Premium
STUDIES ON THE DELTA RESIN OF HOPS: I. ISOLATION AND PRELIMINARY FRAGTIONATION OF δ RESIN AND SOME OBSERVATIONS RESPECTING ITS NATURE AND COMPOSITION
Author(s) -
Jackson C. P.,
Walker T. K.
Publication year - 1959
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1959.tb01687.x
Subject(s) - fractionation , chemistry , homogeneous , fraction (chemistry) , solubility , chromatography , partition coefficient , potassium , magnesium , adsorption , reactivity (psychology) , organic chemistry , chemical composition , medicine , physics , alternative medicine , pathology , thermodynamics
Adsorption chromatography on columns of silica gel and partition between immiscible liquids have separated δ resin Into several non‐crystalline fractions, all having the predominating chemical reactivity associated with unsaturated, enolic/phenolic substances containing a carbonyl group. In addition, some of these fractions contain calcium, magnesium and potassium and possess a carboxylic acid function. The overall similarity in chemical behaviour of the fractions creates difficulties of working, for there is no simple basis on which to assess either the purity of a fraction or the efficiency of a fractionation procedure. A second factor which adds to the difficulties of using conventional fractionation techniques depends on the peculiar solubility characteristics exhibited; thus, composite fractions containing grossly differing materials behave physically like homogeneous single substances.