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This document explores the advantages and disadvantages of three methods of looking at stomata, including direct observation with a microscope, epidermal peels and nail varnish imprints.
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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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The chemistry of extracting substances from plant materials is important because many such compounds are physically active, either medically or aesthetically (perfumes). This guide describe a small-s.. more
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Risk assessment guidance for nitric(V) acid (HNO3).
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Using nitric acid safely in practical work
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Make-it guide: standard test source for checking a GM counting system
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This guidance is for restoration or disposal of the lead-pot wooden boxes that are commonly used for supplying and storing 'cup-style' sealed sources in school science departments.
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This edition includes notes on changes to allowable methods of disposing of surplus or waste chemicals, issues with solid fuel tablets as used in model steam engines, the value and use of butcher's bi.. more
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This edition includes notes on, stress as an 'industrial disease' in education, the supply of some wrongly labelled chemicals, a device which can be fitted to temporarily hold open a door for the deli.. more
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Showing results 1 to 10 of 41
1 2345