Oxygen and carbon dioxide, dissolved in water, are exchanged by diffusion in the lungs: The dissolved substances will only continue to diffuse while there is a concentration gradient. Blood flow ...

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 ...

Secondly, the paper describes novel applications of diffusion equations to model concentration gradients of nutrients and signaling factors in three-dimensional (3D) tissue constructs under a ...

Thus, via this hierarchy of protein concentration profiles, the shape information that is encoded in the gradient gets transformed into a ... formation - self-organization based on reaction-diffusion ...

In particular, by experimental and theoretical approaches, they demonstrated that pure diffusion in a growing tissue is sufficient to explain the AN3 gradient formation. This work provides ...

A concentration gradient in the electrolyte is illustrated. ·If the electrolyte is unstirred, the gradiant causes H-ion diffusion to the surface, where they capture electrons (reduction) to become ...

By using a low-viscosity silicone oil and fine-tuning the fabrication process, they've made the SlipChip more reliable for cell-based experiments and simpler for creating concentration gradients.