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(b) A Food material containing Bacillus stearothermophilus PS1518 as an indicator organism ts subjected to heat sterilization at 121 C. Calculate the time required to reduce the organism to one tenth of the original number. Fo value for the organism is 4 minutes and the decimal reduction time , D, at 116°C is 40 minutes. Assume operation is at constant temperature of 121°C. HINT Fo = -To 10 dt Where Fo = equivalent exposure time at 121°C of the actual exposure time at a variable temperature To = the reference temperature =121 C, z=10 = number ofC necessary for10fold increase in F

(b) A Food material containing Bacillus stearothermophilus PS1518 as an indicator organism ts subjected to heat sterilization at 121 C. Calculate the time required to reduce the organism to one tenth of the original number. Fo value for the organism is 4 minutes and the decimal reduction time , D, at 116°C is 40 minutes. Assume operation is at constant temperature of 121°C. HINT Fo = -To 10 dt Where Fo = equivalent exposure time at 121°C of the actual exposure time at a variable temperature To = the reference temperature =121 C, z=10 = number ofC necessary for10fold increase in F

Basic Clinical Laboratory Techniques 6E
Basic Clinical Laboratory Techniques 6E
6th Edition
ISBN:9781133893943
Author:ESTRIDGE
Publisher:ESTRIDGE
Chapter1: The Clinical Laboratory
Section1.8: Laboratory Math And Reagent Preparation
Problem 14RQ
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(b) A Food material containing Bacillus stearothermophilus PS1518 as an indicator organism ts subjected to heat sterilization at 121 C. Calculate the time required to reduce the organism to one tenth of the original number. Fo value for the organism is 4 minutes and the decimal reduction time , D, at 116°C is 40 minutes. Assume operation is at constant temperature of 121°C. HINT Fo = -To 10 dt Where Fo = equivalent exposure time at 121°C of the actual exposure time at a variable temperature To = the reference temperature =121 C, z=10 = number ofC necessary for10fold increase in F
Transcribed Image Text:(b) A Food material containing Bacillus stearothermophilus PS1518 as an indicator organism ts subjected to heat sterilization at 121 C. Calculate the time required to reduce the organism to one tenth of the original number. Fo value for the organism is 4 minutes and the decimal reduction time , D, at 116°C is 40 minutes. Assume operation is at constant temperature of 121°C. HINT Fo = -To 10 dt Where Fo = equivalent exposure time at 121°C of the actual exposure time at a variable temperature To = the reference temperature =121 C, z=10 = number ofC necessary for10fold increase in F
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