A previous investigation has shown that many terrestr ia l fungi do not produce ni trate reductase (Na-R) . Recen t l y , an examinat ion of marine fungi revealed that a l l strains tested produce N a R . Other authors, however, showed absence of this enzyme in a few marine strains. Our reinvestigation of an even broader spectrum of over 80 strains of marine fungi showed the presence of N a R w...

In this study, titanium nitride (TiN) is synthesized using reactive sputtering for a self-aligned gate process. The Schottky barrier height of the TiN on n-GaN is around 0.5 to 0.6 eV and remains virtually constant with varying nitrogen ratios. As compared with the conventional Ni electrode, the TiN electrode presents a lower turn-on voltage, while its reverse leakage current is comparable with...

In this paper, plate-like NiO nanoparticles were prepared by one-pot solid-state thermal decomposition of nickel (II) Schiff base complex as new precursor. First, the nickel (II) Schiff base precursor was prepared by solid-state grinding using nickel (II) nitrate hexahydrate, Ni(NO3)2∙6H2O, and the Schiff base ligand N,N′-bis-(salicylidene) benzene-1,4-diamine) for 30 min without using any solv...

This report describes the experimental and modeling work performed to evaluate porous cathodes for the electrochemical reduction of nitrates and nitrites in liquid wastes. The experiments were done using the MPt cell with two different porous cathodes: nickel foam and TySARm SBS. The experimental results are compared with each other and to those obtained with a planar nickel cathode. The result...

This paper aims at studying the impact of reaction that occurs between contaminants present in soil and silica fume added on chemical, physical mechanical properties soil. The samples were contaminated laboratory with nickel nitrate (Ni(NO3)2). Silica (SF) was to three different ratios (3%, 5%, 10%). Several experiments conducted study characteristics before after adding results revealed increm...

Zeolite 13X and 5A supported Ni catalysts were synthesized for CO2 methanation using the evaporation impregnation method. The influence of different precursors (nitrate, citrate, acetate) as well calcination temperatures on catalyst properties performance investigated. XRD, SEM-EDX, TEM, STEM-EDX, N2 physisorption, H2-TPR, TPD-NH3 TG/DTA used detailed characterization catalysts. parent structur...

The utilization of wastewater for useful fuel has been gathering recent attention due to society’s need for alternative energy sources. The electrooxidation of urea found at high concentrations in wastewater simultaneously accomplishes fuel production and remediation of harmful nitrogen compounds that currently make their way into the atmosphere and groundwater. Pure hydrogen was collected in t...

In this paper, polymer grafted nickel-doped iron oxide nanoparticles are fabricated via an easy, one-step and fast electrochemical procedure. In the deposition experiments, iron(II) chloride hexahydrate, iron(III) nitrate nonahydrate, nickel chloride hexahydrate, and dextran were used as the bath composition. Dextran grafted nickel-doped iron oxides (DEX/Ni-SPIOs) were synthesized with applying...