Concentration

This study investigates the effect of various experimental conditions, such as initial pH, initial arsenic concentration, shaking temperature, and contact time, as well as thermodynamics models on the ability to remove arsenic from water.

8p viengfa 28-10-2024 0 0   Download

Silver nanoparticles (Ag NPs) with a size of around 9 nm were fabricated and quantified through fluorescence quenching of rhodamine B (RhB). A series of solutions composed of RhB with various concentrations of Ag NPs ranging from 0.09 pM to 0.98 pM were prepared, and optical properties were investigated by absorption and fluorescence spectroscopies.

8p viengfa 28-10-2024 2 1   Download

To survey fasting plasma glucagon-like peptide-1 concentrations in newly-diagnosed type 2 diabetes mellitus patients having overweight or obese status. Subjects and methods: A cross-sectional descriptive study on 92 subjects, divided into 3 groups.

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This study proposes the application of Ensemble Decision Tree Boosted (EDT Boosted) model for forecasting the surface chloride concentration of marine concrete Cs. A database of 386 experimental results was collected from 17 different sources covering twelve variables was used to build and verify the predictive power of the EDT model.

12p viengfa 28-10-2024 3 1   Download

Disposed batteries contain the hazardous sources that directly impact on the environment. Proper disposal of used batteries is a vital matter because of toxit component found in types of batteries. This study focuses on the reutilization of the disposed Zn-battery graphite to produce graphene oxide (GO) via electrochemical exfoliation.

8p viling 11-10-2024 2 0   Download

This study aims to contribute to the development of a GaN/Ga2O3 diode that can be utilized in high-power device applications. The simulated device is calibrated against experimental GaN and Ga2O3 diodes, considering the effect of thickness of GaN layer and its doping concentration on the performance of GaN/Ga2O3 diodes. The band structures of devices are investigated to revial which factors that affect the properties of GaN/Ga2O3 diode.

6p viling 11-10-2024 1 0   Download

This study aims to observe the value of the dual-energy computed tomography (DECT) technique in the assessment of primary lung cancer. Compare the difference in density of lung tumors on the true non-contrast (TNC) and virtual non-contrast (VNC) images. Investigate the iodine concentration value of lung tumors in differentiating malignant and benign lesions as well as adenocarcinoma and squamous carcinoma in lung cancer.

7p viling 11-10-2024 1 0   Download

In this study, stem nodes with dorminant shoots were cultured on different media after selecting an optimized medium from experiments supplemented with BA in combination with IBA with different concentrations.

6p vifilm 11-10-2024 0 0   Download

Research the value of plasma NT - ProBNP in diagnosing acquired heart diseases in children. Objects and methods of the study: Cross-sectional descriptions of 107 patients included myocarditis, dilated cardiomyopathy, supraventricular tachycardia, and Kawasaki disease at the Vietnam National Children's Hospital.

7p vibecca 01-10-2024 1 0   Download

Determine plasma NT-ProBNP concentration in the neonatal period. Objects and methods of the study: Prospective, cross-sectional study on 96 children from 1 day to 28 days at the Vietnam National Children's Hospital. Quantifying the plasma NT-ProBP concentration and comparing between age groups, gender, and preterm – fullterm infants.

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This paper aims at proposing solutions to enhance efficiency ofthe drainage network onthe Southern bank of Huong River in Hue City in the context of climate change. Southern bank of Huong River area has an elevation of 2 to 4 meters, but in severallocations, the elevation is very low, only 0.5m. After heavy rains, some locations are flooded for several days.

8p vibecca 01-10-2024 1 1   Download

The present work deal with the propagation of a horizontally polarised shear (SH) wave in an infinitely long cylindrical structure comprised of three concentric isotropic layered media. The model has been formulated in cylindrical co-ordinates and an analytical approach is employed to achieve the closed form of the dispersion equation.

3p vibecca 01-10-2024 1 1   Download

The main objectives of the study include: i) Assessment of PAHs concentration in dust emitted from chimneys of SSI; ii) Assessment of ratio and composition of PAHs in dust samples; iii) Research on load and emission factor of PAHs from SSI.

11p vibecca 01-10-2024 5 1   Download

The study presents the evaluation results of typical PAEs (6 PAE indicators) of the PAE family in water samples from Ho Tay Lake, Hanoi. The quality of lake water in general and in Hanoi in particular is influenced by many factors. The sources of treatment in lake water such as restaurant businesses and residential areas nearby, can degrade lake water quality.

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Surfactants are one of the new pollutants of current concern worldwide. Many studies show the toxicity of surfactants to human health and microorganisms. In this study, the author conducted sampling and analyzed the concentration of pollutants in the Kim Nguu River according to the method of Kadokami.

7p vibecca 01-10-2024 1 1   Download

In this study, sixteen air samples from two small-scale household waste incinerators in Hai Hau district, Nam Dinh province, Vietnam, were collected and investigated for some pollutants such as SO2, NO2, CO, H2S, and BTEX.

8p vibecca 01-10-2024 3 1   Download

In this study, the objective was to employ experimental design in order to optimize the efficiency of diesel oil removal from water using activated carbon sourced from rambutan peel. A central composite design was utilized to investigate the impact of contact time, adsorbent dosage, initial oil concentration, and pH on both the removal efficiency and oil adsorption capacity across 30 different experimental designs.

12p vibecca 01-10-2024 0 0   Download

In this study, the authors developed a tool named ENAR (Envim Nasa Analysis Result) to help interpret GEOS-CF results provided free of charge by NASA to form PM2.5 pollution maps for each area hourly across the entire territory of Vietnam. ENAR was applied to build pollution maps for the first three months 2024.

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In the present study, experiments were conducted to assess the effects of caffeine on in vitro fertilization of pig follicular oocytes. In conclusion, a higher caffeine concentration in the fertilization medium may ensure the production of in vitro porcine embryos with acceptable productivity utilizable for further studies on this subject.

5p vibecca 01-10-2024 0 0   Download

This study was conducted to evaluate the factors contributing to the spatial distribution of European hazelnut (Corylus avellane L.) in Bhutan and determine the suitable areas for cultivation of the crop in the near future (2040-2060) and distant future (2060-2080) under different climate scenarios of Representative Concentration Pathway (RCP) 2.6 and RCP 4.5 in Bhutan.

11p vibecca 01-10-2024 2 0   Download