Enhanced acetone gas-sensing characteristics of Pd-NiO nanorods/SnO nanowires sensors.

Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas, but it can cause dangerous effects on human health. Thus, the fabrication of highly sensitive and selective sensors for recognition of acetone is incredibly important. Here, we prepared the SnO/Pd-NiO (SPN) nanowires-based gas sensor for the detection of acetone, in which, the amount of Pd nanoparticles were varied to enhance the performance of the devices.

Genomic and vaccine preclinical studies reveal a novel mouse-adapted model for the hpEastAsia genotype in Southeast Asia.

infection is a major global health concern, linked to the development of various gastrointestinal diseases, including gastric cancer. To study the pathogenesis of and develop effective intervention strategies, appropriate animal pathogen models that closely mimic human infection are essential. This study focuses on the understudied hpEastAsia genotype in Southeast Asia, a region marked by a high infection rate.

Synthesis of Biodegradable and Antimicrobial Nanocomposite Films Reinforced for Coffee and Agri-Food Product Preservation.

The antimicrobial activity of silver nanoparticles is widely known. However, their application to biodegradable polymeric materials is still limited. In this work, we report a strategy involving the green synthesis of nanocomposite films based on a natural biodegradable matrix.

Prophylactic immunization to Helicobacter pylori infection using spore vectored vaccines.

Background: Helicobacter pylori infection remains a major public health threat leading to gastrointestinal illness and increased risk of gastric cancer. Mostly affecting populations in developing countries no vaccines are yet available and the disease is controlled by antimicrobials which, in turn, are driving the emergence of AMR.

Materials And Methods: We have engineered spores of Bacillus subtilis to display putative H.

A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates.

As a source of clean energy, hydrogen (H) is a promising alternative to fossil fuels in reducing the carbon footprint. However, due to the highly explosive nature of H, developing a high-performance sensor for real-time detection of H gas at low concentration is essential. Here, we demonstrated the H gas sensing performance of Ag/Pd nanoparticle-functionalized ZnO nanoplates.

Mapping chicken production and distribution networks in Vietnam: An analysis of socio-economic factors and their epidemiological significances.

The growing chicken industry in Viet Nam has an increasingly important contribution to the country's food security, but its development requires careful planning to prevent disease risks. This study characterizes the chicken production and distribution networks in Vietnam and identifies potential factors that could promote disease emergence and transmission. Qualitative data were collected from interviews with 29 key informants from five stakeholder groups representing the main nodes from chicken production and distribution networks (PDN).

Room Temperature Ammonia Gas Sensor Based on p-Type-like VO Nanosheets towards Food Spoilage Monitoring.

Gas sensors play an important role in many areas of human life, including the monitoring of production processes, occupational safety, food quality assessment, and air pollution monitoring. Therefore, the need for gas sensors to monitor hazardous gases, such as ammonia, at low operating temperatures has become increasingly important in many fields. Sensitivity, selectivity, low cost, and ease of production are crucial characteristics for creating a capillary network of sensors for the protection of the environment and human health.

sp. nov., the First Novel Marine Fungi Species Described from Vietnam with a Unique Conidiophore Structure and Molecular Phylogeny of Section .

sp. nov. was isolated from Nha Trang Bay, Vietnam in June 2017.

Hollow ZnO nanorices prepared by a simple hydrothermal method for NO and SO gas sensors.

Chemoresistive gas sensors play an important role in detecting toxic gases for air pollution monitoring. However, the demand for suitable nanostructures that could process high sensing performance remains high. In this study, hollow ZnO nanorices were synthesized by a simple hydrothermal method to detect NO and SO toxic gases efficiently.

Biodiversity and Enzyme Activity of Marine Fungi with 28 New Records from the Tropical Coastal Ecosystems in Vietnam.

The coastal marine ecosystems of Vietnam are one of the global biodiversity hotspots, but the biodiversity of marine fungi is not well known. To fill this major gap of knowledge, we assessed the genetic diversity (ITS sequence) of 75 fungal strains isolated from 11 surface coastal marine and deeper waters in Nha Trang Bay and Van Phong Bay using a culture-dependent approach and 5 OTUs (Operational Taxonomic Units) of fungi in three representative sampling sites using next-generation sequencing. The results from both approaches shared similar fungal taxonomy to the most abundant phylum (Ascomycota), genera ( and ) and species () but were different at less common taxa.

Marine and brackish D.G.Mann (Bacillariophyta) species from the Java Sea and South China Sea coasts with the description of three new species.

In this study, samples were collected from the Java Sea coasts, from the South China Sea in Hainan Island coasts and Quảng Yên region and Rú Chá mangrove near Hue in Central Vietnam. In studied samples a total of eight species have been observed. Three of the taxa studied are described herein as species new to science - , and Under light microscopy (LM) and are similar with rhombic-lanceolate to rhombic/ elliptic-lanceolate to elliptic valve shapes and narrowly rounded apices.

Convergence of and Mutant Genes in Soybean Confers Synergistic Resistance to Herbicide and Insects.

Soybean is a globally important crop species, which is subject to pressure by insects and weeds causing severe substantially reduce yield and quality. Despite the success of transgenic soybean in terms of () and herbicide tolerance, unforeseen mitigated performances have still been inspected due to climate changes that favor the emergence of insect resistance. Therefore, there is a need to develop a biotech soybean with elaborated gene stacking to improve insect and herbicide tolerance in the field.

Controlled Growth of Indium Oxide Nanowires for Gas Sensing Application.

Background: The InO nanowires have attracted enormous attention for gas sensor application due to their advantageous features. However, the controlled synthesis of InO nanowires for gas sensors is vital and challenging because the gas sensing performance of the nanowires is strongly dependent on their characteristics.

Methods: Here in this patent, we fabricated InO nanowires on SiO/Si substrate via a simple thermal vapor deposition method with the Au thin film as the catalyst.

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient.

The response of a single tin oxide nanowire was collected at different temperatures to create a virtual array of sensors working as a nano-electronic nose. The single nanowire, acting as a chemiresistor, was first tested with pure ammonia and then used to determine the freshness status of trout fish () in a rapid and non-invasive way. The gas sensor reacts to total volatile basic nitrogen, detecting the freshness status of the fish samples in less than 30 s.

MoS nanosheets-decorated SnO nanofibers for enhanced SO gas sensing performance and classification of CO, NH and H gases.

The effect of MoS nanosheet (NS) decoration on the gas-sensing properties of SnO nanofibers (NFs) was investigated. The decorated sensors were fabricated by facile on-chip electrospinning technique and subsequently dropping MoS NSs-dispersed solution. The MoS NS decoration resulted in enhanced the response and reduced the operating temperature of SnO NFs towards SO gas.

Enhanced NH and H gas sensing with HS gas interference using multilayer SnO/Pt/WO nanofilms.

The selective detection and classification of NH and HS gases with HS gas interference based on conventional SnO thin film sensors is still the main problem. In this work, three layers of SnO/Pt/WO nanofilms with different WO thicknesses (50, 80, 140, and 260 nm) were fabricated using the sputtering technique. The WO top layer were used as a gas filter to further improve the selectivity of sensors.

Gas sensing materials roadmap.

Gas sensor technology is widely utilized in various areas ranging from home security, environment and air pollution, to industrial production. It also hold great promise in non-invasive exhaled breath detection and an essential device in future internet of things. The past decade has witnessed giant advance in both fundamental research and industrial development of gas sensors, yet current efforts are being explored to achieve better selectivity, higher sensitivity and lower power consumption.

Dip-coating decoration of AgO nanoparticles on SnO nanowires for high-performance HS gas sensors.

SnO nanowires (NWs) are used in gas sensors, but their response to highly toxic gas HS is low. Thus, their performance toward the effective detection of low-level HS in air should be improved for environmental-pollution control and monitoring. Herein, AgO nanoparticle decorated SnO NWs were prepared by a simple on-chip growth and subsequent dip-coating method.

Controlled synthesis of ultrathin MoS nanoflowers for highly enhanced NO sensing at room temperature.

Fabrication of a high-performance room-temperature (RT) gas sensor is important for the future integration of sensors into smart, portable and Internet-of-Things (IoT)-based devices. Herein, we developed a NO gas sensor based on ultrathin MoS nanoflowers with high sensitivity at RT. The MoS flower-like nanostructures were synthesised a simple hydrothermal method with different growth times of 24, 36, 48, and 60 h.

Self-heated Ag-decorated SnO nanowires with low power consumption used as a predictive virtual multisensor for HS-selective sensing.

Multisensor systems with low-power consumption are emerging for the Internet of Things. In this work, we demonstrate the use of self-heated networked Ag-decorated SnO NW sensors integrated into a portable module for selective detection of HS gas at low power consumption, and the integrated system is simulated as a virtual multisensor under varying heating powers for identifying and quantifying different reducing gases. The HS gas-sensing characterisations at the different self-heating powers of 2-10 mW showed that the gas response significantly increased with the increase in Ag density decoration and the heated power strongly affected the gas-sensing performance and sensor stability.

An effective HS sensor based on SnO nanowires decorated with NiO nanoparticles by electron beam evaporation.

The highly toxic hydrogen sulphide (HS) present in air can cause negative effects on human health. Thus, monitoring of this gas is vital in gas leak alarms and security. Efforts have been devoted to the fabrication and enhancement of the HS-sensing performance of gas sensors.

Magnetic iron oxide nanoparticles decorated graphene for chemoresistive gas sensing: The particle size effects.

We report a synthesis of magnetic nanoparticles chemically immobilized onto reduced graphene oxide sheets (referred to as rGO-FeO NPs) as a gas and vapor sensing platform with precisely designed particle size of 5, 10 and 20 nm to explore their influence of particle size on sensing performance. The rGO-FeO NP sensors have been investigated their responses to different gases and volatile organic compounds (VOCs) at part-per-million (ppm) levels. Results show that the FeO NPs with smaller size (5 and 10 nm) on the rGO surface led to a lower sensitivity, while particles of a size of 20 nm have a significant enhancement of sensitivity compared to the bare rGO sensor.

Complete mitogenome of , the red chut-chut snail from the Cần Giờ Mangrove in Vietnam.

We sequenced the complete mitogenome of the red chut-chut snail , from the Cần Giờ mangrove in Vietnam. The mitogenome is 15,708 bp long. It is colinear with the mitogenomes of other members of the superfamily Cerithioidea, and the maximum-likelihood phylogeny obtained with the 1, 2 and 3 genes of several Caenogastropoda associated all Cerithioidea together inside a strongly supported clade.