Acoustic properties of crystallized fat: Relation between polymorphic form, microstructure, fracturing behavior, and sound intensity
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- 作者：Sandra Beyer Gregersen ; Malcolm J. W. Povey ; Morten Daugaard Andersen ; Marianne Hammershø ; j ; Michael Rappolt ; Amin Sadeghpour and Lars Wiking
- 刊名：European Journal of Lipid Science and Technology
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：118
- 期：9
- 页码：1257-1270
- 全文大小：2142K
- ISSN：1438-9312
文摘
This study demonstrates a link between the fat crystal network, fracturing behavior, and sound emission upon breakage. SOS, PSO, PPO, and POP rich fats were characterized by SAXS/WAXS and confocal laser scanning microscopy. Simultaneous texture and acoustic analysis was conducted by the use of a texture analyzer connected with an acoustic envelope detector and augmented by a broad band microphone combined with a digital sampling oscilloscope. Results shows a high correlation between negative values of the 2nd derivative of force curves, providing a measure of the energy release, and the sound intensity (r = 0.89, p < 0.05). No relation between acoustic properties and polymorphic behavior, crystal size, or crystal morphology was found. All fats crystallized into a β′ form within 1 day of storage. Subsequently, only the PPO and POP rich fats transformed into the β form (2–4 wk). Evaluation of the relative strength of intra- and interparticle links within the fat crystal network, indicate an important role of inter-particle links for the sound intensity, whereas intra-particle links were of less importance. It is hypothesized that strong interparticle links provide a strong rigid structure resulting in build-up of energy during compression and a fast energy release upon breakage accompanied by sound emission.