For an ordered set W = {w1, w2, · · · , wk} of vertices and a vertex v in a connected graph G, the representation of v with respect to W is the k-vector r(v|W ) = (d(v, w1), d(v, w2), · · · , d(v, wk)), where d(x, y) represents the distance between the vertices x and y. The set W is a connected resolving set for G if distinct vertices of G have distinct representations with respect to W and the...

Heteronuclear dual-site catalysts (HDACs), inspired from single-atom catalyst, have been proposed as advanced alternatives of noble metal especially toward nitrogen reduction reaction (NRR). However, the search for favorable candidates with both promising NH3 yield and Faradaic efficiency is still challenging, due to limited experimentally available bi-metal pairs lack thorough understanding de...

BACKGROUND The achievement of dialysis adequacy targets in peritoneal dialysis (PD) is assessed by the calculation of the Kt/V and creatinine clearance (C(Cr)) obtained by collecting dialysate and urine, usually two or three times a year. Prescription decisions are based on such adequacy assessments, regardless of any variability in the single measurements. The aim of our study was to assess th...

Results are presented from X-ray absorption spectroscopy based analysis of As, Cr, and V speciation within samples of bauxite ore processing residue (red mud) collected from the spill site at Ajka, Western Hungary. Cr K-edge XANES analysis found that Cr is present as Cr(3+) substituted into hematite, consistent with TEM analysis. V K-edge XANES spectra have E(1/2) position and pre-edge features...

The activation of the ethene tetramerisation catalyst system based upon [CrCl3(THF)3] and N( Pr)(PPh2)2 has been investigated in situ via the reaction of [CrCl3{PPh2N(R)PPh2}(THF)] 1a (R = Pr) with excess AlMe3 in toluene. The Cr K-edge XAFS spectrum of the solution freeze quenched after 1 min reaction time indicated monomethylation of the metal with the resultant product being [CrClMe(ClAlCl3)...

Micro-coiled fibers of carbon, Sic, Si N Tic, ZrC and Hf C were prepared by a metal-impurity activa?e%'chemical vapor deposition or vapour phase metallizing of the coiled carbon fibers. The growth conditions, morphology, growth mechanism and some properties were examined. The double-coiled carbon fibers were prepared using acetylene as a carbon source and various powders or plates of transition...

X $EVWUDFW In this study the partial oxidation of Q-butane to maleic anhydride (MA) in a solid electrolyte membrane reactor (SEMR) was investigated experimentally. The electrical conductivity of solid electrolyte membrane materials and vanadium phosphorus oxide (VPO) catalyst was investigated with 2-probe impedance spectroscopy. 13% yttria stabilized zirconia was selected as the solid electroly...