Sampling

Through the use of four tradional research methods including document synthesis, interviews, pedagogical testing, and stascal analysis with a sample of 12 male students, the study had synthesized documents, conducted interviews, and tested the reliability of the tests, selecting 10 physical fitness tests for the U12 male soccer team of the school with sufficient reliability (coefficient r > 0.8).

8p viling 11-10-2024 1 1   Download

This study evaluated the test-retest reliability of the question about trouble with the locomotive organs in the NMQ in Vietnamese physical therapists (VPTs). Materials and method: It was a cross-sectional study in 10 VPTs by a convenient sampling technique.

6p vifilm 11-10-2024 3 1   Download

This study also contributes to reducing environmental pollution caused by plastic and glass waste as well as current construction brick production methods. The results show that the bulk density, compressive strength, and bending strength of brick samples made from PET plastic and glass waste are higher than those of burnt clay brick samples, while water absorption is much smaller than that of burnt clay brick samples.

8p viengfa 28-10-2024 2 1   Download

The primary objective of this study is to elucidate the chemical speciation of copper (Cu) and conduct an assessment of the magnitude and probability of contamination of Cu in soil samples procured from the Pb/Zn mining, at the Hich village, Dong Hy district, Thai Nguyen province, in order to furnish critical data pertinent to the environmental stewardship of soil resources within this geographical domain.

10p viengfa 28-10-2024 2 1   Download

In this paper, ZnO/CuO/Ag ternary composites were successfully synthesized by hydrothermal method using Zn(NO3)2.6H2O, Cu(NO3)2.3H2O and AgNO3. The composite samples were characterized using X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Raman spectroscopy.

8p viengfa 28-10-2024 2 0   Download

The objective of this study is to analyze the chemical speciation of Pb in sediment samples from the Than Sa gold mining area to obtain comprehensive information regarding the level of Pb contamination in sediment samples from this area.

9p viengfa 28-10-2024 3 0   Download

This research paper examines the determinants of plagiarism intentions among university students through the lens of the extended Theory of Planned Behaviour. The study conducted an online survey using convenience sampling with participants from Vietnamese and foreign universities, yielding 406 responses between April 11 and mid-May 2022.

21p viengfa 28-10-2024 4 1   Download

Asphalt concrete pavement often appears damaged such as rutting, fatigue crack, potholes, etc. at high air temperature, heavy rain in long time, or at locations with high traffic, large horizontal force, and poor-quality construction sites. T This paper presents an evaluation of shear bond strength of double-layer asphalt samples fabricated by shear test device with normal pressure.

8p viengfa 28-10-2024 3 2   Download

This paper studied the synthesis of calcium oxide (CaO) from snail shells by calcination, crushing, and grinding. Then, the sample was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), specific surface area (BET), and particle size.

10p viengfa 28-10-2024 1 1   Download

The aim of this is study to analyze and compare the amount of microplastics in the surface water and water column samples at Han River estuary (Da Nang) in the rainy season 2023. Sixteen water samples (eight water column samples and eight surface water samples) were collected and analyzed to determine the quantity, shape, color, size, and polymer forms of microplastics.

9p vimitsuki 30-03-2025 0 0   Download

The samples were synthesized in two steps containing the photochemical reduction and galvanic replacement reaction using silver nanodecahedra as a sacrificial template to obtain hollow silver-gold alloy nanoshells. The dimension of the hollow cavities can be controlled by varying the amount of HAuCl4. The prepared Ag/Au decahedra can be applied to the SERS analysis.

12p vimitsuki 30-03-2025 0 0   Download

This study, using descriptive statistics with 226 survey samples of economics students at Can Tho University of Technology, will describe the current awareness of young people about CE. The results show that young people's awareness of CE is still quite low.

12p viaburame 14-03-2025 2 0   Download

A procedure for quantitative analysis of trace element magnesium (Mg) in soft capsules (mainly containing vitamins, trace elements and herbal extracts) using atomic absorption spectroscopy (AAS) has been established. The sample was treated to convert the Mg compound to Mg+2 ion form in solution by heating the sample on a boiling water bath with 10% hydrochloric acid solution, with the addition of Polysorbate 80. The sample was diluted with 1% hydrochloric acid solution, with the addition of LaCl3 in the final solution for AAS measurement.

8p tuongmotranh 18-03-2025 2 1   Download

Thin films of ZnO and Al-doped ZnO are deposited on glass wafer substrates using a compressed sprayer system with Zn(CH3COO)2.2H2O and AlCl3 as precursors. The influence of Al doping concentration on the crystal phase and morphology of the samples is investigated by XRD and SEM, respectively.

9p viaburame 14-03-2025 3 1   Download

The aims of this study include: (1) analyzing the PAHs concentration in chicken egg samples; (2) evaluating the PAHs distribution in the albumen and yolk; and (3) estimating the exposure risk to human health via chicken egg consumption.

8p viyoko 01-10-2024 0 0   Download

In this study, spinel ferrite nanoparticles CoFe2-xLaxO4 (x = 0, 0.025, and 0.05) were successfully synthesized via a simple co-precipitation method using a 5% NaOH solution as a precipitating agent. The physicochemical properties of the materials, annealed at 850 °C for one hour, were characterized using powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and vibrating-sample magnetometry (VSM) at room temperature.

10p viling 11-10-2024 3 1   Download

In the present work, CeO2 with different loading was embedded on reduced graphene oxide (rGO) by a simple one-pot hydrothermal method. The synthesized samples were characterized using XRD, EDX mapping, FESEM, and UV-Vis DRS techniques.

11p vifilm 11-10-2024 4 1   Download

In this report, the solid phase extraction technique combined with the gas chromatographymass spectrometry method (GC-MS) was optimized to determine the contamination of nine phthalic acid esters (PAEs) in the surface sediment samples collected from Rao Cai River in Ha Tinh, Vietnam.

7p vifilm 11-10-2024 1 1   Download

In this study, Cat Hai fish sauce, one of the major traditional fish sauce manufacturers in Vietnam, was used to investigate the variation in histamine content during the fermentation process and to isolate histamine-producing bacteria. Six Dich Chuop samples corresponding to the first sixth months from the beginning of fermentation were collected for these purposes.

10p vibecca 01-10-2024 6 2   Download

This study investigated the role of perennial crop systems in enhancing sustainable livelihoods among rural households in Dak Lak province, Vietnam, with a particular focus on coffee and pepper crops. To gather data for this study, structured interviews were conducted with 86 households (90 farms) through a multi-stage sampling approach from January to May 2019.

12p vibecca 01-10-2024 3 2   Download