This paper describes the development of a procedure for Pb(II) ions removal from various water samples after magnetic solid phase extraction (MNPs) by magnetite nanoparticles (Fe3O4 NPs) modified with sodium dodecyl sulfate (SDS) and pyrrolidine-1-dithiocarboxylic acid ammonium (PDTCAA). The synthesis of Fe3O4 NPs was certified by characterization techniques including field emission scanning el...

This paper describes the development of a procedure for Pb(II) ions removal from various water samples after magnetic solid phase extraction (MNPs) by magnetite nanoparticles (Fe3O4 NPs) modified with sodium dodecyl sulfate (SDS) and pyrrolidine-1-dithiocarboxylic acid ammonium (PDTCAA). The synthesis of Fe3O4 NPs was certified by characterization techniques including field emission scanning el...

this paper describes the development of a procedure for pb(ii) ions removal from various water samples after magnetic solid phase extraction (mnps) by magnetite nanoparticles (fe3o4 nps) modified with sodium dodecyl sulfate (sds) and pyrrolidine-1-dithiocarboxylic acid ammonium (pdtcaa). the synthesis of fe3o4 nps was certified by characterization techniques including field emission scanning el...

The question of the(N, S) vs. (S, S) coordination mode on M x (ACDA)(2) complexes (ACDA=2-aminocyclopentene-1-dithiocarboxylic acid, M=Ni(2+), Pd(2+), Pt(2+)) was assessed through an extensive ab initio study, using the hybrid B3LYP density functional approach. The (S,S)coordination was found to be the most stable one, with an energy difference of ca. 50 kJ mol(-1) relative to the(N, S) coordin...

Cernik, A. A. (1970). Brit. J. industr. Med., 27, 40-42. Determination of lead chelated with ethylenediaminetetra-acetic acid in blood after precipitation of protein with perchloric acid. A method is described for the determination of lead in whole blood containing ethylenediaminetetra-acetic acid. Proteins were precipitated by 2-0 M perchloric acid. The ionized lead in the supernatant was chel...

Lead in blood was determined by atomic absorption spectrophotometry, using a wet ashing procedure and a procedure in which the proteins were precipitated with trichloroacetic acid. In both methods the lead was extracted into isobutylmethylketone before measurement, using ammonium pyrrolidine dithiocarbamate as chelator. The simpler precipitation procedure was shown to give results identical wit...

This paper describes the effect of NF-κB and Nrf2 transcription factor modulators on depolymerization periodontal extracellular matrix biopolymers in early post-traumatic period following modeling an experimental traumatic brain injury (TBI). The study was conducted 30 white Wistar male rats weighing 180-220 g, divided into 6 groups: 1st (pseudo-traumatized animals, control 1) scalp pinched wit...

A strain of Pseudomonas Jluorescens (ATCC 13430) was isolated which could utilize either pyrrolidine or putrescine as the sole source of carbon, nitrogen, and energy for growth. An investigation of the metabolism of pyrrolidine by this organism (1) suggested Al-pyrroline (I) as the first product of pyrrolidine catabolism followed by y-aminobutyric acid (III). Enzymes which were induced by growt...