Objectives of the dissertation: Research on the degradation process of PE films containing prooxidant additives and recycled polyethylene. After that, preparing plant polybags with different time of degradation.

The objectives of the thesis: Study on chemical composition of Paramignya trimera and Morinda longissima species. Evaluation of hepatoprotective and anti-HBV activities of extracts and pure compounds from stems and roots of Xao tam phan (Paramignya trimera (Oliv.) Guill.) and Nho dong (Morinda longissima Y.Z. Ruan).

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.

The thesis consists of 135 pages, including 21 tables of data, 50 figures and 144 references. The structure of the thesis consists of: Introduction: 4 pages; Overview: 32 pages; Experimental part: 13 pages; Results and discussion: 63 pages; Recent contributions of the thesis: 1 page; The list of published works: 2 pages; References: 18 pages. There is also an appendix containing the spectrums and diagrams that measure the characteristics and properties of components and AG/CS/LOV, AG/CS/LOV/ginsenoside Rb1 composites with 11 pages.

Research to develop an analytical method for methyl mercury in biological samples with high sensitivity, selectivity, and accuracy; research and assessment of the transformation and bioaccumulation of mercury in sediment and biological samples in Than Sa gold mining area, Vo Nhai district, Thai Nguyen province.

The task of studying their chemical composition and biological activities of Morinda longissima and Paramignya trimera species in our country is important and urgent. From that point, the topic “Research on chemical compositions and biological activities of (Paramignya trimea (Oliv.) Guill. (Xao tam phan) and (Morinda longissima Y. Z. Ruan (Nho dong) '' was chosen.

The objectives of the thesis: Fabrication of diaphragm sensing material based on phenyl conductive polymer has stability and high sensitivity with heavy metal cations, which is used to identify and analyze heavy metal traces in water. Mời các bạn tham khảo!