MBAA Home

Magnetic Resonance Imaging Studies of Barley During Kilning

MBAA TQ vol. 39, no. 3, 2002, pp. 127-132  |  VIEW ARTICLE

Peer-Reviewed Paper

Marco L. H. Gruwel (1), Xiang S. Yin (2), Donald Proctor (2), and Suzanne R. Abrams (1). 1. National Research Council, Plant Biotechnology Institute, 110 Gymnasium Place, Saskatoon, SK, Canada S7N 0W9. 2. Prairie Malt Ltd./Cargill Malt Americas, Biggar, SK, Canada S0K 0M0.

Abstract
Water movement in barley kernels during kilning was noninvasively monitored by magnetic resonance imaging (MRI) using two model systems. Micromalting experiments of a hulled (Harrington) and a hull-less (CDC Dawn) variety were performed to study the general difference in kernel water redistribution. Samples were selected at different times throughout the kilning stage to obtain the kernel dehydration pattern as a function of kilning time. During kilning, it was shown that parts of the kernels previously showing active metabolism, including the embryo and roots and shoots, retained water the longest. Although the two varieties show significant differences in water redistribution during kilning, the final product does not significantly differ in moisture content.
Keywords: hulled, hull-less, kilning, MRI, water distribution

 

S�ntesis
El movimiento de agua en granos de cebada durante el horneado fue monitoreado de manera no invasiva mediante la imagen producida por resonancia magn�tica (MRI, de sus siglas en ingl�s) utilizando dos sistemas de modelos. Experimentos de micromalteo con una variedad de cebada con cascarilla (Harrington) y una sin cascarilla (CDC Dawn) se realizaron para estudiar la diferencia general en la redistribuci�n del agua dentro del grano. Se tomaron muestras a diferentes momentos del horneado para obtener el patr�n de deshidrataci�n del grano como funci�n del tiempo de horneado. Se demostr� que, durante el horneado, el agua se retuvo por mayor tiempo en aquellas partes del grano que previamente haya mostrado un metabolismo activo: el embri�n, las ra�ces y la pl�mula. A�n cuando las dos variedades muestran diferencias significativas en la redistribuci�n del agua durante el horneado, el contenido de humedad del producto final no var�a de manera notable.
Palabras claves: con cascarilla, sin cascarilla, horneado, MRI, distribuci�n de agua

HOME | CONTACT | JOIN/RENEW | ADVERTISE | STORE

© Copyright Master Brewers Association of Americas