Preserving Banana Quality: The Role of Modified Atmosphere Packaging (MAP)

Modified Atmosphere Packaging (MAP) plays a crucial role in influencing the flavor and texture of bananas by delaying the ripening process and extending their shelf life.

Flavor: The controlled environment in MAP preserves the natural sweetness of bananas by slowing down the conversion of starches into sugars. As a result, bananas stored in MAP maintain their flavor profile longer, preventing them from becoming overly sweet or developing undesirable off-flavors associated with over-ripening. However, if oxygen levels are too low, anaerobic respiration can occur, leading to off-flavors.

Texture: MAP helps retain the firmness of bananas by slowing the softening process. The reduced oxygen and increased carbon dioxide levels in MAP inhibit enzymatic activities that cause softening, allowing bananas to stay firmer for longer. This is particularly advantageous for transportation and storage. However, an imbalance in gas levels can cause issues like uneven ripening or excessive firmness.

In summary, MAP is an effective method for preserving the quality of bananas, ensuring they remain flavorful and firm over extended periods. This makes it a valuable tool for reducing waste and enhancing the efficiency of banana supply chains.
Preserving Banana Quality: The Role of Modified Atmosphere Packaging (MAP)

History of modified atmosphere packaging (MAP)

Modified atmosphere packaging can be defined as an alteration in the composition of gases in and around fresh produce by respiration and transpiration when such commodities are sealed in plastic films.

Much of original work was done in Australia and New Zealand when beef and lamb carcasses were shipped in the 1930s to the UK was stored in carbon dioxide to help maintain freshness.

During the 1940s and 1950s fresh apples and pears were placed in enclosed warehouse. The natural respiratory activities of the fruit reduced the oxygen and increased the carbon dioxide within storage areas sufficiently to slow respiration markedly.

The stored apples or pears could be consumed as much as six months after the original harvest: and extensions of about double the normal chilled storage shelf-life.

In the 1970s, modified atmosphere packages were used for some retail packs of meat and fish. The new techniques have been developed, including micro-perforation, anti-fogging layers to improve product visibility.

The use of modified atmosphere packaging technology received a significant boost when the retail chain of Marks and Spencer introduced a wide range of fresh MAD meat products in the UK in 1981.

Today, modified atmosphere packaging is used to package anything from fresh salads or individual meat portions, to sandwiches and snacks.

History of modified atmosphere packaging (MAP)

Packaging of cottage cheese

Traditional packaging of processed cheese consisted of triangular portions packaged in tinfoil (97% tin, 3% antimony and traces of lead, copper and iron) because of its resistance to corrosion by processing salts.

In case of cottage cheese, it has a very short shelf-life of about 21-28 days under even proper refrigerated conditions. The primary cause of spoilage is the growth of psychrotrophs and Gram-negative bacteria, which results in the production of undesirable flavors and turns the curd slimy.

Modified atmosphere packaging has been applied to successfully prolong the shelf-life of cottage cheese and improve the shelf—life of sliced and shredded cheeses.

The shelf-life of cottage cheese, without chemical preservatives, stored at 3-4 °C is about 14-21 days. Flushing the headspace (25%) of commercial packages of cottage cheese with pure CO2 extended the shelf-life at 8 °C without altering the sensory properties or causing any other negative effects.
Packaging of cottage cheese