منابع مشابه
Investigation of Crystalline Phases in the α-Fe2O3/α-Al2O3 System*
Mixtures containing the desired weight ratios of 2 3 -Fe O α and γ-AlOOH were homogenized in the planetary mill, then pressed into tablets and heated up to 1200 °C. All samples were characterized by X-ray diffraction, Mössbauer spectroscopy, Field emission scanning electron microscopy and Energy dispersive X-ray analysis. Two types of solid solutions of general formula 12 3 -(Al Fe ) O x x α we...
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We present the observation of a new intermediate redshift damped Lyα absorption system candidate, discovered in the course of a spectroscopic follow-up for identifying the sources detected in a 150Å-wide bandpass UV-imaging survey at 2000Å. The system displays very strong Mg ii and Fe ii lines and a high Fe ii/Mg ii ratio, which, following photoionization models, indicates a very high neutral h...
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Recent evidence suggests that Paracoccidioides species have the potential to undergo sexual reproduction, although no sexual cycle has been identified either in nature or under laboratory conditions. In the present work we detected low expression levels of the heterothallic MAT loci genes MAT1-1 and MAT1-2, the α-pheromone (PBα) gene, and the α- and a-pheromone receptor (PREB and PREA) genes in...
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We report the discovery and analysis of the most metal-poor damped Lyman α (DLA) system currently known, based on observations made with the Keck HIRES spectrograph. The metal paucity of this system has only permitted the determination of three element abundances: [C/H]=−3.43± 0.06, [O/H]=−3.05± 0.05 and [Si/H]=−3.21± 0.05, as well as an upper limit on the abundance of iron: [Fe/H] ≤ −2.81. Thi...
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In recent years supramolecular structures built from macrocyclic compounds have attracted tremendous interest due to the unique properties derived from dynamic self-assembly. Our study proposes a two-step mechanism to form a supramolecular hydrogel system: (1) the formation of micelles, and (2) micelle association with α-cyclodextrin (α-CD) due to threading of PEGMA in the α-CD cavity, forming ...
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ژورنال
عنوان ژورنال: Journal of Thermal Analysis and Calorimetry
سال: 2017
ISSN: 1388-6150,1588-2926
DOI: 10.1007/s10973-017-6769-3