Eine einfache Methode zur quantitativen Bestimmung von Aminos�uren auf Papierchromatogrammen

Development of Collagen in the Frog Embryo

“…(It would also be qualitatively misleading to rely on densities at a single wave length.) Hydrolyzates of Stage 18 or younger embryos, to which varying amounts of hydroxyproline had been added, would provide a more valid source of standard curves. The use of such standards is described below but, first, attention is directed to Table 1, column 5, which lists the hydroxyproline contents per embryo based on the admittedly rough values of this series.…”

“…In Series IV, both aqueous hydroxyproline solutions and hydrolyzates of Stage 18 embryos, to which known amounts of hydroxyproline had been added, were used as standards. Because Series III had focused attention on Stages 18-25 as the developmental period when hydroxyproline was appearing, the analyses of Series IV were confined to these stages.…”

Review - Pharmaceuticals and Natural Drugs

“…Included in these is a "three-point" attachment to the cellulose surface (90). Various quantitative paper chromatographic methods for the separation and determination of amino acids in mixtures are reported in the recent literature (61,141,183,274,301,312,317). Displacement chromatography on ion exchangers has been used also in the separation and determination of amino acids (273).…”

Biochemical Analysis

“…Basic studies for improving the ninhydrin determination of amino acids have been reported (60,215,462,506) as well as substitute methods for detecting amino acids (255). Some investigators have restudied the application of the micro-Kj eldahl method for this purpose (260).…”