Inkjet printable compositions containing styrenic polymers, typically cyano-functional styrenic polymers, with relatively high dielectric constants k, along with additional optional ingredients, such as inorganic particles are disclosed. A transgenic mouse in which the expression of hnRNP A1 gene has been disrupted is also provided. Accordingly, the bumper reinforcement of the invention has achieved high rigidity against the impact applied and easy manufacturing with high cost performance and capability of various designing of the vehicles. The invention also relates to a cosmetic process for moisturizing the skin comprising the application to the skin of a composition as defined above. The present invention further provides an electronic key system including an electricalelectronic key-like device and an intelligent electricalelectronic key receptacle wherein the system is capable of performing a transaction between the key-like device and the key receptacle after the key-like device is inserted into the key receptacle and moved to a predetermined position. The in-line mixer is then placed within a conduit proximate to the desired location, and a flow of a clean fluid is provided from an upper portion of the conduit past the in-line mixer and into a lower portion of the conduit.