The interaction between hexavalent chromium Cr(VI), as K(2)CrO(4), and standard humic acids (HAs) in bulk solution was studied using three complementary analytical methods: UV-Visible spectroscopy, X-ray absorption spectroscopy and differential pulse stripping voltammetry. The observed UV-Vis and X-ray absorption spectra showed that, under our experimental conditions, HAs did not induce reducti...

This research examined a scenario for the recovery of high-capacity Cr(VI) adsorbent, consisting Sn6O4(OH)4, after reaching its operational lifetime. To accomplish this target, sequence processes involving spent adsorbent’s decomposition, separation Sn/Cr ions, and Sn6O4(OH)4 reconstruction was investigated. Characterization saturated adsorbent indicated extended oxidation to SnO2 during use ac...

The purpose of this study was to test the hypothesis that creatine (Cr) supplementation may promote an additional hypertrophic effect on skeletal muscle independent of a higher workload on Cr-supplemented trained muscle compared with Cr-nonsupplemented trained muscle. Male Wistar rats (2-3 months old, 250-300 g) were divided randomly into 4 groups (n = 8 per group): nontrained without Cr supple...

We exploit pilot-aided (PA) transmission enabled by single-sideband (SSB) subcarrier modulation of both quadrature signals in the DSP domain to achieve fully feedforward carrier recovery (FFCR) in single-carrier (SC) coherent systems with arbitrary M-QAM constellations. A thorough mathematical description of the proposed PA-FFCR is presented, its linewidth tolerance is assessed by simulations a...

Cardiac Rehabilitation Use AmongVeterans With Ischemic Heart Disease Referral to exercise-based cardiac rehabilitation (CR) is 1 of 9 performance measures for secondary prevention after hospitalization for myocardial infarction (MI), percutaneous coronary intervention (PCI), and/or coronary artery bypass graft (CABG).1,2 Although CR programs significantly reduce morbidity and mortality in patie...

The metal atom of the Cr(CO)(3) unit of the title compound, [Cr(C(17)H(14)O(4))(CO)(3)], is coordinated to the methoxy-phenyl ring of the isoflavone ligand; the Cr(CO)(3) unit exhibits a three-legged piano-stool conformation. The aromatic ring of the methoxy-phenyl group is twisted by 42.49 (9)° with respect to the γ-pyrone ring. In the fused-ring, the dihedral angle between the phenyl-ene and ...

The synthesis and characterization of the first Cr(V) complexes with non-sulfur-containing peptides, which may mimic the chemistry of the intermediates in the formation of Cr-induced peptide-DNA cross-links in vivo, are reported. The reduction of Cr(VI) with methanol in the presence of a number of non-sulfur-containing peptides produced relatively stable Cr(V)-peptide complexes, which were char...

The aim of the present study was to investigate the binding strength of chromium (Cr) ions to aquatic macrophyte Callitriche cophocarpa. Shoots of the plants were incubated in a natural water solution containing Cr(III) or Cr(VI) at a concentration ranging from 0.5 to 4 mM under laboratory conditions. We found that C. cophocarpa has an extremely high capacity to bind Cr. The average level of ac...

exact mechanism(s) underlying CR-induced cardioprotection remain(s) unknown. Recent evidence indicates that Sirtuins, NAD ؉-dependent deacetylases, regulate various favorable aspects of the CR response. Thus, we hypothesized that deacetylation of specific mitochondrial proteins during CR preserves mitochondrial function and attenuates production of reactive oxygen species during ischemia/reperf...