Orthogonal array design for optimization of phenyllactic acid-sodium alginate blend coating and its effect on the browning and quality of minimally processed lily bulbs
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Updated: Feb 2, 2026

Design and Optimization Strategies of a High-Performance Vented Box
Published on: June 9, 2023
Wenguang Fan1, Haiwei Ren1, Yonggang Wang1
1School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, P. R. China.
Background:
In order to develop active packaging of lily products, we for the first time investigated the effects of phenyllactic acid (PLA) incorporated into a sodium alginate (SA)-based coating on the quality of minimally processed lily bulbs stored at 4 °C for 15 days.
Results:
L9 (34 ) orthogonal array design showed that the optimal concentrations of PLA, SA and glycerinum were 0.03, 0.03 and 0.05 mol L-1 , respectively, to prepare a blend coating. It was noticed that a PLA-SA blend coating treatment could inhibit browning and maintain the firmness and ascorbic acid of minimally processed lily bulbs. Compared with the control, polyphenol oxidase (PPO), peroxidase (POD) and phenylalanine ammonia-lyase (PAL) activities of PLA-SA blend coating treated minimally processed lily bulbs reduced by about 31%, 21% and 29% on the 15th day, respectively. Total phenolic and quinone contents decreased, respectively, by 16% and 55% at the same time. Moreover, PLA-SA blend coating treatment eliminated the accumulation of malonaldehyde (MDA) while inhibiting microbial growth of minimally processed lily bulbs.
Conclusions:
These results showed PLA-SA blend coating could effectively maintain quality of minimally processed lily bulbs stored at 4 °C, and it might be a prospective technology. © 2018 Society of Chemical Industry.
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