Preparation and characterization of sustainable active packaging based on myofibrillar proteins and protein hydrolysates from the cutting by-product of Scomberomorus brasiliensis filleting on the band saw machine.

Protein hydrolysates derived from aquaculture by-products hold significant promise as key components in the formulation of active films. In our study, we investigated the impact of different protein hydrolysates levels (0.4%, 0.8%, and 1.2%) obtained from the cutting by-product of Serra Spanish mackerel on the mechanical (PHSSM), morphological, optical, thermal, and antioxidant properties, as well as the degradability of biodegradable films. Four treatments were produced, varying the concentrations of PHSSM: C (control, without PHSSM), T4 (with 0.4% PHSSM), T8 (with 0.8% PHSSM), and T12 (with 1.2% PHSSM). These films were based on myofibrillar proteins from fish by-products and pectin extracted from yellow passion fruit. The incorporation of PHSSM led to enhanced barrier properties, resulting in a proportional reduction in water vapor permeability compared to the control film. However, high PHSSM levels (>0.8%) compromised film homogeneity and increased fracture susceptibility. Tensile strength remained unaffected (p > 0.05). PHSSM-enriched films exhibited reduced transparency and lightness, regardless of PHSSM concentration. The addition of PHSSM imparted a darker, reddish-yellow hue to the films, indicative of heightened visible light barrier properties. Moreover, increased PHSSM content (0.8% and 1.2%) appeared to accelerate film degradation in soil. Fourier transform infrared spectroscopy confirmed the presence of pectin-protein complexes in the films, with no discernible differences among the treated samples in the spectra. Incorporating PHSSM also enhanced film crystallinity and thermal resistance. Furthermore, an improvement in the antioxidant activity of the films was observed with PHSSM addition, dependent on concentration. The T8 emerged as the promising candidate for developing active primary packaging suitable for oxidation-sensitive foods.

DESENVOLVIMENTO DE EMBUTIDO RICO EM FERRO ELABORADO A PARTIR DE SUBPRODUTOS COMESTÍVEIS DO ABATE DE CAPRINOS / DEVELOPMENT OF A RICH IRON SAUSAGE PREPARED WITH EDIBLE BY-PRODUCTS OF GOATS SLAUGHTER

Objetivou-se com este estudo elaborar chouriço caprino a partir de subprodutos do abate e determinar sua qualidade físico-química e sensorial. Três formulações foram testadas, sendo um lote defumado e o outro não, com variações nas proporções de vísceras (30, 20 e 10%) e sangue (30, 40 e 50%). Foram avaliados os parâmetros de Aa, pH, cor (L*, a*, b*), composição centesimal e análise do perfil de minerais dos chouriços. Realizou-se pesquisa sensorial exploratória de natureza qualitativa, utilizando-se o método do grupo de foco. A variação nas proporções de subprodutos (sangue, coração e rim) na elaboração do chouriço não apresentou efeito significativo quanto a composição centesimal, pH e Aa. Percentual de ferro mais elevado e maior intensidade de a* (cor vermelha) foram detectados na formulação com maior teor de sangue. O processo de defumação diminuiu a atividade de água, favorecendo a qualidade sensorial do chouriço caprino em relação aos atributos de aroma e sabor.