Abstract
A translation from German of the original paper by Prof. Planer in which he describes his observations of selective light reflection in monotropic cholesteric liquid crystal phase of cholesteryl chloride that he synthesized. Translation by Peter Oelschlaeger, Chemistry Department and Center for Macromolecular Modeling and Material Design and by Hector Cordova Mireles, Department of Physics, both from the California State Polytechnic University at Pomona. Translation was slightly revised by Prof. H.S. Kitzerow, Department of Chemistry from the University of Paderborn in Germany. Reproduced with the permission of Willey-VCH Verlag GmbH & Co. KGaA.
Highlights
KGaA Translation received June 1, 2010 A translation from German of the original paper by Prof. Planer in which he describes his observations of selective light reflection in monotropic cholesteric liquid crystal phase of cholesteryl chloride that he synthesized
The significance that cholesterol gains for the physiologist due to its presence in the animal organism and namely due to its constant appearance in all regressive metamorphoses of animal tissue, moved me a while ago to conduct experiments on this body substance, namely in order to liberate it from its isolated position in the chemical system and to thereby possibly obtain clues for the judgment of its role in the animal body
From the detailed work of Berthelot, which appeared in Ann. ch. phys. 112, 356, I see that the chlorine cholesteryl synthesized in my way is a very different compound than the one that Berthelot obtained by heating hydrochloric acid and cholesterol in a fused tube, which he describes as a non-crystalizable, transparent, resinlike substance, whose chlorine content constantly decreases. This prompts me to call attention to the cholesteryl prepared by me, namely because this compound is quite suitable for the exact determination of the formula of cholesterol and could probably successfully be used as a starting point for the synthesis of other compounds of this body substance
Summary
The significance that cholesterol gains for the physiologist due to its presence in the animal organism and namely due to its constant appearance in all regressive metamorphoses of animal tissue, moved me a while ago to conduct experiments on this body substance, namely in order to liberate it from its isolated position in the chemical system and to thereby possibly obtain clues for the judgment of its role in the animal body. Published in German in “Mittheilungen aus dem Universitatslaboratorium in Lemberg”∗, Annalen der Chemie und Pharmacie (Annals of Chemistry and Pharmacy), Band CXVIII, Bandes erstes Heft (Issue 1), 25–27, 1861. Copyright Willey-VCH Verlag GmbH & Co. KGaA Translation received June 1, 2010 A translation from German of the original paper by Prof.
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