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VIEW ARTICLE DOI: 10.1094/ASBCJ-57-0081
Beer
Haze. Charles
W. Bamforth
(1), Department
of Food Science
and Technology,
University of
California,
Davis 95616-8598.
(1) Corresponding
author. Tel:
530 752-1467;
Fax: 530 752-4759;
E-mail: <cwbamforthgucdavis.edu>
J. Am. Soc.
Brew. Chem.
57(3):81-90,
1999. Accepted
April 26, 1999.
Several
substances can
cause haze in
beer, but the
most frequently
encountered
problem is due
to a cross-linking
of polyphenol
and protein.
These materials
probably exist
in equilibrium
in beer and
manifest themselves
as a haze when
the polyphenol
polymerizes.
The proteins
particularly
involved in
haze are rich
in proline.
A range of stabilization
treatments--of
relatively low
cost--is available,
but the avoidance
of haze problems
(which seem
to be occurring
with increased
frequency) demands
a holistic approach
from the brewer
in which all
stages from
raw material
selection to
final processing
are geared to
achieving prolonged
shelf life.
Keywords: Haze
model, Polyphenol,
Polypeptide,
Prediction,
Stabilizer.
Existen
diversas substancias
capaces de enturbiar
la cerveza,
pero el problema
que se encuentra
más frecuentemente
se debe a un
entrecruzamiento
de polifenoles
y proteínas.
Probablemente
estos constituyentes
se encuentran
en equilibrio
en la cerveza
y se manifiestan
en forma de
turbiedad cuando
los polifenoles
polimerizan.
Las proteínas
específicamente
implicadas en
la formación
del turbio son
ricas en prolina.
Se dispone de
una gama de
tratamientos
para la estabilización
de la cerveza,
todos ellos
de un costo
relativamente
pequeño,
pero el soslayar
los problemas
de turbiedad
(que parecen
presentarse
cada vez de
forma más
frecuente) exige
que el cervecero
aborde el problema
globalmente,
de forma que
todas las etapas,
desde la selección
de materias
primas hasta
las fases finales
del proceso,
estén
encaminadas
a conseguir
la mayor vida
útil
del producto
en el mercado.
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A subscription to the Journal of the American Society of Brewing Chemists is complimentary with membership to the ASBC.
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.
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