Analysis of radicals induced in irradiated amino acid using Pulse-ESR

Kishida, Keigo*; Kikuchi, Masahiro; Nakamura, Hideo*; Kobayashi, Yasuhiko; Ukai, Mitsuko*

JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 90, 2015/03

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2014-050.pdf#page=122

Oxygen K-edge X-ray absorption near edge structures (XANES) of sublimated films of amino acids

Tanaka, Masahito*; Nakagawa, Kazumichi*; Koketsu, Toshiyuki*; Agui, Akane; Yokoya, Akinari

Journal of Synchrotron Radiation, 8(Part2), p.1009 - 1011, 2001/03

Amino acid molecules are known to be in the state of so-called "zwitter-ion" in solid phase and its extremely low vapour pressure makes ultra high vacuum experiment such as the XANES experiment possible. Recently, C-K edge XANES spectra of aromatic amino acids were studied experimentally and theoretically. Here we selected oxygen K-edge for XANES study of amino acids. From the view point of K-edge XANES study in amino acids, oxygen is interesting because its chemical states have the wealth of variety. A carboxylic group on the carbon is in the state of carboxylic anion -COO-, while carboxylic group in side-chain stays on -COOH, and some amino acids have -OH group in side-chain. Due to this variety of chemical environment, we can expect characteristic chemical shift for each oxygen atom in various amino acids. In this paper, we report a result of oxygen K-edge XANES spectra of amino acids (glycine, L-a-alanine, b-alanine, L-serine, L-asparic acid and L-tyrosine) films. We discuss the details of spectra on the basis of DV-X calculation.

Etude sur L'Equilibre de l'Echange d'ion des terres rares avec la solution complexes des metaux lourds et des acides aminopolycarboxyliques

Bulletin of the Chemical Society of Japan, 36(1), p.4 - 20, 1963/00

https://doi.org/10.1246/bcsj.36.4

no abstracts in English

Ion-pair extractions of platinum group metals and Zr, Hf, Nb, Ta by extractant having amino N atom

Sasaki, Yuji; Matsumiya, Masahiko*; Kaneko, Masashi; Kumagai, Yuta

no journal, , 

The metal-anions formed in acidic solutions can be extracted using extractants having amino N donor, which is protonated and formed to cationic extarctant there. However, there is few systematic results using this ion-pair extraction, and the extraction behavior needs more information. Therefore, we conduct experiments using different aqueous and organic phases. The disuribution ratios of Pd, Zr, Hf, Nb, Ta are over 100, and Ru, Rh, Nb, and Ta, those are considered to be hard to extract, can be extracted using this method.