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For the most part, Molds are obligate aerobes. This means that they require oxygen (not specifically "air") to complete their metabolism.
However, many molds have the ability to reproduce (grow) at very low concentrations of oxygen gas. Organisms which are obligately anaerobic can not grow in the presence of oxygen. An example of an obligate anaerobe is the bacterium Clostridium botulinum. Examples of obligately aerobic microorganisms include molds and Pseudomonas species of bacteria (the bacterium which causes your lunch meat to get slimy).
Other types of microorganisms can grow both in the presence or absence of oxygen gas. These organisms are classified as facultatively anaerobic. Examples include yeast, Salmonella, and Escherichia coli.
It is very difficult to remove all of the oxygen from a chamber (bread box). Most vacuum packaging can only reduce the oxygen concentration to approximately 0.5%. This is still enough oxygen for some molds to grow. We rarely see moldy soda because there is no oxygen in the can. The atmosphere has been replaced with carbon dioxide. Some food manufacturers have used this information to package foods for longer shelf life in what is called modified atmosphere packaging (MAP). This is a situation where all of the air is removed and the atmosphere is replaced with a specific concentration of gas such as CO2, N and H2 (carbon dioxide, nitrogen or hydrogen gas). What you have suggested is what the French refer to as sous-vide (under vacuum). If you had an airtight container and a 2-way valve you could remove as much air as possible with your pump. If you had an oxygen scavenger or could introduce a neutral gas such as CO2 then you might be able to reduce the oxygen content low enough to inhibit mold.
What else can I help you with?
What kind of bacteria that can survive in the refrigerator?
Some examples of bacteria that can survive in the refrigerator include Listeria monocytogenes and Yersinia enterocolitica. It is important to practice proper food handling and storage techniques to prevent bacterial growth in refrigerated foods.
Do all bacteria must use oxygen to break down food and energy?
Some bacteria need oxygen to survive, while others would find it poisonous. Bacteria that need oxygen to survive are commonly referred to as aerobic bacteria while bacteria that does not require oxygen are anaerobic. There are also bacteria that are classified as facultative anaerobes, this type of bacteria do not require oxygen to survive but prefer to have it.
What happens to bacteria in a refrigerator?
they become unable to multiply. unlike humans, all bacteria are different and have varied temperatures at which they function best. just think of food in general--while putting your food in the fridge can limit the growth of bacteria for a short period of time (that's why we put food in the fridge), it will not prevent some bacteria from eventually growing (which is why food spoils even when it is kept in the fridge). even in extremely low temperatures (like the freezer), some bacteria will be able to grow--it all depends on the temperatures at which the bacteria function best.
Why do bacteria need water to grow?
Bacteria require water for several key physiological processes, including nutrient uptake, metabolism, and cellular respiration. Water is essential for the movement of molecules within the cell and the maintenance of cell structure. Without water, bacteria would not be able to grow and reproduce effectively.
How can osmosis preserve food?
by packing food with a lot of salt, osmosis is being used to keep bacteria out of the food. If bacteria land on food with a high salt content, then the salt will suck moisture out of the bacteria via osmosis and the bacteria will die. This is not true for halophiles (bacteria that tend to enjoy being in high salt content), but it is true for many bacteria. This is why, before a good understanding of micro-organisms was developed, people noticed that food could be preserved with salt and this was known as "curing" the food.
How does tinning food preserve it?
Because most bacteria can't survive in extreme heat, once the food inside sealed cans reaches a certain temperature, the bacteria dies, and an enclosed, sterile environment is created.
Give the example of food preservation?
Pour Salt, kill the air Decrease bacteria Pour Salt, kill the air Decrease bacteria
Why can dehydrated food be stored for a long time without worry of it being contaminated by bacteria?
Dehydrating food removes moisture, which is essential for bacteria to grow. Without moisture, bacteria cannot thrive and spoil the food, allowing dehydrated food to have a longer shelf life. Additionally, packaging dehydrated food in airtight containers further prevents bacterial contamination.
What happens to bacteria in frozen food?
The bacteria in frozen food die. This is because bacteria need food, water, and a warm temperature in order to survive.
Will cats eat food that is infested with ants?
Yes, cats may eat food that is infested with ants, but it is not recommended as it can be harmful to their health. Ants may carry bacteria or toxins that can make cats sick if ingested. It is best to keep cat food in sealed containers to prevent infestations.
Why are shallow containers best for refrigerating food?
Food that needs refrigeration should be cooled as rapidly as possible and held at that temperature. Shallow containers allow food to cool quickly, lowering the chances for bacteria to grow.
Why does bacteria eat food?
For the same reason that you do; to gain food (substenance) and energy with which to survive.
How does a can keep food from spoiling?
Food is spoiled by living things such as bacteria and molds. They ruin your food when they eat it. The food inside a can is heated to kill the bacteria and molds. Then each can is sealed to keep any more from getting in.
Does chocolate last longer in different containers?
Chocolate should last longer in better-sealed, airtight containers, much like any other food. Keeping chocolate in a sealed tin should extend the freshness much longer than bar left out in the open.
What are six things bacteria need to survive?
There are 3 Main Things: Moisture, Warmth, and a source of food
How does tinning food kill bacteria?
Tinning food involves sealing it in a can and then heating it to a high temperature to kill bacteria. The heat destroys the bacteria by denaturing proteins and damaging cell structures, preventing them from growing and spoiling the food. Additionally, the sealed can prevents new bacteria from entering and contaminating the food.
Why don't bacteria help preserve canned food?
nope i dont think so Bacteria decompose organic matter, like food, to gain energy from it. If the food is sealed in a can, bacteria cannot reach it and so cannot decompose it (cause it to rot).
