Vertical distributions and risk assessment of phosphorus in core sediments from the Can Gio coastal district in southern Vietnam.

In this study, total phosphorus (P) and P released forms were measured in core sediments from the areas affected by human settlement and shrimp farming activities and the core zone of the Can Gio Biosphere Reserve, a coastal district in south Vietnam. Furthermore, ecological risk assessment and parameters controlling P release from sediments were investigated, including pH, major elements (Al-Ca-Mg-Fe), and fine fraction. The average total amount of P in the sediments varied from 287 to 669 mg/kg, with significantly lower values being observed in the mangrove biosphere reserve area.

The Growth of Extended Melem Units on g-CN by Hydrothermal Treatment and Its Effect on Photocatalytic Activity of g-CN for Photodegradation of Tetracycline Hydrochloride under Visible Light Irradiation.

In this work, the growth of extended tri-s-triazine units (melem units) on g-CN (CN) by hydrothermal treatment and its effect on the photodegradation efficiency of tetracycline hydrochloride (TC) is investigated. The CN-180-x and CN-200-6 samples were prepared using different hydrolysis times and temperatures, and they were characterized by multiple physicochemical techniques. In addition, their photodegradation performance was evaluated under visible light irradiation.

Mutation spectrum of gene in pediatric patients with Wilson disease in Vietnam.

Background: Wilson disease (WD) is caused by mutations in the copper-transporting P-type adenosine triphosphatase encoded by the gene. In this study, we screened and identified the mutations among unrelated Vietnamese pediatric patients.

Methods: One-hundred-thirteen pediatric patients with clinically diagnosed WD were recruited.

Solvent Etching Process for Graphitic Carbon Nitride Photocatalysts Containing Platinum Cocatalyst: Effects of Water Hydrolysis on Photocatalytic Properties and Hydrogen Evolution Behaviors.

In this study, we synthesized Pt/g-CN photocatalysts modified by a solvent etching process where ethanol (Pt/CN0), water (Pt/CN100), and a 50:50 mixture (Pt/CN50) were used as a solvent, and investigated the optimal properties of g-CN to prepare the best Pt/g-CN for photocatalytic hydrogen evolution. From diverse characterizations, water was proven to be a stronger solvent agent, resulting in not only the introduction of more O-functional groups onto the g-CN surface, but also the degradation of a regular array of tri-s-triazine units in the g-CN structure. While the addition of O-functional groups positively influenced the oxidation state of the Pt cocatalyst and the hydrogen production rate, the changes to g-CN structure retarded charge transfer on its surface, inducing negative effects such as fast recombination and less oxidized Pt species.

Nasalance scores for Vietnamese-speaking children with oral clefts.

Objective: The study aimed to obtain nasalance scores for Vietnamese-speaking patients with repaired cleft palate with or without cleft lip.

Methods: A total of 29 children with cleft palate with or without cleft lip (4-18 years old, mean age 7.9±3.

Normative nasalance scores for Vietnamese-speaking children.

Objective: The Nasometer is increasingly being used to complement auditory perceptual assessment of nasality. Nasalance scores which are obtained from the Nasometer vary across languages. Normative nasalance scores have been established for many languages but not for the Vietnamese language.

Simple analysis of total mercury and methylmercury in seafood using heating vaporization atomic absorption spectrometry.

This study aimed to develop a simpler method for determining total mercury (T-Hg) and methylmercury (MeHg) in biological samples by using methyl isobutyl ketone (MIBK) in the degreasing step. The fat in the samples was extracted by MIBK to the upper phase. T-Hg transferred into the water phase.