Cullin 2 ELISA Kit

[CuLn](2+) and [LnH](+) (L=cytidine) with high relative intensity were observed in the gas phase via electron-spray of water and methanol solution of Cu(NO3)(2) and cytidine. The possible structures and zero-point energies for the most of these complexes were calculated with OFT methods. The results show that coordination is the main interaction between the L and Cu(II) for [CuLn](2+) (n = 1-4), and the hydrogen-bond between the Ls for [LnH](+) (n=1-4); the structures for [CuLn](2+) are that the Cu(II) coordinate mostly 4 ligands forming the primary order sphere and other ligands just bind loosely with the primary sphere forming the secondary or outer sphere, and [LnH](+) are that the protonated L dimer composes the primary sphere, and the others binding the dimer loosely form the outer sphere; the calculated stability orders are [CuL2](2+) > [Cul](2+) > [CuL4](2+) > [CuL3](2+) and [L2H](+) > [LH](+) > [L3H](+) > [L4H](+) which are luckily consistent quite well with the peak intensity distribution in the mass spectrum. (C) 2013 Elsevier B.V. All rights reserved.

CuO and Er-doped CuO nanostructures were synthesized by thermal decomposition of Cu-salophen complexes containing chlom, bmmo and nitro substituents as precursors (CuL1, CuL2 and CuL3, respectively). The structure of products was characterized by FT-IR spectroscopy and XRD patterns. XRD patterns indicated that the formation of single-phase monoclinic structures without impurity and also confirmed that erbium ions are successfully doped into CuO crystal lattice. The photocatalytic activity of all samples was measured against the Reactive Black 5 dye under UV radiation. The photocatalytic mineralization of RB-5 was monitored by total organic concentration (TOC) decrease and changes in the UV-Vis spectra. The results revealed that the photocatalytic efficiency of Er-doped CuO samples is much higher than their un-doped counterparts. The highest percentage of dye decomposition was achieved using Er-doped CuO (1). The optical band gaps calculated from UV-Vis spectra were found to be 3.60 eV for both CuO (1) and Er-doped CuO (1). The PL spectrum of Er-doped CuO (1) showed a significant decrease in emission intensity, which was related to the electron-hole separation due to electron transfer from CuO conductive band to Er(3+ )ions. The BET analysis revealed after Er3+ doping, the surface porosity and specific surface area increased because of the appearance of some surface defects in CuO structure. FE-SEM images of both pure and doped CuO samples displayed that the powders consist of highly agglomerated nano-flakes resulting from overlapping of small particles. Further analysis of Er-doped CuO (1) with TEM indicated the prepared sample is composed of nanoparticles.