Publications by authors named "G I Kovtun"
Article Synopsis
- The study investigates the structure and properties of polyvinyl alcohol (PVA) and PVA/glycerol films using various advanced techniques like FT-IR, XRD, TG/DTA, and SPM.
- Pure PVA films showed unique ribbon-shaped domains observed through SPM, which changed to rounded shapes when 22% glycerol was added, indicating modifications in the material's internal structure.
- Higher glycerol content led to a decrease in crystallinity and different properties, complicating analysis with SPM at over 36% glycerol, enhancing understanding of how glycerol acts as a plasticizer in PVA.
Objective: Aim: To analyse the burden and risk factors of Non-Communicable diseases (NCDs) in Ukraine to determine the ways to prevent them.
Patients And Methods: Materials and Methods: Using a statistical method, NCDs DALYs (Disability-Adjusted Life Years) in Ukraine were analyzed in dynamics for 1990-2019 and in comparison, with European and EU countries based on the data from "Global Burden of Disease, 2019" research.
Results: Results: The burden of NCDs in Ukraine is 1.
Bioactive materials may be applied in tissue regeneration, and an example of such materials are wound dressings, which are used to accelerate skin healing, especially after trauma. Here, we proposed a novel dressing enriched by a bioactive component. The aim of our study was to prepare and characterize poly(vinyl alcohol) films modified with strontium titanate nanoparticles.
View Article and Find Full Text PDFThis study focuses on the fabrication of polymer nanocomposite films using polyvinyl alcohol (PVA)/graphene quantum dots (GQDs). We investigate the relationship between the structural, thermal, and nanoscale morphological properties of these films and their photoluminescent response. Although according to X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and differential thermal analysis (DTA), the incorporation of GQDs does not significantly affect the percentage crystallinity of the PVA matrix, for a range of added GQD concentrations, atomic force microscopy (AFM) showed the formation of islands with apparent crystalline morphology on the surface of the PVA/GQD films.
View Article and Find Full Text PDFObjective: The aim: To analyze the burden of cardiovascular diseases (CVD) and their modified risk factors in Ukraine to substantiate ways of prevention.
Patients And Methods: Materials and methods: The burden of CVD was estimated by DALYs (Disability-Adjusted Life Years). The statistical method was used to analyze the data obtained from the statistical database of the international epidemiological study «Global Burden of Disease», updated for 2019.