Spektralphotometrische Untersuchungen zur Lichtwirkung auf das Silberkeimsol

Zusammenfassung Einleitende qualitative Versuche haben bewiesen, da\ die Entf?rbungsreaktion der nach der Keimmethode hergestellten Silberhydrosole ganz wahrscheinlich ein Oxydationsvorgang des kolloiden Silbers unter Wirkung des Wasserstoffperoxyds ist, welches sich unter dem Einflu\ der ultravioletten Strahlen im Dispersionsmittel (Wasser) bildet. Quantitative, spektralphotometrische Untersuchungen haben bewiesen, da\ wir es in diesem Falle mit einer Reaktion der ersten Ordnung zu tun haben. Der Temperaturkoeffizient dieser Entf?rbungsreaktion ist ziemlich klein, jedoch etwas gr?\er als Eins.     

Über die Niveaukurven logarithmischer Flächenpotentiale

Ohne Zusammenfassung     

Über eine neue pyknometrische Dichtebestimmungs-Methode der weichen Fette

Ohne Zusammenfassung     

The aza-Pudovik reaction accelerated in external constant magnetic field

The aza-Pudovik reaction of N-benzyl aromatic and aliphatic aldimines with dimethyl H-phosphonate was found to be accelerated significantly when carried out in an external magnetic field. Its conversion rates were analyzed and compared with those obtained during the aza-Pudovik reaction carried out under standard conditions. Magnetic acceleration was found to have a similar degree as in that observed in the Kabachnik–Fields reaction. However, the formation of the starting imines was found not to be susceptible to constant magnetic field–no acceleration was observed.     

MCSCF calculation of response properties of Argon

Summary Analytic equations of the multiconfigurational SCF (MCSCF) response theory are combined with the finite-field (FF) approach to compute static and frequency dependent electric and magnetic properties of the Argon atom. A complete active space (CAS SCF) function including the 3s, 3p, 3d, 4s and 4p orbitals in the active space and a large (17s 13p 7d 5f 3g) basis set are employed. This permits an accurate determination of various linear and non-linear response properties such as e.g. electric dipole polarisability and second hyperpolarisability, Verdet constant, magnetisability and second hyperpolarisability. The results, both for the static values and for the frequency dependence of these properties, compare well with other most recent experimental and theoretical data.Dedicated to Jan Linderberg on the occasion of his 60th birthday     

Towards Martins minimum

We show that it is consistent with MA + ?CH that the Forcing Axiom fails for all forcing notions in the class of ω^ω–bounding forcing notions with norms of [17]. Received: 28 April 1999 / Published online: 12 December 2001