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Showing 1 to 18 of 18 for “"Porous Glass"”.
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Fabrication and characterization of sintered porous glass emitters for electrospray propulsion
… wafer to produce molds. Soda-lime glass microspheres with a median diameter of about 4[mu]m are then deposited into these molds and sintered to form porous columns with a diameter of 25[mu]mt, 50[mu]rm, or 75[mu]m. These columns become emitters when the device layer is etched with …
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Characterization of a multimode propellant operating in a porous glass electrospray thruster
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Processes for the Fabrication of SU-8 Structures and Sputtered Materials on Porous Glass for Electrospray Thruster Manufacturing
… micron-scale cone-shaped emitters made from porous materials to generate ion emission through passive propellant feeding, but the current design has flaws that affect its lifetime, reliability, and performance. High specific impulse thruster firing occurs when operating in the purely ionic …
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An experimental and analytical investigation of liquid moisture distribution in roof insulating systems
… to detect moisture concentrations in a highly porous glass fiber insulation. A new technique employing thermistor probes was used to measure thermal conductivity over a range of low moisture contents. The results indicate that the material's thermal conductivity is a strong nonlinear function …
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ΚΑΘΑΡΙΣΜΟΣ ΚΑΙ ΜΕΛΕΤΗ ΙΔΙΟΤΗΤΩΝ ΜΙΑΣ Β-ΓΛΥΚΟΣΙΔΑΣΗΣ ΚΑΙ ΜΙΑΣ Β-ΓΑΛΑΚΤΟΣΙΔΑΣΗΣ ΑΠΟ ΣΠΕΡΜΑΤΑ ΚΡΙΘΑΡΙΟΥ. ΕΦΑΡΜΟΓΗ ΤΩΝ ΕΝΖΥΜΩΝ ΣΤΗΝ ΥΔΡΟΛΥΣΗ ...
… ON SEPHAROSE, ON RESIN (DUOLITE) AND ON POROUS GLASS BEADS WITH SIGNIFICANT CONSERVATION OF ITS ACTIVITY. THE SEPHAROSE IMMOBILIZED ENZYME ACQUIRED INCREASED THERMOSTABILITY.
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Investigation of Novel Microseparation Techniques
… Results from a careful comparison of small porous and nonporous particles show that when the particle size is small enough (< 2 µm), both porous and nonporous particles give excellent performance, and the differences in column efficiencies between porous and nonporous particles become …
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Fabrication and Characterization of a Porous Clad Optical Fiber Gas Sensor
… produces a fiber that has a solid core with a porous cladding. The porous cladding region is made from a spinodally phase separable glass where the secondary phase is removed through dilute acid leaching. A non-phase separable glass composition is used for the core region. The properties of the …
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Supported aqueous phase catalysis
… The support chosen is CPG-240, a porous glass with a narrow pore volume distribution. The catalytic species, HRh(CO)[m-P(PhSO₃Na)₃]₃ was synthesized from Rh(CO)₂(acac) by a new synthetic route and the complex was characterized by ³¹P solution NMR, ¹H solid-state NMR, and FTIR. …
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Development of a sulfate reducing packed bed bioreactor for use in a sustainable hydrogen production process
… performance. Diatomaceous earth (DE) pellets, porous glass beads, polyurethane foam, and bone char were evaluated as potential carrier materials for SRB immobilization. The DE pellets immobilized the most biomass, were well suited for use at the industrial scale, and were thus employed in all …
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Modification of soybean proteins by immobilized proteases
… were immobilized on nylon pellets or porous glass by covalent methods to change molecular properties and functional characteristics of soybean proteins. The amount of trypsin immobilized on nylon pellets using the glutaraldehyde method was high when the pellets were treated with …
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THE DETERMINATION OF STABILITY CONSTANTS AND COMPLEXING CAPACITIES OF NATURAL ORGANIC MATTER FOR COPPER (2+), COBALT (2+) AND MANGANESE (2+) BY FLUORESCENCE QUENCHING TITRATION
… chelating agents immobilized on porous glass beads are compared to Chelex 100. In the presence of humic materials, modeled with isolated soil-derived fulvic acid (SFA), the removal of metal ions with Chelex is significantly hindered while the stronger immobilized chelates still …
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Chemical sensors based on swelling polymer microspheres and uncrosslinked fluorescently-labelled molecularly imprinted polymers
… by suspension polymerization using the Shirazu porous glass (SPG) method. The particles were lightly crosslinked with divinylbenzene followed by amination with NNN'-trimethylethylenediamine.</p><p>Poly (hydroxyethylmethacrylate)(polyHEMA) microspheres were prepared by dispersion polymerization …
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Magnetic and structural properties of thin films and nanoparticles studied by scattering methods
… behavior, was investigated in MnO embedded in a porous glass. We studied the magnetic order and phase transition of MnO nanoparticles by polarized neutron scattering. The nanopores filled with MnO are wormlike structures with a typical diameter of 7nm. From the temperature dependence of the …
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Transport and sorption phenomena in concrete and other porous media
… of first and second layer molecules on porous glass are investigated. <br> P:1, Diffusion of a mixture of positively and negatively charged ions in water is studied. An electrical potential is included in the model, which makes it possible to study diffusion caused by internal electrical …
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Electrokinetics in the Earth
… potential experiments were conducted on one glass capillary, two porous glass filters, and one rock. The sample pore diameters ranged from 34 micrometers to 1 millimeter. Without these experiments, the validity of modeling of the frequency dependence of the seismoelectric effect using …
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Increased Functionality Porous Optical Fiber Structures
… surrounding a hollow core, combined with a nanoporous glass creating a unique fully three dimensional pore/fiber configuration. The objective of this study is to increase the functionality of these stochastic ordered hole fibers, as well as porous clad fibers, by integrating electronic device …
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Comparison of non-reactive solute transport models for the evaluation of fluid flow in leaching beds
… characteristics were selected for this study: glass beads (GB - spherical and non-porous), glass shards (GS - irregularly shaped and non-porous), greywacke (GW - irregularly shaped, porous, and highly wettable) and malachite ore (MO - irregularly shaped, highly porous, low wettability and …