TL;DR: In this article, a study of the n-alkanes of Hypericum perforatum L. revealed the presence of all members in the series C16C29. Contrary to previous reports, the prevailing nalkane was found to be nonacosane which was isolated in the pure state and identified on the basis of physical and spectral properties.

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24 citations

Journal Article•DOI•

n-1-Alkanols of Hypericum perforatum

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Ilia Brondz, Tyge Greibrokk, Arne J. Aasen

01 Nov 1983-Journal of Natural Products

19 citations

Journal Article•DOI•

High-performance liquid chromatographic separation and ultraviolet detection of prostaglandins, oxidized by pyridinium dichromate

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Jo Døhl¹, Tyge Greibrokk¹•Institutions (1)

University of Oslo¹

30 Dec 1983-Journal of Chromatography A

TL;DR: In this paper, a rapid UV derivatization procedure has been developed which allows complete separation of the prostaglandins E 1, E 2, A 1, A 2, B 1 and B 2 in less than 12 min.

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9 citations

Journal Article•DOI•

Guard Columns in HPLC: An Examination of the Effect of MPLC™ Cartridge Guard Columns on Column Efficiencies and Some Theoretical Aspects of the Use of Guard Columns

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