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Maciejewska M. Influence of the Polymerization Parameters on the Porosity and Thermal Stability of Polymeric Monoliths. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2860. [PMID: 38930229 PMCID: PMC11204994 DOI: 10.3390/ma17122860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/29/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024]
Abstract
Rigid porous polymeric monoliths are robust, highly efficient, versatile stationary phases. They offer simple preparation and convenient modification provided by a whole range of synthesis factors, e.g., starting monomers, cross-linkers, initiators, porogens, polymerization techniques, and temperature. The main aim of this study was to synthesize polymeric monoliths and determine the correlation between polymerization parameters and the porosity and thermal stability of the obtained materials. Polymeric monoliths were synthesized directly in HPLC columns using N-vinyl-2-pyrrolidone (NVP) and 4-vinylpiridine (4VP) as functional monomers, with trimethylolpropane trimethacrylate (TRIM) serving as the cross-linking monomer. During copolymerization a mixture of cyclohexanol/decane-1-ol was used as the pore-forming diluent. Polymerization was carried out at two different temperatures: 55 and 75 °C. As a result, monoliths with highly developed internal structure were synthesized. The value of their specific surface area was in the range of 92 m2/g to 598 m2/g, depending on the monomer composition and polymerization temperature. Thermal properties of the obtained materials were investigated by means of thermogravimetry (TG). Significant differences in thermal behavior were noticed between monoliths synthesized at 55 and 75 °C. Additionally, the poly(NVP-co-TRIM) monolith was successfully applied in GC analyses.
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Affiliation(s)
- Małgorzata Maciejewska
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Gliniana 33, 20-614 Lublin, Poland
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2
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Liang Y, Zhang L, Zhang Y. Chromatographic separation of peptides and proteins for characterization of proteomes. Chem Commun (Camb) 2023; 59:270-281. [PMID: 36504223 DOI: 10.1039/d2cc05568f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Characterization of proteomes aims to comprehensively characterize proteins in cells or tissues via two main strategies: (1) bottom-up strategy based on the separation and identification of enzymatic peptides; (2) top-down strategy based on the separation and identification of intact proteins. However, it is challenged by the high complexity of proteomes. Consequently, the improvements in peptide and protein separation technologies for simplifying the sample should be critical. In this feature article, separation columns for peptide and protein separation were introduced, and peptide separation technologies for bottom-up proteomic analysis as well as protein separation technologies for top-down proteomic analysis were summarized. The achievement, recent development, limitation and future trends are discussed. Besides, the outlook on challenges and future directions of chromatographic separation in the field of proteomics was also presented.
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Affiliation(s)
- Yu Liang
- CAS Key Lab of Separation Sciences for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | - Lihua Zhang
- CAS Key Lab of Separation Sciences for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | - Yukui Zhang
- CAS Key Lab of Separation Sciences for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
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3
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Chromatographic supports for enantioselective liquid chromatography: Evolution and innovative trends. J Chromatogr A 2022; 1684:463555. [DOI: 10.1016/j.chroma.2022.463555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 09/29/2022] [Accepted: 10/06/2022] [Indexed: 11/21/2022]
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4
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Jaag S, Wen C, Peters B, Lämmerhofer M. Kinetic performance comparison of superficially porous, fully porous and monolithic reversed-phase columns by gradient kinetic plots for the separation of protein biopharmaceuticals. J Chromatogr A 2022; 1676:463251. [PMID: 35752149 DOI: 10.1016/j.chroma.2022.463251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/31/2022] [Accepted: 06/13/2022] [Indexed: 11/25/2022]
Abstract
To find the best performing column for the analysis of protein-based biopharmaceuticals is a significant challenge as meanwhile numerous modern columns with distinct stationary phase morphologies are available for reversed-phase liquid chromatography. Especially when besides morphology also several other column factors are different, it is hard to decide about the best performing column a priori. To cope with this problem, in the present work 13 different reversed-phase columns dedicated for protein separations were systematically tested by the gradient kinetic plot method. A comprehensive comparison of columns with different morphologies (monolithic, fully porous and superficially porous particle columns), particle sizes and pore diameters as well as column length was performed. Specific consideration was also given to various monolithic columns which recently shifted a bit out of the prime focus in the scientific literature. The test proteins ranged from small proteins starting from 12 kDa, to medium sized proteins (antibody subunits obtained after IdeS-digestion and disulphide reduction) and an intact antibody. The small proteins cytochrome c, lysozyme and β-lactoglobulin could be analysed with similar performance by the best columns of all three column morphologies while for the antibody fragments specific fully porous and superficially porous particle columns were superior. A 450 Å 3,5 µm superficially porous particle column showed the best performance for the intact antibody while a 1.7 µm fully porous particle column with 300 Å showed equivalent performance to the best superficially porous column with thin shell and 400 Å pore size for proteins between 12 and 25 kDa. While the majority of the columns had C4 bonding chemistry, the silica monolith with C18 bonding and 300 Å mesopore size approximated the best performing particle columns and outperformed a C4 300 Å wide-pore monolith. The current work can support the preferred choice for the most suitable reversed-phase column for protein separations.
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Affiliation(s)
- Simon Jaag
- Pharmaceutical (Bio-)Analysis, Institute of Pharmaceutical Sciences, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Chunmei Wen
- Pharmaceutical (Bio-)Analysis, Institute of Pharmaceutical Sciences, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Benjamin Peters
- Instrumental Analytics R&D, Merck KGaA, Frankfurter Str. 250, 64293 Darmstadt, Germany
| | - Michael Lämmerhofer
- Pharmaceutical (Bio-)Analysis, Institute of Pharmaceutical Sciences, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.
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5
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Vergara-Barberán M, Lerma-García MJ, Simó-Alfonso EF, García-Hernández M, Martín ME, García-Sacristán A, González VM, Herrero-Martínez JM. Selection and characterization of DNA aptamers for highly selective recognition of the major allergen of olive pollen Ole e 1. Anal Chim Acta 2022; 1192:339334. [PMID: 35057930 DOI: 10.1016/j.aca.2021.339334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 02/05/2023]
Abstract
In this study, single-stranded DNA aptamers with binding affinity to Ole e 1, the major allergen of olive pollen, were selected using systematic evolution of ligands by exponential enrichment (SELEX) method. Binding of the aptamers was firstly established by enzyme-linked oligonucleotide assay (ELONA) and aptaprecipitation assays. Additionally, aptamer-modified monolithic capillary chromatography was used in order to evaluate the recognition of this allergenic protein against other non-target proteins. The results indicated that AptOle1#6 was the aptamer that provided the highest affinity for Ole e 1. The selected aptamer showed good selective recognition of this protein, being not able to retain other non-target proteins (HSA, cyt c, and other pollen protein such as Ole e 9). The feasibility of the affinity monolithic column was demonstrated by selective recognition of Ole e 1 in an allergy skin test. The stability and reproducibility of this monolithic column was suitable, with relative standard deviations (RSDs) in retention times and peak area values of 7.8 and 9.3%, respectively (column-to-column reproducibility). This is the first study that describes the design of an efficient DNA aptamer for this relevant allergen.
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Affiliation(s)
- María Vergara-Barberán
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100, Burjassot, Valencia, Spain
| | - María Jesús Lerma-García
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100, Burjassot, Valencia, Spain
| | - Ernesto F Simó-Alfonso
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100, Burjassot, Valencia, Spain
| | - Marta García-Hernández
- Grupo de Aptámeros. Departamento de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal (IRYCIS), Carretera de Colmenar Viejo Km.9.100, CP-28034, Madrid, Spain
| | - M Elena Martín
- Grupo de Aptámeros. Departamento de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal (IRYCIS), Carretera de Colmenar Viejo Km.9.100, CP-28034, Madrid, Spain
| | | | - Víctor M González
- Grupo de Aptámeros. Departamento de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal (IRYCIS), Carretera de Colmenar Viejo Km.9.100, CP-28034, Madrid, Spain; Aptus Biotech SL, Av. Cardenal Herrera Oria 298, CP-28035, Madrid, Spain
| | - José Manuel Herrero-Martínez
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100, Burjassot, Valencia, Spain.
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6
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Liang Y, Zhang L, Zhang Y. Monolithic Materials-Based RPLC-MS for Proteoform Separation and Identification. Methods Mol Biol 2022; 2500:43-53. [PMID: 35657586 DOI: 10.1007/978-1-0716-2325-1_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
High-performance separation of proteoforms plays an important role in top-down proteomic ananlysis due to high complexity of the proteome. To this end, the functionalized ethylene-bridged hybrid monolithic materials have been developed for reversed-phase liquid chromatographic separation of proteoforms followed by online combination with high-resolution mass spectrometry (MS) for top-down proteomic analysis. Such monoliths have advantages of homogenously distributed functional groups in the framework, good chemical stability, and high permeability and, thus, show high resolution, good reproducibility, and low backpressure for proteoform separation. This chapter describes in detail the preparation of such monoliths and online combination with high-resolution MS for proteoform separation and identification.
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Affiliation(s)
- Yu Liang
- CAS Key Lab of Separation Sciences for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Lihua Zhang
- CAS Key Lab of Separation Sciences for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
| | - Yukui Zhang
- CAS Key Lab of Separation Sciences for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
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7
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Balakrishnan HK, Doeven EH, Merenda A, Dumée LF, Guijt RM. 3D printing for the integration of porous materials into miniaturised fluidic devices: A review. Anal Chim Acta 2021; 1185:338796. [PMID: 34711329 DOI: 10.1016/j.aca.2021.338796] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 01/25/2023]
Abstract
Porous materials facilitate the efficient separation of chemicals and particulate matter by providing selectivity through structural and surface properties and are attractive as sorbent owing to their large surface area. This broad applicability of porous materials makes the integration of porous materials and microfluidic devices important in the development of more efficient, advanced separation platforms. Additive manufacturing approaches are fundamentally different to traditional manufacturing methods, providing unique opportunities in the fabrication of fluidic devices. The complementary 3D printing (3DP) methods are each accompanied by unique opportunities and limitations in terms of minimum channel size, scalability, functional integration and automation. This review focuses on the developments in the fabrication of 3DP miniaturised fluidic devices with integrated porous materials, focusing polymer-based methods including fused filament fabrication (FFF), inkjet 3D printing and digital light projection (DLP). The 3DP methods are compared based on resolution, scope for multimaterial printing and scalability for manufacturing. As opportunities for printing pores are limited by resolution, the focus is on approaches to incorporate materials with sub-micron pores to be used as membrane, sorbent or stationary phase in separation science using Post-Print, Print-Pause-Print and In-Print processes. Technical aspects analysing the efficiency of the fabrication process towards scalable manufacturing are combined with application aspects evaluating the separation and/or extraction performance. The review is concluded with an overview on achievements and opportunities for manufacturable 3D printed membrane/sorbent integrated fluidic devices.
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Affiliation(s)
- Hari Kalathil Balakrishnan
- Deakin University, Centre for Rural and Regional Futures, Locked Bag 20000, Geelong, VIC 3320, Australia; Deakin University, Institute for Frontier Materials, Locked Bag 20000, Geelong, VIC 3320, Australia
| | - Egan H Doeven
- Deakin University, Centre for Rural and Regional Futures, Locked Bag 20000, Geelong, VIC 3320, Australia
| | - Andrea Merenda
- Deakin University, Institute for Frontier Materials, Locked Bag 20000, Geelong, VIC 3320, Australia
| | - Ludovic F Dumée
- Khalifa University, Department of Chemical Engineering, Abu Dhabi, United Arab Emirates; Research and Innovation Centre on CO(2) and Hydrogen, Khalifa University, Abu Dhabi, United Arab Emirates; Centre for Membrane and Advanced Water Technology, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Rosanne M Guijt
- Deakin University, Centre for Rural and Regional Futures, Locked Bag 20000, Geelong, VIC 3320, Australia.
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8
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Zhao T, Ding X, Chen Y, Lin C, Qi G, Lin X, Xie Z. Towards highly specific aptamer-affinity monolithic column by efficient UV light-initiated polymerization in "one-pot". Anal Chim Acta 2021; 1165:338517. [PMID: 33975695 DOI: 10.1016/j.aca.2021.338517] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 04/03/2021] [Accepted: 04/12/2021] [Indexed: 01/08/2023]
Abstract
Time-consuming or tedious operation in multiple-step process might is the obstacle for efficiently preparing aptamer-affinity monolithic column. Here, a new and facile strategy to prepare aptamer-based hybrid affinity monolith in "one-pot" at room temperature was exploited, in which UV light-initiated free-radical polymerization and "thiol-ene" click reaction were implemented simultaneously. Only 7 min was cost for finishing the polymerization reaction, which was only 1/100 of that for the traditional thermal polymerization. Using ochratoxin A (OTA) as the model analyte, the recipe for photo-initiated polymerization was optimized, and SEM morphology, FTIR, EDS, pore size distribution and specific recognition performance were also studied. Compared with traditional thermal polymerization, the resultant monolith was achieved more facilely and displayed better results such as more homogeneous skeleton structure, higher reaction efficiency of aptamer (>88.2%) and better specific selectivity to OTA. Besides, an extremely low nonspecific adsorption of analogues was obtained and showed a level at only 1/25 of that in the similar aptamer-affinity monolith prepared by thermal polymerization. Applied to beer and red wine samples, good recovery yields about 99.7 ± 4.0% -101.2 ± 2.3% (n = 3)was achieved with the acceptable RSDs. It would open up a rapid and promising access to efficiently preparing high-performance aptamer-based affinity monolithic columns for online specific recognition.
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Affiliation(s)
- Tingting Zhao
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Xinyue Ding
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Yiqiong Chen
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Chenchen Lin
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Guomin Qi
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China
| | - Xucong Lin
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China; Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety, Fujian, Fuzhou, 350108, People's Republic of China.
| | - Zenghong Xie
- Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, 350108, People's Republic of China; Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety, Fujian, Fuzhou, 350108, People's Republic of China
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9
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Broeckhoven K, Desmet G. Advances and Innovations in Liquid Chromatography Stationary Phase Supports. Anal Chem 2020; 93:257-272. [DOI: 10.1021/acs.analchem.0c04466] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- K. Broeckhoven
- Vrije Universiteit Brussel, Department of Chemical Engineering (CHIS), Faculty of Engineering, Pleinlaan 2, 1050 Brussels, Belgium
| | - G. Desmet
- Vrije Universiteit Brussel, Department of Chemical Engineering (CHIS), Faculty of Engineering, Pleinlaan 2, 1050 Brussels, Belgium
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10
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Komendová M, Svobodová P, Urban J. Photografting of polymer monoliths by a crosslinking monomer. J Chromatogr A 2020; 1631:461558. [DOI: 10.1016/j.chroma.2020.461558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/25/2020] [Accepted: 09/16/2020] [Indexed: 01/23/2023]
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11
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Greguš M, Kostas JC, Ray S, Abbatiello SE, Ivanov AR. Improved Sensitivity of Ultralow Flow LC-MS-Based Proteomic Profiling of Limited Samples Using Monolithic Capillary Columns and FAIMS Technology. Anal Chem 2020; 92:14702-14712. [PMID: 33054160 DOI: 10.1021/acs.analchem.0c03262] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In this work, we pioneered a combination of ultralow flow (ULF) high-efficiency ultranarrow bore monolithic LC columns coupled to MS via a high-field asymmetric waveform ion mobility spectrometry (FAIMS) interface to evaluate the potential applicability for high sensitivity, robust, and reproducible proteomic profiling of low nanogram-level complex biological samples. As a result, ULF LC-FAIMS-MS brought unprecedented sensitivity levels and high reproducibility in bottom-up proteomic profiling. In addition, FAIMS improved the dynamic range, signal-to-noise ratios, and detection limits in ULF LC-MS-based measurements by significantly reducing chemical noise in comparison to the conventional nanoESI interface used with the same ULF LC-MS setup. Two, three, or four compensation voltages separated by at least 15 V were tested within a single LC-MS run using the FAIMS interface. The optimized ULF LC-ESI-FAIMS-MS/MS conditions resulted in identification of 2,348 ± 42 protein groups, 10,062 ± 285 peptide groups, and 15,734 ± 350 peptide-spectrum matches for 1 ng of a HeLa digest, using a 1 h gradient at the flow rate of 12 nL/min, which represents an increase by 38%, 91%, and 131% in respective identifications, as compared to the control experiment (without FAIMS). To evaluate the practical utility of the ULF LC-ESI-FAIMS-MS platform in proteomic profiling of limited samples, approximately 100, 1,000, and 10,000 U937 myeloid leukemia cells were processed, and a one-tenth of each sample was analyzed. Using the optimized conditions, we were able to reliably identify 251 ± 54, 1,135 ± 80, and 2,234 ± 25 protein groups from injected aliquots corresponding to ∼10, 100, and 1,000 processed cells.
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Affiliation(s)
- Michal Greguš
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, United States
| | - James C Kostas
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, United States
| | - Somak Ray
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, United States
| | - Susan E Abbatiello
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, United States
| | - Alexander R Ivanov
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, United States
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Warias R, Ragno D, Massi A, Belder D. A Visible-Light-Powered Polymerization Method for the Immobilization of Enantioselective Organocatalysts into Microreactors. Chemistry 2020; 26:13152-13156. [PMID: 32453458 PMCID: PMC7693110 DOI: 10.1002/chem.202002063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Indexed: 11/21/2022]
Abstract
A versatile one‐step photopolymerization approach for the immobilization of enantioselective organocatalysts is presented. Chiral organocatalyst‐containing monoliths based on polystyrene divinylbenzene copolymer were generated inside channels of microfluidic chips. Exemplary performance tests were performed for the monolithic Hayashi–Jørgensen catalyst in continuous flow, which showed good results for the Michael addition of aldehydes to nitroalkenes in terms of stereoselectivity and catalyst stability with minimal consumption of reagents and solvents.
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Affiliation(s)
- Rico Warias
- Institute of Analytical Chemistry, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany
| | - Daniele Ragno
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Alessandro Massi
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Detlev Belder
- Institute of Analytical Chemistry, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany
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13
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Dores-Sousa JL, Terryn H, Eeltink S. Morphology optimization and assessment of the performance limits of high-porosity nanostructured polymer monolithic capillary columns for proteomics analysis. Anal Chim Acta 2020; 1124:176-183. [DOI: 10.1016/j.aca.2020.05.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/05/2020] [Accepted: 05/08/2020] [Indexed: 11/28/2022]
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14
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Urban J. Are we approaching a post‐monolithic era? J Sep Sci 2020; 43:1628-1633. [DOI: 10.1002/jssc.201901331] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 01/17/2020] [Accepted: 01/22/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Jiří Urban
- Department of ChemistryFaculty of ScienceMasaryk University Brno Czech Republic
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15
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Mejía-Carmona K, Soares da Silva Burato J, Borsatto JVB, de Toffoli AL, Lanças FM. Miniaturization of liquid chromatography coupled to mass spectrometry. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115735] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Liu S, Fu X, Löffler R, Lämmerhofer M. In-situ photopolymerized polyhedral oligomeric silsesquioxane-derived monolithic capillary columns with quinidine functionality for enantioseparation by nano-liquid chromatography. Electrophoresis 2019; 40:3132-3139. [PMID: 31591731 DOI: 10.1002/elps.201900316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/03/2019] [Accepted: 10/04/2019] [Indexed: 01/07/2023]
Abstract
The successful fabrication of monolithic capillary columns for enantiomer separations was achieved within vinylized fused silica capillaries via fast "one-pot" photo-initiated free radical polymerization reaction. A mixture consisting of polyhedral oligomeric silsesquioxane, O-[2-(methacryloyloxy)ethylcarbamoyl]-10,11-dihydroquinidine was copolymerized in the presence of n-butanol, ethylene glycol and photo-initiator 2,2-dimethoxy-2-phenylacetophenone. The morphology of the resultant polymeric hybrid inorganic-organic material and its permeability as well as porosity can be controlled by adjusting the composition of the monomers and binary porogenic solvent. The chromatographic characteristics of the columns have been investigated. Separation factors of N-acetyl-phenylalanine (Ac-Phe) and dichlorprop dropped with decrease of chiral functional monomer. Permeability was better when the macroporogen ethyleneglycol was present at higher concentrations during the polymerization. In general, the chiral compounds were well separated (dichlorprop: α = 1.53, Rs up to 4.14; Ac-Phe: α = 1.36, Rs up to 2.69) by nano-HPLC with an optimized enantioselective monolithic capillary column which can be prepared within a few minutes.
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Affiliation(s)
- Siyao Liu
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Tübingen, Germany
| | - Xinyue Fu
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Tübingen, Germany
| | - Ronny Löffler
- Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tübingen, Tübingen, Germany
| | - Michael Lämmerhofer
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Tübingen, Germany
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17
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Use of thiol functionalities for the preparation of porous monolithic structures and modulation of their surface chemistry: A review. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.06.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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18
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Alzahrani E. Organic Boronate Affinity Sorbent for Capture of cis-Diol Containing Compounds
Eman Alzahrani. ACTA ACUST UNITED AC 2019. [DOI: 10.14233/ajchem.2019.22108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Boronate affinity chromatography (BAC) is argued to be a critical tool in specific capture and separation of cis-diol containing compounds. In present study, organic boronate affinity monolith poly(3-acrylamido phenylboronic acid-co-ethylene dimethacrylate) (AAPBA-co-EDMA) is prepared through one-step in situ polymerization procedure within a micropipette through the application of a pre-polymerization mixture which contains functional monomer (3-acrylamido phenylboronic acid), cross-linker (ethylene dimethacrylate), porogenic solvent (methanol with poly ethylene glycol) and initiator (2,2-dimethoxy-2-phenyl-acetophenone). Following the optimization of time exposure to UV lamp with 365 nm, the macroporous organic boronate monolith was selected. Several approaches including SEM and BET analysis, FT-IR spectroscopy and measuring contact angle were applied in the characterization of the morphology of the monolith. Several cis-diol compounds that include catechol and galactose are applied in the assessment of the boronate affinity of the organic monolithic material. Additionally, the capture of glucose from urine sample is also conducted. The basic principle of the
approach is that boronic acid forms covalent bond with cis-diols in basic solutions whereas the ester bonds are dissociated under acidic media. By using the study results, monolith demonstrate good selectivity towards cis-diol containing compounds. Due to the hydrophilic property of monolith, the affinity chromatography monolith can be performed for several cis-diol compounds including glycoproteins and nucleosides. Also, fabrication of the organic boronate monolithic in microfluidic equipment is essential in facilitating the extraction of boronate affinity using small-volume samples.
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Affiliation(s)
- Eman Alzahrani
- Department of Chemistry, Faculty of Science, Taif University, Taif, Kingdom of Saudi Arabia
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Abstract
Nano liquid chromatography (nanoLC), with columns having an inner diameter (ID) of ≤100 μm, can provide enhanced sensitivity and enable analysis of limited samples.
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Affiliation(s)
- Steven Ray Wilson
- Department of Chemistry
- University of Oslo
- Oslo
- Norway
- Hybrid Technology Hub-Centre of Excellence
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