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Nuclear magnetic resonance spectroscopy
Published 2011“…Over the past fifty years nuclear magnetic resonance spectroscopy, commonly referred to as NMR, has become the preeminent technique for determining the structure of organic compounds. …”
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(1E)-1-(2-pyrazinyl)ethanone thiosemicarbazone (PT) as a tyrosinase inhibitor with anti-browning activity: Spectroscopy, DFT and molecular docking studies
Published 2023“…In this study, (1E)-1-(2-Pyrazinyl)ethanone thiosemicarbazone (PT) was synthesized and characterized using Fourier-transform infrared (FTIR), ultraviolet-visible (UV–Vis), proton nuclear magnetic resonance (1HNMR ) and carbon-13 nuclear magnetic resonance (13CNMR ) spectroscopy. …”
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The extraction of lignin from empty fruit bunch fiber via microwave-assisted acid hydrotrope solvent
Published 2021“…Characterization of lignin is done using Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and Nuclear magnetic resonance (NMR) while Scanning Electron Microscopy (SEM) and X-ray Powder Diffraction (XRD) used to characterize residues. …”
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Photo-Induced Characteristics of Azobenzene Based Gold Nanoparticles
Published 2017“…The structures of the compounds were elucidated by nuclear magnetic resonance, IR, transmission electron microscopy and UV-Vis spectroscopic techniques. …”
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Effect of Sawdust Species and Particle Size on Glucose Production
Published 2013“…From this research, it is recommended that Nuclear Magnetic Resonance Spectroscopy (NMR) and Thermal Gravimetric Analysis (TGA) can be used to determine the detail characteristics of cellulose and glucose that has been produced from sawdust.…”
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Undergraduates Project Papers -
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Experimental analysis on a novel low-temperature vacuum drying with induced nucleation technique for dewatering stingless bees honey
Published 2018“…The honey’s chemical compound before–after dewatering from one of the samples was tested using nuclear magnetic resonance (NMR) analysis. The dewatering rate improves significantly with higher temperature. …”
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Performance of Ce-incorporated KIT-6 supported cobalt catalysts for fischer-Tropsch synthesis
Published 2011“…The supports and catalysts were characterized by X-ray diffraction, diffuse reflectance UV-vis, solid-state 29Si magic-angle spinning nuclear magnetic resonance, H2-temperature programmed reduction, H2-temperature programmed desorption and oxygen titration. …”
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Hydrogen-rich syngas fermentation for bioethanol production using Sacharomyces cerevisiea
Published 2020“…The yield of bioethanol was identified by Gas chromatography-Mass spectrometry analysis and further, it was confirmed by Nuclear magnetic resonance (1H) analysis. From GC-MS results, it is revealed that the concentration of bioethanol using Saccharomyces cerevisiae was 30.56 mmol from 1 L of syngas. …”
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Bioassay-guided Isolation and Identification of Antifungal Compounds from Seeds of Swietenia Macrophylla King
Published 2016“…Solvent partitioning followed by Preparative High Performance Liquid Chromatography (prep-HPLC) of the most active fraction afforded four known limonoids and identified by spectroscopic techniques including Fourier Transform Infrared Spectroscopy (FTIR), Mass Spectrometry (MS) and Nuclear Magnetic Resonance Spectroscopy (NMR) analyses. The compounds were: swietenolide (1), proceranolide (2), 3-O-tigloyl-6-O-acetylswietenolide (3) and swietenine acetate (4). …”
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Chromatography strategies for the composition determination of bio-based sorbitol azelaic acid ester
Published 2018“…The presence of SL and its anhydrides in the sample was also affirmed using Nuclear Magnetic Resonance.…”
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Extraction of keratin from waste chicken feathers using sodium sulfide and L-cysteine
Published 2019“…The protein extracted from each feather section was characterised using sodium dodecyl sulfate-polyacrylamide gel electrophoresis, vibrational spectroscopy including FTIR and Raman, nuclear magnetic resonance, and thermogravimetry. These results confirmed the keratin structures after each extraction methods. …”
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Synthesis, structure determination and characterization of novel organometallic chromium hexacarbonyl derivatives via ligand (L) substitution /
Published 2012“…Infrared Spectroscopy ([R) and Nuclear Magnetic Resonance (NMIR) further compliment the X-ray diffraction results. …”
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Undergraduates Project Papers -
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Bioassay Guided Isolation and Identification of a Cytotoxic Compound from Azadirachta indica Leaves
Published 2015“…A compound, Quercetin 3-O-β-D-glucopyranoside, was isolated from the most toxic fraction of the ethyl acetate via preparative liquid chromatography and then identified via ultraviolet-visible (UV-Vis), infrared (IR), mass spectrum (MS) and nuclear magnetic resonance (NMR) analyses. The compound was further confirmed by physical state, color, solubility, and melting point determination. …”
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Chemical Compound Characterizations of Patchouli Leaf Extract via GC-MS, LC-QTOF-MS, FTIR, and 1H NMR
Published 2019“…Hence, this study focused on the characterization of extracted patchouli oil through microwave- assisted hydrodistillation (MAHD) technique using gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry quadrupole time of flight (LC-Q-TOF-MS), nuclear magnetic resonance (NMR), and Fourier transform infrared transmission (FTIR). …”
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Synthesis and characterization of thermo-responsive ionic liquids (TRILs)
Published 2020“…The TRILs were characterized using Fourier Transform Infrared (FTIR) to identify the functional group and Nuclear Magnetic Resonance (NMR) in confirming the structure. …”
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Conference or Workshop Item -
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Bioethanol production through syngas fermentation in a tar free bioreactor using Clostridium butyricum
Published 2020“…The obtained yield of bioethanol was analyzed by nuclear magnetic resonance and gas chromatography-mass spectrometry analyses. …”
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Quantitative analysis of molecular interactions in κ-carrageenan-Isovanillin biocomposite for biodegradable packaging and pharmaceutical applications using NMR, TOF-SIMS, and XPS a...
Published 2024“…This study explores the molecular interactions and structural changes in κ-carrageenan crosslinked with isovanillin to create a biocomposite material suitable for hard capsule and bio-degradable packaging applications. Proton Nuclear Magnetic Resonance (1H NMR) spectroscopy revealed chemical changes in the conjugate molecule, indicating improved electronegativity due to intermolecular hydrogen bonding between κ-carrageenan and isovanillin. …”
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The Effects of Increasing Unsaturation in Palm Oil and Incorporation of Carbon Nanotubes on Resinous Properties
Published 2015“…Structural elucidation was confirmed by Fourier transform of infrared spectroscopy and proton nuclear magnetic resonance; surfaces of the films were examined by field-emission scanning electron microscope. …”
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Characterization of Flavonoids from Fern Cheilanthes Tenuifolia and Evaluation of Antioxidant, Antimicrobial and Anticancer Activities
Published 2017“…Their structure and chemical bonds were identified by using Nuclear Magnetic Resonance (NMR) spectroscopy and Fourier Transform-Infra Red Spectroscopy (FTIR). …”
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A rapid quantitative dye-binding method of screening glycosaminoglycans presence in medicinal plants
Published 2019“…The selected plant sample was examined by microscopy and further analyzed by nuclear magnetic resonance (NMR) and Fourier-transform infrared (FTIR) spectroscopy. …”
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