from flora of north west of iran, four contrasting species in term of frequency and coverage on heavy metal rich soils were selected to study physiological mechanisms for different tolerance of zn and cu toxicity in a hydroponic culture experiment. for study of zn toxicity, dactylis glomerata and secale monatum and for cu, cichorium intybus and astragalus echinops were selected. a clear differe...

A 6-month experiment with nine dietary treatments was conducted to determine amounts of S plus Mo supplements required to maintain normal hepatic concentrations of Cu and Mo and to prevent chronic Cu toxicity in lambs fed palm kernel cake (PKC) diets. All diets consisted of PKC supplemented with minerals and vitamins, and with appropriate amounts per kg DM of S (level 0 or level 1 = 1 g) as sod...

A procedure was developed for extracting polysomes from tobacco (Nicotiana sp) leaves. Unexpanded leaves ground in a medium consisting of 200 mm tris-HCl, pH 9, 400 mm KCl, 200 mm sucrose, and 35 mm MgCl(2) yielded larger amounts of polysomes with less degradation than polysomes from leaves extracted with buffers of lower ionic strength or pH. Extraction of polysomes from expanded leaves requir...

Previously, we found that Epirrita autumnata larvae, which were fed with leaves that came from a metal polluted area, had an enhanced immune function. To investigate further the cause of the enhanced immunity we examined experimentally the direct influence of the heavy metals, copper and nickel, on the immune function of the geometrid moth we artificially added the metals to the surface of birc...

*上 田泰司 ,中 原元和,石 井紀明,鈴 木 譲:放 射線医学総合研究所 海洋 放射生 態学研究部,那 珂湊 市 磯崎3609〒311-12 **鈴 木浜治:動 力炉核燃料開発事業団 安全管理部 茨城県那珂郡東海村村松3371 〒319-11 Trace element/Cephalopods/Concentration factor For the estimation of internal radiation to human beings, the amounts of Mn, Fe, Cu, Zn, Co and Cs in 5 species of marine cephalopods were determined by atomic absorption spectro photometry and neutron activation analysis, and ...

Mesoporous MCM-41 molecular sieves substituted with various amounts of Cu(II) and Al(III) were synthesized by the hydrothermal method. The resultant materials were characterized by XRD, XANES, surface area and pore size measurement, EPR and 27Al solid state NMR. The Cu(II)-substituted MCM-41 was found to be an efficient catalyst in the oxidation of trimethylphenol (TMP) to trimethylbenzoquinone...

This manuscript reports the simultaneous electrodeposition of Cu and Rh from an aqueous nitrate solution. The early stages nucleation growth bimetallic layer were explored using techniques such as cyclic voltammetry current transients. Non-dimensional Scharifker-Hills graphs showed occurrence diffusion-controlled three-dimensional best described by Volmer-Weber mechanism. Additionally, differen...

The physiological function of copper(I)-metallothionein is not well understood. The respiratory function of hemocyanin, a copper(I)-containing respiratory protein found in the hemolymph of many invertebrates, has been known a long time. However, the mechanism by which Cu(I) is inserted into the oxygen-binding site of apohemocyanin is completely unknown. This investigation tests the hypothesis t...

The activation and catalytic performance of two representative Zr-containing intermetallic systems, namely Cu-Zr and Pd-Zr, have been comparatively studied operando using methanol steam reforming (MSR) as test reaction. Using an inverse surface science and bulk model catalyst approach, we monitored the transition of the initial metal/intermetallic compound structures into the eventual active an...

Pure TiO2 and Cu–doped containing different amounts of copper ions with anatase/rutile/brookite triphasic structure were successfully synthesized through a simple hydrothermal method. The obtained samples characterized by X–ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), transmission (TEM), photoelectron spectroscopy (XPS), UV?vis diffuse reflectance (UV-DRS), pho...