Influence of Ultrasonic Pretreatment with Hot Air Drying on Nutritional Quality and Structural Related Changes in Dried Sweet Potatoes

被引：23
作者：
Rashid, Muhammad Tayyab [1 ]
Ma, Haile [1 ]
Jatoi, Mushtaque Ahmed [2 ]
Hashim, Malik Muhammad [3 ]
Wali, Asif [4 ]
Safdar, Bushra [5 ,6 ]
机构：
[1] Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Shah Abdul Latif Univ, Dept Bot, Khairpur 6602O, Sindh, Pakistan
[3] Gomal Univ, Dept Food Sci & Technol, Dera Ismail Khan, Pakistan
[4] Karakoram Int Univ, Dept Agr & Food Technol, Gilgit 1500, Pakistan
[5] Beijing Technol & Business Univ, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing 00048, Peoples R China
[6] Beijing Technol & Business Univ, Sch Food & Chem Technol, Beijing Engn & Technol Res Ctr Food Additives, Beijing 100048, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FOOD ENGINEERING | 2019年 / 15卷 / 08期
关键词：
dual-frequency ultrasound; drying; phenolic profile; carotenoids; SEM; FTIR; RADICAL-SCAVENGING ACTIVITY; ANTIOXIDANT ACTIVITY; CAROTENOID CONTENT; PHENOLIC CONTENT; KINETICS; CAPACITY; FRUIT; MICROSTRUCTURE; ANTHOCYANIN; TEMPERATURE;
D O I：
10.1515/ijfe-2018-0409
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
The drying of sweet potatoes not only helps to prolong its storage life but the dried form reportedly enriched with high bioactive compounds than regular sweet potatoes. The study aims to investigate the influence of dual-frequency ultrasound pretreatments (40 and 60 kHz) at two different hot air drying temperatures (70 degrees C and 80 degrees C) on quality of dried product. Ultrasound pretreatment at 40 kHz with 70 degrees C maintained the phytochemical compounds in the dried sweet potatoes. Ellagic acid and chlorogenic acid were found as predominant phenolic acids using HPLC analysis, while identification of two new bioactive compounds quercetin-3-rhamnoside and quercetin 3-beta-D-glucoside were the novel finding of the current study. A short new band appeared in FTIR in all treatments from 2164 to 2041 cm(-1) which refers to C = C alkenes functional group. The multivariate analysis showed a great influence of USH3 and USH1 with a positive relationship with most of bioactive compounds.
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页数：14
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