Definition of presense

(Harry H. Hull, "The Normal Forces and Their Ther...)

However , they do demonstrate the presence of large normal pressures in the presence of flat shear fields which were forecast by the theory in the first part of the paper .

However , they do demonstrate the presence of large normal pressures in the presence of flat shear fields which were forecast by the theory in the first part of the paper .

(James A. Ibers et al., "Proton magnetic resonance...)

The x-ray_diffraction pattern of the material , taken with CuKla radiation , indicated the presence of no extra lines and was in good agreement with the pattern of Douglass .

One sample , which had been exposed to the atmosphere after evacuation at 375 ` C , showed the presence of adsorbed water ( about 0.3 wt % ) as evidenced by a weak resonance line which was very narrow at room_temperature and which disappeared , due_to broadening , at low_temperature .

(Jay C. Harris and John R. Van Wazer, "Detergent...)

The washing process whereby soils are removed consists basically of applying mechanical action to loosen the dirt particles and dried matter in the presence of water which helps to float off the debris and acts , to some extent , as a dissolving and solvating agent .