A synthetic water-soluble meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrinate of iron(III) chloride, Fe(TDCPPS)Cl, was employed as a biomimetic catalyst in the oxidative coupling of terrestrial humic materials. High-performance size-exclusion chromatography (HPSEC), solid-state nuclear magnetic resonance (CPMAS-(13)C NMR), electron paramagnetic resonance (EPR), and diffuse reflectance infrar...

We observed significant changes in the dissolved oxygen content and the fluorescence of humic substances and dissolved aromatic amino acids after 24 h light and dark incubations in the coastal upwelling system of the Rı́a de Vigo under a wide variety of meteorologic and oceanographic conditions. Respiration rates were inversely correlated with the net production of humic fluorescence in the dark...

Humic substances (HS) are macromolecular organic materials ubiquitous in both aquatic and terrestrial systems, effective electron shuttling compounds providing macro- microelements organochelate form, play an important role determining the mobility bioavailability of organic/inorganic nutrients mineral fertilizers [...]

Increasing agricultural productivity and, in particular, the of livestock is one primary tasks present stage development society. This involves rational feeding and use biologically active substances, including humic preparations that activate digestive metabolic processes animal, promoting transformation feed nutrients assimilable form, raising daily milk production weight gain, can play an im...

INTRODUCTION A synthetic water-soluble meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrinate of iron(III) chloride, Fe-(TDCPPS)Cl, was employed to catalyze the oxidative co-polymerization of penta-halogenated phenols in two humic materials of different origin. MATERIALS AND METHODS Co-polymerization of pentachlorophenol (PCP) was followed by high-performance size-exclusion chromatography (HP...