Synthesis of SiO@Ag Nanocomposite for Investigating Metal-Enhanced Fluorescence and Surface-Enhanced Raman Spectroscopy.

SiO@Ag nanocomposite (NC) has been synthesized by the chemical reduction and Stӧber method for Metal-enhanced fluorescence (MEF) of Rhodmine 6G (R6G) and Surface-enhanced Raman spectroscopy (SERS) of Malachite green (MG). As-synthesized SiO@Ag NC indicated SiO nanosphere (NS) and Ag nanoparticle (NP) morphologies. The SiO@Ag NC was high quality with a well-defined crystallite phase with average sizes of 24 nm and 132 nm for Ag NP and SiO NC, respectively.

Phenyl glycosides from with their antioxidant and anti-inflammatory activities.

(L.) Wettst (Plantaginaceae), is traditionally used in many countries as neural tonic and memory enhancer, or to relieve acute pain and inflammation. This study described the isolation and identification of one new, bacomoside D (), and seven known phenyl glycosides (-).

Neural Networks for Portfolio Analysis in High-Frequency Trading.

High-frequency trading proposes new challenges to classical portfolio selection problems. Especially, the timely and accurate solution of portfolios is highly demanded in financial market nowadays. This article makes progress along this direction by proposing novel neural networks with softmax equalization to address the problem.

New Dibenzocyclooctadiene Lignans and Phenolics from Kadsura heteroclite with Anti-Inflammatory Activity.

A chemical investigation of K. heteroclite led to isolation of two new dibenzocyclooctadienes (1 and 2) together with 14 known compounds (3-16) by using multiple chromatographic techniques. New compounds (1 and 2) were obtained and identified by spectroscopic methods (HR-ESI-MS, 1D and 2D NMR, and ECD) as well as by comparison of their experimental data with those reported in the literatures.

Mutation spectrum of retinoblastoma patients in Vietnam.

Background: Retinoblastoma (RB), an intraocular malignancy commonly diagnosed in children, is mostly caused by inactivating mutations of both alleles of the RB1 gene. Early genetic screening for RB1 gene mutations would greatly improve treatment outcomes and patient management.

Methods: In this study, both somatic and germline mutations were detected in blood and tumour samples of 42 RB patients using direct sequencing and multiplex ligation-dependent probe amplification.

Hybrid Electrolyte Design for High-Performance Zinc-Sulfur Battery.

Rechargeable aqueous Zn/S batteries exhibit high capacity and energy density. However, the long-term battery performance is bottlenecked by the sulfur side reactions and serious Zn anode dendritic growth in the aqueous electrolyte medium. This work addresses the problem of sulfur side reactions and zinc dendrite growth simultaneously by developing a unique hybrid aqueous electrolyte using ethylene glycol as a co-solvent.

Egret Swarm Optimization Algorithm: An Evolutionary Computation Approach for Model Free Optimization.

A novel meta-heuristic algorithm named Egret Swarm Optimization Algorithm (ESOA) is proposed in this paper, which is inspired by two egret species' hunting behavior (Great Egret and Snowy Egret). ESOA consists of three primary components: a sit-and-wait strategy, aggressive strategy as well as discriminant conditions. The learnable sit-and-wait strategy guides the egret to the most probable solution by applying a pseudo gradient estimator.

Child linear growth trajectories during the first three years of life in relation to infant iron status: a prospective cohort study in rural Vietnam.

Background: Early childhood growth patterns have long-term consequences for health and disease. Little is known about the interplay between growth and iron status during childhood. We explored the interplay between linear growth and iron status during early childhood, by assessing child growth trajectories between 6 and 36 months (m) of age in relation to infant iron status at 6 months of age.

Five new seco-labdane-type diterpenoids from Caesalpinia latisiliqua.

Five new seco-labdane-type diterpenoids, caesalatisics A-E (1-5), were isolated from the leaves of Caesalpinia latisiliqua (Cav.) Hattink. Their chemical structures were determined using 1D and 2D NMR, mass spectra, and circular dichroism spectroscopies.

Secondary metabolites from with their anti-inflammatory activity.

is hired as multiple remedies for treatment of insomnia, blood and circulatory disorders, asthma, dry cough, jaundice, seminal weakness, cardiac debility, and skin diseases in Vietnam. Our research discovered the phytochemical investigation of constituents from this herbal medicine resulted in the isolation of two new compounds (jatamansides A () and B ()) together with 16 known ones from the whole plant. Their structures were established by using spectroscopic techniques (multinuclear and multidimensional nuclear magnetic resonance, infrared, ultraviolet-visible), mass spectrometry, hydrolysis analysis, or comparing their NMR data to those reported in the literature.

Normal values for high-resolution anorectal manometry in healthy young adults: evidence from Vietnam.

Background: High-resolution anorectal manometry (HRAM) has been developed to improve measurement of anorectal functions. This study aims to identify normal HRAM values in healthy young Vietnamese adults.

Methods: We conducted a cross-sectional study at the National Hospital of Traditional Medicine (Hanoi, Vietnam) from July through December 2014.

Agallochin P, a new diterpene from Vietnamese mangrove L.

A new diterpene () along with eight known compounds (-) were isolated from leaves. The structure and relative configuration of new compound were established on the basis of spectroscopic data analysis and confirmed by NMR chemical shifts calculation with DP4+ probability. Cytotoxicity of the isolated compounds were also evaluated.

Metastable 1T'-phase group VIB transition metal dichalcogenide crystals.

Metastable 1T'-phase transition metal dichalcogenides (1T'-TMDs) with semi-metallic natures have attracted increasing interest owing to their uniquely distorted structures and fascinating phase-dependent physicochemical properties. However, the synthesis of high-quality metastable 1T'-TMD crystals, especially for the group VIB TMDs, remains a challenge. Here, we report a general synthetic method for the large-scale preparation of metastable 1T'-phase group VIB TMDs, including WS, WSe, MoS, MoSe, WSSe and MoSSe.

Garcinoxanthones SV, new xanthone derivatives from the pericarps of Garcinia mangostana together with their cytotoxic and antioxidant activities.

Xanthones (9H-xanthene-9-ones) are considered to be very promising compounds due to a variety of interesting biological and pharmacological activities. In this study, column chromatography of the methanol extract of the Garcinia mangostana L. pericarps resulted in the isolation of four new xanthones (garcinoxanthones SV, 1-4) and five known analogs including garcinone E (5), 11-hydroxy-1-isomangostin (6) mangostenone E (7), 1,3,6,7-tetrahydroxyxanthone (8), and α-mangostin (9).

High-Yield Exfoliation of Ultrathin 2D Ni Cr P S and Ni Cr P Se Nanosheets.

Multinary layered 2D nanomaterials can exhibit distinct physicochemical properties and innovative applications as compared to binary 2D nanomaterials due to their unique crystal structures. However, it still remains a challenge for the high-yield preparation of high-quality multinary 2D nanosheets. Here, the high-yield and large-scale production of two quaternary metal thiophosphate nanosheets are reported, i.

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.

Assessing the Effectiveness of Policies Relating to Breastfeeding Promotion, Protection, and Support in Southeast Asia: Protocol for a Mixed Methods Study.

Background: Despite its well-known benefits, breastfeeding practices remain suboptimal worldwide, including in Southeast Asia. Many countries in the region have thus enacted policies, such as maternity protection and the World Health Assembly International Code of Marketing of Breast-milk Substitutes (the Code), that protect, promote, and support breastfeeding. Yet the impact of such national legislation on breastfeeding practices is not well understood.

Traphanoside GO1, a new triterpenoid saponin from the aerial parts of with the inhibitory effect on PGE2 production in LPS-induced HepG2 cells.

A new saponin, 3--[-ʟ-rhamnosyl-(1→3)-D-glucopyranosyl]-28---D-glucopyranosyl serjanic acid (Traphanoside GO1, ) along with eleven compounds ( and ) were isolated from the aerial parts of . The structures of all isolates were elucidated by analyzing extensive 1 D- and 2 D-NMR and HR-ESI-MS, comparing with reported literature data. Compounds , , and 90% ethanol extract () were evaluated for the inhibitory effect on PGE2 production from activated HepG2 cells.

sp. nov., isolated from the sea surface microlayer of the Ross Sea (Antarctica).

Gram-stain-negative, aerobic and rod-shaped bacterial strains, designated SSM26 and SSM44, were isolated from a sea surface microlayer sample from the Ross Sea, Antarctica. Analysis of the 16S rRNA gene sequences of strains SSM26 and SSM44 revealed a clear affiliation with the genus . Based on the results of phylogenetic analysis, strains SSM26 and SSM44 showed the closest phylogenetic relationship with the species KCTC 22137 with the 16S rRNA gene sequence similarity level of 98.

Facilitators and barriers to a family empowerment strategy to improve healthcare worker hand hygiene in a resource-limited setting.

Objectives: The World Health Organization recommends empowering patients/families to remind healthcare workers (HCWs) to perform hand hygiene (HH). We sought to understand acceptability of a family empowerment strategy in a Vietnamese pediatric intensive care unit (PICU).

Methods: With end-user input, we designed a tool to help families in a PICU in Vietnam to remind HCWs to perform HH.

Anorectal Functional Outcomes Following Doppler-Guided Transanal Hemorrhoidal Dearterialization: Evidence from Vietnam.

Introduction: Doppler-guided transanal hemorrhoidal dearterialization (THD) was considered a less invasive and innovative method to treat hemorrhoidal disease, but it may impact the anal area during dearterialization and mucopexy. Thus, this study aimed to assess any changes in anorectal manometry of grade III and IV hemorrhoidal patients following THD treatment.

Methods: This prospective observational study was conducted with patients who had grades III and IV hemorrhoidal disease.

A family empowerment strategy is associated with increased healthcare worker hand hygiene in a resource-limited setting.

Background: Guidelines recommend empowering patients and families to remind healthcare workers (HCWs) to perform hand hygiene (HH). The effectiveness of empowerment tools for patients and their families in Southeast Asia is unknown.

Methods: We performed a prospective study in a pediatric intensive care unit (PICU) of a Vietnamese pediatric referral hospital.

Controllable growth of Au nanostructures onto MoS nanosheets for dual-modal imaging and photothermal-radiation combined therapy.

Multifunctional theranostic nanoagents are attractive to realize comprehensive imaging and effective treatment of tumours. Herein, a novel strategy is developed to controllably guide the epitaxial growth of gold nanostructures onto MoS nanosheets. The as-prepared MoS-Au nanostructures (MA) manifest an enhanced near-infrared (NIR) absorbance with strong photostability.

Linearly Polarized Luminescence of Atomically Thin MoS Semiconductor Nanocrystals.

Atomically thin layers of transition-metal dichalcogenides semiconductors, such as MoS, exhibit strong and circularly polarized light emission due to inherent crystal symmetries, pronounced spin-orbit coupling, and out-of-plane dielectric and spatial confinement. While the layer-by-layer confinement is well-understood, the understanding of the impact of in-plane quantization in their optical spectrum is far behind. Here, we report the optical properties of atomically thin MoS colloidal semiconductor nanocrystals.