WHERE TO GO NOW. While R-404A, the most popular refrigerant for commercial supermarket refrigeration, is labeled as needing POE oils, the industry has introduced a range of HFC refrigerants that do work with a range of lubricants, including mineral oil, for specific retrofit applications.
A capsid is the protein shell of a virus. It consists of several oligomeric structural subunits made of protein called protomers.The observable 3-dimensional morphological subunits, which may or may not correspond to individual proteins, are called capsomeres.The capsid encloses the genetic material of the virus.uring this process, new capsid subunits are synthesized according to the genetic material of the virus, using the protein biosynthesis mechanism of the cell. During the assembly process, a portal subunit is assembled at one vertex of the capsid.
Part of the Electronics glossary: A toroid is a coil of insulated or enameled wire wound on a donut-shaped form made of powdered iron. A toroid is used as an inductor in electronic circuits, especially at low frequencies where comparatively large inductances are necessary. A toroid has more inductance , for a given number of turns, than a solenoid with a core of the same material and similar size. This makes it possible to construct high-inductance coils of reasonable physical size and mass.