Results 21 to 30 of about 140,285 (306)
Synthesis and complete NMR spectral assignments of new benzylamino coumarin derivative [PDF]
Bulletin of Natural Sciences Research, 2020 This research involves the reaction of 4-chloro-3-nitrocoumarin and (4-methoxyphenyl)methanamine, whereby a novel coumarin derivative 4-[(4-methoxybenzyl) amino]-3-nitro-2H-chromen-2-one was obtained in good yield.
Dekić Vidoslav +4 more
doaj
Isolation of lupeol from the stem bark of Leptadenia hastata (Pers.) Decne
Journal of Applied Sciences and Environmental Management, 2020 Dried stem bark powder of Leptadania hastata was subjected to maceration with methanol to afford crude methanol extract, which was partitioned with n-hexane, ethylacetate, chloroform and n- butanol to afford different their respective fractions ...
M.M. Mailafiya +7 more
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Conversion of Lignocellulose Studied by Nuclear Magnetic Resonance
Chinese Journal of Magnetic Resonance, 2021 Nuclear magnetic resonance (NMR) is an important characterization method for the depolymerization of lignocellulosic biomass and its structure evolution analysis.
Xiao-li CHEN +5 more
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Pharmaceutical Biology, 2017 Context: Traditionally, Rhododendron arboreum Sm. (Ericaceae) is a very important medicinal plant having oxytocic, estrogenic, anti-inflammatory, analgesic and hepatoprotective activities; it also inhibits the prostaglandin synthetase.
Sajid Ali +4 more
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Ultrafast 2D NMR for the analysis of complex mixtures
Progress in Nuclear Magnetic Resonance Spectroscopy, 2022 2D NMR is extensively used in many different fields, and its potential for the study of complex biochemical or chemical mixtures has been widely demonstrated. 2D NMR gives the ability to resolve peaks that overlap in 1D spectra, while providing both structural and quantitative information.
Lhoste, Célia +8 more
openaire +3 more sources
Ultrafast 2D benchtop NMR spectroscopy enhanced by flow Overhauser dynamic nuclear polarization
Journal of Magnetic Resonance OpenBenchtop Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful analytical technique for the monitoring of reactions and processes due to its accessibility and lower cost compared to high-field NMR.
Joris Mandral +5 more
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Wine analysis by 1D and 2D NMR spectroscopy [PDF]
Analusis, 1998 We have measured 1D and 2D, H and C NMR spectra of selected Slovenian wines. Partial assigment of H and C resonances of alanine, valine, leucine, isoleucine, ethanol, glycerol, butylenglycol and acetic, tartaric, lactic and malic acids in the wine samples was carried out by combinationof homo and heteronuclear experiments COSY, HSQC and HMBC with know ...
Košir, Iztok +2 more
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Analysis of Honey Samples by 2D NMR Experiments
, 2022 NMR Analysis of dew and acacia honey by 1 and 2D HSQC, TOCSY, and HSQC-TOCSY techniques were used to evaluate COLMARm automatic metabolomic detection, the main fractions of honey, and for a view of the usage of NMR for fingerprint detection.Chemical ...
Pellegrini Silva, Raul
core
Effect of the Internal Magnetic Field Gradient on Two Dimensional NMR Responses in Volcanic Rock
Cejing jishuTwo dimensional (2D) nuclear magnetic resonance (NMR) technology can provide two kinds of relaxation information simultaneously, which has significant advantages in fluid identification and quantitative evaluation. There are rich paramagnetic minerals in
CUI Shitao +6 more
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Core testing technology with T2-Pc two-dimensional nuclear magnetic resonance and its application
Shiyou shiyan dizhi, 2021 As a non-destructive, efficient and non-invasive detection method, nuclear magnetic resonance (NMR) technology has always played an important role in the analysis of oil and gas cores, but the traditional nuclear magnetic resonance detection results (T2 ...
Yao CHEN +4 more
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