Browsing by Person "Romano, Guiseppe"

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Decontamination of black peppercorn (Piper nigrum L.) using microwave-generated low pressure air plasma
(2011) Müller, Joachim; Stroth, U.; Aurich, S.; Argyropoulos, Dimitrios; Janzen, O.; Krause, N.; Romano, Guiseppe; Heindl, A.; Heberle, B.; Leins, M.; Schulz, A.; Voesgen, W.
The preliminary results show that microwave-generated low pressure air plasmas could be a very efficient method for the decontamination of spices since the population of a microorganism (Bacillus subtilis) commonly found in black pepper (Piper nigrum L.) was significantly reduced on test substrates in a very short period of time. Based on the experimental results, a laboratory apparatus was developed for the sterilisation of spices.
Monitoring quality change of fruit during drying by application of laser light in the red spectrum
(2011) Müller, Joachim; Nagle, Marcus; Romano, Guiseppe
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.
Rapid phenotyping of different maize varieties under drought stress by using thermal images
(2011) Müller, Joachim; Romano, Guiseppe; Zia, Shamaila; Spreer, Wolfram; Cairns, Jill; Araus, Jose Luis
The development of maize genotypes with high yields under drought is of pivotal relevance for the International Maize and Wheat Improvement Centre (CIMMYT). Thermal images of the canopy of different 92 maize genotypes were acquired in the time interval between anthesis and blister stage with each picture containing five plots of different genotypes. Mean temperature differences of more than 2°C between different genotypes under water stress were then detected using thermal images. Genotypes better adapted to drought exhibiting lower temperatures. A canopy thermal image is a potential promising method to accelerate the screening process and thereby enhance phenotyping for drought adaptation in maize.