Showing papers in "Ultrasonics Sonochemistry in 2014"

TL;DR: Overall, efficient wastewater treatment with high degree of energy efficiency can be achieved using combined process operating under optimized conditions, as compared to the individual process.

TL;DR: In this study, degradation of Rhodamine B (RhB) as a dye pollutant was investigated in the presence of pristine ZnO nanoparticles andZnO/CNTs composites using photocatalysis and sonocatalysis systems separately and simultaneously and the adsorption was found to be an essential factor in the degradation of the dye.

TL;DR: Analysis of experimental adsorption data to various kinetic models such as pseudo-first and second order, Elovich and intraparticle diffusion models show the applicability of the second-order equation model.

TL;DR: This review focuses on recent nanoemulsion-based DDS development and how cavitation through ultrasound and hydrodynamic means is useful to generate the pharmaceutical grade nanoemulsions including the complex double or submicron multiple emulsions.

TL;DR: Alkaline and ultrasound-assisted alkaline pretreatment under mild operating conditions have been investigated for intensification of delignification and the effect of NaOH concentration, biomass loading, temperature, ultrasonic power and duty cycle has been studied.

TL;DR: The results of this study demonstrate that the main reason for bacterial resistance to ultrasonic deactivation is due to the properties of the bacterial capsule.

TL;DR: Findings of the present study suggest that sonication technique may be applied to improve phytonutrients present naturally in apple juice.

TL;DR: The results indicated the usefulness of thermosonication for apple juice processing at low temperature, for enhanced inactivation of enzymes and microorganisms.

TL;DR: The Box-Behnken Design (BBD) generated satisfactory mathematical models which accurately explain the behavior of the system; allowing to predict both the extraction yield of phenolic and flavonol compounds, and also the antioxidant capacity of the grape pomace extracts.

TL;DR: The ultrasound-assisted extraction process of phenolics including anthocyanins from wine lees was modeled and optimized by means of artificial neural network (ANN) and genetic algorithm (GA) and the results agreed with the predicted values.

TL;DR: Decoupling experiments were performed to confirm that interactions between shockwaves and crystals are the main contributors to crystal breakage and emphasize the effects of ultrasound on the crystallization of organic molecules.

TL;DR: Kinetic study revealed that the degradation of diclofenac sodium fitted first order kinetics over the selected range of operating protocols, and combination of hydrodynamic cavitation with UV, UV/ TiO2 and UV/TiO2/H2O2 results in enhanced extents of degradation as compared to the individual schemes.

TL;DR: Results indicated that the ultrasound-assisted emulsification could be successfully used for the preparation of starch-stabilized nanoemulsions at lower temperatures (40-45 °C) and reduced energy consumption.

TL;DR: The performance comparison of ultrasound-assisted extraction and convention methods demonstrates that ultrasound is an effective and promising technology to extract bioactive substances from grape marc.

TL;DR: Application of heat during ultrasonic extraction yielded higher polyphenol content in extracts compared to the non-heated extraction, and the best combination of parameters was 50 mL of solvent volume, 20 min of extraction time and 70 °C of ultrasonic temperature.

TL;DR: The present work has conclusively established that combined processes based on hydrodynamic cavitation can be effectively used for complete degradation of imidacloprid.

TL;DR: The formulated nanoemulsion system suggested non-irritant and higher wound contraction rate with respect to control and neomycin treated rats, and it is proposed that the formulated system could be favourable for topical application in pharmaceutical industries.

TL;DR: The combination of HC with ozone proves to be the most energy efficient method for the degradation of RO4 as compared to HC alone and the hybrid process of HC and H2O2.

TL;DR: It was found that the length of the hypotenuse of the orthographic projections from the center of the pit, which basically represents the deformed area of the pits, increases with the hydrodynamic impact aggressiveness in a linear rate.

TL;DR: Structural feature analyses suggested that conjugates obtained by ultrasound treatment had less α-helix, more β-structures and random coil, higher surface hydrophobicity and less compact tertiary structure as compared to those obtained by classical heating and native PPI.

TL;DR: The results of the numerical simulations revealed that the main oxidant created in an O2 bubble is OH radical, and the predicted value of the bubble temperature for the production of OH radicals is in excellent agreement with that furnished by the experiments.

TL;DR: Influence of ultrasound technique on physico-chemical characteristics during extraction a subject of discussion and process alternatives are projected and discussed.

TL;DR: The present work indicates that the position and depth of vessel in an ultrasonic bath, diameter and shape of a vessel, frequency and input power have significant effect on the extraction yield.

TL;DR: It was observed that the acetate formulated CuO-ZnO-Al2O3/HZSM-5 nanocatalyst have smaller CuO crystals with better dispersion and stronger interaction between components in comparison to nitrate basednanocatalysts.

TL;DR: The results suggested that the activity of α-amylase, papain and pepsin could be modified by ultrasonic treatment mainly due to the variation of their secondary and tertiary structures.

TL;DR: In this paper, the authors investigated the effects of operating parameters, such as ultrasonic power, persulfate concentration, APFO concentration, and initial media pH on APFO degradation, and found that the SO4(-•)/APFO reactions at the bubble-water interface appear to be the primary pathway for the sonochemical degradation of the perfluorinated surfactants.

TL;DR: Results indicated that ultrasonic action is able to transform ACP in aliphatic organic compounds that could be subsequently eliminated in a biological system.

TL;DR: The aim of this work is to analyze current concepts regarding ultrasound effect on prokaryotic cells, and in particular ultrasound activity on bacterial biofilm.

TL;DR: To validate the model, high-power low frequency ultrasound was used to inactivate two microorganisms with very different sizes, viz., a bacterium, Enterobacter aerogenes and a yeast, Aureobasidium pullulans.

TL;DR: The rate and extent of decoloration of RB 19 increased with rising hydrogen peroxide concentration, ultrasonic powers and iron sulfate concentration but decreased with increasing dye concentration, and an optimum pH value of pH=3.5 was found.