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Winter 2023, Volume 39, No. 1

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Winter 2023, Vol. 39, No. 1

X-ray diffraction measurement of layered manganese dioxide that can store/release heat repeatedly by desorbing/absorbing water molecules to/from moist air

Norihiko L. Okamoto, Takuya Hatakeyama, Hongyi Li and Tetsu Ichitsubo

Discovery of thermal storage materials that can utilize low-temperature waste heat

We have discovered that layered manganese dioxide (birnessite, δ-MnO₂) can store/release heat through an intercalation mechanism in which water molecules in a moist atmosphere are deintercalated/intercalated between the layers. The material has been found to have an excellent balance...

3D molecular visualization of a human antibody by MAXS measurement reveals significant differences between the solution and crystalline states

Takashi Matsumoto, Akihito Yamano, and Takashi Sato

X-ray solution scattering experiments have been utilized to analyze structures and conformational changes of biological macromolecules. Those experiments employ X-ray scattering data in a small-angle region, a technique called Small Angle X-ray Scattering (SAXS). SAXS experiments often focus on the macroscopic shapes and sizes of molecules. However, in principle, the...

Atomic-scale structural analysis by total scattering profiles

Masatsugu Yoshimoto*

In the past, total scattering data was used to obtain the pair distribution function (PDF) G(r). However, it has become clear that it is also possible to calculate characteristic values related to the physical properties of materials from the total scattering data. In this paper, we introduce two applications using...

X-ray fluorescence analysis of liquid samples without helium gas

Yuri Maruko

Helium gas is becoming more difficult to obtain these days due to decreased supply and increased demand. In X-ray fluorescence analysis, helium gas is often used in the analysis of liquid samples, while processing samples as solids is possible under a vacuum. In this article we introduce two liquid sample...

Basics of X-ray CT reconstruction--Principles and applications of iterative reconstruction

Takumi Ohta

This article describes the principles and applications of iterative reconstruction in X-ray computed tomography. We use several real examples to show how iterative reconstruction can produce higher-quality reconstructed images than the conventional reconstruction method.

This article describes the principles and applications of iterative reconstruction (IR) methods. Section 2 describes the...

NEX CG II Advanced Cartesian Geometry EDXRF

NEX CG II is a multi-element, multi-purpose energy dispersive X-ray fluorescence (EDXRF) spectrometer that performs rapid qualitative and quantitative trace elemental analyses and addresses needs across many industries. This next-generation, high-end spectrometer is ideal for trace heavy metal and halogen analysis, which is in increasing demand for several sectors. These...