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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..
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words matched: beta-carotene
Describes in detail the routine tests of radioactive sources and the equipment needed to carry them out. Includes equipment, available to schools, but which is unsuitable for such tests.
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Detailed advice on features to look for when considering the purchase of equipment for radioactive practical work in schools.
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A rather technical publication intended predominantly for manufacturers of radioactive sources and school employers.
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Editorial; Why do we do practical work?, Developing the role of practical work in science, managing egg collections, soldering (no further use of lead), pupils in prep rooms, gloves update, pupils con..
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Health and safety information on the use of radioactive sources in practical school science activities.
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A suite of 3D printable accessories to perform various experiments with school radioactive sources.
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Clear instructions for building two versions of a cloud chamber. One uses dry ice as the cooling agent, the other uses an inexpensive electronic coolers which is quite simple to make.
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A straightforward practical which can be undertaken by post-16 students as well as done as a demonstration.
words matched: beta-carotene
This explains how to estimate the radioactivity of instruments which have dials painted with radium paint. Such dials are now getting very old and the paint will be deteriorating and possibly flaking ..
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