Helling CS, Chesters G, Corey RB (1964) Contribution of organic matter and clay to soil cation-exchange
capacity as affected by pH of the saturating solution.
In their research, the scientists purified bacteriocin KU24 using column-, cation-exchange
and gel-filtration chromatography.
Recent research produced a high-productivity, strong cation-exchange
adsorber for protein capture by graft polymerization onto membranes of differing pore sizes.
During the process, cations are replaced with hydrogen ions using cation-exchange
resins; anions are replaced with hydroxyls using anion-exchange resins.
We were the first received and investigated new phosphate cation-exchange
resins, nitrogen-phosphorus containing ion-exchange resins using chemical transformation of benzyl bromide-furfural polymers (Tursunov and Nazirova, 1985b; 1985c).
Rapid analysis of hemoglobin variants by cation-exchange
Ideally pH and ([SIGMA]Exi) or CEC should be constant across the entire isotherm to generate cation-exchange
isotherm despite that the pH and CEC constancy in soil clay minerals is rarely obtained (Evangelou and Lumbanraja 2002).
2) Although electrophoresis at alkaline and acid pH has been widely used for many years, the emergence of cation-exchange
high-performance liquid chromatography, or HPLC, as the method of choice for quantification of HbA2 and Hb Hand identification of Hb variants, (9) streamlined the recommended preliminary and follow-up tests for the identification of hemoglobinopathies and thalassemias, and provided rapid and complete diagnostic work-up in a majority of eases.
Samples were then evaporated to dryness and subjected to the process of acid-dissolution, cation-exchange
, and filament loading described above with the exception of the initial HF and HN[O.
Reversed-phase (RP) and cation-exchange
HPLC are often applied, and the latter enables the quantification of various Hb fractions, including HbF and Hb[A.
1997a, b) reported not only the production of diethoxymethane by the reaction of ethanol and formaldehyde, but also 1,3-dioxolane production by cyclic acetalization of ethylene glycol with formaldehyde in the presence of the cation-exchange
resin catalyst in a reactive distillation column.
Because the charge of the polymer (~1800 meq) is much larger than that of the phosphorus, their cation-exchange
capacity is very high, and the cations in the soil (calcium, iron, magnesium, and aluminum) are attracted to the polymer, leaving a much greater percentage of phosphorus available to serve as a nutrient.