منابع مشابه
In-situ Sub-micrometer Surface Flow Velocity Measurment
We have measured the flow velocity at a sub-micrometer distance from a flow channel wall by tracing the refractive index boundary of two consecutively flowed liquids. Using the surface plasmon resonance method to measure the surface proximity refractive index, we were able to measure the velocity without using additional tracer materials. This velocimetry can be performed while simultaneously m...
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An X-ray diffraction line will broaden considerably when steels change into martensitic structure on quenching. The results presented in this paper show that X-ray diffraction technique can be employed for a rapid and nondestructive measurement of hardness of hardened steel. Measurement on various quenched and tempered steels showed that the breadth of its diffraction peak increased with increa...
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A carbon solid acid with large surface area (CSALA) was prepared by partial carbonization of H₃PO₄ pre-treated peanut shells followed by sulfonation with concentrated H₂SO₄. The structure and acidity of CSALA were characterized by N₂ adsorption-desorption, scanning electron microscopy (SEM), X-ray powder diffraction (XRD), 13C cross polarization (CP)/magic angle spinning (MAS) nuclear magnetic ...
متن کاملPreparation of High Surface Area ZrO2 Nanoparticles
In comparison to the previous researches, ZrO2 nanoparticles with higher surface area (85 m2/g) have been synthesized in this research. The as-prepared ZrO2 nanoparticles by co-precipitation method were characterized with X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The surface area of the s...
متن کاملGibbs’ Phenomenon and Surface Area
If a function f is of bounded variation on TN (N ≥ 1) and {φn} is a positive approximate identity, we prove that the area of the graph of f ∗φn converges from below to the relaxed area of the graph of f . Moreover we give asymptotic estimates for the area of the graph of the square partial sums of multiple Fourier series of functions with suitable discontinuities.
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Colour Material
سال: 1962
ISSN: 0010-180X
DOI: 10.4011/shikizai1937.35.17