Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"ultrasonic treatment"”.
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Fabrication of self-assembled zein nanoparticles via microfluidic chip and ultrasonic treatment
… zein nanoparticles: microfluidic chip and ultrasonic treatment. Microfluidic chips are novel platforms that are used to control the ultra-small volume of fluids going through channels with the dimensions of tens of micrometers. Ultrasound technology has been used in the food industry for …
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Development of nanocrystalline Fe80Cr20 alloy using combination technique of ball milling and ultrasonic treatment for fuel cell interconnector
… high energy ball milling (milled) combined with ultrasonic treatment (UT) in obtaining smaller crystallite size, finer surface morphology, higher thermal stability and more homogenous nanocrystalline Fe80Cr20 alloys. This condition was motivated by the previous research that some of the grain …
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Variables Governing the Initial Stages of the Synergisms of Ultrasonic Treatment of Biochar in Water Saturated with Carbon Dioxide
… stage of the synergistic processes of acoustic treatment of biochar in water saturated with CO2 (AIChE Journal, 2014;60:1054-1065). Treatments with switchgrass and miscanthus biochars have been conducted to examine the effects of acoustic intensity, biochar/H2O ratio, CO2 concentrations of the …
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Ultrasonically Aided Extrusion of Rubber Nanocomposites and Rubber Blends
… and performance characteristics. Application of ultrasonic waves during extrusion is considered a possible means to influence compounding of polymer nanocomposites and polymer blends. The present study is devoted to the ultrasonically aided extrusion of natural rubber (NR) and styrene butadiene …
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Ultrasonic Modification of Condensation Processes
… a gold on glass interface was developed. Through ultrasonic treatment of a glass substrate during deposition, a thin gold film approximately 100 Å thick was produced. Resistance measurements revealed a resistance that was over 50% lower than an identical sample that was created without ultrasonic …
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Ultrasonically Assisted Single Screw Extrusion, Film Blowing and Film Casting of LLDPE/Clay and PA6/Clay Nanocomposites
… of this study was to investigate the effect of ultrasonic treatment on the dispersion of modified clay particles in LLDPE and PA6 matrices and the final properties of nanocomposites. LLDPE and PA6 are two polymers that are widely used in packaging industry. Blown and cast films were manufactured …
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Surface Area Mapping and Rinse Procedures of Raw Produce to Determine Effectiveness of Pathogen Removal
… The first part of this project examined whether ultrasonic treatment (40 kHz) of a rinse solution would enhance recovery of Salmonella spp. from various produce surfaces. Strawberries, apples, and cantaloupe were surface inoculated with a five-strain cocktail of nalidixic acid resistant …
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Control of the self-assembly of alkanethiol-coated gold nanoparticles in the solid state
… on water surfaces are subjected to thermal and ultrasonic treatment in an attempt to correct defects in the films, which are then transferred to solid substrates for observation. Unfortunately, none of these approaches is able to reduce the defect concentration in a lattice, although thermal …
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Enhancing biodiesel production from soybean oil using ultrasonics
… the second section of this study, the effect of ultrasonics on biodiesel production is studied by applying ultrasonics during transesterification reaction to the reactants, i.e., soybean oil and methanol, in the presence of sodium hydroxide as a catalyst. Ultrasonics are sound waves of a high …
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An investigation of the iron deposits in the East River Mountain district
… electrostatic, wet and dry magnetic. and ultrasonic methods of extraction were studied. Of these methods ultrasonic insonation of the ferruginous sandstone appears to hold the most promise for obtaining satisfactory concentrates of hematite from the sandstone. A marked upgrading of the …
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The influence of power ultrasound on leather processing
… Compared with a conventional process, ultrasonic dyeing can either shorten the dyeing time by 40-70% or facilitate low temperature dyeing. This remarkable enhancing effect has been attributed mainly to an increased diffusion coefficient (D) of dyestuff in the presence of ultrasound. It …
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Continuous Devulcanization of Ground Tire Rubber of Different Particle Sizes Using an Ultrasonic Twin-Screw Extruder
Continuous ultrasonic devulcanization of ground tire rubber (GTR) of 10 mesh and 30 mesh from Rondy Co., as well as whole truck tire rubber of 40 mesh (40TR), 140 mesh (140TR), 200 mesh (200TR), mixture of 40 and 80 meshes (84TR) and truck tire buffing rubber of 80 mesh (80BU) from Lehigh …
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An analysis of the kinetics for oil agglomeration of coal
… more stable than the polar oil (heptane) and an ultrasonic treatment produced the most turbid emulsions;In batch studies with Australian coal from the Ulan mine, emulsification decreased the time needed for agglomeration and created slightly more compact spherical agglomerates. Although the use …
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Stochastic Point Process Modeling for Engineering Applications
… This is accomplished by altering the duration of ultrasonic treatment on solutions with uniform concentrations to achieve varying levels of agglomeration. Similarly, the point process model is used to analyze computationally generated carbon nanotube microstructures, encompassing equiaxed and …
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High Intensity Ultrasound Processing of AlNi (50 wt.% Ni) Particles for Electrocatalytic Water Splitting
… process for hydrogen generation. During ultrasonic treatment of metal particles the changes in bulk (crystallite size, microstrain) and surface (composition, morphology) properties were monitored in order to unravel the fundamental aspects of acoustic cavitation and their effect on …
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Enhanced physicochemical and functional properties of pea (Pisum sativum) protein by pH-shifting and ultrasonication combined process
… the effects of pH-shifting in combination with ultrasonication on the structural and physicochemical properties of pea protein isolate (PPI). PPI dispersions (30 mg/ml each) were treated with ultrasonication, pH-shifting, and pH-shifting in combination with ultrasound and compared to control (no …
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Characterization of antioxidant activities of soybeans and assessment of their bioaccessibility after in vitro digestion
… extraction, conventional solvent extraction, and ultrasonic-assisted extraction (UAE) with 5 different common solvent systems including 50% and 80% aqueous acetone, 50 and 70% aqueous ethanol, and 80% aqueous methanol. The TPC in the soybean extracts and isoflavone compositions were significantly …
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Reconstruction of milk fat globules/membrane (MFGs/MFGM) and characterization of its physicochemical properties and techno-functionalities
… (pH 6.30 and 5.30, 25℃), and novel non-thermal treatment, ultrasonic treatments with different intensities. Additionally, anionic polysaccharide- high-methoxyl pectin (HMP) was incorporated to the raw milk before the cream separation, examining the resulting physicochemical properties and …