Svetlana N Savić-Šević

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The purpose of this research was to investigate the influence of modulated photoactivation on cuspal movement. Eight class II MOD composite restorations were analyzed under various photoactivation protocols in a real-time manner using holographic interferometry. During the first photoactivation protocol, the composite restoration was illuminated for 200 s(More)
Laser induced fluorescence is a powerful spectroscopic technique commonly used to study the structure and internal state distributions in molecules of biological interest. Betanin (C24H26N2O13) is a specific violet betacyanin and the most prominent pigment in the red beet root where it contributes to 75–95% of the total visible color. Our method of(More)
Here we report how interference and scattering-enhanced absorption act together to produce the golden wing patches of the burnished brass moth. The key mechanism is scattering on rough internal surfaces of the wing scales, accompanied by a large increase of absorption in the UV-blue spectral range. Unscattered light interferes and efficiently reflects from(More)
Apatura ilia (Denis and Schiffermüller, 1775) and A. iris (Linnaeus, 1758) are fascinating butterflies found in the Palaearctic ecozone (excepting the north of Africa). The wings of these insects are covered with a great number of two types of scales positioned like roof tiles. Type I scales are on the surface, while type II scales are situated below them.(More)
We describe the formation and morphology of complex, ordered polysaccharide-based structures by combining the holographic method and a self-assembly. We use dichromated polysaccharide as holographic material. Multilayer structures were fabricated as a volume Bragg reflection grating recorded with the single-frequency, diode pumped Nd-YAG laser, at 532 nm.(More)
We present properties of surface and volume photonic structures generated in Dichromated pullulan (DCP) using holographic technique. Volume Bragg gratings have properties of photonic crystals - wide bandgaps of the order of 100 nm. The bandgap is cantered at 560 nm at room temperature, and can be tuned with the substrate temperature to 480 nm at 100(More)
The iridescent features of the butterfly species Apatura iris (Linnaeus, 1758) and A. ilia (Denis & Schiffermüller, 1775) were studied. We recognized the structural color of scales only on the dorsal side of both the fore and hind wings of males of both of the aforementioned butterfly species. The scale dimensions and microstructure were analyzed by a(More)
We describe a real-time holographic technique used to observe dental contraction due to photo-polymerization of dental filling during LED lamp illumination. An off-axis setup was used, with wet in-situ processing of the holographic plate, and consequent recording of interference fringes using CCD camera. Finite elements method was used to calculate internal(More)
Structures similar to those found on butterfly wings were produced holographically on thin layers of dichromated pullulan. Light propagation and scattering is studied in these nanometre periodic structures, and in the wings of Lepidoptera (moths and butterflies). We have found that the width of photonic band-gaps in each case is influenced by light(More)
An experimental technique to reveal the effects of dental polymer contraction is established to choose the most appropriate polymerization technique. Tooth deformation following a dental filling polymerization is analyzed using double-exposure holographic interferometry. A caries-free, extracted human molar is mounted in dental gypsum and different cavity(More)