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Measuring heat flowsAll chemical, physical and biological processes are accompanied by heat flow. With the help of microcalorimetry, it is possible to measure very small heat flows down to nanoWatt regions. Isothermal microcalorimetry is particularly valuable for monitoring a variety of processes as it is a non-destructive and non-invasive technique. It does not require any prior sample treatment nor does it limit analysis to a physical state of a sample. Solids, liquids, gases, transparent and non-transparent samples alike can be analysed. In the calorimeter, the heat which is produced during these processes creates a temperature difference between the sample in the test chamber and its surroundings. The greater the intensity of the process, the higher the level of heat production and thus the greater the temperature difference. By measuring the temperature difference continuously, the intensity of the process can be determined. By observing the total heat flow, it is possible to determine the extent of the process. In TAM, an extremely stable water thermostat surrounds the sample in the test chamber. By using this in combination with sophisticated electronic techniques, very small temperature differences can be measured, so small that one can measure the temperature of bacteria. Please, visit the Thermometric's internet site to see the extensive list of microcalorimetry products and literature references. Aboatox Oy sells Thermometrics's products in Finland. Product list: www.thermometric.com
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