Impact of factors affecting the efficacy of intense pulsed light for reducing Bacillus subtilis spores

被引：7

作者：

Hwang, Hee-Jeong ^{[1
]}

Kim, Gyu-A. ^{[2
]}

Chung, Myong-Soo ^{[2
]}

机构：

[1] Dongguk Univ, Res Inst Biotechnol & Med Converged Sci, Goyang 10326, South Korea

[2] Ewha Womans Univ, Dept Food Sci & Engn, Seoul 03760, South Korea

来源：

FOOD SCIENCE AND BIOTECHNOLOGY | 2021年 / 30卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

Intense pulsed light (IPL); Bacillus subtilis; Spore; Pulse width; Optimal condition; MICROBIAL INACTIVATION; STAPHYLOCOCCUS-AUREUS; UV-LIGHT; RESISTANCE; DECONTAMINATION; MICROORGANISMS; ENDOSPORES; PARAMETERS; KINETICS; BACTERIA;

D O I：

10.1007/s10068-021-00971-3

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

This study investigated how the following four intense pulsed light (IPL) treatment factors affect the inactivation of Bacillus subtilis (KCCM 11,315) spores: distance between the sample and IPL lamp (8, 13, and 18 cm), pulse width (0.5, 1.3, and 2.1 ms), charging voltage (1000, 1200, and 1400 V), and processing time (10, 20, and 30 s). The results showed that all four factors considerably influenced the spore inactivation rate in different ways. Excluding processing time, which does not affect the pulse itself, the effect was largest for pulse width, followed by distance, and charging voltage. The optimal treatment condition that maximized the inactivation rate was a distance of 8 cm, a pulse width of 2.1 ms, a charging voltage of 1000 V, and a processing time of 30 s, which together produced a 6 log reduction. It revealed that individual factors need to be investigated together for achieving the optimal condition of IPL.

引用

页码：1321 / 1329

页数：9

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