Magistriniame darbe yra nagrinėjami švaraus opalo pralaidumo spektrai. Nustatyta, kad stop juostos padėtis priklauso nuo spindulio kritimo kampo į bandinį. Apskaičiuoti pagrindiniai parametrai: tarp-plokštuminis atstumas d, opalo sferų diametras D, bandinio lūžio rodiklis n ir opalo sferų lūžio rodiklis . Pagamintas opal-FeTTPS hibridinis darinys ir išnagrinėtas jo pralaidumas bei magnetinis cirkulinis dichroizmas. Nustatyta, kad FeTTPS stop juostos padėtis prie įvairių kampų šiek tiek skiriasi nuo švaraus opalo. Hibridinio darinio magnetinis cirkulinis dichroizmas kinta keičiant kritimo kampą ar stop juostos padėtį. / In this work transmission optics of opal photonic crystals and infiltrated with iron porphyrin was studied. Work analyses synthetic opal crystals grown by means of sedimentation from the spheres of SiO2. Samples were 0.9 mm thick, and their surfaces planes were parallel (111) to crystallographic planes. In these samples, the stop band due to Bragg reflection from the (111) plane was observed in the spectral region of 0.45-0.7 µm at angles of light incidence. Iron porphyries FeTTPS magnetic circular dichroism was also investigated. Synthetic opal crystals composed of silica spheres were infiltrated with (c=10 mM, pH=6.8) buffered phosphate solution of iron porphyrin. In optical studies the FeTPPS-impregnated opal samples were immersed in hexane solution to vary average refractive index of composite system and to control the mutual positions of the opal stop band and absorption bands of FeTPPS. FeTPPS magnetic circular dichroism spectra dependency on opal stop band position was noted. The experimental opal transmission spectra date were analyzed in which the optical response of the opal and infiltrated with iron porphyrin was calculated by using a Bragg’s law and it was found that spacing between adjacent [111] lattice planes d is 254.95 nm, opal crystal composed of silica spheres of diameter is 312 nm and average refractive index of composite system – 1.35.

Name of the thesis Reactive oxygen species and their neurophysiological role Aim of the thesis Aim of the theoretical part is to provide overview of reactive oxygen species (ROS) and show their place in organism - posstive and necessary effects for the organism on the one hand and source of serious diseases on the other hand. Futhermore, the theoretical part deals with the restoration balance between the production of free radicals and antioxidants protection. Theoretical part also deals with substance FeTTPS. Aim of the experimental part is to determinate whether the application of FeTTPS affects cerebral blood flow during trancallosal stimulation with increasing frequency. Futhermore, to determinate whether the applicatication of this substance affects the slope of the curve and threshold of evoked potencials and number and duration of afterdischargers. Research method The research took place at the premises of Onstitue of Physiology, Academy of Sciences, Czech Republic. Experiments were carried out on laboratory albine Wistar rats. General anesthesia was performed to rats, stimulating and sensing electrodes were implated in epidural area of sensorimotoor cortex and Laser Doppler flow probe was implated into the contralateral hemisphere. In the first part of experiment included 11 animals. We...