743 results match your criteria: "Vietnam National University-Ho Chi Minh City[Affiliation]"

This study aimed to examine the key factors that influence entrepreneurial innovation and organizational performance, specifically focusing on the impact of environmental policy instruments, intellectual capital, and organizational learning. In the context of the resource-based view and institutional theory, the authors developed a comprehensive research model to establish hypotheses about the relationships between these factors. Utilizing a survey-based technique with random sampling, this study analyzes the complex relationships between variables by employing structural equation modeling.

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Cashew nut testa, a by-product of cashew nut processing, is abundant in phenolic compounds and exhibits strong antioxidant properties, making it a potential additive for enhancing the antioxidant properties of biodegradable films used in food packaging. This study explores the fabrication of biodegradable chitosan/polyvinyl alcohol films incorporating varying concentrations of cashew nut testa extract (CNTE; 0, 1, 2 and 3% v/v) and evaluates their physical, structural, mechanical, optical and antioxidant properties. The results demonstrate that increasing extract concentration generally increased the thickness, tensile strength, Young's modulus, thermal stability and antioxidant capacity of the films, while reducing the moisture content, swelling degree, elongation at break, and light transmittance.

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An efficient droplet-vitrification cryopreservation procedure for high imperatorin-yielding hairy root clones of Urena lobata.

Cryobiology

December 2024

Plant Biotechnology Laboratory, Department of Plant Biotechnology and Biotransformation, Faculty of Biology and Biotechnology, University of Science, Ho Chi Minh City, Viet Nam; Vietnam National University Ho Chi Minh City, Viet Nam. Electronic address:

Article Synopsis
  • Researchers found that imperatorin, a valuable anti-cancer and anti-inflammatory compound, can be extracted from the hairy roots of Urena lobata, but cryo-injury and cryoprotectant toxicity pose challenges for preserving root clones effectively.
  • They identified key factors that reduce plasmolysis during cryopreservation and improved a droplet-vitrification technique that included specific concentrations of sucrose and glycerol to enhance root survival rates.
  • The new cryopreservation method led to a 93.3% regeneration rate and comparable growth and imperatorin production to untreated roots after multiple subcultures, emphasizing the effectiveness of their plasmolysis evaluation approach for optimizing preservation techniques.
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HLA Compatibility and Graft Survival Rates Among Related and Unrelated Donors in Renal Transplantation.

Transplant Proc

December 2024

School of Biotechnology, International University, Vietnam National University Ho Chi Minh City, Vietnam; Research Center for Infectious Diseases, International University, Vietnam National University Ho Chi Minh City, Vietnam.

Human leukocyte antigen (HLA) compatibility between donors and recipients plays a critical role in graft survival in renal transplantation. This study evaluates the impact of HLA mismatching on graft survival and rejection among renal transplant recipients with related and unrelated donors, considering factors such as age, sex, ABO blood type, and anti-HLA antibodies. We investigated the graft survival rates between related and unrelated donors in a prospective cohort study conducted from 2018 to 2020 at Cho Ray Hospital and People's Hospital 115 in Vietnam, involving 126 related and 82 unrelated donor-recipient pairs.

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A simple grinding method using polyvinylpyrrolidone (PVP) as a capping agent is introduced to synthesize CoFeO nanoparticles. The effects of calcination temperature (ranging from 450 to 850 °C) on the structural, morphological, physical, and optical properties of the materials are investigated using various techniques, including thermogravimetric analysis/differential scanning calorimetry (TGA/DSC), powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), N adsorption isotherm, ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), and vibrating sample magnetometry (VSM). The presence of PVP significantly suppresses the agglomeration of the materials, resulting in a nanocrystalline size of 18 nm for a sample calcined at 650 °C, which is approximately 38% smaller than that of the sample synthesized without PVP.

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This study aimed to elucidate the risk of developing breast cancer (BC) by reproductive and hormonal profiles to suggest risk-adapted starting screening ages and to investigate risks after negative mammography results to inform screening intervals in the Korean setting. Participants who performed health examinations between 2002 and 2023 at the National Cancer Center were analyzed. Risk-adapted starting age of screening was defined as the age at which women with various reproductive and hormonal profiles obtained a 10-year cumulative risk level similar to women aged 40 years in the general population.

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Article Synopsis
  • * From hybrid maize fields with pH 5.50, researchers identified 61 K-PNSB isolates, which could dissolve between 56.2 and 98.6 mg/L of potassium, with three promising isolates (M-Sl-09, M-So-11, M-So-14) showing specific potassium dissolution ranges of 48.1-49.7 mg/L.
  • * Along with potassium solubilization, these three isolates also showed the ability to fix nitrogen, solubilize calcium-phosphate,
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Copper-Catalyzed Cascade Cyclization of 2-Nitrochalcones with NH-Heterocycles.

J Org Chem

December 2024

VNU-HCM Key Laboratory for Structures of Advanced Materials, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 84, Vietnam.

We developed a method for allowing cascade cyclization of 2-nitrochalcones with pyrazoles, imidazole, and indazole in the presence of CuI catalyst, DBU base, and THF solvent. The conditions were tolerant of an array of useful functionalities including ester, nitro, cyano, halogen groups. A mechanistic consideration was also provided, as HO was presumably a byproduct.

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The growing demand for electronic storage devices with faster charging rates, higher energy capacities, and longer cycle lives has led to significant advancements in supercapacitor technology. These devices typically utilize high-surface-area carbon-based materials as electrodes, which provide excellent power densities and cycling stability. However, challenges such as inadequate electrolyte interaction, hydrophobicity that impedes ion transport, and high manufacturing costs restrict their effectiveness.

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We developed a novel strategy for synthesizing a highly acidic microporous hybrid titanium phosphate material (H-TiPOx) by incorporating 5-aminosalicylic acid (5-ASA) into the titanium phosphate framework. This new H-TiPOx serves as a Brønsted acid catalyst, exhibiting remarkable total surface acidity of 5.9 mmol g and it efficiently catalyzes the acetalization of abundant biomass derived glycerol to solketal with over 99% selectivity.

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In this work, ZnO nanoparticles (NPs) are synthesized using avocado seed extract and annealed at different annealing temperatures from 400 to 800 °C. The morphology of the nanoparticles changes from poly shapes at 400 °C to spherical ones at 800 °C, and particle sizes increase from ∼42 nm to ∼128 nm. The Ag/ZnO@400/FTO memory device exhibits stable resistive switching over 100 cycles and a resistance window of approximately 150.

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Investigating Ni nanoparticles on CeO for methane dissociation: a comparative study of theoretical calculations and experimental insights.

Phys Chem Chem Phys

November 2024

Department of Mechanical Science and Engineering, School of Advanced Engineering, Kogakuin University, 2665-1, Hachioji, Tokyo 192-0015, Japan.

CeO supported with Ni nanoparticles has emerged as a promising catalyst for enhancing the efficiency of dry reforming of methane (DRM) reaction. Methane dissociation (CH → CH + H) was reported as one of the rate-determining steps in the DRM reaction. We elucidated the reaction mechanism and explored methods for reducing the activation energy using density functional theory (DFT) calculations, where the activation energy of methane dissociation was determined at multiple Ni cluster sites on CeO.

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Draft genome sequence of strain DS30.6, isolated from forest soil in Vietnam.

Microbiol Resour Announc

December 2024

Faculty of Biology and Biotechnology, University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh, Vietnam.

strain DS30.6 was chosen to be resistant to T2C-Rasto after being isolated from Vietnamese forest soil. The draft genome of this strain was reported to be 8,863,720 bp, with an average guanine-cytosine content of 72.

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The data in this work provides the effect of aging temperature on manganese oxide allotropes prepared by hydrothermal method in the presence of boron dopant. The synthesized samples were labeled as B/MnO -100, B/MnO -150, and B/MnO -180 corresponding to the hydrothermal temperature at 100, 150, and 180 °C, respectively. X-ray diffraction (XRD) and inductively coupled plasma mass spectrometry (ICP-MS) methods were conducted to clarify the crystalline structure, as well as the amount of potassium, manganese, and boron elements in the three synthesized samples.

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Despite extensive research in chemotherapy, global cancer concerns persist, exacerbated by the challenge of drug resistance, which imposes economic and medical burdens. Natural compounds, particularly secondary metabolites from medicinal plants, present promising avenues for overcoming cancer drug resistance due to their diverse structures and essential pharmacological effects. This review provides a comprehensive exploration of cancer cell resistance mechanisms and target actions for reversing resistance and highlights the and efficacy of noteworthy alkaloids, flavonoids, and other compounds, emphasizing their potential as therapeutic agents.

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Diet Changes and Colorectal Cancer Risk in the UK Biobank.

Cancer Epidemiol Biomarkers Prev

January 2025

Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.

Background: Modifying dietary behaviors into healthier habits may attenuate the risk of colorectal cancer. This study aimed to investigate the association between dietary changes and the risk of colorectal cancer.

Methods: Following dietary recommendations for red and processed meat, fruit and vegetables, and alcohol consumption, we classified 50,640 participants into poor and good adherence groups in the UK Biobank.

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Article Synopsis
  • The study investigates the health benefits of the Colla plant, particularly its effects on three enzymes: xanthine oxidase, lipase, and tyrosinase.
  • The seeds of the plant showed the strongest inhibition capacity for all three enzymes, while the fruit and corm also demonstrated notable performance in specific enzyme inhibition.
  • This research highlights the potential uses of various parts of the Colla plant in medical aesthetics, dietary supplements, and medicine, marking the first comprehensive report on its biological activities in Vietnam.
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Boron-doped scandium clusters B@Sc with = 2-13: uncovering the smallest endohedrally doped cages.

RSC Adv

October 2024

Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University Ho Chi Minh City Vietnam.

Article Synopsis
  • A study using density functional theory examines both pure scandium (Sc) and boron-doped Sc clusters, identifying B@Sc clusters as the smallest doped cages with an octahedral shape.
  • The research indicates a size-dependent transition in the clusters at a specific size (N=6), changing the placement of the B atom from outside to inside the Sc cage.
  • B doping improves the stability of Sc clusters, promotes high spin states, and reveals energy differences among stable spin states through molecular orbital analysis.
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Our study describes the reported rate of the Institutional Review Board (IRB) approval, declaration of Helsinki (DoH), and informed consent in the case reports and case series and investigates factors associated with the ethical approval report. We searched PubMed for case reports and case series from 2006 to 2017. Annually, we obtained the first 20 articles of a case report cluster from 20 distinct publications.

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Full-term pregnancy despite severe hypophosphatemia caused by tumor-induced osteomalacia.

Oxf Med Case Reports

October 2024

Department of Physiology, School of Medicine, Vietnam National University Ho Chi Minh city, YA1 Administrative Building, Hai Thuong Lan Ong Street, Dong Hoa Ward, Di An City, Binh Duong Province 75308, Vietnam.

A woman in her 30s with a history of multiple bone fractures unexpectedly became pregnant and delivered a full-term baby through cesarean section, despite suffering from excruciating pain without any apparent cause or specific treatment. The patient was referred to our endocrine clinic following childbirth. Blood tests revealed a life-threatening low level of serum phosphate, normal 25-hydroxy vitamin D concentration, low TmP/GFR ratio, and elevated FGF23 levels.

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Modified hydrothermal method for synthesizing titanium dioxide-decorated multiwalled carbon nanotube nanocomposites for the solar-driven photocatalytic degradation of dyes.

RSC Adv

October 2024

Faculty of Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City 227 Nguyen Van Cu Street, Ward 4, District 5 Ho Chi Minh City 70000 Vietnam

This study aimed to address the issue of rapid electron-hole recombination in photocatalysis by exploiting multi-phase TiO decorated on multiwalled carbon nanotubes (MWCNTs) to improve the photocatalytic degradation of dyes. A simple and eco-friendly one-pot method was utilized to create the TiO/MWCNT nanostructure using glucose as both a structure-directing agent and a carbon source without requiring any prior covalent or non-covalent functionalization of the MWCNTs at 160 °C. Furthermore, it was found that the average width of the nanocomposites changed from 20 ± 1 and 42 ± 2 nm to 56 ± 3 nm, corresponding to MWCNT contents of 1.

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Article Synopsis
  • - The study investigates NaMgCl as a potential solid-state electrolyte for Na-batteries, finding it has an energy gap of about 5 eV due to the unique arrangement of its ionic units.
  • - NaMgCl demonstrates mechanical stability and ductility, making it feasible for manufacturing, which can enhance electrolyte/electrode contact and boost battery performance.
  • - Its electrochemical properties include an open cell voltage of 1.2 V, a theoretical capacity of 133 mA h g, and excellent conductivity at room temperature (1.26 mS cm), comparable to existing superionic conductors.
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To meet various industrial requirements such as ease of motion, scalability, and cost efficiency, it is necessary to innovate the design of robotic platforms. In this research, a novel approach, from mechanical design to control implementation, is introduced for launching a robotic platform using a parallelogram mechanism. First, a reverse engineering process is applied, progressing from kinematics to dynamics.

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Article Synopsis
  • This study focuses on the prevalence and genetic diversity of certain protozoan parasites found in pigs and wild boars in Vietnam, highlighting their potential zoonotic threat to humans.
  • A total of 113 stool samples were analyzed, revealing a high prevalence rate of two main types of parasites, with wild boars showing a significantly higher infection rate than domestic pigs.
  • The findings underscore the risk of these parasites being transmitted to humans and emphasize the need for further research on their impact on public health.
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Unveiling the potential of medicinal herbs as the source for screening toward the inhibition of Nrf2.

Heliyon

October 2024

Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, No.100, Shih-Chuan 1st Road, Sanmin District, Kaohsiung City, 80708, Taiwan.

Background: Drug resistance is one of the leading causes attributed to the failure of cancer treatment by chemotherapy. Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor regulating gene expression in cell defense against oxidative stress or hazardous factors. Taking advantage of this feature, Nrf2 also serves as the bodyguard for both normal and cancer cells.

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