Experimental investigation of surface polaritons on plane interfaces -- Utility and futility of semiconductor effects -- Characteristic times in superconductors -- Investigation of point defects and their agglomerates in irradiated metals by diffuse X-ray scattering -- Experiments on hydrogen at megabar pressures; Metallic hydrogen -- Heterostructure injection lasers -- Physics and technology of photovoltaic solar energy conversion -- Aspects of the physics of microcrystals -- Experimental studies of the electron-phonon interaction in one-dimensional conducting systems -- Ternary semiconductors of type IB-III-VI2 and IIB-IV-V2 -- Orgnaic semiconductors -- Applications of superconductivity in high-energy physics.