Metal dispersion is key for designing highly active and well-defined catalytic systems. Herein, to shed light on the effects of Nb conversion fructose into HMF, porous silica glasses grafted with niobium oxide were prepared. Preliminary screening was done microwave-assisted 5-hydroxymethylfurfural (HMF) in a biphasic system. The impregnated presented HMF productivities about 10- 20 times higher...

Humic isoJates from different layers of an organic-matter-rich algal sapropel from Mangrove Lake, Bennuda, were subjected to solid-state 15N nuclear magnetic resonance (NMR) spectroscopy in crder to reveal chemical structural interrelationships tbat allow delineation of diagenetic pathways. Amide-N, most likely from peptide-like material, \Vas found to represent the main organic nitrogen fonu i...

The nonequilibrium-phase distribution of the pesticide derivative 2,4-dichlorophenol (DCP) was studied in the context of two surface soils. DCP sorption was evaluated for five different initial aqueous concentrations of the solute -5, 10, 50, 100, and 500 μM. Solute-soil contact times were 0.02, 1, 7, 14, 28, 56, and 84 days. Uniformly ring-14C-labelled DCP was used to improve detection limits ...