= Krynn DeArman Lukacs
{c}
= K. D. Lukacs
{c}
{synonym}
\b[<K. D. Lukacs>] is the initial-only byline of \b[Krynn DeArman Lukacs], a coauthor of early high-resolution <capillary electrophoresis> experiments with <J. W. Jorgenson>. The primary ACS publication supplies the expanded byline; the institutional CV independently identifies Krynn DeArman Lukacs and lists the same research.<Zone electrophoresis in open-tubular glass capillaries by James W. Jorgenson and Krynn DeArman Lukacs>[ACS author information, Analytical Chemistry 53(8), 1298–1302, 1981]{ref}<Curriculum Vitae of Krynn DeArman Lukacs>[April 2009, p. 1 name and p. 3 research publications]{ref} The joint byline supports joint credit, not a claim about which coauthor performed each experimental step.
Their 1981 Clinical Chemistry paper tested <electrophoresis> in a 100 cm glass tube with 75 micrometre internal diameter, applying 30 kV and observing migrating zones with a <fluorescence> detector. The reported analytes included derivatives of <amino acids>, <peptides> and urinary amines; <derivatization> was necessary for the reported detection.<Free-zone electrophoresis in glass capillaries by J. W. Jorgenson and K. D. Lukacs>[Primary publisher abstract, experimental dimensions, applied potential and detector limitation]{ref}
An original transport calculation explains how <electrophoretic mobility> affects separation. Neglecting pressure-driven flow and taking a uniform <electric field>, a solute's laboratory-frame axial <velocity> is
$$
v=(\mu_{\rm ep}+\mu_{\rm eo})E,\qquad
E=\frac{V}{L},\qquad
t=\frac{\ell}{v},
$$
where $\mu_{\rm ep}$ is its <electrophoretic mobility>, $\mu_{\rm eo}$ describes <electroosmotic flow>, $L$ is total capillary <length> and $\ell$ is distance to the detector. Using $E=3.0\times10^4$ V/m and $\ell=0.80$ m, hypothetical net mobilities $3.0\times10^{-8}$ and $4.0\times10^{-8}\,\mathrm{m^2\,V^{-1}\,s^{-1}}$ give transit times about 889 and 667 s. These are constructed transport values, not measured migration times from the paper.
Different arrival times make a separation possible, but usable resolving power also depends on band width and detector response. Conversely, an undetected analyte may reflect missing detector sensitivity rather than absent material. The reported <fluorescence> requirement therefore belongs to the scientific result, alongside the narrow capillary and high applied <electric potential difference>.
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