The products can control the environment inside the packaging bags and prevent the diffusion of gases
such as oxygen, carbon dioxide and ethylene.
Diffusion of gases
is emphasized in this representation, and it is important to note that gases, like liquids, diffuse from regions of greater to lesser concentration.
Condition the container so that steady-state diffusion of gases
Gas particle interchange as a result of Brownian motion contributes to the diffusion of gases
in the respiratory tract.
These two specific welding defects formation are generally assumed to be caused by diffusion of gases
that are introduced, during welding process, in melted metals bath or to gases being in base materials from other manufacturing processes.
Shortly thereafter, Michael Faraday and Thomas Graham, two scientific pioneers known primarily for their work with electricity and diffusion of gases
, respectively, contributed further to the analysis of nanoparticulate suspensions, i.
The first term changes with time because of outwards diffusion of gases
inside the cells and inwards diffusion of air; this leads to a worsening of insulating properties with time, which is known as thermal ageing and represents one of the major drawbacks of the use of those materials.
Barrier applications isolate patient contact surfaces from medical equipment, protect medical instrumentation from damage by bodily fluids and moisture, or allow the diffusion of gases
from one stream to another.
Moisture migration, solubility of gases, diffusion of gases
, yeast, and drying and condensation are discussed in a chapter dedicated to frozen doughs.
Aerosols are formed by diffusion of gases
and liquids in air (Sharma 1992).
In Eq 1 the contributions of solid conduction and radiation are constant with time, while the contribution of gas conduction, which represents at least 50% of the total thermal conductivity, changes with time because of outward diffusion of gases
inside the cells and inward diffusion of air.