However, they can be programmed with a variety of gradient index (GRIN ... enabling complex 3D GRIN structure not possible with traditional processes that rely on diffusion. We have created a number ...

This diffusion was also quantified by measuring ... as activators and repressors appears to be consistent with other gradient-based signaling cascades, such as that for Hh in the fruit fly.

Diffusion Substances move from a high to a lower concentration down a concentration gradient Carbon dioxide, oxygen, water, food substances, wastes, eg urea No Osmosis Water moves from a high to a ...

This is due to the random movement of the molecules. The direction of diffusion is said to be 'down' or 'with' the concentration gradient. Diffusion stops when the concentration of the substance ...

As with any diffusion theory, there must be a gradient in the distribution of particles, and some mechanism by which the particles are scattered. But in the magnetosphere collisions between ...