Vapor pre-adsorption thin-layer chromatography and its application to the separation of aliphatic aldehydes

construction and validation of translation metacognitive strategy questionnaire and its application to translation quality

like any other learning activity, translation is a problem solving activity which involves executing parallel cognitive processes. the ability to think about these higher processes, plan, organize, monitor and evaluate the most influential executive cognitive processes is what flavell (1975) called “metacognition” which encompasses raising awareness of mental processes as well as using effectiv...

Separation of Cholesterol and Demosterol by Thin-layer Chromatography.

Strategies of sunscreen separation by thin layer chromatography.

So far sunscreens separation has been achieved primarily by HPLC or TLC on RP-18 or (less frequently) unmodified silica gel as stationary phase. The conditions of chromatographic separation published so far are not suitable for many combinations of UV filters found commonly in cosmetic products. It is therefore reasonable to seek alternative conditions that would make it possible to separate th...

Separation of plasma lipids by thin-layer chromatography.

A rapid comprehensive thin-layer chromatographic separation of the major plasma lipid classes on commercial silicic acid glass fiber paper is described. For screening purposes, oxidized fractions are rapidly visualized for qualitative interpretation. Standard colorimetric procedures for each lipid class are per­ formed upon the migration areas cut from the strips. This provides quantitative mea...

Separation of Cholesterol from Its Companions, Cholestanol and Delta-7-cholestenol, by Thin-layer Chromatography.