1
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Potemkin AA, Proskurnin MA, Volkov DS. Noise Filtering Algorithm Using Gaussian Mixture Models for High-Resolution Mass Spectra of Natural Organic Matter. Anal Chem 2024; 96:5455-5461. [PMID: 38530650 DOI: 10.1021/acs.analchem.3c05453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
High-resolution mass spectra of natural organic matter (NOM) contain a large number of noise signals. These signals interfere with the correct molecular composition estimation during nontargeted analysis because formula-assignment programs find empirical formulas for such peaks as well. Previously proposed noise filtering methods that utilize the profile of the intensity distribution of mass spectrum peaks rely on a histogram to calculate the intensity threshold value. However, the histogram profile can vary depending on the user settings. In addition, these algorithms are not automated, so they are handled manually. To overcome the mentioned drawbacks, we propose a new algorithm for noise filtering in mass spectra. This filter is based on Gaussian Mixture Models (GMMs), a machine learning method to find the intensity threshold value. The algorithm is completely data-driven and eliminates the need to work with a histogram. It has no customizable parameters and automatically determines the noise level for each individual mass spectrum. The algorithm performance was tested on mass spectra of natural organic matter obtained by averaging a different number of microscans (transients), and the results were compared with other noise filters proposed in the literature. Finally, the effect of this noise filtering approach on the fraction of peaks with assigned formulas was investigated. It was shown that there is always an increase in the identification rate, but the magnitude of the effect changes with the number of microscans averaged. The increase can be as high as 15%.
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Affiliation(s)
- Alexander A Potemkin
- Chemistry Department of M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow 119991, Russia
| | - Mikhail A Proskurnin
- Chemistry Department of M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow 119991, Russia
| | - Dmitry S Volkov
- Chemistry Department of M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow 119991, Russia
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2
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Sozarukova MM, Kochneva EM, Proskurnina EV, Mikheev IV, Novikov DO, Proskurnin MA, Ivanov VK. Albumin Retains Its Transport Function after Interaction with Cerium Dioxide Nanoparticles. ACS Biomater Sci Eng 2023; 9:6759-6772. [PMID: 37955421 DOI: 10.1021/acsbiomaterials.3c01416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
The interaction of inorganic nanomaterials with biological fluids containing proteins can lead not only to the formation of a protein corona and thereby to a change in the biological activity of nanoparticles but also to a significant effect on the structural and functional properties of the biomolecules themselves. This work studied the interaction of nanoscale CeO2, the most versatile nanozyme, with human serum albumin (HSA). Fourier transform infrared spectroscopy, MALDI-TOF mass spectrometry, UV-vis spectroscopy, and fluorescence spectroscopy confirmed the formation of HSA-CeO2 nanoparticle conjugates. Changes in protein conformation, which depend on the concentration of both citrate-stabilized CeO2 nanoparticles and pristine CeO2 nanoparticles, did not affect albumin drug-binding sites and, accordingly, did not impair the HSA transport function. The results obtained shed light on the biological consequences of the CeO2 nanoparticles' entrance into the body, which should be taken into account when engineering nanobiomaterials to increase their efficiency and reduce the side effects.
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Affiliation(s)
- Madina M Sozarukova
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Avenue, 31, Moscow 119991, Russia
| | - Ekaterina M Kochneva
- Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow 119991, Russia
| | - Elena V Proskurnina
- Research Centre for Medical Genetics, Moskvorechye Street, 1, Moscow 115522, Russia
| | - Ivan V Mikheev
- Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow 119991, Russia
| | - Dmitry O Novikov
- Bauman Moscow State Technical University, 2-nd Baumanskaya Street, 5, Moscow 105005, Russia
| | - Mikhail A Proskurnin
- Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow 119991, Russia
| | - Vladimir K Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Avenue, 31, Moscow 119991, Russia
- National Research University Higher School of Economics, Pokrovsky Bulvar, 11, Moscow 109028, Russia
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3
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Khabibullin VR, Ratova DMV, Stolbov DN, Mikheev IV, Proskurnin MA. The Thermophysical and Physicochemical Properties of the Aqueous Dispersion of Graphene Oxide Dual-Beam Thermal Lens Spectrometry. Nanomaterials (Basel) 2023; 13:2126. [PMID: 37513137 PMCID: PMC10385486 DOI: 10.3390/nano13142126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/16/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
Modern heat-conducting materials require special attention to analyze their thermophysical properties. Compared to classical methods, thermal lens spectrometry (TLS) has advantages due to its high sensitivity to physical and chemical composition. To avoid a systematic error in the analysis of complex systems, it is necessary to realize the limits of the applicability of the method. This study considers the features of thermal-diffusivity measurements by TLS in the stationary state for dispersed systems with absorbances up to 0.05. The limits of applicability of the method in analyzing heterogeneous systems are shown, and a mathematical apparatus is proposed for indicating a systematic error in finding thermal diffusivity that does not exceed 1%. Graphene oxide (GO), which has attractive physicochemical properties, was used as the object of analysis. GO belongs to 2D objects, the study of which requires highly sensitive methods and special attention when discussing the results. The thermophysical properties of aqueous dispersions of graphene oxide in a wide range of concentrations (up to 2 g/L) and lateral sizes (up to 4 µm) were studied by TLS. It has been found that with increasing nanophase concentration, the thermal diffusivity of graphene oxide dispersions passes through a minimum, which can be used in solving thermal insulation problems. It has been established that prolonged laser irradiation of the dispersion leads to a change in thermal diffusivity, which indicates the photochemical reduction of graphene oxide.
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Affiliation(s)
- Vladislav R Khabibullin
- Analytical Chemistry Division, Chemistry Department, M. V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1, Moscow 119234, Russia
| | - Daria-Maria V Ratova
- Analytical Chemistry Division, Chemistry Department, M. V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1, Moscow 119234, Russia
| | - Dmitrii N Stolbov
- Physical Chemistry Division, Chemistry Department, M. V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1, Moscow 119234, Russia
| | - Ivan V Mikheev
- Analytical Chemistry Division, Chemistry Department, M. V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1, Moscow 119234, Russia
| | - Mikhail A Proskurnin
- Analytical Chemistry Division, Chemistry Department, M. V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1, Moscow 119234, Russia
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4
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Ratova DMV, Mikheev IV, Chermashentsev GR, Maslakov KI, Kottsov SY, Stolbov DN, Maksimov SV, Sozarukova MM, Proskurnina EV, Proskurnin MA. Green and Sustainable Ultrasound-Assisted Anodic Electrochemical Preparation of Graphene Oxide Dispersions and Their Antioxidant Properties. Molecules 2023; 28:molecules28073238. [PMID: 37050001 PMCID: PMC10096744 DOI: 10.3390/molecules28073238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 04/03/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023] Open
Abstract
A fast method for preparing aqueous graphene oxide (GO) dispersions by electrochemical oxidation of a graphite anode without preliminary intercalation with oxidizing agents is proposed. Ultrasonic probing was used in the modulation mode of ultrasonic waves (work/rest) for more efficient graphite oxidation-exfoliation. It is shown that the 4/2 s mode of ultrasonic modulation is the most effective due to the probe material's low corrosion while maintaining the optimum synthesis temperature not exceeding 30-35 °C and achieving the best characteristics of the resulting product. Three cases of anodic oxidation of graphite to obtain graphene oxide were considered: (1) a combined cathode-anode compartment, (2) a split cathode-anode salt-bridged compartment, and (3) separated anode compartment with a 3.5 kDa dialysis membrane. It was determined that the approach to synthesis with a divided cathode-anode compartment makes it possible to obtain GO sheets with fewer defects compared to chemical methods or methods with a combined cathode-anode compartment and makes it possible to control the oxidation degree of the material (C:O ratio) by varying the current density. The prepared samples showed good stability for more than six months. The spectral and morphological characteristics were studied. Using chemiluminometry in the luminol/Co(II)/H2O2 system, the antioxidant properties concerning three key reactive oxygen species (H2O2, superoxide anion radical, and hydroxyl radical) were demonstrated. It was also shown that the prepared GO dispersions do not induce lipid and phospholipid peroxidation.
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Affiliation(s)
- Daria-Maria V Ratova
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
| | - Ivan V Mikheev
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
| | - Grigoryi R Chermashentsev
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
| | - Konstantin I Maslakov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
| | - Sergei Yu Kottsov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 117901 Moscow, Russia
| | - Dmitrii N Stolbov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
| | - Sergey V Maksimov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
| | - Madina M Sozarukova
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 117901 Moscow, Russia
| | - Elena V Proskurnina
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St., 115522 Moscow, Russia
| | - Mikhail A Proskurnin
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia
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Proskurnin MA, Proskurnina EV, Galimova VR, Alekseev AV, Mikheev IV, Vladimirov YA. Composition of the Cytochrome c Complex with Cardiolipin by Thermal Lens Spectrometry. Molecules 2023; 28:molecules28062692. [PMID: 36985664 PMCID: PMC10057424 DOI: 10.3390/molecules28062692] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/07/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Thermal lens spectrometry along with spectrophotometric titration were used to assess the composition of the complex of oxidized cytochrome c (ferricytochrome c) with 1,1′,2,2′-tetraoleyl cardiolipin, which plays a key role in the initiation of apoptosis. Spectrophotometric titration was carried out for micromolar concentrations at which the complex is mainly insoluble, to assess the residual concentration in the solution and to estimate the solubility of the complex. Thermal lens spectrometry was used as a method of molecular absorption spectroscopy, which has two advantages over conventional optical transmission spectroscopy: the higher sensitivity of absorbance measurements and the possibility of studying the light absorption by chromophores and heat transfer in complex systems, such as living cells or tissues. Thermal lens measurements were carried out at nanomolar concentrations, where the complex is mainly in solution, i.e., under the conditions of its direct measurements. From the thermal lens measurements, the ratios of cytochrome c and cardiolipin in the complex were 50 at pH 7.4; 30 at pH 6.8; and 10 at pH 5.5, which fit well to the spectrophotometric data. The molecular solubility of the complex at pH 6.8–7.4 was estimated as 30 µmol/L.
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Affiliation(s)
- Mikhail A. Proskurnin
- Analytical Chemistry Division, Chemistry Department, M.V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1 V-234, 119991 Moscow, Russia;
- Correspondence: (M.A.P.); (I.V.M.); Tel.: +7-495-939-15-68 (I.V.M.)
| | - Elena V. Proskurnina
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia;
| | - Viktoriya R. Galimova
- Analytical Chemistry Division, Chemistry Department, M.V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1 V-234, 119991 Moscow, Russia;
| | - Andrei V. Alekseev
- Russian Research Institute of Aviation Materials, ul. Radio 17, 105005 Moscow, Russia;
| | - Ivan V. Mikheev
- Analytical Chemistry Division, Chemistry Department, M.V. Lomonosov Moscow State University, d. 1, Str. 3, Lenin Hills, GSP-1 V-234, 119991 Moscow, Russia;
- Correspondence: (M.A.P.); (I.V.M.); Tel.: +7-495-939-15-68 (I.V.M.)
| | - Yuri A. Vladimirov
- Faculty of Basic Medicine, M.V. Lomonosov Moscow State University, Leninskie Gory, A, 119991 Moscow, Russia;
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Proskurnina EV, Mikheev IV, Savinova EA, Ershova ES, Veiko NN, Kameneva LV, Dolgikh OA, Rodionov IV, Proskurnin MA, Kostyuk SV. Effects of Aqueous Dispersions of C 60, C 70, and Gd@C 82 Fullerenes on DNA Oxidative Damage/Repair and Apoptosis in Human Embryonic Lung Fibroblasts. ACS Biomater Sci Eng 2023; 9:1391-1401. [PMID: 36821424 DOI: 10.1021/acsbiomaterials.2c01359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Fullerenes and metallofullerenes play an active role in homeostasis of reactive oxygen species and may cause oxidative damage to cells. As pristine fullerenes are a basis for derivatization, studying oxidative DNA damage/repair and apoptosis is important in terms of genotoxicity and cytotoxicity for their biomedical application. Aqueous dispersions of C60, C70, and Gd@C82 (5 nM and 1.5 μM) were cultured with human fetal lung fibroblasts for 1, 3, 24, and 72 h. Oxidative DNA damage/repair was assessed through concentration of 8-oxodG, double-strand breaks, and activation of BRCA1. Activity of apoptosis was assessed through the BCL2/BAX ratio. All three fullerenes caused oxidative modification of DNA at the early stages; C60 caused the most long-term damage, Gd@C82 caused the most short-term damage, and C70 caused "wave-like" dynamics. The dynamics of DNA repair correlated with the dynamics of oxidative damage, but Gd@C82 caused more prolonged activation of the repair system than C60 or C70. The oxidative toxicity of Gd@C82, is minor and the oxidative toxicity of C60 is mild and short-term, in contrast to C70. In relation to the studied effects, the fullerenes can be arranged in a safety row of Gd@C82 > C60 > C70.
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Affiliation(s)
- Elena V Proskurnina
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Ivan V Mikheev
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow 119991, Russia
| | - Ekaterina A Savinova
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Elizaveta S Ershova
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Natalia N Veiko
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Larisa V Kameneva
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Olga A Dolgikh
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Ivan V Rodionov
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
| | - Mikhail A Proskurnin
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow 119991, Russia
| | - Svetlana V Kostyuk
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, Moscow 115522, Russia
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Khabibullin VR, Usoltseva LO, Mikheev IV, Proskurnin MA. Thermal Diffusivity of Aqueous Dispersions of Silicon Oxide Nanoparticles by Dual-Beam Thermal Lens Spectrometry. Nanomaterials (Basel) 2023; 13:1006. [PMID: 36985901 PMCID: PMC10056864 DOI: 10.3390/nano13061006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/05/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
The growing interest in heat-conducting nanofluids requires highly sensitive methods for analyzing the thermal properties. Thermal lens spectrometry (TLS), despite its advantages over classical methods, does not have a general approach for measuring and interpreting results for dispersed systems. In this paper, for nanofluids of silicon oxide in water in a wide range of concentrations and sizes, the selection of measurement parameters for transient and steady-state thermal lensing is justified, and the interpretation of the results of thermal diffusivity measurements is substantiated. The features of the measurements of thermal diffusivity by TLS under stationary states for dispersed systems are considered. Using this approach, it is possible to detect and distinguish thermal effects with high accuracy. For dispersions of silicon oxide, with increasing concentrations, the thermal diffusivity passes through a minimum threshold. Silicon oxide dispersions can be used both as coolants or as heat-removing liquids by selecting the particle size and concentration.
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Affiliation(s)
| | | | - Ivan V. Mikheev
- Correspondence: (I.V.M.); (M.A.P.); Tel.: +7-495-939-15-68 (I.V.M.)
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Khabibullin VR, Franko M, Proskurnin MA. Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry. Nanomaterials (Basel) 2023; 13:430. [PMID: 36770391 PMCID: PMC9920435 DOI: 10.3390/nano13030430] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Thermal-lens spectrometry is a sensitive technique for determination of physicochemical properties and thermophysical parameters of various materials including heterogeneous systems and nanoparticles. In this paper, we consider the issues of the correctness (trueness) of measurements of the characteristic time of the thermal-lens effect and, thus, of the thermal diffusivity determined by dual-beam mode-mismatching thermal lensing. As sources of systematic errors, major factors-radiation sources, sample-cell and detector parameters, and general measurement parameters-are considered using several configurations of the thermal-lens setups, and their contributions are quantified or estimated. Furthermore, with aqueous ferroin and Sudan I in ethanol as inert colorants, the effects of the intermolecular distance of the absorbing substance on the correctness of finding the thermophysical parameters are considered. The recommendations for checking the operation of the thermal-lens setup to ensure the maximum accuracy are given. The results obtained help reducing the impact of each investigated factor on the value of systematic error and correctly measure the thermophysical parameters using thermal-lens spectrometry.
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Affiliation(s)
- Vladislav R. Khabibullin
- Analytical Chemistry Division, Chemistry Department, M.V. Lomonosov Moscow State University, d. 1, str. 3, Lenin Hills, GSP-1 V-234, Moscow 119991, Russia
| | - Mladen Franko
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Vipavska 13, Rožna Dolina, 5000 Nova Gorica, Slovenia
| | - Mikhail A. Proskurnin
- Analytical Chemistry Division, Chemistry Department, M.V. Lomonosov Moscow State University, d. 1, str. 3, Lenin Hills, GSP-1 V-234, Moscow 119991, Russia
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9
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Mikheev IV, Byvsheva SM, Sozarukova MM, Kottsov SY, Proskurnina EV, Proskurnin MA. High-Throughput Preparation of Uncontaminated Graphene-Oxide Aqueous Dispersions with Antioxidant Properties by Semi-Automated Diffusion Dialysis. Nanomaterials (Basel) 2022; 12:4159. [PMID: 36500782 PMCID: PMC9739863 DOI: 10.3390/nano12234159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/17/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
A semi-automated diffusion-dialysis purification procedure is proposed for the preparation of uncontaminated graphene oxide (GO) aqueous dispersions. The purification process is integrated with analytical-signal processing to control the purification degree online by several channels: oxidation-reduction potential, conductivity, and absorbance. This approach reduces the amounts of reagents for chemical treatment during dialysis. The total transition metal (Mn and Ti) content was reduced to a sub-ppb level (assessed by slurry nebulization in inductively coupled plasma optical atomic emission spectroscopy). Purified aqueous GO samples possess good stability for about a year with a zeta-potential of ca. -40 mV and a lateral size of ca. sub-µm. Purified GO samples showed increased antioxidant properties (up to five times compared to initial samples according to chemiluminometry by superoxide-radical (O2-) generated in situ from xanthine and xanthine oxidase with the lucigenin probe) and significantly decreased peroxidase-like activity (assessed by the H2O2-L-012 system).
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Affiliation(s)
- Ivan V. Mikheev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Sofiya M. Byvsheva
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Madina M. Sozarukova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 117901, Russia
| | - Sergey Yu. Kottsov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 117901, Russia
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10
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Fomina PS, Proskurnin MA, Mizaikoff B, Volkov DS. Infrared Spectroscopy in Aqueous Solutions: Capabilities and Challenges. Crit Rev Anal Chem 2022; 53:1748-1765. [PMID: 35212600 DOI: 10.1080/10408347.2022.2041390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Fourier-transform infrared (FTIR) spectroscopy provides rapid, reliable, quantitative, and qualitative analysis of samples in different aggregation states, i.e., gases, thin films, solids, liquids, etc. However, when analyzing aqueous solutions, particular issues associated with the rather pronounced IR absorption characteristics of water appear to interfere with the solute determination. In this review, Fourier-transform infrared spectroscopic techniques and their analytical capabilities for analyzing aqueous solutions are reviewed, and highlight examples are discussed.
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Affiliation(s)
- Polina S Fomina
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
| | | | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
- Hahn-Schickard, Institute for Microanalysis Systems, Ulm, Germany
| | - Dmitry S Volkov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
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11
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Krivoshein PK, Volkov DS, Rogova OB, Proskurnin MA. FTIR Photoacoustic and ATR Spectroscopies of Soils with Aggregate Size Fractionation by Dry Sieving. ACS Omega 2022; 7:2177-2197. [PMID: 35071906 PMCID: PMC8771961 DOI: 10.1021/acsomega.1c05702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Granulometric fractionation as a source of additional information on organic-matter and inorganic matrix components of soils using FTIR-photoacoustic spectroscopy (FTIR-PAS) supported by attenuated-total reflection FTIR spectroscopy (ATR-FTIR) for a wide range of aggregate fractions (10-5000 μm) was used to compare the sensitivity, reproducibility, information contents, and representativity of fractionated samples. For chernozem and sod-podzolic soils and different agricultural-use chernozem samples, differences in the composition were found, manifested in normalized spectra of microaggregate fractions, with the range of 10-100 μm bearing the complete information. Most changes are observed in the soil organic matter range (1900-1340 cm-1), although these changes are slight, and in the soil-matrix region (550-300 cm-1). The latter region increases the intensity of bands corresponding to amorphous silica and clay minerals in fine fractions, while the intensity of bands attributed to quartz lattice vibrations decreases. FTIR-PAS spectra do not differ considerably at high interferometer modulation frequencies as the signal-penetration depth is comparable with particle sizes. The soil fractions below 20 μm result in the maximum sensitivity, reproducibility, and signal-to-noise ratio, showing no changes from coarser fractions by the information content and, thus, providing representative samples for analysis. The fractionation shows more differences in the sod-podzolic and chernozem soil fractions than the whole soil spectra. FTIR-PAS provides better sensitivity and reproducibility in the 4000-2000 cm-1 region and ATR-FTIR in the 2000-100 cm-1 region.
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Affiliation(s)
- Petr K. Krivoshein
- Chemistry
Department, M.V. Lomonosov Moscow State
University, Leninskie
Gory, 1-3, GSP-1, Moscow 119991, Russia
| | - Dmitry S. Volkov
- Chemistry
Department, M.V. Lomonosov Moscow State
University, Leninskie
Gory, 1-3, GSP-1, Moscow 119991, Russia
- Department
of Chemistry and Physical Chemistry of Soils, V.V. Dokuchaev Soil Science Institute, Pyzhevsky per., 7/2, Moscow 119017, Russia
| | - Olga B. Rogova
- Department
of Chemistry and Physical Chemistry of Soils, V.V. Dokuchaev Soil Science Institute, Pyzhevsky per., 7/2, Moscow 119017, Russia
| | - Mikhail A. Proskurnin
- Chemistry
Department, M.V. Lomonosov Moscow State
University, Leninskie
Gory, 1-3, GSP-1, Moscow 119991, Russia
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12
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Usoltseva LO, Volkov DS, Karpushkin EA, Korobov MV, Proskurnin MA. Thermal Conductivity of Detonation Nanodiamond Hydrogels and Hydrosols by Direct Heat Flux Measurements. Gels 2021; 7:248. [PMID: 34940308 PMCID: PMC8701344 DOI: 10.3390/gels7040248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 11/27/2021] [Accepted: 11/28/2021] [Indexed: 11/22/2022] Open
Abstract
The methodology and results of thermal conductivity measurements by the heat-flow technique for the detonation nanodiamond suspension gels, sols, and powders of several brands in the range of nanoparticle concentrations of 2-100% w/w are discussed. The conditions of assessing the thermal conductivity of the fluids and gels (a FOX 50 heat-flow meter) with the reproducibility (relative standard deviation) of 1% are proposed. The maximum increase of 13% was recorded for the nanodiamond gels (140 mg mL-1 or 4% v/v) of the RDDM brand, at 0.687 ± 0.005 W m-1 K-1. The thermal conductivity of the nanodiamond powders is estimated as 0.26 ± 0.03 and 0.35 ± 0.04 W m-1 K-1 for the RUDDM and RDDM brands, respectively. The thermal conductivity for the aqueous pastes containing 26% v/v RUDDM is 0.85 ± 0.04 W m-1 K-1. The dignities, shortcomings, and limitations of this approach are discussed and compared with the determining of the thermal conductivity with photothermal-lens spectrometry.
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Affiliation(s)
| | - Dmitry S. Volkov
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (L.O.U.); (E.A.K.); (M.V.K.); (M.A.P.)
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13
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Proskurnina EV, Mikheev IV, Savinova EA, Ershova ES, Veiko NN, Kameneva LV, Dolgikh OA, Rodionov IV, Proskurnin MA, Kostyuk SV. Effects of Aqueous Dispersions of C 60, C 70 and Gd@C 82 Fullerenes on Genes Involved in Oxidative Stress and Anti-Inflammatory Pathways. Int J Mol Sci 2021; 22:ijms22116130. [PMID: 34200169 PMCID: PMC8201376 DOI: 10.3390/ijms22116130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/03/2021] [Accepted: 06/05/2021] [Indexed: 12/20/2022] Open
Abstract
Background: Fullerenes and metallofullerenes can be considered promising nanopharmaceuticals themselves and as a basis for chemical modification. As reactive oxygen species homeostasis plays a vital role in cells, the study of their effect on genes involved in oxidative stress and anti-inflammatory responses are of particular importance. Methods: Human fetal lung fibroblasts were incubated with aqueous dispersions of C60, C70, and Gd@C82 in concentrations of 5 nM and 1.5 µM for 1, 3, 24, and 72 h. Cell viability, intracellular ROS, NOX4, NFκB, PRAR-γ, NRF2, heme oxygenase 1, and NAD(P)H quinone dehydrogenase 1 expression have been studied. Results & conclusion: The aqueous dispersions of C60, C70, and Gd@C82 fullerenes are active participants in reactive oxygen species (ROS) homeostasis. Low and high concentrations of aqueous fullerene dispersions (AFD) have similar effects. C70 was the most inert substance, C60 was the most active substance. All AFDs have both “prooxidant” and “antioxidant” effects but with a different balance. Gd@C82 was a substance with more pronounced antioxidant and anti-inflammatory properties, while C70 had more pronounced “prooxidant” properties.
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Affiliation(s)
- Elena V. Proskurnina
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
- Correspondence:
| | - Ivan V. Mikheev
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia; (I.V.M.); (M.A.P.)
| | - Ekaterina A. Savinova
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
| | - Elizaveta S. Ershova
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
- Department of Normal Physiology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 11-5 Mokhovaya St, 125007 Moscow, Russia;
| | - Natalia N. Veiko
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
| | - Larisa V. Kameneva
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
| | - Olga A. Dolgikh
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
| | - Ivan V. Rodionov
- Department of Normal Physiology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 11-5 Mokhovaya St, 125007 Moscow, Russia;
| | - Mikhail A. Proskurnin
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia; (I.V.M.); (M.A.P.)
| | - Svetlana V. Kostyuk
- Laboratory of Molecular Biology, Research Centre for Medical Genetics, 1 Moskvorechye St, 115522 Moscow, Russia; (E.A.S.); (E.S.E.); (N.N.V.); (L.V.K.); (O.A.D.); (S.V.K.)
- Department of Normal Physiology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 11-5 Mokhovaya St, 125007 Moscow, Russia;
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14
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Mikheev IV, Sozarukova MM, Izmailov DY, Kareev IE, Proskurnina EV, Proskurnin MA. Antioxidant Potential of Aqueous Dispersions of Fullerenes C 60, C 70, and Gd@C 82. Int J Mol Sci 2021; 22:5838. [PMID: 34072504 PMCID: PMC8199091 DOI: 10.3390/ijms22115838] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/24/2021] [Accepted: 05/27/2021] [Indexed: 12/28/2022] Open
Abstract
The antioxidant potential (capacity and activity) of aqueous fullerene dispersions (AFD) of non-functionalized C60, C70, and Gd@C82 endofullerene (in micromolar concentration range) was estimated based on chemiluminescence measurements of the model of luminol and generation of organic radicals by 2,2'-azobis(2-amidinopropane) dihydrochloride (ABAP). The antioxidant capacity was estimated by the TRAP method, from the concentration of half-suppression, and from the suppression area in the initial period. All three approaches agree and show that the antioxidant capacity of AFDs increased in the order Gd@C82 < C70 < C60. Mathematical modeling of the long-term kinetics data was used for antioxidant activity estimation. The effect of C60 and C70 is found to be quenching of the excited product of luminol with ABAP-generated radical and not an actual antioxidant effect; quenching constants differ insignificantly. Apart from quenching with a similar constant, the AFD of Gd@C82 exhibits actual antioxidant action. The antioxidant activity in Gd@C82 is 300-fold higher than quenching constants.
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Affiliation(s)
- Ivan V. Mikheev
- Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (M.M.S.); (M.A.P.)
| | - Madina M. Sozarukova
- Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (M.M.S.); (M.A.P.)
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Dmitry Yu. Izmailov
- Faculty of Fundamental Medicine, Lomonosov Moscow State University, 119234 Moscow, Russia;
| | - Ivan E. Kareev
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences, 142432 Moscow, Russia;
| | | | - Mikhail A. Proskurnin
- Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (M.M.S.); (M.A.P.)
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15
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Mikheev IV, Pirogova MO, Usoltseva LO, Uzhel AS, Bolotnik TA, Kareev IE, Bubnov VP, Lukonina NS, Volkov DS, Goryunkov AA, Korobov MV, Proskurnin MA. Green and rapid preparation of long-term stable aqueous dispersions of fullerenes and endohedral fullerenes: The pros and cons of an ultrasonic probe. Ultrason Sonochem 2021; 73:105533. [PMID: 33799110 PMCID: PMC8044700 DOI: 10.1016/j.ultsonch.2021.105533] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/03/2021] [Accepted: 03/16/2021] [Indexed: 05/13/2023]
Abstract
A green, scalable, and sustainable approach to prepare aqueous fullerene dispersions (AFD) C60, C70, endohedral metallofullerene Gd@C82, and their derivatives C60Cl6, C70Cl10, and supramolecular and ester-like derivatives, 10 fullerene species total, is proposed. For the first time, an immersed ultrasonic probe was used to preparing dispersions for pristine fullerenes without addends. Both ultrasound-assisted solvent-exchange and direct sonication techniques for AFD preparation using an immersed probe were tested. The average time for AFD preparation decreases 10-15 times compared to an ultrasound-bath-assisted technique, while final fullerene concentrations in AFDs remained at tens of ppm (up to 80 ppm). The aqueous dispersions showed long-term stability, a negatively charged surface with a zeta potential up to -32 mV with an average nanocluster diameter of no more than 180 nm. The total anionic and cationic compositions of samples were found by inductively coupled plasma atomic emission spectroscopy and chromatographic techniques. The highlights and challenges of using an ultrasound probe for AFD production are discussed.
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Affiliation(s)
- Ivan V Mikheev
- Chemistry Department Analytical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Mariya O Pirogova
- Chemistry Department Analytical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Liliia O Usoltseva
- Chemistry Department Physical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Anna S Uzhel
- Chemistry Department Analytical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Timofey A Bolotnik
- Chemistry Department Analytical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Ivan E Kareev
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russia.
| | - Viacheslav P Bubnov
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russia.
| | - Natalia S Lukonina
- Chemistry Department Physical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Dmitry S Volkov
- Chemistry Department Analytical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Alexey A Goryunkov
- Chemistry Department Physical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Mikhail V Korobov
- Chemistry Department Physical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Mikhail A Proskurnin
- Chemistry Department Analytical Chemistry Division of Lomonosov Moscow State University, 119991 Moscow, Russia.
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16
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Krivoshein PK, Volkov DS, Rogova OB, Proskurnin MA. FTIR photoacoustic spectroscopy for identification and assessment of soil components: Chernozems and their size fractions. Photoacoustics 2020; 18:100162. [PMID: 32551228 PMCID: PMC7292858 DOI: 10.1016/j.pacs.2020.100162] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/12/2020] [Accepted: 01/19/2020] [Indexed: 05/21/2023]
Abstract
FTIR photoacoustic spectroscopy was used to approach inorganic matrix components and organic-matter constituents of chernozem size fractions (1-5000 μm, by dry sieving) with a different history of use (from intact steppe to permanent bare fallow, a continuous long-term field experiment). The conditions of FTIR photoacoustic measurements in continuous-scan modes were compared with attenuated total reflection measurements, the advantages of photoacoustic measurements resulting from a higher intensity of the incident radiation and signal-generating volume were discussed. Overtone peaks of quartz as a soil matrix component at 2000-1700 cm-1 were selected as a possible internal-standard (guide) bands for the comparison of photoacoustic spectra. For different land-use samples, differences in the composition were found, which are differently manifested in normalized spectra of size fractions, with millimeter-size, 20-100 μm, and silt fraction bearing the maximum information.
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Affiliation(s)
- Petr K. Krivoshein
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow, 119991, Russia
| | - Dmitry S. Volkov
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow, 119991, Russia
- Department of Chemistry and Physical Chemistry of Soils, V.V. Dokuchaev Soil Science Institute, Pyzhevsky Per., 7/2, Moscow 119017, Russia
| | - Olga B. Rogova
- Department of Chemistry and Physical Chemistry of Soils, V.V. Dokuchaev Soil Science Institute, Pyzhevsky Per., 7/2, Moscow 119017, Russia
| | - Mikhail A. Proskurnin
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow, 119991, Russia
- Corresponding author.
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17
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V. Mikheev I, M. Sozarukova M, V. Proskurnina E, E. Kareev I, A. Proskurnin M. Non-Functionalized Fullerenes and Endofullerenes in Aqueous Dispersions as Superoxide Scavengers. Molecules 2020; 25:molecules25112506. [PMID: 32481516 PMCID: PMC7321068 DOI: 10.3390/molecules25112506] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 02/06/2023] Open
Abstract
Endohedral metal fullerene are potential nanopharmaceuticals for MRI; thus, it is important to study their effect on reactive oxygen species (ROS) homeostasis. Superoxide anion radical is one of the key ROS. The reactivity of aqueous dispersions of pristine (non-functionalized) fullerenes and Gd@C82 endofullerene have been studied with respect to superoxide in the xanthine/xanthine oxidase chemiluminescence system. It was found that C60 and C70 in aqueous dispersions react with superoxide as scavengers by a similar mechanism; differences in activity are determined by cluster parameters, primarily the concentration of available, acting molecules at the surface. Gd endofullerene is characterized by a significantly (one-and-a-half to two orders of magnitude) higher reactivity with respect to C60 and C70 and is likely to exhibit nanozyme (SOD-mimic) properties, which can be accounted for by the nonuniform distribution of electron density of the fullerene cage due to the presence of the endohedral atom; however, in the cell model, Gd@C82 showed the lowest activity compared to C60 and C70, which can be accounted for by its higher affinity for the lipid phase.
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Affiliation(s)
- Ivan V. Mikheev
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Madina M. Sozarukova
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 117901 Moscow, Russia;
| | | | - Ivan E. Kareev
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences, Chernogolovka, 142432 Moscow Region, Russia;
| | - Mikhail A. Proskurnin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia;
- Correspondence: ; Tel.: +7-495-939-4648
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18
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Volkov DS, Rogova OB, Proskurnin MA. Photoacoustic and photothermal methods in spectroscopy and characterization of soils and soil organic matter. Photoacoustics 2020; 17:100151. [PMID: 31956483 PMCID: PMC6957834 DOI: 10.1016/j.pacs.2019.100151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/14/2019] [Accepted: 12/16/2019] [Indexed: 05/05/2023]
Abstract
Review sums up the application of photoacoustic and photothermal spectroscopies for the analysis and characterization of soils and soil organic matter and discusses the outlooks in this area.
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Affiliation(s)
- Dmitry S. Volkov
- Department of Chemistry and Physical Chemistry of Soils, V.V. Dokuchaev Soil Science Institute, Pyzhevsky per., 7/2, Moscow 119017, Russia
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow, 119991, Russia
| | - Olga B. Rogova
- Department of Chemistry and Physical Chemistry of Soils, V.V. Dokuchaev Soil Science Institute, Pyzhevsky per., 7/2, Moscow 119017, Russia
| | - Mikhail A. Proskurnin
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 1-3, GSP-1, Moscow, 119991, Russia
- Corresponding author.
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19
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Wakao O, Satou K, Nakamura A, Galkina PA, Nishiyama K, Sumiyoshi K, Kurosawa F, Maeki M, Ishida A, Tani H, Proskurnin MA, Shigemura K, Hibara A, Tokeshi M. High-throughput fluorescence polarization immunoassay by using a portable fluorescence polarization imaging analyzer. Lab Chip 2019; 19:2581-2588. [PMID: 31250849 DOI: 10.1039/c9lc00256a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
High-throughput fluorescence polarization immunoassays (FPIAs) for mycotoxin were conducted using a portable FP analyzer with a microdevice. Simultaneous FPIA measurements for 8 different deoxynivalenol (DON) concentrations in 12 chambers (total of 96 samples) and high-throughput FPIA measurements for single DON concentrations in more than 500 chambers were conducted. The results indicated that simultaneous FPIAs for 96 independent samples and for 500 samples were possible by FP imaging. The FP analyzer has a size of 65 cm (W 35 cm × D 15 cm × H 15 cm) and costs less than $5000. The sample volume was 1 nL. Furthermore, it is expected that sample reaction and FP detection can be automatically conducted with the analyzer by changing the microdevice and the software. Its features such as low cost and portability will contribute to on-site measurement and point-of-care testing. Additionally, the high-throughput feature will contribute to the study of molecular interactions based on FP measurements.
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Affiliation(s)
- Osamu Wakao
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Ken Satou
- Tianma Japan, Ltd., Shin-Kawasaki Mitsui Building West Tower 28F 1-1-2, Kashimada, Saiwai-ku, Kawasaki, Kanagawa 212-0058, Japan
| | - Ayano Nakamura
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Polina A Galkina
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-2, Moscow 119991, Russia
| | - Keine Nishiyama
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Ken Sumiyoshi
- Tianma Japan, Ltd., Shin-Kawasaki Mitsui Building West Tower 28F 1-1-2, Kashimada, Saiwai-ku, Kawasaki, Kanagawa 212-0058, Japan
| | - Fumio Kurosawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
| | - Masatoshi Maeki
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
| | - Akihiko Ishida
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
| | - Hirofumi Tani
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
| | - Mikhail A Proskurnin
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-2, Moscow 119991, Russia
| | - Koji Shigemura
- Tianma Japan, Ltd., Shin-Kawasaki Mitsui Building West Tower 28F 1-1-2, Kashimada, Saiwai-ku, Kawasaki, Kanagawa 212-0058, Japan
| | - Akihide Hibara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
| | - Manabu Tokeshi
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
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20
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Usoltseva LO, Volkov DS, Nedosekin DA, Korobov MV, Proskurnin MA, Zharov VP. Absorption spectra of nanodiamond aqueous dispersions by optical absorption and optoacoustic spectroscopies. Photoacoustics 2018; 12:55-66. [PMID: 30450280 PMCID: PMC6222039 DOI: 10.1016/j.pacs.2018.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/07/2018] [Accepted: 10/23/2018] [Indexed: 06/09/2023]
Abstract
The multispectral modality and technique for optically dense samples of optoacoustic spectroscopy were applied to measure spectra and high absorbances of concentrated aqueous dispersions of undoped nanodiamonds. The data from optoacoustic and optical transmission measurements and DSC data of the mean particle size by the Gibbs-Kelvin equation are compared to estimate the difference in composition of various nanodiamond trademarks. Optoacoustic spectra confirm the contribution of surface dimer chains into the absorption of nanodiamonds in the long wavelength range. Optoacoustic and conventional absorption spectra of aqueous solutions of nanodiamond fractions after centrifugation (15300g) and ultracentrifugation (130000g) revealed a separation of a highly absorbing non-diamond sp2 phase. The two-step separation by ultracentrifugation followed by extra centrifugation made it possible to isolate a highly absorbing and soluble nanodiamond phase with the particle size of 3.6 nm, showing a change in spectra compared to the starting nanodiamond material.
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Affiliation(s)
- L O Usoltseva
- Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - D S Volkov
- Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - D A Nedosekin
- Philips Classic Laser Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas, 72205, USA
| | - M V Korobov
- Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - M A Proskurnin
- Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - V P Zharov
- Philips Classic Laser Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas, 72205, USA
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21
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Galimova VR, Liu M, Franko M, Volkov DS, Hibara A, Proskurnin MA. Hemichrome Determination by Thermal Lensing with Polyethylene Glycols for Signal Enhancement in Aqueous Solutions. ANAL LETT 2018. [DOI: 10.1080/00032719.2017.1391828] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Viktoriya R. Galimova
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
- University of Nova Gorica, Laboratory for Environmental Research, Nova Gorica, Slovenia
| | - Mingqiang Liu
- University of Nova Gorica, Laboratory for Environmental Research, Nova Gorica, Slovenia
| | - Mladen Franko
- University of Nova Gorica, Laboratory for Environmental Research, Nova Gorica, Slovenia
| | - Dmitry S. Volkov
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Akihide Hibara
- Institute of Multidisciplinary Research for Advanced Material (IMRAM), Tohoku University, Sendai, Japan
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22
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Fukuyama M, Tokeshi M, Proskurnin MA, Hibara A. Dynamic wettability of polyethylene glycol-modified poly(dimethylsiloxane) surfaces in an aqueous/organic two-phase system. Lab Chip 2018; 18:356-361. [PMID: 29264613 DOI: 10.1039/c7lc01121k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We herein report the preparation of a surface that behaves in a hydrophobic manner but does not undergo protein adsorption in an aqueous/organic two-phase system. We found that polyethylene-glycol (PEG)-modified poly(dimethylsiloxane) (PDMS) exhibits hydrophobic properties when the surface is immersed in an organic solution, while the PEG moiety prevents protein adsorption on the PDMS surface in an aqueous solution at high protein concentrations due to the dynamic behaviour of the PEG moiety. As such, we demonstrated the in-well droplet formation of an aqueous solution containing a high protein concentration. In addition, to demonstrate the feasibility of this method in single cell analyses, a droplet array of a liquid medium containing 10% fetal bovine serum and HeLa cells was formed. The preparation of a droplet array using our PDMS-PEG surface to promote in-well droplet formation avoided the use of flow control equipment and complicated microstructures. We therefore expect that the dynamic wettability of our reported surface will be applicable in single cell and biochemical analyses, such as protein characterisation using crystallography or immunoassays.
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Affiliation(s)
- Mao Fukuyama
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku Sendai 980-8577, Japan.
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Lobko KV, Shishkin MA, Filimonova TA, Volkov DS, Pelivanov IM, Proskurnin MA. Optoacoustic determination of analytical parameters and physicochemical constants in highly concentrated solutions of chromophores. Talanta 2017; 174:206-213. [PMID: 28738569 DOI: 10.1016/j.talanta.2017.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/28/2017] [Accepted: 06/01/2017] [Indexed: 10/19/2022]
Abstract
Determination of chromophores of various classes-rosaniline (fuchsine), cyanidin-3-O-glucoside, tris(1,10-phenanthroline) iron(II), and phenol red - in their concentrated solutions near their solubility limits is performed with the optoacoustic technique for optically dense solutions; light-absorption coefficients of samples range from 0.5 to 500cm-1. The assessment of these substances in organo-aqueous and organic solvents is possible up to ca. 0.1molL-1. Characteristic stability and rate constants of the chelation of iron(II) with 1,10-phenanthroline are determined. It was found that turbidities up to 200 FTU and dynamic viscosities up to 20mPas do not affect the determination. The determination of total anthocyanins (as cyanidin-3-O-glucoside) in bilberry and sweet-cherry juices agrees with the reference spectrophotometric method and demonstrates the possibilities of the optoacoustic technique for the analysis of real samples without dilution and with almost no sample preparation.
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Affiliation(s)
- Kristina V Lobko
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninskie Hills 1/3, GSP-1, 119991 Moscow, Russia.
| | - Mikhail A Shishkin
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninskie Hills 1/3, GSP-1, 119991 Moscow, Russia.
| | - Tatyana A Filimonova
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninskie Hills 1/3, GSP-1, 119991 Moscow, Russia.
| | - Dmitry S Volkov
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninskie Hills 1/3, GSP-1, 119991 Moscow, Russia.
| | - Ivan M Pelivanov
- University of Washington, Department of Bioengineering, Seattle, WA 98195, USA.
| | - Mikhail A Proskurnin
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninskie Hills 1/3, GSP-1, 119991 Moscow, Russia.
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Mikheev IV, Kareev IE, Bubnov VP, Volkov DS, Korobov MV, Proskurnin MA. Aqueous Dispersions of Unmodified Y@C82
(C2v
) Endohedral Metallofullerene. ChemistrySelect 2017. [DOI: 10.1002/slct.201701557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ivan V. Mikheev
- Chemistry Department; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory Moscow; Lomonosov Moscow State University; 119991 Moscow Russia
| | - Ivan E. Kareev
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences; 142432 Chernogolovka, Moscow Region Russia
| | - Vyacheslav P. Bubnov
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences; 142432 Chernogolovka, Moscow Region Russia
| | - Dmitriy S. Volkov
- Chemistry Department; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory Moscow; Lomonosov Moscow State University; 119991 Moscow Russia
| | - Mikhail V. Korobov
- Chemistry Department; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory Moscow; Lomonosov Moscow State University; 119991 Moscow Russia
| | - Mikhail A. Proskurnin
- Chemistry Department; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory Moscow; Lomonosov Moscow State University; 119991 Moscow Russia
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25
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Wayland HA, Boury SN, Chhetri BP, Brandt A, Proskurnin MA, Filichkina VA, Zharov VP, Biris AS, Ghosh A. Advanced Cellulosic Materials for Treatment and Detection of Industrial Contaminants in Wastewater. ChemistrySelect 2016. [DOI: 10.1002/slct.201600653] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hunter A. Wayland
- Department of Chemistry; University of Arkansas at Little Rock; 2801 S. University Ave. Little Rock, AR 72204 United States
| | - Susan N. Boury
- Department of Chemistry; University of Arkansas at Little Rock; 2801 S. University Ave. Little Rock, AR 72204 United States
| | - Bijay P. Chhetri
- Department of Chemistry; University of Arkansas at Little Rock; 2801 S. University Ave. Little Rock, AR 72204 United States
| | - Andrew Brandt
- Department of Chemistry; University of Arkansas at Little Rock; 2801 S. University Ave. Little Rock, AR 72204 United States
| | - Mikhail A. Proskurnin
- M.V. Lomonosov Moscow State University; Chemistry Department; Leninskie Gory 1, str. 3 Moscow 119991 Russia
- National University of Science and Technology MISiS; Leninski prosp 4 Moscow 119049 Russia
| | - Vera A. Filichkina
- National University of Science and Technology MISiS; Leninski prosp 4 Moscow 119049 Russia
| | - Vladimir P. Zharov
- Arkansas Nanomedicine Center; University of Arkansas for Medical Sciences; 4301 W. Markham St. Little Rock, AR 72204 United States
| | - Alexandru S. Biris
- Center for Integrative Nanotechnology Sciences; University of Arkansas at Little Rock; 2801 S. University Ave. Little Rock, AR 72204 United States
| | - Anindya Ghosh
- Department of Chemistry; University of Arkansas at Little Rock; 2801 S. University Ave. Little Rock, AR 72204 United States
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Abstract
Fundamental aspects of rapidly advancing micro/nanofluidic devices are reviewed from the perspective of liquid interface chemistry and physics, including the influence of capillary pressure in microfluidic two-phase flows and phase transitions related to capillary condensation.
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Affiliation(s)
- Akihide Hibara
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology
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27
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Filimonova TA, Volkov DS, Proskurnin MA, Pelivanov IM. Optoacoustic spectroscopy for real-time monitoring of strongly light-absorbing solutions in applications to analytical chemistry. Photoacoustics 2013; 1:54-61. [PMID: 25302150 PMCID: PMC4134900 DOI: 10.1016/j.pacs.2013.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 08/14/2013] [Accepted: 08/16/2013] [Indexed: 05/13/2023]
Abstract
An optoacoustic technique for solutions of strongly light-absorbing analytes at 0.1-0.01 mol l(-1) is proposed. The technique is based on the wide-band forward mode detection of temporal profiles of laser-generated ultrasonic pulses (optoacoustic signals). The leading edge of the signal repeats the distribution of the laser fluence in the medium, which makes it possible to determine its optical absorption and investigate its dynamics during a reaction. The range of light-absorption coefficients starts from 1 to 5 and reaches 10(4) to 10(5) cm(-1). The determination of iron(II) as ferroin shows the possibility of probing 0.1 mol l(-1) of iron(II), which was not previously achieved for this reaction by optical spectroscopy. To further prove the concept, kinetic measurements for ferroin decomposition at the level of 0.1 mol l(-1) and at high pHs are performed. The results are compared with spectrophotometry at lower concentrations and show good reproducibility and accuracy of kinetic constants.
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Nedosekin DA, Saranchina NV, Sukhanov AV, Gavrilenko NA, Mikheev IV, Proskurnin MA. Solid phase-enhanced photothermal lensing with mesoporous polymethacrylate matrices for optical-sensing chemical analysis. Appl Spectrosc 2013; 67:709-717. [PMID: 23816121 DOI: 10.1366/12-06812] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Procedures for the photothermal lens determination of metals and organic compounds, on the basis of solid-phase mesoporous optical-sensing materials (polymethacrylate [PMA]) matrices with immobilized reagents, were developed. These procedures combine (i) selective and efficient preconcentration of trace substances to be analyzed in specially designed and synthesized transparent mesoporous PMA plates; (ii) sensitive determination with the reliable and traceable photometric reactions previously developed for classical spectrophotometry; and (iii) the sensitivity enhancement of photothermal lens detection in polymers, which provides at least a ten-fold increase in sensitivity compared with solutions due to polymer thermo-optical properties (solid phase-enhanced thermal lensing). It is shown that the overall sensitivity of photothermal lens measurements in PMA matrices is two orders higher than photometric absorbance measurements for the same excitation source power, which is in good agreement with the expected theoretical sensitivity. Changes in the preparation of transparent PMA plates and analytical procedures for photothermal measurements compared with spectrophotometry are discussed. PMA matrices modified with various analytical reagents were applied to trace determination of Hg(II), Fe(II), Ag(I), Cu(II), and ascorbic acid, with subnanomolar to nanomolar limits of detection.
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Affiliation(s)
- Dmitry A Nedosekin
- Department of Otolaryngology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
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29
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Korobov MV, Volkov DS, Avramenko NV, Belyaeva LA, Semenyuk PI, Proskurnin MA. Improving the dispersity of detonation nanodiamond: differential scanning calorimetry as a new method of controlling the aggregation state of nanodiamond powders. Nanoscale 2013; 5:1529-1536. [PMID: 23314800 DOI: 10.1039/c2nr33512c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Detonation nanodiamond (ND) is a suitable source material to produce unique samples consisting of almost uniform diamond nanocrystals (d = 3-5 nm). Such samples exist in the form of long stable aqueous dispersions with narrow size distribution of diamond particles. The material is finding ever increasing application in biomedicine. The major problem in producing monodispersed diamond colloids lies in the necessity of deagglomeration of detonation soot and/or removing of clusters formed by already isolated core particles in dry powders. To do this one must have an effective method to monitor the aggregation state or dispersity of powders and gels prior to the preparation of aqueous dispersions. In the absence of dispersity control at various stages of preparation the reproducibility of properties of existing ND materials is poor. In this paper we introduce differential scanning calorimetry (DSC) as a new tool capable to distinguish the state of aggregation in dry and wetted ND materials and to follow changes in this state under different types of treatment. Samples with identical X-ray diffraction patterns (XRD) and high resolution transmission electron microscopy (HRTEM) images gave visibly different DSC traces. Strong correlation was found between dynamic light scattering (DLS) data for colloids and DSC parameters for gels and powders of the same material. Based on DSC data we improved dispersity of existing ND materials and isolated samples with the best possible DSC parameters. These were true monodispersed easily dispersible fractions of ND particles with diameters of ca. 3 nm.
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Affiliation(s)
- Mikhail V Korobov
- Department of Chemistry, Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia.
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30
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Smirnova A, Proskurnin MA, Mawatari K, Kitamori T. Desktop near-field thermal-lens microscope for thermo-optical detection in microfluidics. Electrophoresis 2012; 33:2748-51. [DOI: 10.1002/elps.201200065] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adelina Smirnova
- Applied Chemistry Department; The University of Tokyo; Tokyo; Japan
| | - Mikhail A. Proskurnin
- Analytical Chemistry Division; M.V. Lomonosov Moscow State University; Moscow; Russia
| | - Kazuma Mawatari
- Applied Chemistry Department; The University of Tokyo; Tokyo; Japan
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31
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Nedosekin DA, Faubel W, Proskurnin MA, Pyell U. Sensitivity enhancement in near-field photothermal-lens detection in capillary electrophoresis using laser-induced online precipitation. Appl Spectrosc 2011; 65:1275-1280. [PMID: 22054087 DOI: 10.1366/10-06151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports simultaneous photoinduced precipitation-based online preconcentration of target analytes at the inner walls in capillary zone electrophoresis (CZE) and surface-enhanced near-field crossed-beam photothermal-lens detection of the preconcentrated analytes. A simple technique using online readjustment of the optical scheme of the thermal-lens detector in the course of the separation for gaining optimum sensitivity for both water-soluble and precipitated analytes is proposed. It provides a considerable decrease in the limits of detection (LOD) with good concordance with the previously developed theoretical approach to this combination (D. A. Nedosekin, W. Faubel, M. A. Proskurnin, and U. Pyell, Talanta, 78, 682-690 (2009)). As a result, an enhancement of more than an order of magnitude in the limit of detection of the photoactive 4-aminoazobenzene compared to conventional thermal-lens detection in CZE is achieved while retaining very good sensitivity for unabsorbed analyte (Mordant Yellow 7). The application of the thermal-lens detector to the investigation of laser-induced reactions in flow in capillaries is discussed.
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Affiliation(s)
- Dmitry A Nedosekin
- Phillips Classic Laser and Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
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32
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Proskurnin MA, Zhidkova TV, Volkov DS, Sarimollaoglu M, Galanzha EI, Mock D, Nedosekin DA, Zharov VP. In vivo multispectral photoacoustic and photothermal flow cytometry with multicolor dyes: a potential for real-time assessment of circulation, dye-cell interaction, and blood volume. Cytometry A 2011; 79:834-47. [PMID: 21905207 DOI: 10.1002/cyto.a.21127] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 06/29/2011] [Accepted: 07/26/2011] [Indexed: 01/08/2023]
Abstract
Recently, photoacoustic (PA) flow cytometry (PAFC) has been developed for in vivo detection of circulating tumor cells and bacteria targeted by nanoparticles. Here, we propose multispectral PAFC with multiple dyes having distinctive absorption spectra as multicolor PA contrast agents. As a first step of our proof-of-concept, we characterized high-speed PAFC capability to monitor the clearance of three dyes (Indocyanine Green [ICG], Methylene Blue [MB], and Trypan Blue [TB]) in an animal model in vivo and in real time. We observed strong dynamic PA signal fluctuations, which can be associated with interactions of dyes with circulating blood cells and plasma proteins. PAFC demonstrated enumeration of circulating red and white blood cells labeled with ICG and MB, respectively, and detection of rare dead cells uptaking TB directly in bloodstream. The possibility for accurate measurements of various dye concentrations including Crystal Violet and Brilliant Green were verified in vitro using complementary to PAFC photothermal (PT) technique and spectrophotometry under batch and flow conditions. We further analyze the potential of integrated PAFC/PT spectroscopy with multiple dyes for rapid and accurate measurements of circulating blood volume without a priori information on hemoglobin content, which is impossible with existing optical techniques. This is important in many medical conditions including surgery and trauma with extensive blood loss, rapid fluid administration, and transfusion of red blood cells. The potential for developing a robust clinical PAFC prototype that is safe for human, and its applications for studying the liver function are further highlighted.
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33
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Brusnichkin AV, Nedosekin DA, Galanzha EI, Vladimirov YA, Shevtsova EF, Proskurnin MA, Zharov VP. Ultrasensitive label-free photothermal imaging, spectral identification, and quantification of cytochrome c in mitochondria, live cells, and solutions. J Biophotonics 2010. [PMID: 20572284 DOI: 10.1002/jbio.v3.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Light-absorbing endogenous cellular proteins, in particular cytochrome c, are used as intrinsic biomarkers for studies of cell biology and environment impacts. To sense cytochrome c against real biological backgrounds, we combined photothermal (PT) thermal-lens single-channel schematic in a back-synchronized measurement mode and a multiplex thermal-lens schematic in a transient high resolution (ca. 350 nm) imaging mode. These multifunctional PT techniques using continuous-wave (cw) Ar+ laser and a nanosecond pulsed optical parametric oscillator in the visible range demonstrated the capability for label-free spectral identification and quantification of trace amounts of cytochrome c in a single mitochondrion alone or within a single live cell. PT imaging data were verified in parallel by molecular targeting and fluorescent imaging of cellular cytochrome c. The detection limit of cytochrome c in a cw mode was 5 x 10(-9) mol/L (80 attomols in the signal-generation zone); that is ca. 10³ lower than conventional absorption spectroscopy. Pulsed fast PT microscopy provided the detection limit for cytochrome c at the level of 13 zmol (13 x 10(-21) mol) in the ultrasmall irradiated volumes limited by optical diffraction effects. For the first time, we demonstrate a combination of high resolution PT imaging with PT spectral identification and ultrasensitive quantitative PT characterization of cytochrome c within individual mitochondria in single live cells. A potential of far-field PT microscopy to sub-zeptomol detection thresholds, resolution beyond diffraction limit, PT Raman spectroscopy, and 3D imaging are further highlighted.
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Affiliation(s)
- Anton V Brusnichkin
- Chemistry Department, M. V. Lomonosov Moscow State University, Vorob'evy Hills 1/3, Moscow 119991, Russia
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Brusnichkin AV, Nedosekin DA, Galanzha EI, Vladimirov YA, Shevtsova EF, Proskurnin MA, Zharov VP. Ultrasensitive label-free photothermal imaging, spectral identification, and quantification of cytochrome c in mitochondria, live cells, and solutions. J Biophotonics 2010; 3:791-806. [PMID: 20572284 PMCID: PMC3350104 DOI: 10.1002/jbio.201000012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Light-absorbing endogenous cellular proteins, in particular cytochrome c, are used as intrinsic biomarkers for studies of cell biology and environment impacts. To sense cytochrome c against real biological backgrounds, we combined photothermal (PT) thermal-lens single-channel schematic in a back-synchronized measurement mode and a multiplex thermal-lens schematic in a transient high resolution (ca. 350 nm) imaging mode. These multifunctional PT techniques using continuous-wave (cw) Ar+ laser and a nanosecond pulsed optical parametric oscillator in the visible range demonstrated the capability for label-free spectral identification and quantification of trace amounts of cytochrome c in a single mitochondrion alone or within a single live cell. PT imaging data were verified in parallel by molecular targeting and fluorescent imaging of cellular cytochrome c. The detection limit of cytochrome c in a cw mode was 5 x 10(-9) mol/L (80 attomols in the signal-generation zone); that is ca. 10³ lower than conventional absorption spectroscopy. Pulsed fast PT microscopy provided the detection limit for cytochrome c at the level of 13 zmol (13 x 10(-21) mol) in the ultrasmall irradiated volumes limited by optical diffraction effects. For the first time, we demonstrate a combination of high resolution PT imaging with PT spectral identification and ultrasensitive quantitative PT characterization of cytochrome c within individual mitochondria in single live cells. A potential of far-field PT microscopy to sub-zeptomol detection thresholds, resolution beyond diffraction limit, PT Raman spectroscopy, and 3D imaging are further highlighted.
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Affiliation(s)
- Anton V. Brusnichkin
- Chemistry Department, M.V. Lomonosov Moscow State University, Vorob’evy Hills 1/3, Moscow, 119991, Russia
| | - Dmitry A. Nedosekin
- Chemistry Department, M.V. Lomonosov Moscow State University, Vorob’evy Hills 1/3, Moscow, 119991, Russia
- Phillips Classic Laser and Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
| | - Ekaterina I. Galanzha
- Phillips Classic Laser and Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
| | - Yuri A. Vladimirov
- Faculty of Basic Medicine, M.V. Lomonosov Moscow State University, Lomonosovskii prosp. 31-5, Moscow, 117192, Russia
| | - Elena F. Shevtsova
- Institute of Physiologically Active Substances of the Russian Academy of Sciences, Chernogolovka, Moscow Region, 142432, Russia
| | - Mikhail A. Proskurnin
- Chemistry Department, M.V. Lomonosov Moscow State University, Vorob’evy Hills 1/3, Moscow, 119991, Russia
| | - Vladimir P. Zharov
- Phillips Classic Laser and Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
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Nedosekin DA, Brusnichkin AV, Luk'yanov AY, Eremin SA, Proskurnin MA. Heterogeneous thermal-lens immunoassay for small organic compounds: determination of 4-aminophenol. Appl Spectrosc 2010; 64:942-948. [PMID: 20719060 DOI: 10.1366/000370210792081136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
4-Aminophenol was selected as a model hapten for thermal-lens detection in a heterogeneous indirect immunoassay for small organic compounds. The assay is based on the competition of the free hapten and 4-aminophenol labeled with tetramethyl rhodamine isothiocyanate (TRITC) for rabbit anti-4-aminophenol antibodies (4-AP-GA-BSA) immobilized on a transparent poly(ethylene terephthalate) plate. The amount of the colored analyte was directly measured by thermal lensing at the plate surface. The developed method is specific for 4-aminophenol. The limit of detection is 2 x 10(-7) M, which corresponds to the absolute amount of 3 x 10(-11) mol of 4-aminophenol. The sensitivities of the developed thermal-lens and fluorescence-based measurements of the immunoassay under the same conditions are in good agreement with the expected and discussed theoretical sensitivities of photothermal and fluorescence measurements.
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Affiliation(s)
- Dmitry A Nedosekin
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory, 119991, GSP-1 Moscow, Russia
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Proskurnin MA, Ageeva EV, Senyuta VV, Orlova NV, Fokin AV, Ovchinnikov OB, Egerev SV. Comparison of optoacoustic and photothermal-lens determination of lipopolysaccharides. Talanta 2010; 81:377-84. [DOI: 10.1016/j.talanta.2009.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2009] [Revised: 12/06/2009] [Accepted: 12/10/2009] [Indexed: 10/20/2022]
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38
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Gorkin PA, Proskurnin MA, Zuev BK, Zhirkov AA, Yagov VV. Current-induced thermal-lens spectrometry. Opt Lett 2009; 34:680-682. [PMID: 19252591 DOI: 10.1364/ol.34.000680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A new spectroelectrochemical method using the thermal-lens effect from electrolytes using regular joule heat generation by current focusing in a small-sized channel is proposed. The experimental dependences of the signal on the analyte concentration and applied voltage are in good concordance with the theoretical estimations. A cell design providing good reproducibility and sensitivity of measurements is proposed.
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Affiliation(s)
- Pavel A Gorkin
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
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Smirnova A, Proskurnin MA, Bendrysheva SN, Nedosekin DA, Hibara A, Kitamori T. Thermooptical detection in microchips: from macro- to micro-scale with enhanced analytical parameters. Electrophoresis 2008; 29:2741-53. [PMID: 18546176 DOI: 10.1002/elps.200700914] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In this paper, we compared the methods of photothermal spectroscopy used in different spatial scales, namely thermal-lens spectrometry (TLS) and thermal-lens microscopy (TLM) to enhance the performance parameters in analytical procedures. All of the experimental results were confirmed by theoretical calculation. It was proven that the design for both TLM and TLS, despite a different scale for the effect, is governed by the same signal-generating and probing conditions (probe beam diameter at the sample should be equal to the diameter of the blooming thermal lens), and almost does not depend on the nature of the solvent. Theoretical and experimental instrumental error curves for thermal lensing were coincident. TLM obeys the same law of instrumental error as TLS and shows better repeatability for the same levels of thermal-lens signals or absorbances. TLS is more advantageous for studying low concentrations in bulk, while TLM shows much lower absolute LODs due to better repeatability for low amounts. The behavior of the thermal-lens signal with different flow rates was studied and optimum conditions, with the minimum contribution to total error, were found. These conditions are reproducible, are in agreement with the existing theory of the thermal response in thermal lensing, and do not significantly affect the design of the optimum scheme for setups. TLM showed low LODs in solvent extraction (down to 10(-8) M) and electrokinetic separation (10(-7) M), which were shown to be governed by discussed instrumental regularities, instead of by microchemistry.
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Affiliation(s)
- Adelina Smirnova
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo, Japan
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40
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Proskurnin MA, Volkov ME. Mode-mismatched dual-beam differential thermal lensing with optical scheme design optimized using expert estimation for analytical measurements. Appl Spectrosc 2008; 62:439-449. [PMID: 18416904 DOI: 10.1366/000370208784046867] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The optimization of the optical scheme design of a mode-mismatched dual-beam thermal-lens spectrometer for differential (dual-cell) measurements in a far-field mode using diffraction thermal-lens theory is carried out. A criterion for an expert estimation of the quality of the spectrometer design for differential thermal-lens measurements in analytical chemistry (sensitivity, low limits of detection, and quantification) is also developed. The theoretical calculations agree well with previous papers on differential thermal lensing. Using the example of iron(II) tris-(1,10-phenanthrolinate), it is shown that the blank signal compensation in differential thermal lens spectrometry provides a decrease in the limit of detection by an order of magnitude compared to the decrease in single-cell measurements. Using an artificial two-component mixture of ferroin and potassium dichromate, it is shown that dual-beam differential thermal lens spectrometry makes it possible to determine trace components against 900-fold excess amounts of interfering substances.
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Affiliation(s)
- Mikhail A Proskurnin
- Analytical Chemistry Division, M.V. Lomonosov Moscow State University, Moscow, Russia.
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Khrycheva AD, Nedosekin DA, Proskurnin MA, Kononets MY, Pakhomova SV, Faubel W. Photothermal deflection determination of iron(II) with ferrozine with sorption preconcentration on Silufol plates. Appl Spectrosc 2008; 62:450-457. [PMID: 18416905 DOI: 10.1366/000370208784046821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Photothermal deflection spectroscopy was applied to the selective detection of iron(II) chelate with ferrozine by its sorption preconcentration on Silufol plates. The linearity range was 1 x 10(-11) - 6 x 10(-8) mol cm(-2) of chelate at the plate surface, which corresponded to 1 x 10(-9) -4 x 10(-6) M of chelate in solution. The limits of detection and quantification are 8 x 10(-12) and 2.5 x 10(-11) mol cm(-2) at the plate from 15 microL of test solution (0.5 nM and 1.5 nM in solution, respectively), and the absolute detection limit is 8 fmol in the whole spot applied to a plate. Characteristics and features of photothermal deflection detection are discussed.
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Affiliation(s)
- A D Khrycheva
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
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Smirnova A, Shimura K, Hibara A, Proskurnin MA, Kitamori T. Pesticide analysis by MEKC on a microchip with hydrodynamic injection from organic extract. J Sep Sci 2008; 31:904-8. [DOI: 10.1002/jssc.200700533] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
An approach for mode-mismatched two-beam (pump-probe) photothermal lens detection of multipoint light-absorbing targets in solution (e.g., gold nanoparticles) is developed for continuous-wave intensity-modulated laser-excitation mode. A description of the blooming of the thermooptical element (thermal lens) upon absorption of the excitation laser radiation is based on the summation of individual thermal waves from multiple heat sources. This description makes it possible to estimate the irregularities of the temperature (and, thus, the refractive index) profile for a discrete number of nanoparticles in the irradiated area and a change in the concentration and particle size parameters. Experimental results are in good agreement with theoretical dependences of the photothermal signal on nanoparticle size and concentration and excitation laser power. Calibration plots for particles from 2 to 250 nm show long linear ranges, limits of detection of gold nanoparticles at the level of hundreds of nanoparticles with the current setup, and the photothermal-lens sensitivity coefficient increases as a cubic function of particle size. Further improvements are discussed, including increasing the sensitivity thresholds up to one nanoparticle in the detected volume.
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Affiliation(s)
- Anton V Brusnichkin
- M. V. Lomonosov Moscow State University, Chemistry Department, Vorob'evy Hills 1/3, GSP-3 Moscow, Russia
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Smirnova A, Shimura K, Hibara A, Proskurnin MA, Kitamori T. Application of a Micro Multiphase Laminar Flow on a Microchip for Extraction and Determination of Derivatized Carbamate Pesticides. ANAL SCI 2007; 23:103-7. [PMID: 17213633 DOI: 10.2116/analsci.23.103] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Determination of carbamate pesticides such as carbaryl, carbofuran, propoxur and bendiocarb was demonstrated on a microchip with newly designed microchannels developed for efficient solvent extraction. The pesticides were hydrolyzed to corresponding naphthols, coupled with p-nitrobenzenediazonium fluoroborate reagent, and then extracted into 1-butanol as colored azo derivatives and detected with a thermal lens microscope. Optimum flow rates for the aqueous and organic phases were evaluated in the continuous-flow chemical process established in the microchip. The calibration lines showed good linearity in the range of concentrations of 0.03 - 3 ppm (10(-7) - 10(-5) M) and a mass detection limit down to a nanogram level was achieved that is at least two orders of magnitude lower than the LODs for conventional spectrophotometric methods. Azo derivatives of the pesticides were successfully separated and identified by micellar electrokinetic chromatography (MEKC) using a sample prepared on a bulk scale.
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Bendrysheva SN, Proskurnin MA, Pyell U, Faubel W. Sensitivity improvement in capillary electrophoresis using organo-aqueous separation buffers and thermal lens detection. Anal Bioanal Chem 2006; 385:1492-503. [PMID: 16865338 DOI: 10.1007/s00216-006-0602-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Revised: 05/31/2006] [Accepted: 06/08/2006] [Indexed: 10/24/2022]
Abstract
It is shown that organo-aqueous separation buffers show much promise when used in capillary electrophoresis separations with photothermal (thermal lens) detection systems. Acetonitrile-water and methanol-water mixtures were selected, as conventionally used in capillary electrophoresis. It is shown that, despite more sophisticated experimental conditions (significant heat outflow from the capillary body) and peak detection, the theoretical ratio of the thermal lens signal for a binary mixture to the thermal lens signal for an aqueous solution (or the corresponding ratio obtained experimentally under bulk batch conditions) can be used to predict the sensitivity of thermal lens detection in capillary electrophoresis. The limits of detection for 2-, 3-, and 4-nitrophenols selected as model compounds in 70% v/v acetonitrile separation buffers are 1 x 10(-6) M, 1 x 10(-6) M and 3 x 10(-7) M, respectively, and are therefore decreased by a factor of six compared to thermal lens detection in aqueous separation buffers. The overall increase in the thermal lens detection sensitivity in a 100% ACN buffer is a factor of 13.
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Smirnova A, Mawatari K, Hibara A, Proskurnin MA, Kitamori T. Micro-multiphase laminar flows for the extraction and detection of carbaryl derivative. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2005.10.073] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Proskurnin MA, Bendrysheva SN, Ragozina N, Heissler S, Faubel W, Pyell U. Optimization of instrumental parameters of a near-field thermal-lens detector for capillary electrophoresis. Appl Spectrosc 2005; 59:1470-9. [PMID: 16390585 DOI: 10.1366/000370205775142494] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The optical scheme of a near-field dual-beam mode-mismatched thermal-lens detector for capillary electrophoresis with a crossed-beam configuration employing a multimode HeCd laser (325 nm) as an excitation source was optimized. It is shown that a multimode laser can be successfully used as an excitation source in thermal lensing with minimal deviations in thermal responses from Gaussian excitation sources. An equation for diffraction thermal-lens theory for near-field measurements is deduced, and the experimental results agree with the deduced equation. The temperature rise in the capillary was estimated, and the exponential decrease of the signal with time for static conditions and low flow velocities was explained. The optimum configuration of the detector from the viewpoint of the maximum sensitivity and beam sizes was found. The detector provides a significant improvement in the detection limits for model compounds absorbing at 325 nm (nitrophenols) compared to the results obtained with a commercial absorbance detector operating at the same wavelength.
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Affiliation(s)
- Mikhail A Proskurnin
- M.V. Lomonosov Moscow State University, Chemistry Department, Vorob'evy Hills d. 1 str. 3 119992 GSP-3 Moscow, Russia.
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Nedosekin DA, Proskurnin MA, Kononets MY. Model for continuous-wave laser-induced thermal lens spectrometry of optically transparent surface-absorbing solids. Appl Opt 2005; 44:6296-306. [PMID: 16237948 DOI: 10.1364/ao.44.006296] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A theoretical model for cw laser-induced thermal lens spectrometry of optically transparent surface-absorbing solids is developed. In the model, the sample is represented as a set of discrete layers with certain thicknesses and light absorptivities. The bloomed thermo-optical element in the sample is described with a summation of heat-flux functions for all the layers. The model employs simple mathematical expressions and can be used for both steady-state and time-resolved thermal lens experiments. Good coincidence of the experimental and theoretically predicted signal dependences is achieved. This model is verified for volume-absorbing samples (colored optical glasses) and used successfully to calculate absorbances and concentrations for various surface-absorbing samples.
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Affiliation(s)
- Dmitry A Nedosekin
- Division of Analytical Chemistry, Department of Chemistry, M. V. Lomonosov Moscow State University, Vorob'evy Hills, Moscow 119992, GSP-2, Russia
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Proskurnin MA, Luk'yanov AY, Bendrysheva SN, Bendryshev AA, Pirogov AV, Shpigun OA. Optical photothermal detection in HPLC. Anal Bioanal Chem 2003; 375:1204-11. [PMID: 12733040 DOI: 10.1007/s00216-002-1720-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2002] [Revised: 11/21/2002] [Accepted: 11/21/2002] [Indexed: 10/20/2022]
Abstract
A mode-mismatched parallel dual-beam thermal lens spectrometer with a far-field single-channel detector system was used as a detector in HPLC. An expert estimation of the measurement results was applied to optimize the optical-scheme configuration of the spectrometer to achieve the longest linear calibration range and highest repeatability under chromatographic flow conditions. Chelates with 4-(2-pyridylazo)resorcinol were separated and determined with the limits of detection of n x 10(-8)- n x 10(-7) mol L(-1); the relative standard deviation of measurements was 46%. Xylenol Orange, 4-(2-thiazolylazo)resorcinol, and dithizone were studied as post-column reagents in thermal lens detection in ion chromatography. The limits of detection were n x 10(-8)- n x 10(-7) mol L(-1); the linear calibration ranges were about three orders; the relative standard deviation of measurements was 3-7%. A combined photothermal-refractometric detector for HPLC based on a polarization interferometer is proposed. Metal complexes as 4-(pyridylazo)resorcinol chelates (limits of detection of n x 10(-8)- n x 10(-7) mol L(-1)) and sugars (limits of detection of 10-20 ng L(-1)) were investigated as model substances. Obtained results were compared with results for traditional detectors, which show that photothermal detection has higher sensitivity than photometric and other absorption detectors.
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Affiliation(s)
- M A Proskurnin
- Chemistry Department, M.V. Lomonosov Moscow State University, Vorob'evy Hills, 119992 GSP-2, Moscow, Russia.
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