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Huang Z, Zhang S, Chen R, Zhu Q, Shi P, Shen Y. The transporter PHO84/NtPT1 is a target of aluminum to affect phosphorus absorption in Saccharomyces cerevisiae and Nicotiana tabacum L. Metallomics 2023; 15:mfad069. [PMID: 37994650 DOI: 10.1093/mtomcs/mfad069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/21/2023] [Indexed: 11/24/2023]
Abstract
The molecular mechanism of aluminum toxicity in biological systems is not completely understood. Saccharomyces cerevisiae is one of the most used model organisms in the study of environmental metal toxicity. Using an unbiased metallomic approach in yeast, we found that aluminum treatment caused phosphorus deprivation, and the lack of phosphorus increased as the pH of the environment decreased compared to the control strain. By screening the phosphate signaling and response pathway (PHO pathway) in yeast with the synthetic lethality of a new phosphorus-restricted aluminum-sensitive gene, we observed that pho84Δ mutation conferred severe growth defect to aluminum under low-phosphorus conditions, and the addition of phosphate alleviated this sensitivity. Subsequently, the data showed that PHO84 determined the intracellular aluminum-induced phosphorus deficiency, and the expression of PHO84 was positively correlated with aluminum stress, which was mediated by phosphorus through the coordinated regulation of PHO4/PHO2. Moreover, aluminum reduced phosphorus absorption and inhibited tobacco plant growth in acidic media. In addition, the high-affinity phosphate transporter NtPT1 in tobacco exhibited similar effects to PHO84, and overexpression of NtPT1 conferred aluminum resistance in yeast cells. Taken together, positive feedback regulation of the PHO pathway centered on the high-affinity phosphate transporters is a highly conservative mechanism in response to aluminum toxicity. The results may provide a basis for aluminum-resistant microorganisms or plant engineering and acidic soil treatment.
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Affiliation(s)
- Zhiwei Huang
- College of Biological Science and Medical Engineering, Donghua University, 2999 Renmin Road, Shanghai 201620, China
| | - Shixuan Zhang
- College of Biological Science and Medical Engineering, Donghua University, 2999 Renmin Road, Shanghai 201620, China
| | - Ranran Chen
- College of Biological Science and Medical Engineering, Donghua University, 2999 Renmin Road, Shanghai 201620, China
| | - Qian Zhu
- College of Biological Science and Medical Engineering, Donghua University, 2999 Renmin Road, Shanghai 201620, China
| | - Ping Shi
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yuhu Shen
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Xining 810008, China
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Dai M, Liu J, Zhang L, Tan Y, Yan J, Wang J, Nian H. Transcriptome analysis of Cryptococcus humicola under aluminum stress revealed the potential role of the cell wall in aluminum tolerance. Metallomics 2020; 12:1370-1379. [PMID: 32608423 DOI: 10.1039/d0mt00042f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aluminum (Al) toxicity is one of the most important limiting factors for crop yield in acidic soils. Bound Al gets converted into a toxic ionic state (Al3+) in acidic soil. Recent studies have shown that Al can act on the cell walls, cell membranes, organelles, and nuclei of microorganisms and affect substance and energy metabolism. To explore the gene expression at the transcriptional level under Al stress, we sequenced the transcriptome of Cryptococcus humicola, which is a highly Al-resistant yeast strain isolated from acidic soil and tolerates up to 200 mM Al3+. The screening conditions for genes from the control and experimental group were a false discovery rate (FDR) <0.05 and log 2|FC| > 1. A total of 4760 genes were differentially expressed, among which 3066 were upregulated and 1694 were downregulated. These genes control glycometabolism, protein synthesis, lipid metabolism and signalling pathways. Eleven selected differentially expressed genes were further validated using qRT-PCR. The results suggested that Al stress leads to complex responses in C. humicola. The effects of Al on the β-d-glucan and mannose contents and Al accumulation in the cell wall were determined. With an increase in the Al treatment time and concentration, the contents of β-d-glucan and mannose showed a trend of first increasing and then decreasing. Under Al treatment, the Al content of the cell wall also showed a trend of first increasing and then decreasing. These results suggested that Al accumulates in the cell wall and the cell wall plays a vital role in the Al resistance of C. humicola. The differentially expressed genes provide a foundation for the further study of Al tolerance in C. humicola.
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Affiliation(s)
- Mengyao Dai
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| | - Jia Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| | - Lei Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| | - Yong Tan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| | - Jinping Yan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| | - Juyuan Wang
- Liaocheng University, Liaocheng, 252000, China
| | - Hongjuan Nian
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
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Tranter D, Filipuzzi I, Lochmann T, Knapp B, Kellosalo J, Estoppey D, Pistorius D, Meissner A, Paavilainen VO, Hoepfner D. Kendomycin Cytotoxicity against Bacterial, Fungal, and Mammalian Cells Is Due to Cation Chelation. JOURNAL OF NATURAL PRODUCTS 2020; 83:965-971. [PMID: 32182062 PMCID: PMC7497661 DOI: 10.1021/acs.jnatprod.9b00826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Indexed: 06/10/2023]
Abstract
Kendomycin is a small-molecule natural product that has gained significant attention due to reported cytotoxicity against pathogenic bacteria and fungi as well as a number of cancer cell lines. Despite significant biomedical interest and attempts to reveal its mechanism of action, the cellular target of kendomycin remains disputed. Herein it is shown that kendomycin induces cellular responses indicative of cation stress comparable to the effects of established iron chelators. Furthermore, addition of excess iron and copper attenuated kendomycin cytotoxicity in bacteria, yeast, and mammalian cells. Finally, NMR analysis demonstrated a direct interaction with cations, corroborating a close link between the observed kendomycin polypharmacology across different species and modulation of iron and/or copper levels.
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Affiliation(s)
- Dale Tranter
- Institute
of Biotechnology, University of Helsinki, Helsinki, 00014, Finland
| | - Ireos Filipuzzi
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Thomas Lochmann
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Britta Knapp
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Juho Kellosalo
- Institute
of Biotechnology, University of Helsinki, Helsinki, 00014, Finland
| | - David Estoppey
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Dominik Pistorius
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Axel Meissner
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
| | | | - Dominic Hoepfner
- Novartis
Institutes for BioMedical Research, 4056 Basel, Switzerland
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Johnson AJ, Zaman MS, Veljanoski F, Phrakaysone AA, Li S, O'Doherty PJ, Petersingham G, Perrone GG, Molloy MP, Wu MJ. Unravelling the role of protein kinase CK2 in metal toxicity using gene deletion mutants. Metallomics 2017; 9:301-308. [PMID: 28194465 DOI: 10.1039/c6mt00230g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Metal ions, biologically essential or toxic, are present in the surrounding environment of living organisms. Understanding their uptake, homeostasis or detoxification is critical in cell biology and human health. In this study, we investigated the role of protein kinase CK2 in metal toxicity using gene deletion strains of Saccharomyces cerevisiae against a panel of six metal ions. The deletion of CKA2, the yeast orthologue of mammalian CK2α', leads to a pronounced resistant phenotype against Zn2+ and Al3+, whilst the deletion of CKB1 or CKB2 results in tolerance to Cr6+ and As3+. The individual deletion mutants of CK2 subunits (CKA1, CKA2, CKB1 and CKB2) did not have any benefit against Co2+ and Cd2+. The metal ion content in the treated cells was then measured by inductively coupled plasma mass spectrometry. Two contrasting findings were obtained for the CKA2 deletion mutant (cka2Δ) against Al3+ or Zn2+. Upon exposure to Al3+, cka2Δ had markedly lower Al3+ content than the wild type and other CK2 mutants, congruous to the resistant phenotype of cka2Δ against Al3+, indicating that CKA2 is responsible for Al3+ uptake. Upon zinc exposure the same mutant showed similar Zn2+ content to the wild type and cka1Δ. Strikingly, the selective inhibitor of CK2 TBB (4,5,6,7-tetrabromo-1H-benzotriazole) abolished the resistant phenotype of cka2Δ against Zn2+. Hence, the CK2 subunit CKA1 plays a key role in Zn2+ sequestration of the cell. Given that both zinc and CK2 are implicated in cancer development, the findings herein are of significance to cancer research and anticancer drug development.
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Affiliation(s)
- Adam J Johnson
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Mohammad S Zaman
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Filip Veljanoski
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Alex A Phrakaysone
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Suhua Li
- College of Life Sciences, Southwest Forestry University, 300 Bailong Road, Kunming 650024, Yunnan Province, P. R. China
| | - Patrick J O'Doherty
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Gayani Petersingham
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Gabriel G Perrone
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Mark P Molloy
- Australian Proteome Analysis Facility (APAF), Dept. Chemistry and Biomolecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Ming J Wu
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia. and Molecular Medicine Research Group, School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
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Johnson AJ, Veljanoski F, O'Doherty PJ, Zaman MS, Petersingham G, Bailey TD, Münch G, Kersaitis C, Wu MJ. Molecular insight into arsenic toxicity via the genome-wide deletion mutant screening of Saccharomyces cerevisiae. Metallomics 2016; 8:228-35. [PMID: 26688044 DOI: 10.1039/c5mt00261c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Arsenic is omnipresent in soil, air, food and water. Chronic exposure to arsenic is a serious problem to human health. In-depth understanding of this metalloid's toxicity is a fundamental step towards development of arsenic-free foods and measures for bioremediation. By screening the complete set of gene deletion mutants (4873) of Saccharomyces cerevisiae, this study uncovered 75 sensitive and 39 resistant mutants against arsenite [As(III)]. Functional analysis of the corresponding genes revealed the molecular details for its uptake, toxicity and detoxification. On the basis of the hypersensitivity of yap3Δ, the transcription factor, Yap3p, is for the first time linked to the cell's detoxification against As(III). Apart from confirming the previously described role of the mitogen-activated protein kinase (MAPK) Hog1 pathway in combating arsenic toxicity, the results show that the regulatory subunits (Ckb1p and Ckb2p) of protein kinase CK2 are also involved in the process, suggesting possible crosstalk between the two key protein kinases. The sensitivity to As(III) conferred by deletion of the genes involved in protein degradation and chromatin remodelling demonstrates protein damage is the key mode of toxicity for the metalloid. Furthermore, the resistant phenotype of fps1Δ, snf3Δ and pho81Δ against As(III) links arsenic uptake with the corresponding plasma membrane-bound transporters-aquaglyceroporin (Fps1p), hexose (Snf3p) and phosphate transporters. The molecular details obtained in this screen for As(III) uptake, detoxification and toxicity provide the basis for future investigations into arsenic-related problems in the environment, agriculture and human health.
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Affiliation(s)
- Adam J Johnson
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Filip Veljanoski
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Patrick J O'Doherty
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Mohammad S Zaman
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Gayani Petersingham
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Trevor D Bailey
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Gerald Münch
- Department of Pharmacology, School of Medicine and Molecular Medicine Research Group, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Cindy Kersaitis
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Ming J Wu
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
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Johnson AJ, Veljanoski F, O'Doherty PJ, Zaman MS, Petersingham G, Bailey TD, Münch G, Kersaitis C, Wu MJ. Revelation of molecular basis for chromium toxicity by phenotypes of Saccharomyces cerevisiae gene deletion mutants. Metallomics 2016; 8:542-50. [DOI: 10.1039/c6mt00039h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Tun NM, O'Doherty PJ, Chen ZH, Wu XY, Bailey TD, Kersaitis C, Wu MJ. Identification of aluminium transport-related genes via genome-wide phenotypic screening of Saccharomyces cerevisiae. Metallomics 2015; 6:1558-64. [PMID: 24926745 DOI: 10.1039/c4mt00116h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Genome-wide screening using gene deletion mutants has been widely carried out with numerous toxicants including oxidants and metal ions. The focus of such studies usually centres on identifying sensitive phenotypes against a given toxicant. Here, we screened the complete collection of yeast gene deletion mutants (5047) with increasing concentrations of aluminium sulphate (0.4, 0.8, 1.6 and 3.2 mM) in order to discover aluminium (Al(3+)) tolerant phenotypes. Fifteen genes were found to be associated with Al(3+) transport because their deletion mutants exhibited Al(3+) tolerance, including lem3Δ, hal5Δ and cka2Δ. Deletion of CKA2, a catalytic subunit of tetrameric protein kinase CK2, gives rise to the most pronounced resistance to Al(3+) by showing significantly higher growth compared to the wild type. Functional analysis revealed that both molecular regulation and endocytosis are involved in Al(3+) transport for yeast. Further investigations were extended to all the four subunits of CK2 (CKA1, CKA2, CKB1 and CKB2) and the other 14 identified mutants under a spectrum of metal ions, including Al(3+), Zn(2+), Mn(2+), Fe(2+), Fe(3+), Co(3+), Ga(3+), Cd(2+), In(3+), Ni(2+) and Cu(2+), as well as hydrogen peroxide and diamide, in order to unravel cross-tolerance amongst metal ions and the effect of the oxidants. Finally, the implication of the findings in Al(3+) transport for the other species like plants and humans is discussed.
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Affiliation(s)
- Nay M Tun
- School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia.
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8
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Tun N, Lennon B, O'Doherty P, Johnson A, Petersingham G, Bailey T, Kersaitis C, Wu M. Effects of metal ions and hydrogen peroxide on the phenotype of yeast hom6
Δ mutant. Lett Appl Microbiol 2014; 60:20-6. [DOI: 10.1111/lam.12336] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 09/03/2014] [Accepted: 09/25/2014] [Indexed: 11/29/2022]
Affiliation(s)
- N.M. Tun
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - B.R. Lennon
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - P.J. O'Doherty
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - A.J. Johnson
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - G. Petersingham
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - T.D. Bailey
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - C. Kersaitis
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
| | - M.J. Wu
- School of Science and Health; University of Western Sydney; Penrith NSW Australia
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de Souza RB, de Menezes JAS, de Souza RDFR, Dutra ED, de Morais MA. Mineral composition of the sugarcane juice and its influence on the ethanol fermentation. Appl Biochem Biotechnol 2014; 175:209-22. [PMID: 25248994 DOI: 10.1007/s12010-014-1258-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
Abstract
In the present work, we evaluated the mineral composition of three sugarcane varieties from different areas in northeast Brazil and their influence on the fermentation performance of Saccharomyces cerevisiae. The mineral composition was homogeneous in the different areas investigated. However, large variation coefficients were observed for concentrations of copper, magnesium, zinc and phosphorus. Regarding the fermentation performances, the sugarcane juices with the highest magnesium concentration showed the highest ethanol yield. Synthetic media supplemented with magnesium also showed the highest yield (0.45 g g(-1)) while the excess of copper led to the lowest yield (0.35 g g(-1)). According to our results, the magnesium is the principal responsible for the increase on the ethanol yield, and it also seems to be able to disguise the inhibitory effects of the toxic minerals present in the sugarcane juice.
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Affiliation(s)
- Rafael Barros de Souza
- Interdepartmental Research Group in Metabolic Engineering, Department of Genetics, Federal University of Pernambuco, Av. Prof. Moraes Rego, 1235, 50670-901, Recife, PE, Brazil
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Gaytán BD, Vulpe CD. Functional toxicology: tools to advance the future of toxicity testing. Front Genet 2014; 5:110. [PMID: 24847352 PMCID: PMC4017141 DOI: 10.3389/fgene.2014.00110] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 04/12/2014] [Indexed: 11/16/2022] Open
Abstract
The increased presence of chemical contaminants in the environment is an undeniable concern to human health and ecosystems. Historically, by relying heavily upon costly and laborious animal-based toxicity assays, the field of toxicology has often neglected examinations of the cellular and molecular mechanisms of toxicity for the majority of compounds—information that, if available, would strengthen risk assessment analyses. Functional toxicology, where cells or organisms with gene deletions or depleted proteins are used to assess genetic requirements for chemical tolerance, can advance the field of toxicity testing by contributing data regarding chemical mechanisms of toxicity. Functional toxicology can be accomplished using available genetic tools in yeasts, other fungi and bacteria, and eukaryotes of increased complexity, including zebrafish, fruit flies, rodents, and human cell lines. Underscored is the value of using less complex systems such as yeasts to direct further studies in more complex systems such as human cell lines. Functional techniques can yield (1) novel insights into chemical toxicity; (2) pathways and mechanisms deserving of further study; and (3) candidate human toxicant susceptibility or resistance genes.
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Affiliation(s)
- Brandon D Gaytán
- Department of Nutritional Science and Toxicology, University of California Berkeley Berkeley, CA, USA
| | - Chris D Vulpe
- Department of Nutritional Science and Toxicology, University of California Berkeley Berkeley, CA, USA
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Magnier A, Fekete V, Van Loco J, Bolle F, Elskens M. Speciation study of aluminium in beverages by Competitive Ligand Exchange–Adsorptive Stripping Voltammetry. Talanta 2014; 122:30-5. [DOI: 10.1016/j.talanta.2013.12.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 12/16/2013] [Accepted: 12/24/2013] [Indexed: 11/24/2022]
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