PMID- 35252303 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220308 IS - 2296-861X (Print) IS - 2296-861X (Electronic) IS - 2296-861X (Linking) VI - 9 DP - 2022 TI - Effect of Frying Process on Nutritional Property, Physicochemical Quality, and in vitro Digestibility of Commercial Instant Noodles. PG - 823432 LID - 10.3389/fnut.2022.823432 [doi] LID - 823432 AB - The effects of frying process on the nutritional property, physicochemical quality, and in vitro digestibility of instant noodle products are investigated in this study. Scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR) were also used to explore the changes in the microstructure and protein transformation. Noodles, after the frying process, showed a lower proportion of carbohydrate, protein, fiber, and also total starch and digestible starch, but higher content of fat and resistant starch in the proximate analysis. The frying process was also considered to improve the texture, surface color, and sensory properties of instant noodle products, accompanied by better cooking quality, including shorter cooking time and lower cooking loss during the rehydration. The honeycomb-like, porous, and less uniformed structure, and also the higher levels of beta-sheets and beta-turns, and the lower proportion of alpha-helixes of protein structure from fried instant noodle was also observed. The in vitro digestibility of starch and protein were downregulated in the fried group (81.96% and 81.31, respectively, on average) compared with the non-fried group (97.58% and 88.78, respectively, on average). Thus, the frying process lowered the glycemic index and regulated protein secondary structure by inhibiting continuous digesting enzyme activity, generating starch-lipid complexes, and changing the levels of protein transformation. In conclusion, our findings will provide an innovative evaluation of the frying process on instant noodles and even other various starch-based prepared food products. CI - Copyright (c) 2022 Wang, Li, Hu, Zhang, Liu, Zhang and Wang. FAU - Wang, Jin AU - Wang J AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. FAU - Li, Ang AU - Li A AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. FAU - Hu, Jiaqiang AU - Hu J AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. FAU - Zhang, Bowei AU - Zhang B AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. FAU - Liu, Jingmin AU - Liu J AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. FAU - Zhang, Yan AU - Zhang Y AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. FAU - Wang, Shuo AU - Wang S AD - Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China. LA - eng PT - Journal Article DEP - 20220217 PL - Switzerland TA - Front Nutr JT - Frontiers in nutrition JID - 101642264 PMC - PMC8891372 OTO - NOTNLM OT - frying process OT - in vitro digestibility OT - instant noodle OT - nutritional property OT - physicochemical quality COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/03/08 06:00 MHDA- 2022/03/08 06:01 PMCR- 2022/01/01 CRDT- 2022/03/07 06:08 PHST- 2021/11/27 00:00 [received] PHST- 2022/01/05 00:00 [accepted] PHST- 2022/03/07 06:08 [entrez] PHST- 2022/03/08 06:00 [pubmed] PHST- 2022/03/08 06:01 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - 10.3389/fnut.2022.823432 [doi] PST - epublish SO - Front Nutr. 2022 Feb 17;9:823432. doi: 10.3389/fnut.2022.823432. eCollection 2022.