Study into mechanisms of the enhancement of multibubble sonoluminescence emission in interacting fields of different frequencies

Ciuti, P.; Дежкунов, Н. В.; Francescutto, Alberto; Calligaris, F.; Sturman, F.

doi:10.1016/s1350-4177(03)00097-x

Cited by 36 publications

(19 citation statements)

References 6 publications

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“…The hypothesis behind the use of a multiple frequency technique is that multiple frequency sonication will allow bubbles with a wide range of sizes to generate cavitation and hence increase the cavitation intensity. In a two-frequency system, the cavitation enhancement as described by iodine release is more than additive (Ciuti et al, 2003). In the case of a sonication treatment assisted by external pressure, an increase in bubble implosion intensity can increase cavitation activities and hence result in a boost in kill rate (Paga´n et al, 1999).…”

Section: Maximizing Cavitation Activitymentioning

confidence: 99%

Power Ultrasound

Feng

Yang

Hielscher³

2008

Food sci. technol. int.

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The use of ultrasound as a processing aid has been explored in various industrial sectors for over fifty years, but the application of this physical energy in food processing is relatively new. In this article, the current research and development activities of power ultrasound centered on food and bioprocessing applications are summarized. The mode of action of ultrasonication is attributed to several mechanical and chemical actions caused by cavitation, which include localized hot spots, formation of shock waves, microsteaming, and liquid jets, as well as the production of chemical species that will also impact the process kinetics and food quality attributes. Means to enhance cavitation activity is addressed. The research needs for the future development of ultrasound food processing are also discussed.

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Section: Maximizing Cavitation Activitymentioning

confidence: 99%

Power Ultrasound

Feng

Yang

Hielscher³

2008

Food sci. technol. int.

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“…This is a great advantage since historically the study of a reaction at different frequencies would necessitate using different transducers for each. Recently, a few studies have used systems involving concurrent dual frequency sonication (37)(38)(39)(40) in order to make use of the advantages of both low and high frequencies, ie, to achieve maximum physical and chemical effects.…”

Section: Experimental-technical Detailsmentioning

confidence: 99%

Sonochemistry

Ashokkumar¹,

Mason²

2007

Kirk-Othmer Encyclopedia of Chemical Technology

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Sonochemistry is a relatively new term that arrived on the scene in the late 1970s and was then simply defined as the uses of ultrasound in chemistry and processing. Ultrasound is part of the overall sound spectrum, but is generally classified as sound beyond the frequency that can be detected by the human ear. Sometimes called “silent sound” it ranges from 20 kHz to 10 MHz within which it can be roughly subdivided into three main regions: low frequency, high power ultrasound (20–100 kHz); intermediate frequency, medium power ultrasound (100 kHz–1 MHz); and high frequency, low power ultrasound (1–10 MHz). The range from 20 kHz to 1 MHz is generally used in sonochemistry, whereas frequencies > 1 MHz are more commonly used in nondestructive testing and medicine. The driving force for sonochemistry is acoustic cavitation, which is the formation of small cavities in a fluid produced by ultrasound that undergo highly energetic collapse. A number of text books have been published that explore different aspects of sonochemistry. This article aims to provide the readers with a fundamental understanding of acoustic cavitation and its associated physical and chemical effects. Detailed information on the events that are involved in acoustic cavitation is discussed in the first section. Among the major effects generated by acoustic cavitation is Sonoluminescence and Sonochemistry, but only brief information is provided on the former since it is not the primary focus of this article. The majority of the discussion is focused upon Sonochemistry within which reactions have been subdivided into different categories, as suggested in the literature. Although sonochemistry is useful for a variety of applications, two areas that are particularly prominent are materials synthesis and the degradation of organic pollutants.

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“…On the other hand, the efficacy of lower-frequency ultrasound waves in the process of induced inertia cavitation is higher than higher frequency, and the dualfrequency ultrasound sonication induced a greater sonochemical effect in vitro than the single-frequency irradiation (Kawabata et al 1996;Umemura et al 1999;Ciuti et al 2000Ciuti et al , 2003Feng et al 2002;and Barati et al 2007). Studies of cavitation fields and their effects on the therapeutic were performed in vitro rather than in vivo because the induction and control of cavitation is easier in vitro and the pocket of gases can exist in the sonication medium (Umemura et al 1999;Miyoshi et al 1997Miyoshi et al , 2000Miyoshi et al , 2003Miller et al 1996;Chen et al 2003).…”

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confidence: 99%