International Journal of Biochemistry Research & Review, ISSN: 2231-086X,Vol.: 18, Issue.: 4
Effect of Storage Temperature on the Nutritional Compositions of Lactic Acid Bacteria Fermented Spicy Tigernut- Milk Drink
N. Maduka1* and F. S. Ire1 1Department of Microbiology, University of Port Harcourt, Nigeria.
N. Maduka1* and F. S. Ire1
1Department of Microbiology, University of Port Harcourt, Nigeria.
(1) Kuo-Wei Lin, Department of Food and Nutrition, Providence University, Taiwan.
(1) R. Prabha, Animal and Fisheries Sciences University, Hebbal, India.
(2) Paul Yahaya Idakwo, University of Maiduguri, Nigeria.
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The fundamental benefit for consuming edible products is based on its nutritional compositions. Several factors affect the nutritional composition of diverse edible products. This study was carried out between August-October, 2016 at Federal Institute of Industrial Research Oshodi (FIIRO), Lagos. Lactic acid bacteria (LAB) were isolated from ‘ogi’ using MRS agar and characterized using API 50 CHL test kit. Tigernut tubers were used to prepare tigernut-milk which was fermented by mixed culture of LAB for 12 hr at 45 oC. The LAB fermented tigernut-milk drink was separately spiced with 3 % (w/v) ginger, 5 % (w/v) ginger, 3 % (w/v) garlic and 5 % (w/v) garlic. The final products were stored at 28±2 oC and 4±2 oC for 12 wks and their nutritional composition was monitored at 4 wk interval using conventional and rapid test methods. Results obtained revealed there was reduction in carbohydrate, moisture and lipid content during storage of the tigernut-milk preparations. Importantly, the protein content in the tigernut-milk preparations increased during storage at both conditions except in the 5 % (w/v) ginger spiced tigernut-milk drink which ranged from (6.48-11.24 %) and (6.07-10.91 %) during ambient and refrigeration temperature storage, respectively. There was also reduction in Ca, K, Mg and Zn content in the tigernut-milk drink preparations during storage at 28±2 oC and 4±2 oC. Generally, the mineral content of spiced tigernut-milk drink preparations stored at 4±2 oC was higher than similar drink stored at 28±2 oC with very few exceptions. Remarkably, the high potassium content in 3 % (w/v) ginger and 3 % (w/v) garlic spiced tigernut-milk could be more effective in prevention of hypertension and artherosclerosis compared with 5 % (w/v) ginger spiced and 5 % (w/v) garlic spiced tigernut-milk drink. Therefore, this study projects tigernut-milk drink fermented by LAB and separately spiced with 3 % (w/v) ginger and 3 % (w/v) garlic as a nutritious drink to be preferably stored at refrigeration temperature.
Tigernut-milk; lactic acid bacteria; nutritional composition; flavouring agent; fermented.
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