Harumi Kitano

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In a superconductor, the ratio of the carrier density, n, to its effective mass, m*, is a fundamental property directly reflecting the length scale of the superfluid flow, the London penetration depth, λ(L). In two-dimensional systems, this ratio n/m* (~1/λ(L)(2)) determines the effective Fermi temperature, T(F). We report a sharp peak in the x-dependence(More)
The initial dissolution rates of amorphous, partial crystalline and crystalline samples of terfenadine polymorphs (forms I and II) were measured by the rotating disk method. The heats of fusion due to crystalline fraction of samples were obtained by the differential scanning calorimetry (DSC) data taking into account the heat of crystallization and the heat(More)
Purpose. The aim of this study is to estimate the initialdissolution rate of drug substances by isothermal microcalorimetry. A theorywas presented on the basis of Gibbs free energy and the Noyes—Whitneyequation. Methods. Polymorphic forms and quenched glass ofindomethacin, and some different crystallinity samples of terfenadine wereused. The heats of(More)
We have developed a non-optically probing near-field microscope with illumination of total internal reflection. Because the illumination light does not pass through the specimens, it is possible to observe thick specimens or highly absorptive materials. It reduces the background noise because the decay length of the evanescent wave is a few hundred(More)
The evanescent perturbation technique utilizing open-ended coaxial resonator probes was investigated as a nondestructive method for measuring the dielectric properties of insulating substrates in the microwave frequency region. As an investigative result, we have proposed a new formulaic method of data analysis by which the complex permittivity of samples,(More)
For measuring high-frequency properties of materials by resonant techniques, one needs to obtain the resonant characteristics of the resonator, i.e., the resonant frequency f/sub R/ and the bandwidth of the resonance f/sub B/. For precise measurements, accurate and real-time determination of the resonant characteristics is required. We present a complex(More)
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