‎A finite group $G$ is called a $CC$-group ($Gin CC$) if the centralizer of each noncentral element of $G$ is cyclic‎. ‎In this article we determine all finite $CC$-groups.

Deep eutectic solvents (DESs) is a newly developed green solvent with low cost, easy preparation and regeneration. Because of its excellent solubility swelling effect in lignocellulose, it has received widespread attention recognition. In this study, choline-based deep (DESs)—choline chloride-urea (CC-U), choline chloride-ethylene glycol (CC-EG), chloride-glycerol (CC-G), chloride-lactic acid (...

social capital (sc) is important as much as physical capital and theorists discussed its functions in enhancement of countries. successfulness in international fields is far behind reach without due attention to capacity of countries. these capacities are known as competitiveness capacity (cc) in political literature. twelve indexes have been recognized for the cc which covers different dimensi...