Development of Value Added Products from Nelli (Phyllanthus Emblica) and Their Quality Evaluation
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Date
2014
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Uva Wellassa University of Sri Lanka
Abstract
Nelli (Phyllanthus emblica) is one of the underutilized, seasonal fruit crops which contains higher amount of vitamin C as well as other vitamins and minerals. However, due to lack of awareness on its nutritional composition, astringent and bitter taste of the fruit, usage of it for developing food products is at low level. Therefore, this study was conducted to develop value added products from nelli. Nelli powder incorporated instant rasam mixture was prepared by mixing 30 % (w/w) of nelli powder with 70% (w/w) of dehydrated powders of the usual ingredients of traditional rasam. For select that ingredient combination, preliminary studies and several sensory evaluations were carried out. Sensory evaluations were carried out using 9-point hedonic scale by 30 panelists and considered sensory parameters were aroma, taste, color and overall acceptability. Developed product was packed in metalized film pouches. Storage life of the product was evaluated up to 2 months at ambient temperature. Proximate analysis was done and resulted values for moisture, total fat, crude fiber, total ash and crude
protein contents were 5.33±0.03%, 2.17±0.23%, 8.52±0.18%, 3.18±0.06%,
9.17±0.65% respectively. As the main constituent presence in nelli, ascorbic acid content was determined and it was significantly reduced (p<0.05) during the ,stbrage period. According to the microbiological results product was microbiologically safe for consumption up to 2 months of storage period. As second experiment, preserved nelli in glucose syrup series were developed. Preliminary studies were conducted to select suitable TSS values of glucose syrup and selected values were 35°,40° and 45° respectively. Pretreatment was carried out to reduce the bitterness of the fruit. Physiochemical and microbial properties were determined within the 5 weeks of storage period. Ascorbic acid content was significantly reduced (p<0.05) during the storage period. Significant amount of microorganisms were not reported during the storage period of 5 weeks. Sensory evaluation was carried out using 9-point hedonic scale by 30 panelists to select the most acceptable one and product with initial TSS value of 45° was selected as the best one. Considered sensory parameters were texture, appearance, color, aroma, taste and overall acceptability. Sensory data of both products were analyzed by Friedman test using MINITAB 18 statistical software. This study encouraged to the development of different value added products from nelli.
Key words: Nelli, Rasam, Sensory, Ascorbic acid
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Export Agriculture Degree Programme (EAG)