CLEAPSS Supporting practical science and technology
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Guidance on preparing the stains needed for gram staining - to distinguish between Gram-positive and Gram-negative bacteria.
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An updated method of staining gram-positive and gram-negative bacteria using basic equipment. 
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Observing gram-positive and gram-negative bacteria using a microscope with oil immersion lens.
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Make-it guide on how to make a staining rack and drip tray for gram staining microbes.
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Using common dyes and indicators safely in practical activities. Many such compounds , or their solvents, are hazardous but are used in such small amounts and in a very controlled way so as to limit e.. more
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Risk assessment guidance for dyes, indicators and stains.
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Complete index for the Student Safety Sheets
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Index to currently published guidance on the preparation of specific solutions and other reagents. Includes a summary Contents List giving the dates of the most recent versions of recipes. Note: this .. more
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An index to all the chemicals included in the 2016 Edition Hazcards and later updates. Includes Hazcard numbers and Recipe references.
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All-in-one pdf file of the CLP Recipe sheets published (or updated) up to, and including, 9th March 2021.
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