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Borges ME, Navarro S, de Paz Carmona H, Esparza P. Natural Volcanic Material as a Sustainable Photocatalytic Material for Pollutant Degradation under Solar Irradiation. Materials 2022; 15:ma15113996. [PMID: 35683289 PMCID: PMC9182453 DOI: 10.3390/ma15113996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/27/2022] [Accepted: 06/01/2022] [Indexed: 11/16/2022]
Abstract
Recently, photocatalysis has been demonstrated as a solid approach for efficient wastewater cleaning. Using natural materials as photocatalysts means a promising solution to develop green catalysts for environmental purposes. This work aimed to study the suitability of a natural volcanic material (La Gomera, Canary Islands, Spain) as a photocatalytic material for the degradation of pollutants in wastewater with solar energy. After analysing the properties of the natural material (BET surface 0.188 m2/g and band-gap of 3 eV), the photocatalytic activity was evaluated at laboratory and pilot plant scale for the degradation of methylene blue (MB) in water (50 mg L−1), at 20 °C, during a period of 4 h, under UV/Vis light and solar irradiation. Photolytic and adsorption studies were developed to distinguish the photocatalytic contribution to the wastewater decontamination process by photocatalysis. Our results enable us to determine the viability of black sand as a photocatalytic material activated by solar irradiation (photodegradation of MB up to 100% by using solar energy), developing a natural and green photocatalytic system with significantly high potential for application in a sustainable wastewater cleaning process.
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Affiliation(s)
- María Emma Borges
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, 38200 La Laguna, Tenerife, Spain; (S.N.); (H.d.P.C.)
- Correspondence:
| | - Silvia Navarro
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, 38200 La Laguna, Tenerife, Spain; (S.N.); (H.d.P.C.)
| | - Héctor de Paz Carmona
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, 38200 La Laguna, Tenerife, Spain; (S.N.); (H.d.P.C.)
| | - Pedro Esparza
- Chemistry Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, 38200 La Laguna, Tenerife, Spain;
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Sierra M, Borges E, Esparza P, Méndez-Ramos J, Martín-Gil J, Martín-Ramos P. Photocatalytic activities of coke carbon/g-C 3N 4 and Bi metal/Bi mixed oxides/g-C 3N 4 nanohybrids for the degradation of pollutants in wastewater. Sci Technol Adv Mater 2016; 17:659-668. [PMID: 27877912 PMCID: PMC5102004 DOI: 10.1080/14686996.2016.1235962] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 09/07/2016] [Accepted: 09/09/2016] [Indexed: 05/24/2023]
Abstract
Different g-C3N4 composite systems (coke carbon/g-C3N4, Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4) have been assessed as photocatalysts for wastewater pollutants removal. The coke carbon/g-C3N4 hybrid, produced by thermal treatment at 550 °C of a composite made from melamine cyanurate and coke, only showed activity under UV-light irradiation. On the other hand, inorganic Bi spheres/Bi mixed oxides/g-C3N4 nanohybrids (Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4 composites), produced by thermal reduction of Bi2WO6 or Bi2MoO6 by g-C3N4, exhibited a remarkable red-shift, up to 620 nm, and allowed the visible-light driven degradation of the contaminant, albeit in combination with some adsorption.
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Affiliation(s)
- Marta Sierra
- Chemical Engineering Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Emma Borges
- Chemical Engineering Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Pedro Esparza
- Chemical Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Jorge Méndez-Ramos
- Physics Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Jesús Martín-Gil
- Advanced Materials Laboratory, ETSIIAA, University of Valladolid, Palencia, Spain
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Esparza P, Hernández T, Borges M, Álvarez-Galván M, Ruiz-Morales J, Fierro J. TiO2 modifications by hydrothermal treatment and doping to improve its photocatalytic behaviour under visible light. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.12.011] [Citation(s) in RCA: 24] [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: 10/27/2022]
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Méndez-Ramos J, Acosta-Mora P, Ruiz-Morales JC, Hernández T, Borges ME, Esparza P. Turning into the blue: materials for enhancing TiO2 photocatalysis by up-conversion photonics. RSC Adv 2013. [DOI: 10.1039/c3ra44342f] [Citation(s) in RCA: 24] [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: 11/21/2022] Open
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Martín E, Guenther E, del Burgo C, Zapatero Osorio M, Deshpande R, Rodler F, Béjar V, Esparza P, Valdivielso L, Moitinho A, Amorim A, Lima J, Fiorenzano A, Magazzu A, Tata R. High precision radial velocities in the near-infrared domain: Status and prospects. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20111602001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Valdivielso L, Esparza P, Martín E, Peale R, Maukonen D. Development of gas absorption cells for infrared echelle spectrographs. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20111602008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Esparza P, Borges ME, Díaz L, Alvarez-Galván MC, Fierro JLG. Equilibrium and kinetics of adsorption of methylene blue on Ti-modified volcanic ashes. AIChE J 2010. [DOI: 10.1002/aic.12285] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sokolov M, Esparza P, Hernandez-Molina R, Platas JG, Mederos A, Gavin JA, Llusar R, Vicent C. Preparation and Properties of the Full Series of Cuboidal Clusters [MoxW4-xSe4(H2O)12]n+ (n = 4−6) and Their Derivatives. Inorg Chem 2005; 44:1132-41. [PMID: 15859295 DOI: 10.1021/ic049298a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrothermal reactions between incomplete cuboidal cluster aqua complexes [M3Q4(H2O)9]4+ and M(CO)6 (M = Mo, W; Q = S, Se) offer easy access to the corresponding cuboidal clusters M4Q4. The complete series of homometal and mixed Mo/W clusters [Mo(x)W4-xQ4(H2O)12]n+ (x = 0-4, n = 4-6) has been prepared. Upon oxidation of the mixed-metal clusters, it is the W atom which is lost, allowing selective preparation of new trinuclear clusters [Mo2WSe4(H2O)9]4+ and [MoW2Se4(H2O)9]4+. The aqua complexes were converted by ligand exchange reactions into dithiophosphato and thiocyanato complexes, and crystal structures of [W4S4((EtO)2PS2)6], [MoW3S4((EtO)2PS2)6], [Mo4Se4((EtO)2PS2)6], [W4Se4((i-PrO)2PS2)6], and (NH4)6[W4Se4(NCS)12]-4H20 were determined. Cyclic voltammetry was performed on [Mo(x)W4-xCO4(H2O)12]n+, showing reversible redox waves 6+/5+ and 5+/4+. The lower oxidation states are more difficult to access as the number of W atoms increases. The [Mo2WSe4(H2O)9]4+ and [MoW2Se4(H2O)9]4+ species were derivatized into [Mo2WSe4(acac)3(py)3]+ and [MoW2Se4(acac)3(py)3]+, which were also studied by CV. When appropriate, the products were also characterized by FAB-MS and NMR (31P, 1H) data.
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Affiliation(s)
- M Sokolov
- A V Nikolayev Institute of Inorganic Chemistry, Novosibirsk 630090, Russia.
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Hernandez-Molina R, Sokolov M, Esparza P, Vicent C, Llusar R. Aqueous solution chemistry of [Mo3CuSe4]n+ (n = 4, 5) and [W3CuQ4]5+ (Q = S, Se) clusters. Dalton Trans 2004:847-51. [PMID: 15252468 DOI: 10.1039/b401386g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The triangular cluster [Mo3Se4(H2O)9]4+ reacts with Cu turnings to give a new heterometallic cuboidal cluster [Mo3CuSe4(H2O)10]4+(purple; UV/Vis lambda(epsilon): 352(3907), 509(2613)). The reaction of [Mo3Se4(H2O)9]4+ with CuCl afforded the 5+ cube [Mo3CuSe4(H2O)10]5+(red; UV/Vis lambda(epsilon): 356(5406), 500(3477)). In contrast, [W3Se4(H2O)9]4+ both with Cu and CuCl gives the 5+ cube, [W3CuSe4(H2O)10]5+(yellow-green; UV/Vis lambda(epsilon): 312(5327), 419(3256) and 628(680)). Cyclic voltammetry of [M3CuQ4(H2O)10]5+ in 2 M HCl (M = Mo, W; Q = S, Se) shows a reversible one-electron reduction wave for the Mo clusters, but no reduction occurs for the W clusters prior to H+ reduction. In HCl solutions, Cl is coordinated to the Cu site of the clusters, alongside some less extensive coordination to Mo and W, and for [W3(CuCl)S4(H2O)6Cl3]+, isolated as the supramolecular adduct with cucurbit[6]uril, [W3(CuCl)S4(H2O)6Cl3]2Cl2 x C36H36N24O12 x 12H2O, the crystal structure was determined (Cu-W 2.856(4) angstroms, W-W 2.7432(15) angstroms, Cu-Cl 2.167(13) angstroms).
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Gómez Cabanillas P, Esparza P, Urreta Barallobre I, García Pardos C. [Episode of hypotonia and weakness of the lower extremities in two siblings]. An Pediatr (Barc) 2003; 58:203-4. [PMID: 12628161 DOI: 10.1016/s1695-4033(03)78035-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- P Gómez Cabanillas
- Unidad de Urgencias. Servicio de Pediatría. Hospital Donostia. San Sebastián. España
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Sanchiz J, Esparza P, Villagra D, Domínguez S, Mederos A, Brito F, Araujo L, Sánchez A, Arrieta JM. Holo- and hemidirected lead(II) in the polymeric [Pb(4)(mu-3,4-TDTA)2(H2O)2]*4H2O complex. N,N,N',N'-tetraacetate ligands derived from o-phenylenediamines as sequestering agents for lead(II). Inorg Chem 2002; 41:6048-55. [PMID: 12425632 DOI: 10.1021/ic0201304] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The coordinating ability of the ligands 3,4-toluenediamine-N,N,N',N'-tetraacetate (3,4-TDTA), o-phenylenediamine-N,N,N',N'-tetraacetate (o-PhDTA), and 4-chloro-1,2-phenylenediamine-N,N,N',N'-tetraacetate (4-Cl-o-PhDTA) (H4L acids) toward lead(II) is studied by potentiometry (25 degrees C, I = 0.5 mol x dm(-3) in NaClO4), UV-vis spectrophotometry, and 207Pb NMR spectrometry. The stability constants of the complex species formed were determined. X-ray diffraction structural analysis of the complex [Pb4(mu-3,4-TDTA)4(H2O)2]*4H2O (1) revealed that 1 has a 2-D structure. The layers are built up by the polymerization of centrosymmetric [Pb4L2(H2O)2] tetranuclear units. The neutral layers have the aromatic rings of the ligands pointing to the periphery, whereas the metallic ions are located in the central part of the layers. In compound 1, two types of six-coordinate lead(II) environments are produced. The Pb(1) is coordinated to two nitrogen atoms and four carboxylate oxygens from the ligand, whereas Pb(2) has an O6 trigonally distorted octahedral surrounding. The lead(II) ion is surrounded by five carboxylate oxygens and a water molecule. The carboxylate oxygens belong to four different ligands that are also joined to four other Pb(1) ions. The selective uptake of lead(II) was analyzed by means of chemical speciation diagrams as well as the so-called conditional or effective formation constants K(Pb)eff. The results indicate that, in competition with other ligands that are strong complexing agents for lead(II), our ligands are better sequestering agents in acidic media.
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Affiliation(s)
- Joaquín Sanchiz
- Department of Inorganic Chemistry, University of La Laguna, E-38204 La Laguna, Tenerife, Canary Islands, Spain
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Sokolov MN, Dybtsev DN, Virovets AV, Fedin VP, Esparza P, Hernandez-Molina R, Fenske D, Sykes AG. Preparation and properties of the aqua ions [W(4)S(4)(H(2)O)(12)](n+) (n = 5, 6) and crystal structure of (Me(2)NH(2))(6)[W(4)S(4)(NCS)(12)].0.5H(2)O. Inorg Chem 2002; 41:1136-9. [PMID: 11874348 DOI: 10.1021/ic010830t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The [3 + 1] reaction of [W(3)S(4)(H(2)O)(9)](4+) with [W(CO)(6)] in 2 M HCl under hydrothermal conditions (130 degrees C) gives the [W(4)S(4)(H(2)O)(12)](6+) cuboidal cluster, reduction potential 35 mV vs NHE (6+/5+ couple). The reduced form is obtained by controlled potential electrolysis. X-ray crystal structure was determined for (Me(2)NH(2))(6)[W(4)S(4)(NCS)(12)].0.5H(2)O. The W-W and W-S bond lengths are 2.840 and 2.379 A, respectively.
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Affiliation(s)
- Maxim N Sokolov
- Institute of Inorganic Chemistry, Russian Academy of Sciences, pr. Lavrentjeva 3, Novosibirsk 630090, Russia
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Hernández-Molina R, Sokolov M, Clegg W, Esparza P, Mederos A. Preparation and characterization of triangular clusters [M3Q4(acac)3(py)3]+ (M=Mo, W; Q=S, Se). Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(01)00746-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sanchiz J, Esparza P, Domínguez S, Mederos A, Saysell D, Sánchez A, Ruano R, Arrieta JM. Crystal structure of the 3-D complex [(H2O)Cd(μ-3,4-TDTA)Cd(H2O)]. Potentiometric and 113Cd NMR studies in aqueous solution (3,4-TDTA = 3,4-toluenediamine-N,N,N ′,N ′-tetraacetate). ACTA ACUST UNITED AC 2001. [DOI: 10.1039/b100152n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Martín H, Carro P, Hernández Creus A, Morales J, Fernández G, Esparza P, González S, Salvarezza RC, Arvia AJ. Interplay of Surface Diffusion and Surface Tension in the Evolution of Solid/Liquid Interfaces. Dealloying of β-Brass in Aqueous Sodium Chloride. J Phys Chem B 2000. [DOI: 10.1021/jp001077c] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [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)
- H. Martín
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - P. Carro
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - A. Hernández Creus
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - J. Morales
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - G. Fernández
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - P. Esparza
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - S. González
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - R. C. Salvarezza
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
| | - A. J. Arvia
- Departamento de Química Fisica, Facultad de Química, and Departamento de Química Inorgánica, Facultad de Química, Universidad de La Laguna, Spain, and Instituto de Investigaciones Fisicoquimicas Teóricas y Aplicadas (INIFTA) (UNLP-CONICET-CIC Bs.As.), Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
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Sanchiz J, Esparza P, Domı́nguez S, Brito F, Mederos A. Solution studies of complexes of iron(III) with iminodiacetic, alkyl-substituted iminodiacetic and nitrilotriacetic acids by potentiometry and cyclic voltammetry. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(99)00125-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pulido N, Montesinos A, Arriaza M, Esparza P. [Prophylactic use of antibiotics in umbilical catheterization in newborn infants]. Rev Chil Pediatr 1985; 56:247-9. [PMID: 3832185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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