The article presents the results of improving methods for diagnosing energy oil “Tp-30” pumping unit NPP equipment coolant circulation system. When studying physicochemical and thermophysical properties this oil, it was found that: indicators “acid number”, “water content”, “content mechanical impurities”, additive “Ionol”, “flash point”, “kinematic viscosity” correspond to established standard...

Carboxylic acids, amides and imides are key organic systems which provide understanding of molecular recognition and binding phenomena important in biological and pharmaceutical settings. In this context, studies of their mutual interactions and compatibility through co-crystallization may pave the way for greater understanding and new applications of their combinations. Extensive co-crystalliz...

The title compound, C(30)H(50)O(3), which was isolated from a marine endophytic fungus, is a new friedelan derivative. The mol-ecule contains five six-membered rings, which exhibit boat (ring A), distorted boat (ring B) and chair (rings C-E) conformations. The crystal structure is stabilized by inter-molecular O-H⋯O hydrogen bonds, which link neighbouring mol-ecules into 12-membered rings.