RESUMO Este estudo tem como objetivo avaliar a bioacessibilidade de compostos antioxidantes de frutas estruturadas. As amostras foram preparadas com 50% de cada polpa (manga/cajá, manga/caju e manga/acerola), ágar e goma de gel (baixo acil-LA e alto acil-HA) em relações LA:HA de: 100:0, 75:25 e 50:50, em uma concentração de 0,75%. Houve redução no conteúdo de compostos antioxidantes após a digestão in vitro. Os níveis de ácido ascórbico bioacessível variaram de 15,10% (LA100/HA0 manga/acerola) a 71,18% (LA50/HA50 manga/caju); os Polifenóis Extraíveis Totais (PET) variaram de 24,58% (manga/polpa de cajá) a 75,50% (LA75/HA25 manga/acerola); a atividade antioxidante variou de 21,10% (LA75/HA25 manga/cajá) a 51,05% (LA75/HA25 manga/acerola). A bioacessibilidade de ácido ascórbico da manga/acerola estruturada foi menor e a atividade antioxidante da amostra goma gelana HA manga/caju foi maior em relação à polpa, possível resultado da elevação de temperatura aplicada no processamento. Concluiu-se que os hidrocoloides ágar e goma gelana (HA e LA) foram capazes de reter esses compostos no processo de produção do estruturado e durante a digestão, o que comprova a semelhança das frutas estruturadas com polpas frescas.

ABSTRACT This study aims to evaluate the bioaccessibility of antioxidant compounds of structured fruits. Samples were prepared with 50% of each pulp (mango/caja, mango/cashew apple and mango/acerola), agar and gellan gum (low acyl-LA and high acyl-HA) in LA:HA ratios of: 100:0, 75:25 and 50:50, in a concentration of 0.75%. There was a reduction in the antioxidant compounds contents after in vitro digestion. The bioaccessible ascorbic acid levels ranged from 15.10% (LA100/HA0 mango/acerola) to 71.18% (LA50/HA50 mango/cashew apple); Total Extractable Polyphenols (TEP) ranged from 24.58% (mango/caja pulp) to 75.50% (LA75/HA25 mango/acerola); antioxidant activity ranged from 21.10% (LA75/HA25 mango/caja) to 51.05% (LA75/HA25 mango/acerola). Mango/acerola ascorbic acid bioaccessibility was lower and the mango/cashew apple HA gellan gum sample antioxidant activity was higher than pulp, probably due to temperature increasing at processing. It was concluded that the agar and gellan gum (HA and LA) hydrocolloids were able to contain these compounds in the production process of the structured and during digestion, which proves the similarity of structured fruits with fresh pulps.

Abstract This study aimed to develop an acerola smoothie using gellan gum (GG) as a texture modifier. Samples were developed with three concentrations of GG (0.1%, 0.2%, 0.3% w/v) and a control sample (without GG). Physicochemical, rheological, and sensory properties were evaluated. The smoothie samples showed increased color intensity than the control, with a tendency to yellow and red colors. However, the hydrocolloid concentration did not affect the samples' pH values (4.13 to 4.17). GG presence favored an increase in the samples' viscosity, classified as pseudoplastic fluid. There was a reduction in vitamin C in samples with GG (422.18 to 430.49 mg/100 g), however, the values remained close to the control (448.89 mg/100 g). There was greater sensory acceptance by the sample with intermediate texture (0.2% GG), which obtained a higher frequency for the attributes "homogeneous" and "acerola flavor".

Abstract This work aimed a sensory characteristics of structured guava elaborated with hydrocolloids agar and combinations of LA and HA gellan. The methods used were Optimized Descriptive Profile (ODP), CATA and Sensory Acceptance Tests. For the ODP, 18 semi-trained judges selected 12 sensory attributes and evaluated the samples using 9 cm unstructured scales. Sensory acceptance and CATA tests were performed by 100 untrained panelists. Sensory tests expressed medium acceptability indexes and similar results for all samples. The highest frequency CATA attributes were Homogeneous, Brightness, Pinkish red color, Guava aroma and Sour taste. The characteristics from ODP were Brightness, Sweet taste, Sour taste, Guava flavor, Firm and Sandy texture. Comparing the three methods, in the CATA and sensory acceptance, tasters did not identify differences between the samples in relation to the type of hydrocolloid, but with the ODP method they could achieve this.