THE applications and limitations of one- and two-dimensional paper chromatographic techniques have been well documented 1. There remain, however, problems in the separation of certain compounds which ...

COMPARATIVELY little use has been made of paper chromatography for micro or semimicro preparative purposes. A difficulty encountered in such work is that of applying relatively large quantities of ...

Due to their simultaneous expression, enveloped virus-like particles (VLPs) and extracellular vesicles (EVs) are difficult to distinguish and separate for analytical purposes. In addition to their ...

The roots of chromatography can be traced back to the early 20th century when Mikhail Tswett introduced the concept of liquid-phase chromatography. Over the years, chromatography techniques have ...

Annals of Botany, New Series, Vol. 37, No. 149 (January 1973), pp. 167-183 (17 pages) A previous investigation of volatile isothiocyanates had produced evidence for the existence of two geographic ...