BACKGROUND The present work was designed to detect heavy metal contents of Al, Zn, Fe, Mn, Ni, V, Co, Cr and Cu in sediments and shells of the Trachycardium lacunosum collected in polluted and unpolluted areas along the Persian Gulf. METHODS The samples were taken from surface sediments (0-10 cm) and shells of Trachycardium lacunosum in two separated areas (polluted and unpolluted) in norther...

SODs (superoxide:superoxide oxidoreductase, EC 1.15.1.1) catalyze the dismutation of superoxide to dioxygen and hydrogen peroxide to protect organisms from oxidative damage (Hassan, 1984). SODs are metalloproteins that are classified into three types (Mn-, Fe-, and Cu/Zn-SOD) depending on the metal found in the active site. In plants, the most prominent SODs are Cu/Zn isozymes. It has been show...

Low-valent (MeBDI)Al and (MeBDI)Ga highly Lewis acidic cations in [(tBuBDI)M+⋅C6H6][(B(C6F5)4−] (M=Mg or Zn, MeBDI=HC[C(Me)N-DIPP]2, tBuBDI=HC[C(tBu)N-DIPP]2, DIPP=2,6-diisopropylphenyl) react to heterobimetallic [(tBuBDI)Mg–Al(MeBDI)+], [(tBuBDI)Mg–Ga(MeBDI)+] [(tBuBDI)Zn–Ga(MeBDI)+]. These feature long Mg–Al (or Ga) bonds while the Zn–Ga bond is short. The [(tBuBDI)Zn–Al(MeBDI)+] cation was n...

Organic UV filters have been known to generate harmful by-products and undergo photoreactive degradation, which ultimately poses a great threat consumers using sunscreen products. Inorganic such as TiO2 ZnO, although considered safer options, are not without considering their photocatalytic nature ability reactive oxygen species. A study was conducted identify the influence of different metal i...

27 Here we explore enrichments in paleomarine Zn as recorded by authigenic iron oxides 28 including Precambrian iron formations, ironstones and Phanerozoic hydrothermal 29 exhalites. This compilation of new and literature-based iron formation analyses track 30 dissolved Zn abundances and constrain the magnitude of the marine reservoir over 31 geological time. Overall, the iron formation record ...

The sorption behaviour of divalent cations M2+ (Cu, Pb and zn) and trivalent cations M3+ (Fe, Al) with humic acid isolated from oxidized coal (Hazro,se Anatolia,Turkey) was followed in aqueous solution. Coal humic acid and metal ion interaction was investigated with special emphasis on the effects of pH, metal ion concentration and humic acid concentration. it has been found that the interactio...