still used today; this technology couples a GC to an IR, which detects compounds by applying IR. to the gas effluent. Recent improvements in the hyphenated technique, GC/IR, may provide a simple alternative or. supplemental approach to GC/MS for the identification of certain compounds.
Vans' classic shoe style is made out of canvas, and sometimes suedeor leather. The brand makes an effort to create environmentallysustainable footwear, and uses recycled materials wheneverpossible.
There is no real awnser but the first shoe was a sandal made out of flat pieces of wood and mats of grass , they were open toed shoes . They say there wasn't a real inventor but W.A Deitz invented them so he could protect his feet from rocks. Of course they weren't name brand shoes.