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Summary: Reports concerning the content of α-amino-nitrogen and amino-acids in human semen are few and results are different with authors. These variations could be explained by the no considerations of the changes due to liquefaction. In order to test this possible effect, measures were performed 30 mn, 1 h 30,3 h and 5 h after seminal collection. The content of the most amino-acids increased with time except phosphoserine, tau-rine and ornithine; several amino-acids appear. In cases of azoospermia, levels of α-amino-nitrogen and amino-acids were lower. The content of amino-acids is not influenced by the spermatozoa count that seems to indicate their glandular origins. The free amino-acids content had to be considered in regard to cases with low liquefaction. But, in all cases it appears necessary to use a strictly standardized method since results are influenced with time. Deproteinization was obtained with mixture of baryum hydroxyde and zinc sulfate. The data were compared to results of spermiogram. According to seminal parameters, 6 categories were distinguished. Measures showed a significant increase of the α-amino-nitrogen with time. The chromatography separation showed 19 different free amino-acids. Zusammenfassung: Deproteinisierung wurde durch Mischung von Bariumhydroxyd und Zinksulfat erreicht. Die Ergebnisse wurdem mit den Ergebnissen des Spermiogramms ver-glichen. Je nach dem Spermaparameter konnten sechs verschiedene Kategorien festgestellt werden. Die Messungen zeigen mit der Zeit eine Vermehrung der Aminossluren. Die Chro-matographie zeigte neunzehn verschiedene freie Aminossluren. Der Gehalt der meisten Aminosäuren vergrößert sich mit der Zeit, ausgenommen: Phosphoserin, Taurin, Omithin. Bei Azoospermie ist der Gehalt an Aminonitrogen und Ami-nossluren niedriger. Der Gehalt der Aminosáuren vergrowird nicht von der Spermatozoendichte beeinfluß; das beweist die Herkunft der Aminosäuren aus den akzessorischen Dräsen. Es scheint notwendig, eine streng standardisierte Bestimmungsmethode zu verwenden, weil die Ergebnisse von der Zeit beeinflußt werden.
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Hernvann et al. (2009) studied this question.
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