Severity: Warning
Message: fopen(/var/lib/php/sessions/ci_session9emi5ro4plqj0hgf4254pbaeoaqc52p0): Failed to open stream: No space left on device
Filename: drivers/Session_files_driver.php
Line Number: 177
Backtrace:
File: /var/www/html/index.php
Line: 316
Function: require_once
Severity: Warning
Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)
Filename: Session/Session.php
Line Number: 137
Backtrace:
File: /var/www/html/index.php
Line: 316
Function: require_once
453 results match your criteria: "VNU University of Science[Affiliation]"
Sensors (Basel)
November 2024
Air Defense-Air Force Technical Institute, 166 Hoang Van Thai, Ha Noi 11400, Vietnam.
The problem of calibrating phased array antennas in a noisy environment using an autocorrelation algorithm is investigated and a mathematical model of the autocorrelation calibration method is presented. The proposed calibration system is based on far-field scanning of the phased array antenna in an environment with internal noise and external interference. The proposed method is applied to a phased array antenna and compared with traditional rotating-element electric-field vector methods, which involve identifying the maximum and minimum vector-sum points (REVmax and REVmin, respectively).
View Article and Find Full Text PDFBiomed Phys Eng Express
December 2024
Electronics and Telecommunications, VNU University of Engineering and Technology, 144 Xuan Thuy, Cau Giay, Hanoi, 100000, VIET NAM.
This study proposed a microfluidic chip for the detection and quantification of NSE proteins, aimed at developing a rapid point-of-care testing system for early lung cancer diagnosis. The proposed chip structure integrated an electrochemical biosensor within a straight PDMS microchannel, enabling a significant reduction in sample volume. Additionally, a method was developed to deposit silver and silver chloride layers onto the reference electrode.
View Article and Find Full Text PDFJ Environ Sci Health B
December 2024
VNU Key Laboratory of Advanced Material for Green Growth, Faculty of Chemistry, VNU University of Science, Thanh Xuan, Hanoi, Vietnam.
Frequent use of pesticides results in the release of large quantities of their residues in the environment, raising various concerns for humans and the ecosystem. This work introduces a simple and cost-effective method for removal atrazine pesticide residue (APR) from agricultural wastewater using Cu doped-ZnO photocatalyst (Cu-ZnO). The modification of ZnO with Cu significantly improved its optical and photoelectrochemical properties, with the band gap narrowing from 3.
View Article and Find Full Text PDFThe genus Sycanus Amyot & Serville, 1843 includes seventy-two valid species distributed in African and Asian regions. Among those species, eight of them, Sycanus atrocoeruleus Signoret, 1862, S. bifidus (Fabricius, 1787), S.
View Article and Find Full Text PDFSci Rep
December 2024
Lab. for Organogenesis and Regeneration, GIGA-Institute, Université de Liège, Liège, 4000, Belgium.
Tartrazine (E102) is a controversial coloring agent whose potential impacts on human health are not fully understood. Our study reveals the vascular disrupting effects of tartrazine (TTZ) on developing zebrafish embryos in vivo and on human umbilical vein endothelial cells in vitro. The dye was shown to cause dose-dependent hemorrhages in zebrafish embryos.
View Article and Find Full Text PDFComput Biol Med
January 2025
Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam.
Mikrochim Acta
November 2024
Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, 100000, Vietnam.
A highly sensitive non-enzymatic absorption-based glucose sensor is introduced that combines ZnO nanorods with the ferrous oxidation-xylenol orange (FOX) assay. ZnO nanorods were successfully synthesized on the surface of a copper wire mesh, exhibiting high crystallinity, purity, and a large surface area. The glucose sensor displays a high sensitivity of 0.
View Article and Find Full Text PDFChemSusChem
November 2024
Queensland Micro and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia.
The development of efficient and sustainable chemical processes which use greener reagents and solvents, currently play an important role in current research. Methanol, a cheap and readily available resource from chemical industry, could be activated by transition metal catalysts. This review focuses in covering the recent five-years literature and provides a systematic summary of strategies for methanol activation and the use in organic chemistry.
View Article and Find Full Text PDFPLoS One
November 2024
Vinmec Hi-Tech Center, Vinmec Healthcare System, Hanoi, Vietnam.
Mesenchymal stem cell (MSC)-derived exosomes (EXs) have emerged as promising therapeutic agents for wound healing. However, the optimal conditions for manufacturing MSC-derived EXs that maximize their wound-healing potential have yet to be established. Hence, we compared the efficacy of five different MSC culture media, including three different serum-free, a platelet-supplemented, and a fetal bovine serum-supplemented media, in exosome manufacturing for wound healing applications.
View Article and Find Full Text PDFClin Exp Allergy
November 2024
GENTIS JSC, Hanoi, Vietnam.
Five potential allergens of freshwater crab (Somanniathelphusa sinensis), including hemocyanin, have been discovered. Specific IgE to haemocyanin was increased in crab-allergic than in crab-tolerant patients. The add-on of specific IgE to hemocyanin to skin prick test enhanced the specificity of the crab allergy diagnosis.
View Article and Find Full Text PDFJ Environ Sci Health B
December 2024
VNU Key Laboratory of Advanced Material for Green Growth, Faculty of Chemistry, VNU University of Science, Thanh Xuan, Hanoi, Vietnam.
This study explores the enhanced photocatalytic performance of ZnO nanorods (ZnO-R) for degrading the carbaryl pesticide (CB) in wastewater. For comparison, commercial ZnO (ZnO-C) was used to evaluate the differences in the photocatalytic decomposition of CB between ZnO-R and ZnO-C. The results regarding the material properties demonstrated that ZnO-R enhances CB removal performance due to its unique rod shape, which extends light absorption and improves electron-hole separation.
View Article and Find Full Text PDFChem Biodivers
November 2024
Institute of Marine Biochemistry, VAST, 18 Hoang Quoc Viet, Cau Giay, Hanoi, 10072, Vietnam.
Aglanoideas A-C (1-3), three undescribed sesquiterpenes and eleven known compounds (4-14) were isolated from the leaves of Aglaia elaeagnoidea. Their structures including absolute configurations were characterized by using IR, HR-ESI-MS, NMR, and experimental and calculating ECD methods. Compounds 3-5, and 7 showed moderate nitric oxide inhibitory activity with IC values ranging from 53.
View Article and Find Full Text PDFRSC Adv
October 2024
Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam
Braz J Biol
October 2024
Thu Dau Mot University, Department of Medicine and Pharmacy, Thu Dau Mot, Binh Duong, Vietnam.
This study aimed to investigate the impact of Vernonia amygdalina leaf extract on FLT3 regulation. V. amygdalina was extracted with 96% ethanol (VAE-96), and its cytotoxicity against FLT3- cell lines (MOLM-13 and MV-4-11) was evaluated.
View Article and Find Full Text PDFACS Biomater Sci Eng
November 2024
Department of Practical and Experimental Surgery, Vietnam Military Medical University, 160 Phung Hung Street, Phuc La, Ha Dong, Hanoi 10000, Vietnam.
Org Biomol Chem
November 2024
Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
The elemental sulfur and isothiocyanate (S/RNCS) couple was found to undergo redox condensation with -halonitrobenzenes in the presence of -methylpiperidine as a base in -methylpyrrolidin-2-one to provide step- and redox-economical access to 2-aminobenzothiazoles. Alternatively, dithiocarbamate salts generated from addition of amines and CS could be used in place of the S/RNCS couple.
View Article and Find Full Text PDFIUCrdata
September 2024
The title compound, [Zn(CHO)(CHN)]·3HO or {Zn[(CHN)NH][μ-(CH)(COO)]}·3HO, was separ-ated from the solvothermal reaction of zinc(II) sulfate hepta-hydrate, 2,2'-di-pyridyl-amine and sodium adipate. The dinuclear metal complex has a centrosymmetric structure, with the Zn atom adopting a highly distorted octa-hedral coordination sphere composed of four oxygen atoms from bridging adipato ligands and two pyridine nitro-gen atoms. In the crystal, the title compound aggregates into a tri-periodic supra-molecular structure through inter-molecular hydrogen-bonding networks of the form O-H⋯O and N-H⋯O.
View Article and Find Full Text PDFMicrob Biotechnol
September 2024
Research group for Physiology and Applications of Microorganisms (PHAM group), GREENLAB, Center for Life Science Research (CELIFE), Faculty of Biology, VNU University of Science - Vietnam National University, Hanoi, Vietnam.
DDT (dichlorodiphenyltrichloroethane) is a commonly used insecticide that is recalcitrant and highly stable in the environment. Currently, DDT residue contamination, especially in agricultural soil, is still a concern in many countries, threatening human health and the environment. Among the approaches to resolve such an issue, novel biodegradation-based methods are now preferred to physicochemical methods, due to the sustainability and the effectiveness of the former.
View Article and Find Full Text PDFACS Omega
September 2024
VNU University of Science, Vietnam National University, Hanoi 10000, Vietnam.
Dalton Trans
September 2024
Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam, 11021.
Two isoelectronic and isostructural W(0) and Re(I) complexes -W(CO)(PNP) (1) and [-Re(CO)(PNP)]Cl (2) (PNP = 4,5-bis(diphenylphosphino)acridine) were synthesized and characterized by X-ray diffraction, infrared, electronic absorption and emission spectroscopy, and cyclic voltammetry. Structures of these complexes show a metal center bonded to the pincer ligand and two axial CO and one equatorial CO ligands. DFT calculations showed that the LUMOs of both complexes are the lowest energy π* orbitals localized in the acridine part of the ligand.
View Article and Find Full Text PDFChem Biodivers
December 2024
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong, Hoankiem, Hanoi, 10000, Vietnam.
Pluchea indica (L.) Less. is a medicinal plant native to Asia.
View Article and Find Full Text PDFJ Pharm Biomed Anal
December 2024
Hanoi University of Pharmacy, Hanoi, Vietnam. Electronic address:
The detection of falsified drugs usually requires multi-disciplinary analysis for confirmative identification. Among hyphenated techniques with high specificity detection, thin-layer chromatography coupled with surface-enhanced Raman spectroscopy (TLC-SERS) is an efficient choice, especially for herbal products with diversified matrix. In this study, HPTLC was coupled to two detection techniques: UV absorption and Raman scattering with silver colloid enhancement for the analysis of sildenafil adulterated in herbal products.
View Article and Find Full Text PDFChem Biodivers
December 2024
Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam.
Phytochemical investigation of the methanol extract of the aerial parts of Lysimachia laxa led to the isolation of four new oleanane-type saponins, lysimosides A-D (1-4) and one known compound, lysimachigenoside B (5). Their structures were elucidated using a combination of HR-ESI-MS, 1D and 2D-NMR spectral data, chemical methods, and comparison with previous literature. The cytotoxic activity of these compounds was evaluated against human lung cancer (A-549) and human breast cancer (MCF-7) cell lines.
View Article and Find Full Text PDFSci Total Environ
November 2024
LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France.
Water resources play a crucial role in the global water cycle and are affected by human activities and climate change. However, the impacts of hydropower infrastructures on the surface water extent and volume cycle are not well known. We used a multi-satellite approach to quantify the surface water storage variations over the 2000-2020 period and relate these variations to climate-induced and anthropogenic factors over the whole basin.
View Article and Find Full Text PDFMolecules
July 2024
Leibniz Institute for Catalysis e.V. (LIKAT), Albert-Einstein-Street 29a, 18059 Rostock, Germany.
The development of highly efficient and stable visible-light-driven photocatalysts for the removal of herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) from water is still a challenge. In this work, BiMoO (BMO) materials with different morphology were successfully prepared via a simple hydrothermal method by altering the solvent. The morphology of the BMO material is mainly influenced by the solvent used in the synthesis (HO, ethanol, and ethylene glycol or their mixtures) and to a lesser extent by subsequent thermal annealing.
View Article and Find Full Text PDF