germany
| | - HJ Niedermeyer Timo
- Institute of Pharmacy, RG Biogenic Drugs, Martin-Luther-Universität Halle-Wittenberg, Hoher Weg 8, 06120 Halle (Saale), Germany
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Mercer MP, Finnigan S, Kramer D, Richards D, Hoster HE. The influence of point defects on the entropy profiles of Lithium Ion Battery cathodes: a lattice-gas Monte Carlo study. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.115] [Citation(s) in RCA: 19] [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: 11/25/2022]
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Jackson C, Smith GT, Inwood DW, Leach AS, Whalley PS, Callisti M, Polcar T, Russell AE, Levecque P, Kramer D. Electronic metal-support interaction enhanced oxygen reduction activity and stability of boron carbide supported platinum. Nat Commun 2017. [PMID: 28639621 PMCID: PMC5489685 DOI: 10.1038/ncomms15802] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [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] [Indexed: 12/22/2022] Open
Abstract
Catalysing the reduction of oxygen in acidic media is a standing challenge. Although activity of platinum, the most active metal, can be substantially improved by alloying, alloy stability remains a concern. Here we report that platinum nanoparticles supported on graphite-rich boron carbide show a 50-100% increase in activity in acidic media and improved cycle stability compared to commercial carbon supported platinum nanoparticles. Transmission electron microscopy and x-ray absorption fine structure analysis confirm similar platinum nanoparticle shapes, sizes, lattice parameters, and cluster packing on both supports, while x-ray photoelectron and absorption spectroscopy demonstrate a change in electronic structure. This shows that purely electronic metal-support interactions can significantly improve oxygen reduction activity without inducing shape, alloying or strain effects and without compromising stability. Optimizing the electronic interaction between the catalyst and support is, therefore, a promising approach for advanced electrocatalysts where optimizing the catalytic nanoparticles themselves is constrained by other concerns.
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Affiliation(s)
- Colleen Jackson
- HySA/Catalysis, Catalysis Institute, Department of Chemical Engineering, University of Cape Town, Corner of Madiba Circle and South Lane, Rondebosch 7701, South Africa
| | - Graham T Smith
- HySA/Catalysis, Catalysis Institute, Department of Chemical Engineering, University of Cape Town, Corner of Madiba Circle and South Lane, Rondebosch 7701, South Africa.,Engineering Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - David W Inwood
- Department of Chemistry, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Andrew S Leach
- Department of Chemistry, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Penny S Whalley
- Department of Chemistry, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Mauro Callisti
- Engineering Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Tomas Polcar
- Engineering Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Andrea E Russell
- Department of Chemistry, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Pieter Levecque
- HySA/Catalysis, Catalysis Institute, Department of Chemical Engineering, University of Cape Town, Corner of Madiba Circle and South Lane, Rondebosch 7701, South Africa
| | - Denis Kramer
- Engineering Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
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Boyden LM, Craiglow BG, Hu RH, Zhou J, Browning J, Eichenfield L, Lim YL, Luu M, Randolph LM, Ginarte M, Fachal L, Rodriguez-Pazos L, Vega A, Kramer D, Yosipovitch G, Vahidnezhad H, Youssefian L, Uitto J, Lifton RP, Paller AS, Milstone LM, Choate KA. Phenotypic spectrum of autosomal recessive congenital ichthyosis due to PNPLA1 mutation. Br J Dermatol 2017; 177:319-322. [PMID: 28403545 DOI: 10.1111/bjd.15570] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- L M Boyden
- Department of Genetics, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
| | - B G Craiglow
- Department of Dermatology, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A.,Department of Pediatrics, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
| | - R H Hu
- Department of Dermatology, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
| | - J Zhou
- Department of Dermatology, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
| | - J Browning
- Department of Dermatology, Baylor College of Medicine, San Antonio, TX, U.S.A
| | - L Eichenfield
- Department of Dermatology, University of California San Diego, San Diego, CA, U.S.A
| | - Y L Lim
- Department of Dermatology, National Skin Centre, Singapore, Singapore
| | - M Luu
- Division of Dermatology, Children's Hospital of Los Angeles, Los Angeles, CA, U.S.A
| | - L M Randolph
- Division of Medical Genetics, Children's Hospital of Los Angeles, Los Angeles, CA, U.S.A
| | - M Ginarte
- Department of Dermatology, Complejo Hospitalario Universitario, Santiago de Compostela, Spain
| | - L Fachal
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
| | - L Rodriguez-Pazos
- Servicio de Dermatología, Complejo Hospitalario Universitario de Vigo, Vigo, Spain
| | - A Vega
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
| | - D Kramer
- Department of Dermatology, Hospital Luis Calvo Mackenna, Santiago, Chile
| | - G Yosipovitch
- Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, Miami, FL, U.S.A
| | - H Vahidnezhad
- Department of Dermatology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, U.S.A
| | - L Youssefian
- Department of Dermatology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, U.S.A
| | - J Uitto
- Department of Dermatology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, U.S.A
| | - R P Lifton
- Department of Genetics, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
| | - A S Paller
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, U.S.A
| | - L M Milstone
- Department of Dermatology, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
| | - K A Choate
- Department of Genetics, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A.,Department of Dermatology, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A.,Department of Pathology, Yale University School of Medicine, PO Box 208059, New Haven, CT, 06520, U.S.A
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Desai A, Chow K, Wan P, O’shea D, Ranaghan C, Anderson K, Kramer D, Goldberg J, Rawlins R, Koczela E, Klimek V. Impact of Early Integration of Palliative Care on Health Care Proxy (HCP) Documentation by Patients with Myelodysplastic Syndromes (MDS). Leuk Res 2017. [DOI: 10.1016/s0145-2126(17)30334-x] [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: 10/19/2022]
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34
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Nemajerova A, Kramer D, Siller S, Herr C, Shomroni O, Pena T, Gallinas Suazo C, Glaser K, Wildung M, Steffen H, Sriraman A, Oberle F, Wienken M, Hennion M, Vidal R, Royen B, Alevra M, Schild D, Bals R, Dönitz J, Riedel D, Bonn S, Takemaru KI, Moll U, Lizé M. TAp73 is a central transcriptional regulator of airway multiciliogenesis and protects bronchial function. Pneumologie 2016. [DOI: 10.1055/s-0036-1592291] [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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35
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Gunabushanam V, Clendenon J, Aldag E, Chadha M, Kramer D, Steers J, Sahajpal A. En Bloc Liver Kidney Transplantation Using Donor Splenic Artery as Inflow to the Kidney: Report of Two Cases. Am J Transplant 2016; 16:3046-3048. [PMID: 27224090 DOI: 10.1111/ajt.13885] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 05/17/2016] [Accepted: 05/18/2016] [Indexed: 01/25/2023]
Abstract
The number of simultaneous liver-kidney transplants has been increasing. This surgery is associated with an increased risk of complications, longer duration of surgery and longer ischemia time for the renal allograft. Two patients listed for liver-kidney transplant at our center underwent en bloc combined liver-kidney transplantation using donor splenic artery as inflow. Patient 1 previously underwent cardiac catheterization that was complicated by a bleeding pseudoaneurysm of the right external iliac artery that required endovascular stenting of the external iliac artery and embolization of the inferior epigastric artery. Patient 2 was on vasopressor support and continuous renal replacement therapy at the time of transplant. In this paper, we described a novel technique of en bloc liver-kidney transplant with simultaneous reperfusion of both allografts using the donor splenic artery for renal inflow. This technique is useful for decreasing cold ischemia time and total operative time by simultaneous reperfusion of both allografts. It is a useful technical variant that can be used in patients with severe disease of the iliac arteries.
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Affiliation(s)
- V Gunabushanam
- Division of Abdominal Transplant and Hepatobiliary Surgery, Aurora-St Luke's Medical Center, Milwaukee, WI
| | - J Clendenon
- Division of Abdominal Transplant and Hepatobiliary Surgery, Aurora-St Luke's Medical Center, Milwaukee, WI
| | - E Aldag
- Division of Abdominal Transplant and Hepatobiliary Surgery, Aurora-St Luke's Medical Center, Milwaukee, WI
| | - M Chadha
- Division of Abdominal Transplant and Hepatobiliary Surgery, Aurora-St Luke's Medical Center, Milwaukee, WI.,Division of Critical Care, Aurora-St Luke's Medical Center, Milwaukee, WI
| | - D Kramer
- Division of Critical Care, Aurora-St Luke's Medical Center, Milwaukee, WI
| | - J Steers
- Division of Abdominal Transplant and Hepatobiliary Surgery, Aurora-St Luke's Medical Center, Milwaukee, WI
| | - A Sahajpal
- Division of Abdominal Transplant and Hepatobiliary Surgery, Aurora-St Luke's Medical Center, Milwaukee, WI
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Tjaden B, Cooper SJ, Brett DJL, Kramer D, Shearing PR. On the origin and application of the Bruggeman correlation for analysing transport phenomena in electrochemical systems. Curr Opin Chem Eng 2016. [DOI: 10.1016/j.coche.2016.02.006] [Citation(s) in RCA: 224] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Celorrio V, Calvillo L, Dann E, Granozzi G, Aguadero A, Kramer D, Russell AE, Fermín DJ. Oxygen reduction reaction at LaxCa1−xMnO3 nanostructures: interplay between A-site segregation and B-site valency. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01105e] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed surface vs. bulk composition studies of LaxCa1−xMnO3 oxides provide clear evidence that the ORR activity increases as the effective electron population at the Mn site increases.
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Affiliation(s)
| | - Laura Calvillo
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | - Ellie Dann
- School of Chemistry
- University of Bristol
- Bristol
- UK
| | - Gaetano Granozzi
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | | | - Denis Kramer
- Engineering Sciences
- University of Southampton
- Southampton
- UK
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Rup B, Pallardy M, Sikkema D, Albert T, Allez M, Broet P, Carini C, Creeke P, Davidson J, De Vries N, Finco D, Fogdell-Hahn A, Havrdova E, Hincelin-Mery A, C Holland M, H Jensen PE, Jury EC, Kirby H, Kramer D, Lacroix-Desmazes S, Legrand J, Maggi E, Maillère B, Mariette X, Mauri C, Mikol V, Mulleman D, Oldenburg J, Paintaud G, R Pedersen C, Ruperto N, Seitz R, Spindeldreher S, Deisenhammer F. Standardizing terms, definitions and concepts for describing and interpreting unwanted immunogenicity of biopharmaceuticals: recommendations of the Innovative Medicines Initiative ABIRISK consortium. Clin Exp Immunol 2015; 181:385-400. [PMID: 25959571 PMCID: PMC4557374 DOI: 10.1111/cei.12652] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/23/2015] [Indexed: 12/17/2022] Open
Abstract
Biopharmaceuticals (BPs) represent a rapidly growing class of approved and investigational drug therapies that is contributing significantly to advancing treatment in multiple disease areas, including inflammatory and autoimmune diseases, genetic deficiencies and cancer. Unfortunately, unwanted immunogenic responses to BPs, in particular those affecting clinical safety or efficacy, remain among the most common negative effects associated with this important class of drugs. To manage and reduce risk of unwanted immunogenicity, diverse communities of clinicians, pharmaceutical industry and academic scientists are involved in: interpretation and management of clinical and biological outcomes of BP immunogenicity, improvement of methods for describing, predicting and mitigating immunogenicity risk and elucidation of underlying causes. Collaboration and alignment of efforts across these communities is made difficult due to lack of agreement on concepts, practices and standardized terms and definitions related to immunogenicity. The Innovative Medicines Initiative (IMI; http://www.imi-europe.org), ABIRISK consortium [Anti-Biopharmaceutical (BP) Immunization Prediction and Clinical Relevance to Reduce the Risk; http://www.abirisk.eu] was formed by leading clinicians, academic scientists and EFPIA (European Federation of Pharmaceutical Industries and Associations) members to elucidate underlying causes, improve methods for immunogenicity prediction and mitigation and establish common definitions around terms and concepts related to immunogenicity. These efforts are expected to facilitate broader collaborations and lead to new guidelines for managing immunogenicity. To support alignment, an overview of concepts behind the set of key terms and definitions adopted to date by ABIRISK is provided herein along with a link to access and download the ABIRISK terms and definitions and provide comments (http://www.abirisk.eu/index_t_and_d.asp).
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Affiliation(s)
- B Rup
- Pfizer, Immunogenicity Sciences Disciple, Pharmacokinetics, Dynamics and Metabolism
| | - M Pallardy
- INSERM, UMR996, Faculté Pharmacie, Université Paris Sud, France
| | - D Sikkema
- GlaxoSmithKline, Clinical Immunology-Biopharm, King of Prussia, PA, USA
| | - T Albert
- Institute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany
| | - M Allez
- Hôpital Saint-Louis, Department of Gastroenterology, GETAID, Paris, France
| | - P Broet
- INSERM, UMR669, University of Paris Sud, France
| | - C Carini
- Pfizer, Early Biotech Clinical Development, Cambridge, MA, USA
| | - P Creeke
- Centre for Neuroscience and Trauma, Blizard Institute, Queen Mary University of London, London, UK
| | - J Davidson
- GlaxoSmithKline, Worldwide Epidemiology, Southall, UK
| | - N De Vries
- Clinical Immunology and Rheumatology, University of Amsterdam, Amsterdam, the Netherlands
| | - D Finco
- Pfizer, Drug Safety R&D, Groton, CT, USA
| | - A Fogdell-Hahn
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - E Havrdova
- Department of Neurology and Center for Clinical Neuroscience, MS Center, Charles University in Prague, Prague, Czech Republic
| | - A Hincelin-Mery
- Sanofi-Aventis, Clinical Exploratory and Pharmacology, Chilly-Mazerin, FR
| | - M C Holland
- GlaxoSmithKline, Clinical Immunology-Biopharm R&D, King of Prussia, PA, USA
| | - P E H Jensen
- Department of Neurology, University of Copenhagen, Copenhagen, Denmark
| | - E C Jury
- Centre for Rheumatology, University College London, London, UK
| | - H Kirby
- UCB Pharma, Bioanalytical R&D, Slough, UK
| | - D Kramer
- Merck-Serono, Institute of Drug Metabolism and Pharmacokinetics, Grafing, Germany
| | | | - J Legrand
- Ipsen Innovation, Pharmacokinetics Drug Metabolism Department, Les Ulis, France
| | - E Maggi
- Dipartimento di Medicina Sperimentale e Clinica, Universita di Firenze, Firenze, Italy
| | - B Maillère
- CEA-Saclay Institute of Biology and Technologies, Gif sur Yvette, France
| | - X Mariette
- INSERM, U1012, Hôpitaux Universitaires Paris Sud, Rhumatologie, Paris, France
| | - C Mauri
- Centre for Rheumatology Research, University College London, London, UK
| | - V Mikol
- Sanofi Aventis, Structural Biology, Paris, France
| | - D Mulleman
- University of Tours Francois Rabelais, CNRS UMR 7292, Tours, France
| | - J Oldenburg
- Institute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany
| | - G Paintaud
- CNRS UMR 7292 'GICC', Faculty of Medicine, Tours, France
| | | | - N Ruperto
- Istituto Giannina Gaslini, Pediatria II, Rheumatology, Genova, Italy
| | - R Seitz
- Division of Haematology/Transfusion Medicine, Paul-Ehrlich-Institut, Langen, Germany
| | - S Spindeldreher
- Drug Metabolism Pharmacokinetics-Biologics, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - F Deisenhammer
- Department of Neurology, Innsbruck Medical University, Innsbruck, Austria
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Abstract
In an attempt to elucidate the relationship and underlying processes of metal oxidation under stress, we combined the electrochemical characterisation with Density-Functional-Theory (DFT) calculations to interrogate the (100) surface of copper. The oxidised (100) surface shows a missing-row reconstruction, which is believed to be driven by surface stress. Hence, additional mechanical stimuli might have a significant impact on the onset of Cu oxidation. We find that different surface sites respond differently to strain. Oads at the thermodynamically favoured high-coordination hollow site (O coordinated to four Cu) is stabilised by up to 130 meV by imposing 2% tensile strain onto the surface, while the low-coordination top site (O coordinated to one Cu) shows a markedly different sensitivity. By cramping into the hollow site, Oads induces compressive stress into the (100) surface, an effect that is largely absent for the adsorption at the top site. We also find that the thermodynamic advantage of reconstructive underpotential surface oxidation is diminished under tensile strain. Hence, imposing tensile stress counter-balances the oxygen induced surface stress, which might have an implication on the onset of bulk copper oxidation. Studying Cu(100) single crystal surfaces in perchloric acid using cyclic voltammetry, we were able to confirm sensitivity of the electrochemical response towards the elastic strain.
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Affiliation(s)
- Denis Kramer
- Engineering Materials, Engineering Sciences, University of Southampton, Hants SO17 1BJ, UK
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Kramer D, Schön M, Bayerlová M, Bleckmann A, Schön MP, Zörnig M, Dobbelstein M. A pro-apoptotic function of iASPP by stabilizing p300 and CBP through inhibition of BRMS1 E3 ubiquitin ligase activity. Cell Death Dis 2015; 6:e1634. [PMID: 25675294 PMCID: PMC4669821 DOI: 10.1038/cddis.2015.17] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 12/27/2014] [Accepted: 01/02/2015] [Indexed: 12/26/2022]
Abstract
The p53 family and its cofactors are potent inducers of apoptosis and form a barrier to cancer. Here, we investigated the impact of the supposedly inhibitory member of the apoptosis-stimulating protein of p53, iASPP, on the activity of the p53 homolog TAp73, and its cofactors p300 and CBP. We found that iASPP interacted with and stabilized the histone acetyltransferase p300 and its homolog CBP upon cisplatin treatment. Vice versa, iASPP depletion by shRNA resulted in decreased amounts of p300 and CBP, impaired binding of p300 and TAp73 to target site promoters, reduced induction of pro-apoptotic TAp73 target genes, and impaired apoptosis. Mechanistically, we observed that the p300-regulatory E3 ubiquitin ligase BRMS1 could rescue the degradation of p300 and CBP in cisplatin-treated, iASPP-depleted cells. This argues that iASPP stabilizes p300 and CBP by interfering with their BRMS1-mediated ubiquitination, thereby contributing to apoptotic susceptibility. In line, iASPP overexpression partially abolished the interaction of BRMS1 and CBP upon DNA damage. Reduced levels of iASPP mRNA and protein as well as CBP protein were observed in human melanoma compared with normal skin tissue and benign melanocytic nevi. In line with our findings, iASPP overexpression or knockdown of BRMS1 each augmented p300/CBP levels in melanoma cell lines, thereby enhancing apoptosis upon DNA damage. Taken together, destabilization of p300/CBP by downregulation of iASPP expression levels appears to represent a molecular mechanism that contributes to chemoresistance in melanoma cells.
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Affiliation(s)
- D Kramer
- Department of Molecular Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - M Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - M Bayerlová
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - A Bleckmann
- Department of Hematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - M P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - M Zörnig
- Institute of Tumor Biology and Experimental Therapy, Georg Speyer Haus, Frankfurt am Main,Germany
| | - M Dobbelstein
- Department of Molecular Oncology, University Medical Center Göttingen, Göttingen, Germany
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Alshammari AS, Chi L, Chen X, Bagabas A, Kramer D, Alromaeh A, Jiang Z. Visible-light photocatalysis on C-doped ZnO derived from polymer-assisted pyrolysis. RSC Adv 2015. [DOI: 10.1039/c4ra17227b] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Heavy C-doping can effectively enhance visible-light absorption yet exhibited lower visible-light-responsive photocatalytic activity due to significant recombination of photogenerated charge carriers caused by C-dopant and oxygen vacancies.
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Affiliation(s)
- Ahmad S. Alshammari
- National Nanotechnology Research Center
- King Abdulaziz City for Science and Technology
- Riyadh 11442
- Saudi Arabia
| | - Lina Chi
- Faculty of Engineering and The Environment
- University of Southampton
- Southampton
- UK
- School of Environmental Science and Engineering
| | - Xiaoping Chen
- Faculty of Engineering and The Environment
- University of Southampton
- Southampton
- UK
- School of Environmental Science and Engineering
| | - Abdulaziz Bagabas
- National Nanotechnology Research Center
- King Abdulaziz City for Science and Technology
- Riyadh 11442
- Saudi Arabia
| | - Denis Kramer
- Faculty of Engineering and The Environment
- University of Southampton
- Southampton
- UK
| | - Abdulaziz Alromaeh
- National Nanotechnology Research Center
- King Abdulaziz City for Science and Technology
- Riyadh 11442
- Saudi Arabia
| | - Zheng Jiang
- Faculty of Engineering and The Environment
- University of Southampton
- Southampton
- UK
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Frankel G, Mauzeroll J, Thornton G, Bluhm H, Morrison J, Maurice V, Rayment T, Williams D, Cook A, Joshi G, Davenport A, Gibbon S, Kramer D, Acres M, Tautschnig M, Habazaki H, Marcus P, Shoesmith D, Wren C, Majchrowski T, Lindsay R, Wood M, Todorova M, Scully J, Renner F, Kokalj A, Taylor C, Virtanen S, Wharton J. Corrosion scales and passive films: general discussion. Faraday Discuss 2015; 180:205-32. [DOI: 10.1039/c5fd90045j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Stronks K, Droomers M, Jongeneel-Grimen B, Kramer D, Hoefnagels C, van Oers H, Kunst A. Health impact of area-based interventions in Dutch deprived neighbourhoods: the URBAN40 study. Eur J Public Health 2014. [DOI: 10.1093/eurpub/cku164.044] [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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Poot AM, Diercks GFH, Kramer D, Schepens I, Klunder G, Hashimoto T, Borradori L, Jonkman MF, Pas HH. Laboratory diagnosis of paraneoplastic pemphigus. Br J Dermatol 2014; 169:1016-24. [PMID: 23796242 DOI: 10.1111/bjd.12479] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2013] [Indexed: 01/02/2023]
Abstract
BACKGROUND Paraneoplastic pemphigus (PNP) is a multiorgan disease characterized by antibodies against plakins, desmogleins and the α2-macroglobulin-like-1 (A2ML1) protein, in association with an underlying neoplasm. Accurate diagnosis relies on the demonstration of these autoantibodies in serum. OBJECTIVES To evaluate the value of different laboratory techniques in the serological diagnosis of PNP. METHODS We performed immunoblotting, envoplakin (EP) enzyme-linked immunosorbent assay (ELISA), indirect immunofluorescence (IIF) on rat bladder, radioactive immunoprecipitation and a nonradioactive combined immunoprecipitation-immunoblot assay. Additional assays included BP180 ELISA and BP230 ELISA. We included the sera of 19 patients with PNP and 40 control subjects. RESULTS The sensitivities were 63% for anti-EP ELISA, 74% for rat bladder IIF, 89% for immunoblotting, 95% for radioactive immunoprecipitation and 100% for nonradioactive immunoprecipitation. Specificities ranged from 86% to 100%. The BP180 and BP230 ELISAs had low sensitivity and specificity for PNP. The combination of rat bladder IIF and immunoblot showed 100% sensitivity and specificity. The analysis of sequential PNP sera showed that antibody titres may decrease over time, possibly resulting in negative outcomes for EP ELISA and rat bladder IIF studies. CONCLUSIONS The detection of autoantibodies against EP and periplakin, or A2ML1 by immunoprecipitation is most sensitive for PNP. The combination of rat bladder IIF and immunoblotting is equally sensitive and highly specific, and represents an alternative valuable and relatively easy approach for the serological diagnosis of PNP.
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Affiliation(s)
- A M Poot
- Department of Dermatology, Center for Blistering Diseases, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
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Stelzer R, Lehmann H, Kramer D, Lüttge U. X-Ray Microprobe Analyses of Vacuoles of Spruce Needle Mesophyll, Endodermis and Transfusion Parenchyma Cells at Different Seasons of the Year*. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/j.1438-8677.1990.tb00183.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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47
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Klink R, Haschke HP, Kramer D, Lüttge U. Membrane Particles, Proteins and ATPase Activity of Tonoplast Vesicles ofMesembryanthemum crystallinumin the C-3 and CAM State*. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/j.1438-8677.1990.tb00121.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mariaux JB, Becker A, Kemna I, Ratajczak R, Fischer-Schliebs E, Kramer D, Lüttge U, Marigo G. Visualization by Freeze-Fracture Electron Microscopy of Intramembraneous Particles corresponding to the Tonoplast H+-Pyrophosphatase and H+-ATPase ofKalanchoë daigremontianaHamet et Perrier de la Bâthie*. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/j.1438-8677.1994.tb00802.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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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Kramer D, Stronks K, Maas J, Wingen M, Kunst AE. Social neighborhood environment and sports participation among Dutch adults: does sports location matter? Scand J Med Sci Sports 2014; 25:273-9. [PMID: 24506213 DOI: 10.1111/sms.12173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 12/09/2013] [Indexed: 11/28/2022]
Abstract
Studies on the relation between the social neighborhood environment and sports participation have produced inconsistent results. Use of generic sports outcomes may have obscured associations only apparent for sports at certain locations. This study aims to assess the association between the social neighborhood environment and three location-specific sports outcomes. Repeated cross-sectional data on sports participation (any type of sports, sports at indoor sports clubs, sports at outdoor sports clubs, sports on streets) were obtained from 20 600 adults using the Dutch national health survey 2006-2009. Data on neighborhood social safety and social capital were obtained using the Dutch Housing Research 2006. Over 40% of Dutch adults participated in any type of sports. Indoor sports clubs were most popular. Multilevel logistic regression analyses revealed that neighborhood social safety was positively associated with sports at indoor sports clubs [odds ratio (OR) = 1.25, 95% confidence interval (CI) = 1.06-1.48), but not with the other sports outcomes. Contrary, neighborhood social capital was positively associated with sports on streets only (OR = 1.69, 95% CI = 1.17-2.44). The results suggest that a positive social neighborhood environment enhances sports participation, but that this impact depends on the location of the sports activity. This study highlights the importance of using location-specific sports outcomes when assessing environmental determinants.
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Affiliation(s)
- D Kramer
- Department of Public Health, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
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