Hypothalamic 5-HT functional regulation through 5-HTIA and 5-HT2c receptors during pancreatic regeneration

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Synthesis and characterization of γ-Fe2O3—a magnetic tape material

Acicular FeC~O4-2H20 was precipitated from glycerol and starch media. Thermal decomposition of this oxalate in dry and moist nitrogen yielded primarily FeO and Fe 3Oa respectively. Characterization was attempted through DTA, TG, x-ray diffraction, TEM and magnetization studies. It was found that the oxalate can be completely decomposed to FeaO~ in moist nitrogen (PH~o ,"-" 35 torr) at 775 K and then oxidised by dry air to acicular "/-Fe~Oa at 575 K. The resulting material has saturation magnetization (,-,., 70 emu/g), coercive field (N300 Oe) and squareness ratio ( ,~, 0-60-0-65), which values art comparable with those of the commercial samples