Heterogeneous separations magnetic

Synthetic strategy Magnetically separable nano-material-catalyzed oxidative cyclization Catalyst Manganese ferrite (MnFe204) nano-particles (heterogeneous and magnetically separable)... 

Shylesh, S., Schunemann, V. and Thiel, W.R. (2010) Magnetically separable nanocatalysts bridges between homogeneous and heterogeneous... 

Kotani, M., Koike, T., Yamaguchi, K. and Mizuno, N. (2006) Ruthenium hydroxide on magnetite as a magnetically separable heterogeneous catalyst for liquid-phase oxidation and reduction. Green Chemistry, 8 (8), 735-741. 

In hard nanostructures, the magnetization is by nature highly heterogeneous and the validity of the usual demagnetizing field corrections may thus be questioned [129], Let separate the demagnetizing field Hn acting on a given nanoparticle, (/), into three contributions ... 

Magnetic heterogeneity of FC-4 was studied by magnetic separation both in gas and in liquid. Gas phase separation was done in a small cyclone-type separator, where the agglomerates were destroyed by the turbulent flow. More than 97 % of the powder was... 

Fig. 8. Heterogeneous fluoroimmunoassay using magnetic particle separation.

To determine the nature of the silicon moieties in a polymer, clearly the easiest method would be a technique that provides a direct observation of the silicon atom and meaningful, interpretable information on the atom. Nuclear magnetic resonance spectroscopy tuned to the Si isotope ( Si NMR) is a tool of this nature it can directly probe the state of the silicon atom, and with it one can often readily determine the extent to which Si-O-Si crosslinks (fi-om silanol condensation), have formed. One can observe spectra of silicon-containing compounds either dissolved in a solvent or in the solid state. Liquid-state Si NMR, while the most sensitive, cannot be used quantitatively on heterogeneous systems such a latex formulations. Therefore, one must separate the liquid and solid portions of the latex (without heat, which would promote hydrolysis and condensation) and use the solid residue for the Si NMR experiments. 

Enzyme-Linked Immunosorbent Assay. LlSAis a heterogeneous EIA technique that is widely used in clinical analyses. In this type of assay, one of the reaction components is nonspecifically adsorbed or covalently bound to the surface of a solid phase, such as that of a microtiter well, a magnetic particle, or a plastic bead. This attachment facilitates separation of bound- and free-labeled reactants. In the most common approach to using the ELISA technique, an aliquot of sample or calibrator containing the antigen to be quantitated is added to and allowed to bind with a solid phase antibody. After washing, enzyme-labeled antibody is... 

Figure 1-6 (a) A mixture of iron and sulfur is a heterogeneous mixture, (b) Like any mixture, it can be separated by physical means, such as removing the iron with a magnet. 

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