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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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To help students understand how cell membrane integrity is affected by the environment surrounding the cell. Beetroot membranes are a good model for investigating this because the pigments that diffus.. more
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Covers the fundamental activities that use plants, and includes advice on which plants to use and how to keep plants at school. 
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A simple investigation, with clear procedural advice, on looking at how chemicals affect the cytoplasm of red onion epidermal cells.
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This document contains:An outline of colorimetryThe principles of the CLEAPSS colorimeterUsing a CLEAPSS colorimeter which has been set upSetting up the CLEAPSS colorimeterproducing a calibration curv.. more
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Outlines the most common cultures of bacteria and fungi used in microbiology, and how to store cultures.
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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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Using lead metal, lead oxides, bromide, nitrate(V),ethanoate, and others, safely in practical work.
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Using chromium metal, chromium salts, chrome alum, chromates and dichromates, safely in practical work.
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This edition includes notes on the HSE input to the annual CLEAPSS safety conference, managing ionising radiations, an incident with nital, problems with silicon tetrachloride, new flammables cabinets.. more
words matched: pigments

Showing results 1 to 10 of 22
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