Research Article
Volume 15 Issue 11 - 2020
Effect of Ethanolic Extracts from Fruit By-Products on Inhibition of Melanosis in Iced White-Leg Shrimps (Litopenaeus vannamei)
Tuan Q Dang* and Tuan M Nguyen
Department of Food Technology, International University (VNU-HCMC), Ho Chi Minh City, Vietnam
*Corresponding Author: Tuan Q Dang, Department of Food Technology, International University (VNU-HCMC), Ho Chi Minh City, Vietnam.
Received: October 14, 2020; Published: October 30, 2020


The purpose of this study was to investigate possibility of using natural extract from plant materials instead of synthetic chemicals for control of melanosis in iced white-leg shrimps (Litopenaeus vannamei). Shrimp is a highly perishable product with limited shelf life due to development of melanosis during cold storage. Extracts from mangosteen peel (Garcinia mangostana L.), grape seed (Vitis vinifera), mango seed (Mangifera indica), avocado seed (Persea americana Mill) and pomegranate peel (Punica granatum L.) were obtained by using ethanol 70%. The extraction yield, total phenolic content and antioxidant capacity, PPO inhibition capacity of the extracts were determined and discussed. Also, the effect of the extracts on preserving color in white-leg shrimps stored on ice was studied at a dose 7.5 and 15 g/L. All the extracts contained significant quantity of phenolic compounds, of which the mango seed extract was highest (419.9 mgGAE/g DM). The higher TPC, the higher DPPH inhibition capacity was observed for the extracts. In general, there was a correlation between antioxidant capacity and PPO inhibition capacity in the extracts, except for the case of avocado seed. The avocado seed extract showed lowest antioxidant capacity (25.85%) among the five, but highest PPO inhibition capacity (83.38%). All the extracts were effective for preventing color change in iced white-leg shrimps at a concentration of 15 g/L, comparably to that of sodium metabisulfite at a dose of 12.5 g/L in a 10-day storage period. It suggested that the extracts could be used as an effective alternative to SMS.

Keywords: Antioxidant; Fruit By-Product; Melanosis; Polyphenol Oxidase; White-Leg Shrimp


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Citation: Tuan Q Dang and Tuan M Nguyen. “Effect of Ethanolic Extracts from Fruit By-Products on Inhibition of Melanosis in Iced White-Leg Shrimps (Litopenaeus vannamei)”. EC Nutrition 15.11 (2020): 09-17.

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