We performed in-situ XAS study of N2O decomposition over CuO/CeO2 catalysts. The Cu K-edge and Ce L3-edge XANES EXAFS analyses revealed the dynamic crucial role Cu2+/Cu+ Ce4+/Ce3+ ionic pairs during catalytic reaction. observed initial formation reduced Cu+ Ce3+ species activation in helium atmosphere at 400 °C, while concentration these decreased significantly steady-state nitrous oxide degrad...

Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 932 Goals and objectives 933 Participants 933 Evidence, methodology and validation 933 Concept of a "live", modular document 933 Organisation of the document 933 De® nition of COPD . . . . . . . . . . . . . . . . . . . . . . . 933 Diagnosis of COPD . . . . . . . . . . . . . . . . . . . . . . . 933 Epidemio ogy, risk factors an...

The Kalmakyr deposit in Uzbekistan is one of the world’s largest gold-rich porphyry Cu deposits, and mineralization was proposed to be closely associated with emplacement latest intrusive phases, that is, granodiorite porphyry. However, it still unclear which features these ore-bearing intrusions are crucial for enormous metal enrichment how they correlate magmatic fertility. In this study, we ...

The thermal process of green amaranth leads to the partial or complete degradation chlorophyll pigments and loss colour due formation derivatives. This study aimed evaluate a stabilisation utilising metal ions obtain stable metal-chlorophyll derivative complexes. In this study, effects CuSO4 (0–240 ppm), ZnCl2 (0–1800 ppm) ions, pH (4–9), temperature (60–100 °C) on purees with constant time 15 ...

In the present study, the authors determined concentrations of several elements (As, Cd, Co, Cu, Cr, Mn, Pb, Sb, Zn) in the brains and livers of 46 bald eagles (Haliaeetus leucocephalus) from two Great Lakes states, Michigan and Minnesota. To explore whether exposures are of neurological concern, the authors assessed their associations with neurochemical receptors (N-methyl-D-aspartate [NMDA] a...

Excess of copper (>2 mg/L) in drinking water is significantly toxic to human being and ecological environments. Various treatment technologies for copper removal from industrial and municipal waste water effluents has been investigated in past. In the present study batch biosorption studies were carried out for the adsorption of Cu by using natural cheap agrowaste such as peel of Citrus sinensi...

Gold and copper ions react with syn-phenyl-2-pyridylketoxime (PPKO) at 40 degrees C to form neutral chelates. Metal-PPKO chelates subsequently become preconcentrated on a minicolumn packed with a divinylbenzene-methacrylate copolymer. By switching the valve, these chelates are separated on the silica-based phenyl column and detected with a photometric detector. These processes occur automatical...

Eleven types of nuts and seeds were analyzed to determine their energy (326-733 mg), moisture (1.6-18.3 mg), carbohydrate (8.8-70.9 mg), protein (4.9-30.5 mg), lipid (2.5-69.8 mg), and ash (1.2-5.5 mg) contents per 100 g of sample. Energy content was highest in pine nuts (733 mg/100 g), carbohydrate level was highest in dried figs (70.9 mg/100 g) and protein was highest in peanuts (30.5 mg/100 ...

Indium (In) is commonly hosted in Sn-rich deposits but rarely reported in Sn-poor deposits. However, an In-rich and Sn-poor skarn deposit, the Qibaoshan Cu-Zn-Pb deposit, has been identified in south China. Geochemical analyses were undertaken on 23 samples representing the following mineral assemblages: sphalerite-pyrite, pyrite-chalcopyrite, pyrite-sphalerite-galena-chalcopyrite, pyrite, magn...