Few families of compounds have been as intensely studied as iron porphyrin complexes. In spite of this, a truly four-coordinate Fe(III) porphyrin cation has never before been reported.1 The exceptional electrophilicity of the four-coordinate [FeIII(Porph)]+ cation will even coordinate arene solvent upon crystallization if the counteranion is extremely non-coordinating, as in the work of Reed wi...

Kandungan logam berat pada sedimen sungai Batang Agam segmen Kota Bukittinggi telah diidentifikasi. Sampel diambil aliran sepanjang 3 km 6 titik sampel. Enam sampel yang kemudian di uji XRF untuk mengetahui kandungan beratnya. Hasil menunjukan bahwa mengandung Cr, Mn, Fe, Ni, Zn, Cu, As dan Pb. Konsentrasi rata-rata Sungai sudah melebihi ambang batas tetapkan, yaitu Cr (206,6 ppm), Mn (3646,6 F...

Through systematic density functional calculations using the full potential linearized augmented plane-wave method, extraordinary large magnetostrictions are found in Fe-based alloys with appropriate mixing of metalloid and 5d element. For instance, tetragonal magnetostrictive coefficients of Fe87.5Pt6.25Ga6.25 and Fe75Pt6.25Ge18.75 in their model structures can reach to +943 ppm and −3553 ppm,...

This research studies the characterization of activated carbon from tamarind seed with KOH activation. The effects of 0.5 : 1-1.5 : 1 KOH : tamarind seed charcoal ratios and 500-700°C activation temperatures were studied. FTIR, SEM-EDS, XRD, and BET were used to characterize tamarind seed and the activated carbon prepared from them. Proximate analysis, percent yield, iodine number, methylene bl...

An actinomycete, strain I06-2230(T), was isolated from rhizosphere soil of the plant Cephalotaxus fortunei, collected from Yunnan province, south China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolate belongs to the genus Actinopolymorpha. Cells grew on agar surfaces, with no penetration even after prolonged cultivation. Aerial hyphae were absent. Cells were ir...

[1] High-resolution x-ray diffraction provides evidence that potassium (K) alloys with iron (Fe) when the two pure elements are heated together at pressures above 26 gigapascals (GPa). Increases of 2–3% in volume of the e (hexagonal close packed: hcp) high-pressure phase of Fe can be attributed to the incorporation of 1 atomic% ( 7000 ppm by weight) K into Fe. Our results provide experimental s...

Mineral profile of tree leaves from eight local species (Acacia modesta, Albezia lebbeck, Capparis aphyla, Prosopes Juliflora, Tecoma undulata, Olea cuspidate, Ziziphus mauritiana and Ziziphus jujuba) was evaluated for feeding to sheep and goats. Leave samples were collected from three different locations (Surgul, Shakardara and Gumbat) in Kohat district of Khyber Pakhtunkhwa, Pakistan province...

Assessment the efficiency of Fenton process (Fe 2+ /H2O2), versus photo-Fenton reaction (TiO2/Fe 2+ /H2O2/UV) for removal of Chloropyrifos, and COD from pesticide wastewater were investigated. Solar compound parabolic collectors (CPC) pilot scale with borosilicate tubes was used for photo-Fenton process. The effect of reaction time, initial pH and dosage of H2O2, FeSO4, TiO2 were studied for bo...

Perinatal iron deficiency (PID) has been reported to induce developmental abnormalities, including cardiovascular complications in rats. These complications are believed to be "programmed" by an aberrant perinatal environment because the changes persist long after the insult is corrected (ie, despite subsequent iron replenishment). Little is known about the mechanisms by which PID affects blood...