scholarly journals Effects of Dual-Frequency Ultrasound-Assisted Thawing Technology on Thawing Rate, Quality Properties and Microstructure of Large Yellow Croaker (Pseudosciaena crocea)

Foods ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 226
Author(s):  
Hao Cheng ◽  
Chuhan Bian ◽  
Yuanming Chu ◽  
Jun Mei ◽  
Jing Xie
Keyword(s):  
Water Holding Capacity ◽  
Single Frequency ◽  
Large Yellow Croaker ◽  
Dual Frequency ◽  
K Value ◽  
Quality Properties ◽  
Ultrasound Assisted ◽  
Thawing Rate ◽  
Water Holding ◽  
Frequency Ultrasound

This research evaluated the effects of dual-frequency ultrasound-assisted thawing (UAT) on the thawing time, physicochemical quality, water-holding capacity (WHC), microstructure, and moisture migration and distribution of large yellow croaker. Water thawing (WT), refrigerated thawing (RT), and UAT (single-frequency: 28 kHz (SUAT-28), single-frequency: 40 kHz (SUAT-40), dual-frequency: 28 kHz and 40 kHz (DUAT-28/40)) were used in the current research. Among them, the DUAT-28/40 treatment had the shortest thawing time, and ultrasound significantly improved the thawing rate. It also retained a better performance from the samples, such as color, texture, water-holding capacity and water distribution, and inhibited disruption of the microstructure. In addition, a quality property analysis showed that the pH, total volatile basic nitrogen (TVB-N), and K value were the most desirable under the DUAT-28/40 treatment, as well as this being best for the flavor of the samples. Therefore, DUAT-28/40 treatment could be a possible thawing method because it improves the thawing rate and maintains the quality properties of large yellow croaker.

Regeneration of Granular Activated Carbon Using Dual-Frequency Ultrasound

2012 ◽  
Vol 616-618 ◽  
pp. 1707-1710
Author(s):  
Jiong Yuan Lu ◽  
San Fan Wang ◽  
Jin Feng Zhu
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Experimental Results ◽  
Single Frequency ◽  
Dual Frequency ◽  
Thermal Regeneration ◽  
Regeneration Efficiency ◽  
The Individual ◽  
Better Than ◽  
Frequency Ultrasound

The saturate granular activated carbon(GAC) which adsorbed Ni2+ is regenerated using dual-frequency ultrasound. The individual frequency is 45KHz, 80KHz and 100KHz respectively. The experimental results show that the regeneration efficiency using dual-frequency ultrasound is better than that using single- frequency ultrasound under the same experimental condition. When the two ultrasound’s frequency is 45KHz, the regeneration efficiency is 81.03%, comparing single- frequency ultrasound it increase by 40% and it is the best in six group dual-frequency ultrasound. In conclusion, the dual-frequency ultrasound regeneration showed a possibility as an alternative to chemical and thermal regeneration of GAC.

Effect of Dual Frequency Ultrasound on the Bubble Formation in a Capillary Tube

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
Benwei Fu ◽  
Nannan Zhao ◽  
Guoyou Wang ◽  
Hongbin Ma
Keyword(s):  
Bubble Growth ◽  
High Speed ◽  
Capillary Tube ◽  
Bubble Formation ◽  
Single Frequency ◽  
Quartz Tube ◽  
Outer Diameter ◽  
Dual Frequency ◽  
Heating Section ◽  
Frequency Ultrasound

A visual experimental investigation was conducted to determine the effect of dual frequency ultrasound on the bubble formation and growth in a capillary quartz tube. Two piezoelectric ceramics were used in this experiment. They were made of Pb-based lanthanum-doped zirconate titanates (PLZTs). The PLZTs were placed on a quartz tube with an inner diameter of 2 mm and an outer diameter of 3 mm. The capillary tube was vacuumed first and then charged with water using a filling ratio of 70%. The ultrasonic sound was applied to the heating section of a capillary tube. The bubble formation and growth were recorded by a high speed camera. As shown in figures, when the ultrasound with a single frequency of either 154 kHz or 474 kHz was applied, only one bubble was generated. When the dual frequencies of 154 kHz and 474 kHz were applied, more bubbles were generated. The speed of the bubble growth with dual frequency ultrasound was much higher than that with a single frequency. When a dual frequency ultrasound (154 kHz and 474 kHz) was used, the nucleation sites for bubble formation were significantly increased and the bubble growth rate enhanced.

Dual-Frequency Ultrasonic Desorption of Pb2+ from Coconut Shell Activated Carbon

2013 ◽  
Vol 777 ◽  
pp. 38-42
Author(s):  
Jian Zhou ◽  
San Fan Wang
Keyword(s):  
Activated Carbon ◽  
Metal Ion ◽  
Coconut Shell ◽  
Single Frequency ◽  
Dual Frequency ◽  
Cavitation Effect ◽  
Desorption Efficiency ◽  
The Stability ◽  
Coconut Shell Activated Carbon ◽  
Frequency Ultrasound

Desorption experiments of coconut shell activated carbon (CSAC) saturated with Pb2+had been conducted in presence of dual-frequency and single-frequency (30 kHz,500 kHz,1200 kHz) ultrasound. The desorption efficiency was better at dual-frequency ultrasound than at single-frequency ultrasound. The best of desorption efficiency of Pb2+was 65.5% at 500×500 kHz. The desorption efficiency of Pb2+increased by increasing temperature, but when the temperature was more than 50°C, the desorption efficiency decreased initially. The stability of CSAC was not affected with cavitation effect produced by ultrasound of frequency of 500×500 kHz. The carbon loss was less. The rate of loss was only 0.6%. In conclusion, ultrasound was used as alternative method to regenerate activated carbon adsorbing with heavy metal ion.

scholarly journals Effects of High-Voltage Electric Field Process Parameters on the Water-Holding Capacity of Frozen Beef during Thawing Process

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Yaming Zhang ◽  
Changjiang Ding ◽  
Jiabao Ni ◽  
Zhiqing Song ◽  
Rui Zhao
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Quality Parameters ◽  
Electrode System ◽  
Water Holding Capacity ◽  
Plate Electrode ◽  
Thawing Process ◽  
Single Factor Analysis ◽  
Thawing Rate ◽  
Water Holding

In order to investigate the thawing time and water-holding capacity under high-voltage electric field (HVEF), we studied the thawing experiments of frozen beef in a multiple needles-to-plate electrode system. The electric field, thawing characteristics, and quality parameters during the thawing process were measured. The results showed that compared with the control, the thawing time of beef under HVEF was significantly shortened, the thawing rate increased significantly, the drip loss decreased, and the centrifugal loss increased during the thawing process. By the response surface analysis and single-factor analysis of variance, the best thawing conditions for each thawing parameter were determined. It provides a theoretical basis and practical guidance for understanding the characteristic parameters of the high-voltage electric field thawing technology.

scholarly journals Postmortem Changes in pH, K-value, Water-holding Capacity and Contents of Free Amino Acids of Chicken Meat

1990 ◽  
Vol 61 (11) ◽  
pp. 998-1003
Author(s):  
Ryoichi TANABE ◽  
Koichi MOTOMURA ◽  
Takakichi KURIKI ◽  
Shirou ANDOU ◽  
Toshio IKEDA ◽  
...  
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Chicken Meat ◽  
Water Holding Capacity ◽  
Postmortem Changes ◽  
K Value ◽  
Water Holding
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