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Документ Changes in cell membranes of white blood cells treated with a common food additive E407a(2021) Tkachenko, A. S.; Onishchenko, A.; Posokhov, Ye. O.; Roshal, Alexander; Myasoedov, Valeriy; Nakonechna, OksanaChanges are detected in the spectra of the fluorescent probe bound to rat WBCs treated with the solutions of E407a of various concentrations in comparison with the corresponding spectra of the probe incubated with the untreated leukocytes. The decrease in polarity and protondonor ability is observed in the lipid membranes of leukocytes in the region, where the probe locates.Документ Effects of semi-refined carrageenan (food additive E407a) on cell membranes of leukocytes assessed in vivo and in vitro(2021) Tkachenko, A. S.; Onishchenko, A.; Roshal, Alexander; Nakonechna, O.; Chumachenko, T.; Posokhov, Ye. O.No noticeable changes in the physico-chemical properties were observed in the lipid membranes of leukocytes in the region where the probes locate in response to oral intake of semi-refined carrageenan. Incubation of leukocytes with E407a solutions resulted in a decrease in polarity and proton-donor ability of leukocytes in the area of carbonyl groups of phospholipids and in the area of hydrocarbon chains of phospholipids near the polar region of the bilayer.Документ Synthesis and Characterization of Dye-Doped Polymer Films for Non-linear Optical Applications(Lviv Polytechnic National University, 2019) Mishurov, Dmytro; Voronkin, Andrii; Roshal, Alexander; Bogatyrenko, Sergiy; Vashchenko, OlgaIn this work polymer nonlinear optical (NLO) materials in the form of thin films based on 3,7,3’,4’-tetrahydroxyflavone and diglycidyl ether of bisphenol A were obtained and investigated. It was found that the influence of the chromophore concentration on values of the macroscopic NLO susceptibilities (χ(2) of doped polymer films has extreme character. The maximum value of χ(2) is 6.11 pm/V at the concentration of dopant 20 wt %.Документ X-ray diffraction analysis of quercetin and polymers based on its(NGO the Institute for Social Transformation, 2018) Mishurov, Dmytro; Voronkin, Andrii; Roshal, AlexanderSynthesis of glycidyl ethers of quercetin and studies of their structure have been carried out. The X-ray studies of glycidyl ethers of quercetin were performed using by the Debye–Sherrer method. The XRD data are in good correlation with the results of thermophysical studies and analysis by the scanning electron microscopy method, which was carried out earlier.Документ Influence of structure 3,5,7,3',4'–Pentahydroxyflavone-based polymer films on their optical transparency(2017) Mishurov, Dmytro; Voronkin, Andrii; Roshal, Alexander; Bogatyrenko, SergeyOptical properties and morphology of polymer films based on diglycidyl ether of bis-phenol A and on natural compound 3,5,7,30 ,40 epentahydroxyflavone (quercetin) using UVevis spectroscopy, scanning electron microscopy and powder X-ray diffraction methods have been investigated. The influence of ordering degree of the polymers, flexibility of their chains, intensity of intermolecular interaction between the quercetine moieties on the polymers' morphology was discussed. It is shown that all the quercetine-based polymer films are transparent at visible and near infrared regions beginning from 420 to 450 nm. Low optical transparency in the short-wavelength region can be explained the self-absorption of quercetin moieties in the polymer chains