NEARLY all the organic substances exhibiting gel formation in water are compounds of complex structure and high molecular weight. In order to elucidate the mechanism of gel formation, in recent years search has been made for substances of relatively low molecular weight and simple constitution, and the dye-stuffs, benzo-purpurin, chrysophenone, thionin blue, the soaps, the organic sulphonic aci...

This Special Issue of Molecules deals with the structure–activity relationship of natural compounds which possess some pharmacological/chemical properties of potential interest (from basic research to the clinical applications) in a wide range of areas, such as bacteriology, parasitology, cancerology, inflammation, etc. The molecules that have been studied in the eleven published articles of th...

A s Leona notes in a recent issue of PNAS (1), art and objects of cultural heritage hold information about the technology, trade, and aesthetics of a people. This knowledge can be accessed through chemical and material analysis combined with an understanding of the history of technology, science, and art. The information learned is of great value, especially for ancient objects that are so old ...