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Sabir SS, Din HU, Ahmad S, Alam Q, Sardar S, Amin B, Farooq M, Nguyen CQ, Nguyen CV. Correction: Theoretical prediction of the electronic structure, optical properties and photocatalytic performance of type-I SiS/GeC and type-II SiS/ZnO heterostructures. RSC Adv 2023; 13:10957. [PMID: 37033435 PMCID: PMC10077341 DOI: 10.1039/d3ra90032k] [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] [Received: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 04/11/2023] Open
Abstract
[This corrects the article DOI: 10.1039/D3RA01061A.].
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Affiliation(s)
- S S Sabir
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - H U Din
- Computational Science Research Center, Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea
- Department of Physics, Bacha Khan University Charsadda KP Pakistan
| | - Sheraz Ahmad
- School of Materials Science and Engineering, Institute of New Energy Material Chemistry, Nankai University Tianjin 300350 P. R. China
| | - Q Alam
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - S Sardar
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - B Amin
- Department of Physics, Abbottabad University of Science & Technology Havelian Abbottabad KP Pakistan
| | - M Farooq
- Department of Physics, Bacha Khan University Charsadda KP Pakistan
| | - Cuong Q Nguyen
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam
- Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Chuong V Nguyen
- Department of Materials Science and Engineering, Le Quy Don Technical University Hanoi Vietnam
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Ullah SS, Din HU, Ahmad S, Alam Q, Sardar S, Amin B, Farooq M, Nguyen CQ, Nguyen CV. Theoretical prediction of the electronic structure, optical properties and photocatalytic performance of type-I SiS/GeC and type-II SiS/ZnO heterostructures. RSC Adv 2023; 13:7436-7442. [PMID: 36895771 PMCID: PMC9990377 DOI: 10.1039/d3ra01061a] [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] [Received: 02/16/2023] [Accepted: 02/27/2023] [Indexed: 03/09/2023] Open
Abstract
Nowadays, it would be ideal to develop high-performance photovoltaic devices as well as highly efficient photocatalysts for the production of hydrogen via photocatalytic water splitting, which is a feasible and sustainable energy source for addressing the challenges related to environmental pollution and a shortage of energy. In this work, we employ first-principles calculations to investigate the electronic structure, optical properties and photocatalytic performance of novel SiS/GeC and SiS/ZnO heterostructures. Our results indicate that both the SiS/GeC and SiS/ZnO heterostructures are structurally and thermodynamically stable at room temperature, suggesting that they are promising materials for experimental implementation. The formation of SiS/GeC and SiS/ZnO heterostructures gives rise to reduction of the band gaps as compared to the constituent monolayers, enhancing the optical absorption. Furthermore, the SiS/GeC heterostructure possesses a type-I straddling gap with a direct band gap, while the SiS/ZnO heterostructure forms a type-II band alignment with indirect band gap. Moreover, a red-shift (blue-shift) has been observed in SiS/GeC (SiS/ZnO) heterostructures as compared with the constituent monolayers, enhancing the efficient separation of photogenerated electron-hole pairs, thereby making them promising candidates for optoelectronic applications and solar energy conversion. More interestingly, significant charge transfers at the interfaces of SiS-ZnO heterostructures, have improved the adsorption of H, and the Gibbs free energy ΔH* becomes close to zero, which is optimal for the hydrogen evolution reaction to produce hydrogen. The findings pave the path for the practical realization of these heterostructures for potential applications in photovoltaics and photocatalysis of water splitting.
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Affiliation(s)
- S S Ullah
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - H U Din
- Computational Science Research Center, Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea .,Department of Physics, Bacha Khan University Charsadda KP Pakistan
| | - Sheraz Ahmad
- School of Materials Science and Engineering, Institute of New Energy Material Chemistry, Nankai University Tianjin 300350 P. R. China
| | - Q Alam
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - S Sardar
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - B Amin
- Department of Physics, Abbottabad University of Science & Technology Havelian Abbottabad KP Pakistan
| | - M Farooq
- Department of Physics, Bacha Khan University Charsadda KP Pakistan
| | - Cuong Q Nguyen
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Chuong V Nguyen
- Department of Materials Science and Engineering, Le Quy Don Technical University Hanoi Vietnam
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Rameshkumar A, Sardar S, Majumder B, Dey S, Kazmi SI. Observation of bee pollinators (Apoidea) on a medicinal plant, Lippia alba (Mill.) (Verbenaceae). CURR SCI INDIA 2022. [DOI: 10.18520/cs/v123/i5/703-707] [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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Alam Q, Sardar S, Din HU, Khan SA, Idrees M, Amin B, Rehman F, Muhammad S, Laref A. A first principles study of a van der Waals heterostructure based on MS 2 (M = Mo, W) and Janus CrSSe monolayers. Nanoscale Adv 2022; 4:3557-3565. [PMID: 36134356 PMCID: PMC9400489 DOI: 10.1039/d2na00298a] [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] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/02/2022] [Indexed: 06/16/2023]
Abstract
The strategy of stacking two-dimensional materials for designing van der Waals heterostructures has gained tremendous attention in realizing innovative device applications in optoelectronics and renewable energy sources. Here, we performed the first principles calculations of the geometry, optoelectronic and photocatalytic performance of MS2-CrSSe (M = Mo, W) vdW heterostructures. The mirror asymmetry in the Janus CrSSe system allows the designing of two models of the MS2-CrSSe system by replacing S/Se atoms at opposite surfaces in CrSSe. The feasible configurations of both models of the MS2-CrSSe system are found energetically, dynamically and thermally stable. The studied heterobilayers possess an indirect type-I band alignment, indicating that the recombination of photogenerated electrons and holes in the CrSSe monolayer is hence crucial for photodetectors and laser applications. Remarkably, a red-shift in the optical absorption spectra of MS2-CrSSe makes them potential candidates for light harvesting applications. More interestingly, all heterobilayers (except W(Mo)S2-CrSSe of model-I(II)) reveal appropriate band edge positions of the oxidation and reduction potentials of the photocatalysis of water dissociation into H+/H2 and O2/H2O at pH = 0. These results shed light on the practical design of the MS2-CrSSe system for efficient optoelectronic and photocatalytic water splitting applications.
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Affiliation(s)
- Q Alam
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - S Sardar
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - H U Din
- Department of Physics, Bacha Khan University Charsadda KP Pakistan
| | - S A Khan
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - M Idrees
- Department of Physics, Abbottabad University of Science & Technology Havelian Abbottabad KP Pakistan
| | - B Amin
- Department of Physics, Abbottabad University of Science & Technology Havelian Abbottabad KP Pakistan
| | - F Rehman
- Department of Physics, Khushal Khan Khattak University Karak KP Pakistan
| | - Saleh Muhammad
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - A Laref
- Department of Physics and Astronomy, College of Science, King Saud University Riyadh 11451 Saudi Arabia
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Ali F, Gul S, Sabir MS, Shakeela Q, Rasheed A, Andleeb F, Ullah A, Sardar S, Ahmed S. Comparative in vitro activity of selected antibacterial agents against Escherichia coli isolated from hospitalized patients suffering UTI. Pak J Pharm Sci 2022; 35:487-492. [PMID: 35642404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Escherichia coli is the most studied among those bacteria causing urinary tract infections. This study was aimed to find out antibacterial activity and minimum inhibitory concentration of selected antibacterial agents against E. coli isolates of hospitalized UTI patients. The specimens were inoculated on Eosin Methylene Blue medium. E. coli isolates were identified via colonial morphology, biochemical testing and API-20 kit. The susceptibility pattern of antibacterial agents was determined applying disc diffusion method (Kirby-Bauer) and dilution tube method. Among all, 38.82% (n=158/407) specimens were positive for E. coli, while the rest showed either no growth or exhibited colonies other than E. coli. while observing the susceptibility pattern, Imipenem was found the most effective (73.42%) antibacterial agent, followed by nitrofurantoin (52.53%), cefpirome (44.94%) and tazobactam/ piperacillin (44.94%), whereas the E. coli isolates were highly resistant to sulfamethoxazole/trimethoprim (71.52%), followed by Amoxicillin-clavulanic acid (67.72%), nalidixic acid (66.46%) and Tobramycin (62.03%), when tested by disc diffusion method. The isolates were susceptible to cefpirome (39.87%) and tobramycin (39.87%) and resistant to sulfamethoxazole/trimethoprim (75.32%), followed by levofloxacin (61.39%), when tested by tube dilution method. The study concluded high degree of resistance against Sulfamethoxazole/trimethoprim, in contrast, cephalosporin and Imipenem exhibited good potency which can be recommended for UTI.
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Affiliation(s)
- Farooq Ali
- Department of Microbiology, Hazara University, Mansehra, Pakistan
| | - Saira Gul
- Department of Microbiology, Hazara University, Mansehra, Pakistan
| | | | - Qismat Shakeela
- Department of Microbiology, Abbottabad University of Science and Technology, Abbottabad, Pakistan
| | - Atia Rasheed
- Department of Microbiology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Farah Andleeb
- Department of Microbiology, Hazara University, Mansehra, Pakistan
| | - Anwar Ullah
- Department of Microbiology, Hazara University, Mansehra, Pakistan
| | - Saiqa Sardar
- Malaria Research Laboratory, Institute Oswaldo Cruz-Fiocruz, Rio de Janeiro, Brazil
| | - Shehzad Ahmed
- Department of Microbiology, Hazara University, Mansehra, Pakistan
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Sardar S, Pal S, Mishra R. A randomized controlled trial of restricted versus standard fluid management in late preterm and term infants with transient tachypnea of the newborn. J Neonatal Perinatal Med 2021; 13:477-487. [PMID: 32444567 DOI: 10.3233/npm-190400] [Citation(s) in RCA: 2] [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] [Indexed: 11/15/2022]
Abstract
BACKGROUND Transient tachypnea of the newborn(TTNB) is the most common respiratory morbidity in late preterm and term babies and is pathophysiologically related to delayed lung fluid clearance after birth. Mimicking low physiological fluid intake in the initial period of life may accelerate the recovery from TTNB. In a randomized controlled trial, we compared the roles of restricted versus standard fluid management in babies with TTNB requiring respiratory support. METHODS This parallel group,non-blinded, stratified randomized controlled trial was conducted in a level III neonatal unit of eastern India. Late preterm and term babies with TTNB requiring continuous positive airway pressure (CPAP) were randomly allocated to standard and restricted fluid arms for the first 72 hours (hrs). Primary outcome was CPAP duration. RESULTS In total, 100 babies were enrolled in this study with 50 babies in each arm. CPAP duration was significantly less in the restricted arm (48[42, 54] hrs vs 54[48,72] hrs, p = 0.002). However, no difference was observed in the incidence of CPAP failure between the two arms. In the subgroup analysis, the benefit of reduced CPAP duration persisted in late preterm but not in term infants. However, the effect was not significant in the late preterm babies exposed to antenatal steroid. CONCLUSION This trial demonstrated the safety and effectiveness of restrictive fluid strategy in reducing CPAP duration in late preterm and term babies with TTNB. Late preterm babies, especially those not exposed to antenatal steroid were the most benefitted by this strategy.
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Affiliation(s)
- S Sardar
- Department of Neonatology, Institute of Post Graduate Medical Education & Research, Kolkata, India
| | - S Pal
- Department of Neonatology, Institute of Post Graduate Medical Education & Research, Kolkata, India
| | - R Mishra
- Department of Physiology, Ananda Mohan College, University of Calcutta, Kolkata, India
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Sardar S, Javanmard M. Tissue Paper as a Substrate for Electronic Biosensing. Annu Int Conf IEEE Eng Med Biol Soc 2019; 2019:6045-6048. [PMID: 31947224 DOI: 10.1109/embc.2019.8857451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the presented work, we combine a commonplace commodity, tissue paper, with biosensing capabilities to provide on-the-go detection of biomarkers. We developed a simple light-weight sensor using single walled carbon nanotubes (SWCNT) on commercially available tissue paper. As a proof of concept, we show that these sensors can be used to quantify Interleukin-6 protein concentration. Detection is carried out by examining the modulation in electrical properties of the substrate induced by addition of protein on these sensors. Our results show that these sensors can provide the foundation for development of tissue paper based portable sensors for biomarkers relevant to on-the-go testing.
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Carmichael PL, Sardar S, Crooks N, Neven P, Van Hoof I, Ugwumadu A, Bourne T, Tomas E, Hellberg P, Hewer AJ, Phillips DH. Lack of evidence from HPLC 32P-post-labelling for tamoxifen-DNA adducts in the human endometrium. Carcinogenesis 1999; 20:339-42. [PMID: 10069474 DOI: 10.1093/carcin/20.2.339] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Tamoxifen is associated with an increased incidence of endometrial cancer in women. It is also a potent carcinogen in rat liver and forms covalent DNA adducts in this tissue. A previous study exploring DNA adducts in human endometria, utilizing thin layer chromatography 32P-postlabelling, found no evidence for adducts in tamoxifen-treated women [Carmichael,P.L., Ugwumadu,A.H.N., Neven,P., Hewer,A.J., Poon,G.K. and Phillips,D.H. (1996) Cancer Res., 56, 1475-1479]. However, subsequent work utilizing HPLC 32P-post-labelling [Hemminki,K., Ranjaniemi,H., Lindahl,B. and Moberger,B. (1996) Cancer Res., 56, 4374-4377] suggested that very low levels could be detected. We have sought to investigate this question further by reproducing the HPLC methodology at two centres, and analysing endometrial DNA from 20 patients treated with 20 mg/day tamoxifen for between 22 and 65 months. Liver DNA isolated from tamoxifen-treated rats was used as a positive control. We found no convincing evidence for tamoxifen-derived DNA adducts in human endometrium. HPLC elution profiles of post-labelled DNA from tamoxifen-treated women were indistinguishable from those obtained with DNA from 14 untreated women and from six women taking toremifene, an analogue of tamoxifen.
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Affiliation(s)
- P L Carmichael
- Imperial College School of Medicine, Division of Biomedical Sciences, Molecular Toxicology, London, UK.
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Rana MP, Sardar S, Chatterjee M. Selenomethionine in the inhibition of a transplantable murine lymphoma: reflection on hepatic drug metabolizing enzymes. Tumour Biol 1996; 17:102-9. [PMID: 8658012 DOI: 10.1159/000217973] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
This study attempts to determine whether selenomethionine treatment can improve the survival time of mice inoculated with Dalton's lymphoma (DL) and thereby to identify phase/phases of the neoplastic processes at which selenium exerts its maximal action as an anticancer agent. Accordingly, a maximum of 30.76 and 143% increase in survival was brought about by treatment of selenomethionine prior to lymphoma transplantation, in comparison to mice receiving selenomethione supplementation concurrently with inoculation of DL, and those tumor-bearing mice receiving no supplementation, respectively. Beneficiality of selenomethionine has also been studied by monitoring the continuous changes brought about by this compound on hepatic total cytochrome P-450 and b5 content, NADPH cytochrome c reductase, UDP glucuronyl transferase and glutathione S-transferase (GST) activities. These are important biotransformation enzymes and are altered significantly in neoplasia. The drastic increase in all the markers studied, excepting GST, was effectively counteracted by selenomethionine treatment (more before than concurrently), which sufficiently delayed and controlled the increase in those xenobiotic indices. The 112 and 78.78% induction in GST activity brought about by prior and concurrent treatment of selenomethionine, respectively, confirms the fact that inducers of GSTs are often antitumorigenic.
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Affiliation(s)
- M P Rana
- Department of Pharmaceutical Technology, Jadavpur University, Calcutta, India
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Sardar S, Chatterjee M, Ghosh S, Roy K. Role of vitamin D3 on the activity patterns of hepatic drug metabolizing enzymes in transplantable murine lymphoma. Cancer Invest 1996; 14:328-34. [PMID: 8689427 DOI: 10.3109/07357909609012159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Vitamin D3 (D3) has been found to exert varied pharmacological actions including restriction of cell growth of a number of malignant cell lines in vitro and inhibition of the promotion of chemical carcinogenesis in mouse skin. In an attempt to confirm the efficacy of D3 as an antineoplastic agent, the present investigation aims at characterizing the importance of D3 in modulating hepatic drug metabolizing enzymes, namely, cytosolic glutathione S-transferase (GSHT), microsomal UDP glucuronyl transferase (UDPGT), and cytochrome P-450, which have been reported by us in recent literature as significant neoplastic markers in mice bearing Dalton's lymphoma (DL). Results show that D3 causes a 150% elevation of GSHT activity and the maintenance of normal, near-control UDPGT activity and cytochrome P-450 content, up to almost 30 days following tumor transplantation, along with bringing about a twofold increase in survival of the host mice. In conclusion, we confirm the definite and significant antitumorigenic role of D3 and its involvement with the discussed hepatic tumor markers in monitoring the processes that lead to cell survival.
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Affiliation(s)
- S Sardar
- Division of Biochemistry, Department of Pharmaceutical Technology, Jadavpur University, Calcutta, India
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Ghosh B, Sardar S, Roy K, Chatterjee M. Role of beta-carotene on the changes in activity patterns and levels of biotransforming enzymes in transplantable murine lymphoma. Cancer Lett 1995; 90:191-7. [PMID: 7736455 DOI: 10.1016/0304-3835(95)03711-5] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The differential levels of induction of hepatic microsomal cytochrome P-450 (cyt. P-450), UDP-glucuronyl transferase (UDPGT) and cytosolic glutathione-S-transferase (GST) activities were evaluated over various periods of time, following tumor transplantation in male Swiss albino mice in the presence and absence of beta-carotene supplementation in their basal diet (100 mg/kg). An increase in the total hepatic microsomal cytochrome P-450 and UDP-glucuronyl transferase and cytosolic GSH-transferase activities (1.5 to 2 fold) occurred during the later stage of tumor progression (22 +/- 2 days onwards). However, beta-carotene supplementation throughout the study increased or decreased the random activity trends of the above markers significantly (P < 0.05- < 0.01). Finally, beta-carotene supplementation could enhance the survival of the host bearing lymphoma by almost 2-fold (50-60 days) over and above the lymphoma controls (30-35 days).
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Affiliation(s)
- B Ghosh
- Department of Pharmaceutical Technology, Jadavpur University, Calcutta, India
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Powers SR, Burdge R, Leather R, Monaco V, Newell J, Sardar S, Smith EJ. Studies of pulmonary insufficiency in non-thoracic trauma. J Trauma 1972; 12:1-14. [PMID: 4550453 DOI: 10.1097/00005373-197201000-00001] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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