PMID- 34896805 OWN - NLM STAT- MEDLINE DCOM- 20220202 LR - 20231108 IS - 1873-2828 (Electronic) IS - 1350-4177 (Print) IS - 1350-4177 (Linking) VI - 81 DP - 2021 Dec TI - Optimization of ultrasonic-assisted enzymatic extraction of kiwi starch and evaluation of its structural, physicochemical, and functional characteristics. PG - 105866 LID - S1350-4177(21)00408-9 [pii] LID - 10.1016/j.ultsonch.2021.105866 [doi] LID - 105866 AB - A new ultrasound-assisted enzymatic extraction (UAEE) method of starch from kiwifruit was established and optimized using response surface methodology (RSM). Under optimal conditions (the pectinase-to-cellulase-to-papain ratio = 1:2:1 g/kg, solid/liquid ratio = 1:6.68, extraction pH = 5.23, ultrasound power = 300 W, and extraction temperature = 52 degrees C), the kiwi starch (KS) yield was about 4.25%, and the starch content of KS was 873.23 mg/g. Compared to other extraction methods, UAEE can obtain KS with high yield and purity with a shorter extraction time and less solvent and enzyme. The extracted KS has a low gelatinization enthalpy (8.02 J/g) and a high peak viscosity (7933 cP), with obvious particle properties and low adhesion. In addition, KS is rich in polyphenols, has strong antioxidant activity, and has higher contents of amylose starch (30.74%) and resistant starch (60.18%). This study established a novel and highly efficient method for KS extraction and suggest several possible applications for KS in the food industry. CI - Copyright (c) 2021. Published by Elsevier B.V. FAU - Wang, Jiaqi AU - Wang J AD - College of Food Science and Engineering, College of Enology, Northwest A&F University, Yangling 712100, China. FAU - Lan, Tian AU - Lan T AD - College of Food Science and Engineering, College of Enology, Northwest A&F University, Yangling 712100, China. FAU - Lei, Yushan AU - Lei Y AD - Shaanxi Rural Science and Technology Development Center, Xi'an 710054, China; Shaanxi Bairui Kiwifruit Research Co, Ltd., Xi'an 710054, China. FAU - Suo, Jiangtao AU - Suo J AD - Shaanxi Bairui Kiwifruit Research Co, Ltd., Xi'an 710054, China. FAU - Zhao, Qinyu AU - Zhao Q AD - College of Food Science and Engineering, College of Enology, Northwest A&F University, Yangling 712100, China. FAU - Wang, Haoli AU - Wang H AD - College of Food Science and Engineering, College of Enology, Northwest A&F University, Yangling 712100, China. FAU - Lei, Jing AU - Lei J AD - Shaanxi Bairui Kiwifruit Research Co, Ltd., Xi'an 710054, China. FAU - Sun, Xiangyu AU - Sun X AD - College of Food Science and Engineering, College of Enology, Northwest A&F University, Yangling 712100, China. FAU - Ma, Tingting AU - Ma T AD - College of Food Science and Engineering, College of Enology, Northwest A&F University, Yangling 712100, China; Shaanxi Rural Science and Technology Development Center, Xi'an 710054, China. Electronic address: matingting@nwafu.edu.cn. LA - eng PT - Journal Article DEP - 20211208 PL - Netherlands TA - Ultrason Sonochem JT - Ultrasonics sonochemistry JID - 9433356 RN - 9005-25-8 (Starch) SB - IM MH - *Fruit/chemistry MH - *Starch/chemistry/isolation & purification/physiology MH - *Ultrasonics PMC - PMC8666553 OTO - NOTNLM OT - Antioxidant capacity OT - Characteristics OT - Digestive resistance OT - Kiwi starch OT - Ultrasonic-assisted enzymatic extraction COIS- The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2021/12/14 06:00 MHDA- 2022/02/03 06:00 PMCR- 2021/12/08 CRDT- 2021/12/13 12:58 PHST- 2021/11/12 00:00 [received] PHST- 2021/12/03 00:00 [revised] PHST- 2021/12/07 00:00 [accepted] PHST- 2021/12/14 06:00 [pubmed] PHST- 2022/02/03 06:00 [medline] PHST- 2021/12/13 12:58 [entrez] PHST- 2021/12/08 00:00 [pmc-release] AID - S1350-4177(21)00408-9 [pii] AID - 105866 [pii] AID - 10.1016/j.ultsonch.2021.105866 [doi] PST - ppublish SO - Ultrason Sonochem. 2021 Dec;81:105866. doi: 10.1016/j.ultsonch.2021.105866. Epub 2021 Dec 8.