Goals of the study: Synthesis of new organic compounds (target) containing imidazole-5-one heterocycle; thiazolidine-2,4-dione heterocycle or 1,3,4-oxadiazoline heterocycle with different substituents in experimental conditions of Vietnam. Study on the properties, structures and biological activities of these compounds to contribute to the studies of both theory and application of heterocyclic compounds.

Polypropylene/ maleic anhydride /organic montmorillonite nanocomposites (PP/ MA/ Org-MMT) have been prepared via direct melt intercalation in an internal mixer. Maleic anhydride (MA) was used as a compatibilizer to improve the dispersability of the clay. The structures of nanocomposites have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Mechanical properties and thermal stability were determined by tensile analysis and thermogravimetric analysis (TGA), respectively. The XRD patterns, TEM and SEM image showed exfoliation of Org-MMT layers in PP matrix and existence of both the exfoliated, intercalated structures of the formed nanocomposites in presence of 1% MA. The tensile strength, elongation at break, and thermal stability of PP/MA/Org-MMT nanocomposites was higher than those of neat PP. MA played a very important role in reduction of size of Org-MMT and improved its dispersion in PP matrix.

The objective of the thesis is to produce two types of phase-phase Nano TiO2 materials Nitrogen inclusion on aluminum oxide metal (N-TiO2 / Al2O3) applied as a filter for air purifiers and nanocomposit hydroxyl apatite coated on nitrogen doped TiO2 (HA / N-TiO2) on the wall to treat toluene, Bacteria and fungi contaminate the air.

The human genome encodes ten different small heat shock proteins, each of which contains the so-called a-crystallin domain consisting of 80– 100 residues and located in the C-terminal part of the molecule. The a-crystallin domain consists of six or sevenb-strands connected by different size loops and combined in twob-sheets.