Fujita Alice, Souza Volnei Brito, Daza Luis Daniel, Fávaro-Trindade Carmen Silvia, Granato Daniel, Genovese Maria Inés
Laboratory of Food Bioactive Compounds, Food and Experimental Nutrition Dept., FCF, Univ. of São Paulo, Av. Prof. Lineu Prestes, 580, 05508-000, São Paulo - SP, Brazil.
Laboratory of Food Engineering, Faculty of Zootechnics and Food Engineering, Univ. of São Paulo, Av. Duque de Caxias Norte, 225, 13635-900, Pirassununga, São Paulo, Brazil.
J Food Sci. 2017 May;82(5):1083-1091. doi: 10.1111/1750-3841.13668. Epub 2017 Mar 22.
Camu-camu (Myrciaria dubia) fruit is a rich source of bioactive compounds but its shelf life is rather short. Therefore, this study was aimed to evaluate the effect of inlet air temperature (T) and concentration (C) of maltodextrin and arabic gum on the spray-drying process of commercial camu-camu pulps (São Paulo and Manaus). Moisture, solubility, total phenolics (TP), ascorbic acid (AA), and proanthocyanidins (PAC) contents, and in vitro antioxidant capacity of the powders (FRAP, DPPH, Folin-Ciocalteu's reducing capacity were measured). Arabic gum resulted in better yields (22% to 30%), powder solubility (84% to 90%), and lower losses of analyzed compounds than the powders manufactured with maltodextrin. Overall, inlet air temperature had a lower impact on the responses studied than the concentration of carrier agents. Polynomial equations were generated for AA (R = 0.993), TP (R = 0.735), PAC (R = 0.946), and for the antioxidant capacity assays (0.867 ≤ R ≤ 0.963). In addition, principal component analysis showed that the lowest concentration of carrier agents (6%) in spray drying resulted in the lowest losses of bioactive compounds and, consequently, the highest antioxidant capacity.
卡姆果（Myrciaria dubia）果实富含生物活性化合物，但其保质期相当短。因此，本研究旨在评估进风温度（T）以及麦芽糊精和阿拉伯胶的浓度（C）对市售卡姆果果肉（圣保罗和马瑙斯）喷雾干燥过程的影响。测定了粉末的水分、溶解度、总酚（TP）、抗坏血酸（AA）和原花青素（PAC）含量以及体外抗氧化能力（FRAP、DPPH、福林 - 西奥尔特法还原能力）。与用麦芽糊精制备的粉末相比，阿拉伯胶产生了更高的产率（22%至30%）、粉末溶解度（84%至90%）以及更低的分析化合物损失。总体而言，进风温度对所研究响应的影响小于载体剂浓度。生成了关于AA（R = 0.993）、TP（R = 0.735）、PAC（R = 0.946）以及抗氧化能力测定（0.867≤R≤0.963）的多项式方程。此外，主成分分析表明，喷雾干燥中载体剂的最低浓度（6%）导致生物活性化合物的损失最低，因此抗氧化能力最高。
