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ID 41430
file
title alternative
Application of Supersonic Waves to Foods
creator
Utsunomiya, Yasuaki
Kosaka, Yasuharu
NDC
Medical sciences
abstract
生理食塩水中に浮遊させたヒト由来のEscherichia coliに周波数700KHzの超音波を作用させたところ,試料の初期温度28~32℃のとき10分間照射で生残率0.83%,30分間照射で0.2%であった。 しかし初期温度17℃のときは,10分間で37.86%,30分間照射で8.1%であった。

市販の牛乳中に同種の菌を浮遊させたものについては超音波照射によって菌数の変化は殆んど見られなかった。

みかん果汁10%入りの市販の清涼飲料水の場合にはpH2.6のとき30分照射で初期温度32℃のとき生残率0.3%,18℃のとき同じく1.3%,pH5.6のときは32℃でかなり効果が低かった。
abstract
Escherichia coli, physiological saline suspensions, were exposed to supersonic waves of 700 KHz frequency. After the 10 minutes of exposure, in case of 28°C~32°C in initial temperature, the survivability was 0.83% and after 30 min. it was 0.2%. But at 17°C in initial temperature, after 10 minutes exposure we had 37.86%, and after 30 min., 8.1%. However, in the case of the commercialized milk suspension instead of physiological saline, supersonic waves exposure didn’t show almost any pasteurization effect. In the case of a commercialized cooling drink containing 10% of orange juice when the supersonic waves exposure was kept on for 30 minutes at an initial temperature of 32°C, the survivability was 0.3% at pH of 2.6, but the effect was insignificant at pH of 5.6.
journal title
Journal of the Faculty of Applied Biological Science, Hiroshima University
volume
Volume 18
issue
Issue 2
start page
225
end page
231
date of issued
1979-12-25
publisher
広島大学生物生産学部
issn
0387-7647
ncid
naid
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Biosphere Science
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