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Elemente der Naturwissenschaft2002,2002Arbeitsgruppen Pigmente für die Malerei - Phänomenologische Materiekunde Theodor Bolsinger, Chemiker, ehemals Ciba Basel Mit käuflichen, fixfertigen Malfarben zu arbeiten ist heute so zur Selbstverständlichkeit geworden, dass die Benutzer meistens Mühe haben, sich den enormen Aufwand vorzustellen, der einst z.B. im Atelier eines jan von Eyck... read more
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Elemente der Naturwissenschaft2002,2002Biochemie und Physiologie der Farbstoffe der menschlichen Haut Klaus-Peter Endres Summary The variation in colour of the human skin is mediated by the coloured substances melanin and haemoglobin, and to a lesser degree by carotene. Spectrophotometric analysis reveals that the distribution of these three pigments within the human organism... read more
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Elemente der Naturwissenschaft2002,2002Cholesterin und Glyceridfette Eine Polarität innerhalb der Lipidsubstanzen Martin Errenst Summary This paper is about the relationship of cholesterol to human physiology. Cholesterol is synthesised by the human body. On the other hand, triglyceride fats are required in our diet because our body cannot synthesise essential fatty acids.... read more
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Elemente der Naturwissenschaft2002,2002Zur Biochemie der Milch von Tier und Mensch Proteine, Lipide und Kohlenhydrate der Milch in ihrem biologischen Kontext Daniel Braun Summary The article reviews and extends interspecific correlations between the main components of milk of different mammalian species and certain aspects of their biology. Proteins are correlated with... read more
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Elemente der Naturwissenschaft2002,2002Auf dem Weg zu einer natürlichen Ordnung der Pflanzensubstanzen Klaus Frisch Introduction Towards the end of his life Goethe expressed the hope that one day it would be possible to understand the chemical processes of a plant in a way just as satisfying as the one he had achieved at the morphological level (Kuhn 1988). In retrospect, one... read more
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Elemente der Naturwissenschaft2002,2002Die Rationalität der Chemie Peter Janich Summary Despite the very important role of chemistry in technology, civilisation and shaping our view of the world it has been neglected by philosophy and the humanities. For several reasons, it cannot be regarded as an appendix to physics and treated as such in the theory of science. Several... read more
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Elemente der Naturwissenschaft2002,2002Handeln aus Ideen Armin Scheffler Summary One reason for investigating medicinal plants is that it gives hints from empirical experience about their therapeutic effects. It is generally believed that this experience is obtained by chance. Thus deducing therapeutic effects from exact observation of the plant, including its specific... read more
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Elemente der Naturwissenschaft76,2002ELEMENTE DER NATURWISSENSCHAFT 76 1/2002 Zur Entstehung der Farben Die Erkenntniswege des «Goetheanismus» und der «modernen Physik» Thomas Schmidt Summary Through investigating the relation between light and colour, Goethe’s method of natural science is applied to the ”gestures of ideas” of modern research in physics. In section 1... read more
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Elemente der Naturwissenschaft2002,2002Die Abfallentsorgung im 20. Jahrhundert Ein Spiegel unseres Umweltbewusstseins Jörn Heinlein Summary This contribution describes how people related to the waste they produce throughout the ages until the present. Undoubtedly the amount of waste that we discard nowadays is unsustainable. This is also due to its chemical properties.... read more
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Elemente der Naturwissenschaft76,2002ELEMENTE DER NATURWISSENSCHAFT 76 1/2002 Die Grundversuchsanordnungen für die Lichtbeugung an Kanten Hanspeter Seipp Summary The simplest arrangements of edges that give rise to the phenomenon of light diffraction are presented. Especially two of them are of particular importance. They imply two different types of optical imaging and... read more