Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Tamada, Masao
Hoshasen Kagaku (Internet), (100), P. 16, 2015/10
Collection of a rare metal form hot spring water attracted medias and had a public response by reports of numerous newspapers and television programs in my 35 years' research and development of radiation processing technologies and its technology management. Collection experiments of the rare metal were carried out in Kusatsu Onsen, Gunma prefecture, where discharge of hot spring water is the largest in Japan. We were on standby 6 am there when morning live broadcast started from 8 am. The invention of emersion grafting solved the problems in the cost reduction of adsorbent production owing to its high grafting yield and led the way for technology transfer of filter for the removal of metal ions in ppb level from semiconductor cleaning liquid and adsorbent for radio-active cesium.
Matsumura, Daiju; Kobayashi, Toru; Miyazaki, Yuji; Okajima, Yuka*; Nishihata, Yasuo; Yaita, Tsuyoshi
Clay Science, 18(4), p.99 - 105, 2014/12
Kobayashi, Takanori; Yokoyama, Keiichi
no journal, ,
We have a plan for isotope separation of 
Cs by using the difference of rotational constants of CsI. In the plan, the adsorbent which can adsorb Cs species-selectively is desirable for the recovery of Cs after isotope-selective dissociation process of CsI. Paying attention to the difference of the chemical nature of CsI and Cs, fullerenes would be expected to be desirable as the adsorptive material. To confirm the idea, we have calculated the adsorption energy of Cs, CsI etc. to C
fullerene by using quantum chemistry calculation. We have also calculated the adsorption energy to the cluster model of illite, a kind of minerals which exists in soil and is known as a Cs
adsorbent. The results show that C fullerene would be suitable to adsorb Cs atom in many CsI molecules. On the contrary, illite or other minerals would not be suitable for our purpose.
Saiki, Seiichi; Shibata, Takuya; Hoshina, Hiroyuki; Ueki, Yuji; Kasai, Noboru; Seko, Noriaki
no journal, ,
no abstracts in English
Kato, Jun; Oi, Takao; Koma, Yoshikazu; Sakakibara, Tetsuro; Nakazawa, Osamu; Meguro, Yoshihiro; Ashida, Takashi
no journal, ,
no abstracts in English
Ota, Yukihiro; Ruiz-Barragan, S.*; Machida, Masahiko; Shiga, Motoyuki
no journal, ,
Exploring chemical reaction routes is a fundamental issue in quantum chemistry. A systematic way of performing this issue leads to different kinds of applications, including the prediction of novel catalytic reactions and chemical adsorption of ions on materials. In this paper, we develop a interface subroutine between a program suite of finding chemical reaction routes, GRRM14 and a semi-empirical molecular orbital method, MOPAC, to accomplish the automatic search of chemical processes in large-size molecules. We show the exploration of cation bound to usnic acid (
) and cellulose (
), as an example of the applications.
Ota, Yukihiro; Ruiz-Barragan, S.*; Machida, Masahiko; Shiga, Motoyuki
no journal, ,
The automated search of reaction routes in large-scale systems, such as proteins and biological molecules is an interesting target in computational chemistry. In this article, we show an interface program between GRRM and MOPAC to implement the automated search of chemical reaction pathways in large-scale molecules with semi-empirical methods. The interface program code is tested by ion adsorption on cellulose. We search the stable structures of 
-cellulose binding cation, focusing on 
, 
, and 
. We also show that the computational costs in the present approach significantly reduces, compared to those by GRRM with a semi-empirical method via GAMESS. The present approach is notable from the viewpoint of an efficient screening way of finding stable structures.
Yoshigoe, Akitaka
no journal, ,
In this symposium, we present recent synchrotron radiation photoelectron emission microscopy (SR-PEEM) study on Cs mapping and its electronic states in clay mineral which is artificially adsorbed in. The experiments was conducted using permanent PEEM apparatus at BL17SU in SPring-8. In addition, the future expectation of synchrotron based microscopy for surface science research, especially surface chemistry will be discussed.
Higuchi, Keita*; Okubo, Takahiro*; Negishi, Kumi*; Shibata, Masahito*; Tachi, Yukio
no journal, ,
no abstracts in English