Obstacles with non-trivial trapping sets in higher dimensions

The new results concerning the continuity of holomorphically contractible systems treated as set functions with respect to non-monotonic sequences of sets are given. In particular, continuity properties of Kobayashi and Carathéodory pseudodistances, as well as Lempert and Green functions with respect to sequences of domains converging in the Hausdorff metric are delivered.     

The effect of aminoalkoxy and glycidoxyalkoxy silanes on adhesion characteristics of double and triple copolymers of ethylene

The effect of aminoalkoxy and glycidoxyalkoxy silanes on strength of a polyethylene-modified copolymer-metal (polyethylene terephthalate) adhesion joint was studied for double and triple acetate copolymers of ethylene. It was shown that such modification resulted in an essential increase in the deformation-strength and adhesion characteristics of adhesive joints.     

The nature of interactions on copolymer of ethylene with a vynilacetate-metal interface

Surface energetic and acid-base properties of coatings based on copolymers of ethylene with vinylacetate are studied. It is shown, that acid-base interactions have determining role in adhesion interaction on the interface with metal.     

Analysis of the influence of cardanol content on the properties of phenol-cardanol-formaldehyde novolac resins

The influence of cardanol content on the molecular-weight distribution and curing kinetics of phenol-cardanol-formaldehyde novolac oligomers is investigated. It is shown that, depending on the cardanol content, the resulting oligomers can be used as components in glues and sealants of different purposes.     

Radiative strength functions in odd-A spherical nuclei

The radiative strength functions for the partial γ-transitions from neutron resonances to the ground and low-lying states of odd-A spherical nuclei are calculated within the quasiparticle-phonon nuclear model. The fragmentation of one-quasiparticle and quasiparticle-plus-phonon states is calculated. This allowed one to calculate γ-transitions between the one-quasi-particle components (valence transitions) and γ-transitions between the quasiparticle-plus-phonon and one-quasiparticle components of the wave functions. The energy dependence of the strength functions $\text{C}$(E1, η) and $\text{C}$(M1, η) is calculated near the neutron binding energy B_n for ⁵⁵Fe and ^{59, 61}Ni. The corresponding experimental data are described qualitatively. The contribution of the valence E1 transitions to the strength function is shown to be from 20% to 90%, and M1 transitions about 1%. The influence of the M1 giant resonance is important for M1 transition probabilities.     

Thione-disulfide interchange of some heterocyclic tautomeric thiones and their symmetrical disulfides

Summary The UV/Vis spectroscopic properties of some symmetrical disulfides derived from potentially tautomeric thiones are investigated. Reversed thione-disulfide transformation is observed, and the influence of several factors including the nature of solvent, concentration, and UV irradiation, is studied. Possible implication of the tautomeric thiol form and the importance of this thione-disulfide redox system in biological aspects is suggested. A general scheme including monomer-dimer equilibrium, thione-thiol tautomeric equilibrium, and reversible thiol-disulfide redox behaviour is proposed in order to explain the factors affecting the overall thione-disulfide transformation.

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Thion-Disulfid-Umwandlung einiger heterocyclischer tautomerer Thione und ihrer symmetrischen Disulfide

Zusammenfassung Die UV/Vis-spektroskopischen Eigenschaften einiger symmetrischer Disulfide, die als Derivate von potentiell tautomeren Thionen auftreten, wurden untersucht. Es wurde eine reversible Thion-Disulfid-Transformation beobachtet. Der Einfluß einiger Faktoren wie Natur des Lösungsmittels, Konzentration und UV-Bestrahlung wurden erforscht. Die Bedeutung des untersuchten Redoxsystems in biologischer Hinsicht wird diskutiert. Um die Auswirkung der einzelnen Faktoren auf die Umsetzung zu erklären, wird ein allgemeines Schema vorgeschlagen (Monomer-Dimer-Gleichgewicht, Thion-Thiol-Gleichgewicht, reversibles Thiol-Disulfid-Redoxsystem).

     

IR spectroscopic properties of H(MeOH)n + clusters in the liquid phase: evidence for a proton wire

The long-standing problem of understanding the nature of the "excess proton" in acidified water is simplified by studying the proton in methanol. The 3D network of hydrogen bonds in H(aq) + is reduced to a 1D problem. Infrared spectroscopic characterization of linear chain methanol proton solvates in H(CH3OH)n + for n=2-8 provides insight into some of the puzzling IR spectral features associated with O-H-O vibrations. These include the virtual disappearance of otherwise strong bands from H-bonded methanol molecules adjacent to symmetrical O-H+-O groups. The data indicate that a chain of up to four O--HO bonds either side of this group can act as an electrical wire to separate positive charge. This suggests a refinement of the Grotthuss proton-hopping mechanism for explaining the anomalously high mobility of H+ in H-bonded media.