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Sterilization is a process to achieve a bacterial free environment. This can be done in different ways. The most effective technique is autoclaving. In this technique the material to be sterilized is treated with steam (temperature at 121 degree Centigrade) under pressure (10-15 pounds/square inch), that will kill all forms of microbe.
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What are the growth requirements for microorganisms?
They need food. But don't feed them after midnight.
What conditions are needed for the growth of microorganisms esp fungal infections?
Warmth, food and moisture.
Preservatives such as citric acid are added to foods to interfere with bacterial growth This creates an acidic pH in the food Why does this affect the bacteria that are present?
An acidic environment causes bacterial enzymes to fail or work less efficiently.
Does lights with coloured cellophane affect the growth of food?
Yes.
How does sugar preserve food?
Sugar preserves food by lowering the water activity (aw). If the aw is 85 or less, spoilage and pathogenic microorganisms can't grow. Microorganisms all need proper food, water, temperature and acidity to grow and adding sugar to appropriate levels can prevent bacterial growth.
What Four factors which affect the growth of microorganisms?
Four factors which affect the growth of microorganisms are: temperature food source for microorganisms (ie. sugar, protein, fat) the amount of microorganisms introduced to the food source ph of the food source
What is the purpose of preservation?
to destroy microorganisms in food by heating and preventing recontaminating by microorganisms from outside to alter the environment so as to prevent or retard growth of undesirable microorganisms. this can be achieved by removing available water from the food, reducing temperature, addition of preservatives, altering the gas composition, etc.
What is the purpose of food preservatives?
to minimize the growth of micro-oorganismms
What are the effects of preservatives?
Preservatives slow down spoilage of food. Preservatives can prevent or slow microbial growth, prevent or slow the action of degrading enzymes, and slow down other negative reactions in food.
What are the growth requirements for microorganisms?
They need food. But don't feed them after midnight.
What conditions are needed for the growth of microorganisms esp fungal infections?
Warmth, food and moisture.
Preservatives such as citric acid are added to foods to interfere with bacterial growth This creates an acidic pH in the food Why does this affect the bacteria that are present?
An acidic environment causes bacterial enzymes to fail or work less efficiently.
How does cumin get spoilt?
Cumin does not possess the bacteria inhibiting properties necessary to be used as a food preservative. The most commonly used natural food preservatives are: sugar, salt and vinegar. All of these preservatives will help to retard the growth of the bacteria that causes food to spoil.
Where do you buy preservatives?
You can buy natural food preservatives from Global Natural Food Preservatives Suppliers. You can type in food additives in the internet and it will bring up suppliers of chemical preservatives. Think carefully before adding preservatives to any food.
How does food affect plant?
it increases its growth
How do cells affect growth?
Cells affect growth by supporting the system with food and water. The more food and water a cell takes in the more they grow.
What is the function of potassium sorbate?
Potassium Sorbate is a potassium salt version of sorbic acid. Sorbic acid is a polyunsaturated fat used to inhibit mold growth.(used for over 80 years as a food preservative). Potassium benzoate is added as preservatives. It maintains the freshness of the product through its shelf life and inhibits the growth of microorganisms. It also helps maintain the proper pH. Similar to vinegar, salt or other natural preservatives, is safe as determined by the US Food and Drug Administration (FDA) and is listed on the Generally Recognized as Safe (GRAS) list. From protexinternational.com
