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Teselkin YO, Babenkova IV, Osipov AN. A Modified Chemiluminescent Method for Determination of the Antioxidant Capacity of Biological Fluids and Tissues. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s0006350919050233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Bailey DM, Lundby C, Berg RMG, Taudorf S, Rahmouni H, Gutowski M, Mulholland CW, Sullivan JL, Swenson ER, McEneny J, Young IS, Pedersen BK, Møller K, Pietri S, Culcasi M. On the antioxidant properties of erythropoietin and its association with the oxidative-nitrosative stress response to hypoxia in humans. Acta Physiol (Oxf) 2014; 212:175-87. [PMID: 24811856 DOI: 10.1111/apha.12313] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/14/2014] [Accepted: 05/05/2014] [Indexed: 12/21/2022]
Abstract
AIM The aim of this study was to examine if erythropoietin (EPO) has the potential to act as a biological antioxidant and determine the underlying mechanisms. METHODS The rate at which its recombinant form (rHuEPO) reacts with hydroxyl (HO˙), 2,2-diphenyl-1-picrylhydrazyl (DPPH˙) and peroxyl (ROO˙) radicals was evaluated in-vitro. The relationship between the erythopoietic and oxidative-nitrosative stress response to poikilocapneic hypoxia was determined separately in-vivo by sampling arterial blood from eleven males in normoxia and following 12 h exposure to 13% oxygen. Electron paramagnetic resonance spectroscopy, ELISA and ozone-based chemiluminescence were employed for direct detection of ascorbate (A(˙-) ) and N-tert-butyl-α-phenylnitrone spin-trapped alkoxyl (PBN-OR) radicals, 3-nitrotyrosine (3-NT) and nitrite (NO2-). RESULTS We found rHuEPO to be a potent scavenger of HO˙ (kr = 1.03-1.66 × 10(11) m(-1) s(-1) ) with the capacity to inhibit Fenton chemistry through catalytic iron chelation. Its ability to scavenge DPPH˙ and ROO˙ was also superior compared to other more conventional antioxidants. Hypoxia was associated with a rise in arterial EPO and free radical-mediated reduction in nitric oxide, indicative of oxidative-nitrosative stress. The latter was confirmed by an increased systemic formation of A˙(-) , PBN-OR, 3-NT and corresponding loss of NO2- (P < 0.05 vs. normoxia). The erythropoietic and oxidative-nitrosative stress responses were consistently related (r = -0.52 to 0.68, P < 0.05). CONCLUSION These findings demonstrate that EPO has the capacity to act as a biological antioxidant and provide a mechanistic basis for its reported cytoprotective benefits within the clinical setting.
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Affiliation(s)
- D. M. Bailey
- Neurovascular Research Laboratory; Faculty of Life Sciences and Education; University of South Wales; Treforest UK
- Aix-Marseille Université; CNRS; Institut de Chimie Radicalaire UMR 7273; Équipe Sondes Moleculaires en Biologie et Stress Oxydant; Marseille France
| | - C. Lundby
- Center for Integrative Human Physiology; Institute of Physiology; University of Zurich; Zurich Switzerland
| | - R. M. G. Berg
- Department of Infectious Diseases; Centre of Inflammation and Metabolism; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
| | - S. Taudorf
- Department of Infectious Diseases; Centre of Inflammation and Metabolism; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
| | - H. Rahmouni
- Aix-Marseille Université; CNRS; Institut de Chimie Radicalaire UMR 7273; Équipe Sondes Moleculaires en Biologie et Stress Oxydant; Marseille France
| | - M. Gutowski
- Institute of Biochemistry and Cell Biology; Shanghai Institute for Biological Sciences; Chinese Academy of Sciences; Shanghai China
| | - C. W. Mulholland
- Neurovascular Research Laboratory; Faculty of Life Sciences and Education; University of South Wales; Treforest UK
| | - J. L. Sullivan
- Burnett College of Biomedical Sciences; University of Central Florida; Orlando FL USA
| | - E. R. Swenson
- Division of Pulmonary and Critical Care Medicine; Department of Medicine; University of Washington; Seattle WA USA
| | - J. McEneny
- Centre for Clinical and Population Sciences; Queen's University Belfast; Belfast UK
| | - I. S. Young
- Centre for Clinical and Population Sciences; Queen's University Belfast; Belfast UK
| | - B. K. Pedersen
- Department of Infectious Diseases; Centre of Inflammation and Metabolism; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
| | - K. Møller
- Department of Infectious Diseases; Centre of Inflammation and Metabolism; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
- Department of Neuroanaesthesiology; University Hospital Rigshospitalet; Copenhagen Denmark
| | - S. Pietri
- Aix-Marseille Université; CNRS; Institut de Chimie Radicalaire UMR 7273; Équipe Sondes Moleculaires en Biologie et Stress Oxydant; Marseille France
| | - M. Culcasi
- Aix-Marseille Université; CNRS; Institut de Chimie Radicalaire UMR 7273; Équipe Sondes Moleculaires en Biologie et Stress Oxydant; Marseille France
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Protection against peroxynitrite-induced DNA damage by mesalamine: implications for anti-inflammation and anti-cancer activity. Mol Cell Biochem 2013; 378:291-8. [PMID: 23529546 DOI: 10.1007/s11010-013-1620-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 03/02/2013] [Indexed: 12/21/2022]
Abstract
Mesalamine (5-aminosalicylic acid, 5-ASA) is known to be the first-line medication for treatment of patients with ulcerative colitis. Studies have demonstrated that ulcerative colitis patients treated with 5-ASA have an overall decrease in the risk of developing colorectal carcinoma. However, the mechanisms underlying 5-ASA-mediated anti-inflammatory and anti-cancer effects are yet to be elucidated. Because peroxynitrite has been critically involved in inflammatory stress and carcinogenesis, this study was undertaken to investigate the effects of 5-ASA in peroxynitrite-induced DNA strand breaks, an important event leading to peroxynitrite-elicited cytotoxicity. Incubation of φX-174 plasmid DNA with the peroxynitrite generator 3-morpholinosydnonimine (SIN-1) led to the formation of both single- and double-stranded DNA breaks in a concentration-dependent manner. The presence of 5-ASA at 0.1 and 1.0 mM was found to significantly inhibit SIN-1-induced DNA strand breaks in a concentration-dependent manner. The consumption of oxygen induced by SIN-1 was found to not be affected by 5-ASA at 0.1-50 mM, indicating that 5-ASA at these concentrations is not involved in the auto-oxidation of SIN-1 to form peroxynitrite. It is observed that 5-ASA at 0.1-1 mM showed considerable inhibition of peroxynitrite-mediated luminol chemiluminescence in a dose-dependent fashion, suggesting that 5-ASA is able to directly scavenge the peroxynitrite. Electron paramagnetic resonance (EPR) spectroscopy in combination with spin-trapping experiments, using 5,5-dimethylpyrroline-N-oxide (DMPO) as spin trap resulting in the formation of DMPO-hydroxyl radical adduct from peroxynitrite, and 5-ASA only at higher concentration (1 mM) inhibited the hydroxyl radical adduct while shifting EPR spectra, indicating that 5-ASA at higher concentrations may generate a more stable free radical species rather than acting purely as a hydroxyl radical scavenger. Taken together, these studies demonstrate for the first time that 5-ASA can potently inhibit peroxynitrite-mediated DNA strand breakage, scavenge peroxynitrite, and affect peroxynitrite-mediated radical formation, which may be responsible, at least partially, for its anti-inflammatory and anti-cancer effects.
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Cleveland BM, Leonard SS, Klandorf H, Blemings KP. Urate oxidase knockdown decreases oxidative stress in a murine hepatic cell line. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2011; 2:93-8. [PMID: 20357931 PMCID: PMC2763251 DOI: 10.4161/oxim.2.2.8372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Revised: 03/10/2009] [Accepted: 03/10/2009] [Indexed: 02/04/2023]
Abstract
Humans, birds, and some primates do not express the uric acid degrading enzyme urate oxidase (UOX) and, as a result, have plasma uric acid concentrations higher than UOX expressing animals. Although high uric acid concentrations are suggested to increase the antioxidant defense system and provide a health advantage to animals without UOX, knockout mice lacking UOX develop pathological complications including gout and kidney failure. As an alternative to the knockout model, RNA interference was used to decrease UOX expression using stable transfection in a mouse hepatic cell line (ATCC, FL83B). Urate oxidase mRNA was reduced 66% (p < 0.05) compared to wild type, as measured by real time RT-PCR. To determine if UOX knockdown resulted in enhanced protection against oxidative stress, cells were challenged with hexavalent chromium (Cr(VI)) or 3-morpholinosydnonimine hydrochloride (SIN-1). Compared to wild type, cells with UOX knockdown exhibited a 37.2 ± 3.5% reduction (p < 0.05) in the electron spin resonance (ESR) signal after being exposed to Cr(VI) and displayed less DNA fragmentation (p < 0.05) following SIN-1 treatment. Cell viability decreased in wild type cells (p < 0.05), but not cells with UOX knockdown, after treatment with SIN-1. These results are consistent with an increased intracellular uric acid concentration and an increased defense against oxidative stress.
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Affiliation(s)
- Beth M Cleveland
- Division of Animal and Nutritional Sciences, West Virginia University, Morgantown, WV 26506, USA
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Fedorova GF, Menshov VA, Trofimov AV, Vasil'ev RF. Facile chemiluminescence assay for antioxidative properties of vegetable lipids: fundamentals and illustrative examples. Analyst 2009; 134:2128-34. [PMID: 19768225 DOI: 10.1039/b905059k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The general approach disclosed herein opens the new possibilities of exploiting the oxidation processes followed by chemiluminescence (CL) emission for the assessment of an antioxidant potential of natural lipid materials and enables determination of the amount and strength of lipid-borne antioxidants in one experiment. The reliability of the analytical procedure is completely unaffected by an inevitable entering of oxidizable lipid portions into the probe chemiluminescent mixture, which is exemplarily illustrated for the case of vegetable oils which served as sources of antioxidant-containing lipids. As a matter of fact, the difference in the effective radical-scavenging rate constants, determined for the antioxidative constituents of the sunflower and corn oils, perfectly matches the distinction of their qualitative tocopherol contents. In addition to the antiradical activity of lipid samples, the antioxidant potential of the latter may be modified by their influence on hydroperoxide stability, as it has been also demonstrated in the present work.
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Affiliation(s)
- Galina F Fedorova
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, ul. Kosygina 4, 119334 Moscow, Russian Federation
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Pellegrino D, Shiva S, Angelone T, Gladwin MT, Tota B. Nitrite exerts potent negative inotropy in the isolated heart via eNOS-independent nitric oxide generation and cGMP-PKG pathway activation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1787:818-27. [PMID: 19248761 DOI: 10.1016/j.bbabio.2009.02.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Revised: 02/16/2009] [Accepted: 02/17/2009] [Indexed: 12/13/2022]
Abstract
The ubiquitous anion nitrite (NO(2)(-)) has recently emerged as an endocrine storage form of nitric oxide (NO) and a signalling molecule that mediates a number of biological responses. Although the role of NO in regulating cardiac function has been investigated in depth, the physiological signalling effects of nitrite on cardiac function have only recently been explored. We now show that remarkably low concentrations of nitrite (1 nM) significantly modulate cardiac contractility in isolated and perfused Langendorff rat heart. In particular, nitrite exhibits potent negative inotropic and lusitropic activities as evidenced by a decrease in left ventricular pressure and relaxation, respectively. Furthermore, we demonstrate that the nitrite-dependent effects are mediated by NO formation but independent of NO synthase (NOS) activity. Specifically, nitrite infusion in the Langendorff system produces NO and cGMP/PKG-dependent negative inotropism, as evidenced by the formation of cellular iron-nitrosyl complexes and inhibition of biological effect by NO scavengers and by PKG inhibitors. These data are consistent with the hypothesis that nitrite represents an eNOS-independent source of NO in the heart which modulates cardiac contractility through the NO-cGMP/PKG pathway. The observed high potency of nitrite supports a physiological function of nitrite as a source of cardiomyocyte NO and a fundamental signalling molecule in the heart.
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Affiliation(s)
- Daniela Pellegrino
- Department of Pharmaco-Biology, University of Calabria, 87030 Rende, Italy
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SIN-1 cytotoxicity to PC12 cells is mediated by thiol-sensitive short-lived substances generated through SIN-1 decomposition in culture medium. Nitric Oxide 2009; 20:270-8. [PMID: 19232545 DOI: 10.1016/j.niox.2009.02.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Revised: 01/08/2009] [Accepted: 02/08/2009] [Indexed: 12/30/2022]
Abstract
As a generator of peroxynitrite (ONOO(-)), 3-morpholinosydnonimine (SIN-1) is widely used in the study of oxidative/nitrosative stress in cultured cells, although controversy exists regarding active species responsible for cytotoxicity. In this study, we report that unstable thiol-sensitive substances, generated from the reaction of SIN-1 with components in culture medium, play a crucial role in SIN-1 cytotoxicity in PC12 cells. Exposure of cells to culture medium obtained after almost complete SIN-1 decomposition at 37 degrees C for 2h demonstrated almost the same degree of cytotoxicity as did fresh SIN-1. The cytotoxicity of SIN-1-decomposed medium largely depended on serum, decayed with time, and could be completely abolished by the addition of thiols. Degradation of synthetic ONOO(-) in the culture medium did not reproduce the unstable cytotoxicity. The presence of superoxide dismutase (SOD) during SIN-1 decomposition prevented the formation of the cytotoxic substances, whereas SOD had no protection against the cytotoxicity itself, suggesting a crucial role of simultaneously generated superoxide and nitric oxide in the formation of the toxicants, but not in their cytotoxic action. The cytotoxicity of fresh SIN-1 is dramatically suppressed in a basal medium (Hanks balanced salt), suggesting that the cytotoxicity of fresh SIN-1 also requires components of culture medium. These results suggest that SIN-1 cytotoxicity in PC12 cells is mediated via the generation of cytotoxic substances in the medium during its decomposition.
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Optimization and validation of an alternative method to evaluate total reactive antioxidant potential. Anal Biochem 2009; 385:107-14. [DOI: 10.1016/j.ab.2008.10.036] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 10/08/2008] [Accepted: 10/29/2008] [Indexed: 11/17/2022]
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Contreras R, Sahlin H, Frangos JA. Titanate biomaterials with enhanced antiinflammatory properties. J Biomed Mater Res A 2007; 80:480-5. [PMID: 17013866 DOI: 10.1002/jbm.a.30961] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
While titanium implants are generally recognized as having excellent biocompatibility, the mechanistic basis for this has yet to be established. We previously demonstrated that TiO2, found on surfaces of titanium, has antioxidant properties that degrade the reactive oxygen species (ROS) which mediate the inflammatory response. We hypothesized that the antioxidant mechanism was similar to that known to mediate photocatalysis by titanium oxides. Specifically, we investigated whether the electronic or valence state of the surface titanium atoms mediates the catalytic degradation of ROS. Surface Ti(IV) atoms in TiO2 and SrTiO3 single crystal substrates were converted into Ti(III) while maintaining the bulk crystalline structure by vacuum annealing or Niobium doping. The degradation of both chemically-induced and neutrophil-derived ROS were significantly increased by changing the valence state of surface titanium. These results suggest that titanium-mediated degradation of ROS is through a catalytic mechanism. Furthermore, we describe a series of novel biomaterials that have antioxidant properties superior to those of titanium.
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Affiliation(s)
- Ramiro Contreras
- La Jolla Bioengineering Institute, 505 Coast Boulevard South, La Jolla, California 92037, USA
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Yin J, Liu YH, Xu YF, Zhang YJ, Chen JG, Shu BH, Wang JZ. Melatonin arrests peroxynitrite-induced tau hyperphosphorylation and the overactivation of protein kinases in rat brain. J Pineal Res 2006; 41:124-9. [PMID: 16879317 DOI: 10.1111/j.1600-079x.2006.00343.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The purpose of this study was to examine the in vivo effect of melatonin (MEL) on peroxynitrite-induced tau hyperphosphorylation and the involvement of glycogen synthase kinase-3beta (GSK-3beta) and mitogen-activated protein kinase (MAPK) families. Melatonin was injected into the right cerebroventricle of the rats 1 hr before the bilateral hippocampal injection of 3-morpholino-sydnonimine chloride (SIN-1), the recognized donor of peroxynitrite. Thereafter, the phosphorylation level of tau and the activity of the kinases were analyzed. The injection of SIN-1 induced hyperphosphorylation of tau at pS396 epitope with a concomitant activation of GSK-3beta and selective MAPK isoforms including p38alpha, p38beta, and p38delta but not p38gamma. The effect of peroxynitrite was confirmed using uric acid, a recognized scavenger of peroxynitrite. Preinjection of MEL significantly arrested the peroxynitrite-induced hyperphosphorylation of tau and the activation of GSK-3beta and MAPKs. Melatonin also ameliorated peroxynitrite-induced oxidative stress. We conclude that MEL can efficiently arrest peroxynitrite-induced tau hyperphosphorylation, and the underlying mechanism may involve scavenging the reactive species and suppressing the activated GSK-3beta and p38 MAPK family.
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Affiliation(s)
- Jun Yin
- Department of Pathophysiology, Hua-Zhong University of Science and Technology, Wuhan, China
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Sahlin H, Contreras R, Gaskill DF, Bjursten LM, Frangos JA. Anti-inflammatory properties of micropatterned titanium coatings. J Biomed Mater Res A 2006; 77:43-9. [PMID: 16345099 DOI: 10.1002/jbm.a.30642] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Prolonged inflammation and reactive oxygen species (ROS) generated around an implanted biosensor are the primary causes of the foreign body response, including encapsulation of biosensor membranes. We have previously demonstrated that TiO2 surfaces reduce ROS. Here we investigated the potential of using the anti-inflammatory properties of TiO2 in the design of biosensor membranes with improved long-term in vivo transport properties. Micropatterned Ti films were sputtered onto quartz surfaces in a series of hexagonally distributed dots with identical coverage area of 23% and dot size ranging from 5 to 100 microm. The antioxidant effect of the surfaces was investigated using a cell-free peroxynitrite donor assay and assays of superoxide released from stimulated surface-adhering neutrophils and macrophages. In all three assays, the amount of ROS was monitored using luminol-amplified chemiluminescence. Patterned surfaces in all experimental models significantly decreased ROS compared to the etched surfaces. In the cell-free experiment, the ROS reduction was only dependent on fractional surface coverage. In the cell experiments, however, a dot-size-dependent ROS reduction was seen, with the largest reduction at the smallest dot-size surfaces. These results indicate that micropatterned surfaces with small dots covering only 23% of the surface area exhibit similar antioxidative effect as fully covered surfaces.
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Affiliation(s)
- Herman Sahlin
- La Jolla Bioengineering Institute, 505 Coast Boulevard South, La Jolla, California 92037, USA
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Bastos EL, Romoff P, Eckert CR, Baader WJ. Evaluation of antiradical capacity by H2O2-hemin-induced luminol chemiluminescence. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2003; 51:7481-7488. [PMID: 14640603 DOI: 10.1021/jf0345189] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This paper describes a screening method for antioxidant potential determination based on luminol/hemin/hydrogen peroxide chemiluminescence. The emission depletion, caused by an antiradical compound added during the chemiluminescence decay, is proportional to the number of reactive species trapped. Therefore, the difference between the areas of the emission decay curves, obtained in the absence and in the presence of the potential antioxidant, is a measure for the antiradical capacity of the sample. The technique has been applied to measure the antiradical capacity of pure compounds and complex mixtures from natural origin, providing reliable results that indicate the method's feasibility.
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Affiliation(s)
- Erick L Bastos
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, Bloco 12 S, São Paulo, SP, 05508-900, Brazil
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