The quantitative deconvolution of 1D-NMR spectra into individual resonances or peaks is a key step in many modern NMR workflows as it critically affects downstream analysis and interpretation. Depending on the complexity of the NMR spectrum, spectral deconvolution can be a notable challenge. Based on the recent deep neural network DEEP Picker and Voigt Fitter for 2D NMR spectral deconvolution, we present here an accurate, fully automated solution for 1D-NMR spectral analysis, including peak picking, fitting, and reconstruction. The method is demonstrated for complex 1D solution NMR spectra showing excellent performance also for spectral regions with multiple strong overlaps and a large dynamic range whose analysis is challenging for current computational methods. The new tool will help streamline 1D-NMR spectral analysis for a wide range of applications and expand their reach toward ever more complex molecular systems and their mixtures.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10539790 | PMC |
http://dx.doi.org/10.5194/mr-4-19-2023 | DOI Listing |
Heliyon
December 2024
Hygienic Safety and Materials Research Group, World Institute of Kimchi, 86 Kimchi-ro, Nam-gu, Gwangju, Republic of Korea.
In this study, we demonstrate the potential of a non-destructive hyperspectral imaging processing method in the near-infrared (NIR) region (874-1734 nm) for classifying the quality of brined kimchi cabbage. The salinity level of brined kimchi cabbage is an important indicator of consumer preference and the quality of kimchi. Hence, we compared the water content and salinity of brined kimchi cabbage via hyperspectral data.
View Article and Find Full Text PDFElectron paramagnetic resonance (EPR) spectroscopy has long been established across various scientific disciplines for characterizing organic radicals, organometallic complexes, protein structures and dynamics, polymerization processes, and radical degradation phenomena. Despite its extensive utility in these areas, EPR spectroscopy's application within pharmaceutical science has historically been constrained, primarily due to factors such as high equipment costs, a steep learning curve, complex spectral deconvolution and analysis, and a traditional lack of emphasis on single-electron chemistry in pharmaceutical research. This review aims to provide a thorough examination of EPR spectroscopy's applications in analyzing a wide array of para-magnetic species relevant to pharmaceutical research.
View Article and Find Full Text PDFJ Phys Chem B
December 2024
Physical Chemistry Division, Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden.
We discuss the prospects for accurate B magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectral deconvolutions for reaching beyond the readily extracted borate speciations offered by the integrated resonances of the coexisting B and B species of the respective BO and BO network groups in borosilicate (BS) glasses. We critically review hitherto proposed B and B NMR-peak assignments relating to their neighboring Si, B and B species, as quantified by MAS NMR spectral deconvolution. Guidance to these resonance assignments was offered from double-quantum-single-quantum (2Q-1Q) B MAS NMR experiments that inform about the B-O-B network linkages.
View Article and Find Full Text PDFChemosphere
December 2024
Department of Marine Science and Convergence Technology, College of Science and Convergence Technology, Hanyang University, Ansan, 15588, Republic of Korea. Electronic address:
According to global regulations on hazardous chemicals, numerous alternatives have been manufactured and used in various consumer products. Suspect and non-target analyses are advanced analytical techniques used for identifying novel contaminants. In the present study, suspect and non-target analytical approaches using a gas chromatography coupled to a time-of-flight mass spectrometer were applied to identify novel contaminants in 40 pooled serum samples from a sub-population (n = 400) of the 2015-2017 national biomonitoring program.
View Article and Find Full Text PDFMar Drugs
November 2024
Laboratory of Pharmacognosy & Natural Products Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, 15771 Athens, Greece.
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