Elaboração e caracterização de extratos vegetais hidrossolúveis de castanha de caju e de baru

Abstract

In recent years, we have seen the growth of products of vegetable origin used as substitutes for cow's milk, among which stand out plant extracts. Cashew nuts and baru nuts have excellent nutritional characteristics to be used in the preparation of water soluble vegetable extracts. The objective of this work is to elaborate and characterize the water soluble vegetable extracts based on baru nuts and cashews. The extracts were prepared in a ratio of 1: 6 (almond: water), with addition of iota carrageenan (0.2%), salt (0.1%), sucrose (3%), inulin (0.5%) and sorbate of potassium (0.03%). The characterization of chestnuts and extracts was performed using the following parameters: pH, titratable total acidity, protein, lipids, ash, moisture, carbohydrates, phenolic compounds and DPPH radical sequestration capacity. The extracts were also analyzed by the sensorial analysis that counted on the presence of 80 tasters. All analyzes were performed in triplicates after 7 days of storage, and the results were expressed as the mean ± confidence interval for 95% confidence. The results were compared to those of other authors and other nuts and extracts. Both chestnuts and extracts presented high amounts of lipids, proteins and minerals. The presence of phenolic compounds and antioxidant potential were also identified, but with low values when compared to those found in the literature. The best results in both analyzes were obtained by baru nuts (34.83 mg AG / 100 g and 391 mg g.gDPPH-1, respectively) and barium extract (19.61mg AG / 100g and 804g.gDPPH-1, respectively). The results obtained in the acceptance and purchase intention tests showed that water soluble cashew and baru extracts were not well accepted by the judges, and the attributes taste, appearance and color did not obtain significant difference between the two different extracts, presenting intermediate scores between 5-6, "I liked and did not dislike" and "I liked it slightly", with an acceptability index for mean attributes of 62.6% for EHC and 66.7% for EHB, which were below the index acceptability of 70%. The intention to buy the two extracts did not show any significant difference between them, standing in the range between 2-3 "possibly not buy" and "maybe bought / maybe did not buy."