Proximate analysis of different groups of irradiated alginic acid

Abstract

Background: Seaweeds contain significant quan��es of lipids, protein, vitamins and minerals. Aquavac Ergosan contains 1% alginic acid extracted from two brown seaweeds, Laminaria digitata and Ascophyllum nodosum. Both in vivo and in-vitro researches have mainly been focused on the effect of Ergosan on fish growth, survival rate, reproducve performance and innate immunity in blood and epidermal mucus. Despite numerous studies on the ef fects of Ergosan on immune system of aquac animals and evaluaon of seaweeds in proximate analysis, there is no data available on proximate analysis of irradiated Ergosan extract (alginic acid). Therefore, the aim of this study was to assess the effect of on different groups of irradiated alginic acid (10, 20, 30, 40 and 50 KGy) for analyzing proximate composion. Materials and Methods: Alginic acid was prepared from the sonicated Ergosan extract. The Alginic acid extracted from Ergosan was irradiated with a gamma cell. The protein and lipid content and Moisture and ash were recorded. Results: Stascal analysis showed no signif icant dif ferences among all of groups in terms of protein, lipid, ash and moisture. Conclusion: Radiaon processing is a very convenient tool for imparng desirable effects in polymeric materials. The polysaccharide degradaon by gamma or ultraviolet irradiaon is free of iniators. High energy radiaon technique can be effecvely used to decrease the molecular weight of different polysaccharides such as alginate and Chitosan. Based on the results of this study, gamma irradiaon of alginic acid as natural polysaccharide had no effect on crude protein, crude lipid, moisture and ash.