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Imran. Lead stabilization and remediation strategy with soil amendment in situ immobilization in contaminated range lands. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024:1-10. [PMID: 38944679 DOI: 10.1080/15226514.2024.2372850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/01/2024]
Abstract
In situ immobilization is a potential approach that can be used to remediate low-to-medium levels of heavy-metal in contaminated-soil. There is little known about how modifications to soil characteristics may affect Pb's release from soil. The four different amendments, triple-superphosphate and attapulgite were combined in Ad-1; zeolite and triple-superphosphate were in Ad-2; hydroxyapatite and humus were in Ad-3; and nano-carbon. These amendments are mostly made of phyllosilicate minerals, humus, base minerals, and nano-carbon, respectively. Results revealed that the test amendments' maximal Pb-adsorption capacity varied from 7.47 to 17.67 mg g-1. Surface precipitation and ion-exchange were found to be the main mechanisms for Pb-adsorption by Ad-1 and Ad-2, while Ad-3 and Ad-4 were promising among the all, according to analysis of the modifications both before and after Pb loading. When the pH dropped (7-1) or the ion-strength rose (0-0.2 M), there was a discernible rise in the Pb-desorption percentages from the amendments. It was determined that Ad-3 and Ad-4 were more effective in situ immobilizing lead in contaminated-soils because of their high adsorption capacities (12.82 and 17.67 mg g-1) and low-desorption percentages (4.46-6.23%) at ion-strengths of 0.01-0.1 mol L-1 and pH levels ranging from 5 to 7.
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Affiliation(s)
- Imran
- College of Engineering, South China Agriculture University, Guangzhou, China
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2
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Gordon O, Gibbons J, Lamp J, Lantz AW. Sorting and simultaneous quantitation of intact mixed-cell samples via capillary isotachophoresis. Electrophoresis 2024; 45:537-547. [PMID: 37946590 DOI: 10.1002/elps.202300159] [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: 07/19/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/12/2023]
Abstract
A great need currently exists for rapid, inexpensive, and accurate methods for microbial analysis in the medical, food, industrial, and water quality fields. Here, a novel capillary isotachophoresis (CITP) method is presented for the focusing, sorting, and quantitation of intact cells in mixed samples based on their electrophoretic mobility ranges. Using a series of ion spacers dissolved in the sample, this technique results in several efficient cell peaks in the electropherogram corresponding to specific cell electrophoretic mobility ranges. The concentrations of different species in mixed-cell samples are determined from the cell peak areas and the known peak response factors for the cell species using a series of linear equations. Method design and optimization are discussed, including the choice of running buffer, pH, and ion spacers. Mixed-cell samples of up to four different species were focused and quantified as a proof-of-principle of the method. When sample cell concentrations were toward the middle of the linear response range, accuracies between 1% and 11% and relative standard deviations of 1%-14% were obtained, depending on the number of cell species in the mixture. This work provides a useful basis for future studies of cell quantitation using CITP, which could be potentially applied to a variety of fields including cell growth studies, microbial contamination testing, and sterility testing.
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Affiliation(s)
- Olivia Gordon
- Department of Chemistry, Grand Valley State University, Allendale, Michigan, USA
| | - Joshua Gibbons
- Department of Chemistry, Grand Valley State University, Allendale, Michigan, USA
| | - Jared Lamp
- Department of Chemistry, Grand Valley State University, Allendale, Michigan, USA
| | - Andrew W Lantz
- Department of Chemistry, Grand Valley State University, Allendale, Michigan, USA
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3
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Šalplachta J, Kubesová A, Moravcová D, Duša F. Analysis of fungi by capillary electrophoresis. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.116947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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4
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Classification of clinical Cutibacterium acnes isolates at phylotype level by capillary electrophoretic methods in roughened fused silica capillary. Talanta 2022; 247:123565. [DOI: 10.1016/j.talanta.2022.123565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/11/2022] [Accepted: 05/16/2022] [Indexed: 11/22/2022]
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5
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Horká M, Růžička F, Siváková A, Karásek P, Šalplachta J, Pantůček R, Roth M. Capillary electrophoretic methods for classification of methicillin-resistant Staphylococcus aureus (MRSA) clones. Anal Chim Acta 2022; 1227:340305. [DOI: 10.1016/j.aca.2022.340305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/19/2022] [Accepted: 08/20/2022] [Indexed: 11/26/2022]
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6
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Horká M, Šalplachta J, Karásek P, Roth M. Sensitive identification of milk protein allergens using on-line combination of transient isotachophoresis/micellar electrokinetic chromatography and capillary isoelectric focusing in fused silica capillary with roughened part. Food Chem 2022; 377:131986. [PMID: 34998151 DOI: 10.1016/j.foodchem.2021.131986] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/27/2021] [Accepted: 12/28/2021] [Indexed: 11/04/2022]
Abstract
A method for on-line concentration of milk proteins from large sample volumes using combination of transient isotachophoresis (tITP) and micellar electrokinetic chromatography (MEKC) in fused silica capillary with an inner roughened part has been developed. The method utilizes reversible dynamic adsorption of proteins onto a thin layer of PEG 4000 on the roughened surface of the capillary. In addition, the tITP/MEKC method was combined with capillary isoelectric focusing (CIEF) for on-line concentration, separation, identification and sensitive determination of proteins in skimmed milk. The method allows analysis of up to 50 μL of sample. This study has focused on the four important whey proteins, bovine serum albumin (BSA), α-lactalbumin (α-LA), and two genetic variants of β-lactoglobulin (β-LG A and β-LG B). The proteins were identified on the basis of their migration times and characteristic pI values. The pI values of BSA, α-LA, β-LG A, and β-LG B were determined as 4.7, 4.4, 5.1, and 5.2, respectively. Limits of detection for BSA, α-LA and both β-LG variants were found as 1.2, 1.0 and 1.0 pg mL-1, respectively. The linearity of calibration curves was characterized by the R2 = 0.9982. The method provided highly reproducible results as the relative standard deviations of the migration times and peak areas of the examined proteins did not exceed 1.6%.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic.
| | - Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Pavel Karásek
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
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7
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Duša F, Šalplachta J, Horká M, Lunerová K, Rosenbergová K, Kubíček O. Novel chip-based isoelectric focusing device for fractionation of bacteria prior to their mass spectrometry identification. Anal Chim Acta 2022; 1192:339333. [DOI: 10.1016/j.aca.2021.339333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 11/01/2022]
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8
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Enhanced E. coli Capturing Efficacy Over Magnetic Dextrin–Cobalt Sulfide Nanohybrid as a Promising Water Disinfection System. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-01876-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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9
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Šalplachta J, Horká M, Karásek P, Růžička F, Roth M. Identification of Aspergillus Conidia in Bronchoalveolar Lavage Using Offline Combination of Capillary Electrophoresis in Supercritical Water-Treated Fused Silica Capillary and Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. Anal Chem 2020; 92:7588-7595. [PMID: 32384240 DOI: 10.1021/acs.analchem.0c00165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Diagnosis of fungal infection in lung parenchyma is relatively difficult. Bronchoscopy with bronchoalveolar lavage is very useful in its diagnosing. Therefore, a method for rapid online concentration and analysis of Aspergillus conidia in bronchoalveolar lavage fluid using the combination of transient isotachophoresis (tITP) and micellar electrokinetic chromatography (MEKC) with subsequent off-line identification of the separated conidia by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is described in this study. In the proposed procedure, conidia were first dynamically adhered onto the roughened part of the inner surface of a fused silica capillary prepared by etching with supercritical water. Then the adhered conidia were desorbed, concentrated, and separated using a combination of tITP and MEKC. Finally, the fractions containing the separated conidia were collected from the capillary and analyzed by MALDI-TOF MS. The adhesion efficiency under the optimized experimental conditions was about 80%. This rapid diagnosis will contribute to timely initiation of therapy and increase the patient's chances of survival.
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Affiliation(s)
- Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Marie Horká
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Pavel Karásek
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Filip Růžička
- Department of Microbiology, Faculty of Medicine, Masaryk University, Kamenice 53/5, 625 00 Brno, Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
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Horká M, Šalplachta J, Karásek P, Ru̇žička F, Roth M. Online Concentration of Bacteria from Tens of Microliter Sample Volumes in Roughened Fused Silica Capillary with Subsequent Analysis by Capillary Electrophoresis and Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. ACS Infect Dis 2020; 6:355-365. [PMID: 31887008 DOI: 10.1021/acsinfecdis.9b00200] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This study presents a timely, reliable, and sensitive method for identification of pathogenic bacteria in clinical samples based on a combination of capillary electrophoresis with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. In this respect, a part of a single-piece fused silica capillary was etched with supercritical water with the aim of using it for static or dynamic cell-surface adhesion from tens of microliter sample volumes. The conditions for this procedure were optimized. Adhered cells of Staphylococcus aureus (methicillin-susceptible or methicillin-resistant) and of Pseudomonas aeruginosa were desorbed and preconcentrated from the rough part of the capillary surface using transient isotachophoretic stacking from a high conductivity model matrix. The charged cells were swep and separated again in micellar electrokinetic chromatography using a nonionogenic surfactant. Static adhesion of the cells onto the roughened part of the capillary is certainly volumetric limited. Dynamic adhesion allows the concentration of bacteria from 100 μL volumes of physiological saline solution, bovine serum, or human blood with the limits of detection at 1.8 × 102, 1.7 × 103, and 1.0 × 103 cells mL-1, respectively. The limits of detection were the same for all three examined bacterial strains. The recovery of the method was about 83% and it was independent of the sample matrix. A combination of capillary electrophoresis with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry required at least 4 × 103 cells mL-1 to obtain reliable results. The calibration plots were linear (R2 = 0.99) and the relative standard deviations of the peak area were at most 2.2%. The adhered bacteria, either individual or in a mixture, were online analyzed by micellar electrokinetic chromatography and then collected from the capillary and off-line analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry without interfering matrix components.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Pavel Karásek
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
| | - Filip Ru̇žička
- The Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne’s University Hospital, Brno, Pekařská 53, 602 00 Brno, Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00 Brno, Czech Republic
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11
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Horká M, Karásek P, Šalplachta J, Růžička F, Štveráková D, Pantůček R, Roth M. Nano-etched fused-silica capillary used for on-line preconcentration and electrophoretic separation of bacteriophages from large blood sample volumes with off-line MALDI-TOF mass spectrometry identification. Mikrochim Acta 2020; 187:177. [PMID: 32076849 DOI: 10.1007/s00604-020-4154-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 02/05/2020] [Indexed: 01/09/2023]
Abstract
The properties of staphylococcal phages from the Siphoviridae, Podoviridae, and Myoviridae families were monitored using capillary electrophoretic methods on fused-silica capillaries with different morphology of surface roughness. Isoelectric points of the examined phages were determined by capillary isoelectric focusing in the original, smooth fused-silica capillary, and they ranged from 3.30 to 3.85. For capillary electrophoresis of phages, fused-silica capillaries with the "pock" and "cone" roughened surface types were prepared by etching a part of the capillary with supercritical water. The best resolution of the individual phages (to range from 3.2 to 4.6) was achieved with the "cone" surface-type fused-silica capillary. Direct application of phage K1/420 at the infection site, represented by human plasma or full blood spiked with Staphylococcus aureus, was on-line monitored by micellar electrokinetic chromatography. The phage particles were dynamically adhered onto the roughened surface of the capillary from 10 μL of the prepared sample at the optimized flow rate of 6.5 μL min-1. The limit of detection was determined to be 104 phage particles. The linearity of the calibration lines was characterized by the regression coefficient, R2 = 0.998. The relative standard deviation (RSD) of the peak area, calculated from ten independent measurements, was (±) 2%. After analysis, viability of the detected phages was verified by the modified "double-layer drop assay" method, and collected phage fractions were simultaneously off-line analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Graphical abstract.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00, Brno, Czech Republic.
| | - Pavel Karásek
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00, Brno, Czech Republic
| | - Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00, Brno, Czech Republic
| | - Filip Růžička
- Department of Microbiology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Dana Štveráková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
| | - Roman Pantůček
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the CAS, Veveří 97, 602 00, Brno, Czech Republic
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12
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Horká M, Šalplachta J, Růžička F, Šlais K. Utilization of Red Nonionogenic Tenside Labeling, Isoelectric Focusing, and Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry in the Identification of Uropathogens in the Presence of a High Level of Albumin. ACS Infect Dis 2019; 5:1348-1356. [PMID: 31243987 DOI: 10.1021/acsinfecdis.9b00045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Cellulose-based preparative isoelectric focusing was used for preseparation and concentration of uropathogens Staphylococcus aureus, Escherichia coli, Enterococcus faecalis, Staphylococcus epidermidis, Candida albicans, and Candida parapsilosis in a urine sample containing a high concentration of human serum albumin. For the visibility of the colorless microbial zones in the separation medium, the microbial cells were labeled with red nonionogenic tenside (1-[[4-(phenylazo)phenyl]azo]-2-hydroxy-3-naphthoic acid polyethylene glycol ester, PAPAN). A very short incubation time, about 2 min, was sufficient for the adsorption of 0.001% (w/v) PAPAN onto the cell surface at the optimized conditions. As low as 103 cells of E. coli (pI 4.6) resuspended in 100 μL of urine sample and spiked with 0.1 mg mL-1 of human serum albumin (pI 4.8) were successfully preseparated and concentrated using this method. Because the pI values of the labeled microorganisms remained unchanged, the focused red zones of microbial cells were collected from the separation media and further analyzed by either capillary isoelectric focusing or matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The viability of the cells extracted from the collected zones was also confirmed. The proposed method provides reliable, relatively fast, and cost-effective identification of uropathogens in urine specimens with a high level of albumin.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic
| | - Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic
| | - Filip Růžička
- The Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne’s University Hospital, Pekařská 53, 602 00 Brno, Czech Republic
| | - Karel Šlais
- Institute of Analytical Chemistry of the CAS, v. v. i., Veveří 97, 602 00 Brno, Czech Republic
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Šalplachta J, Horká M, Šlais K. Capillary electrophoresis with preparative isoelectric focusing preconcentration for sensitive determination of amphotericin B in human blood serum. Anal Chim Acta 2019; 1053:162-168. [DOI: 10.1016/j.aca.2018.12.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 11/06/2018] [Accepted: 12/09/2018] [Indexed: 12/15/2022]
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14
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Synthesis and evaluation of the antibacterial effect of silica-coated modified magnetic poly-(amidoamine) G5 nanoparticles on E. coli and S. aureus. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Marie H, Dana Š, Jiří Š, Karel Š, Marta Š, Filip R, Roman P. Electrophoretic techniques for purification, separation and detection of Kayvirus with subsequent control by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and microbiological methods. J Chromatogr A 2018; 1570:155-163. [DOI: 10.1016/j.chroma.2018.07.078] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/25/2018] [Accepted: 07/28/2018] [Indexed: 12/17/2022]
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16
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Horká M, Šalplachta J, Růžička F, Šlais K. Preparative and capillary isoelectric focusing for detection and identification of Aspergillus conidia in complex sample matrices. J Sep Sci 2018; 41:4203-4211. [PMID: 30194717 DOI: 10.1002/jssc.201800547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 09/05/2018] [Accepted: 09/05/2018] [Indexed: 02/06/2023]
Abstract
This study describes a new method for fast identification of highly hydrophobic conidia of Aspergillus species from both simple and complex matrices. The method is based on recently developed preparative isoelectric focusing in a cellulose-based separation medium which had to be modified with respect to the highly hydrophobic surface of the conidia. Although Aspergillus conidia are colored, their zones in the cellulose bed were indicated by colored isoelectric point markers. The isoelectric point values of Aspergillus conidia were determined by capillary isoelectric focusing. Preparative isoelectric focusing was successfully used for preconcentration of individual conidia of cultivated strains of Aspergillus niger, Aspergillus fumigatus, Aspergillus flavus, and Aspergillus parasiticus, and also for separation of the conidia in a mixture. Subsequently, red pepper powder and peanuts spiked with Aspergillus niger and Aspergillus flavus conidia, respectively, were used as complex matrices. The detection limit for identification of the conidia in these complex matrices is 104 conidia mL-1 . The presence of conidia in the focused zones was confirmed by their subsequent analysis by capillary isoelectric focusing. Their viability was confirmed by a cultivation of the conidia extracted from the collected fractions after preparative isoelectric focusing.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
| | - Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
| | - Filip Růžička
- The Department of Microbiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Karel Šlais
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
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Adsorption and Desorption of Cd by Soil Amendment: Mechanisms and Environmental Implications in Field-Soil Remediation. SUSTAINABILITY 2018. [DOI: 10.3390/su10072337] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In China, 1/5 of the total farmland area is Cd-enriched; the wide occurrence of Cd-contaminated soil in China has already posed significant public health risk and deserves immediate action. In situ immobilization has been regarded as one of the most promising agricultural extension-technologies for remediating low-to-medium levels of heavy metal contaminated land in China. Although extensive research has been conducted to examine the effectiveness of different amendments on remediation of Cd-contaminated soils, the influence of changed soil properties on secondary release of Cd from Cd-amendment to soil is rarely known. The objective of this study was to evaluate the effectiveness of four soil amendments (denoted as Ad1, Ad2, Ad3 and Ad4, their main components being clay mineral, base mineral, humus and biochar, respectively) on reducing Cd availability and increasing Cd stability in soil. The maximum adsorption capacity of test amendments on Cd ranged from 7.47 to 17.67 mg g−1. The characterizations of test amendments before and after Cd loading provided the evidence that surface precipitation and ion exchange were the main reasons for Ad1 and Ad2 to adsorb Cd, and complexation was for Ad3 and Ad4. In addition, there was significant increase in the desorption percentages of Cd from amendments as pH decreased (from 7 to 1) or ion strength increased (from 0 to 0.2 M). Comparatively, Ad3 and Ad4 could be more effective for in situ immobilization of Cd in contaminated soils, due to their high adsorption capacities (12.82 and 17.67 mg g−1, respectively) and low desorption percentages (4.46–6.23%) at pH from 5 to 7 and ion strengths from 0.01 to 0.1 mol L−1. The results obtained in this study could provide a guideline for in-situ remediation of Cd polluted field-soil in China.
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Kahle J, Wätzig H. Determination of protein charge variants with (imaged) capillary isoelectric focusing and capillary zone electrophoresis. Electrophoresis 2018; 39:2492-2511. [DOI: 10.1002/elps.201800079] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/03/2018] [Accepted: 04/17/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Julia Kahle
- Technische Universität Braunschweig; Institute of Medicinal and Pharmaceutical Chemistry; Braunschweig Germany
| | - Hermann Wätzig
- Technische Universität Braunschweig; Institute of Medicinal and Pharmaceutical Chemistry; Braunschweig Germany
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Gao X, Yao X, Zhong Z, Jia L. Rapid and sensitive detection of Staphylococcus aureus assisted by polydopamine modified magnetic nanoparticles. Talanta 2018; 186:147-153. [PMID: 29784342 DOI: 10.1016/j.talanta.2018.04.046] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/08/2018] [Accepted: 04/15/2018] [Indexed: 10/17/2022]
Abstract
Pathogens cause significant morbidity and mortality to humans. Thus, development of fast and reliable methods for detection and identification of pathogens is urgently needed to increase protection level of public health and ensure the safety of consumers. Herein, a rapid and sensitive method has been developed for Staphylococcus aureus (S. aureus) detection based on the dual role of polydopamine modified magnetic nanoparticles (PDA@Fe3O4 NPs) combined with polymerase chain reaction (PCR) and capillary electrophoresis (CE). The core-shell type structure PDA@Fe3O4 NPs were prepared, which are spherical, about 152 ± 20 nm in diameter and the PDA shell is about 17.5 ± 1.6 nm. PDA@Fe3O4 NPs play a dual role including efficient capture of bacteria and extraction of DNA. In the pH range of 3.0-7.0, the capture efficiency of S. aureus by PDA@Fe3O4 NPs was more than 95% in 5 min. The adsorption capacity of the PDA@Fe3O4 NPs for S. aureus is 1.2 × 108 cfu mg-1. The efficient capture and concentration of bacteria from large volumes of samples by PDA@Fe3O4 NPs avoids the time-consuming culture-enrichment prior to PCR. Interestingly, PDA@Fe3O4 NPs were also found to be efficient adsorbents for extraction of genomic DNA from pathogens based on the electrostatic interaction. The process can be finished in 25 min. The PDA@Fe3O4 NPs based solid phase extraction combined with PCR and CE allows for detecting the order of 102 cfu mL-1S. aureus in tap water and orange juice samples. The whole process takes < 5.5 h. The developed method would provide a promising platform for rapid and sensitive detection of pathogens.
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Affiliation(s)
- Xiaomei Gao
- Ministry of Education Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Xin Yao
- Ministry of Education Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Zitao Zhong
- Ministry of Education Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Li Jia
- Ministry of Education Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China.
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Horká M, Karásek P, Roth M, Růžička F. Pre-concentration and separation of bacteria by volume coupling electrophoresis on supercritical water-etched fused silica capillary with two segments of different internal diameters and inner surface roughnesses. Anal Bioanal Chem 2017; 410:167-175. [DOI: 10.1007/s00216-017-0706-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 12/21/2022]
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21
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Beyki MH, Ganjbakhsh SE, Minaeian S, Shemirani F. Clean approach to synthesis of graphene like CuFe2O4@polysaccharide resin nanohybrid: Bifunctional compound for dye adsorption and bacterial capturing. Carbohydr Polym 2017; 174:128-136. [DOI: 10.1016/j.carbpol.2017.06.056] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 06/01/2017] [Accepted: 06/15/2017] [Indexed: 10/19/2022]
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22
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Horká M, Šlais K, Šalplachta J, Růžička F. Preparative isoelectric focusing of microorganisms in cellulose-based separation medium and subsequent analysis by CIEF and MALDI-TOF MS. Anal Chim Acta 2017; 990:185-193. [DOI: 10.1016/j.aca.2017.08.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/28/2017] [Accepted: 08/29/2017] [Indexed: 02/01/2023]
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23
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Glucose reinforced Fe3O4@cellulose mediated amino acid: Reusable magnetic glyconanoparticles with enhanced bacteria capture efficiency. Carbohydr Polym 2017; 170:190-197. [DOI: 10.1016/j.carbpol.2017.04.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 12/27/2022]
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24
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Šalplachta J, Horká M, Šlais K. Preparative isoelectric focusing in a cellulose-based separation medium. J Sep Sci 2017; 40:2498-2505. [PMID: 28432777 DOI: 10.1002/jssc.201700036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 04/04/2017] [Accepted: 04/10/2017] [Indexed: 01/04/2023]
Abstract
An improved preparative method based on isoelectric focusing of analytes in a cellulose-based separation medium is described in this study. Cellulose is suspended in an aqueous solution of simple buffers, ethylene glycol, glycerol, nonionic surfactant, and colored pI markers. Water partially evaporates during focusing run and the separation takes place in an in situ generated layer of cellulose, which has a gel-like appearance at the end of analysis. Final positions of analytes are indicated by the positions of zones of focused pI markers. Fractions, segments of the separation medium with analytes, can be simply collected by spatula and analyzed by downstream analytical methods. Good focusing ability of the new method and almost quantitative recovery of model proteins, cytochrome c and bovine serum albumin, was verified by gel electrophoresis and capillary isoelectric focusing of the collected fractions.
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Affiliation(s)
- Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
| | - Marie Horká
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
| | - Karel Šlais
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
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25
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Horká M, Karásek P, Roth M, Šlais K. Fused silica capillaries with two segments of different internal diameters and inner surface roughnesses prepared by etching with supercritical water and used for volume coupling electrophoresis. Electrophoresis 2017; 38:1260-1267. [DOI: 10.1002/elps.201600499] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/25/2017] [Accepted: 02/17/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the CAS, v. v. i.; Brno Czech Republic
| | - Pavel Karásek
- Institute of Analytical Chemistry of the CAS, v. v. i.; Brno Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the CAS, v. v. i.; Brno Czech Republic
| | - Karel Šlais
- Institute of Analytical Chemistry of the CAS, v. v. i.; Brno Czech Republic
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26
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Capillary Isoelectric Focusing—Useful Tool for Detection and Quantification of Lactic Acid Bacteria in Milk. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0522-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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ARAKAKI A, TAKAHASHI M, HOSOKAWA M, MATSUNAGA T, TANAKA T. Bacterial Inactivation by Applying an Alternating Electromagnetic Field Using PAMAM Dendron-modified Magnetic Nanoparticles. ELECTROCHEMISTRY 2016. [DOI: 10.5796/electrochemistry.84.324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Atsushi ARAKAKI
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology
| | - Mami TAKAHASHI
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology
| | - Masahito HOSOKAWA
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology
| | - Tadashi MATSUNAGA
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology
| | - Tsuyoshi TANAKA
- Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology
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28
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Efficient bacteria capture and inactivation by cetyltrimethylammonium bromide modified magnetic nanoparticles. Colloids Surf B Biointerfaces 2015; 136:659-65. [PMID: 26496472 DOI: 10.1016/j.colsurfb.2015.10.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 09/11/2015] [Accepted: 10/06/2015] [Indexed: 12/21/2022]
Abstract
Functionalized magnetic nanoparticles have shown great application potentials in water treatment processes especially for bacterial removal. Antibacterial agent, cetyltrimethylammonium bromide (CTAB), was employed to modify Fe3O4 nanoparticles to fabricate bactericidal paramagnetic nanoparticles (Fe3O4@CTAB). The as-prepared Fe3O4@CTAB could effectively capture both Gram-negative Escherichia coli and Gram-positive Bacillus subtilis from water. For both cell types, more than 99% of bacteria with initial concentration of 1.5 × 10(7)CFU/mL could be inactivated by Fe3O4@CTAB (0.5 g/L) within 60 min. Fe3O4@CTAB could remove more than 99% of cells over a wide pH (from 3 to 10) and solution ionic strength range (from 0 to 1000 mM). The copresence of sulfate and nitrate did not affect the bacterial capture efficiencies, whereas, phosphate and silicate slightly decreased the bacterial removal rates. However, more than 91% and 81% of cells could be captured at 10mM of phosphate and silicate, respectively. Over 80% of cells could be removed even in the presence of 10mg/L of humic acid. Moreover, Fe3O4@CTAB exhibited good reusability, and greater than 83% of cells could be captured even in the fifth regeneration cycle. Fe3O4@CTAB prepared in this study have great application potentials for water disinfection.
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29
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Šalplachta J, Kubesová A, Horký J, Matoušková H, Tesařová M, Horká M. Characterization of Dickeya and Pectobacterium species by capillary electrophoretic techniques and MALDI-TOF MS. Anal Bioanal Chem 2015; 407:7625-35. [PMID: 26229029 DOI: 10.1007/s00216-015-8920-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 07/10/2015] [Accepted: 07/15/2015] [Indexed: 11/27/2022]
Abstract
Dickeya and Pectobacterium species represent an important group of broad-host-range phytopathogens responsible for blackleg and soft rot diseases on numerous plants including many economically important plants. Although these species are commonly detected using cultural, serological, and molecular methods, these methods are sometimes insufficient to classify the bacteria correctly. On that account, this study was undertaken to investigate the feasibility of three individual analytical techniques, capillary zone electrophoresis (CZE), capillary isoelectric focusing (CIEF), and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), for reliable classification of Dickeya and Pectobacterium species. Forty-three strains, representing different Dickeya and Pectobacterium species, namely Dickeya dianthicola, Dickeya dadantii, Dickeya dieffenbachiae, Dickeya chrysanthemi, Dickeya zeae, Dickeya paradisiaca, Dickeya solani, Pectobacterium carotovorum, and Pectobacterium atrosepticum, were selected for this purpose. Furthermore, the selected bacteria included one strain which could not be classified using traditional microbiological methods. Characterization of the bacteria was based on different pI values (CIEF), migration velocities (CZE), or specific mass fingerprints (MALDI-TOF MS) of intact cells. All the examined strains, including the undetermined bacterium, were characterized and classified correctly into respective species. MALDI-TOF MS provided the most reliable results in this respect.
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Affiliation(s)
- Jiří Šalplachta
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00, Brno, Czech Republic.
| | - Anna Kubesová
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00, Brno, Czech Republic
| | - Jaroslav Horký
- Division of Diagnostics, Central Institute for Supervising and Testing in Agriculture, Šlechtitelů 23, 77900, Olomouc, Czech Republic
| | - Hana Matoušková
- Division of Diagnostics, Central Institute for Supervising and Testing in Agriculture, Šlechtitelů 23, 77900, Olomouc, Czech Republic
| | - Marie Tesařová
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00, Brno, Czech Republic
| | - Marie Horká
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00, Brno, Czech Republic
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30
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Determination of methicillin-resistant and methicillin-susceptible Staphylococcus aureus bacteria in blood by capillary zone electrophoresis. Anal Chim Acta 2015; 868:67-72. [DOI: 10.1016/j.aca.2015.02.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 01/28/2015] [Accepted: 02/01/2015] [Indexed: 12/13/2022]
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31
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Horká M, Karásek P, Růžička F, Dvořáčková M, Sittová M, Roth M. Separation of methicillin-resistant from methicillin-susceptible Staphylococcus aureus by electrophoretic methods in fused silica capillaries etched with supercritical water. Anal Chem 2014; 86:9701-8. [PMID: 25207657 DOI: 10.1021/ac502254f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Identification and prevention of Staphylococcus aureus-caused infections may benefit from a fast and dependable method to distinguish between the methicillin-resistant (MRSA) and methicillin-susceptible (MSSA) S. aureus strains. The current methods involving polymerase chain reaction and/or other molecular tests are usually laborious and time-consuming. We describe here a fast and low-cost method employing capillary zone electrophoresis (CZE) to distinguish between MRSA and MSSA. The method makes use of a supercritical water-treated fused silica capillary, the inner surface of which has subsequently been modified with (3-glycidyloxypropyl)trimethoxysilane. With optimized proportions of suitable additives to the background electrolyte, a CZE separation of MRSA from MSSA may be completed within 12 min. The cells were baseline-resolved, and resolution was determined to be 3.61. The isoelectric points of MSSA and MRSA were found to be the same for both groups of these strains, pI = 3.4.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the ASCR , v. v. i., Veveří 97, 602 00 Brno, Czech Republic
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32
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CIEF separation, UV detection, and quantification of ampholytic antibiotics and bacteria from different matrices. Anal Bioanal Chem 2014; 406:6285-96. [DOI: 10.1007/s00216-014-8053-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 06/25/2014] [Accepted: 07/18/2014] [Indexed: 01/24/2023]
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33
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Zhan S, Yang Y, Shen Z, Shan J, Li Y, Yang S, Zhu D. Efficient removal of pathogenic bacteria and viruses by multifunctional amine-modified magnetic nanoparticles. JOURNAL OF HAZARDOUS MATERIALS 2014; 274:115-23. [PMID: 24769848 DOI: 10.1016/j.jhazmat.2014.03.067] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/26/2014] [Accepted: 03/31/2014] [Indexed: 05/10/2023]
Abstract
A novel amine-functionalized magnetic Fe3O4-SiO2-NH2 nanoparticle was prepared by layer-by-layer method and used for rapid removal of both pathogenic bacteria and viruses from water. The nanoparticles were characterized by TEM, EDS, XRD, XPS, FT-IR, BET surface analysis, magnetic property tests and zeta-potential measurements, respectively, which demonstrated its well-defined core-shell structures and strong magnetic responsivity. Pathogenic bacteria and viruses are often needed to be removed conveniently because of a lot of co-existing conditions. The amine-modified nanoparticles we prepared were attractive for capturing a wide range of pathogens including not only bacteriophage f2 and virus (Poliovirus-1), but also various bacteria such as S. aureus, E. coli O157:H7, P. aeruginosa, Salmonella, and B. subtilis. Using as-prepared amine-functionalized MNPs as absorbent, the nonspecific removal efficiency of E. coli O157:H7 or virus was more than 97.39%, while it is only 29.8% with Fe3O4-SiO2 particles. From joint removal test of bacteria and virus, there are over 95.03% harmful E. coli O157:H7 that can be removed from mixed solution with polyclonal anti-E. coli O157:H7 antibody modified nanoparticles. Moreover, the synergy effective mechanism has also been suggested.
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Affiliation(s)
- Sihui Zhan
- College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States.
| | - Yang Yang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China
| | - Zhiqiang Shen
- Key Laboratory of Risk Assessment and Control for Environment and Food Safety, Institute of Health and Environmental Medicine, Tianjin 300050, PR China
| | - Junjun Shan
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Yi Li
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States; Department of Chemistry, Tianjin University, Tianjin 300072, PR China
| | - Shanshan Yang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Dandan Zhu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China
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34
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Deng M, Wang Y, Jia L. N-Methylimidazolium modified magnetic particles-assisted highly sensitive Escherichia coli detection based on polymerase chain reaction and capillary electrophoresis. Anal Chim Acta 2014; 827:47-53. [DOI: 10.1016/j.aca.2014.04.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 11/17/2022]
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35
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Jin Y, Liu F, Shan C, Tong M, Hou Y. Efficient bacterial capture with amino acid modified magnetic nanoparticles. WATER RESEARCH 2014; 50:124-34. [PMID: 24370656 DOI: 10.1016/j.watres.2013.11.045] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 11/27/2013] [Accepted: 11/28/2013] [Indexed: 05/22/2023]
Abstract
Traditional chemical disinfectants are becoming increasingly defective due to the generation of carcinogenic disinfection byproducts and the emergence of antibiotic-resistant bacterial strains. Functionalized magnetic nanoparticles yet have shown great application potentials in water treatment processes especially for bacterial removal. In this study, three types of amino acids (arginine, lysine, and poly-l-lysine) functionalized Fe3O4 nanoparticles (Fe3O4@Arg, Fe3O4@Lys, and Fe3O4@PLL) were prepared through a facile and inexpensive two-step process. The amino acid modified Fe3O4 nanoparticles (Fe3O4@AA) showed rapid and efficient capture and removal properties for both Gram-positive Bacillus subtilis (B. subtilis) and Gram-negative Escherichia coli 15597 (E. coli). For both strains, more than 97% of bacteria (initial concentration of 1.5 × 10(7) CFU mL(-1)) could be captured by all three types of magnetic nanoparticles within 20 min. With E. coli as a model strain, Fe3O4@AA could remove more than 94% of cells from solutions over a broad pH range (from 4 to 10). Solution ionic strength did not affect cell capture efficiency. The co-presence of sulfate and nitrate in solutions did not affect the capture efficiency, whereas, the presence of phosphate and silicate slightly decreased the removal rate. However, around 90% and 80% of cells could be captured by Fe3O4@AA even at 10 mM of silicate and phosphate, respectively. Bacterial capture efficiencies were over 90% and 82% even in the present of 10 mg L(-1) of humic acid and alginate, respectively. Moreover, Fe3O4@AA nanoparticles exhibited good reusability, and greater than 90% of E. coli cells could be captured even in the fifth regeneration cycle. The results showed Fe3O4@AA fabricated in this study have great application potential for bacteria removal from water.
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Affiliation(s)
- Yinjia Jin
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Fei Liu
- Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing 100871, PR China
| | - Chao Shan
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Meiping Tong
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China.
| | - Yanglong Hou
- Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing 100871, PR China.
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36
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Vykydalová M, Horká M, Růžička F, Duša F, Moravcová D, Kahle V, Šlais K. Combination of micropreparative solution isoelectric focusing and high-performance liquid chromatography for differentiation of biofilm-positive and biofilm-negative Candida parapsilosis group from vascular catheter. Anal Chim Acta 2014; 812:243-9. [DOI: 10.1016/j.aca.2013.12.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 12/16/2013] [Accepted: 12/25/2013] [Indexed: 10/25/2022]
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37
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Horká M, Šalplachta J, Karásek P, Kubesová A, Horký J, Matoušková H, Šlais K, Roth M. Combination of Capillary Isoelectric Focusing in a Tapered Capillary with MALDI-TOF MS for Rapid and Reliable Identification of Dickeya Species from Plant Samples. Anal Chem 2013; 85:6806-12. [DOI: 10.1021/ac4009176] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
| | - Jiří Šalplachta
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
| | - Pavel Karásek
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
| | - Anna Kubesová
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
| | - Jaroslav Horký
- Division of Diagnostics, State Phytosanitary Administration, Šlechtitelů
23, 779 00 Olomouc, Czech Republic
| | - Hana Matoušková
- Division of Diagnostics, State Phytosanitary Administration, Šlechtitelů
23, 779 00 Olomouc, Czech Republic
| | - Karel Šlais
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří
97, 602 00 Brno, Czech Republic
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38
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Horká M, Karásek P, Salplachta J, Růžička F, Vykydalová M, Kubesová A, Dráb V, Roth M, Slais K. Capillary isoelectric focusing of probiotic bacteria from cow's milk in tapered fused silica capillary with off-line matrix-assisted laser desorption/ionization time-of-flight mass spectrometry identification. Anal Chim Acta 2013; 788:193-9. [PMID: 23845500 DOI: 10.1016/j.aca.2013.05.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/06/2013] [Accepted: 05/18/2013] [Indexed: 11/28/2022]
Abstract
In this study, combination of capillary isoelectric focusing (CIEF) in tapered fused silica (FS) capillary with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is presented as an efficient approach for unambiguous identification of probiotic bacteria in real sample. For this purpose, bacteria within genus Lactobacillus were selected as model bioanalytes and cow's milk was selected as a biological sample. CIEF analysis of both the cultivated bacteria and the bacteria in the milk was optimized and isoelectric points characterizing the examined bacteria were subsequently determined independently of the bacterial sample origin. The use of tapered FS capillary significantly enhanced the separation capacity and efficiency of the CIEF analyses performed. In addition, the cell number injected into the tapered FS capillary was quantified and an excellent linearity of the calibration curves was achieved which enabled quantitative analysis of the bacteria by CIEF with UV detection. The minimum detectable number of bacterial cells was 2×10(6) mL(-1). Finally, cow's milk spiked with the selected bacterium was analyzed by CIEF in tapered FS capillary, the focused and detected bacterial cells were collected from the capillary, deposited onto the cultivation medium, and identified using MALDI-TOF MS afterward. Our results have revealed that the proposed procedure can be advantageously used for unambiguous identification of probiotic bacteria in a real sample.
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Affiliation(s)
- Marie Horká
- Institute of Analytical Chemistry of the ASCR, vvi, Brno, Czech Republic.
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39
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Šlais K, Horká M, Karásek P, Planeta J, Roth M. Isoelectric Focusing in Continuously Tapered Fused Silica Capillary Prepared by Etching with Supercritical Water. Anal Chem 2013; 85:4296-300. [DOI: 10.1021/ac400295m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karel Šlais
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00 Brno,
Czech Republic
| | - Marie Horká
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00 Brno,
Czech Republic
| | - Pavel Karásek
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00 Brno,
Czech Republic
| | - Josef Planeta
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00 Brno,
Czech Republic
| | - Michal Roth
- Institute of Analytical Chemistry of the ASCR, v. v. i., Veveří 97, 602 00 Brno,
Czech Republic
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40
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Use of electrophoretic techniques and MALDI–TOF MS for rapid and reliable characterization of bacteria: analysis of intact cells, cell lysates, and “washed pellets”. Anal Bioanal Chem 2013; 405:3165-75. [DOI: 10.1007/s00216-013-6754-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 12/18/2012] [Accepted: 01/16/2013] [Indexed: 11/29/2022]
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41
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Bahnasy MF, Lucy CA. A versatile semi-permanent sequential bilayer/diblock polymer coating for capillary isoelectric focusing. J Chromatogr A 2012; 1267:89-95. [DOI: 10.1016/j.chroma.2012.07.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 07/03/2012] [Accepted: 07/06/2012] [Indexed: 12/30/2022]
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42
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Šalplachta J, Kubesová A, Horká M. Latest improvements in CIEF: From proteins to microorganisms. Proteomics 2012; 12:2927-36. [DOI: 10.1002/pmic.201200136] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 05/18/2012] [Accepted: 06/06/2012] [Indexed: 12/25/2022]
Affiliation(s)
- Jiří Šalplachta
- Institute of Analytical Chemistry of the ASCR; Brno; Czech Republic
| | - Anna Kubesová
- Institute of Analytical Chemistry of the ASCR; Brno; Czech Republic
| | - Marie Horká
- Institute of Analytical Chemistry of the ASCR; Brno; Czech Republic
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43
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Horká M, Růžička F, Kubesová A, Šlais K. Dynamic labeling of diagnostically significant microbial cells in cerebrospinal fluid by red chromophoric non-ionogenic surfactant for capillary electrophoresis separations. Anal Chim Acta 2012; 728:86-92. [DOI: 10.1016/j.aca.2012.03.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 03/21/2012] [Accepted: 03/26/2012] [Indexed: 02/08/2023]
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Horká M, Kubesová A, Šalplachta J, Zapletalová E, Horký J, Šlais K. Capillary and gel electromigration techniques and MALDI-TOF MS – Suitable tools for identification of filamentous fungi. Anal Chim Acta 2012; 716:155-62. [DOI: 10.1016/j.aca.2011.12.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 12/14/2011] [Accepted: 12/15/2011] [Indexed: 10/14/2022]
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Szumski M, Kłodzińska E, Dziubakiewicz E, Hrynkiewicz K, Buszewski B. EFFECT OF APPLIED VOLTAGE ON VIABILITY OF BACTERIA DURING SEPARATION UNDER ELECTROPHORETIC CONDITIONS. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.593223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Michał Szumski
- a Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry , Nicolaus Copernicus University , Torun , Poland
| | - Ewa Kłodzińska
- a Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry , Nicolaus Copernicus University , Torun , Poland
| | - Ewelina Dziubakiewicz
- a Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry , Nicolaus Copernicus University , Torun , Poland
| | - Katarzyna Hrynkiewicz
- b Department of Microbiology , Institute of General and Molecular Biology, Nicolaus Copernicus University , Torun , Poland
| | - Bogusław Buszewski
- a Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry , Nicolaus Copernicus University , Torun , Poland
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Subirats X, Blaas D, Kenndler E. Recent developments in capillary and chip electrophoresis of bioparticles: Viruses, organelles, and cells. Electrophoresis 2011; 32:1579-90. [PMID: 21647924 DOI: 10.1002/elps.201100048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 02/18/2011] [Accepted: 02/20/2011] [Indexed: 11/09/2022]
Abstract
In appropriate aqueous buffer solutions, biological particles usually exhibit a particular electric surface charge due to exposed charged or chargeable functional groups (amino acid residues, acidic carbohydrate moieties, etc.). Consequently, these bioparticles can migrate in solution under the influence of an electric field allowing separation according to their electrophoretic mobilities or their pI values. Based on these properties, electromigration methods are of eminent interest for the characterization, separation, and detection of such particles. The present review discusses the research papers published between 2008 and 2010 dealing with isoelectric focusing and zone electrophoresis of viruses, organelles and microorganisms (bacteria and yeast cells) in the capillary and the chip format.
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Affiliation(s)
- Xavier Subirats
- Max F. Perutz Laboratories, Medical University of Vienna, Vienna Biocenter (VBC), Vienna, Austria.
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Ramsay LM, Cermak N, Dada OO, Dovichi NJ. Capillary isoelectric focusing with pH 9.7 cathode for the analysis of gastric biopsies. Anal Bioanal Chem 2011; 400:2025-30. [PMID: 21461616 PMCID: PMC4429874 DOI: 10.1007/s00216-011-4926-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 03/11/2011] [Accepted: 03/16/2011] [Indexed: 10/18/2022]
Abstract
Capillary isoelectric focusing tends to suffer from poor reproducibility, particularly for the analysis of complex protein samples from cellular or tissue homogenates. This poor reproducibility appears to be associated with erratic variations in electroosmotic flow. One cause of electroosmotic flow variation is degradation of the capillary coating caused by the extremely basic solution commonly used during mobilization and focusing; this degradation of the capillary coating can be reduced by employing a CAPS mobilization buffer at pH 9. Another cause of variation is protein adsorption to the capillary wall, which causes an increase in electroosmotic flow. The effects of protein adsorption can be reduced by use of surfactants in the buffer and by employing an extremely low sample loading. We report the use of CAPS mobilization buffer in combination with an ultrasensitive laser-induced fluorescence detector for the reproducible analysis of ∼2 ng of protein from a Barrett's esophagus biopsy.
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Affiliation(s)
- Lauren M. Ramsay
- Department of Chemistry, University of Washington, Seattle WA 98195 USA
| | - Nathan Cermak
- Program in Computational and Systems Biology, Massachusetts Institute of Technology, Cambridge MA 02139 USA
| | - Oluwatosin O. Dada
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame IN 46617, USA
| | - Norman J. Dovichi
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame IN 46617, USA
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Horká M, Růžička F, Kubesová A, Němcová E, Šlais K. Separation of phenotypically indistinguishable Candida species, C. orthopsilosis, C. metapsilosis and C. parapsilosis, by capillary electromigration techniques. J Chromatogr A 2011; 1218:3900-7. [DOI: 10.1016/j.chroma.2011.04.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 04/19/2011] [Accepted: 04/20/2011] [Indexed: 12/19/2022]
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The trace analysis of microorganisms in real samples by combination of a filtration microcartridge and capillary isoelectric focusing. Anal Bioanal Chem 2011; 400:3133-40. [DOI: 10.1007/s00216-011-4975-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 03/29/2011] [Accepted: 03/30/2011] [Indexed: 10/18/2022]
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