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Heated Canned Foods

Heated Canned Foods
Medium acid foods with a pH between 5.3 and 4.5 are likely to undergo

flat sour spoilage
both (a) and (b)
putrefaction
TA spoilage

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Heated Canned Foods
The most important kind of chemical spoilage of canned foods is the hydrogen swell which is favored by

increasing temperature of storage
increasing acidities of foods
all of these
imperfection in the tinning and lacquering

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Heated Canned Foods
The ability of B. coagulans to grow in tomato juice depends upon the

number of spores present
the pH of the juice
all of these
the availability of oxygen

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Heated Canned Foods
The putrifactive anaerobes grow best in the

low acid canned foods
medium acid canned foods
any of these
high acid canned foods

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Heated Canned Foods
The immediate source of the flat sour bacteria is usually the

soil
plant equipment
sugar
starch

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Heated Canned Foods
High acid foods with a pH < 3.7 undergo spoilage by

B. coagulans
both (a) and (b)
do not undergo spoilage by microorganisms
Saccharolytic anaerobe

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