Vietnam

Having started the exploration of rare earth elements (REE) since the early 1958 and currently ranked the second in the world in term of REE potential, only after China, the REE exploration and production industry in Vietnam is still in an early stage of exploration and production due to a number of reasons, including lacks of investment, testing and mining experiences, up-to-date technology, good development policy and adequate guidance regulations.

7p viellison 06-05-2024 2 2   Download

This paper gives some preliminary findings and an understanding of characteristics such as nature, environment, and biomes, as well as their roles in marine biomes of landforms. We also proposed calling this terrain type “sea hill”, and the accompanying “sea hill ecosystem” in Vietnam’s nearshore.

16p dianmotminh02 03-05-2024 1 1   Download

This article will outline the justification and implications of this taxonomic reclassification for the species formerly known as Cymodocea serrulata. We will examine the reasons for the name change, provide background on the new genus Oceana, and discuss potential impacts on future research. The goal is to clarify why this change was made and what it signifies for our scientific understanding of the species.

9p dianmotminh02 03-05-2024 2 1   Download

This study has provided the most comprehensive update on the mosquito fauna in urban areas of Ha Noi city based on the systematic selection of sampling habitats. Most of the sampling sites were occupied by mosquito larvae or pupae. The diversity of mosquito species varied between sites and was associated with the types of breeding habitats at each site.

12p dianmotminh02 03-05-2024 1 1   Download

Micro-sized luffa cylindrica fibers (MLCFs) are made from raw luffa natural fibers from Vietnam and are environmentally friendly while possessing good mechanical strength. This work focuses on the mechanical properties of composite based on epoxy epikote 828 reinforced with MLCFs, particularly the fracture toughness.

8p dianmotminh02 03-05-2024 2 1   Download

The molecular data of D2-D3 of 28S rRNA region, morphometrics, and morphological features of second-stage juveniles, males, and females in the present study have confirmed that the root-knot nematode recovered from pomelo in Vietnam belongs to M. enterolobii. To the best of our knowledge, this represents the first report of M. enterolobii infecting pomelo, providing new insight into the host status of this important pest.

10p dianmotminh02 03-05-2024 1 1   Download

With the aim of inferring phylogenetic relationships among 86 species (including 45 species from Vietnam) mostly of the subfamily Convallarioideae (=Nolinoideae) (Asparagaceae sensu APG IV), we analyzed their chloroplast DNA sequences (rbcL and trnL-F) by both Bayesian inference (BI) and maximum likelihood (ML) methods. Our dataset included six of the seven tribes classified in this subfamily; Convallarieae, Dracaeneae, Liriopeae Nolineae, Polygonateae and Rusceae (Eriospermeae not examined).

17p dianmotminh02 03-05-2024 2 1   Download

Cathelicidins include antimicrobial peptides (AMPs) and are involved in the innate immune defense against infections in mammals. Polymorphisms in the DNA sequence of cathelicidin genes could be relevant to inherited variations of host innate immunity, adaptation, and pathogen resistance. This study aims to investigate the sequence polymorphism of cathelicidin genes including CATHL2 and CATHL4 from local indigenous yellow cattle breeds of Vietnam.

11p dianmotminh02 03-05-2024 0 0   Download

Creating a marine spatial planning map (MSP) guides the determination of the map's extent and scale, the map, the content of the map, the methods and techniques of mapping, and the sequence of steps performed. The Gulf of Tonkin (region I) is divided into 6 functional zones, including Mong Cai - Do Son one. This area is established MSP Map at scale 1:250,000 as a reference example, showing 3 functional areas and 7 basic units using marine space.

18p dianmotminh02 03-05-2024 4 1   Download

The needle and cone essential oils of Pinus fenzeliana Hand-Mazz. (Pinus kwangtungensis Chun & Tsiang) collected in Hang Kia-Pa Co Nature Reserve, Hoa Binh province were obtained by hydrodistillation and analyzed by a combination of GC-FID, GC-MS and NMR (Gas Chromatography/Gas Chromatography-Mass Spectrometry/Nuclear Magnetic Resonance (NMR) analysis).

9p dianmotminh02 03-05-2024 2 1   Download

The study found that nematode composition differed significantly between the upper and deeper layers of sediment but not among the deeper layers. Nematode density showed spatial variability across layers, with higher values in the upper layer. Nematode diversity decreased with increasing depth. Non–selective deposit feeders (1B) were dominated in the surface layers, while the predator–omnivores feeders (2B) was numerous in the deeper layers

18p dianmotminh02 03-05-2024 2 1   Download

The present work provides a taxonomic key to the genera of Polygonaceae found in Vietnam. It also reports the first occurrence of Persicaria runcinata in Lai Chau province, extending its known distribution within the country. Detailed photographic illustrations of the specimens studied accompany the findings. This extended distribution of P. runcinata could hold significant conservation implications, emphasizing the importance of further research and conservation efforts in the region.

6p dianmotminh02 03-05-2024 2 1   Download

n this work, the main aim is to map the potential zones of groundwater in Central Highlands (Vietnam) using a novel ensemble machine learning model, namely CG-LMT, which is a combination of two advanced techniques, namely Cascade Generalization (CG) and Logistics Model Trees (LMT). For this, a total of 501 wells data and a set of twelve affecting factors were gathered and selected to generate training and testing datasets used for building and validating the model.

10p dianmotminh02 03-05-2024 3 1   Download

Forest fires present a significant threat to the tropical forest ecosystem in the northwestern region of Vietnam. Our study aimed to assess the impacts of environmental factors on forest fire occurrence and to map forest fire probability for the whole region. The forest fire occurrence data over the period 2003–2016, environmental factors (climate, fuel condition, topography, and human activity), and the MaxEnt approach were used for this study.

21p dianmotminh02 03-05-2024 3 1   Download

This study also compares the predictive capability of these models to the model using average annual rainfall data that was widely used in previous studies. Finally, the best model fit is used for landslide spatial prediction mapping.

19p dianmotminh02 03-05-2024 2 1   Download

Cuc Phuong is the oldest and most well-known National Park in Vietnam. With its large primary forest area and karst cave systems, it is assumed to be an ideal home to a highly diverse bat fauna. However, species diversity and echolocation of bats in this park are poorly characterized. Between April 2021 and April 2022, three bat surveys were conducted in the park with special attention on the species of the family Hipposideridae. The bat specimens collected previously from the park were also examined. A

9p dianmotminh02 03-05-2024 2 1   Download

This study aims to explore the transmission of pollutants from the domestic wastewater of the Rach Tram - Phu Quoc eco-urban project. To achieve this, the Ecolab module of the Mike model is employed. The dispersion of pollutants is influenced by both hydraulic and wind conditions. Notably, under southwest wind condition, the dispersion of pollutants is considerably more pronounced compared to that observed during the Northeast monsoon.

16p dianmotminh02 03-05-2024 2 1   Download

This paper analyzes a monthly global gridded sea-surface wind dataset from Jan 1991 to Dec 2020, sourced from the International Comprehensive Ocean-Atmosphere Data Set (ICOADS). The goal is construct schematic maps depicting the monthly average distributions of sea-surface wind speeds and directions in the East Vietnam Sea.

10p dianmotminh02 03-05-2024 3 1   Download

In recent years, Vietnam freight forwarding industry is growing and contributing significantly to the national GDP. However, the efficiency in providing service delivery at the domestic firms is not high to compete with multinational companies that are strong potential and finance. There have been many studies on freight forwarding, but mainly qualitative research and other studies are in-depth analysis logistics. T

7p longtimenosee10 26-04-2024 0 0   Download

The 781m twin tunnel in line No 1 Ben Thanh – Suoi Tien was the first tunnels constructed by Earth Pressure Balance Tunnel Boring Machine (EPB TBM) in the urban area in Ho Chi Minh City, Vietnam. Field data on a surface settlement at three sections, measured during the construction period from May 2017 to June 2018, are used for back analyses on the development of surface settlement with the corresponding advancement of the EPB TBM.

8p viohoyo 25-04-2024 1 0   Download