Taro (Colocasia esculenta cv fouê) corm was subjected to different boiling times and the changes in chemical composition and physico-functional properties were investigated using standard method. The change in boiling time led to a significant (P < 0.05) reduction in the moisture, reducing sugars, total sugars, crude fat, crude fibre, total phenolic compound contents and iodine affinity of starch, whereas the total carbohydrate content, water absorption capacity, water solubility index, paste clarity and foam capacity increased significantly (p < 0.05). The crude protein and total ash contents of the flours from taro corm were not affected significantly (p < 0.05) by the change in boiling time. Taro corm flours exhibited highest total carbohydrate, crude fibre, total ash contents, water absorption capacity, iodine affinity of starch and lowest crude protein and fat contents, foaming capacity and water solubility index. Principal component analysis showed that flours from taro corm boiled during 20 min and 15 min were located at the left of the score plot, while flours from raw and boiled taro corm during 10 min had a large positive score in the first principal component.
In Côte d'Ivoire, malnutrition is still a public health problem. To remedy this, international institutions involved in this fight recommend the promotion of local resources rich in proteins such as insects and caterpillars. Thus, this study aims to enhance the enrichment of sorghum tôh with shea caterpillar flour (Cirina butyrospermie) in order to solve the problems of malnutrition. To do so, 25 young rats of Wistar strain, aged to 50±05 days with an average weight between 45 and 55±5 g were divided into 5 batches were fed respectively with tôh formulated with 5%, 10% and 15% of shea caterpillar flour during 15 days. At the end of this period, the nutritional parameters were calculated and biometric study was conducted to evaluate the impact of enriched food on well-being of young rats. The results obtained reveal interesting nutritional potentialities in most parameters. For example, the weight gains obtained varied from 4.86±0.45 g/d to 6.05±0.39 g/d in to rats fed with different formulations of tôh enriched with shea caterpillar flour and the diet STScF2 did not show any significant difference with control diet. In terms of biological value, values obtained vary from 84.12% to 90.64% while those of protein retention vary from 11.66±1.85 g to 12.99±0.89 g respectively for young rat fed with diets STScF3 and STScF1. Concerning biometric study, no abnormality was noted following the consumption of these foods. In view of the nutritional potential developed by young rats, the tôh enriched with 10% shea caterpillar four, could be retained to solve malnutrition problems.
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