Comparison of pH-dependent sonodisruption of re-assembled casein micelles by 35 and 130 kHz ultrasounds

Ashkan Madadlou; Mohammad Ebrahimzadeh Mousavi; Zahra Emam-Djomeh; Mohammadreza Ehsani; David Sheehan

doi:10.1016/j.jfoodeng.2009.06.008

Comparison of pH-dependent sonodisruption of re-assembled casein micelles by 35 and 130 kHz ultrasounds

Ashkan Madadlou, Mohammad Ebrahimzadeh Mousavi, Zahra Emam-Djomeh, Mohammadreza Ehsani, David Sheehan

Chemistry

University of Tehran

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Sonodisruption behavior of re-assembled casein micelles was compared at two ultrasound frequencies (35 and 130 kHz) by turbidity measurement and laser-diffraction based particle size analysis. Sonochemical ultrasound (130 kHz) was more effective than power ultrasound (35 kHz) in micelle disruption. This was attributed to the higher strain rates generated upon implosion of cavities, as well as the liberation of more free radicals to the surrounding medium. The higher the pH of solution, the more effective was the ultrasonic disruption due to a looser expanded assembly of particles at higher pH values. Sonochemical ultrasound decreased the consistency coefficient of casein solutions and increased their flow index except at a pH value of 6.35, while power ultrasound did not affect the flow behavior of solutions across the whole pH range. Crown

Original language	British English
Pages (from-to)	505-509
Number of pages	5
Journal	Journal of Food Engineering
Volume	95
Issue number	3
DOIs	https://doi.org/10.1016/j.jfoodeng.2009.06.008
State	Published - Dec 2009

Keywords

Casein
Cavitation
Power ultrasound
Sonochemical ultrasound

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10.1016/j.jfoodeng.2009.06.008

Cite this

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title = "Comparison of pH-dependent sonodisruption of re-assembled casein micelles by 35 and 130 kHz ultrasounds",

abstract = "Sonodisruption behavior of re-assembled casein micelles was compared at two ultrasound frequencies (35 and 130 kHz) by turbidity measurement and laser-diffraction based particle size analysis. Sonochemical ultrasound (130 kHz) was more effective than power ultrasound (35 kHz) in micelle disruption. This was attributed to the higher strain rates generated upon implosion of cavities, as well as the liberation of more free radicals to the surrounding medium. The higher the pH of solution, the more effective was the ultrasonic disruption due to a looser expanded assembly of particles at higher pH values. Sonochemical ultrasound decreased the consistency coefficient of casein solutions and increased their flow index except at a pH value of 6.35, while power ultrasound did not affect the flow behavior of solutions across the whole pH range. Crown",

keywords = "Casein, Cavitation, Power ultrasound, Sonochemical ultrasound",

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AU - Madadlou, Ashkan

AU - Mousavi, Mohammad Ebrahimzadeh

AU - Emam-Djomeh, Zahra

AU - Ehsani, Mohammadreza

AU - Sheehan, David

PY - 2009/12

Y1 - 2009/12

N2 - Sonodisruption behavior of re-assembled casein micelles was compared at two ultrasound frequencies (35 and 130 kHz) by turbidity measurement and laser-diffraction based particle size analysis. Sonochemical ultrasound (130 kHz) was more effective than power ultrasound (35 kHz) in micelle disruption. This was attributed to the higher strain rates generated upon implosion of cavities, as well as the liberation of more free radicals to the surrounding medium. The higher the pH of solution, the more effective was the ultrasonic disruption due to a looser expanded assembly of particles at higher pH values. Sonochemical ultrasound decreased the consistency coefficient of casein solutions and increased their flow index except at a pH value of 6.35, while power ultrasound did not affect the flow behavior of solutions across the whole pH range. Crown

AB - Sonodisruption behavior of re-assembled casein micelles was compared at two ultrasound frequencies (35 and 130 kHz) by turbidity measurement and laser-diffraction based particle size analysis. Sonochemical ultrasound (130 kHz) was more effective than power ultrasound (35 kHz) in micelle disruption. This was attributed to the higher strain rates generated upon implosion of cavities, as well as the liberation of more free radicals to the surrounding medium. The higher the pH of solution, the more effective was the ultrasonic disruption due to a looser expanded assembly of particles at higher pH values. Sonochemical ultrasound decreased the consistency coefficient of casein solutions and increased their flow index except at a pH value of 6.35, while power ultrasound did not affect the flow behavior of solutions across the whole pH range. Crown

KW - Casein

KW - Cavitation

KW - Power ultrasound

KW - Sonochemical ultrasound

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Comparison of pH-dependent sonodisruption of re-assembled casein micelles by 35 and 130 kHz ultrasounds

Abstract

Keywords

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