Motivated by the recent achievements in the manipulation of C(60) molecules in STM experiments, we study theoretically the structure and electronic properties of a C(60) molecule in an STM tunneljunction with a magnetic tip and magnetic adatom on a Cu(111) surface using first-principles calculations. For the case of a vanadium tip/adatom, we demonstrate how spin coupling between the magnetic V ...

The center pivot irrigation system is a type of technology used to apply water effectively and uniformly over wide variety areas topographies. These systems’ uniformity application greatly affects use, energy consumption, crop production. Performance tests the standard lateral galvanized modified polyethylene plastic pipes in systems were conducted different regions Saudi Arabia. Water distribu...

In order to investigate concentrations, variability, sources, and human health risk of trace elements, 38 atmospheric dust samples were collected around Arak industrial area. The average concentrations Cd~Zn, As, Pb 3.3, 2.5, 2.4 times higher than the corresponding geochemical background, respectively, while Co, Cu, Ni, Hg lower. Based on geo-accumulation index (Igeo), elements classified betwe...

Filtration is a simple ecological process for the treatment of effluents. This research examined physicochemical properties micronutrients, macronutrients, and heavy metals (HM) removed after slow filtration pig slurry (PS) through multiple media: sands, silt loam soils, fly ash, zeolite. The objective was to find new layer that can be added our constructed wetland (CW) improve its efficiency s...

Discrete homo Cu-Cu-Cu and hetero Cu-Pd-Cu or Cu-Co-Cu metal arrays are prepared within an organic-pillared coordination box by inserting M(ii)-azaporphine/porphine cartridges (M = Cu(ii), Pd(ii) or Co(ii)), where the metal arrays show unique spin interactions in ESR: in particular, Deltam(s) = 3 for the Cu-Cu-Cu array.

Abstract Corn was grown under greenhouse conditions in the presence of uncleaned versus cleaned municipal sewage sludge to assess effectiveness a chemical leaching process that uses an inorganic acid and strong oxidants clean biosolids (i.e., remove metals without reducing their agronomic potential). Specifically, our study analyzed physicochemical from Montreal (MSL) wastewater treatment plant...

Brainstem gliomas constitute 10% of brain tumors in children and less than 2% in adults. Since therapeutic options are limited and brainstem gliomas are associated with a high morbidity and mortality, we sought to analyze the prognostic factors associated with a better outcome. We reviewed the records of 86 patients with brainstem gliomas treated between 1996 and 2006. We recorded demographic a...

Leuthardt [1938a] and Bach [1939] have expressed the opinion that in addition to the ornithine cycle there are other mechanisms of urea synthesis in the mammalian liver. Leuthardt [1938a] found that liver of starved guinea-pigs forms urea more rapidly from glutamine than from NH4Cl. He concluded that NH3 cannot be an intermediate in the urea formation from glutamine and that there is a more or ...