Introduction

Analysis and sorting of living cells and purification of cell organelles are important procedures in the life sciences. There is a wide range of techniques and methodologies available, which can be divided into three main groups. The techniques in the first groups are based on physical criteria such as species size, density and shape, and include centrifugation, elutri-ation and field flow fractionation. Those in the second group are linked to cell surface characteristics, while flow cytometry techniques make up the third group. At a fundamental level, field flow fractionation (FFF) exploits the physical characteristics of the cells or cell organelles. However, cells or cell organelles exhibit some specific characteristics that can be described by a multipolydispersity matrix. The different physical characteristics of these biological materials require different FFF techniques and modes of operation. Special care must be taken if biological integrity and viability are to be preserved.

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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