Ask a Dermatologist: The Best Skin (and Beard) Right Now. While spring is a time for renewal, fall is when men settle into habits: growing a beard, leaving the hair loose, figuring out what the hell to do in the bathroom each morning when it's not even light enough out to see the damn mirror. Fall's also the season when our skin starts to feel stiffer and tighter.
Definition: Water filtration is a general term that refers to any type of filtration system or process that is used to filter out particles and/or pollutants from water.Water filtration systems can include activated carbon filters, UV light units, reverse osmosis, water distillers, or other water treatment process.efinition: Water filtration is a general term that refers to any type of filtration system or process that is used to filter out particles and/or pollutants from water.
In all types of mechanical filtration, a pressure gradient is required to move material through the filtering media. Chemical filtration uses differences in the chemical properties of molecules to perform separations. The driving force can be different rates of diffusion, or chemical reactivity. Biological filtration, used in some aquariums, uses a filter with living bacteria to break down harmful components in the water. You could say that the driving force is celular metabolism, or life itself.