Resumo

SERNA COCK, LILIANA; TORRES VALENZUELA, LAURA SOFIA  e  AYALA APONTE, ALFREDO. CHANGES IN MECHANICAL PROPERTIES OF MINIMALLY-PROCESSED YELLOW PITAHAYA TREATED WITH 1-MCP. Dyna rev.fac.nac.minas [online]. 2012, vol.79, n.174, pp.71-78. ISSN 0012-7353.

The mechanical properties stress of yield limit (s_L), modulus of deformability (E_d), failure stress (s_F), and Hencky strain at failure (e_HF), of minimally-processed yellow pitahaya treated with 200 mgL^-1 1-MCP during storage (10±1 °C, 85% RH) was evaluated. Mechanical analysis of the fruit was performed using a stress-strain curve. The samples were subjected to uniaxial compression test at break. The results showed that the samples treated with 1-MCP showed the highest values of stress of yield limit, modulus of deformability and failure stress. This indicates that the application of 1-MCP provides greater firmness to the fruit and may represent an alternative to reduce undesirable changes in texture during storage.

Palavras-chave : Modulus of deformability; Failure stress; Hencky strain at failure; Stress of yield limit; Minimally-processed yellow pitahaya.

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