Outlines of dairy bacteriology, 10th edition: A concise manual for the use of students in dairyingRussell, H. L. (Harry Luman)
Science
Outlines of dairy bacteriology, 10th edition: A concise manual for the use of students in dairying
Russell, H. L. (Harry Luman)
Dairy microbiology
=Camembert cheese.= A typical example of soft cheese is one of the
French types, known as Camembert. This cheese is prepared from cow's
milk which is curdled by rennet. The curd is not cut but is dipped
into the forms, which condition, taken with the absence of pressure
in forming the cheese, accounts for the large quantity of whey in
it. The finished cheese are about one inch in thickness and three
inches in diameter. In the ripening, the moisture and temperature of
the curing room are very carefully regulated.
The first stage in the ripening is due to the rennet and the lactic
bacteria. Later there appears on the surface of the moist cheese, a
moldy growth. In this, there are at least two kinds of molds, the
ordinary mold that appears on sour milk, _Oidium lactis_, and
another that is related to the bread mold but which has a white
instead of a green fruiting stage. These molds are confined to the
surface of the cheese but the enzymes which they produce diffuse
into the substance, changing the color from a dull, opaque white to
a translucent yellow. The acid that has been formed by the lactic
bacteria is gradually used up by the growth of the mold, and
conditions then become favorable for the growth of putrefactive
bacteria which digest the curd. The cheese is ready for use when the
action of the mold has penetrated to the center of the cheese, and
before any pronounced putrefaction has taken place. The production
of the typical flavor is dependent upon there being a definite
relation between the growth of the molds and bacteria. This relation
is dependent largely upon the moisture and temperature of the curing
room. These cannot always be regulated with exactness; and hence,
much of this type of cheese is not of first quality, and must be
sold for a low price. While such fancy cheeses, as Camembert, bring
fifty cents and upward per pound, and the yield from the milk is
much greater than with the hard type of cheese, yet the difficulties
of successful manufacture are such as to make success less easily
attained than with the other types.
There are many other kinds of soft cheese that depend for their
ripening upon factors similar to those concerned in the ripening of
Camembert; most of them are, however, of small importance from a
commercial standpoint.
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