Short path distillation was used for the enrichment of ubiquinone-9 from a lipid hydrocarbon extract. The main components of the lipid hydrocarbon extract were hydrocarbons of gas oil (b. p. 513 to 653 K), phosphatides, glycerides, and fatty acids. Phosphatides were isolated by extraction with acetone before distillation. The acetone soluble fraction was distilled by a pressure of

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Am Beispiel der Lichtbestandigkeit wird ein Verfahren beschrieben, das ausgehend von mathematischen Ausgleichsfunktionen fur die Charakterisierungsmerkmal-Zeit-Verlaufe bei Labor-und Gebrauchsbeanspruchungen Zusammenhange zwischen der Laborbeanspruchungsdauer und der Gebrauchsdauer herstellen lafit. Es wird ein differentielles Belichtungsdauer-Verhaltnis definiert, dessen geometrischer Mittelwert und geometrischer Variationskoeffizient geeignete KenngroSen zur Optimierung dea Laborbeanspruchungsverfahrens darstellen. Method for determining t h relationship between parameter-dependent performanee properties of polymer solids. I I . Optimization of the relationship between exposure to artificial light and performanceBased on mathematical fitting functions for the time-dependence of material characteristics obtained in laboratory and performance tests a method is described and demonstrated using light stability as an example, which allows to establish relationships between testing period and actual performance time. A differential exposure time ratio is defined, the geometric mean value and geometric variation coefficient being appropriate characteristics for the optimi--xation of laboratory performance tests.

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