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Cerium-Copper Oxides Synthesized in a Multi-Inlet Vortex Reactor as Effective Nanocatalysts for CO and Ethene Oxidation Reactions. Catalysts 2022. [DOI: 10.3390/catal12040364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, a set of CuCeOx catalysts was prepared via the coprecipitation method using a Multi-Inlet Vortex Reactor: the Cu wt.% content is 5, 10, 20, 30 and 60. Moreover, pure CeO2 and CuO were synthesized for comparison purposes. The physico-chemical properties of this set of samples were investigated by complementary techniques, e.g., XRD, N2 physisorption at −196 °C, Scanning Electron Microscopy, XPS, FT-IR, Raman spectroscopy and H2-TPR. Then, the CuCeOx catalysts were tested for the CO and ethene oxidation reactions. As a whole, all the prepared samples presented good catalytic performances towards the CO oxidation reaction (1000 ppm CO, 10 vol.% O2/N2): the most promising catalyst was the 20%CuCeOx (complete CO conversion at 125 °C), which exhibited a long-term thermal stability. Similarly, the oxidative activity of the catalysts were evaluated using a gaseous mixture containing 500 ppm C2H4, 10 vol.% O2/N2. Accordingly, for the ethene oxidation reaction, the 20%CuCeOx catalyst evidenced the best catalytic properties. The elevated catalytic activity towards CO and ethene oxidation was mainly ascribed to synergistic interactions between CeO2 and CuO phases, as well as to the high amount of surface-chemisorbed oxygen species and structural defects.
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Kurajica S, Ivković IK, Dražić G, Shvalya V, Duplančić M, Matijašić G, Cvelbar U, Mužina K. Phase composition, morphology, properties and improved catalytic activity of hydrothermally-derived manganese-doped ceria nanoparticles. NANOTECHNOLOGY 2022; 33:135709. [PMID: 34929680 DOI: 10.1088/1361-6528/ac44ed] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Manganese-doped ceria nanoparticles were prepared by hydrothermal synthesis and the prepared samples were thermally treated at 500 °C for 2 h. The samples were investigated using x-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive x-ray spectroscopy (EDS), N2adsorption and x-ray photoelectron spectroscopy (XPS). XRD revealed that nanocrystalline ceria is the main phase in all samples, while a romanechite-like phase (Na2Mn5O10) appears in the sample doped with 30% of Mn. TEM coupled with EDS exposed the presence of the same phase in the sample doped with 20% Mn. While ceria particles have spherical morphology and particle size ranging from 4.3 to 9.2 nm, the rare crystals of the romanechite-like phase adopt a tubular morphology with a length of at least 1μm. However, the decrease in the ceria lattice constant and the EDS spectra of the ceria nanoparticles clearly indicate that a substantial amount of manganese entered the ceria crystal lattice. Manganese doping has a beneficial impact on the specific surface area of ceria. XPS measurements reveal a decrease in the Ce3+/Ce3+ + Ce4+content in the doped samples which is replaced by Mn3+. Moreover, a drastic increase in adsorbed oxygen is observed in the doped samples which is the consequence of the increase in Mn3+species that promotes oxygen migrations to the surface of the sample. Compared to the pure sample, the doped samples showed significantly higher catalytic activity for the process of toluene oxidation.
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Affiliation(s)
- S Kurajica
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10 000 Zagreb, Croatia
| | - I K Ivković
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10 000 Zagreb, Croatia
| | - G Dražić
- National Institute of Chemistry, Hajdrihova 19, SI-1001, Ljubljana, Slovenia
| | - V Shvalya
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - M Duplančić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10 000 Zagreb, Croatia
| | - G Matijašić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10 000 Zagreb, Croatia
| | - U Cvelbar
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - K Mužina
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10 000 Zagreb, Croatia
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Qi Y, Li C, Li H, Yang H, Guan J. Elimination or Removal of Ethylene for Fruit and Vegetable Storage via Low-Temperature Catalytic Oxidation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:10419-10439. [PMID: 34463513 DOI: 10.1021/acs.jafc.1c02868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ethylene acts as an important hormone to trigger the ripening and senescence of fruits and vegetables (F&V). Thus, it is essential to eliminate trace ethylene and prevent F&V losses effectively. There are several technologies currently applying to control the ethylene concentration in the storage and transportation environment, including adsorption, gene modification, oxidation, etc. These protocols will be compared, and special attention will be paid to the low-temperature catalytic oxidation that has already been applied to practical production in this review. The active sites, supports, and reaction and deactivation mechanism of the catalysts for the low-temperature ethylene oxidation will be discussed and evaluated systematically to provide new insights for the development of effective catalysts, along with the suggestion of some perspectives for future research on this important catalytic system for F&V preservation.
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Affiliation(s)
- Ying Qi
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Chunli Li
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Hao Li
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Huaming Yang
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Junfeng Guan
- Institute of Genetics and Physiology, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei 050051, People's Republic of China
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Abstract
A Gasoline Particulate Filter (GPF) can be an effective solution to abate the particulate matter produced in modern direct injection gasoline engines. The regeneration of this system is critical, since it occurs in oxygen deficiency, but it can be promoted by placing an appropriate catalyst on the filter walls. In this paper, a nanostructured equimolar ceria-praseodymia catalyst, obtained via hydrothermal synthesis, was characterized with complementary techniques (XRD, N2-physisorption, FESEM, XPS, Temperature Programmed Reduction, etc.) and its catalytic performances were investigated in low oxygen availability. Pr-doping significantly affected ceria structure and morphology, and the weakening of the cerium–oxygen bond associated to Pr insertion resulted in a high reducibility. The catalytic activity was explored considering different reactions, namely CO oxidation, ethylene and propylene total oxidation, and soot combustion. Thanks to its capability of releasing active oxygen species, ceria-praseodymia exhibited a remarkable activity and CO2-selectivity at low oxygen concentrations, proving to be a promising catalyst for coated GPFs.
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Comparative study of Co-rich and Ce-rich oxide nanocatalysts (CoxCe1−xOy) for low-temperature total oxidation of methanol. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.03.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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He C, Cheng J, Zhang X, Douthwaite M, Pattisson S, Hao Z. Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources. Chem Rev 2019; 119:4471-4568. [DOI: 10.1021/acs.chemrev.8b00408] [Citation(s) in RCA: 769] [Impact Index Per Article: 153.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chi He
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, P.R. China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Jie Cheng
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Xin Zhang
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Mark Douthwaite
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Samuel Pattisson
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Zhengping Hao
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
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Assadian E, Zarei MH, Gilani AG, Farshin M, Degampanah H, Pourahmad J. Toxicity of Copper Oxide (CuO) Nanoparticles on Human Blood Lymphocytes. Biol Trace Elem Res 2018; 184:350-357. [PMID: 29064010 DOI: 10.1007/s12011-017-1170-4] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
Abstract
CuO nanoparticles (CuO-NPs) serve several important functions in human life, particularly in the fields of medicine, engineering, and technology. These nanoparticles have been utilized as catalysts, semiconductors, sensors, gaseous and solid ceramic pigments, and magnet rotatable devices. Further use for CuO-NPs has been employed in the pharmaceutical industry especially in the production of anti-microbial fabric treatments or prevention of infections caused by Escherichia coli and methicillin-resistant Staphylococcus aureus. Two key potential routes of exposure to CuO-NPs exist through inhalation and skin exposure. Toxicity of these nanoparticles has been reported in various studies; however, no study as of yet has investigated the complete cellular mechanisms involved in CuO-NPs toxicity on human cells. The aim of this study was to determine the cytotoxicity of CuO-NPs on human blood lymphocytes. Blood lymphocytes were obtained from healthy male subjects through the use of Ficoll polysaccharide subsequently by gradient centrifugation. The following parameters were assayed in blood lymphocytes after a 6-h incubation with different concentrations of CuO-NPs: cell viability, reactive oxygen species (ROS) formation, lipid peroxidation, cellular glutathione levels, and mitochondrial and lysosomal damage. Our results demonstrate that CuO-NPs, in particular, decreased cell viability in a concentration-dependent manner and the IC50 determined was 382 μM. CuO-NP cytotoxicity was associated with significant increase at intracellular ROS level and loss of mitochondrial membrane potential and lysosomal membrane leakiness. Hence, CuO-NPs are shown to effectively induce oxidative stress in addition to inflict damage on mitochondria and lysosomes in human blood lymphocytes.
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Affiliation(s)
- Evelyn Assadian
- Department of Chemistry, Faculty of Science, Guilan University, Guilan, P. O. Box: 41335-1914, Rasht, Iran
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, P.O. Box 14155-6153, Tehran, Iran
| | - Mohammad Hadi Zarei
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, P.O. Box 14155-6153, Tehran, Iran
| | - Ali Ghanadzadeh Gilani
- Department of Chemistry, Faculty of Science, Guilan University, Guilan, P. O. Box: 41335-1914, Rasht, Iran
| | - Mehrzad Farshin
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, P.O. Box 14155-6153, Tehran, Iran
| | - Hamid Degampanah
- Department of Chemistry, Faculty of Science, Guilan University, Guilan, P. O. Box: 41335-1914, Rasht, Iran.
| | - Jalal Pourahmad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, P.O. Box 14155-6153, Tehran, Iran.
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Chen X, Xu Q, Zhou Y, Zhu Q, Huang H, Pan Z, Zhang P, Dai S, Lu H. Facile and Flexible Preparation of Highly Active CuCe Monolithic Catalysts for VOCs Combustion. ChemistrySelect 2017. [DOI: 10.1002/slct.201701850] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiao Chen
- College of environment; Zhejiang University of Technology; Hangzhou 310014 China
| | - Qinqi Xu
- College of environment; Zhejiang University of Technology; Hangzhou 310014 China
| | - Ying Zhou
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014 China
| | - Qiulian Zhu
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014 China
| | - Haifeng Huang
- College of environment; Zhejiang University of Technology; Hangzhou 310014 China
| | - Zhiyan Pan
- College of environment; Zhejiang University of Technology; Hangzhou 310014 China
| | - Pengfei Zhang
- Chemical Sciences Division; Oak Ridge National Laboratory; Oak Ridge Tennessee 37831 USA
| | - Sheng Dai
- Chemical Sciences Division; Oak Ridge National Laboratory; Oak Ridge Tennessee 37831 USA
| | - Hanfeng Lu
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014 China
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Suh MJ, Park YK, Ihm SK. One-pot synthesis of perovskite-type metal oxides via confined mesopore and their catalytic activity for toluene oxidation. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.08.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Chojnacka A, Molenda M, Chmielarz L, Piwowarska Z, Gajewska M, Dudek B, Dziembaj R. Ceria based novel nanocomposites catalysts MnxCe1−xO2/α-Al2O3 for low-temperature combustion of methanol. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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He C, Liu X, Shi J, Ma C, Pan H, Li G. Anionic starch-induced Cu-based composite with flake-like mesostructure for gas-phase propanal efficient removal. J Colloid Interface Sci 2015; 454:216-25. [DOI: 10.1016/j.jcis.2015.05.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 05/01/2015] [Accepted: 05/11/2015] [Indexed: 10/23/2022]
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12
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Carabineiro S, Chen X, Konsolakis M, Psarras A, Tavares P, Órfão J, Pereira M, Figueiredo J. Catalytic oxidation of toluene on Ce–Co and La–Co mixed oxides synthesized by exotemplating and evaporation methods. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.06.018] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Amadine O, Maati H, Abdelouhadi K, Fihri A, El Kazzouli S, Len C, El Bouari A, Solhy A. Ceria-supported copper nanoparticles: A highly efficient and recyclable catalyst for N-arylation of indole. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.08.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Özel RE, Wallace KN, Andreescu S. Alterations of intestinal serotonin following nanoparticle exposure in embryonic zebrafish. ENVIRONMENTAL SCIENCE. NANO 2014; 2014:27-36. [PMID: 24639893 PMCID: PMC3951830 DOI: 10.1039/c3en00001j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The increased use of engineered nanoparticles (NPs) in manufacturing and consumer products raises concerns about the potential environmental and health implications on the ecosystem and living organisms. Organs initially and more heavily affected by environmental NPs exposure in whole organisms are the skin and digestive system. We investigate the toxic effect of two types of NPs, nickel (Ni) and copper oxide (CuO), on the physiology of the intestine of a living aquatic system, zebrafish embryos. Embryos were exposed to a range of Ni and CuO NP concentrations at different stages of embryonic development. We use changes in the physiological serotonin (5HT) concentrations, determined electrochemically with carbon fiber microelectrodes inserted in the live embryo, to assess this organ dysfunction due to NP exposure. We find that exposure to both Ni and CuO NPs induces changes in the physiological 5HT concentration that varies with the type, exposure period and concentration of NPs, as well as with the developmental stage during which the embryo is exposed. These data suggest that exposure to NPs might alter development and physiological processes in living organisms and provide evidence of the effect of NPs on the physiology of the intestine.
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Affiliation(s)
- Rıfat Emrah Özel
- Department of Chemistry and Biomolecular Science, Clarkson University, 8 Clarkson Ave. Potsdam, NY, 13699-5810, USA
| | - Kenneth N. Wallace
- Department of Biology, Clarkson University, 8 Clarkson Ave. Potsdam, NY, 13699-5805, USA
| | - Silvana Andreescu
- Department of Chemistry and Biomolecular Science, Clarkson University, 8 Clarkson Ave. Potsdam, NY, 13699-5810, USA
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Shen C, Wang YJ, Xu JH, Wang K, Luo GS. Size control and catalytic activity of highly dispersed Pd nanoparticles supported on porous glass beads. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:7519-7527. [PMID: 22482775 DOI: 10.1021/la300825s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper presents a novel in situ method to prepare monodispersed palladium nanoparticles supported on porous glass beads with an egg-shell structure at room temperature. This method integrates two processes of ion exchange and reduction in one step just by changing the solvent from water to alcohol. The monodispersed Pd nanoparticles around 3.75 nm in diameter with a face-centered cubic structure have been successfully prepared. The adsorption capacity for palladium reached 55.00 ± 0.55 mg/g in ethanol, which was 26 times larger than that in water. These Pd nanoparticles supported on porous glass beads showed an excellent catalytic performance through the hydrogenation of cyclohexene. In addition, this in situ method was also successfully applied to prepare monodispersed silver and gold nanoparticles supported on porous glass beads. Overall, this facile method provided an alternative for preparing a supported nanoparticle catalyst in a green way.
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Affiliation(s)
- C Shen
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, People's Republic of China
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Total oxidation of selected mono-carbon VOCs over hydrotalcite originated metal oxide catalysts. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2011.10.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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