Efficiency of Locally Available Spices to Improve Shelf Life and Sensory Attributes of Teff Injera
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Injera is one of the fermented foods that is made from different cereals, including sorghum, teff, maize, wheat, barley, or a combination of some of these cereals. Despite the fact that injera is a favorite staple food, mould spoilage caused by Aspergillus, Penicillium, Mucur and Rhizopus spps is a serious problem that affects the shelf life of injera, the staple Ethiopian fermented bread. There were no reports on the efficiency of spices on shelf life and sensory attributes of any of the traditional Ethiopian fermented foods especially in teff injera. Therefore, this study was carried out to evaluate the efficiency of locally available spices to enhance the shelf life and sensory attributes of teff injera. Isolation and identification of fungi that spoiled injera was carried out by standard procedures. The efficiency of spices to increase shelf life of injera was evaluated in vivo and sensory attributes of preserved injera was evaluated by 30 panelists. The results revealed that four types of fungal species belonging to the genera of Penicillium, Aspergillus, Rhizopus and Mucur species were isolated from spoiled teff injera. Teff injera containing powder and water extract of 2% N. sativa were the most preferred in terms of taste with mean rating of 6.9; ethanol extracts of 2% N. sativa was the most preferred in terms of colour and allover acceptance with mean rating of 6.9and 6.93 respectively. On the basis of the current findings, tested spices could be a good candidate to improve the shelf life and sensory attributes of teff injera. Therefore, further studies are needed to study their toxicology and isolate the bio-active components responsible for shelf life and sensory improvement from these plants.
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