The relationship between the occupational exposure limits (OEL) and the lethal dose 50 (LD50) Values of rats or mice for metals and metallic compounds was statistically analyzed by a stepwise multivariate regression method. The OEL values were pre...
A Iizuka   M Fujii   A Yamasaki   Y Yanagisawa   
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 43(24) 7880-7887 2004年11月
We propose a new sequestration process for anthropogenic carbon dioxide (CO2) that uses waste cement. The proposed process consists of two main reactions. The first is the extraction of calcium ions (Ca2+) from waste cement particles by pressurize...
A new separation method using gas hydrate formation is proposed for separating HFC-134a from gas mixtures containing N-2 and HFC-134a. The feasibility of this separation method was investigated from various points of view. First, to determine the ...
H Tajima   A Yamasaki   F Kiyono   
ENERGY & FUELS 18(5) 1451-1456 2004年9月
Formation of CO2 hydrate using a Kenics-type static mixer was studied experimentally. The flows of liquid CO2 and water were mixed in the static mixer, and CO2 hydrate was formed continuously from the two-phase flow. The patterns of hydrate format...