These include diffusion of particles, convection (in which hotter material rises), alterations to particles caused by traveling through the magnetic field, and loss of other types of energy ...

Diffusion is the movement of particles from higher to lower concentrations. Diffusion happens naturally and so does not require energy. Substances like oxygen, carbon dioxide and glucose move in ...

Mucus presents a formidable barrier to nanoparticle drug-delivery systems, but adding a coating of polymer molecules helps them sneak through the net. Mucus, the amorphous, sticky substance that ...