Neher and Wettstein (1) have recently published the details of a paper chromatographic method for the separation of weakly polar steroids, with a heptane-phenyl Cellosolve solvent system. Savard (2) has described the separation of 17-ketosteroids on paper with ligroin as the mobile phase and propylene glycol as the stationary phase. Starting from the basic work of these authors, a method has be...

The oxidation properties of n-heptane have been investigated by conducting experiments in a laminar flow reactor at pressures 21 and 100 bar, near-stoichiometric ( ? = 0.9 $\varPhi =0.9$ ) fuel-lean conditions 0.1 =0.1$ ), temperatures 450–900 K. At bar stoichiometric conditions, negative temperature coefficient (NTC) region was detected around 600 increased pressure or oxygen concentration, th...