Metals, seperation

Nil2 (0001) (lxl) Bulk Nil2 is a layer compound with hexagonal metal layers and oc-tohedral coordination in a cubic unit cell. At the surface the bulk Ni-I bond length of 2.78 A decreases by O.O36 0.O1O A and the I-I seperation of 3.89 A decreases by -0.48 0.010. SEXAFS/15/... 

This treatise describes the entire process of preparing the philosopher s stone. There are three seperate operations described here the preperation of the secret fire (the catalyst or solvent which is used throughout the whole work, without which nothing can be achieved, but which is seldom if ever mentioned in any alchemical treatise), the preperation of mercury (a metallic vapor made from antimony and iron, said to resemble vulgar mercury (Hg) in appearance, necessary in the preparation of the stone) and the preperation of the stone itself. 

Tbe extraction of phenol has been used by Schlosser and Kossaczky11 and Halwachs et al.16 as a model for studying liquid-membrane transport. The former group compared the liquid-membrane method to a conventional liquid-liquid double extraction process. They concluded thet liquid membranes have disliact economic ndvsmages in cases where type I or type 2 facilitation methods can be used (e.g., phanel or metal ion extractions). However, where one must rely on simple differential permeation (bydrocarbon seperations) rhe ndvantage is less clear-cut. 

In contrast to free-radical polymerization, in anionic polymerization it is possible to change gradually the structure of the active center passing from the ion-covalent carbon-metal bond to the ion pair and, in the limit, to a free anion by increasing the polarity and solvating ability of the solvent. For the simplification of the interaction picture without reducing the consideration area five basic states of the carbon-metal bond in an anionic active center will be considered 1) the slightly polar carbon-metal bond (R-X), 2) the polarised carbon-metal bond (Re X ), 3) the contact ion pair (Re, X ), 4) the solvent-seperated ion pair (Re X ) and 5) the free anion (Re + X ). 

Inoue, K., Hirakawa, H., Ishikawa, Y, Yamagu-chi, T., Nagata, J., Ohto, K., and Yoshizuka, K. (1996). Adsorption of metal ions on gallium(III)-templated oxine type of chemically modified chitosan. Seperation Science and Technology 31(16), 2273-2285. 

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