RT Generic T1 Monitoring quality change of fruit during drying by application of laser light in the red spectrum T3 CIGR International Symposium on Sustainable Bioproduction - Water, Energy and Food A1 Romano,Guiseppe A1 Nagle,Marcus A1 Müller,Joachim WP 2013/02/20 AB The main task of this research is to apply laser backscattering technology to simultaneously predict variations in moisture content and hardness of apples during drying. The backscattering area in pixel numbers, representing the illuminated area after laser light injection, and light luminescence measured by grey values were used for estimating changes in internal quality parameters during drying. Laser light measurement at 635 nm was found to be adequate for predicting changes in moisture content and SSC of apple during drying over different stages. On the contrary, photon scattering at 635 nm is not recommended as estimator of change in hardness during apple drying, based on the results. K1 Apfel K1 Trocknung PP Hohenheim PB Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim UL http://opus.uni-hohenheim.de/volltexte/2013/822