Microcomputers are the most common kind of computers in use as of 2014. The term âmicrocomputerâ was introduced with the advent of systems based on single chip microprocessors. The best-known early system was the Altair 8800, introduced in 1975.
The present invention relates to highly dispersible silica which has a high surface area, a process to manufacture the aforesaid silica and its use as a tire filler for utility vehicles, motor cycles and high speed vehicles. The use of precipitated silicas in elastomer mixtures such as tires has been known for some time.
Silica exists in crystalline forms, amorphous forms, or as silica rocks. Silica flour is the very. finely divided, highly purified form of crystalline silica (SiO 2). Crystalline silica occurs naturally in a number of different shapes referred to as polymorphs.owever, the general population is exposed dermally and orally through the use of silica flour in an array of industrial and consumer products. Insufficient information is available to determine whether oral and dermal exposure to crystalline silica poses a similar health hazard as respiratory exposures.