Combined radio frequency and hot water pasteurization of Nostoc sphaeroides: Effect on temperature uniformity, nutrients content, and phycocyanin stability

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NSTL
Elsevier

外文摘要：Phycocyanin, the main pigment substance, is abundant in Nostoc sphaeroides. However, the thermal stability of phycocyanin is insufficient, so the processing and storage of Nostoc sphaeroides remain a critical problem. In this study, we have developed an innovative pasteurization technology: Radio frequency combined hot water pasteurization (RFCHWP) in order to improve the product quality of Nostoc sphaeroides. The results showed that RFCHWP technology exhibited good thermal uniformity and was effective in killing microorganisms in Nostoc sphaeroides. Compared to high-pressure steam sterilization (HPSS), heating by RFCHWP for less than 20 min had little effect on the color and texture of Nostoc sphaeroides samples. The ascorbic acid content of Nostoc sphaeroides decreased to 18.31 and 17.45 mg/100 g in the RFCHWP 30 min and HPSS samples, respectively. The phycocyanin content of Nostoc Sphaeroides in HPSS samples decreased by 32.89% compared with that in the RFCHWP samples. Phycocyanin was stable at a temperature of 50 degrees C and pH of 6-8. The results of this study showed that RFCHWP technology could be used as a bactericidal method for Nostoc sphaeroides with better product quality.

外文关键词：

Radio frequencyHot water pasteurizationNostoc sphaeroides:Temperature uniformityPhycocyanin stability

作者：

Xu, Jicheng、Zhu, Shengnan、Zhang, Min、Cao, Ping、Adhikari, Benu

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作者单位：

Jiangnan Univ, State Key Lab Food Sci & Technol, Wuxi 214122, Jiangsu, Peoples R China

Anhui Polytech Univ, Coll Biol & Food Engn, Wuhu 241000, Anhui, Peoples R China

Astronaut Ctr China, Key Lab Aerosp Med & Food Engn, Beijing 100048, Peoples R China

RMIT Univ, Sch Sci, Melbourne, Vic 3083, Australia

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出版年：

2021

DOI：

10.1016/j.lwt.2021.110880

LWT-Food Science & Technology

ISSN：0023-6438

年,卷(期)：2021.141

被引量11
参考文献量32