STUDY OF SUBSTANCES RELEASED BY ULTRASONIC TREATMENT FROM BACILLUS-STEAROTHERMOPHILUS SPORES

被引：28
|
作者：
PALACIOS, P
BURGOS, J
HOZ, L
SANZ, B
ORDONEZ, JA
机构：
[1] UNIV COMPLUTENSE MADRID, FAC VET, DEPT HIGIENE & TECNOL ALIMENTOS, E-28040 MADRID, SPAIN
[2] UNIV SARAGOSSA, FAC VET, DEPT PROD ANIM & CIENCIA ALIMENTOS, ZARAGOZA, SPAIN
来源：
JOURNAL OF APPLIED BACTERIOLOGY | 1991年 / 71卷 / 05期
关键词：
D O I：
10.1111/j.1365-2672.1991.tb03815.x
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Spore heat resistance is reduced when combined ultrasonic and heat treatments are applied. To explain this phenomenon the substances released from Bacillus stearothermophilus spores to the surrounding aqueous medium by the ultrasonic treatment (20 kHz, 120 W, 12-degrees-C, 30 min) were studied. Calcium, dipicolinic acid and a glycopeptide of 7 kDa molecular weight were detected in the ultrasonicated medium. Fatty acids, acyl glycerols and glycolipids (but no phospholipids) were also released. The decrease of heat resistance induced by the ultrasonic treatment was attributed to the release of low molecular weight substances from the spore protoplast with consequent modification of its hydration state.
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页码：445 / 451
页数：7
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