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VIEW ARTICLE    DOI: 10.1094/ASBCJ-63-0147

Rapid and Sensitive Method to Measure Premature Yeast Flocculation Activity in Malt (1). H. Koizumi and T. Ogawa (2), Central Laboratories for Frontier Technology, Kirin Brewery Co., Ltd. 1-13-5, Fukuura Kanazawa-ku Yokohama-shi Kanagawa 236-0004, Japan. (1) Elements of this work were presented at the World Brewing Congress, San Diego, CA, 2004. (2) Corresponding author. E-mail: <t-ogawa@kirin.co.jp> J. Am. Soc. Brew. Chem. 63(4):147-150, 2005. Accepted January 23, 2005.

We have developed a rapid, sensitive, and reproducible method to measure the premature yeast flocculation (PYF) activity level in malt without the need for mashing or fermentation. The analysis time was only 3 hr, and the PYF activity level measured by this method correlated well with that measured using a fermentation test. Furthermore, the PYF activity level in barley or green malt could be measured by this method. This method provides a highly efficient tool to test the fermentability of barley, malt, and wort. Keywords: Barley, Fermentability


Método Rápido y Sensible Para Medir la Actividad de Floculación Prematura de Levadura en Malta

Hemos desarrollado un método rápido, sensible, y reproductivo para medir el nivel de actividad de floculación prematura de levadura (FPL) en malta sin la necesidad de maceración o fermentación. El análisis solo tomo 3 horas, y el nivel de actividad de FPL medido por este método correlaciono bien con niveles medidos usando prueba de fermentación. Además, el nivel de actividad de FPL en cebada o malta verde se podría medir con este método. Este método proporciona una herramienta de alta eficiencia para probar la fermentescibilidad de cebada, malta, y mosto. Palabras claves: Cebada, Fermentescibilidad

 
 
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The ASBC Journal publishes scientific papers, review articles, and technical reports dealing with the chemistry and microbiology of brewing ingredients and relevant technology, as well as the analytical techniques used in the malting and brewing industry.