Modeling the effect of ethanol vapor on the germination time of Penicillium chrysogenum

The influence of ethanol vapor on germination of Penicillium chrysogenum was determined on yeast nitrogen base plus glucose agar medium at 25 degrees C. Ethanol vapors were generated by 0 to 6% (wt/wt) ethanol solutions at the bottom of hermetically closed petri dishes. The logistic equation was use...

Full description

Saved in:
Bibliographic Details
Published in:Journal of food protection 2005-06, Vol.68 (6), p.1203-1207
Main Authors: DANTIGNY, Philippe, TCHOBANOV, Iavor, BENSOUSSAN, Maurice, ZWIETERING, Marcel H
Format: Article
Language:English
Subjects:
Biological and medical sciences
bread
clostridium-botulinum
conidial germination
Dose-Response Relationship, Drug
Ethanol - pharmacology
Food industries
Food Microbiology
Food Preservation - methods
Fundamental and applied biological sciences. Psychology
growth-rate
Kinetics
Logistic Models
Models, Biological
Penicillium chrysogenum
Penicillium chrysogenum - drug effects
Penicillium chrysogenum - growth & development
shelf-life extension
spoilage
Spores, Fungal - growth & development
temperature
Time Factors
water activity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The influence of ethanol vapor on germination of Penicillium chrysogenum was determined on yeast nitrogen base plus glucose agar medium at 25 degrees C. Ethanol vapors were generated by 0 to 6% (wt/wt) ethanol solutions at the bottom of hermetically closed petri dishes. The logistic equation was used to describe the data as the percentage of germination versus time and to estimate the germination time. The effect of ethanol concentration on germination time was described by a new reparameterized equation, resulting in an estimated limiting ethanol concentration of 4.3%. Up to 3% ethanol, all spores germinated, and the germination time increased with increasing ethanol concentration. At 3.5 and 4%, some spores formed abnormal germ tubes and others were inhibited at the swelling stage. The inhibiting effect of ethanol was reversible under these experimental conditions.
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-68.6.1203