T migration

Resolution in forced-flow development is not restricted by the same limitations that apply to capillary flow controlled systems. The maximum resolution achieved usually corresponds to the optimum mobile phase velocity and R, increases approximately linearly with the solven)t migration distance (48). Thus there is... 

Fig. 1 Schematic representation of the separation principle of MEKC. An EOF/ micelle marker and three solutes differing in lipophilicity in the presence of anionic micelles in the background buffer are present. The lipophilicity increases in the sequence Sj < S2 < S3 t—migration time of EOF (nonionic solutes) S (solute) me —micelle.

The isoelectric points are different pH = 9.6 for lysine and pH = 5.97 for glycine. An aqueous solution of the mixture is placed between two electrodes, the pH adjusted to either 5.97 or 9.6, and an electric current applied. At pH 5.97, glycine doesn t migrate, while cationic lysine migrates to the cathode, where it is collected. At pH 9.6, lysine doesn t migrate, while anionic glycine migrates to the anode. 

Covalent bonds form between atoms with similar electronegativities. In compounds held together by covalent bonds, electrons don t migrate from one atom to another as they do in ionic bonds. Instead, they are shared by the atoms in the molecule. One way to visualize this was proposed by Gilbert Lewis, a chemist at the University of California, Berkeley. His representations of molecular bonds are called Lewis dot structures. These... 

G migrating group S = migration source T = migration terminus... 

Separation of an amino acid mixture by electrophoresis. At pH s 5.97, glycine molecules are neutral and don t migrate lysine molecules are protonated and migrate toward the negative electrode and aspartic acid molecules are deprotonated and migrate toward the positive electrode. 

Jakubick, A. T., "Migration of Plutonium in Natural Soils", Transuranium Nuclides in the Environment Proceedings of the Symposium organized by ERDA and IAEA in San Francisco,... 

Due to this important feature, aptamers with high ko([ values can still be used for quantitative affinity analyses by NECEEM. This also makes the method applicable to systems in which L T migrates so slowly that L T dissociates to an undetectable level by the time it reaches the detector. 

Leading ion L in the zone of leading electrolyte A and terminating ion T" in adjusted zone t migrate with the same velocity. Adjusted zone t is separated from initial zone Tq of the terminating electrolyte by a stationary concentration boundary. It is characterized by the same qualitative composition on both sides of the boundary. However, the concentrations of ion T" are different. 

Figure 3-6 shows the damaged areas of the core as now known from the available information (OECD, 1994). It can be calculated that about 50 per cent of the zirconium present in the TMI-2 core reacted with water to produce hydrogen and that practically all the volatile fission products were released by the core into the primary circuit and hence, through the stuck open relief valve, into the containment building. Forty-five per cent (62 t) of the fuel melted and about 20 t migrated from their original position and collected on the vessel bottom head. 

Soczewinski, E. Czapinska, K. Wawrzynowicz, T. Migration off zones off test dyes in preparative thin-layer chromatography Stepwise gradient elution. Sep. Sci. Technol. 1987, 22 (8), 2101-2110. 

Wire diameter (L), weight of sample (M), moisture content at time t, powder mass flow rate (M/T), migration velocity in Equation 10.46 (L/T), mass of solids deposited on the medium per unit volume of filtrate (M/L )... 

Fig. 2. Schematic presentation of a zone electrophoreogram. Identification is carried out on the time axis, according to the different positions of the peak maxima of separands a, b, c, etc., t- migration time, C- analyte concentration, is the distance between the peak maxima of two subsequent components migrating with times t and t, expressed in units given by the standard deviation cr c-...

Calvo, D., Saenz-Lopez, R., Femandez-Zurbano, P., Tena, M. T. Migration order of wine anthoeyanins in capillary zone electrophoresis. Anal. Chim. Acta 524,207,207-213,2004. 

Lj = length of capillaty to detector L, = total length of capillary t = migration time... 

---