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Entwicklung der Biokristallisation für die Unterscheidung von Proben mittels computerunterstützter Texturanalyse und visueller Bildauswertung Organic Eprints
Kahl, Dr. Johannes; Huber, Machteld; Busscher, Dr. Nicolaas; Kretschmer, Sebastian; Andersen, Dr. Jens-Otto; Mergardt, Gaby; Paulsen, Marianne; Doesburg, Paul; Meier-Ploeger, Prof.Dr. Angelika.
Because of the growing market in organic produce screening methods are needed which allow the characterization of the food. Since many years the so called biocrystallization technique has been used to characterize products derived from different farming systems yet the method was not validated. The results of our investigations in the last three years show that the method can fulfill the requirements for the validation process due to international standards. The sample preparation and the crystallization procedures could be standardised and documented. For the crystallization factors of influence were described and controlled. In addition to the traditionally used visual evaluation a new computerized image texture analysis program was succesfully applied....
Tipo: Conference paper, poster, etc. Palavras-chave: Food security; Food quality and human health.
Ano: 2005 URL: http://orgprints.org/3775/1/3775.pdf
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Authentication of organic wheat samples from a long-term trial using biocrystallization Organic Eprints
Kahl, Dr. Johannes; Busscher, Dr. Nicolaas; Mergardt, Gaby; Mäder, Dr. Paul; Dubois, Dr. David; Ploeger, Prof. Dr. Angelika.
Organic and conventional wheat grain samples from a long-term field trial were tested with standardised biocrystallization method. In 1999-2006 the organic samples can be separated from the conventional samples using computerized texture analysis and standardised visual evaluation of the crystallization patterns. Moreover the organic samples can be classified in 2005-2006 after training in 2003.
Tipo: Conference paper, poster, etc. Palavras-chave: Food security; Food quality and human health.
Ano: 2008 URL: http://orgprints.org/11731/1/Kahl_11731_ed.doc
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Vergleichbarkeit von Qualitätsuntersuchungen mit den Bildschaffenden Methoden (Kupferchlorid-Kristallisation) Organic Eprints
Busscher, Nicolaas; Kahl, Johannes; Mergardt, Gaby; Andersen, Jens-Otto; Huber, Machteld; Meier-Ploeger, Angelika.
In der vorliegenden Arbeit wird der wissenschaftliche Ansatz, die Methode zu validieren beschrieben und der Einfluss der Kammerbedingungen auf die Kristallisation systematisch untersucht und statistisch ausgewertet. Die Klimakonditionen haben einen signifikanten Einfluss auf die Streuung der Werte, sowohl innerhalb eines Kammerdurchgangs, als auch im Vergleich zwischen zwei Kammerdurchgängen. Bei der Einstellung der Startfeuchte auf dem Ring variieren die Feuchtenwerte die dafür erreicht werden müssen von Kammer zu Kammer; weitere Untersuchungen werden zeigen, ob dies auf die unterschiedlichen Abstände beim Aufbau der Kammern (bis zu 2 Jahren Differenz) an den einzelnen Orten zurückzuführen ist (Adaption des Werkstoffes). Eine Vergleichbarkeit von...
Tipo: Conference paper, poster, etc. Palavras-chave: Specific methods.
Ano: 2003 URL: http://orgprints.org/1027/1/busscher%2Det%2Dal%2D2003%2DCuCl2%2DKristallisation.pdf
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