Target synthesis of bioactive thioglycolurils,based on QSAR predictions

Target synthesis of substituted thioglycolurils possessing sedative activity predicted by preliminary 3D-QSAR simulation of bioactive structures has been carried out.     

Photocatalytic hydrogen evolution and Rifampicinum destruction over carbon-modified TiO2

Research on Chemical Intermediates - Carbon-modified TiO2 using a sol–gel method (TiO2/CSG) and mechanochemical treatment (TiO2/CMC) was obtained. X-ray powder diffraction (XRD), scanning...     

Mapping electromagnetic fields near a subwavelength hole

We study, both experimentally and theoretically, the scattering of electromagnetic waves by a subwavelength hole fabricated in a thin metallic film. We employ the scanning near-field optical microscopy in order to reconstruct experimentally the full three-dimensional structure of the electromagnetic fields in the vicinity of the hole. We observe an interference of all excited waves with an incident laser beam which allows us to gain the information about the wave phases. Along with the well-known surface plasmon polaritons propagating primarily in the direction of the incident beam polarization, we observe the free-space radiation diffracted by the hole. We compare the experimental results with the fields of pure electric and pure magnetic dipoles as well as with direct numerical simulations. We confirm that a single hole in a thin metallic film excited at the normal incidence manifests itself as an effective magnetic dipole in the visible spectral range.     

Electrical properties and structure of thin chromium films

The temperature dependence of the electrical resistance of thin chromium films produced by vacuum condensation at 1· 10^–4 mm Hg on mica, optical glass, and rock salt substrates is considered. The electrical resistance of chromium films condensed on substrates heated to temperatures below 450 °C increases irreversibly on subsequent heating and cooling. Chromium films condensed on substrates heated to 500–600 °C, however, retain stable electrical properties on repeatedly heating and cooling.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii Fizika, No. 9, pp. 56–60, September, 1971.     

Small-scale equipment for producing thin-film devices

Small-scale equipment for producing thin-film devices is described. The equipment enables metal deposition and thermal processing to be carried out in vacuum. The electrical properties can be investigated at room temperature as well as during heating and cooling.     

The electrical properties of thin permalloy films

The magnetic properties of thin Permalloy films have been the subject of many investigations, but the work on their electrical properties is very limited [1]. By observing the change in electrical resistance with temperature the structural transformations taking place during the annealing of the condensates can be inferred.The authors of [1] did not undertake a detailed study of the electrical properties of Permalloy. They used Permalloy 79NMA in their investigation, and the dependence of the change in electrical resistance on the temperature of annealing in a magnetic field enabled them to reach conclusions about the nature of the uniaxial anisotropy of thin films.In the present work a detailed study has been made of the electrical resistance of Permalloy films in relation to the temperature of the substrate during evaporation and annealing; the temperature coefficient of resistance (TCR) has also been studied.