Electron spin resonance (ESR) studies on spin trapping of superoxide and hydroxyl radicals by 5,5-dimethyl-1-pyrroline-1-oxide (DMPO) were performed in NADPH-cytochrome P-450 reductase-paraquat systems at pH 7.4. Spin adduct concentrations were determined by comparing ESR spectra of the adducts with the ESR spectrum of a stable radical solution. Kinetic analysis in the presence of 100 microM de...

Objective: This study aimed to compare the effect of sodium hypochlorite (NaOCl), chlorhexidine (CHX), ethylene daimine tetra acetic acid (EDTA) and etidronic (HEBP) solutions their combinations on a push-out bond strength fiber posts root canal dentin microhardness. Material Methods: Sixty human maxillary central incisors were sectioned below cementoenamel junction, roots endodontically treate...

Purpose: To investigate the frequency of MBLs in Pseudomonas and Acinetobacter species with E-test, to determine risk factors evaluate demographic clinical features infected patients. Materials methods: Imipenem or meropenem resistance isolated from several samples conventional methods were evaluated imipenem EDTA E-test presence Metallo-β-lactameses MBL was examined. Several isolates screened ...

Through the esterification of cellulose (Cell) with ethylenediaminetetraacetic dianhydride, acid-functionalized (Cell-EDTA) was conveniently obtained. Furtherly a novel and efficient Cell-EDTA-supported palladium catalyst (Pd@Cell-EDTA) easily prepared via coordination Cell-EDTA PdCl2. The as-prepared Pd@Cell-EDTA fully characterized by inductively coupled plasma atomic emission spectrometry, X...

Objectives: The present study aims to evaluate the effects of different concentrations ethylenediamine tetraacetic acid (EDTA) on smear layer removal in primary teeth by using scanning electron microscopy (SEM). Materials and Methods: was performed with 28 extracted upper incisors assigned into four main groups (n=7) as 5%, 10% 17% EDTA, 1% sodium hypochlorite (NaOCl). root canal surfaces (coro...

Highly water-soluble lanthanum and cerium citrates or malates with ethylenediaminetetraacetate (NH(4))(8)[Ln(2)(Hcit)(2)(EDTA)(2)]·9H(2)O [Ln = La, 1; Ce, 2], K(8)[La(2)(Hcit)(2)(EDTA)(2)]·16H(2)O (3) and K(6)[Ln(2)(Hmal)(2)(EDTA)(2)]·14H(2)O [Ln = La, 4; Ce, 5] (H(4)cit = citric acid, H(3)mal = malic acid, and H(4)EDTA = ethylenediaminetetracetic acid) were prepared from the reactions of lanth...

Chromium is a heavy metal toxic for plants that due extensive industrial applications over the last decade, has become a serious environmental pollution. On the other hand, chelator dissolution and absorption of metal by the plant increase and their use in phytoremediation is important. The aim of this study was to evaluate the effect of different concentrations of chromium and ethylene diamine...