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Spectroscopy
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Using column chromatography, thin layer chromatography, and extraction methods with n-hexane and ethyl acetate solvents, three pure compounds were isolated from the Sacandra glabra. The chemical structures of these three compounds were determined using nuclear magnetic resonance (NMR) spectroscopy.
6p
vialicene
19-07-2024
0
0
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Part 2 book "Nitrogen fixation - Methods and protocols" includes content: X-Ray crystallography; X-ray absorption spectroscopy, small angle X-ray scattering spectroscopy; electron paramagnetic resonance spectroscopy; magnetic circular dichroism spectroscopy; mössbauer spectroscopy; nitrogenase structure and function relationships by density functional theory; modeling the mofe nitrogenase system with broken symmetry density functional theory.
182p
dianmotminh04
12-07-2024
0
0
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Part 2 of ebook "CONCREEP 10: Mechanics and physics of creep, shrinkage, and durability of concrete and concrete structures" provides readers with contents including: steel corrosion in reinforced concrete mechanisms, assessment, measures, and forecast models; cracking behaviors caused by the corrosion of reinforcing bars in rc columns; evaluating the performance of recycled aggregate concrete; nanotechnology applied to concrete; towards the next generation of standards for the service life of cement-based materials and structures mini-symposium of COST action TU1404; microstructure and mic...
831p
mothoiphong
28-06-2024
1
1
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In this study, we attempted to non-invasively diagnose glioma development and the presence of IDH mutations using multivariate analysis of the plasma mid-infrared absorption spectra for a comprehensive and sensitive view of changes in blood components associated with the disease and genetic mutations.
14p
vikoch
27-06-2024
2
1
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In this work, the rGO/polyacrylic acid (rGO/PAA) composite film was synthesized using the 3D direct ink writing technique with GO/acrylic acid (GO/AA) ink and UV irradiation. Results show that after a UV irradiation time of 3.6 seconds, GO was reduced into rGO, and AA was polymerized into PAA.
8p
visergeyne
18-06-2024
2
0
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This paper reports the isolation of steroid and triterpene compounds from leaf chloroform extract residues and vine stems of S. juventas and the determination of their structure by nuclear magnetic resonance spectroscopy.
8p
visergeyne
18-06-2024
0
0
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The present study reports the synthesis, characterization, and application as energy devices of an ionic liquid blended polymer electrolyte film in which the host polymer polyvinyl alcohol (PVA) is mixed with low viscosity ionic liquid (IL) 1-ethyl-3-methylimidazolium thiocyanate.
7p
visergeyne
18-06-2024
0
0
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In this paper, polyvinyl butyral (PVB) composite coating was prepared with graphene oxide (GO) to improve mechanical properties, corrosion protection, and thermal oxidation stability. Fourier-transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Field Emission Scanning Electron Microscopy (FESEM),... were used to examine the results.
9p
viambani
18-06-2024
2
0
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In this study, the effect of nanoclay content on the fire resistance performances of intumescent coatings using ammonium polyphosphate (APP), pentaerythritol (PER), and melamine (MEL) is investigated. The epoxy and nanoclay-based intumescent coatings were developed to serve as coatings for steel substrates.
8p
viambani
18-06-2024
2
1
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This work aims to investigate the mechanism of Pd nucleation and growth onto glassy carbon electrode from ChCl/urea/palladium mixture at room temperature using cyclic voltammetry (CV) and chronoamperometry (CA) techniques. Furthermore, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy were used to examine the crystalline structure, morphology and compositions of deposited Pd samples.
14p
viambani
18-06-2024
4
1
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Surface-enhanced Raman spectroscopy (SERS) is a powerful technique for identifying molecular species, but it has been primarily limited to noble metal supports. This study clarified the SERS mechanism based on semiconductor material - ZnO microtube in probing methylene blue (MB) as an equal contribution of charge transfer and SPR mechanisms.
10p
viambani
18-06-2024
1
1
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In this study, Taguchi's experimental design method was used to improve the yield of FOX-7. Verification of the results shows that the optimal synthesis parameters are as follows: the molar ratio of HNO3/MPD is 8, the reaction time is 180 minutes, and the reaction temperature is 15°C; the maximum yield of FOX-7 can reach 79.14%.
8p
viambani
18-06-2024
1
1
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Bisulfate intercalated graphites with different particle sizes were prepared by a chemically oxidative method using natural flaky graphites as raw materials. The morphology and structure of the expandable graphites were confirmed by Fourier transform infrared spectroscopy, X-ray diffraction patterns, and scanning electron microscope.
14p
viamancio
04-06-2024
2
0
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In this study, we fabricated α-Fe2O3 materials via a facile hydrothermal route to use as the active material for the anode of an iron-based battery. The particle size of α-Fe2O3 was in a range of a few hundreds of nanometers to a few micrometers.
10p
viamancio
04-06-2024
3
0
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In this study, the B/ZnO materials were simply synthesized via a Sol-gel method. The photocatalytic ability of materials was evaluated by degrading tetracycline hydrochloride (TCH). The characteristics of the ZnO and 3B/ZnO materials were analyzed and evaluated by the Diffuse Reflectance UltravioletVisible (DR/UV-Vis), Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and X-Ray Diffraction (XRD) techniques.
8p
vijaychest
16-05-2024
1
0
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Part 2 book "Chromatographic methods" includes contents: High performance liquid chromatography, chromatography and spectroscopy techniques, processing chromatographic data, model or practical experiments in chromatographic techniques, illustrative problems in chromatography.
302p
dianmotminh01
14-05-2024
5
0
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A magnetic molecularly imprinted electrochemical sensor was developed for selective determination of sufentanil (SUF) based on carbon paste electrode (CPE) modified with methacrylic acid-ethylene glycol dimethacrylate-coated Fe3O4 nanoparticles (Fe3O4@MAA-EGDMA NPs). The structural properties, chemical structure, and electrochemical behaviors of the imprinted sensor were characterized by X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), and square wave voltammetry (SWV), respectively.
14p
dianmotminh02
03-05-2024
4
1
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A facial strategy for the synthesis of hierarchical binary core-branch carbon microspheres (CMS)@α-Fe2O3 is presented. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), and Brunauer–Emmett–Teller (BET) were used to characterize the structural and morphological properties of the products.
7p
dianmotminh02
03-05-2024
2
1
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This study presents the adsorption process of methylene blue and other organic pigments in water samples using synthetic materials derived from agricultural waste combined with Fe3O4. The properties of the materials were determined through Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and nitrogen adsorption-desorption isotherm.
10p
dianmotminh02
03-05-2024
3
1
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In this work, Al-doped ZnO and Fe-doped ZnO nanoparticles have been synthesized through the coprecipitationannealing method to create new and safer UV filters for sunscreen. The effects of metal doping on phase composition, crystal structure, surface morphology, specific surface area, and elemental composition were characterized by X-ray diffraction, Raman spectroscopy, field emission electron scanning microscopy, nitrogen adsorption-desorption experiments and energy-dispersive X-ray spectroscopy, respectively.
8p
dianmotminh02
03-05-2024
2
1
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