ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Apple quality assessment: relationship between optical properties, mechanical measurements and acoustic measurements

Madieta E. and L’Huillier J.P.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.120

2004

บทคัดย่อ

Physic-chemical assessment of textural quality of fruit requires setting up several techniques. Some ofthem such as the compression tests are well known and are easily interpretable in a professional context. They are unfortunately destructive. Based in a low mass impact, the acoustic technique is an alternative method developed in the two last decades. More recently developed, the non-invasive determination of the optical absorption and scattering properties of biological tissues is useful. Setting up those three approaches leads to a very large set of characteristics.

Included in a large program which studies the potentiality of laser use in fruits and vegetables quality control, this work was a first attempt to establish the correlation between a) the optical properties and mechanical parameters, andb) the optical properties and the acoustic firmness index. In the present study optical measurements were based o­n a spatially resolved model in continuous wave.

First results obtained for PLS regression techniques show that optical approaches may become a good indicator of textural properties.