Related Experiment Video
Updated: Jan 19, 2026

Rapid High Throughput Amylose Determination in Freeze Dried Potato Tuber Samples
Published on: October 14, 2013
Effects of multi-frequency ultrasound on freezing rates and quality attributes of potatoes
Zhiwei Zhu1, Peizhi Zhang1, Da-Wen Sun2
1School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China.
Abstract:
The effects of multi-frequency ultrasound assisted freezing on the freezing rate, microstructure, quality properties (drip loss, firmness, total calcium content, l-ascorbic acid content and total phenol content) of potatoes were studied. The results indicated that the freezing effects of multi-frequency ultrasound was better than those of single-frequency ultrasound. Multi-frequency ultrasound could significantly increase the freezing rate and preserve the quality of frozen samples better. With increase in the number of ultrasonic frequencies, the freezing effect was more obvious. In addition, scan electron microscopy (SEM) images showed that the ice crystals formed by the multi-frequency ultrasonic treatment were fine and uniformly distributed, which caused less damage to the frozen potato samples. From the analysis of the quality attributes, the nutritional values of the samples after multi-frequency ultrasonic treatment was higher, but attention should be paid to the negative influence of the hydroxyl radical generated by the multi-frequency ultrasound.
Related Concept Videos
06:57Rapid High Throughput Amylose Determination in Freeze Dried Potato Tuber Samples
High-frequency Ultrasound Imaging of the Abdominal Aorta
High-frequency ultrasound systems are used to acquire high resolution images. Here, the use of a state-of-the-art system will be demonstrated to image the morphology and hemodynamics of small pulsatile arteries and veins found in mice and rats. Ultrasound is a relatively inexpensive, portable, and versatile method for the noninvasive...
07:34Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound (30/45MHZ) System
10:02High-frequency Ultrasound Imaging of Mouse Cervical Lymph Nodes
11:51Potato Virus X-Based microRNA Silencing (VbMS) In Potato.
07:33Agroinfiltration and PVX Agroinfection in Potato and Nicotiana benthamiana
