Zirconia (ZrO2) nanoparticles co-doped with Cu and Pt were applied as catalysts for carbon monoxide (CO) oxidation. These materials were prepared through solution combustion in order to obtain highly active and stable catalytic nanomaterials. This method allows Pt2+ and Cu2+ ions to dissolve into the ZrO2 lattice and thus creates oxygen vacancies due to lattice distortion and charge imbalance. ...

The final effluents of two wastewater treatment plants (WWTPs) in the Eastern Cape Province of South Africa were evaluated for their physicochemical and microbiological qualities over a period of 12 months. The physicochemical parameters assessed ranged as follows both plants. The ranges of values for the physicochemical are: pH (3.9-8.6), total dissolved solids (86.50-336.3 mg/L), electrical c...

Cellulose is a future major source of materials and biofuel but its extraction and its chemical or enzymatic treatments are difficult, polluting and inefficient tasks. The accessibility of the reagents to cellulose chains is indeed limited. Classical evocated reasons for this lack of accessibility are pore structure, tight hydrogen bond arrays, crystallinity and presence of resistant materials ...

In the possible scaling region for lattice chiral fermions advocated in Nucl. Phys. B486 (1997) 282, no hard spontaneous symmetry breaking occurs and doublers are gauge-invariantly decoupled via mixing with composite three-fermion-states. However the strong coupling expansion breaks down due to no “static limit” for the low-energy limit (p ∼ 0). We further analyze relevant Green functions of th...

Automatic identification of special effects is a prerequisite for video indexing and intelligent video encoding. In this paper we present an algorithm for fade and dissolve scene change detection in video sequences. We use statistical features of the images to identify these special effects in uncompressed video. DC-estimation [4] is used to evaluate statistical features both in H.263 [lo] and ...

Sulfur is a key element in terrestrial magmatic processes yet its geochemical behavior remains one of the most difficult to model due heterovalent chemistry. The maximum amount sulfur silicate melt can dissolve before saturating with sulfide (e.g., pyrrhotite) or sulfate anhydrite) changes redox state system and has important implications for budget system. Several empirical models have been de...

Essentiality of water sustain life, and a satisfactory supply must be readily available to promote health, prolong life expectancy prevent diseases. This study assesses the sources quality drinking in Piwoyi community Federal Capital Territory, Abuja, Nigeria. Thirty-five (35) Boreholes Two (2) Sachet were identified Community. Six Samples (5 1Sachet water) selected at random analyzed laborator...

Rare Earth (RE) phosphors waste contains valuable rare elements (REEs), such as cerium, terbium, yttrium, and europium. In industry, the process of NaOH roasting followed by acid leaching is usually used to extract REEs from in China. Using this process, efficiencies cerium terbium are clearly lower than those other REEs, which results uneven extraction low total REE efficiency. The key reason ...

We analyze the main motivations that lead to the present need for supporting continuous software evolution, and discuss some of the reasons for change requirements. Achieving software that is both dynamically evolvable and dependable is our long-term research goal. We do not attempt here to propose a unified solution to dissolve the apparent oximoron, i.e. to reconcile these apparently conflict...