Posted May 19, 2016 by admin in Natural Resource Management | 286 Total Views
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HEAD OF RESEARCH TEAM : Dr. Ramadhani Eka Putra
TEAM MEMBERS : Dr. Indra Wibowo, Dr. Ahmad Faizal, Dr. Ida Kinasih
OFFICIAL ADDRESS : School of Life Sciences and Technology, Institut Teknologi Bandungg
Post harvest lost is one of major problems of Indonesia Agriculture. Approximately about 30-50% of agriculture product is discard due to loss of weight and quality. Hot and humid climate of Indonesia also enhance the loss rate and reduce product shelf life. There are two major concern about this condition, (1) loss of farmer during peak season as they unable to store their product for better price and (2) disparation of nutrition in Indonesia as some high nutrituous agricultural product will be loss before reaching remote area without access of good infrastructure and transportation.
Generally, low temperature storage is used to reduce the rate of respiration and thermal decomposition for extending storage life of agricultural products. However, the prolonged storage at low temperature causes chilling injury and also contraction of the skin occurs as water from the skin of the products (usually fruit) moves into the pulp which lowers down the taste and also damages the fruit physiology. While energy cost of low temperature storage also caused significant economic cost for many regions in Indonesia. Controlled atmosphere and hypobaric storage techniques are also useful in extending the shelf-life of tomatoes but these are very expensive to run on a commercial scale. Thus, edible coatings based on natural products can provide an additional protection for fresh fruit and vegetables and be complementary to low temperature, controlled atmosphere and hypobaric storage techniques. Appropriate formulations of an edible coating may provide an excellent barrier against gaseous exchange and water loss which are detrimental to postharvest quality.
In this study, propolis which produced by stingless bee Trigona sp., whose apply as pollination agent, apply as edible biocoating for some local agricultural products, i.e. eggs, tomatoes, bananas, oranges, and strawberry.
During this study, application of propolis showed great prospect as antibacterial during application to egg. Application also maintained shelf life of eggs eventhough not significantly increase shelf life when egg stored at high temperature and humidity condition. On the other hand, research on tomatoes, strawberry, oranges, and bananas showed application of this material increase shelf life especially by preventing growth of mold and bacteria.
One of major obstacle for application of propolis is the amount of propolis required for coating. Based on this problem, during this study we develop another type of nanoemulsion propolis which reduce number of raw propolis required. Cellular study showed their ability to infiltrate cell wall made it possible to create local fruit with high antioxidant content. However, further test needed for determine the effectiveness of this material for improve shelf life and posible improving value of local fruits.