abstract the aim of this study is laboratory investigation of nitrate reduction in water using fe/cu nano particles. in this regards, nano fe0 (54±4 nm) and fe/cu particles (75±3 nm) was synthesized and characterized by x-ray diffraction pattern (xrd), scanning electron microscope (sem) and transmission electron microscopy (tem) photographs. the effects of coating load of nano-fe0 by cu (0, 5, ...

In this study, the thermal performance of an internal heat exchanger-organic flash cycle system driven by geothermal water was investigated. The R600a/R601a mixtures were selected as working fluid. effects mole fraction on absorption capacity heater, temperature rise cold fluid in exchanger, net power output, efficiency, and electricity generation costs analyzed. outputs, costs, efficiency simp...

Introduction The corticospinal tract (CST) can be identified on heavily T2-weighted MR images as areas of bright intensity within the posterior internal capsules [1]. The CST is known to have thicker myelin sheaths than other brain structures [1,2] and this difference in myelin morphology may give rise to a difference in the water T2 behaviour in the CST. The T2 decay curve from central nervous...

The effects of sucrose on the physical properties of cassava starch aqueous systems were investigated at varied concentrations of cassava starch (5-15% w/w) and sucrose (0-40% w/w). The peak viscosity and the final viscosity during a gelatinization-retrogradation cycle were determined based on a Rapid Visco Analyzer (RVA) test. Sucrose generally increased the viscosity values, while such increm...

The low-frequency Raman spectra of dioxane aqueous solutions have been analyzed from a dynamical aspect of water structure. The reduced Raman spectra x9( n̄) of the dioxane aqueous solutions are well explained by a superposition of three characteristic modes of water and one Gaussian mode ~;60 cm! of dioxane. The concentration dependence of x9( n̄) spectra shows that the 190 cm mode of water disa...

The ground state energy of ideal α-matter at T = 0 is analyzed within the framework of variational theory of Bose quantum liquids. Calculations are done for three local α−α potentials with positive volume integrals and twobody correlation functions obtained from the Pandharipande-Bethe equation. The energy per particle of α matter is evaluated in the cluster expansion formalism up to four-body ...

M. Jodkowski, J. Łabaj, J. Brzóska, D. Jama – Silesian University of Technology, Katowice, Poland The research results on a method of reducing the amount of binder applied during formation of metal concentrates are presented. Research was done on a model copper concentrate, which was mixed in assumed mass fraction with binder, as well as binder with addition of waste polyols. Such mixtures were...

In this paper we give formulas for performing row reduction of a matrix of Ore polynomials in a fraction-free way. The reductions can be used for finding the rank and left nullspace of such matrices. When specialized to matrices of skew polynomials our reduction can be used for computing a weak Popov form of such matrices and for computing a GCRD and an LCLM of skew polynomials or matrices of s...

349 Maasai children younger than 6 years old were randomised by alternate household to drink water either left in plastic bottles exposed to sunlight on the roof of the house or kept indoors (control). The trial was run in Maasai by Maasai community elders. Children drinking solar disinfected water had a significantly lower risk of severe diarrhoeal disease over 8705 two weekly follow up visits...

High water absorption of recycled brick aggregate (RBA) is one of the most discussed parameters in terms of its application in the production of concrete-its influence on the amount of mixing water and, hence, the quality of the concrete, is usually considered negative. In this paper, different methods of decreasing the absorption of RBA and, consequently, the impact on the properties of concre...