Kvasny Prum. 2006; 52(11-12): 349-352 | DOI: 10.18832/kp2006029

Role of carbon dioxide and ethylene during storage process.Peer-reviewed article

Josef PROKEŠ, Helena FIŠEROVÁ, Alena HELÁNOVÁ, Jiří HARTMANN
1 VÚPS Praha, a.s. Sladařský ústav Brno
2 MZLU v Brně, Ústav botaniky a fyziologie rostlin
3 UKZÚZ Brno, odbor odrůdového zkušebnictví

Germination of grains of the spring barley varieties Jersey and Tolar was monitored under laboratory conditions simulating static malting. The samples used were steeped in such a way, to contain 45% of water after 72 hours of test duration. The total time of steeping and germination was 6 days. The samples were put in glass bottles closed with a rubber membrane. Always before grain weighing and further handling with the samples, 2 ml of the gas among grains were sampled by means of a tuberculin syringe. During the test, the gas composition in the bottles was purposefully influenced by ethylene and carbon dioxide sorbents and, to the contrary, an environment with an increased ethylene concentration was formed by using CEPA (2-chlorethyl- phosphonic acid). After the end of germination, the samples were kilned dry in a drier with forced air draught and, homogeneity and modification were determined for such samples.Germination of grains of the spring barley varieties Jersey and Tolar was monitored under laboratory conditions simulating static malting. The samples used were steeped in such a way, to contain 45% of water after 72 hours of test duration. The total time of steeping and germination was 6 days. The samples were put in glass bottles closed with a rubber membrane. Always before grain weighing and further handling with the samples, 2 ml of the gas among grains were sampled by means of a tuberculin syringe. During the test, the gas composition in the bottles was purposefully influenced by ethylene and carbon dioxide sorbents and, to the contrary, an environment with an increased ethylene concentration was formed by using CEPA (2-chlorethyl- phosphonic acid). After the end of germination, the samples were kilned dry in a drier with forced air draught and, homogeneity and modification were determined for such samples.

Keywords: carbon dioxide, ethylene, malt, malting

Published: November 1, 2006 

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