Absorption studies, metal

Sham, T.-K. X-Ray Absorption Studies of Liquids Structure and Reactivity of Metal Complexes in Solution and X-Ray Photoconductivity of Hydrocarbon Solutions of Organometallics, 145, 81-106(1987). 

In a review of data on occupational chemicals that may contaminate breast milk (Byczkowski et al. 1994), it is stated that lead may be excreted in milk in amounts lethal to the infant and that the metal may be mobilized from bone stores to milk during the lactation period. Even when the concentration of lead in mother s milk is low, the absorption of metals into the systemic circulation of infants is generally high when they are on a milk diet. To better understand the sensitivity of the nursing infant to chemicals, epidemiological studies, chemical monitoring, and model development and application are needed. 

Table 10.13 Metal ion content of six different cotton samples obtained by atomic absorption studies [236]...

Concurrent stream of the development of nanomaterials for solid-state hydrogen storage comes from century-old studies of porous materials for absorption of gasses, among them porous carbon phases, better known as activated carbon. Absorption of gases in those materials follows different principles from just discussed absorption in metals. Instead of chemisorption of gas into the crystalline structure of metals, it undergoes physisorption on crystalline surfaces and in the porous structure formed by crystals. The gases have also been known to be phy-sisorbed on fine carbon fibers. 

Patterson HH (1997) Luminescence and Absorption Studies of Transition Metal Ions in Host Crystals, Pure Crystals and Surface Environments. 191 59-86 Perdew JP, see Ernzerhof M (1996) 180 1 - 30 J,seeN6ddec J-Y (1997) 185 141-174... 

Template Polymers. Template effects in chelating polymers constitute an interesting development in the field of metal containing polymers. The Template effects are interpreted by the fact that the small molecule is templating a pattern in the macromolecule which can be recognized by the same molecule in a subsequent process. The idea is to prepare a polymer from the metal-chelated monomer, to remove the metal ion, and then to measure the selectivity of the prepared polymer for the metal ion of the template [36]. Typical examples of template systems are 4-vinyl-4 -methylbipyridine (Neckers [36]) and 1-vinyl-imidazole (Tsuchida [37]). These are polymerized in presence of divinylbenzene [36] and appropriate metal salts (Co2+, Cu2+, Ni2+, Zn2+). The template metal ions are removed by acid leaching and the polymer subsequently used for metal ion absorption studies (Fig. 16). 

E. Physical Studies of the Metal Ion Environment 1. Absorption Studies... 

Luminescence and Absorption Studies of Transition Metal Ions in Host Crystals, Pure Crystals and Surface Environments H.H. Patterson... 

X-Ray Absorption Studies of Monometallic Supported Metal Catalysts... 

The CoMo/A1203 catalyst system has been studied by a variety of techniques in attempts to relate structural features of the system to catalytic performance. It is a remarkable property of this catalyst that despite high metal loading (about 15-20 wt.% based on oxides), poor crystallinity is developed. Consequently, traditional methods provide little information about the local structure of Mo and Co in these industrial catalysts and about structural changes with the preparative method. It is obvious that X-ray absorption studies are appropriate means for their characterization. 

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