New dihydrophenanthrenes from .

Three new dihydrophenanthrenes were isolated from the whole plant of collected in Vietnam. These compounds were identified as 2,3,5-trihydroxy-9,10-dihydrophenanthrene (), 2-methoxy-5-hydroxy-9,10-dihydrophenanthrene 3-O--D-glucopyranoside (), and 2,5-dihydroxy-9,10-dihydrophenanthrene 3-O--D-glucopyranoside (). Their structures were determined by HR-ESI-MS and 1D, 2D NMR spectroscopy.

Identification of Insertion/Deletion Markers for Photoperiod Sensitivity in Rice ( L.).

The current study aims to identify candidate insertion/deletion (INDEL) markers associated with photoperiod sensitivity (PS) in rice landraces from the Vietnamese Mekong Delta. The whole-genome sequencing of 20 accessions was conducted to analyze INDEL variations between two photoperiod-sensitivity groups. A total of 2240 INDELs were identified between the two photoperiod-sensitivity groups.

Brookite TiO as an active photocatalyst for photoconversion of plastic wastes to acetic acid and simultaneous hydrogen production: Comparison with anatase and rutile.

Photoreforming is a clean photocatalytic technology for simultaneous plastic waste degradation and hydrogen fuel production, but there are still limited active and stable catalysts for this process. This work introduces the brookite polymorph of TiO as an active photocatalyst for photoreforming with an activity higher than anatase and rutile polymorphs for both hydrogen production and plastic degradation. Commercial brookite successfully converts polyethylene terephthalate (PET) plastic to acetic acid under light.

Identify Primary Air Pollution Sources of BTEX by Using Positive Matrix Factorization (PMF): A Case Study of Ho Chi Minh City, Vietnam.

Ho Chi Minh City (HCMC) is one of the main socioeconomic and financial centers of Vietnam. The city also faces serious air pollution. However, the city polluted with benzene, toluene, ethylbenzene, and xylene (BTEX) has rarely been studied.

An ecological economic comparison between integrated rice-fish farming and rice monocultures with low and high dikes in the Mekong Delta, Vietnam.

This study makes an ecological economic comparison between three different rice farming strategies in the Mekong Delta. Interviews were made with 30 farmers with two crops of rice and low dikes (2RLd), 30 farmers with three crops of rice and high dikes (3RHd) and 18 farmers with two crops of rice and one crop of fish (2RF). 2RF farmers had the highest annual net income and benefit cost ratio, because of low production costs and high yields of rice and fish.

Stakeholders assessment of status and trends of ecosystem services in the Mekong Delta for improved management of multifunctional wetlands.

Increased agriculture and aquaculture production in the Mekong Delta during the last two decades has improved farmers' income, national export earnings and reduced poverty, but has also impacted on the environment and ecosystem services (ES) of importance to peoples' livelihoods and well-being. Through group discussions, interviews and questionnaires, this study assesses stakeholders' perceptions of the status and trends of ES in the Mekong Delta and how these have been influenced by agriculture development. 15 of 24 ES were assessed to be impacted negatively by agriculture intensification, and especially supporting and regulating ES (SRES).

Assessing the accuracy of the International Academy of Cytology Yokohama System for reporting breast fine needle aspiration biopsy cytology at a Vietnamese oncology centre.

Background: Fine needle aspiration biopsy (FNAB), accompanied by classification systems for cytology, can offer a cheap and convenient option for the diagnosis of breast cancer in women with suspicious breast lumps. In this study, we aimed to assess the accuracy of the International Academy of Cytology (IAC) Yokohama system in a Vietnamese oncology centre.

Methods: A retrospective cross-sectional study was conducted from November 2021 to April 2022 at Vietnam National Cancer Hospital.

An Innovative Method for BTEX Emission Inventory and Development of Mitigation Measures in Developing Countries-A Case Study: Ho Chi Minh City, Vietnam.

Benzene, toluene, ethylbenzene, and xylenes (BTEX) are carcinogenic pollutants. However, the average concentration in 1 h of some pollutants belonging to BTEX, such as benzene, in Ho Chi Minh City (HCMC) is higher than the national standard QCVN 06:2009/BTNMT by about ten times. This research is the first to calculate the emission of BTEX for developing countries on a city scale.

Chemical constituents of and their -glucosidase inhibition activity.

The first chemical study of the whole S. X. Yu & Y.

Origin of novel coronavirus causing COVID-19: A computational biology study using artificial intelligence.

Origin of the COVID-19 virus (SARS-CoV-2) has been intensely debated in the scientific community since the first infected cases were detected in December 2019. The disease has caused a global pandemic, leading to deaths of thousands of people across the world and thus finding origin of this novel coronavirus is important in responding and controlling the pandemic. Recent research results suggest that bats or pangolins might be the hosts for SARS-CoV-2 based on comparative studies using its genomic sequences.

Levofloxacin degradation under visible-LED photo-catalyzing by a novel ternary Fe-ZnO/WO nanocomposite.

As semiconductor photocatalysts showing their efficient redox ability upon illumination, new development of materials to enhance the pollution degradation is gaining popularity, especially on their oxidation ability. In this study, a highly stable ternary Fe-ZnO/WO nanocomposite photocatalyst has been synthesized in order to improve charge transfer of photocatalytic oxidation under 30W LED light (425-470 nm) to efficiency degrade the Levofloxacin (LVF) in the solution. This catalyst was characterized and analyzed by XRD, FE-SEM, HR-TEM, X-ray XPS, UPS, PL, TRPL, LSV, EIS, and Photocurrent.

Prevalence and Genetic Relationship of Predominant Serotypes Isolated from Poultry, Wild Animals, and Environment in the Mekong Delta, Vietnam.

Avian pathogenic (APEC) is the main causative agent of avian colibacillosis, which is an important systemic disease of profound economic and clinical consequences for the poultry industry worldwide. In this study, 975 strains were isolated from 2,169 samples collected from cloacal swabs of chickens, in-farm wild animals (ants, geckos, flies, and rats), and environment. The highest proportion of isolation was obtained from chicken cloacal swabs with 71.

Chemical constituents of Tard. and their -glucosidase inhibition activities.

Sixteen compounds (-) were isolated from . Chemical structures were determined by spectroscopic analyses and comparisons with previously published data. This report is the first to identify compounds , , , , and from the genus Seven chosen isolates (, , , , , , and ) were submitted for -glucosidase inhibition assays with acarbose as the positive control (IC = 227.

Recyclable waste collection by informal sector in Vietnam: Dataset from Vinh, Nha Trang, Buon Ma Thuot, Da Nang, Ho Chi Minh and Hanoi Cities.

Even though the matter was not widely acknowledged, informal recycling plays a vital role in waste treatment in many developing countries. In Vietnam, the management of waste collection and treatment faces many difficulties, as there is no statistical data or description of the informal sector in waste collection and recycling to clarify their role, their scale, and their capacity. This paper presents the preliminary data processed by informal waste collectors and aggregators in six Vietnamese cities, namely, Vinh, Nha Trang, Buon Ma Thuot, Da Nang, Ho Chi Minh, and Hanoi.

Synthesis of ZnO/Au Nanorods for Self Cleaning Applications.

Zinc oxide (ZnO) is a well-known semiconductor with valuable characteristics: wide direct band gap of ˜3.3 eV, large exciton binding energy of 60 meV at room temperature, high efficient photocatalyst, etc. which have been applied in many fields such as optical devices (LEDs, laser), solar cells and sensors.

Improved Synthesis of Ag/SiO₂ Colloidal Nanocomposites and Their Antibacterial Activity Against 15.

Ag/SiO₂ colloidal nanocomposites (NCs) were prepared through the semi-continuous chemical reduction of silver ions on a silica surface; NaBH4 was used as a primary reducing agent, while carboxymethyl cellulose (CMC) served as a secondary reductant and a stabilizer at low temperature. Silver nanoparticles (AgNPs) of an average diameter of 3.89±0.

New phenolics from (L.) DC.

Reinvestigation of a methanol extract of afforded a new 3- hydroxyisoflavanone, 3,5,7,2',4'-pentahydroxyisoflavanone (), two new monoaryl glucosides, 3,4-dimethoxyphenyl 1--(6'--acetyl)--D-glucopyranoside ( and 3,4,5-trimethoxyphenyl 1--(6'--acetyl)--D-glucopyranoside (), in addition to three known compounds, 3'--methylorobol (), robusflavone B (), and apigenin (). The structural elucidation of these compounds was achieved by analyses of their spectroscopic data (HR-ESI-MS, 1 D- and 2 D-NMR) and acidic hydrolysis. The extracts and compounds - exhibited weak or no cytotoxic activity against KB, HepG2, Lu and MCF7 cell lines.

Profiling SNP and Nucleotide Diversity to Characterize Mekong Delta Rice Landraces in Southeast Asian Populations.

Single nucleotide polymorphism (SNP) analyses are a powerful tool to examine structure of local rice population. 3000 dataset of IRRI facilitates SNP profiling of Southeast Asian rice populations. Mekong Delta population is featured by comparisons with the other populations.

Cytotoxic and Anti-Plasmodial Activities of Y.C. Wu Extracts and the Isolated Compounds.

Natural products remain a viable source of novel therapeutics, and as detection and extraction techniques improve, we can identify more molecules from a broader set of plant tissues. The aim of this study was an investigation of the cytotoxic and anti-plasmodial activities of the methanol extract from Y.C.

Cell Growth Inhibition of Saponin XII from Miq. on Acute Myeloid Leukemia Cells.

In previous studies, we isolated the known compound saponin XII from the roots of Miq. Here, we show that this compound reduced the number of acute myeloid leukemia OCI-AML3 cells as evaluated by a hemocytometer. Flow cytometry analyses demonstrated that the reported activity was associated with a significant increase of apoptosis and of cells in the G/G phase of the cell cycle, with a decrease of cells in the S and G/M phases.