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Long-Term Effect of Low-Frequency Electromagnetic Irradiation in Water and Isotonic Aqueous Solutions as Studied by Photoluminescence from Polymer Membrane. Polymers (Basel) 2021; 13:polym13091443. [PMID: 33947044 PMCID: PMC8124172 DOI: 10.3390/polym13091443] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 04/18/2021] [Accepted: 04/25/2021] [Indexed: 12/16/2022] Open
Abstract
The swelling of a polymer membrane NafionTM in deionized water and isotonic NaCl and Ringer’s solutions was studied by photoluminescent spectroscopy. According to our previous studies, the surface of this membrane could be considered as a model for a cellular surface. Liquid samples, in which the membrane was soaked, were subjected to preliminary electromagnetic treatment, which consisted of irradiating these samples with electric rectangular pulses of 1 µs duration using platinum electrodes immersed in the liquid. We used a series of pulses with a repetition rate of 11–125 Hz; the pulse amplitudes were equal to 100 and 500 mV. It turned out that at certain pulse repetition rates and their amplitudes, the characteristic swelling time of the polymer membrane significantly differs from the swelling time in untreated (reference) samples. At the same time, there is no effect for certain frequencies/pulse amplitudes. The time interval between electromagnetic treatment and measurements was about 20 min. Thus, in our experiments the effects associated with the long-term relaxation of liquids on the electromagnetic processing are manifested. The effect of long-term relaxation could be associated with a slight change in the geometric characteristics of bubston clusters during electromagnetic treatment.
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2
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Antioxidant and Gene-Protective Properties of Ethylmethylhydroxypyridine Succinate (Mexidol) in X-Ray Irradiation. Pharm Chem J 2020. [DOI: 10.1007/s11094-020-02255-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Zhou W, Liu L, Zhou B, Weng L, Li J, Liu C, Yang S, Wu C, Liu K. Electrokinetic potential reduction of fine particles induced by gas nucleation. ULTRASONICS SONOCHEMISTRY 2020; 67:105167. [PMID: 32442929 DOI: 10.1016/j.ultsonch.2020.105167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/10/2020] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
Electrokinetic potential of particles has been extensively studied in colloidal systems over the past century, while up to date, the influence of gas on electrokinetic behaviors of particles has not been fully understood yet. In this study, the electrokinetic response of particles to gas nucleation was systematically investigated with coal as the object. The results showed that the nucleation of gas (both on particle surfaces and in water) significantly changed the particle' electrokinetic behaviors. Higher gas content and particle's surface hydrophobicity normally trigger more intensive gas nucleation, thus inducing more significant reduction of particle zeta potential. After gas nucleation, numerous nanobubbles (NBs) appear in the suspensions mainly in two forms: NBs adhering onto solid surfaces (ANBs) and NBs stagnating in bulk solutions (BNBs). ANBs not only enhance the surface heterogeneity, but also cause the "steric hindrance" effect, and electric double layer (EDL) overlapping and associated ions shielding towards charged particles, which significantly decrease their electrokinetic potentials. Although BNBs can also reduce the zeta potential of particles by EDL compressing, their functions are rather limited.
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Affiliation(s)
- Weiguang Zhou
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Liming Liu
- School of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, China
| | - Baonan Zhou
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Li Weng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
| | - Junguo Li
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
| | - Cheng Liu
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Siyuan Yang
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Changning Wu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Ke Liu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China; School of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China.
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4
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Li L, Liu Y, Wang S, Zou J, Ding W, Shen W. Magnesium Hydride-Mediated Sustainable Hydrogen Supply Prolongs the Vase Life of Cut Carnation Flowers via Hydrogen Sulfide. FRONTIERS IN PLANT SCIENCE 2020; 11:595376. [PMID: 33362825 PMCID: PMC7755932 DOI: 10.3389/fpls.2020.595376] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/13/2020] [Indexed: 05/08/2023]
Abstract
Magnesium hydride (MgH2) is a promising solid-state hydrogen source with high storage capacity (7.6 wt%). Although it is recently established that MgH2 has potential applications in medicine because it sustainably supplies hydrogen gas (H2), the biological functions of MgH2 in plants have not been observed yet. Also, the slow reaction kinetics restricts its practical applications. In this report, MgH2 (98% purity; 0.5-25 μm size) was firstly used as a hydrogen generation source for postharvest preservation of flowers. Compared with the direct hydrolysis of MgH2 in water, the efficiency of hydrogen production from MgH2 hydrolysis could be greatly improved when the citrate buffer solution is introduced. These results were further confirmed in the flower vase experiment by showing higher efficiency in increasing the production and the residence time of H2 in solution, compared with hydrogen-rich water. Mimicking the response of hydrogen-rich water and sodium hydrosulfide (a hydrogen sulfide donor), subsequent experiments discovered that MgH2-citrate buffer solution not only stimulated hydrogen sulfide (H2S) synthesis but also significantly prolonged the vase life of cut carnation flowers. Meanwhile, redox homeostasis was reestablished, and the increased transcripts of representative senescence-associated genes, including DcbGal and DcGST1, were partly abolished. By contrast, the discussed responses were obviously blocked by the inhibition of endogenous H2S with hypotaurine, an H2S scavenger. These results clearly revealed that MgH2-supplying H2 could prolong the vase life of cut carnation flowers via H2S signaling, and our results, therefore, open a new window for the possible application of hydrogen-releasing materials in agriculture.
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Affiliation(s)
- Longna Li
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yuhao Liu
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Shu Wang
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jianxin Zou
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, China
| | - Wenjiang Ding
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, China
| | - Wenbiao Shen
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Wenbiao Shen,
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5
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Midtvedt D, Eklund F, Olsén E, Midtvedt B, Swenson J, Höök F. Size and Refractive Index Determination of Subwavelength Particles and Air Bubbles by Holographic Nanoparticle Tracking Analysis. Anal Chem 2019; 92:1908-1915. [DOI: 10.1021/acs.analchem.9b04101] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Daniel Midtvedt
- Division of Biological Physics, Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Fredrik Eklund
- Division of Biological Physics, Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Erik Olsén
- Division of Biological Physics, Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Benjamin Midtvedt
- Division of Biological Physics, Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Jan Swenson
- Division of Biological Physics, Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Fredrik Höök
- Division of Biological Physics, Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
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Rak D, Ovadová M, Sedlák M. (Non)Existence of Bulk Nanobubbles: The Role of Ultrasonic Cavitation and Organic Solutes in Water. J Phys Chem Lett 2019; 10:4215-4221. [PMID: 31295404 DOI: 10.1021/acs.jpclett.9b01402] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A drawback of studies on bulk nanobubbles is the absence of direct proof that the nano-objects reported are really nanobubbles. The aim of our work was to provide such a proof or disproof. We focused on two effects (processes) commonly considered in research on nanobubbles: ultrasonic cavitation and addition of organic compounds to water, which could create in principle a barrier at the gas/water interface contributing to the stability of nanobubbles. We found that both of these processes lead to the generation of nano-objects, which are, however, not bulk nanobubbles. Ultrasonication leads to the formation of fine metal nanoparticles originating from the disintegration of the surface of the metal ultrasonic probe. Addition of organic solutes to water leads to the formation of a population of nanoparticles/nanodroplets originating from the so-called mesoscale solubilization of hydrophobic compounds present in the added solute as molecularly dissolved impurities. Subsequent ultrasonication of such mixtures adds metal nanoparticles and only slightly modifies the size distribution of mesoscale particles. While our results do not dismiss existence of nanobubbles in general, described effects must be seriously taken into account, especially in the case of biomedical applications where they can result in serious side effects.
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Affiliation(s)
- Dmytro Rak
- Institute of Experimental Physics , Slovak Academy of Sciences , Watsonova 47 , 040 01 Košice , Slovakia
| | - Michaela Ovadová
- Institute of Experimental Physics , Slovak Academy of Sciences , Watsonova 47 , 040 01 Košice , Slovakia
| | - Marián Sedlák
- Institute of Experimental Physics , Slovak Academy of Sciences , Watsonova 47 , 040 01 Košice , Slovakia
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Abstract
The state of oxygen in aqueous supersaturated solutions prepared by different methods was studied using high-resolution ultrasonic spectroscopy in combination with other techniques. This allowed for nondestructive evaluation of the properties of oxygen solute particles, composed of oxygen molecules and surrounding (coordinating) molecules of water, at equilibrium, supersaturated conditions, and different temperatures and concentrations of O2. The results were compared with the behaviors of other types of solutes in water, including H2O2, which has similar molecular size and mass to O2 but is characterized by a significantly different type of interaction with water molecules. Additionally, theoretical modeling was performed to assess the ultrasonic characteristics of dispersions of oxygen nanobubbles stabilized by a surface electrical charge. The obtained data indicate a clathrate-like organization of water in the coordination shells of single molecules of O2. We did not find any signs of formation of clusters of oxygen molecules in supersaturated solutions. No quantifiable presence of oxygen nanobubbles in the solutions was detected. The state of O2 molecules was not affected by supersaturation within the analyzed concentration range of oxygen. The results also demonstrated the potential of the ultrasonic technique in precision real-time nondestructive monitoring of oxygen solubilization and outgassing processes.
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Affiliation(s)
- Yuelong Li
- School of Chemistry, College of Life Science , University College Dublin , Belfield Campus , Dublin 4 , Ireland
| | - Vitaly Buckin
- School of Chemistry, College of Life Science , University College Dublin , Belfield Campus , Dublin 4 , Ireland
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8
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Bunkin NF, Shkirin AV, Lyakhov GA, Kobelev AV, Penkov NV, Ugraitskaya SV, Fesenko EE. Droplet-like heterogeneity of aqueous tetrahydrofuran solutions at the submicrometer scale. J Chem Phys 2017; 145:184501. [PMID: 27846700 DOI: 10.1063/1.4966187] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A droplet formation in aqueous solutions of tetrahydrofuran (THF) has been experimentally detected at the submicrometer scale using two independent laser diagnostic techniques (dynamic light scattering and laser phase microscopy) and described in terms of THF-water intermolecular hydrogen bonding. It is shown that the nanodroplets have a mean size of 300 nm, their refractive index is higher than that of the ambient liquid, and they are highly enriched with THF molecules. The maximum of light scattering intensity falls within the THF concentration range 2-8 mol. %, which corresponds to the volume number density of the nanodroplets ∼1010-1011 cm-3. A theoretical explanation of forming the nanodroplets with a high content of THF, which is based on a model of dichotomous noise being applied to the so-termed "twinkling" hydrogen bonds and involves spinodal decomposition in the unstable region enclosed within the dichotomous binodal, is proposed. The parameters of hydrogen bonds in the molecular system "water-THF" were found, and the phase diagram of the solution with allowance for cross-linking hydrogen bonds was constructed.
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Affiliation(s)
- N F Bunkin
- Bauman State Technical University, 2nd Baumanskaya ul. 5, Moscow 105005, Russia
| | - A V Shkirin
- Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow 119991, Russia
| | - G A Lyakhov
- Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow 119991, Russia
| | - A V Kobelev
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya 3, Pushchino, Moscow Region 142290, Russia
| | - N V Penkov
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya 3, Pushchino, Moscow Region 142290, Russia
| | - S V Ugraitskaya
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya 3, Pushchino, Moscow Region 142290, Russia
| | - E E Fesenko
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya 3, Pushchino, Moscow Region 142290, Russia
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9
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Qian S, Chen JJJ. Polarized light-based scheme to correlate Mueller matrix elements and casein foam properties. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shaoyu Qian
- Department of Chemical and Materials Engineering; The University of Auckland; Auckland 1010 New Zealand
| | - John J. J. Chen
- Department of Chemical and Materials Engineering; The University of Auckland; Auckland 1010 New Zealand
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10
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Bunkin NF, Shkirin AV, Suyazov NV, Babenko VA, Sychev AA, Penkov NV, Belosludtsev KN, Gudkov SV. Formation and Dynamics of Ion-Stabilized Gas Nanobubble Phase in the Bulk of Aqueous NaCl Solutions. J Phys Chem B 2016; 120:1291-303. [PMID: 26849451 DOI: 10.1021/acs.jpcb.5b11103] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ion-stabilized gas nanobubbles (the so-termed "bubstons") and their clusters are investigated in bulk aqueous solutions of NaCl at different ion concentrations by four independent laser diagnostic methods. It turned out that in the range of NaCl concentration 10(-6) < C < 1 M the radius of bubston remains virtually unchanged at a value of 100 nm. Bubstons and their clusters are a thermodynamically nonequilibrium phase, which has been demonstrated in experiments with magnetic stirrer at different stirring rates. Different regimes of the bubston generation, resulting from various techniques of processing the liquid samples, were explored.
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Affiliation(s)
- Nikolai F Bunkin
- Bauman Moscow State Technical University , second Baumanskaya 5, Moscow, 105005 Russia.,A.M. Prokhorov General Physics Institute, Russian Academy of Sciences , Moscow, ul. Vavilova 38, 119991 Russia
| | - Alexey V Shkirin
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences , Moscow, ul. Vavilova 38, 119991 Russia.,National Research Nuclear University MEPhI , Kashirskoe sh. 31, Moscow, 115409 Russia
| | - Nikolay V Suyazov
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences , Moscow, ul. Vavilova 38, 119991 Russia
| | - Vladimir A Babenko
- P. N. Lebedev Physical Institute, Russian Academy of Sciences , Leninskiy prospekt 53, Moscow, 119991 Russia
| | - Andrey A Sychev
- Bauman Moscow State Technical University , second Baumanskaya 5, Moscow, 105005 Russia.,P. N. Lebedev Physical Institute, Russian Academy of Sciences , Leninskiy prospekt 53, Moscow, 119991 Russia
| | - Nikita V Penkov
- Institute of Cell Biophysics, Russian Academy of Sciences , Institutskaya ul. 3, Pushchino, Moscow region, 142290 Russia
| | - Konstantin N Belosludtsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences , Institutskaya ul. 3, Pushchino, Moscow region, 142290 Russia
| | - Sergey V Gudkov
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences , Moscow, ul. Vavilova 38, 119991 Russia.,Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences , Institutskaya ul. 3, Pushchino, Moscow region, 142290 Russia.,Lobachevsky State University of Nizhni Novgorod , pr. Gagarina 23, Nizhni Novgorod, 603950 Russia
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11
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Bruskov VI, Yaguzhinsky LS, Masalimov ZK, Chernikov AV, Emelyanenko VI, Gudkov SV. The continuous generation of hydrogen peroxide in water containing very low concentrations of unsymmetrical dimethylhydrazine. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915040065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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12
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Okamoto R, Onuki A. Bubble formation in water with addition of a hydrophobic solute. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2015; 38:72. [PMID: 26142694 DOI: 10.1140/epje/i2015-15072-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/20/2015] [Accepted: 05/27/2015] [Indexed: 06/04/2023]
Abstract
We show that phase separation can occur in a one-component liquid outside its coexistence curve (CX) with addition of a small amount of a solute. The solute concentration at the transition decreases with increasing the difference of the solvation chemical potential between liquid and gas. As a typical bubble-forming solute, we consider O2 in ambient liquid water, which exhibits mild hydrophobicity and its critical temperature is lower than that of water. Such a solute can be expelled from the liquid to form gaseous domains while the surrounding liquid pressure is higher than the saturated vapor pressure p cx. This solute-induced bubble formation is a first-order transition in bulk and on a partially dried wall, while a gas film grows continuously on a completely dried wall. We set up a bubble free energy ΔG for bulk and surface bubbles with a small volume fraction ϕ. It becomes a function of the bubble radius R under the Laplace pressure balance. Then, for sufficiently large solute densities above a threshold, ΔG exhibits a local maximum at a critical radius and a minimum at an equilibrium radius. We also examine solute-induced nucleation taking place outside CX, where bubbles larger than the critical radius grow until attainment of equilibrium.
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Affiliation(s)
- Ryuichi Okamoto
- Department of Chemistry, Tokyo Metropolitan University, 192-0397, Hachioji, Tokyo, Japan,
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13
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Zabolotny MA, Barabash YM, Kulish NP, Dmitrenko OP, Kuzmenko MO. Conformational states of NADH molecules in a hydrated shell under weak electromagnetic irradiation. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915010261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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14
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Gudkov SV, Ivanov VE, Karp OE, Chernikov AV, Belosludtsev KN, Bobylev AG, Astashev ME, Gapeyev AB, Bruskov VI. Impact of biologically relevant anions on reactive oxygen species formation in water under the action of non-ionizing physical agents. Biophysics (Nagoya-shi) 2014. [DOI: 10.1134/s000635091405008x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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15
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16
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18
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Bunkin NF, Kozlov VA, Ignatiev PS, Suyazov NV, Shkirin AV, Atakhodzhaev IA. Refraction coefficient of water and aqueous solutions in the optical frequency range in the vicinity of Nafion. Biophysics (Nagoya-shi) 2013. [DOI: 10.1134/s0006350912060048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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19
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Bunkin NF, Yurchenko SO, Suyazov NV, Shkirin AV. Structure of the nanobubble clusters of dissolved air in liquid media. J Biol Phys 2013. [PMID: 23277675 DOI: 10.1007/s10867‐011‐9242‐8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022] Open
Abstract
A qualitative model of the nucleation of stable bubbles in water at room temperature is suggested. This model is completely based on the property of the affinity of water at the nanometer scale; it is shown that under certain conditions the extent of disorder in a liquid starts growing, which results in a spontaneous decrease of the local density of the liquid and in the formation of nanometer-sized voids. These voids can serve as nuclei for the following generation of the so-called bubstons (the abbreviation for bubbles, stabilized by ions). The model of charging the bubstons by the ions, which are capable of adsorption, and the screening by a cloud of counter-ions, which are incapable of adsorption, is analyzed. It was shown that, subject to the charge of bubston, two regimes of such screening can be realized. At low charge of bubston the screening is described in the framework of the known linearized Debye-Huckel approach, when the sign of the counter-ion cloud preserves its sign everywhere in the liquid surrounding the bubston, whereas at large charge this sign is changed at some distance from the bubston surface. This effect provides the mechanism of the emergence of two types of compound particles having the opposite polarity, which leads to the aggregation of such compound particles by a ballistic kinetics.
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Affiliation(s)
- Nikolai F Bunkin
- A.M.Prokhorov General Physics Institute of Russian Academy of Sciences, Vavilova str. 38, Moscow, 119991 Russia
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20
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Bunkin NF, Shkirin AV, Ignatiev PS, Chaikov LL, Burkhanov IS, Starosvetskij AV. Nanobubble clusters of dissolved gas in aqueous solutions of electrolyte. I. Experimental proof. J Chem Phys 2012; 137:054706. [PMID: 22894370 DOI: 10.1063/1.4739528] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Results of experiments with dynamic light scattering, phase microscopy, and polarimetric scatterometry allow us to claim that long-living gas nanobubbles and the clusters composed of such nanobubbles are generated spontaneously in an aqueous solution of salt, saturated with dissolved gas (say, atmospheric air). The characteristic sizes of both nanobubbles and their clusters are found by solving the inverse problem of optical wave scattering in ionic solutions. These experimental results develop our earlier study reported by Bunkin et al. [J. Chem. Phys. 130, 134308 (2009)] and can be treated as evidence for the special role of ions in the generation and stabilization of gas nanobubbles.
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Affiliation(s)
- N F Bunkin
- A. M. Prokhorov General Physics Institute, Vavilova 38, Moscow 119991, Russia.
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21
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Duval E, Adichtchev S, Sirotkin S, Mermet A. Long-lived submicrometric bubbles in very diluted alkali halide water solutions. Phys Chem Chem Phys 2012; 14:4125-32. [DOI: 10.1039/c2cp22858k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Bunkin NF, Yurchenko SO, Suyazov NV, Shkirin AV. Structure of the nanobubble clusters of dissolved air in liquid media. J Biol Phys 2012; 38:121-52. [PMID: 23277675 PMCID: PMC3285720 DOI: 10.1007/s10867-011-9242-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 09/27/2011] [Indexed: 11/26/2022] Open
Abstract
A qualitative model of the nucleation of stable bubbles in water at room temperature is suggested. This model is completely based on the property of the affinity of water at the nanometer scale; it is shown that under certain conditions the extent of disorder in a liquid starts growing, which results in a spontaneous decrease of the local density of the liquid and in the formation of nanometer-sized voids. These voids can serve as nuclei for the following generation of the so-called bubstons (the abbreviation for bubbles, stabilized by ions). The model of charging the bubstons by the ions, which are capable of adsorption, and the screening by a cloud of counter-ions, which are incapable of adsorption, is analyzed. It was shown that, subject to the charge of bubston, two regimes of such screening can be realized. At low charge of bubston the screening is described in the framework of the known linearized Debye-Huckel approach, when the sign of the counter-ion cloud preserves its sign everywhere in the liquid surrounding the bubston, whereas at large charge this sign is changed at some distance from the bubston surface. This effect provides the mechanism of the emergence of two types of compound particles having the opposite polarity, which leads to the aggregation of such compound particles by a ballistic kinetics.
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Affiliation(s)
- Nikolai F. Bunkin
- A.M.Prokhorov General Physics Institute of Russian Academy of Sciences, Vavilova str. 38, Moscow, 119991 Russia
| | - Stanislav O. Yurchenko
- Bauman Moscow State Technical University, 2-nd Baumanskaya str. 5, Moscow, 105005 Russia
| | - Nikolai V. Suyazov
- A.M.Prokhorov General Physics Institute of Russian Academy of Sciences, Vavilova str. 38, Moscow, 119991 Russia
| | - Alexey V. Shkirin
- A.M.Prokhorov General Physics Institute of Russian Academy of Sciences, Vavilova str. 38, Moscow, 119991 Russia
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23
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Gudkov SV, Bruskov VI, Astashev ME, Chernikov AV, Yaguzhinsky LS, Zakharov SD. Oxygen-Dependent Auto-Oscillations of Water Luminescence Triggered by the 1264 nm Radiation. J Phys Chem B 2011; 115:7693-8. [DOI: 10.1021/jp2023154] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergey V. Gudkov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290 Russia
- Pushchino State University, Pushchino, Moscow Region, 142290 Russia
| | - Vadim I. Bruskov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290 Russia
- Pushchino State University, Pushchino, Moscow Region, 142290 Russia
| | - Maksim E. Astashev
- Pushchino State University, Pushchino, Moscow Region, 142290 Russia
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290 Russia
| | - Anatoly V. Chernikov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290 Russia
| | - Lev S. Yaguzhinsky
- Lomonosov Moscow State University, Vorob’evy Gory, Moscow, 119899 Russia
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24
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Bunkin NF, Ninham BW, Ignatiev PS, Kozlov VA, Shkirin AV, Starosvetskij AV. Long-living nanobubbles of dissolved gas in aqueous solutions of salts and erythrocyte suspensions. JOURNAL OF BIOPHOTONICS 2011; 4:150-164. [PMID: 21287687 DOI: 10.1002/jbio.201000093] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 10/25/2010] [Accepted: 10/27/2010] [Indexed: 05/30/2023]
Abstract
Results of experiments combining laser modulation interference microscopy and Mueller matrix scatterometry show that macroscopic scatterers of light are present in liquids free of external solid impurities. Experimental data on distilled water and aqueous NaCl solutions of various concentrations as well as physiological saline solution are reported. The experimental data can be interpreted by using a model of micron-scale clusters composed of polydisperse air nanobubbles having effective radii of 70-100 nm. Their concentration increases with the growth of ionic content. We hypothesize that under certain conditions those clusters of nanobubbles can affect the erythrocyte structure.
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Affiliation(s)
- Nikolai F Bunkin
- AM Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, Russia.
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25
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Bunkin NF, Ninham BW, Babenko VA, Suyazov NV, Sychev AA. Role of dissolved gas in optical breakdown of water: differences between effects due to helium and other gases. J Phys Chem B 2010; 114:7743-52. [PMID: 20496876 DOI: 10.1021/jp101657f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It is shown that water contains defects in the form of heterogeneous optical breakdown centers. Long-living complexes composed of gas and liquid molecules may serve as nuclei for such centers. A new technique for removing dissolved gas from water is developed. It is based on a "helium washing" routine. The structure of helium-washed water is very different from that of water containing dissolved atmospheric gas. It is able to withstand higher optical intensities and temperatures of superheating compared with the nonprocessed ones. The characteristics of plasma spark and values of the breakdown thresholds for processed and nonprocessed samples are given.
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Affiliation(s)
- N F Bunkin
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova, 38, 119991, Moscow, Russia.
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