A cooling air system for motor vehicles has a radiator that is arranged in a front-end area of a motor vehicle and through which a cooling air stream flows. A structure of a video data storage portion of the control circuit is that provided with a video data storage portion for storing video data of an n-th frame, a video data storage portion for storing video data of an th frame, and a video data storage portion for sharing video data of the n-th frame and the th frame among received video data. A dielectric layer with first openings is patterned to expose a portion of a conductive line of the dice. The outer periphery has a plurality of regions defined along said axial length, wherein a first region extends over a predetermined first portion of said axial length and has a helical groove path defining a series of axially spaced apart grooves formed therein. These HABAylated avidins are red colored in the quinone configuration and can be used in many applications in the avidin-biotin technology.