منابع مشابه
A kinetic study on the isomerization of hop alpha-acids.
In this article, a detailed study on hop alpha-acid isomerization kinetics is presented. Because of the complex wort matrix and interfering interactions occurring during real wort boiling (i.e., trub formation and alpha-acids/iso-alpha-acids complexation), this investigation on alpha-acid isomerization kinetics was performed in aqueous buffer solution as a function of time (0-90 min) and heatin...
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A general-purpose microcomputer was used to au tomate the determination of lead conductance value by titration. The microcumputer, presented with an extracted sample in a beaker, controls the addition of titrant and the taking of data, performs all calculations, and finally prints the corrected result along with a record of the titration. A number of operating parameters were studied in order t...
متن کاملNoteAntioxidative Actiyity of Hop Bitter Acids and Their Analogues
Hop (Humulus ltrptttus L.) cones are uscd not only in brewing of beer but also in folk mcdicine as a tranquilizer or b{ttcr stornachic, In 1950s1960s, some papers reportcd the existence of substances which had estrogen like activity in hop cones,t-3} and Kumai and his colleagues discovered gonadotropin inhibitors containcd in hop cones.`) Unfortunately, the rcported bioactive substanccs have no...
متن کاملMechanism of cis-trans isomerization of unsaturated fatty acids in Pseudomonas putida.
We studied the pattern of the cis-trans isomerization of unsaturated fatty acids in cells of Pseudomonas putida S12 grown in a medium supplemented with oleic acid which was deuterated at both of the C atoms of its double bond. Direct evidence that isomerization does not include a transient saturation of the double bond was obtained. In addition, analysis of the amino acid sequences of the seven...
متن کاملSequential Ruthenium Catalysis for Olefin Isomerization and Oxidation: Application to the Synthesis of Unusual Amino Acids.
How can you use a ruthenium isomerization catalyst twice? A ruthenium-catalyzed sequence for the formal two-carbon scission of allyl groups to carboxylic acids has been developed. The reaction includes an initial isomerization step using commercially available ruthenium catalysts followed by in situ transformation of the complex to a metal-oxo species, which is capable of catalyzing subsequent ...
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ژورنال
عنوان ژورنال: Journal of the Institute of Brewing
سال: 2016
ISSN: 0046-9750
DOI: 10.1002/jib.349