Applications Bacteria Science Project

Benefits and Applications of Bacteria Science Project - How bacteria are useful in other ways

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Butter made from sweet cream lacks the pleasant taste of sour cream butter.This is because in the ripening of cream bacteria have been growing in it, and these produce the flavor which we enjoy in butter.That the especial bacteria which produce the desirable taste may be present, the cream may be inoculated with a pure culture or a starter, such as a small quantity of cream known to have developed the desired flavor.Frequently the desirable kinds of bacteria become domesticated in a dairy and good butter is produced without any effort on the part of the butter maker to bring about their introduction.

Likewise the flavor of cheese (and even yogourt!) is produced by bacteria or molds, the different flavors being produced by different kinds of organisms.The ripening of cheese is a much more complicated process than the ripening of butter, since it depends upon the successive activity of different groups of bacteria or molds as well as upon the presence at the right time of suitable aroma-producing species.The holes in certain cheeses are produced by gas formed as a result of the action of particular bacteria.

The action of bacteria is important in the tanning of skins for the production of leather; in the curing of tobacco ; in the process of obtaining linen fiber from flax ; and in the manufacture of vinegar.The "mother of vinegar with which most of us are familiar is made up of a great mass of bacteria which have the power to change the alcohol of the wine or cider into the vinegar acid (acetic acid).The action of these vinegar-forming bacteria is hastened by free access of air, so that barrels containing cider to be changed into vinegar should be only partially filled and an opening should be left in the top of the barrel to admit air.The formation of vinegar may be hastened by permitting the cider to trickle through casks filled with shavings impregnated with old vinegar.Why ?

You can make several science projects on bacterial applications by examining:

1) Why different cheeses taste different? Which bacterial cultures are used with which cheeses?

2) Why different yogourts taste different?Which bacterial cultures are used with which yogourts?

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