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Artykuły w czasopismach na temat „Single electron bubble”

Autor: Grafiati

Data publikacji: 6 września 2023

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1

Bernstein, Lawrence S., and Mitchell R. Zakin. "Confined Electron Model for Single-Bubble Sonoluminescence." Journal of Physical Chemistry 99, no. 40 (1995): 14619–27. http://dx.doi.org/10.1021/j100040a008.

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Kurata, Nobuhiko, and Takahide Oya. "Design of “bubble-inspired single-electron circuit” mimicking behavior of bubble film." Nonlinear Theory and Its Applications, IEICE 10, no. 4 (2019): 399–413. http://dx.doi.org/10.1587/nolta.10.399.

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Gareev B. M. and Sharipov G. L. "Atomic luminescence of Ag during single-bubble sonolysis of silver nanoparticles aqueous suspension." Technical Physics Letters 48, no. 14 (2022): 59. http://dx.doi.org/10.21883/tpl.2022.14.55120.18917.

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For the first time, luminescence of Ag atoms was recorded during moving single-bubble sonolysis of silver nanoparticles aqueous colloidal suspension. This glow is caused by the entry of nanoparticles into a bubble deformable during motion and their decomposition to atoms with collisional excitation in the nonequilibrium plasma of the bubble. Nanoparticles were obtained by multibubble sonolysis of an AgNO3 solution with the addition of honey. This method was used to synthesize a stable suspension of Ag nanoparticles with an average size of ~ 10 nm. By comparing the experimental spectrum of this

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Heller, R., R. Jacob, D. Schönberner, and M. Steffen. "Hot bubbles of planetary nebulae with hydrogen-deficient winds." Astronomy & Astrophysics 620 (December 2018): A98. http://dx.doi.org/10.1051/0004-6361/201832683.

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Context. The first high-resolution X-ray spectroscopy of a planetary nebula, BD +30° 3639, opened the possibility to study plasma conditions and chemical compositions of X-ray emitting “hot” bubbles of planetary nebulae in much greater detail than before. Aims. We investigate (i) how diagnostic line ratios are influenced by the bubble’s thermal structure and chemical profile, (ii) whether the chemical composition inside the bubble of BD +30° 3639 is consistent with the hydrogen-poor composition of the stellar photosphere and wind, and (iii) whether hydrogen-rich nebular matter has already been

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5

GAREEV, B. M., A. M. ABDRAKHMANOV, and G. L. SHARIPOV. "SONOLUMINESCENCE SPECTROSCOPY OF COLLOIDAL SUSPENSIONS: MOLECULAR, IONIC AND ATOMIC LUMINESCENCE DURING SONOCHEMICAL DECOMPOSITION OF SILICON DIOXIDE NANOPARTICLES CONTAINING RUTHENIUM AND COPPER COMPOUNDS." Izvestia Ufimskogo Nauchnogo Tsentra RAN, no. 4 (December 13, 2021): 16–21. http://dx.doi.org/10.31040/2222-8349-2021-0-4-16-21.

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The article is devoted to an example of the sonoluminescence spectroscopy use, which was previously known as a method for analyzing substances from the characteristic spectra of their sonoluminescence only in true solutions, for carrying out a similar analysis of substances contained in insoluble nanoparticles in colloidal suspensions. The solutions sonolysis, that is, their irradiation with ultrasound, is accompanied by the formation of cavitation bubbles that vibrate radially at the frequency of the ultrasonic field. Volatile components of the solution enter the bubbles, evaporating from the

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Zhang, Feifei, Lynn Boatner, Yanwen Zhang, Di Chen, Yongqiang Wang, and Lumin Wang. "Swelling and Helium Bubble Morphology in a Cryogenically Treated FeCrNi Alloy with Martensitic Transformation and Reversion after Helium Implantation." Materials 12, no. 17 (2019): 2821. http://dx.doi.org/10.3390/ma12172821.

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A cryo-quenched 70 wt % Fe-15 wt% Cr-15 wt% Ni single-crystal alloy with fcc (face centered cubic), bcc (body centered cubic), and hcp (hexagonal close packed) phases was implanted with 200 keV He+ ions up to 2 × 1017 ions·cm−2 at 773 K. Surface-relief features were observed subsequent to the He+ ion implantation, and transmission electron microscopy was used to characterize both the surface relief properties and the details of associated “swelling effects” arising cumulatively from the austenitic-to-martensitic phase transformation and helium ion-induced bubble evolution in the single-crystal

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SHARIPOV, G. L., B. M. GAREEV, A. M. ABDRAKHMANOV, and L. R. YAKSHEMBETOVA. "ACTIVATION OF SINGLE-BUBBLE SONOLUMINESCENCE AND RADIOLUMINESCENCE OF GD3+ AND DY3+ IONS BY ELECTRON ACCEPTORS IN AQUEOUS SOLUTIONS AS CONSEQUENCE OF THE HYDRATED ELECTRON GENERATION DURING WATER SONOLYSIS AND RADIOLYSIS." Izvestia Ufimskogo Nauchnogo Tsentra RAN, no. 4 (December 13, 2021): 22–29. http://dx.doi.org/10.31040/2222-8349-2021-0-4-22-29.

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Discovered the activation of moving single-bubble sonoluminescence and radioluminescence for Gd3+ and Dy3+ ions in aqueous solutions of GdCl3 and DyCl3 by the acceptor of a hydrated electron (eaq-): H+, Cd2+, etc. This activation is similar to the previously found activation by acceptors of eaq- radioluminescence and single-bubble sonoluminescence for the Tb3+ ion. Electron acceptors do not affect the quantum yield of the said lantha-nide ions photoluminescence. They also do not affect the yield of their multibubble sonoluminescence in aqueous solutions, since eaqdoes not appear in significant

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Memoli, Gianluca, Kate Baxter, Helen Jones, Ken Mingard, and Bajram Zeqiri. "Acoustofluidic Measurements on Polymer-Coated Microbubbles: Primary and Secondary Bjerknes Forces." Micromachines 9, no. 8 (2018): 404. http://dx.doi.org/10.3390/mi9080404.

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The acoustically-driven dynamics of isolated particle-like objects in microfluidic environments is a well-characterised phenomenon, which has been the subject of many studies. Conversely, very few acoustofluidic researchers looked at coated microbubbles, despite their widespread use in diagnostic imaging and the need for a precise characterisation of their acoustically-driven behaviour, underpinning therapeutic applications. The main reason is that microbubbles behave differently, due to their larger compressibility, exhibiting much stronger interactions with the unperturbed acoustic field (pr

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9

GLINEC, Y., J. FAURE, A. PUKHOV, et al. "Generation of quasi-monoenergetic electron beams using ultrashort and ultraintense laser pulses." Laser and Particle Beams 23, no. 2 (2005): 161–66. http://dx.doi.org/10.1017/s0263034605050275.

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Plasma-based accelerators have been proposed for the next generation of compact accelerators because of the huge electric fields they can support. However, it has been difficult to use them efficiently for applications because they produce poor quality particle beams with large energy spreads. Here, we demonstrate a dramatic enhancement in the quality of electron beams produced in laser-plasma interaction: an ultrashort laser pulse drives a plasma bubble which traps and accelerates plasma electrons to a single energy. This produces an extremely collimated and quasi-monoenergetic electron beam

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10

Гареев, Б. М., та Г. Л. Шарипов. "Атомарная люминесценция Ag при однопузырьковом сонолизе водной суспензии наночастиц серебра". Письма в журнал технической физики 47, № 22 (2021): 17. http://dx.doi.org/10.21883/pjtf.2021.22.51720.18917.

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For the first time, luminescence of Ag atoms was recorded during moving single-bubble sonolysis of silver nanoparticles aqueous colloidal suspension. This glow is caused by the entry of nanoparticles into a bubble deformable during motion and their decomposition to atoms with collisional excitation in the nonequilibrium plasma of the bubble. Nanoparticles were obtained by multibubble sonolysis of an AgNO3 solution with the addition of honey. This method was used to synthesize a stable suspension of Ag nanoparticles with an average size of ~ 10 nm. By comparing the experimental spectrum of this

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11

Li, Jun, Rui Yan, Bin Zhao, Jian Zheng, Huasen Zhang, and Xiyun Lu. "Mitigation of the ablative Rayleigh–Taylor instability by nonlocal electron heat transport." Matter and Radiation at Extremes 7, no. 5 (2022): 055902. http://dx.doi.org/10.1063/5.0088058.

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The effects of electron nonlocal heat transport (NLHT) on the two-dimensional single-mode ablative Rayleigh–Taylor instability (ARTI) up to the highly nonlinear phase are reported for the first time through numerical simulations with a multigroup diffusion model. It is found that as well as its role in the linear stabilization of ARTI growth, NLHT can also mitigate ARTI bubble nonlinear growth after the first saturation to the classical terminal velocity, compared with what is predicted by the local Spitzer–Härm model. The key factor affecting the reduction in the linear growth rate is the enh

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12

Hayami, Satoru. "Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets." New Journal of Physics 23, no. 11 (2021): 113032. http://dx.doi.org/10.1088/1367-2630/ac3683.

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Abstract Interplay between itinerant electrons and localized spins in itinerant magnets gives rise to a variety of noncoplanar multiple-Q spin textures, such as the skyrmion, hedgehog, meron, and vortex. We elucidate that another type of multiple-Q state consisting of collinear sinusoidal waves, a magnetic bubble crystal, appears at finite temperatures in a centrosymmetric itinerant electron system. The results are obtained for the classical Kondo lattice model with easy-axis single-ion anisotropy on a triangular lattice by a large-scale numerical simulation. We find that a finite-temperature

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13

Гареев, Б. М., А. М. Абдрахманов та Г. Л. Шарипов. "Атомарная однопузырьковая сонолюминесценция иттербия в коллоидной суспензии". Письма в журнал технической физики 48, № 16 (2022): 18. http://dx.doi.org/10.21883/pjtf.2022.16.53201.19269.

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For the first time, atomic single-bubble sonoluminescence of Yb in a colloidal suspension in dodecane of SiO2 nanoparticles containing YbCl3 was recorded. A spectrum was obtained containing Yb, Yb+ lines in the region of 300-550 nm, together with SiO lines, due to the entry of nanoparticles into the bubble during sonolysis of the suspension. The lower limit of determination of ytterbium in the initial aqueous solution of YbCl3 used for depositing onto nanoparticles, according to the intensity of the analytical line at 399 nm in this spectrum, is 3∙10–3 mol/l. By comparing the experimental and

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14

Graber, M., B. Lane, R. Lamia, and E. Pastoriza-Munoz. "Bubble cells: renal tubular cells in the urinary sediment with characteristics of viability." Journal of the American Society of Nephrology 1, no. 7 (1991): 999–1004. http://dx.doi.org/10.1681/asn.v17999.

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The urinary sediment was examined by light microscopy in 65 consecutive inpatients with renal insufficiency (not due to pre- or postrenal factors) referred to a nephrology consult service for evaluation. In the 60 patients in whom a single diagnosis was reached, the sediments of 34 (57%) contained an easily recognized cell, which we have called the "bubble cell". These cells were bizarre, large cells with a single nucleus, which appeared to contain one or more fluid-filled vesicles. Bubble cells were most prevalent in the sediment of patients with acute tubular necrosis but were also seen a va

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15

Burinskii, Alexander. "Source of the Kerr-Newman solution as a gravitating bag model: 50 years of the problem of the source of the Kerr solution." International Journal of Modern Physics A 31, no. 02n03 (2016): 1641002. http://dx.doi.org/10.1142/s0217751x16410025.

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It is known that gravitational and electromagnetic fields of an electron are described by the ultra-extreme Kerr-Newman (KN) black hole solution with extremely high spin/mass ratio. This solution is singular and has a topological defect, the Kerr singular ring, which may be regularized by introducing the solitonic source based on the Higgs mechanism of symmetry breaking. The source represents a domain wall bubble interpolating between the flat region inside the bubble and external KN solution. It was shown recently that the source represents a supersymmetric bag model, and its structure is una

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16

Toyota, Hiromichi, Ken Nagaoka, Xia Zhu, et al. "Synthesis of Single-Wall Carbon Nanotubes by In-Liquid CVD." Key Engineering Materials 749 (August 2017): 217–22. http://dx.doi.org/10.4028/www.scientific.net/kem.749.217.

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High-speed synthesis of the carbon nanotubes in liquid is introduced. The conventional method for synthesizing carbon nanotubes is generally known as gas-phase chemical-vapor deposition (CVD). With that method, carbon nanotubes of high purity can be synthesized, but the synthesis rate is low. Even though the synthesized carbon nanotubes are excellent materials, they cannot be used in large quantities. Accordingly, in this study, single-wall carbon nanotubes (SWCNTs) are synthesized by “in-liquid” CVD. Since the molecular density of a liquid is much higher than that of a gas and the liquid has

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Wisniewski, M., A. Sionkowska, H. Kaczmarek, J. Skopinska, S. Lazare, and V. Tokarev. "The influence of KrF excimer laser irradiation on the surface of collagen and collagen/PVP films." International Journal of Photoenergy 2006 (2006): 1–7. http://dx.doi.org/10.1155/ijp/2006/35126.

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The surface properties of collagen and collagen/poly(vinyl pyrrolidone) (PVP) films after KrF excimer laser irradiation (λ=248nm) were investigated by means of the technique of scanning electron microscopy (SEM) and optical microscopy (OM). The laser irradiation of the used specimens caused an expansion of materials above their surface with pronounced sings of its melting. The height of the ablated volume in a case of collagen film at a fluence of1.1J/cm2was approximately 5μm. A white damage appears on the treated surfaces at a threshold of0.5J/cm2with a single pulse and becomes more visible f

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Kabakci, Gamze Cakir, Ozgur Aslan, and Emin Bayraktar. "Toughening Mechanism Analysis of Recycled Rubber-Based Composites Reinforced with Glass Bubbles, Glass Fibers and Alumina Fibers." Polymers 13, no. 23 (2021): 4215. http://dx.doi.org/10.3390/polym13234215.

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Recycling of materials attracts considerable attention around the world due to environmental and economic concerns. Recycled rubber is one of the most commonly used recyclable materials in a number of industries, including automotive and aeronautic because of their low weight and cost efficiency. In this research, devulcanized recycled rubber-based composites are designed with glass bubble microsphere, short glass fiber, aluminum chip and fine gamma alumina fiber (γ-Al2O3) reinforcements. After the determination of the reinforcements with matrix, bending strength and fracture characteristics o

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Zhang, Xiaoxi, Can Cao, Nan Gui, et al. "A Particle-Scale Model of Surface Tension for Two-Phase Flow: Model Description and Validation." Energies 15, no. 19 (2022): 7132. http://dx.doi.org/10.3390/en15197132.

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A particle-scale surface tension force model (STF) is proposed here to be incorporated in the smoothed hydrodynamics particle (SPH) method. This model is based on the identification of interface geometry and the gradient of densities across the interface. A square bubble of single-phase and a square bubble immersed in fluids are simulated by the STF model accompanied with a combined kernel in SPH to validate their suitability to simulate the immersed bubble motion. Two cases of rising bubbles, i.e., a single rising bubble and a pair of rising bubbles, are simulated for demonstration. The risin

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Buckley, C. E., H. K. Birnbaum, J. S. Lin, et al. "Characterization of H defects in the aluminium–hydrogen system using small-angle scattering techniques." Journal of Applied Crystallography 34, no. 2 (2001): 119–29. http://dx.doi.org/10.1107/s0021889800018239.

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Aluminium foils (99.99% purity) and single crystals (99.999% purity) were charged with hydrogen using a gas plasma method and electrochemical methods, resulting in the introduction of a large amount of hydrogen. X-ray diffraction measurements indicated that within experimental error there was a zero change in lattice parameter after plasma charging. This result is contradictory to almost all other face-centred cubic (f.c.c.) materials, which exhibit a lattice expansion when the hydrogen enters the lattice interstitially. It is hypothesized that the hydrogen does not enter the lattice as an int

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Lai, S. C. N., F. R. Tay, G. S. P. Cheung, et al. "Reversal of Compromised Bonding in Bleached Enamel." Journal of Dental Research 81, no. 7 (2002): 477–81. http://dx.doi.org/10.1177/154405910208100709.

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Oxygen inhibits polymerization of resin-based materials. We hypothesized that compromised bonding to bleached enamel can be reversed with sodium ascorbate, an anti-oxidant. Sandblasted human enamel specimens were treated with distilled water (control) and 10% carbamide peroxide gel with or without further treatment with 10% sodium ascorbate. They were bonded with Single Bond (3M-ESPE) or Prime&Bond NT (Dentsply DeTrey) and restored with a composite. Specimens were prepared for microtensile bond testing and transmission electron microscopy after immersion in ammoniacal silver nitrate for na

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Yu, Qidong, Zhicheng Xu, Jing Zhao, Mindi Zhang, and Xiaojian Ma. "PIV-Based Acoustic Pressure Measurements of a Single Bubble near the Elastic Boundary." Micromachines 11, no. 7 (2020): 637. http://dx.doi.org/10.3390/mi11070637.

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The objective of this paper was to investigate acoustic pressure waves and the transient flow structure emitted from the single bubble near an elastic boundary based on the particle image velocimetry (PIV). A combination of an electric-spark bubble generator and PIV were used to measure the temporal bubble shapes, transient flow structure, as well as the mid-span deflection of an elastic boundary. Results are presented for three different initial positions near an elastic boundary, which were compared with results obtained using a rigid boundary. A formula relating velocity and pressure was pr

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Peng, YuXiang, and Wayne A. Scales. "Satellite Formation Flight Simulation Using Multi-Constellation GNSS and Applications to Ionospheric Remote Sensing." Remote Sensing 11, no. 23 (2019): 2851. http://dx.doi.org/10.3390/rs11232851.

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The Virginia Tech Formation Flying Testbed (VTFFTB) is a global navigation satellite system (GNSS)-based hardware-in-the-loop (HIL) simulation testbed for spacecraft formation flying with ionospheric remote sensing applications. Past applications considered only the Global Positioning System (GPS) constellation. The rapid GNSS modernization offers more signals from other constellations, including the growing European system—Galileo. This study presents an upgrade of VTFFTB with the incorporation of Galileo and the associated enhanced capabilities. By simulating an ionospheric plasma bubble sce

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Wei, Fang, Liu Ling, and Xu Lan. "Preparation and Characterization of CuO/ZnO/PVDF/PAN Nanofiber Composites by Bubble-electrospinning." Recent Patents on Nanotechnology 13, no. 3 (2020): 196–201. http://dx.doi.org/10.2174/1872210513666191007113524.

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Background: Nanocomposites loaded with metal oxides, such as CuO and ZnO, have excellent optical, electrical, mechanical and chemical properties, which result in their great potential applications in optoelectronic devices, sensors, photocatalysts and other fields. Especially, electrospun metal- oxide-loaded nanofibers have attracted much attention in many fields. However, the single-needle Electrospinning (ES) inhibits the industrial application of these electrospun nanofiber composites. Bubble-Electrospinning (BE) is an effective free surface ES for mass production of nanofiber membranes loa

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Wu, Hao, Tianshu Zhang, Xiaochen Lai, et al. "Influence of Surface Tension on Dynamic Characteristics of Single Bubble in Free-Field Exposed to Ultrasound." Micromachines 13, no. 5 (2022): 782. http://dx.doi.org/10.3390/mi13050782.

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The motion of bubbles in an ultrasonic field is a fundamental physical mechanism in most applications of acoustic cavitation. In these applications, surface-active solutes, which could lower the surface tension of the liquid, are always utilized to improve efficiency by reducing the cavitation threshold. This paper examines the influence of liquids’ surface tension on single micro-bubbles motion in an ultrasonic field. A novel experimental system based on high-speed photography has been designed to investigate the temporary evolution of a single bubble in the free-field exposed to a 20.43 kHz

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Wang, Ronghang, Bingxin Liu, Jiahao Gong, et al. "Development of a bubble-based single cell picking system." Journal of Micromechanics and Microengineering 32, no. 3 (2022): 035006. http://dx.doi.org/10.1088/1361-6439/ac4c96.

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Abstract In this work, we proposed a novel method to ‘pick’ single cell from a cluster of cells using bubbles as ‘fingers’. Particularly, the bubble was generated in the cell suspension solution via the pores in a porous membrane sandwiched between the solution channel and the gas channel. Controlling the pressure of the gas and the cell suspension could produce a bubble with certain size in the solution channel, and the bubble could capture a cell in its surface due to the interfacial tension between the cell suspension solution and the bubble, and then transfer the cell away. A simplified me

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Afridi, Jing, and Younas. "Biogas Production and Fundamental Mass Transfer Mechanism in Anaerobic Granular Sludge." Sustainability 11, no. 16 (2019): 4443. http://dx.doi.org/10.3390/su11164443.

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Anaerobic granules are responsible for organic degradation and biogas production in a reactor. The biogas production is entirely dependent on a mass transfer mechanism, but so far, the fundamental understanding remains poor due to the covered surface of the reactor. The study aimed at investigating the fundamental mass transfer characteristics of single anaerobic granules of different sizes using microscopic imaging and analytical monitoring under single and different organic loadings. The experiment was conducted in a micro reactor and mass transfer was calculated using modified Fick’s law. S

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Lemaire, Cédric, Yann Quilichini, Nicole Brunel-Michac, et al. "Plasticity of the xylem vulnerability to embolism in Populus tremula x alba relies on pit quantity properties rather than on pit structure." Tree Physiology 41, no. 8 (2021): 1384–99. http://dx.doi.org/10.1093/treephys/tpab018.

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Abstract Knowledge on variations of drought resistance traits are needed to predict the potential of trees to acclimate to coming severe drought events. Xylem vulnerability to embolism is a key parameter related to such droughts, and its phenotypic variability relies mainly on environmental plasticity. We investigated the structural determinants controlling the plasticity of vulnerability to embolism, focusing on the key elements involved in the air bubble entry in vessels, especially the intervessel pits. Poplar saplings (Populus tremula x alba (Aiton) Sm., 1804) grown in contrasted water ava

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Panton, Ronald L., Jong W. Lee, Lakhi Goenka, and Achyuta Achari. "Simulation of Void Growth in Molten Solder Bumps." Journal of Electronic Packaging 125, no. 3 (2003): 329–34. http://dx.doi.org/10.1115/1.1569954.

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This research studies the motion of void bubbles within molten solder bumps. Surface tension variation on the outer surface of the bump drives a flow that is transmitted to the interior by viscosity. Bubbles inside the bump grow by collisions with other bubbles. A computer model of this process has been formulated. In cases with the melting process from top to bottom, a ring of bubbles collected at the top outer rim of the solder bump. When the melting direction was reversed, the typical result was a single large bubble near the center with a few smaller recirculating bubbles.

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Liu, Yaxin, Eric R. Upchurch, and Evren M. Ozbayoglu. "Experimental Study of Single Taylor Bubble Rising in Stagnant and Downward Flowing Non-Newtonian Fluids in Inclined Pipes." Energies 14, no. 3 (2021): 578. http://dx.doi.org/10.3390/en14030578.

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An experimental investigation of single Taylor bubbles rising in stagnant and downward flowing non-Newtonian fluids was carried out in an 80 ft long inclined pipe (4°, 15°, 30°, 45° from vertical) of 6 in. inner diameter. Water and four concentrations of bentonite–water mixtures were applied as the liquid phase, with Reynolds numbers in the range 118 < Re < 105,227 in countercurrent flow conditions. The velocity and length of Taylor bubbles were determined by differential pressure measurements. The experimental results indicate that for all fluids tested, the bubble velocity increases as

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Frolov, Sergey M., Konstantin A. Avdeev, Viktor S. Aksenov, Illias A. Sadykov, Igor O. Shamshin, and Fedor S. Frolov. "Interaction of Shock Waves with Water Saturated by Nonreacting or Reacting Gas Bubbles." Micromachines 13, no. 9 (2022): 1553. http://dx.doi.org/10.3390/mi13091553.

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A compressible medium represented by pure water saturated by small nonreactive or reactive gas bubbles can be used for generating a propulsive force in large-, medium-, and small-scale thrusters referred to as a pulsed detonation hydroramjet (PDH), which is a novel device for underwater propulsion. The PDH thrust is produced due to the acceleration of bubbly water (BW) in a water guide by periodic shock waves (SWs) and product gas jets generated by pulsed detonations of a fuel–oxidizer mixture. Theoretically, the PDH thrust is proportional to the operation frequency, which depends on both the

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Bello, Valentina, Elisabetta Bodo, and Sabina Merlo. "Optical Multi-Parameter Measuring System for Fluid and Air Bubble Recognition." Sensors 23, no. 15 (2023): 6684. http://dx.doi.org/10.3390/s23156684.

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Detection of air bubbles in fluidic channels plays a fundamental role in all that medical equipment where liquids flow inside patients’ blood vessels or bodies. In this work, we propose a multi-parameter sensing system for simultaneous recognition of the fluid, on the basis of its refractive index and of the air bubble transit. The selected optofluidic platform has been designed and studied to be integrated into automatic pumps for the administration of commercial liquid. The sensor includes a laser beam that crosses twice a plastic cuvette, provided with a back mirror, and a position-sensitiv

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Xu, Zhicheng, Xiaojian Ma, Qidong Yu, et al. "Experimental Investigation of Bubble Migration near Anisotropic Beams." Micromachines 12, no. 12 (2021): 1518. http://dx.doi.org/10.3390/mi12121518.

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In order to resist bubble loading, anisotropic composite materials are the development direction of the future. The objective of this paper was to experimentally investigate the hydrodynamic performance of anisotropic laminate composite plates, with a focus on the effect of its anisotropic characteristics on single bubble migration. In these experiments, the bubble was generated in a transparent water tank filled with sufficiently degassed water by Joule heating at the connecting point of the electrodes through the discharge of a 6600 μF charge to 800 V, and a high-speed camera system with a r

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Han, Zhaofeng, Cyril Mauger, Thibaut Chaise, et al. "Experimental and Analytical Study of under Water Pressure Wave Induced by the Implosion of a Bubble Generated by Focused Laser." Sensors 21, no. 14 (2021): 4800. http://dx.doi.org/10.3390/s21144800.

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In various domains of material processing, such as surface cleaning and surface treatment, cavitation phenomenon may become an alternative to traditional methods if this phenomenon is well understood. Due to experimental and mathematical difficulties in theoretical models, it is still a challenge to accurately measure the physical mechanism of the fluid/structure interactions. In this study, we verified the feasibility of using polyvinylidene fluoride (PVDF) sensors to quantitatively measure the under-water pressure wave generated by the collapse of a single cavitation bubble. The electrical s

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Al-Saud, LMS, and HNA Al-Nahedh. "Occluding Effect of Nd:YAG Laser and Different Dentin Desensitizing Agents on Human Dentinal Tubules In Vitro: A Scanning Electron Microscopy Investigation." Operative Dentistry 37, no. 4 (2012): 340–55. http://dx.doi.org/10.2341/10-188-l.

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SUMMARY Objectives This in vitro study aimed to microscopically evaluate and compare the occluding effect of the Nd:YAG laser and different dentin desensitizing agents on human dentinal tubules. Materials and Methods The Nd:YAG laser (SunLase™ 800) and four commercially available and professionally applied dentin desensitizers (Gluma® desensitizer, Tenure Quick®, Quell™ desensitizer, and VivaSens®) were investigated in this study. Sixty-four extracted intact human molars were used. Each dentin surface was divided by shallow indentation into two halves, one of which was used for treatment and t

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Marks, Roman. "Bubble mediated polymerization of RNA and DNA." AIMS Biophysics 9, no. 2 (2022): 96–107. http://dx.doi.org/10.3934/biophy.2022009.

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<abstract> <p>Research dedicated to trace rotational motion of bubbles in saline water revealed that these may generate either single cationic or cationic/anionic motions, including spliced double helix flow. In all cases, the aggregated ionic flows propagate in spiraling as well as rotational manner. However, if bi-ionic or double helix motion is generated, the flow is oppositely directed and has opposite electric charges. Next, the assembled flow is forced to pirouette within the bubble vortex. During that processing the narrowing of spiraling flow takes place and result in incre

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Wongsaroj, Wongsakorn, Hideharu Takahashi, Natee Thong-Un, and Hiroshige Kikura. "Ultrasonic Measurement for the Experimental Investigation of Velocity Distribution in Vapor-Liquid Boiling Bubbly Flow." International Journal of Engineering and Technology Innovation 12, no. 1 (2021): 16–28. http://dx.doi.org/10.46604/ijeti.2021.8329.

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This study proposes an ultrasonic velocity profiler (UVP) with a single ultrasonic gas-liquid two-phase separation (SUTS) technique to measure the velocity distribution of vapor-liquid boiling bubbly flow. The proposed technique is capable of measuring the velocity of the vapor bubble and liquid separately in boiling conditions. To confirm the viability of the measurement technique, the experiment is conducted on vertical pipe flow apparatus. The ultrasonic transmission and effect of ultrasonic refraction through the pipe wall and water are investigated at ambient temperature until subcooled b

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Balakrishnan, Kaushik, and Suresh Menon. "A multiphase buoyancy-drag model for the study of Rayleigh-Taylor and Richtmyer-Meshkov instabilities in dusty gases." Laser and Particle Beams 29, no. 2 (2011): 201–17. http://dx.doi.org/10.1017/s0263034611000176.

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AbstractA new multiphase buoyancy-drag model is developed for the study of Rayleigh-Taylor and Richtmyer-Meshkov instabilities in dusty gases, extending on a counterpart single-phase model developed in the past by Srebro et al. (2003). This model is applied to single- and multi-mode perturbations in dusty gases and both Rayleigh-Taylor and Richtmyer-Meshkov instabilities are investigated. The amplitude for Rayleigh-Taylor growth is observed to be contained within a band, which lies within limits identified by a multiphase Atwood number that is a function of the fluid densities, particle size,

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Zhu, Junwen, Qiqian Zhang, Fei Liang, Yongxiang Feng, and Wenhui Wang. "High-throughput acoustofluidic microchannels for single cell rotation." Journal of Micromechanics and Microengineering 31, no. 12 (2021): 124004. http://dx.doi.org/10.1088/1361-6439/ac349e.

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Abstract There is a growing desire for cell rotation in the field of biophysics, bioengineering and biomedicine. We herein present novel microfluidic channels for simultaneous high-throughput cell self-rotation using local circular streaming generated by ultrasonic wave excited bubble arrays. The bubble traps achieve high homogeneity of liquid–gas interface by setting capillary valves at the entrances of dead-end bubble trappers orthogonal to the main microchannel. In such a highly uniform bubble array, rotation at different fields of bubble-relevant vortices is considered equal and interconve

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Thoharudin, Thoharudin, Sunardi Sunardi, Fitroh Anugrah Kusuma Yudha, Muhammad Nadjib, and Arif Setyo Nugroho. "Design and Analysis of Venturi Microbubble Generator Using Computational Fluid Dynamics." Eksergi 19, no. 2 (2023): 49. http://dx.doi.org/10.32497/eksergi.v19i2.4305.

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The necessity for dissolved oxygen in water is crucial for the survival and growth of aquatic organisms, particularly tilapia. Seventy-five percent of tilapia will die if there is insufficient dissolved oxygen in the water. This work seeks to develop a venturi bubble-generating technique to combat the scarcity of dissolved oxygen in the water. A floating pump with a capacity of 12 m<sup>3</sup>/hour was selected as the medium for distributing water and generating vacuum pressure to draw in air for mixing with the water flow in the venturi. Ansys Fluent was used to model piping and

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Silvera, I. F., J. Blanchfield, and J. Tempere. "Stability of multielectron bubbles against single-electron split-off." physica status solidi (b) 237, no. 1 (2003): 274–79. http://dx.doi.org/10.1002/pssb.200301792.

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KARTOON, D., D. ORON, L. ARAZI, and D. SHVARTS. "Three-dimensional multimode Rayleigh–Taylor and Richtmyer–Meshkov instabilities at all density ratios." Laser and Particle Beams 21, no. 3 (2003): 327–34. http://dx.doi.org/10.1017/s0263034603213069.

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The three-dimensional (3D) turbulent mixing zone (TMZ) evolution under Rayleigh–Taylor and Richtmyer–Meshkov conditions was studied using two approaches. First, an extensive numerical study was made, investigating the growth of a random 3D perturbation in a wide range of density ratios. Following that, a new 3D statistical model was developed, similar to the previously developed two-dimensional (2D) statistical model, assuming binary interactions between bubbles that are growing at a 3D asymptotic velocity. Confirmation of the theoretical model was gained by detailed comparison of the bubble s

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Tien, Tsung-Mo, Ching-Jer Huang, Chien-Hsun Lee, and Kuan-Wen Liu. "Fiber-Optic Probe Array for Measuring Spatial Distributions of Air Volume Fractions in Bubbly Flows." Sensors 23, no. 3 (2023): 1222. http://dx.doi.org/10.3390/s23031222.

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In this study, we developed a fiber-optic sensing system with an eight-probe array for measuring the spatial distributions of air volume (void) fractions in bubbly flows. Initially, we performed calibration experiments in a cylindrical tank by using a fiber-optic sensing system with a single probe to determine the relationship between the time fraction ratio of bubble signals and void fractions. A high correlation coefficient was obtained between the time fraction ratio and the void fraction, suggesting that the proposed fiber-optic sensing system can measure local void fractions of up to 18%.

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PELESZ, Adam. "Charging of a single soap bubble." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 10 (2018): 178–81. http://dx.doi.org/10.15199/48.2018.10.40.

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Ying, Chongfu, Yu An, and Chongguo Xie. "Bremsstrahlung in single bubble sonoluminescence." Journal of Physics D: Applied Physics 38, no. 14 (2005): 2489–96. http://dx.doi.org/10.1088/0022-3727/38/14/029.

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Osuna, Isaac Aaron Rodriguez, Pablo Cobelli, and Nahuel Olaiz. "Bubble Formation in Pulsed Electric Field Technology May Pose Limitations." Micromachines 13, no. 8 (2022): 1234. http://dx.doi.org/10.3390/mi13081234.

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Currently, increasing amounts of pulsed electric fields (PEF) are employed to improve a person’s life quality. This technology is based on the application of the shortest high voltage electrical pulse, which generates an increment over the cell membrane permeability. When applying these pulses, an unwanted effect is electrolysis, which could alter the treatment. This work focused on the study of the local variations of the electric field and current density around the bubbles formed by the electrolysis of water by PEF technology and how these variations alter the electroporation protocol. The

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M., Adama Maiga. "Particle model of single bubble sonoluminescence." International Journal of Physical Sciences 11, no. 19 (2016): 252–61. http://dx.doi.org/10.5897/ijps2016.4535.

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Dehane, Aissa, and Slimane Merouani. "Microscopic Analysis of Hydrogen Production from Methane Sono-Pyrolysis." Energies 16, no. 1 (2022): 443. http://dx.doi.org/10.3390/en16010443.

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The sonolysis of certain substrates in water has proved its effectiveness for the enhancement of the sonochemical production of hydrogen. In this study, the sonolysis of methane has been investigated for the first time in a single acoustic bubble (microreactor) over a frequency from 140 to 515 kHz. The obtained findings have been compared to those available in the literature. Independently of the methane dose (inside the bubble), the yield of H2 was improved especially with the decrease in wave frequency (from 515 to 140 kHz). For the driving frequencies 140, 213, 355, and 515 kHz, the product

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Wang, Hanxiong, Liping Liu, and Dong Liu. "Equilibrium shapes of a heterogeneous bubble in an electric field: a variational formulation and numerical verifications." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2199 (2017): 20160494. http://dx.doi.org/10.1098/rspa.2016.0494.

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The equilibrium shape of a bubble/droplet in an electric field is important for electrowetting over dielectrics (EWOD), electrohydrodynamic (EHD) enhancement for heat transfer and electro-deformation of a single biological cell among others. In this work, we develop a general variational formulation in account of electro-mechanical couplings. In the context of EHD, we identify the free energy functional and the associated energy minimization problem that determines the equilibrium shape of a bubble in an electric field. Based on this variational formulation, we implement a fixed mesh level-set

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Fu, J. Y., H. S. Zhang, H. B. Cai, P. L. Yao, and S. P. Zhu. "Effect of ablation on the nonlinear spike growth for the single-mode ablative Rayleigh–Taylor instability." Matter and Radiation at Extremes 8, no. 1 (2023): 016901. http://dx.doi.org/10.1063/5.0106832.

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The effect of ablation on the nonlinear spike growth of single-mode ablative Rayleigh–Taylor instability (RTI) is studied by two-dimensional numerical simulations. It is shown that the ablation can reduce the quasi-constant velocity and significantly suppress the reacceleration of the spike in the nonlinear phase. It is also shown that the spike growth can affect the ablation-generated vorticity inside the bubble, which further affects the nonlinear bubble acceleration. The vorticity evolution is found to be correlated with the mixing width (i.e., the sum of the bubble and spike growths) for a

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