The magnetic behaviour of diluted CrAl alloys

Magnetic susceptibility as a function of temperature of binary CrAl alloys containing 0.7,1.07,1.35,1.59, 1.79,1.98, 2.18, 2.84, 3.74 and 4.36 at %A1 is investigated. Aluminium, by alloying, acts on the Néel temperature of pure chromium giving rise to a complicated phase diagram. The bahaviour of the magnetic susceptibility as a function of temperature, in the ordered phase, for the samples containing 1.28, 2.18 and 2.84 at %A1 is found to be temperature independent. In the paramagnetic region, for the samples containing between 1.07 and 2.84 at %A1, it is found a decrease of the magnetic susceptibility as a function of temperature.     

Die Herabsetzung der Luminescenzausbeute von Phosphoren (in diesem Beispiel Cadmiumsulfid) durch Spurenelemente

Ohne Zusammenfassung     

Bei der Aktivit?tsmessung an, durch Radionukliden (wie 14C, Tritium usw.) markierten, organischen Verbindungen

Ohne Zusammenfassung     

Metall-Komplexbildung von β-Hydroxythiophenderivaten III

The acidity constants of 2-acetyl-3-hydroxy-thiophene (III) and 3-acetyl-4-hydroxy-thiophene (IV) and the stability constants of their complexes with some bivalent metal ions have been determined. The stability of the chelates is discussed as a function of the respective bond orders of the α–β and β–β′ bonds of the thiophene ring.     

Flammenpliotometrie

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Self-adjunctions and matrices

It is shown that the multiplicative monoids of Temperley-Lieb algebras are isomorphic to monoids of endomorphisms in categories where an endofunctor is adjoint to itself. Such a self-adjunction is found in a category whose arrows are matrices, and the functor adjoint to itself is based on the Kronecker product of matrices. This self-adjunction underlies the orthogonal group case of Brauer's representation of the Brauer centralizer algebras.