Teodoro Miano

TL;DR: In this paper, the chemical pathways of decomposition and humification of SOM in tropical soils are discussed referring mainly to the chemical structural changes identified by using both solid-state13C nuclear magnetic resonance spectroscopy (13C NMR) of bulk soil samples and liquid-state 13c NMR of chemically isolated SOM fractions.

TL;DR: Fifty samples of humic acids and fulvic acids isolated from various soils and soil-related materials (including paleosols, peat, leonardite, composted and earthworm-composted organic materials, sewage sludges, and materials synthesized by soil fungi) have been investigated by fluorescence spectrosc as mentioned in this paper.

TL;DR: In this article, eleven standard and reference fulvic acids (FA) and humic acids (HA) of aquatic and terrestrial origin from the collection of the International Humic Substances Society have been studied by chemical and spectroscopic methods.

TL;DR: This is the thickest accumulation of peat ever found in a free-floating mire, yet it has formed during the past seven centuries and represents the greatest accumulation rates, at both decadal and centennial timescale, of OM, organic matter, organic carbon and total nitrogen.

TL;DR: In this paper, nine fulvic (FA) and humic (HA) acids were isolated from different soils and investigated by means of synchronous-scan excitation fluorescence spectroscopy at various Δλ = λem − λexc, in aqueous solution over a wide range of concentration and pH values.