285 results match your criteria: "Vinh University[Affiliation]"

The smallest triple ring tube-like gold clusters M@Au with M = Mo, W and = 1, 0, -1 are reported for the first time. Incorporation of an M dimer results in a remarkable modification of both atomic and electronic structures of the gold host. While the bare Au cluster exhibits a 3D cage shape, the doubly doped clusters M@Au in all charge states are found to prefer a tubular form composed of three five-membered Au rings in an anti-prism arrangement and stabilized by an M unit placed inside the tube-like Au gold framework.

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In this study, essential oils and waste hydrosols of leaves of Ocimum tenuiflorum in four different geographical locations were extracted by hydrodistillation method and using gas chromatography/mass spectrometry (GC/MS) for chemical composition analysis. All four essential oil samples contained the main components (E)-β-caryophyllene (27.8-49.

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Implementing the ultrasonic vibration-assisted incremental sheet-forming (UISF) process has been proven to significantly reduce the forming force, improve the surface quality, and enhance the accuracy of the sheet-forming process. However, such effectiveness has primarily focused on easily deformable materials (such as AA1050 and AA1060 aluminum alloys) and small step-down sizes (from 0.3 mm to 0.

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Recent advances in biosensors for screening plant pathogens.

Anal Methods

July 2024

BioNano Applications Research Center, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si 13120, Republic of Korea.

Article Synopsis
  • Plant pathogens have caused significant economic losses in agriculture, especially during periods of agricultural intensification, prompting the need for better disease analysis methods.
  • Biosensors have become key tools for on-field diagnosis of plant diseases due to their high sensitivity, selectivity, cost-effectiveness, portability, and ease of use compared to traditional methods.
  • The review covers common biotic plant diseases caused by fungi, bacteria, and viruses, and discusses recent advancements in biosensor technology for plant disease detection.
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Manganese oxides (MnO) have been widely applied in various chemical industrial processes owing to their long lifetime, low cost and high abundance. They have been used as co-reactants for the elimination of volatile organic compounds (VOCs); however, their oxidation mechanism is not clearly established. In this theoretical study, interaction capacities between benzene (CH) and MnO clusters, which were modeled with MnO and MnO molecules, were investigated by quantum chemical computations using density functional theory (DFT) with the PBE-D3 functional.

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Sprouted rough rice as an alternative to corn for growth, health performance and meat quality of broilers.

Saudi J Biol Sci

August 2024

Department of Animal Science and Veterinary Medicine, School of Agriculture and Aquaculture, Tra Vinh University, Tra Vinh Province, Viet Nam.

Sprouted rough rice (SR) is not commly used for poultry diets but it could be a potential replacement ingredient to improve nutritional value of feed. This study aimed to evaluate the growth performance, carcass quality, blood lipids, hepatic enzymes, and fatty acid profiles of broiler meat when corn was replaced with sprouted rough rice in the feed. A completely randomized design was used with four groups and six replicate groups with 10 birds per replicate.

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Graphitic carbon nitride supported silver nanoparticles (AgNPs/g-CN) with 1%, 3%, and 5% AgNPs were successfully synthesized by an "" method with ultrasound of a mixture of AgNP solution and g-CN. The AgNP solution was prepared by chemical reduction with trisodium citrate, and g-CN was synthesized from the urea precursor. The supported nanoparticles were characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption (BET), Fourier transformation infrared (FTIR) and Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence spectroscopy (PL), electron paramagnetic resonance (EPR) and electrochemical impedance spectroscopy (EIS) Nyquist plots.

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Eight furostanol glycosides including five undescribed compounds, named tribufurostanosides A-E (1-5), and three known ones (6-8) were isolated from the fruits of Tribulus terrestris L. Their chemical structures were determined by the IR, HR-ESI-MS, 1D-, and 2D-NMR spectra. Furostanols 1-8 significantly inhibited nitric oxide production in LPS activated RAW 264.

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Recently, agriculture systems have faced numerous challenges involving sustainable nutrient use efficiency and feeding, environmental pollution especially heavy metals (HMs), infection of harmful microorganisms, and maintenance of crop production quality during postharvesting and packaging. Nanotechnology and nanomaterials have emerged as powerful tools in agriculture applications that provide alternatives or support traditional methods. This review aims to address and highlight the current overarching issue and various implementation strategies of nanotechnology for sustainable agriculture development.

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Objective: The aim of the present pilot study was to assess the effectiveness of the platelet-rich fibrin (PRF) apical barrier for the placement of MTA for the treatment of teeth with periapical lesions and open apices.

Methods: A total of thirty teeth on twenty-eight patients with open apices and periapical periodontitis were enrolled and divided into two groups in the present pilot study. In the PRF group (fourteen teeth in thirteen patients), nonsurgical endodontic treatment was performed using PRF as an apical matrix, after which the apical plug of the MTA was created.

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Efficacy of Annona glabra extract against acute hepatopancreatic necrosis disease in white-leg shrimp (Penaeus vannamei).

J Invertebr Pathol

July 2024

Department of Science and Technology, HUTECH University, 475A Dien Bien Phu Street, Ward 25, Binh Thanh District, Ho Chi Minh City 700000, Viet Nam. Electronic address:

Article Synopsis
  • This study explores the potential of pond apple (Annona glabra) compounds to prevent and treat acute hepatopancreatic necrosis disease (AHPND) in shrimp by examining the effectiveness of different leaf extracts against Vibrio parahaemolyticus.
  • The methanol extract of A. glabra showed the strongest antibacterial properties and improved shrimp health, leading to increased growth and higher survival rates in shrimp fed diets containing the extract.
  • Results indicated that the extracts enhanced shrimp immune responses and reduced bacterial loads, suggesting A. glabra could be a viable health booster for farmed shrimp.
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Four undescribed spirostan glycosides, (25S)-5α-spirostan- 12-one-2α,3β-diol-3-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (1), (25S)-5α-spirostan-12-one-2α,3β-diol-3-O-β-D-galatopyranosyl-(1→2)-β-D-glucopyranosyl- (1→4)-β-D-galactopyranoside (2), (25S)-5α-spirostan-12-one-2α,3β-diol-3-O-β-D-glucopyranosyl-(1→2)-[β-D-glucopyranosyl-(1→3)]-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (3), and hecogenin 3-O-β-D-glucopyranosyl-(1→3)-[β-D-xylopyranosyl-(1→2)]-β-D-glucopyranosyl-(1→4)-[α-L-rhamnopyranosyl-(1→2)]-β-D-galactopyranoside (4), together with eleven known compounds (5-15) were isolated from the branches and leaves of Tribulus terrestris. Their chemical structures were established through spectroscopic methods, including HR-ESI-MS, 1D-, and 2D-NMR spectra. Preliminary biological evaluation on NO production inhibitory activity in LPS activated RAW 264.

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Oral preexposure prophylaxis uptake, adherence, and persistence during periconception periods among women in South Africa.

AIDS

July 2024

Maternal Adolescent and Child Health Research Unit (MRU), Department of Obstetrics and Gynaecology, University of the Witwatersrand, Faculty of Health Sciences, Durban, South Africa.

Article Synopsis
  • The Healthy Families-PrEP intervention was designed to promote HIV prevention during the period around conception and pregnancy among women in KwaZulu-Natal, South Africa, enrolling HIV-uninfected women in relationships with partners of unknown HIV status.
  • Out of 330 enrolled women, 60% initiated PrEP, with adherence rates varying over time; factors like lower income, alcohol use, and higher HIV stigma negatively impacted adherence.
  • Despite some success in PrEP uptake, there were 11 instances of HIV-seroconversions in participants, none of whom had detectable levels of the drug, highlighting the need for improved strategies to reduce HIV risk in this demographic.
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Background: In recent decades, a high prevalence of mental health problems among adolescents has been reported worldwide. In Vietnam, mental health problems such as emotional and behavioural difficulties are relatively common in the adolescent age group.

Objective: This study aimed to estimate the prevalence of emotional-behavioural problems and prosocial behaviours in Vietnamese adolescents and identify the role of social support in these adolescents' strengths and difficulties.

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Graphene quantum dots have been widely studied owing to their unique optical, electrical, and optoelectrical properties for various applications in solar devices. Here, we investigate the optoelectronic properties of hexagonal and nitrogen-doped graphene quantum dots using the first-principles method. We find that doping nitrogen atoms to hexagonal graphene quantum dots results in a significant red shift toward the visible light range as compared to that of the pristine graphene quantum dots, and the doped nitrogen atoms also induce a clear signature of anisotropy of the frontier orbitals induced by the electron correlation between the doped nitrogen atoms and their adjacent carbon atoms.

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Factors affecting highly pathogenic avian influenza vaccination practices at poultry farms in Tra Vinh, Vietnam.

Open Vet J

March 2024

Department of Animal Science and Veterinary Medicine, School of Agriculture and Aquaculture, Tra Vinh University, Tra Vinh, Vietnam.

Background: The increased number of cases of highly pathogenic avian influenza (HPAI) as a zoonosis has raised concerns in terms of poultry and human health. Farmers' preventive practices are an effective way of reducing zoonosis. However, this practice may have been affected by many factors, including production behaviors, awareness, and farmers' perceptions of farmers toward zoonosis.

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This study attempted to improve the photocatalytic activity of zinc oxide (ZnO) semiconductors in the visible light region by introducing the co-doping of carbon (C) and tantalum (Ta) to ZnO (ZTC) using a simple hydrothermal method with the respective precursors. The obtained uniform ZTC nanoparticles with an average crystal size of 29.30 nm (according to Scherrer's equation) revealed a redshift with a decrease in bandgap () from 3.

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Classification and application of metal-based nanoantioxidants in medicine and healthcare.

Beilstein J Nanotechnol

April 2024

BioNano Applications Research Center, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si 13120, Republic of Korea.

Antioxidants play an important role in the prevention of oxidative stress and have been widely used in medicine and healthcare. However, natural antioxidants have several limitations such as low stability, difficult long-term storage, and high cost of large-scale production. Along with significant advances in nanotechnology, nanomaterials have emerged as a promising solution to improve the limitations of natural antioxidants because of their high stability, easy storage, time effectiveness, and low cost.

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Introduction: Co-infection with HIV and mpox is a significant issue for public health because of the potential combined impact on clinical outcomes. However, the existing literature lacks a comprehensive synthesis of the available evidence. The purpose of this meta-analysis is to provide insight into the impact of HIV and mpox co-infection on clinical outcomes.

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The adsorption and degradation capacities of dichlorodiphenyltrichloroethane (DDT) on a photocatalyst composed of TiO supported on the mesoporous material MCM-41 (TiO/MCM-41) were investigated using density functional theory and real-time density functional theory methods. The van der Waals interactions within the PBE functional were adjusted by using the Grimme approach. The adsorption of DDT was evaluated through analyses involving adsorption energy, Hirshfeld atomic charges, Wiberg bond orders, molecular electrostatic potential, noncovalent interaction analysis, and bond path analysis.

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Between 2010 and 2023, a longitudinal study was undertaken to uncover the diversity of the parasite fauna of marine fishes in the Cat Ba Archipelago, a world biosphere reserve, in Vietnam. A total of 1,042 specimens representing 80 different fish species were collected and examined. Of these, 68 fish species, represented by 994 specimens (95.

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Background: The present study aimed to evaluate the effectiveness of using platelet-rich fibrin (PRF) as the apical matrix for the placement of MTA in nonsurgical endodontic therapy for teeth with periapical lesions and open apices.

Methods: Twelve teeth from eleven patients with periapical periodontitis and open apices were enrolled in the study. Nonsurgical endodontic therapy was performed with the PRF used as an apical barrier and the MTA manipulated as an apical plug for further thermoplasticized gutta percha in the remaining part of the root canal.

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