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A pencil is sharpened at both ends and crocodile clips attached at each end. These are connected to a low voltage power supply. The voltage is increased and the wooden casing quickly starts to produce.. more
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Amino acids can be identified and separated using paper chromatography, a cheaper alternative to using TLC. The amino acids need to be stained with ninhydrin to reveal the spots after the run.
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Thin layer chromatography is a quick and effective method of separating pigments within leaves. The pigments run clearly on the chromatogram with little outward spread, allowing Rf values to be calcul.. more
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It is becoming increasingly difficult to determine the composition of food dyes in an unknown mixture, because formulations have been altered over time, and, as a consequence, the results never match .. more
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A guide describing some simple, inexpensive and successful methods for carrying out paper and thin layer chromatography, illustrated with examples using biro ink and lipstick.
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During this challenge-based activity visiting children learn to follow a written method and pipette dropwise without contaminating samples.
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A simple yet engaging set of 3 activities which use matches (rather than Bunsen burners) for a transition event.
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• 'Required' practicals for A Levels• Dissecting whole guts of animals• PS081 Fireworks & Explosives - Update• The Thermite Reaction - new method!• HAZCARDS - Now fully revised and available to bu.. more
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A few ideas to help teachers & technicians quickly check that practical resources are returned at the end of the lesson.
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This document tells you how to convert your smart phone into a microscope camera to take extremely close pictures of objects which cannot be seen easily with the naked eye. The lens used is a focusing.. more
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