Purpose. To develop a method of using salts humic acids obtained from brown coal Ukraine for sorption heavy metal ions and their extraction ultrafiltration membranes. Methodology. Unique laboratory equipment has been developed to determine the capacity substances with concentration 0 20 mg/l in relation (Cu2+, Pb2+, Cd2+, Hg2+, Zn2+, Co2+) 5 mg/l. The results proximate ultimate analyzes, as wel...

Lack of sewage collection systems, percolation of surface waters, and seepage of wells have raised the groundwater table in Shiraz area in the south of Iran. The growing population generates environmental pollution resulting in the degradation of the quality of surface and groundwaters used for agriculture. Inorganic and organic pollutants have been traced in Shiraz water resources. Heavy metal...

Monovalent and divalent cations competitively displace tetrodotoxin and saxitoxin (STX) from their binding sites on nerve and skeletal muscle Na channels. Recent studies of cloned cardiac (toxin-resistant) and brain (toxin-sensitive) Na channels suggest important structural differences in their toxin and divalent cation binding sites. We used a partially purified preparation of sheep cardiac Na...

In this work, innovative biosourced polyimide polymers were derived from novel combinations of monomers (Isosorbide, 6-FDA and amine cardo). These obtained with satisfactory yields by polycondensation different percentages isosorbide (from 100% to 0%). The synthesized polyimides had number average molecular weight in the 17,600–22,000 g/mol range, they stable well above 451 °C (5% loss N2). gla...

In this research, graphene oxide (GO) was functionalized by tannic acid to produce GO-TA and fabricate a novel functionalized graphene oxide/ polyacrylonitrile (PAN) nanofibrous as an adsorbent in order to remove two hazardous heavy metals from aqueous solutions. The results showed that the composite adsorbent can properly adsorb Pb2+ and Cd2+ metal cations, due to having the numerous potential...

The effects of the heavy-metal ions Cd2+ and Zn2+ on the homoeostasis of intracellular free Ca2+ in E367 neuroblastoma cells were examined using 19F-NMR spectroscopy with the fluorinated chelator probe 1,2-bis-(2-amino-5-fluorophenoxy)ethane-N,N,N', N'-tetra-acetic acid (5F-BAPTA). First, the technique was used to quantify the uptake and intracellular free concentrations of the heavy metals aft...

In this study, polymeric nanocomposites of zeolitic imidazolate frameworks (ZIFs) were synthesized by assembly a biomimetic polymer-polydopamine (PDA)onto halloysite nanotubes (HNTs@PDA), followed the in situ growth framework-8 (ZIF-8) on surface HNTs@PDA. The obtained (HNTs@PDA/ZIF-8) prevented agglomeration ZIFs and increased number active sites derived from PDA. factors influencing heavy met...

Drosophila mutants provide an ideal model to study channel-type specificity of ion channel regulation in situ. In this study, the effects of divalent cations on voltage-gated K+ currents were investigated in acutely dissociated central neurons of Drosophila third instar larvae using the whole-cell patch-clamp recording. Our data showed that micromolar Cd2+ enhanced the peak inactivating current...

The effects of divalent cations (Zn2+, Cd2+, Ca2+, Mg2+) on the cytosol androgen receptor were determined by sedimentation into sucrose gradients. At low ionic strength (25 mM KCl, 50 mM Tris, pH 7.4), Zn2+ (200 microM total, which calculates to 130 nM free Zn2+ in 10 mM mercaptoethanol) causes a shift in the sedimentation coefficient of the rat Dunning prostate tumor (R3327H) cytosol receptor ...