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Hilal M, Yang W, Hwang Y, Xie W. Tailoring MXene Thickness and Functionalization for Enhanced Room-Temperature Trace NO 2 Sensing. Nanomicro Lett 2024; 16:84. [PMID: 38214765 PMCID: PMC10786774 DOI: 10.1007/s40820-023-01316-x] [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] [Received: 08/30/2023] [Accepted: 12/05/2023] [Indexed: 01/13/2024]
Abstract
In this study, precise control over the thickness and termination of Ti3C2TX MXene flakes is achieved to enhance their electrical properties, environmental stability, and gas-sensing performance. Utilizing a hybrid method involving high-pressure processing, stirring, and immiscible solutions, sub-100 nm MXene flake thickness is achieved within the MXene film on the Si-wafer. Functionalization control is achieved by defunctionalizing MXene at 650 °C under vacuum and H2 gas in a CVD furnace, followed by refunctionalization with iodine and bromine vaporization from a bubbler attached to the CVD. Notably, the introduction of iodine, which has a larger atomic size, lower electronegativity, reduce shielding effect, and lower hydrophilicity (contact angle: 99°), profoundly affecting MXene. It improves the surface area (36.2 cm2 g-1), oxidation stability in aqueous/ambient environments (21 days/80 days), and film conductivity (749 S m-1). Additionally, it significantly enhances the gas-sensing performance, including the sensitivity (0.1119 Ω ppm-1), response (0.2% and 23% to 50 ppb and 200 ppm NO2), and response/recovery times (90/100 s). The reduced shielding effect of the -I-terminals and the metallic characteristics of MXene enhance the selectivity of I-MXene toward NO2. This approach paves the way for the development of stable and high-performance gas-sensing two-dimensional materials with promising prospects for future studies.
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Affiliation(s)
- Muhammad Hilal
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, Republic of Korea
| | - Woochul Yang
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea.
| | - Yongha Hwang
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, Republic of Korea.
| | - Wanfeng Xie
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea.
- School of Electronics & Information, University- Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao, 266071, China.
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Hilal M, Xie W, Yang W. Straw-sheaf-like Co 3O 4 for preparation of an electrochemical non-enzymatic glucose sensor. Mikrochim Acta 2022; 189:364. [PMID: 36045180 DOI: 10.1007/s00604-022-05453-9] [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: 05/12/2022] [Accepted: 08/09/2022] [Indexed: 11/30/2022]
Abstract
3D straw-sheaf-like cobalt oxide (SS-Co3O4) was prepared via the hydrothermal method and inert gas calcination of precursors without the assistance of any template or surfactant. It was composed of numerous nanoneedles with a length of ~ 8 µm and a diameter of ~ 30 nm strongly tied in the center. The SS-Co3O4 exhibited high crystallinity, a large surface area (39.01 m2.g-1), a smaller pore size (6 nm), and lower charge transfer resistance (Rct = 9.35 Ω) at the electrode/electrolyte interface. A non-enzymatic glucose oxidizing electrode fabricated with SS-Co3O4 showed a high sensitivity (669 µA.mM-1.cm-2), wide linear range (0.04-4.85 mM), low limit of detection (0.31 µM), good selectivity, fast response time (5 s), and high reproducibility with a relative standard deviation of 2.25%. In addition, its robust structure demonstrated excellent electrochemical stability by retaining 83.8% of the initial sensitivity when its current density vs. time response was measured for 75 min in bare electrolytes prior to the glucose-sensing test. Furthermore, it demonstrated excellent repeatability performance by retaining 87.0% of the initial sensitivity when a single electrode was tested for 4 cycles. The proposed robust structured 3D SS-Co3O4 electrode successfully responds to the content of glucose in human saliva, which substantially proves its suitability in practical application. The synthesis technique is advantageous to prepare other metal oxides with interesting morphology and robust structure for the development of more reliable non-enzymatic glucometers and other electrochemical devices.
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Affiliation(s)
- Muhammad Hilal
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea
| | - Wanfeng Xie
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea. .,College of Microtechnology & Nanotechnology, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao, 266071, China.
| | - Woochul Yang
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea.
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Hilal M, Yang W. A dual-functional flexible sensor based on defects-free Co-doped ZnO nanorods decorated with CoO clusters towards pH and glucose monitoring of fruit juices and human fluids. Nano Converg 2022; 9:14. [PMID: 35316419 PMCID: PMC8941038 DOI: 10.1186/s40580-022-00305-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/06/2022] [Indexed: 05/06/2023]
Abstract
Herein, ZnO nanorods were doped with Co and decorated with CoO clusters through an in situ technique to create a CoO/Co-doped ZnO (CO/CZO) heterostructure at low temperatures (150 °C) on a flexible PET substrate. In the CO/CZO heterostructure, the Co dopant has a low energy barrier to substitute Zn atoms and adsorb over oxygen atoms and their vacancies. Therefore, it decreased the charge density (ND = 2.64 × 1019 cm-3) on non-active sites of ZnO and lowered the charge transfer resistance (317 Ω) at Co-doped-ZnO/electrolyte interface by suppressing the native defects and reducing the Schottky barrier height (- 0.35 eV), respectively. Furthermore, CoO clusters induced a p-n heterostructure with Co-doped ZnO, prevented corrosion, increased the active sites for analyte absorption, and increased the ultimate tensile strength (4.85 N m-2). These characteristics enabled the CO/CZO heterostructure to work as a highly sensitive, chemically stable, and flexible pH and glucose oxidation electrode. Therefore, CO/CZO heterostructure was explored for pH monitoring in human fluids and fruit juices, demonstrating a near-Nernst-limit pH sensitivity (52 mV/pH) and fast response time (19 s) in each human fluid and fruit juice. Also, it demonstrated high sensitivity (4656 µM mM-1 cm-2), low limit of detection (0.15 µM), a broad linear range (0.04 mM to 8.85 mM) and good anti-interference capacity towards glucose-sensing. Moreover, it demonstrated excellent flexibility performances, retained 53% and 69% sensitivity of the initial value for pH and glucose sensors, respectively, after 500 bending, stretching, and warping cycles.
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Affiliation(s)
- Muhammad Hilal
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea
| | - Woochul Yang
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea.
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Hilal M, Han JI. Bi-functional carbon doped and decorated ZnO nanorods for enhanced pH monitoring of dairy milk and adsorption of hazardous dyes. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.03.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Parveen N, Hilal M, Han JI. Newly Design Porous/Sponge Red Phosphorus@Graphene and Highly Conductive Ni 2P Electrode for Asymmetric Solid State Supercapacitive Device With Excellent Performance. Nanomicro Lett 2020; 12:25. [PMID: 34138061 PMCID: PMC7770815 DOI: 10.1007/s40820-019-0360-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 12/01/2019] [Indexed: 05/20/2023]
Abstract
Supercapacitors have attracted much attention in the field of electrochemical energy storage. However, material preparation, stability, performance as well as power density limit their applications in many fields. Herein, a sponge-like red phosphorus@graphene (rP@rGO) negative electrode and a Ni2P positive electrode were prepared using a simple one-step method. Both electrodes showed excellent performances (294 F g-1 and 1526.6 F g-1 for rP@rGO and Ni2P, respectively), which seem to be the highest among all rP@rGO- and Ni2P-based electrodes reported so far. The asymmetric solid-state supercapacitor was assembled by sandwiching a gel electrolyte-soaked cellulose paper between rP@rGO and Ni2P as the negative and positive electrodes. Compared to other asymmetric devices, the device, which attained a high operating window of up to 1.6 V, showed high energy and power density values of 41.66 and 1200 W kg-1, respectively. It also has an excellent cyclic stability up to 88% after various consecutive charge/discharge tests. Additionally, the device could power commercial light emitting diodes and fans for 30 s. So, the ease of the synthesis method and excellent performance of the prepared electrode materials mat have significant potential for energy storage applications .
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Affiliation(s)
- Nazish Parveen
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
| | - Muhammad Hilal
- Flexible Display and Printed Electronic Lab, Department of Chemical and Biochemical Engineering, Dongguk University - Seoul, Seoul, 04620, Republic of Korea
| | - Jeong In Han
- Flexible Display and Printed Electronic Lab, Department of Chemical and Biochemical Engineering, Dongguk University - Seoul, Seoul, 04620, Republic of Korea.
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Hilal M, Han JI. Study of interface chemistry between the carrier-transporting layers and their influences on the stability and performance of organic solar cells. Appl Nanosci 2018. [DOI: 10.1007/s13204-018-0818-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Hossain MM, Islam MA, Shima H, Hasan M, Hilal M, Lee M. Recrystallization techniques for the synthesis of ZnO nanorods: an in situ process for carbon doping and enhancing the dispersion concentration of ZnO nanorods. RSC Adv 2018; 8:16927-16936. [PMID: 35540558 PMCID: PMC9080417 DOI: 10.1039/c8ra03016b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 04/08/2018] [Accepted: 05/02/2018] [Indexed: 12/02/2022] Open
Abstract
Zinc acetate is recrystallized as lumber-shaped tetragonal rods by a novel recrystallization technique. Subsequently, the recrystallized zinc acetate is converted into ZnO nanorods in a glass vial by the simplest and cheapest method without utilizing any expensive instrumentation. Carbon is doped in ZnO nanorods during the preparation ZnO nanorods without any extra steps, chemicals, or effort. The carbon-doped ZnO nanorods can be dispersed in a solvent at very high concentrations and are also stable for a very long time, which are comparatively higher than those of the other existing ZnO nanoparticles. The higher dispersion concentration and higher stability of ZnO nanoparticles are explained by a scheme that demonstrates the suspending mechanism of the ZnO nanoparticles at higher concentrations with higher stabilities in a solvent through the anchoring groups of carbon. No materials are used for surface modification; no surface coatings, ionic materials, or pH controlling materials are used to increase the dispersion concentration and stability. This is the first observation of the doped carbon playing a significant role in the dispersion of ZnO nanoparticles at higher concentrations by withholding them in the solvent. Therefore, doped carbon at the surface of ZnO nanoparticles prevents the self-aggregation of ZnO nanoparticles in the solution phase by interfacial barrier layers among ZnO nanorods and interfacial interactive layer between ZnO nanorod and solvent. Dispersed ZnO hexagonal nanorods in ethanol solvent and its interfacial behavior in this liquid phase.![]()
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Affiliation(s)
- Muhammad Mohsin Hossain
- Department of Energy and Materials Engineering, Dongguk University Seoul 04620 Republic of Korea 712-749
| | - Md Akherul Islam
- Department of Pharmacy, Atish Dipankar University of Science & Technology Banani Dhaka 1213 Bangladesh
| | - Hossain Shima
- Department of Chemistry, Rajshahi Univesity Rajshahi 6205 Bangladesh
| | - Mudassir Hasan
- Department of Chemical Engineering, King Khalid University Abha 61411 Kingdom of Saudi Arabia
| | - Muhammad Hilal
- Ghulam Ishaq Khan Institute of Engineering Sciences and Technology Topi Khyber Pakhtunkhwa Pakistan
| | - Moonyong Lee
- School of Chemical Engineering, Yeungnam University Gyeongsan 712-749 Republic of Korea
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Medina CD, Tracanna BC, Hilal M, González JA, Prado FE. Effect of solar UV‐B exclusion on the phytoplankton community in a sub‐tropical mountain reservoir: a mesocosm study. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1440-1770.2010.00440.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. D. Medina
- Estación de Fotobiología Playa Unión, Casilla de Correos N°153, Rawson, Chubut
| | - B. C. Tracanna
- Facultad de Ciencias Naturales e IML, Cátedra de Fisiología Vegetal, Cátedra de Diversidad Vegetal II, and Instituto de Limnología del Noroeste Argentino (ILINOA), Miguel Lillo 205, Tucumán
- Fundación Miguel Lillo, Laboratorio de Ecofisiología Vegetal, and Instituto de Ficología, Miguel Lillo 251, Tucumán, Argentina
| | - M. Hilal
- Facultad de Ciencias Naturales e IML, Cátedra de Fisiología Vegetal, Cátedra de Diversidad Vegetal II, and Instituto de Limnología del Noroeste Argentino (ILINOA), Miguel Lillo 205, Tucumán
| | - J. A. González
- Fundación Miguel Lillo, Laboratorio de Ecofisiología Vegetal, and Instituto de Ficología, Miguel Lillo 251, Tucumán, Argentina
| | - F. E. Prado
- Facultad de Ciencias Naturales e IML, Cátedra de Fisiología Vegetal, Cátedra de Diversidad Vegetal II, and Instituto de Limnología del Noroeste Argentino (ILINOA), Miguel Lillo 205, Tucumán
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Podazza G, Rosa M, González JA, Hilal M, Prado FE. Cadmium induces changes in sucrose partitioning, invertase activities, and membrane functionality in roots of Rangpur lime (Citrus limonia L. Osbeck). Plant Biol (Stuttg) 2006; 8:706-14. [PMID: 16883481 DOI: 10.1055/s-2006-924171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Cadmium (Cd) uptake effects on sucrose content, invertase activities, and plasma membrane functionality were investigated in Rangpur lime roots ( CITRUS LIMONIA L. Osbeck). Cadmium accumulation was significant in roots but not in shoots and leaves. Cadmium produced significant reduction in roots DW and increment in WC. Leaves and shoots did not show significant differences on both parameters. Sucrose content was higher in control roots than in Cd-exposed ones. Apoplastic sucrose content was much higher in Cd-exposed roots than in control ones. Cd-exposed roots showed a significant decrease in both cell wall-bound and cytoplasmic (neutral) invertase activities; while the vacuolar isoform did not show any change. Alterations in lipid composition and membrane fluidity of Cd-exposed roots were also observed. In Cd-exposed roots phospholipid and glycolipid contents decreased about 50 %, while sterols content was reduced about 22 %. Proton extrusion was inhibited by Cd. Lipid peroxidation and proton extrusion inhibition were also detected by histochemical analysis. This work's findings demonstrate that Cd affects sucrose partitioning and invertase activities in apoplastic and symplastic regions in Rangpur lime roots as well as the plasma membrane functionality and H (+)-ATPase activity.
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Affiliation(s)
- G Podazza
- Fundación Miguel Lillo, Area Botánica. Miguel Lillo 251 CP 4000 Tucumán, Argentina
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Hilal M, Zenoff AM, Ponessa G, Moreno H, Massa EM. Saline stress alters the temporal patterns of xylem differentiation and alternative oxidase expression in developing soybean roots. Plant Physiol 1998; 117:695-701. [PMID: 9625723 PMCID: PMC34990 DOI: 10.1104/pp.117.2.695] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/1997] [Accepted: 03/23/1998] [Indexed: 05/20/2023]
Abstract
We conducted a coordinated biochemical and morphometric analysis of the effect of saline conditions on the differentiation zone of developing soybean (Glycine max L.) roots. Between d 3 and d 14 for seedlings grown in control or NaCl-supplemented medium, we studied (a) the temporal evolution of the respiratory alternative oxidase (AOX) capacity in correlation with the expression and localization of AOX protein analyzed by tissue-print immunoblotting; (b) the temporal evolution and tissue localization of a peroxidase activity involved in lignification; and (c) the structural changes, visualized by light microscopy and quantified by image digitization. The results revealed that saline stress retards primary xylem differentiation. There is a corresponding delay in the temporal pattern of AOX expression, which is consistent with the xylem-specific localization of AOX protein and the idea that this enzyme is linked to xylem development. An NaCl-induced acceleration of the development of secondary xylem was also observed. However, the temporal pattern of a peroxidase activity localized in the primary and secondary xylem was unaltered by NaCl treatment. Thus, the NaCl-stressed root was specifically affected in the temporal patterns of AOX expression and xylem development.
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Hilal M, Castagnaro A, Moreno H, Massa EM. Specific localization of the respiratory alternative oxidase in meristematic and xylematic tissues from developing soybean roots and hypocotyls. Plant Physiol 1997; 115:1499-503. [PMID: 9414560 PMCID: PMC158615 DOI: 10.1104/pp.115.4.1499] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We used tissue printing and specific immunostaining to examine the localization of the alternative oxidase (AOX) protein in correlation with measurements of AOX capacity. Selected root and hypocotyl regions were analyzed during the first 14 d of growth. It is shown that AOX protein is localized in the apical meristem and in developing xylem. The temporal pattern of expression is coincident with the evolution of AOX capacity. Data suggest that AOX expression is linked to xylem differentiation. Since heat is a major product of the alternative pathway, we speculate that thermogenesis is implicated in morphogenesis.
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Affiliation(s)
- M Hilal
- Departamento Bioquímica de la Nutrición, Consejo Nacional de Investigaciones Cientificas y Tecnológicas-Universidad Nacional de Tucumán, Argentina
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Hilal M, Piguet V, Schmitt B. [Rural communes and small towns in the urban hierarchy]. Econ Stat 1995:21-36, 95-9. [PMID: 12290245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
"A determining factor in the demographic and employment dynamics of rural communes and certain small towns [in France] is how far they are from the nearest large town. Demographic dynamics and employment trends are somewhat adverse for those living far from urban influences. The main reasons for this would appear to be the slump in agriculture. This said, demographic and employment trends are much improved nearer the large towns, especially since the towns exerting the influence have more inhabitants." (SUMMARY IN ENG AND GER AND SPA)
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Hilal M. [Oral contraception and carbohydrate metabolism: III--practical implications]. Contracept Fertil Sex (Paris) 1986; 14:59-62. [PMID: 12341242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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Hilal M. [Oral contraception and carbohydrate metabolism--the physiopathological explanation]. Contracept Fertil Sex (Paris) 1985; 13:1213-7. [PMID: 12267513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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Boulos TR, Messawarti AA, Hilal M. Comparative flotation activity of some local petroleum sulphonates. TENSIDE SURFACT DET 1979. [DOI: 10.1515/tsd-1979-160204] [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: 11/15/2022]
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