Abstract Consumers are more demanding in relation to meat quality, developing new demands, such as increased shelf life and good sensory quality. The tenderness of the meat is one of the most important elements in the choice of the product, the modification in the intrinsic structure of the meat, for example, increase of the proteolysis and fragmentation of the myofibrils contribute to the improvement of the tenderness. However, it is necessary to develop technological strategies so that this ultrasound technology can be added to improve meat tenderness. Thus, the objective of this review was to know the main aspects of the use of ultrasound and acerola residue in meat tenderness. Overall, existing research demonstrates excellent prospects for this new redesign approach.

Objetivou-se avaliar o efeito da cepa probiótica Saccharomy cerevisiae na alimentação de pós-lavas de tilápias-do-nilo submetidas a desafio sanitário (fezes de ovinos). Foram selecionadas 300 pós-larvas, com média de peso e comprimentos uniformes. Os tratamentos consistiram de peixes cultivados em água limpa com ração comercial, em quantidade de 10% da biomassa, sem o uso de probiótico e peixes cultivados em água sob desafio sanitário, alimentados com ração comercial, em quantidade de 10% da biomassa e com o uso de probiótico (1,0g Kg-1). Para promover o desafio sanitário aos peixes, foram dissolvidos 50g de fezes de ovinos trituradas in naturaem 1000,0mL de água. Foram avaliadas as variáveis da qualidade da água para determinação imposta pelos dois tratamentos experimentais. Constatou-se efeito significativo (P<0,05) na concentração de fósforo total, pH e oxigênio dissolvido da água com fezes de ovinos, representando o desafio do meio, fato este essencial para a realização desse experimento. Não houve efeito significativo (P>0,05) nas variáveis de desempenho, sobrevivência e índice hepato-somático. As pós-larvas de tilápias-do-nilo alimentadas com ração contendo probiótico (1g.kg-1) submetidas a desafio sanitário proporcionam melhorias no desempenho, sobrevivência e índice hepatossomático equiparando-se aos peixes de água limpa sem o uso de probiótico.

This study aimed to evaluate the effect of the probiotic Saccharomyces cerevisiaein feeding post-lavas of Nile tilapia subjected to sanitary challenge (sheep feces). 300 post-larvae were selected, with average weight and uniform lengths. The treatments consisted of fish grown in commercial feed with clean water, in an amount of 10% of the biomass, without the use of probiotics and fish grown in water under sanitary challenge fed with commercial diet at 10% of the amount of biomass and the use of probiotics (1.0g kg-1). To promote the health challenge the fish were dissolved 50g of feces in sheep nature crushed in 1000.0 ml of water. Variables of water quality to determine imposed by the two experimental treatments were evaluated. A significant effect (P<0.05) in the concentration of total phosphorus, pH and dissolved oxygen water with sheep faeces, representing half of the challenge, a fact essential to conduct this experiment. There was no significant effect (P>0.05) in performance variables, survival and hepato-somatic index. Post-larvae of Nile tilapia fed diet containing probiotic (1g.kg-1) submitted to health challenge provide improvements in performance, survival and liver somatic index matching up to clean water fish without using probiotic.