Johannes Keyts; In 1678 de eerste Europese bezoeker van de Argunibaai in Nova Guinea

Johannes Walaeus. Zijn betekenis vor de verbreiding van de leer van de bloeds omloop

Johannes Walaeus. Zijn betekenis vor de verbreiding van de leer van de bloeds omloop [Johannes Walaeus. His significance in the recognition of the doctrine of blood circulation], by J. SCHOUTEN, Assen, Van Gorcum, 1972, pp. viii, 260, illus., Dfl. 46. Reviewed by Walter Pagel, 58 Millway, London, NW7 3RA. Walaeus [Jan de Wale] (1604-1649) was the first to confirm and amplify by original experim...

Van de Graaff Generator

In this work it was developed a Van de Graaff generator that we design and built and that is intended to be used in secondary schools for teaching basic principles of electrostatics, electromagnetic as well as a number of other applications. Today many schools laboratories and museums use this kind of generator for electrostatic demonstrations. Electrostatics was first noticed by the Greek phil...

Van de Putte 5_9

Hypericin is a potent agent in the photodynamic therapy of cancers and accumulates to a large extent in tumor tissue. To better understand the impact of hypericin aggregates present in the delivery vehicle on the biodistribution of the compound, we compared the in vivo tissue accumulation after administering hypericin suspended as coarse aggregates in phosphate-buffered saline, with the biodist...

De re and De dicto Modality in Islamic Traditional Logic

de Haas–van Alphen effect in superconductors

A theory of the de Haas–van Alphen effect in type-II superconductors is proposed. The effect of the electron scattering by nonmagnetic impurities in a magnetic field in the potential produced by a nonuniform distribution of the order parameter in a mixed state is investigated. The magnitude of the order parameter and quasiparticle density of states are determined from the solution of the system...