A large number and variety of homemade channels exist which confirms that in most cases, the construction of a channel is not extremely difficult.

shown in Figure 9. The channel shown has a trapezoidal cross-section which causes formation not only of a convenient, axially asymmetrical flow velocity profile but, providing the volumetric transversal flow-in and flow-out are equal, a linear velocity gradient is established across the channel. In combination with different constant velocities of different size-separated particles the conditions for the focusing phenomenon to appear are established.

Figure 9 Schematic representation of a channel for elutriation focusing FFF: (1) field force; (2) cross-flow; (3) longitudinal flow.

However, commercial FFF apparatus is increasingly available which could further stimulate interest in applying this high performance separation methodology in routine laboratory practice.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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