ABSTRACT The aim of the present study was to characterise the surface properties of chicken breasts, and evaluate the wettability properties of edible coatings based on carrageenan and glycerol, using varying concentrations of the biopolymer and plasticiser. The surface of the chicken breasts was characterised as of low energy, with a surface tension of 54.56 mN/m, whose polar and dispersive components were 39.79 mN/m and 14.77 mN/m, respectively. The results showed that with an increase in the carrageenan concentration of the film-forming solution there was a reduction in the values for adhesion and spreading. Coatings with a higher glycerol concentration also obtained a lower spreading coefficient. Solutions 1 (carrageenan 1% and glycerol 0%), 2 (carrageenan 1% and glycerol 1%) and 3 (carrageenan 1% and glycerol 2%) did not differ statistically, obtaining the highest values for spreadability. Solution 1 (carrageenan 1% and 0% glycerol) presented the highest numerical values. For carrageenan coatings on chicken breasts, the best spreading coefficient was -4.49 mN/m. plasticiser energy 5456 54 56 54.5 mNm mN m 3979 39 79 39.7 1477 14 77 14.7 respectively filmforming film forming 0%, 0 , 0%) 2% statistically spreadability 4.49 449 4 49 -4.4 545 5 54. 397 7 39. 147 14. 4.4 44 -4. 4. -4 -

ABSTRACT Processing residues are still one of the main obstacles in the fishing industry due to waste and environmental impact. With that, ways of reusing these residues are researched to generate new products with different applications. The objective of this work was to develop and evaluate protein films obtained from mechanically separated meat (MSM) of Nile tilapia (Oreochromis niloticus) filleting residues. To get the films, the casting technique was used, varying their composition in relation to the amount of protein (1.0, 1.5 and 2.0%) and glycerol (0.0, 0.1 and 0.2%), creating a 32 factorial plan, with 9 treatments. The films were characterized in terms of color, opacity, water solubility, mechanical properties and water vapor permeability (WVP). In the end, a yield of 18.70% of Nile tilapia myofibrillar proteins (MPs) and a post-lyophilization protein content of 87.33% were obtained. It was concluded that the film that presented the best result in all the characteristics analyzed was the one with 1.0% of MPs and 0.1% of glycerol. impact applications MSM (MSM Oreochromis niloticus used 1.0, 10 1 0 (1.0 15 5 1. 2.0% 20 2 0.0, 00 (0.0 01 0. 0.2%, 02 0.2% , 0.2%) 3 plan treatments color opacity solubility WVP. WVP . (WVP) end 1870 18 70 18.70 (MPs postlyophilization post lyophilization 8733 87 33 87.33 1.0 (1. 2.0 0.0 (0. 0.2 (WVP 187 7 18.7 873 8 87.3 (1 2. (0 18. 87. (