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Maple Sirup. XXI. The Effect of Temperature and Formaldehyde on the Growth of Pseudomonas geniculata in Maple Sap
Author(s) -
WASSERMAN AARON E.,
WILLITS C. O.
Publication year - 1963
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1963.tb00173.x
Subject(s) - maple , formaldehyde , inoculation , bacterial growth , pseudomonas , biology , bacteria , lag time , horticulture , chemistry , botany , microbiology and biotechnology , biochemistry , genetics , biological system
SUMMARY The growth of Pseudonmonas geniculata in sterile maple sap in the presence and absence of 5 ppm formaldehyde at several temperatures was investigated. At 27°C, the growth of inocula as low as 10 3 cells/ml was rapid, and the effect of formaldehyde, if any, was negligible. At 7°C, the temperature slowed the growth of the bacteria, particularly in cultures inoculated with 10 3 or 10 4 cells/ml. Formaldehyde further inhibited the cultures, initially causing a decrease in the number of viable organisms and lengthening the lag period before growth began again. This was particularly noticeable in the cultures with the smaller inocula.