Showing papers in "Ultrasonics Sonochemistry in 2012"

TL;DR: Investigations discussed suggest that ultrasonic processing of food and dairy ingredients is a potential and viable technology that will be used by many food industries in the near future.

TL;DR: Rod-shaped nanocrystalline cellulose (NCC) was prepared from microcrystalline Cellulose (MCC) using the purely physical method of high-intensity ultrasonication, which indicated that the NCC had the cellulose I crystal structure similar to that of MCC.

TL;DR: The present study optimized the ultrasound assisted extraction (UAE) conditions to maximize the antioxidant activity [Ferric ion Reducing Antioxidant Power (FRAP)], total phenol content (TP) and content of individual polyphenols of extracts from marjoram.

TL;DR: Comparative analysis revealed that the sulfate radicals had the high oxidation potential and the use of ultrasound irradiation reduced the energy barrier of the reaction and increased the COD removal efficiency of organic pollutants.

TL;DR: Despite of Ostwald ripening, the droplet size of d-limonene nanoemulsion remained stable after 8 weeks of storage and was in agreement with the Lifshitz-Slezov-Wagner (LSW) theory.

TL;DR: The silk fibers containing CuBTC Metal-Organic Framework exhibited high antibacterial activity against Escherichia coli and Staphylococcus aureus and dense coating of silk fibers with CuBTC MOF results in decrease the emission intensity of silk fiber.

TL;DR: It is evidently shown that ultrasound cavitation is a powerful yet promising approach in the controlled production of aspirin nanoemulsions with smaller average droplet size in a range of 200-300 nm and with a polydispersity index (PDI) of about 0.30.

TL;DR: The ability of GO to serve as a solid support to anchor platinum particles on GO-TiO2 is useful in developing new photocatalysts.

TL;DR: It has been observed that low frequency sonochemical reactors can be effectively used for treatment of pesticide wastewaters and acidic conditions and optimum values of temperature and power dissipation favors the degradation of dichlorvos.

TL;DR: Overall it appears that considerable improvement can be obtained due to the use of pretreatment or alternate techniques for delignification, which is an energy intensive step in the paper making industries.

TL;DR: This paper describes a highly efficient and rapid approach of synthesizing different CuO nanostructures in aqueous solutions using ultrasound irradiation of copper(II) acetate with urea/sodium hydroxide in the presence of polyvinylpyrrolidone (PVP), as stabilizing polymer.

TL;DR: A sonochemistry-based synthesis method was used to produce nanocrystalline nickel oxide powder with ≈ 20 nm average crystallite diameter from Ni(OH)(2) precursor with high purity well-crystallized structure, confirming production of a wide band-gap structure.

TL;DR: The ultrasound-assisted extraction (UAE) of FC from HS was investigated and the optimum levels of these significant parameters were determined using response surface methodology (RSM), which revealed these as follows.

TL;DR: A huge attenuation of the wave is expected in regions where inertial bubbles are present, which is confirmed by numerical simulations of the nonlinear Helmholtz equation in a 1D standing wave configuration.

TL;DR: The synthesized nanoparticles were used for the photocatalytic reduction of hexavalent chromium in aqueous medium under solar radiation and it was observed that the initial reduction rates varied with the difference in morphology of ZnO crystallites.

TL;DR: The present work has conclusively established that hydrodynamic cavitation in combination with Fenton's chemistry can be effectively used for the degradation of dichlorvos.

TL;DR: The possibility to improve the nutritional value of olive oil by enriching it in phenolic compounds from olive leaves by ultrasonic maceration by optimized ultrasound-assisted extraction (UAE) proved the efficiency of this process when compared with the conventional solid-liquid extraction.

TL;DR: It is noteworthy that the nitrotoluene contaminants could be almost completely eliminated by virtue of sono-activated persulfate oxidation, wherein sulfate radicals serve as principal oxidants, of which amounts are significantly enhanced via addition of sodium sulfate.

TL;DR: The use of ultrasound as a means to control the crystallization process offers promising application in freezing of solid foods, however, optimum conditions should be selected.

TL;DR: It was found that morphology, particle size and phase of the products could be greatly affected by these parameters.

TL;DR: It was demonstrated that ultrasound irradiation can increase the rate of heat transfer significantly, resulting in considerably shorter cooling times, and promising effect for the enhancement of convective heat transfer rate during immersion cooling.

TL;DR: The fact that small SONO-SAPO-34 crystals could be prepared by the sonochemical method suggests a high nucleation density in the early stages of synthesis and slow crystal growth after nucleation.

TL;DR: The current improved, UAE of lycopene from tomatoes with the aid of RSM enhanced the extraction yield of trans-lycopene by 75.93% compared to optimised conventional method of extraction, which minimises the degradation and isomerisation of Lycopene.

TL;DR: Results show that sonolysis can significantly improve the solubilisation of organic solid waste, thus allowing higher biogas production from anaerobic treatment of sonicated substrates, and can lay the basis for the development of technologies useful to produce highBiogas quantities, in order to improve clean energy generation from biowaste.

TL;DR: Results indicated that UET is a very useful method for extraction bioactive polysaccharides from plant materials and could be explored as a potential antioxidant and immunostimulating agent for use in medicine or functional foods.

TL;DR: It has been concluded that SFP ultrasound can remarkably raise the enzymolysis efficiency and activity of ACE inhibitory peptides from wheat germ protein.

TL;DR: It is shown that, owing to the appearance of traveling waves, the primary Bjerknes force becomes very large and tends to expel the bubbles up to a stagnation point, and this strong attenuation creates a large traveling wave contribution, even for closed domain where standing waves are normally expected.

TL;DR: A catalyst-free one-pot four component methodology for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones under ultrasonic irradiation at room temperature using 1-butyl-3-methylimidazolium bromide, [Bmim]Br, as a neutral reaction medium is described.

TL;DR: The results indicated that the ultrasound-assisted extraction is a very useful method for the extraction of oleanolic acid and ursolic acid from L. lucidum.

TL;DR: Results show that ultrasound-assisted lipase-catalyzed transesterification of soybean oil with ethanol might be a potential alternative route to conventional alkali-catalystzed method, as high reaction yields were obtained at mild irradiation power supply and temperature.