noun, Biology. 1. an orientation of an organism to an external stimulus, as light, especially by growth rather than by movement. Origin of tropism. 1895-1900. First recorded in 1895-1900; independent use of -tropism. Related forms. tropismatic.
Friction on as-grown graphene (Fig. 1c) is ultra-low and rather uniform with its magnitude close to the previous reports4. In contrast, friction on graphene after ï¬uorination becomes
In the poems, surface trivialities glide abrasively against densely crystallized ideas, producing a kinetic friction. Jacolby satterwhite The dependence of the kinetic friction coefficient on load under a speed of 100 mm/min: 1--friction between paper and print made using conventional inks, 2--friction between paper and print made using UV inks, 3--friction between paper and plane paper.