BACKGROUND The frozen preservation of lamb meat could be crucial for successful international trade. The shelf life of thawed meat is shorter than that of fresh meat, so techniques or procedures are required to improve post‐thawing meat quality attributes. This study investigated the effect of alginate‐based edible coatings after the incorporation of essential oils of thyme (Thymus vulgaris L.) and garlic (Allium sativum L.) on thawed lamb meat (longissimus thoracis et lumborum muscle) quality after long‐term frozen storage. Meat samples came from ten light lambs and the evolution of attributes related to shelf life, such as water‐holding capacity, color stability, and lipid oxidation, was monitored during display (1, 4 and 7 days). Four meat treatments were evaluated: control (CON, uncoated meat), edible coat of alginate meat (ECA), and ECA with thyme or garlic essential oils (0.05%) (THY and GAR). RESULTS The alginate‐based edible coatings decreased exudative losses (P < 0.001) and modified color characteristics, especially increasing yellowness (P < 0.001) and chrome (P < 0.001). GAR decreased redness (P < 0.001) and the oxy/met ratio [R (630/580) wavelength light reflectance] or discoloration [R (630–580)]. THY was the treatment that best retained color during display and also showed a significantly lower lipid oxidation (P < 0.05) than CON and ECA, whereas GAR presented intermediate values. CONCLUSION The addition of bioactive essential oils to alginate‐based edible coatings improved preservation and shelf life of lamb meat after thawing. © 2019 Society of Chemical Industry

Wooden breast (WB), white striping (WS) and spaghetti meat (SM) are breast myopathies of the Pectoralis major that greatly affect meat quality in broilers. To differentiate color and texture characteristics with instrumental methods, some of them applied for the first time in this species, 300 carcasses were randomly chosen from an abattoir from five different flocks from the same farm, at a rate of 60 carcasses from each flock. Twenty-four hours after slaughter, both side breasts were dissected, and yields calculated. Color was measured on the surface of the breast with a spectrocolorimeter and reflectance values obtained. Texture was measured on raw meat with a modified compression test that hinders the fiber from expanding transversally and a texture profile analysis (TPA) and also on cooked meat with a Warner–Bratzler shear and a TPA. Color differs between severity degrees, increasing redness (from −1.77 to −1.32 in WB) and, especially, yellowness (from 5.00 to 6.73 in WS) and chroma (from 5.75 to 7.22 in SM) with the severity of the myopathy. The subtraction R630 minus R580 was found to be a useful index to differentiate breast myopathies degrees. The modified compression test can be considered an effective tool to assess the hardness of different structures in each myopathy. Texture differences in the myopathies are better assessed in raw than in cooked meat.

ResumoO objetivo do trabalho foi avaliar a sobressemeadura de diferentes cultivares de aveia em pastagem de estrela-africana (Cynodon nlemfuensis vr. Nlemfuensis) manejada com diferentes resíduos de forragem. Os cultivares de aveia utilizados foram aveia preta comum (Avena strigosa), aveia branca comum (Avena sativa), aveia preta cultivar IAPAR-61 (Avena strigosa cv IAPAR-61), aveia branca cultivar IAPAR-126 (Avena sativa cv IAPAR-126). A pesquisa foi realizada na Universidade Tecnológica Federal do Paraná, Câmpus Dois Vizinhos, no período de 15/05/2009 e 26/10/2009. O delineamento experimental utilizado foi o bloco ao acaso, em um esquema fatorial 4 x 3 (quatro cultivares de aveia e três resíduos de estrela africana). Foram avaliados: massa de forragem, porcentagem dos componentes estruturais da forragem, produção total, produção total de aveia e colmo, produção de estrela africana e qualidade das forragens. Não houve interação entre cultivar e resíduo de forragem para nenhuma das variáveis estudadas. A pastagem sobressemeada com a aveia branca cv. IAPAR-126 apresentou maior produção de forragem total (aveia + estrela africana) (4.427,1 contra 2.384,0 kg de MS/ha) e de aveia (2.453,0 contra 1.588,7 kg MS/ha) em comparação à aveia preta comum. A aveia preta comum apresentou maior percentual de colmo (13,6 %) em relação a aveia branca cv. IAPAR-126 (5,4 %). A aveia branca comum apresentou maior teor de FDA no resíduo (estrela africana + aveia) em comparação a aveia branca IAPAR-126 (41,9 contra 36,3%). Já a aveia branca comum apresentou menor teor de FDN (49,0%) em relação à aveia branca IAPAR 126 (54,9%) e a aveia preta comum (57,0%). Em relação à proteína bruta, a aveia preta comum apresentou maior teor (15,6%) em relação as demais. Palavras-chave: Cynodon, FDN, FDA, proteína, IAPAR 61, IAPAR 126 AbstractThe objective of this study was to evaluate the oversown of different oat cultivars in grazing African star (Cynodon nlemfuensis vr. Nlemfuensis) managed with different forage residuals. The oat cultivars used were black oat (Avena strigosa), common oat (Avena sativa), oat IAPAR-61 (Avena strigosa IAPAR cv-61), oat IAPAR-126 (Avena sativa IAPAR cv-126). The research was conducted at Federal Technological University of Paraná, Campus Dois Vizinhos, between 05/15/