Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: P6: Biomaterials and Biopolymers

CPP 34.8: Poster

Dienstag, 17. März 2015, 14:00–16:00, Poster C

Determination of Amylolytic Activityof Malts by Rheological Measurements — •Janyl Iskakova, Jamila Smanalieva, and Asylbek Kulmyrzaev — Kyrgyz-Turkish Manas University, Bishkek, Kyrgyzstan

Malting is the most important stage in the processing of the Kyrgyz traditional beverage Bozo. In current study, the amylase activities of maize, millet, wheat, and barley malts were investigated by rheological methods using cooked millet porridge as a substrate for enzymes.

The aim of this work has been to demonstrate the applicability of rheological measurements as alternative, rapid, safe for health and simple method for measuring amylolytic activity of grain malts. The standard colorimetric method for the determination of amylase activity was compared with rheological method. Millet porridge exhibited pseudoplastic behavior and the Ostwald-De-Waele was used as suitable fitting model. The highest amylolytic activity was found in barley malt and the lowest in maize malt. The rheological method is demonstrated to be advantageous, particularly with regard to speed, simplicity, no requirement for chemicals and possibility of the online monitoring of the structural changes.