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Abstract. The study is focused on ragworm (Polychaeta: Nereidae: Tylorrhynchus) in soil macrofauna community structure in a Northern Coastal Area of Vietnam. Field study was conducted during April and May 2016, at An Thanh, Tu Ky district of Hai Duong province. From Thai Binh river into inhabited areas, five habitat types were investigated inclu...

9 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 376 | Lượt tải: 0

Abstract. A study on species composition and density of polychaete (Polychaeta) was investigated in mangrove eco-system, Da Loc commune, Hau Loc District, Thanh Hoa province. Samples were collected in April, July, and November, 2010, from cross-sections of Len estuary and mangrove forests. A total of 15 polychaete species, belonging to 11 genera...

8 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 417 | Lượt tải: 0

Abstract. The coefficients of thermal expansion of metallic thin films with body-centered cubic (BCC) structure at ambient conditions were investigated using the statistical moment method (SMM), including the anharmonicity effects of thermal lattice vibrations. The analytical expressions of Helmholtz free energy, lattice constant, and linear the...

10 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 418 | Lượt tải: 0

Abstract: Fermentation is a complicated process which depends on a variety of conditions. In order to gain high fermentation efficiency with a low level of toxins and impurities to obtain good products, it is essential to determine suitable conditions for the process. Within the scope of this study, the effects of some key conditions was estimat...

8 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 638 | Lượt tải: 0

Abstract. This paper studies the influence of temperature 500 K, 1500 K, 2500 K, 3500 K and 4000 K on the microstructure and phase transition of a CaSiO3 bulk model using the Molecular Dynamics method with the Born-Mayer pair interaction potential and periodic boundary conditions. The obtained samples were analyzed through the radial distributio...

10 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 499 | Lượt tải: 0

Abstract. ZnO nanorod structures were grown on glass substrates using a hydrothermal method. Influences of growth temperature and hydrothermal solution concentration on ZnO nanorod structures were investigated. The results indicate that diameter and length of the ZnO nanorod increase with an increasing of growth temperature and hydrothermal sol...

6 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 440 | Lượt tải: 0

Abstract. Ni-doped TiO2, immobile on silica gel (Ti1−xNixO2/SiO2), was synthesized using the sol-gel method. The XRD patterns show that the TiO2 particles on SiO2 have an anatase crystalline structure with a particle size of around 7 nm in diameter. The results of absorption spectra indicate that the band gap of the anatase TiO2 powder was 3.3 ...

6 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 476 | Lượt tải: 0

Abstract. The adsorption of methylene blue (MB) onto activated carbon (AC) derived from coffee husk using zinc chloride activation at 600 oC was studied. The effects of various parameters such as contact time, initial MB concentration and temperature were investigated. The adsorption kinetics of pseudo first-order and pseudo second-order were u...

12 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 612 | Lượt tải: 0

Abstract. A new host phosphors of LaSr2AlO5 doped with Ce and Eu was synthesized using a solid-state reaction method and the synthesis conditions were investigated. The samples were characterized by X-ray diffraction, scanning electron microscopy, photoluminescent (PL) and photoluminescent excitation (PLE) spectra. LaSr2AlO5:Ce shows a yellow e...

5 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 498 | Lượt tải: 0

Abstract. On the basis of results obtained in the previous paper, by combining the statistical moment method and the self-consistent field method, the thermodynamic quantities for molecular cryocrystals of nitrogen type such as solid α-N2, α-CO, CO2 and N2O with face-centered cubic (FCC) structure and solid β-N2 with hexagonal close packed (HCP...

8 trang | Chia sẻ: thanhle95 | Ngày: 17/07/2021 | Lượt xem: 526 | Lượt tải: 0