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Some morphological and chemical changes in hops during maturation
Author(s) -
Menary Robert C.,
Doe Peter E.
Publication year - 1983
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740340905
Subject(s) - dry matter , maturity (psychological) , yield (engineering) , scanning electron microscope , biology , zoology , morphology (biology) , chemistry , botany , horticulture , materials science , composite material , psychology , developmental psychology
Abstract The surface topography of lupulin glands was studied at various stages of maturity using scanning electron microscopy. Maximum gland filling coincided with maximum alpha‐acid concentration and dry matter yield. The percentage of the different components of oil remained constant after maximum gland filling had occurred. Dry matter content of hops at maximum gland filling varied from year to year and was not an accurate guide to optimum harvest date.