Abstract Analytical liquidus equations were evaluated using differential scanning calorimetry (DSC) and thermal analysis (DTA). Results of 180 measurements in the Fe-C-Si-Mn-Al-P subsystems considered, where experimental methodology was demonstrated for four alloys Fe-Si-Mn-Al system. Excellent agreement between DSC/DTA dataset most recently published equation found (error 2.1 ± 1.6 °C). For th...

The ability of Alteromonas putrefaciens to obtain energy for growth by coupling the oxidation of various electron donors to dissimilatory Fe(III) or Mn(IV) reduction was investigated. A. putrefaciens grew with hydrogen, formate, lactate, or pyruvate as the sole electron donor and Fe(III) as the sole electron acceptor. Lactate and pyruvate were oxidized to acetate, which was not metabolized furt...

Both X-ray absorption and diffraction techniques were used to study the structural environment and oxidation state of Mn in goethite-groutite solid solutions, α-MnxFe1–xOOH, with xMn ≤ 0.47. Rietveld refinement of X-ray diffraction (XRD) data was employed to investigate the statistical long-range structure. The results suggest that increasing xMn leads to a gradual elongation of Fe and Mn occup...

Manganese (Mn) neurotoxicity in adults can result in psychological and neurological disturbances similar to Parkinson's disease, including extrapyramidal motor system defects and altered behaviors. Iron (Fe) deficiency is one of the most prevalent nutritional disorders in the world, affecting approximately 2 billion people, especially pregnant and lactating women, infants, toddlers, and adolesc...

IV INTRODUCTION 66 A. Structure of the Photosynthetic Apparatus of Green Plants 66 B. General Scheme of Electron Transport in the Photosynthesis of Higher Plants 67 C. The Main Types of ESR Signals Observed in Photosynthetic Systems 68 D. The Main Problems Solvable by the ESR Technique 70 PARMAGNETIC CENTERS AT EARLY STAGES OF LIGHT-INDUCED CHARGE SEPARATION IN PHOTOSYSTEM I '. 70 A. Chlorophyl...

To understand the origin of cleavage fracture which dominates in Fe Mn -Al-C alloys at a high phosphorus concentration, we performed first-principles study of the phosphorus effect on ideal cleavage energy and critical stress in -carbide, Fe3AlC, a precipitate in the austenitic alloys. We find that phosphorus has higher solubility in Fe3AlC than in -Fe and sharply reduces the cleavage character...

OBJECTIVES From our previous results, manganese (Mn) and iron (Fe) in the blood of Parkinson's disease (PD) patients without depression were higher than those of both the PD patients with depression and controls, the hypothesis that "two types of PD exist-PD without depression and affected by Mn and Fe, and PD with depression and unaffected by Mn or Fe" was induced. To investigate the hypothesi...

In this study, concentrations of trace elements in tissues of shrimp species (Litopenaeus vannamei) from farming and zone natural coastal located in the northeastern Brazil were investigated. The elements determination was performed by optical emission spectrometry with inductively coupled plasma (ICP OES). The following ranges of concentrations in the tissues were obtained in µg g-1 dry weight...