บทคัดย่องานวิจัย

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Complementary measurements for apple texture discrimination: (1) ‘Force-displacement’ curves analysis.

Camps C., Guillermin P., Mauget J.C., Laurens F., Bertrand D.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.91

2004

บทคัดย่อ

Complementary measurements for apple texture discrimination: (1) ‘Force-displacement’ curves analysis. Among the apple quality criteria, the texture is a complex notion studied at several levels.Currently, the reference measurements consist in a group of mechanical tests, destructive for fruits.Moreover, the information given by these different mechanical tests seems not to be enough used to accessing to accessing to a better texture discrimination.More generally included in a European research program (HIDRAS) conducted to the INRA of Angers (France), this work compare the mechanical response of apple fruits using two usual tests: Penetrometric and Compression assays, for the texture discrimination of five apple hybrids.

Our study, allowed to see the difference of responses given by the two different tests showing the complementary information given by these two mechanical tests.Indeed, the discrimination (factorial discriminate analysis, 5 independent cross validation) of our five textures has been improved when the parameters extracted from the penetrometric and the compression data curves have been pooled in a same matrix.A discrimination accuracyof 83%, 93%, 80%, 92% and 88% has been obtained for the five apple hybrids.The same chemometric method processed with o­nly penetrometric or compression data can’t give a similar discrimination accuracy, confirming the complementary of these two kinds of measurements o­n textural properties.

This study permitted us to identify at least two different origins for the apple texture discrimination.These results could help us for a better comprehension of apple texture evolution witch could occurred at several tissues levels, showing several rheologic behaviours.