Colouration of an onion skin

LB4.1.2.4

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Description

In this experiment, the students microscope an onion skin stained with methylene blue. They realise that staining microscope slides leads to higher contrast images and that selective staining of certain cell compartments is possible. In the case of methylene blue as a vital dye, the cell walls and cell nuclei of onion cells are stained particularly strongly.

Components of equipment sets

1	EUPB111 4	Dissection kit, 6 pieces
1	662016 8	Blades, 5 pieces
1	662093 4	Microscope slides 76 mm x 26 mm x 1 mm, set of 50
1	662092 4	Cover slips
1	667018 4	Laboratory knife
1	6659531 4	Dropping pipette 150 mm x 7 mm Ø
1	6659541 8	Rubber bulb
1	MIK5738860 8	Microscop EduLed FLQ
1	610010 8	Laboratory safety goggles
1	6732920 4	Methylene blue solution, 100 ml Warning H226 H319
1	6719720 4	Ethanol, denaturated, 1 l Danger H225 H319
1	6753410 4	Water, pure, 5 l

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Colouration of an onion skin

Description

Components of equipment sets

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