Effect of slit dual-frequency ultrasonic emulsification technology on the stability of walnut emulsions

Ouyang, Ningning; Ma, Haile; Ding, Yanheng; Lü, Feng; Guo, Li‐Na; Zhang, Xueli; Li, Zhuoshi

doi:10.1016/j.ultsonch.2021.105876

Cited by 17 publications

(5 citation statements)

References 49 publications

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“…Thus, it can be figured out that dual-frequency synchronous ultrasonic treatment is more beneficial for stabilizing the emulsion of LS/XG-NPs compared to single-frequency ultrasonic treatment. In Ouyang's research [11] , it was noted that the application of multi-frequency ultrasonic treatment led to a decrease in particle size and an elevation in zeta potential within the emulsion. These combined effects ultimately resulted in a significant improvement in the emulsion's stability.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, it plays a crucial role in the formation of diverse interfacial structures within emulsions. Ouyang et al [11] revealed that emulsions subjected to dual-frequency ultrasound at 28/68 kHz demonstrated remarkable improvements, including a reduction in particle size to 2.05 μm and an increase in zeta potential to 40 mV. These enhancements played a pivotal role in significantly enhancing the stability of the walnut emulsion.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of physicochemical properties, microstructure and stability of lotus root starch/xanthan gum stabilized emulsion by multi-frequency power ultrasound

Liang,

Zhou,

Rehman

et al. 2023

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of physicochemical properties, microstructure and stability of lotus root starch/xanthan gum stabilized emulsion by multi-frequency power ultrasound

Liang,

Zhou,

Rehman

et al. 2023

Ultrasonics Sonochemistry

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“…[28][29][30] Previous research [25][26][27]31,32 provides the foundation to expect that cavitation dynamics and SW propagation may vary distinctly due to significantly different density, surface tension, viscosity, vapor pressure, and speed of sound in the studied liquids. The results of this work can be applied to a wider range of dual frequency sonoprocesses where different properties are required, such as emulsification, 33 sonochemical synthesis, 34,35 in clinical practice, 36 and most notably the exfoliation of 2D nanomaterials. 27 Experiments were conducted for two frequency setups: a low frequency (LF) sonotrode (24 kHz) and a DF system consisting of both the LF sonotrode and a HF transducer membrane (1174 kHz), i.e., 24 þ 1174 kHz.…”

Section: Introductionmentioning

confidence: 99%

Dual frequency ultrasonic cavitation in various liquids: High-speed imaging and acoustic pressure measurements

et al. 2023

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Ultrasonic cavitation is used in various processes and applications, utilising powerful shock waves and high-speed liquid jets generated by the collapsing bubbles. Typically, a single frequency source is used to produce the desired effects. However, optimisation of the efficiency of ultrasound reactors is necessary to improve cavitation activity in specific applications such as for the exfoliation of two dimensional (2D) materials. This research takes the next step to investigate the effect of a dual frequency transducer system on the bubble dynamics, cavitation zone, pressure fields, acoustic spectra and induced shock waves for four liquids with a range of physical properties. Using ultra-high-speed imaging and synchronised acoustic pressure measurements, the effect of ultrasonic dual frequencies on bubble dynamics was investigated. The addition of a high frequency transducer (1174 kHz) showed that the bubble fragments and satellite bubbles induced from a low frequency transducer (24 kHz) were able to extend their lifecycle, increase spatial distribution, thus, extending the boundaries of the cavitation zone. Furthermore, this combination of ultrasonic frequencies generated higher acoustic pressures (up to 180%) and enhanced the characteristic shock wave peak, indicating more bubble collapses and the generation of additional shock waves. The dual frequency system also enlarged the cavitation cloud size under the sonotrode. These observations specifically delineated the enhancement of cavitation activity using a dual frequency system pivotal for optimisation of existing cavitation-based processing technologies.

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“…Some researchers have tried to produce meat products containing walnut kernel (Ayo et al, 2005;Cofrades et al, 2004). Some studies related to the production of drinks and emulsions using walnut kernels have also been carried out (Gharibzahedi et al, 2012;Ouyang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Walnut Paste: A Healthy Alternative for Nutella Consumers

Covaliov¹,

Siminiuc²,

POPOVICI³

2023

EPHELS

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Nutella is the best-selling chocolate and hazelnut spread in the world. It is known that the main ingredients of Nutella are sugar (55%) palm oil (23%), hazelnuts (14%), cocoa solids and skimmed milk (8%). Currently, worldwide, there is a tendency to make healthier food choices, and the sugar and palm oil from Nutella’s formulation are ingredients blamed for causing certain health disorders (obesity, cardiovascular diseases and diabetes). In this order, the purpose of the research was to develop the technology for obtaining walnut paste, since walnuts have proven prophylactic properties, with a low sugar content and without palm oil. The quality of the elaborated walnut paste was determined and monitored during the shelf life in terms of oxidative stability (Acidity index (FFA) and Peroxide value (PV)), total phenols content, antioxidant activity and rheology. The obtained results demonstrated that during 4 months of storage the acidity index of the walnut paste did not register significant changes, reaching maximum values of 0.17±0,01 (Oleic g/100 g), while the peroxide values evolved up to 2.22±0,03 meq/kg oil. The slow evolution of the oxidative parameters can be due to the phenolic compounds in walnut paste that recorded a value of 47.2±0,36 mg GAE/g with an antioxidant activity (DPPH free radical scavenging) of 70±1,02 %. Concerning sensory characteristics, the walnut paste samples were positively appreciated in comparison with Nutella and no significant quality difference was observed after storage for 4 months.

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Effect of slit dual-frequency ultrasonic emulsification technology on the stability of walnut emulsions

Abstract: Highlights Slit dual-frequency ultrasonic was used to emulsify walnut emulsions. Oil droplets and protein particles were decreased by ultrasonic emulsification. The stability of walnut emulsions was improved by slit dual-frequency ultrasonic.

Cited by 17 publications

References 49 publications

Improvement of physicochemical properties, microstructure and stability of lotus root starch/xanthan gum stabilized emulsion by multi-frequency power ultrasound

Improvement of physicochemical properties, microstructure and stability of lotus root starch/xanthan gum stabilized emulsion by multi-frequency power ultrasound

Dual frequency ultrasonic cavitation in various liquids: High-speed imaging and acoustic pressure measurements

Walnut Paste: A Healthy Alternative for Nutella Consumers

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