EXTRACTION methods are usually used for the isolation and purification of antibiotics soluble in organic solvents which are immiscible with water. This method can be applied if the partition ...

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 ...

The Sars-CoV-2 virus has caused a pandemic which has led to nearly 100 million cases globally by the end of 2020. The development of effective vaccines and treatments by companies and governments ...