Search results for " natural organic matter"

showing 3 items of 3 documents

Environmental Organic Photochemistry: Advances and Perspectives

2013

This review is a survey of recent advances in environment related aspects of organic photochemistry. Besides presenting gen- eral concepts, the manuscript is mainly focused on the photoreactivity of natural organic matter, and on the photochemistry of anthropo- genic substances under natural light irradiation.

photo- oxidationorganic photochemistryChemistryOrganic ChemistryMechanistic organic photochemistryLight irradiationSettore CHIM/06 - Chimica OrganicaEnvironmental photochemistry organic photochemistry natural organic matter photocatalysis photodegradation photo- oxidation.Natural organic matterSettore CHIM/12 - Chimica Dell'Ambiente E Dei Beni Culturaliphoto- oxidation.Organic chemistryEnvironmental photochemistrySettore CHIM/01 - Chimica Analiticanatural organic matterphotodegradationphotocatalysis
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Effect of RF Field Inhomogeneity and Sample Restriction on Spectral Resolution of CP/MAS-13C NMR Spectra of Natural Organic Matter

2010

It is well known that the induced B1 magnetic field in an NMR coil is inhomogeneously distributed. However, this issue has so far received little attention in the field of environmental NMR. As this research field often aims at quanti- tative results as well as relaxation phenomena, the repercussions of such inhomogeneity on peak integrals and relaxation times need to be taken into account. The objective of the present study was to test standard recording conditions on different sample positions in an NMR coil in order to determine the effect of the RF field inhomogeneity on the spectrum of a molecularly complex humic material and on some standard molecules of known structure and conformati…

Field (physics)Electromagnetic coilChemistryCP/MAS 13C-NMR RF field inhomogeneity physical sample restriction natural organic matter signal response profileSettore AGR/13 - Chimica AgrariaRelaxation (NMR)Resolution (electron density)Analytical chemistryMoleculeCarbon-13 NMRMolecular physicsSpectral lineMagnetic fieldThe Open Magnetic Resonance Journal
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Low field NMR spectroscopy for quality evaluation of natural organic matter

2009

NMR relaxometry natural organic matter
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