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Das Buch von Volker Harlan verdankt seinen Inhalt umfangreichen Studien des Autors, besonders auch seiner Arbeit mit dem teilweise unveröffentlichten Nachlass von Beuys und Klee. Der Inhalt gliedert sich in sechs Kapitel: 1. Naturphilosophische und naturwissenschaftliche... Read More

Path curves are fundamental constructions of projective geometry. They might also serve as single-parametric archetypal forms in the plant and animal kingdom. This hypothesis is based on the observation that a large variety of buds, cones, and eggs show a striking similarity... Read More

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... Read More

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 is differentiated. On the... Read More

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,... Read More

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. Comparing the physiology of... Read More

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. Meanwhile an ‘ecological consciousness’ has... Read More

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 postnatal growth, but not all proteins are really nutritive. Lipids are correlated... Read More

«An und in dem Boden findet man für die höchsten irdischen Bedürfnisse das Material, eine Welt des Stoffes, den höchsten Fähigkeiten des Menschen zur Bearbeitung übergeben ...», so beschreibt noch Goethe in «Wilhelm Meister» das Handwerk der Chemiker.1 Nach ihm setzt eine... Read More

Schon Goethe äußerte in seinen letzten Lebensjahren die Hoffnung, dass es einmal möglich sein werde, auch die chemischen Prozesse in der Pflanze in einer ebenso befriedigenden Weise zu verstehen, wie ihm selbst das auf der morphologischen Ebene gelungen war (Kuhn 1988). Im... Read More

In the polarity of action and perception in chemistry the emphasis seems to be on action. Several stages in the development of the concepts of ‘Optical Activity’ and ‘Chirality’ since the 17th century show that physical experiments (actions) lead to several mathematical... Read More

Agriculture et Paysages, Landwirtschaft und Landschaft - dieses Wortpaar steht für einen im Tal der Thur lebenden Landschaftsimpuls und ist zugleich Name einer Vereinigung der dort ansässigen bäuerlichen Betriebe. Landschaft soll aus der Landwirtschaft heraus ergriffen und... Read More