The Wiedemann Effect of the Magnetostriction Alloy "Alfer" at High Temperatures

The Wiedemann effect of "Alfer" (12.91 per cent Al-Fe alloy) was measured with the annealed specimen at high temperatures. As the temperature rises, the effect gradually decreases at the constant current through the specimen, and also the higher the temperature is, the weaker the field is for the maximum effect. When the current through the specimen as well as the longitudinal field is constant, the effect gradually decreases with the rise of temperature, and bcecomes extremely small at the magnetic transformation point of the Fe_3Al superlattice, and vanishes at the magnetic transformation point of α phase. The effect of Ni and Fe was measured to compare with that of Alfer. The temperature dependence of the effect of Ni is similar to that of Alfer, but that of Fe is different from both, that is, it gradually increases as the temperature rises, and after reaching a maximum at about 600℃, rapidly decreases, becoming zero at the magnetic transformation point

Isolation and amino acid sequence of the 30S ribosomal protein S19 from Mycobacterium bovis BCG

AbstractThe 30S ribosomal proteins from Mycobacterium bovis BCG were separated by reverse phase-high performance liquid chromatography (RP-HPLC). The isolated proteins were analyzed by SDS-PAGE, blotted on PVDF-membranes and subjected to sequence analyses using a gas-phase sequencer to correlate them to those of the well studied Escherichia coli and Bacillus stearothermophilus ribosomes. Moreover, the internal amino acid sequence of one ribosomal protein, MboS19, which is homologous to E. coli ribosomal protein S19 (EcoS19) and B. stearothermophilus ribosomal protein S19 (BstS19), was further analyzed by sequencing its internal peptides and two segments from the N- and C-termini of the protein were selected to deduce the sequence of two oligonucleotide primers which were used in a polymerase chain reaction. Using the amplified DNA fragment thus obtained as a hybridization probe, the gene encoding protein S19 was identified and cloned. Sequence analysis of the DNA fragment, together with peptide sequence analysis could determine the complete amino acid sequence of MboS19. This sequence proved to be 64% and 71% identical to those of the corresponding S19 proteins from the eubacteria E. coli, and B. stearothermophilus, respectively; 33% of the residues of MboS19 were identical to those in the archaebacteral ribosomal protein HmaS19

Perioperative Management for Full-Endoscopic Lumbar Discectomy: Consideration From the Perspective of Preventing Complication

In recent years, full-endoscopic discectomy (FED) has expanded its range of indications with the development of devices and various techniques. The advantage of FED over conventional surgery is that it is a minimally invasive procedure. However, intraoperative and postoperative precautions must be taken to prevent complications. It is necessary to avoid complications that could compromise the outcome of the procedure. Effective perioperative management is necessary to avoid complications; however, there is no set view for perioperative management in FED. In this study, we perform a literature review to examine the effectiveness of perioperative management methods for FED. The key to ensuring the efficacy and minimal invasiveness of FED is prevention of complications. Based on the result and literature review, we believe that the most manageable postoperative management after FED is prevention of recurrent disc herniation and hematoma formation. A drain should be placed to prevent postoperative hematoma formation. It is advisable to evaluate the patient’s symptoms and monitor C-reactive protein and erythrocyte sedimentation rate levels during the first week after surgery. Postoperative antibiotics were administered for 1 day

Chiral Soliton Lattice Formation in Monoaxial Helimagnet Yb(Ni1−x_{1-x}Cux_x)3_3Al9_9

Helical magnetic structures and its responses to external magnetic fields in Yb(Ni$_x$Cu$_{1-x}$)$_3$Al$_9$, with a chiral crystal structure of the space group $R32$, have been investigated by resonant X-ray diffraction. It is shown that the crystal chirality is reflected to the helicity of the magnetic structure by a one to one relationship, indicating that there exists an antisymmetric exchange interaction mediated via the conduction electrons. When a magnetic field is applied perpendicular to the helical axis ($c$ axis), the second harmonic peak of $(0, 0, 2q)$ develops with increasing the field. The third harmonic peak of $(0, 0, 3q)$ has also been observed for the $x$=0.06 sample. This result provides a strong evidence for the formation of a chiral magnetic soliton lattice state, a periodic array of the chiral twist of spins, which has been suggested by the characteristic magnetization curve. The helical ordering of magnetic octupole moments, accompanying with the magnetic dipole order, has also been detected.Comment: 13 pages, 18 figures, accepted for publication in J. Phys. Soc. Jp

Aerosol Route as a Versatile Method for the Processing of Hierarchically Organized Hybrid Nano Particles

Hierarchical structures, which refers to the materials that have more than one length scale, organized as the assemblage of primary units with high surface-to-volume ratio, play an important role in advanced materials design. Especially, the building of complex hierarchical structures exhibiting the hybrid organic-inorganic interfaces might be of special importance for the creation of advanced nanostructured materials having either improved or novel characteristics that bridges various scientific areas for the future diverse technological applications in catalysis, optics, energy, life science etc. Applying the bottom-up building blocks approaches, it is possible to create the hierarchical structures in a controlled manner having different morphologies, starting from aqueous, organic or colloidal precursor solutions. Among the diversity of the “bottom-up” chemical approaches, synthesis through dispersion phase (aerosol) enables generation of ultrafine, either single or complex structures with controlled stoichiometry, chemical and phase content. The opportunities of the hot wall aerosol processing, provided by high heating and cooling rates, short residence time and high surface reaction, refers to the synthesis of spherical three-dimensional (3D), hierarchically organized nanostructured particles with uniformly distributed components and phases. The particles composite inner structure, representing an assembly of nanosized primary particles, opens the possibility for particle surface modification and functionalization emphasizing their application in photovoltaics, energy transfer and bioimaging. This versatile technique has been used for the successful synthesis of hierarchically organized submicronic titanium (IV) oxide or Y2O3 up-conversion phosphor particles having the diverse levels of structural, morphological and functional complexity explored by means of appropriate selection of different precursor solutions, either true or colloid, surface modification and proper selection of rare-earth based dopants

The Wiedemann Effect of the Binary System of Iron Aluminium Alloys at High Temperatures

The Wiedemann effect was measured at high temperatures with annealed specimens of 13 Fe-Al alloys. With the addition of Al to Fe, the torsion increased at first gradually, but after reaching a maximum at the concentration of about 13 per cent Al it decreased rapidly. In alloy containing less than about 6 per cent Al it was similar to that of iron, while in the alloy containing more than about 6 per cent Al it was similar to that of "Alfer"

The Wiedemann Effect of the Magnetostriction Alloy "Alfer"

The Wiedemann effect of "Alfer" (12.91 per cent Al-Fe alloy) was measured at room temperature up to 820 Oe in longitudinal magnetic field and to 8 A in current through the specimens, 3 mm, in diameter and 150 mm in length (the circular magnetic field at the surface of the cylindrical specimen was about 10.7 Oe). It was found that the Wiedemann effect, that is, the angle of twist increased with increasing longitudinal field and after attaining a maximum value decreased gradually at the constant current through the specimen, and that the maximum value as well as the corresponding field increased with increasing current through the specimen. In a weak field, the effect increased at first at a constant rate, and then reaches a saturation value with increasing current, and in higher fields, the effect became proportional to the current. The effect of "Alfer" had the opposite sign to that of Ni, though the absolute magnitudes were nearly equal to each other