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Oyewusi HA, Huyop F, Wahab RA, Hamid AAA. In silico assessment of dehalogenase from Bacillus thuringiensis H2 in relation to its salinity-stability and pollutants degradation. J Biomol Struct Dyn 2021; 40:9332-9346. [PMID: 34014147 DOI: 10.1080/07391102.2021.1927846] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Increased scientific interest has led to the rise in biotechnological uses of halophilic and halotolerant microbes for hypersaline wastewater bioremediation. Hence, this study performed molecular docking, molecular dynamic (MD) simulations, and validation by Molecular Mechanic Poisson-Boltzmann Surface Area (MM-PBSA) calculations on the DehH2 from Bacillus thuringiensis H2. We aimed to identify the interactions of DehH2 with substrates haloacids, haloacetates, and chlorpyrifos under extreme salinity (35% NaCl). MD simulations revealed that DehH2 preferentially degraded haloacids and haloacetates (-6.3 to -4.7 kcal/mol) by forming three or four hydrogen bonds to the catalytic triad, Asp125, Arg201, and Lys202. Conversely, chlorpyrifos was the least preferred substrate in both MD simulations and MM-PBSA calculations. MD simulation results ranked the DehH2-L-2CP complex (RMSD □0.125-0.23 nm) as the most stable while the least was the DehH2-chlorpyrifos complex (RMSD 0.32 nm; RMSF 0.0 - 0.29). The order of stability was as follows: DehH2-L-2CP > DehH2-MCA > DehH2-D-2CP > DehH2-3CP > DehH2-2,2-DCP > DehH2-2,3-DCP > DehH2-TCA > DehH2-chlorpyrifos. The MM-PBSA calculations further affirmed the DehH2-L-2CP complex's highest stability with the lowest binding energy of -45.14 kcal/mol, followed closely by DehH2-MCA (-41.21 kcal/mol), DehH2-D-2CP (-31.59 kcal/mol), DehH2-3CP (-30.75 kcal/mol), DehH2-2,2- DCP (-29.72 kcal/mol), DehH2-2,3-DCP (-22.20 kcal/mol) and DehH2-TCA (-18.46 kcal/mol). The positive binding energy of the DehH2-chlorpyrifos complex (+180.57 kcal/mol) proved the enzyme's non-preference for the substrate. The results ultimately illustrated the unique specificity of the DehH2 to degrade the above-said pollutants under a hypersaline condition.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Habeebat Adekilekun Oyewusi
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Malaysia.,Enzyme Technology and Green Synthesis Research Group, Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Malaysia.,Department of Biochemistry, School of Science and Computer Studies, Federal Polytechnic Ado Ekiti, Ado Ekiti, Ekiti State, Nigeria
| | - Fahrul Huyop
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Malaysia.,Enzyme Technology and Green Synthesis Research Group, Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
| | - Roswanira Abdul Wahab
- Enzyme Technology and Green Synthesis Research Group, Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Malaysia.,Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
| | - Azzmer Azzar Abdul Hamid
- Department of Biotechnology, Kulliyyah of Science, International Islamic University Malaysia (IIUM), Kuantan Pahang, Malaysia
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Pedroso da Fontoura L, Puntel R, Pinton S, Silva de Ávila D, Teixeira da Rocha JB, Onofre de Souza D, Roos DH. A toxicological comparison between two uranium compounds in Artemia salina: Artificial seawater containing CaCO 3. MARINE ENVIRONMENTAL RESEARCH 2021; 163:105221. [PMID: 33341237 DOI: 10.1016/j.marenvres.2020.105221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/18/2020] [Accepted: 11/26/2020] [Indexed: 06/12/2023]
Abstract
Uranium (U) mining is an aquatic environmental concern because most of these harmful compounds are discharged into freshwater, reaching the saline environment as the final destination of this contaminated water. Carbonates are present in ocean waters and are essential for benthic organisms, however they may influence the U-induced toxicity. Thus, the aim of this study was to compare the toxicity of uranium nitrate (UN) and uranium acetate (UA) in Artemia salina (AS), which is one of the leading representatives of the marine biota. The cultures of AS (instar II) maintained in artificial seawater containing CaCO3 were exposed for 24 h to different concentrations of U compounds. The results showed that AS were more sensitive to UN (LC50 ≈ 15 μM) when compared with UA (LC50 ≈ 245 μM) indicating higher toxicity of this U compound. Calculated U speciation indicated that Ca2UO2(CO3)3 and (UO2)2CO3(OH)3- complexes predominated under our experimental conditions. The immobilization/lethality was observed after 9 h of exposure for both U compounds. However, only UN caused a significant decrease (≈40%) in the acetylcholinesterase (AChE) activity when compared with control. In order to observe preliminary toxicity effects, we evaluated oxidative stress parameters, such as catalase (CAT) activity, TBARS formation, radical species (RS) generation and cell membrane injury and/or apoptosis (CMI). In this study, we demonstrate that U compounds caused a significant decrease in CAT activity. Similarly, we also observed that UN increased TBARS levels in AS at concentrations 5 times lower than AU (10 μM and 50 μM, respectively). Furthermore, RS generation and CMI were enhanced only on AS treated with UN. Overall, the effects observed here were remarkably significant in AS exposed to UN when compared with AU. In this study, we showed different profiles of toxicity for both U compounds, contributing significantly to the current and scarce understanding of the aquatic ecotoxicity of this heavy metal.
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Affiliation(s)
- Lara Pedroso da Fontoura
- Universidade Federal do Pampa, Campus Uruguaiana, BR-472 Km 592, ZIP code: 97500-970, RS, Brazil
| | - Robson Puntel
- Universidade Federal do Pampa, Campus Uruguaiana, BR-472 Km 592, ZIP code: 97500-970, RS, Brazil
| | - Simone Pinton
- Universidade Federal do Pampa, Campus Uruguaiana, BR-472 Km 592, ZIP code: 97500-970, RS, Brazil
| | - Daiana Silva de Ávila
- Universidade Federal do Pampa, Campus Uruguaiana, BR-472 Km 592, ZIP code: 97500-970, RS, Brazil
| | - João Batista Teixeira da Rocha
- Universidade Federal de Santa Maria, Departamento de bioquímica e biologia celular/CCNE/UFSM, Laboratório de Bioquímica Toxicológica, Farmacologia e Organocalcogênios, ZIP code: 97105900, Santa Maria, RS, Brazil
| | - Diogo Onofre de Souza
- Universidade Federal do Rio Grande do Sul, Instituto de Ciências Básicas da Saúde, Departamento de Bioquímica. Rua Ramiro Barcelos, 2.600 - Anexo Laboratorio 28 Santana, ZIP code: 90035003, Porto Alegre, RS, Brazil
| | - Daniel Henrique Roos
- Universidade Federal do Pampa, Campus Uruguaiana, BR-472 Km 592, ZIP code: 97500-970, RS, Brazil.
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Adsorption mechanism and modelling of hydrocarbon contaminants onto rice straw activated carbons. POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2019. [DOI: 10.2478/pjct-2019-0032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The adsorption of Diphenolic acid (DPA), 2,4-Dichlorophenoxyacetic acid (2,4-D), and 2-methyl-4-chlorophenoxyacetic acid (MCPA) were examined in aqueous solution using activated carbon rice straw. The rice straw was activated by using two reagents, zinc chloride and phosphoric acid and named as RSZ, RSP, respectively. The results showed that both carbons have a relatively high adsorption capacity. Concerning the adsorption kinetic, the second-order model has better fit than the first model to experimental data. The adsorption yield of both carbons increased in the order: DPA < 2,4-D < MCPA. The pore volume diffusion model satisfactorily fitted the experiment on both carbons. Furthermore, solution pH has a high influence on the adsorption capacity for both carbons. The adsorption mechanism of selected pollutants onto carbon samples has been controlled by dispersion interaction π-π electrons and electrostatic interaction, moreover, the contribution of pore volume diffusion is the controlling mechanism of the overall rate of adsorption.
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Chmist J, Szoszkiewicz K, Drożdżyński D. Behavioural Responses of Unio tumidus Freshwater Mussels to Pesticide Contamination. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 77:432-442. [PMID: 31270566 PMCID: PMC6731202 DOI: 10.1007/s00244-019-00649-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 06/23/2019] [Indexed: 05/05/2023]
Abstract
A pesticide is a chemical substance used for the disposal of pests, such as insects, weeds, invertebrates, or rodents. Pesticides interfere with the normal metabolism of the target species; however, some of them may inadvertently affect organisms other than those targeted. Increased quantities of pesticides in water disturb various ecological processes and may increase the mortality rate of various native species of flora and fauna. One of the groups of organisms that are at the greatest risk from the adverse effects of pesticides is the bivalves. This study was designed to assess the behavioural reaction of bivalves to widespread pesticides. As a representative example, the Polish native Unio tumidus (Philipsson 1788) was used. The study investigated different groups of toxic pesticides, such as herbicides (lenacil), insecticides (thiacloprid, DDT and dichlorvos), and fungicides (tebuconazole), in concentrations of 10 mg L-1. The results showed various behavioural reactions of bivalves to the pesticides. The most evident were activity time and shell opening rate. Moreover, as a result of DDVP contamination, effects were recorded in terms of shell opening level as well as rapid onset of death. Among the five analysed plant protection products, the most toxic was DDVP. Its presence caused adductor muscle paralysis in all analysed individuals. The least toxic pesticides were DDT and thiacloprid. A strong reaction to lenacil was observed especially in the shell opening rate. Tebuconazole caused significant reductions in activity. Despite the fact that the impact of pesticides on ecosystems is under regular observation, with the use of a wide range of scientific techniques, the use of bivalves was shown to have considerable potential for water quality monitoring.
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Affiliation(s)
- Joanna Chmist
- Department of Ecology and Environmental Protection, Faculty of Environmental Engineering and Spatial Management, Poznań University of Life Sciences, Wojska Polskiego 28 street, 60-637, Poznań, Poland.
| | - Krzysztof Szoszkiewicz
- Department of Ecology and Environmental Protection, Faculty of Environmental Engineering and Spatial Management, Poznań University of Life Sciences, Wojska Polskiego 28 street, 60-637, Poznań, Poland
| | - Dariusz Drożdżyński
- Institute of Plant Protection in Poznań, Węgorka 20 Street, 60-318, Poznań, Poland
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Comeche A, Martín-Villamil M, Picó Y, Varó I. Effect of methylparaben in Artemia franciscana. Comp Biochem Physiol C Toxicol Pharmacol 2017; 199:98-105. [PMID: 28428009 DOI: 10.1016/j.cbpc.2017.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 03/31/2017] [Accepted: 04/09/2017] [Indexed: 10/19/2022]
Abstract
In this study, the toxicity of methylparaben (MeP) an emerging contaminant, was analysed in the sexual species Artemia franciscana, due to its presence in coastal areas and marine saltworks in the Mediterranean region. The acute toxicity (24h-LC50) of MeP in nauplii was tested and its chronic effect (9days) evaluated by measuring survival and growth under two sublethal concentrations (0.0085 and 0.017mg/L). Also, the effect on several key enzymes involved in: antioxidant defences (catalase (CAT) and gluthathion-S-transferase (GST)), neural activity (cholinesterase (ChE)) and xenobiotic biotransformation (carboxylesterase (CbE), was assessed after 48h under sublethal exposure. The results of acute exposure indicate that MeP is harmful to A. franciscana (24h-LC50=36.7mg/L). MeP causes a decrease in CAT activity after 48h exposure to both concentration tested, that points out at the oxidative stress effect of MeP in A. franciscana. However, no significant effect on ChE, CbE and GST activities was found. In addition, MeP does not affect survival and growth in chronic exposure at the sublethal concentrations tested. The results of this study indicate that MeP is not a threat for A. franciscana under the experimental conditions used. Additional studies should be done considering long-term exposure and reproduction studies to analyse the potential risk of MeP as emerging contaminant in marine and hypersaline environments.
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Affiliation(s)
- Amparo Comeche
- Departamento de Biología, Cultivo y Patología de Especies Marinas, Instituto de Acuicultura Torre de la Sal (IATS-CSIC), 12595 Ribera de Cabanes, Castellón, Spain
| | - María Martín-Villamil
- Departamento de Ciencias Aplicadas y Tecnológicas, Facultad de Veterinaria y Ciencias Experimentales, Universidad Católica de Valencia, Spain
| | - Yolanda Picó
- Grupo de Investigación en Seguridad Alimentaria y Medioambiental (SAMA-UV), Facultad de Farmacia, Universidad de Valencia, Avd. Vicent Andrés Estellés, s/n., 46100 Burjassot, Valencia, Spain
| | - Inma Varó
- Departamento de Biología, Cultivo y Patología de Especies Marinas, Instituto de Acuicultura Torre de la Sal (IATS-CSIC), 12595 Ribera de Cabanes, Castellón, Spain.
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Elbashir AA, Aboul-Enein HY. Application of gas and liquid chromatography coupled to time-of-flight mass spectrometry in pesticides: Multiresidue analysis. Biomed Chromatogr 2017; 32. [DOI: 10.1002/bmc.4038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 05/31/2017] [Accepted: 06/20/2017] [Indexed: 11/11/2022]
Affiliation(s)
| | - Hassan Y. Aboul-Enein
- Pharmaceutical and Medicinal Chemistry Department, Pharmaceutical and Drug Industries Research Division; National Research Centre; Cairo Egypt
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Cruzeiro C, Pardal MÂ, Rodrigues-Oliveira N, Castro LFC, Rocha E, Rocha MJ. Multi-matrix quantification and risk assessment of pesticides in the longest river of the Iberian peninsula. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 572:263-272. [PMID: 27501425 DOI: 10.1016/j.scitotenv.2016.07.203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/26/2016] [Accepted: 07/28/2016] [Indexed: 05/15/2023]
Abstract
The distribution of pesticides in dissolved aqueous phase (DAP), suspended particulate matter (SPM) and Scrobicularia plana soft tissues from the Tagus River estuary was determined to evaluate the chemicals pollution status and their hazard potential in this area. Samples were collected in 6 campaigns (December 2012-October 2013), from 3 strategical sites, and analysed via different extraction procedures followed by gas chromatography tandem mass spectrometry (GC-MS/MS) determination. The contamination profile among matrices (DAP, SPM, and soft tissue from bivalves (STB)) was marked by average concentrations of 345ng/L, 0.51mg/kg, and 0.02mg/kg, respectively, with several samples above the 2013/39/EU Directive of environmental quality standards (EQS); no differences were observed between sex. A wider range of pesticides was present in STB (n=53) than in SPM (n=36) and DAP (n=19) matrices. Sediment-water partition coefficient, bioaccumulation factor in both DAP and SPM fraction were estimated ranging between 2.5 and 4.4 and 0.008-2799, respectively. The spatial distribution of most pesticides and physicochemical parameters were consistent, indicating a pollution pattern primarily near the Trancão River mouth. Due to the presence of the target compounds, calculated risk quotients pointed out potential hazards for aquatic organisms, mainly to invertebrates. The estimated average daily intake, theoretical maximum daily intake, and hazard quotient of the studied pesticides-via bivalve ingestion-indicated no risk for human health, although it is important to note possible biomagnification processes that may happen along the estuarine food-chain.
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Affiliation(s)
- Catarina Cruzeiro
- ICBAS-Institute of Biomedical Sciences Abel Salazar, Department of Microscopy, Laboratory of Histology and Embryology, U.Porto-University of Porto, Rua Jorge Viterbo Ferreira 228, P 4050-313 Porto, Portugal; CIIMAR/CIMAR-Interdisciplinary Centre for Marine and Environmental Research, Group of Histomorphology, Pathophysiology and Applied Toxicology, U.Porto-University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal.
| | - Miguel Ângelo Pardal
- CFE-Centre for Functional Ecology, Department of Life Sciences, UC-University of Coimbra, Calçada Martim de Freitas, P 3000-456 Coimbra, Portugal.
| | - Nádia Rodrigues-Oliveira
- CIIMAR/CIMAR-Interdisciplinary Centre for Marine and Environmental Research, Group of Histomorphology, Pathophysiology and Applied Toxicology, U.Porto-University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal.
| | - L Filipe C Castro
- CIIMAR/CIMAR-Interdisciplinary Centre for Marine and Environmental Research, Group of Histomorphology, Pathophysiology and Applied Toxicology, U.Porto-University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal.
| | - Eduardo Rocha
- ICBAS-Institute of Biomedical Sciences Abel Salazar, Department of Microscopy, Laboratory of Histology and Embryology, U.Porto-University of Porto, Rua Jorge Viterbo Ferreira 228, P 4050-313 Porto, Portugal; CIIMAR/CIMAR-Interdisciplinary Centre for Marine and Environmental Research, Group of Histomorphology, Pathophysiology and Applied Toxicology, U.Porto-University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal.
| | - Maria João Rocha
- ICBAS-Institute of Biomedical Sciences Abel Salazar, Department of Microscopy, Laboratory of Histology and Embryology, U.Porto-University of Porto, Rua Jorge Viterbo Ferreira 228, P 4050-313 Porto, Portugal; CIIMAR/CIMAR-Interdisciplinary Centre for Marine and Environmental Research, Group of Histomorphology, Pathophysiology and Applied Toxicology, U.Porto-University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal.
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Varó I, Redón S, Garcia-Roger EM, Amat F, Guinot D, Serrano R, Navarro JC. Aquatic pollution may favor the success of the invasive species A. franciscana. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 161:208-20. [PMID: 25723047 DOI: 10.1016/j.aquatox.2015.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 02/11/2015] [Accepted: 02/17/2015] [Indexed: 05/06/2023]
Abstract
The genus Artemia consists of several bisexual and parthenogenetic sibling species. One of them, A. franciscana, originally restricted to the New World, becomes invasive when introduced into ecosystems out of its natural range of distribution. Invasiveness is anthropically favored by the use of cryptobiotic eggs in the aquaculture and pet trade. The mechanisms of out-competition of the autochthonous Artemia by the invader are still poorly understood. Ecological fitness may play a pivotal role, but other underlying biotic and abiotic factors may contribute. Since the presence of toxicants in hypersaline aquatic ecosystems has been documented, our aim here is to study the potential role of an organophosphate pesticide, chlorpyrifos, in a congeneric mechanism of competition between the bisexual A. franciscana (AF), and one of the Old World parthenogenetic siblings, A. parthenogenetica (PD). For this purpose we carried out life table experiments with both species, under different concentrations of the toxicant (0.1, 1 and 5μg/l), and analyzed the cholinesterase inhibition at different developmental stages. The results evidence that both, AF and PD, showed an elevated tolerance to high ranges of chlorpyrifos, but AF survived better and its fecundity was less affected by the exposure to the pesticide than that of PD. The higher fecundity of AF is a selective advantage in colonization processes leading to its establishment as NIS. Besides, under the potential selective pressure of abiotic factors, such as the presence of toxicants, its higher resistance in terms of survival and biological fitness also indicates out-competitive advantages.
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Affiliation(s)
- I Varó
- Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Ribera de Cabanes, Castellón 12595 Spain.
| | - S Redón
- Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Ribera de Cabanes, Castellón 12595 Spain
| | - E M Garcia-Roger
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Burjassot, Spain
| | - F Amat
- Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Ribera de Cabanes, Castellón 12595 Spain
| | - D Guinot
- Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Ribera de Cabanes, Castellón 12595 Spain
| | - R Serrano
- Research Institute for Pesticides and Water (IUPA), Avda. Sos Baynat, s/n. University Jaume I, Castellón 12071, Spain
| | - J C Navarro
- Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Ribera de Cabanes, Castellón 12595 Spain
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Hashimoto S, Zushi Y, Fushimi A, Takazawa Y, Tanabe K, Shibata Y. Selective extraction of halogenated compounds from data measured by comprehensive multidimensional gas chromatography/high resolution time-of-flight mass spectrometry for non-target analysis of environmental and biological samples. J Chromatogr A 2013; 1282:183-9. [DOI: 10.1016/j.chroma.2013.01.052] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 10/27/2022]
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