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Key takeaway: 'The efficiency of ultrasound irradiation on preparing micron-sized vermiculite particles is significantly affected by temperature, solvent, gas type, and reactor type.'
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The aim of this work is to compare the effects of grinding and ultrasonic treatment on vermiculite. Sonication produces a drastic change in particle size (mass …
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Buonomo et al. [62] investigated the effect of sonication time and temperature on thermal conductivity of Al 2 O 3-water nanofluid over different ranges of solid concentrations (0.1–20%) and temperatures (25–65 °C). They found that variations of sonication time have no considerable effect on the thermal conductivity of the nanofluid.
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The influence of sonication conditions (amplitude of ultrasound probe = 50, and 75%, time = 5, 10 and 15 min and temperature = 45, 55 and 65 °C) on the properties of yoghurt was investigated.
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Investigation of the effect of ultrasound (US) treatment with different sonication times on quality parameters of probiotic GY during refrigerated storage …
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Effect of sonication conditions: solvent, time, temperature and reactor type on the preparation of micron sized vermiculite particles F. Ali, L. Reinert, Jean-Marc Lévêque, L. Duclaux, Fabrice Muller, Shaukat ... temperature effect, Argon . 1. Introduction Vermiculite has been exploited widely over the past 60 years as a valuable insulating ...
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The optimum extraction conditions for total phenolic compounds from dried olive leaves were determined by using response surface methodology. Central composite design was used to investigate the effects of four independent variables such as solvent composition (ethanol in water, 20 to ), extraction temperature (20 to 60 °C), …
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Sonication time and energy transmission to solvent were adjusted using time and amplitude regulation whereby the range of output power supply was within 20–. To investigate the effect of sonication parameters, different solutions of fixed GNPs concentration (1 mg/mL) were added to the 100-mL ethanol solvent in which …
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Another study discussed the effect of solvent properties on reaction efficiency, ... The sonication conditions, reaction vessel, atmosphere gas, and cooling system were the same as those used for sonoluminescence measurements. ... The high sonoluminescence intensity from aromatic alcohols can also be explained by the high …
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The same trend was obtained for Mahbubul et al. [79] who prepared alumina/water nanofluid (0.5 vol.%) of particle size 13 nm, using an ultrasonic homogenizer machine (model 505, Fisher Scientific) and investigated by varying the sonication time from 0 to 180 min by rheometer (LVDV-III ultra, Brookfield) at the temperature range 15°–45 °C ...
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The results showed that sonication amplitude, time, temperature, membrane ratio, sample volume, and density need to be considered in order to optimize membrane coating of polymeric nanoparticles.
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Sonication promotes the dissolution of Na exchangeable cations through exfoliation. Improved exfoliation by sonication at 90°C in water or at room temperature in …
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Effect of sonication conditions: Solvent, time, temperature and reactor type on the preparation of micron sized vermiculite particles. Mujtaba Shah. 2014, Ultrasonics …
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The potential-time curves depicted in Figure 5 show long induction time and the serious effect of sonication on the equilibrium potential; stronger sonication leads to less negative deposition ... Regarding the effect of operative conditions, temperature increase plays a positive role enhancing the deposition yield and smoothing the …
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Search life-sciences literature (42,200,633 articles, preprints and more) Search. Advanced search
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Major conditions to be optimized include the extraction time, the amount and polarity of the solvent, and the type and amount of the sample. This method allows extraction of a large number of samples at the same time in an ultrasonic bath and is adequate for thermally labile analytes, since extraction is performed at room temperature.
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Systematic optimization of sonication conditions. Part 1. (A) Schematic of the Bioruptor XL water bath with tube positions numbered from 1 to 12 in the left (L) and right (R) carousels; red arrows indicate the alignment marks for carousel assembly and positioning. (B) The effect of sample volume on sonication efficiency at low power …
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to determine the effect of frequency, temperature, and time of sonication on the xanton content. The parameters controlled are frequency (20 - 40 kHz), temperature (25 - 35oC), and sonication time (20 - 40 minutes). The solvent used in the extraction was methanol with a ratio of mangosteen peel: solvent = 1: 10
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Sonication time effect on evaporation rate of GNP@MWCNT nanofluid was investigated. ... Given the conditions, the total efficiency will increase insignificantly. By comparing two figures, it can easily be seen that the GNP@MWCNT composite nanofluid has an effective role in the efficiencies. ... effects of temperature and concentration. Int ...
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The influence of sonication conditions (amplitude of ultrasound probe = 50, and 75%, time = 5, 10 and 15 min and temperature = 45, 55 and 65 ºC) on the properties of yoghurt was investigated. The apparent viscosity, hardness and lightness increased when sonication time, temperature and amplitude increased.
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Abstract In this study, we elucidate the effect of different sonication techniques to efficiently prepare particle dispersions from selected non-functionalized NPs (Cu, Al, Mn, ZnO), and corresponding consequences on the particle dose, surface charge and release of metals. Probe sonication was shown to be the preferred method for …
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The bubbles breakdown, which is called cavitation, creates dramatic effects in the sonicated liquid and give rise to pressures up to 1000 atm and temperatures of up to 5000 K [Citation 11].Acoustic cavitation impact is strong enough to split up the fine particle agglomerates and disperse them more uniformly in liquids [Citation 12].In the …
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were the extraction time, temperature, solvent-solid ratio and the ethanol concentration. Obtained results show that the recommended optimal conditions for the extraction of the total phenolic compounds from olive leaves were found at 40°C with a solvent/solid ratio of 30:1 and ethanol concentration of 80% (v/v)
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The effects of ultrasonication time, power, solvent and temperature are studied by the author Zhang and Chen and the Fig. 10 (a). gives the images of SEM showing the graphene nanoparticles morphology before and after sonication, the amount of the agglomeration and size of the agglomerates are seen in the Fig. 10 (b) and …
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The effects of ultrasonication time, power, solvent and temperature are studied by the author Zhang and Chen [84] and the Fig. 10 (a). gives the images of SEM showing the graphene nanoparticles morphology before and after sonication, the amount of the agglomeration and size of the agglomerates are seen in the Fig. 10 (b) and …
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Quicker preparation of micron-sized vermiculite by sonication in Rosett reactor. Reagglomeration for sonication time length higher than 5h. Sonication promotes the dissolution of Na exchangeable cations through exfoliation. Improved exfoliation by sonication at 90°C in water or at room temperature in …
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Ultrasonication produces radicals as a result of critical temperature and pressure conditions, which are responsible for dietary component alterations. ... Sonication is a time-consuming method that is only suitable for small batches. ... Effect of solvent composition and its interaction with ultrasonic energy on the ultrasound-assisted ...
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The effects of temperature, time, solvent and sonication conditions under air and Argon are described for the preparation of …
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Sonication vessel. The sonication vessel or container holds the sample that needs to be processed. ... which may affect the stability of heat-sensitive compounds or induce unwanted reactions. ... Harun W.S.W. …
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Temperature, ultrasound frequency, extraction time and solvent/medium nature affect not only the extraction yield, but also the composition of the extract. 6.1. Influence of Temperature
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