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9982-1005960
9982-1005961
3 B S c i e n t i f i c ® B i o l o g y
Exper iment s
Genet i cs / Osmos i s
Visualizing Osmosis and Diffusion
Vividly demonstrate selective permeability using coloured solutions. Start-
ing with a model cell and a mixture of special dye solutions, your students
will observe how the cell’s membrane allows one dye to pass, while the
other remains within the cell. The resulting colour change provides a vivid
demonstration of selective permeability and how the cell absorbs nutrients
and discharges waste. The class will also learn how osmosis and diffusion
permit the maintenance of equilibrium through the passive transport of
water through the cell’s semi permeable membrane.
Scope of delivery:
1 Red dye solution (30 ml), 1 Blue dye solution (30 ml), 20 clear cups,
1 Dialysistubing (4 m), 1 Glucose solution (250 ml), 50 Glucose test strips,
60 Medicine cups, 20 Plastic pipettes, 1 Starch indicator solution (30 ml)
(IKI), 1 Starch solution (250 ml), 1 String (4m).
32x24x17 cm; 3 kg
&
D/E
9982-1005961
Osmosis Simulation Activity Model
A striking, visual demonstration of osmosis! Quick and easy demonstration
provides a solid understanding of osmosis and how it occurs. Your students
will gain insight into this critical process as water diffuses across a semi-
permeable membrane from an area of higher concentration to an area of
lower concentration. The process can be repeated using a variety of solutes
in varying concentrations to observe the change in results. The outcome
can even be quantified by measuring the amount of liquid that travelled
across the membrane.
Scope of delivery:
2 L-Shaped clear tubing, 1 Capillary tube, 1 One-hole rubber stopper,
1 Stand, 1 Food colouring solution (30 ml), 1 Rubber band, 1 Ruler,
10 Semi-permeable membrane sheets, 1 Sucrose (171 g).
30x22x10 cm; 1.5 kg
&
D/E/I
9982-1005960
DNA Extraction from Onion
With this easy test on the theme of cellular biology and genetics, you can
isolate chromosomal DNA from an onion without a long preparation time,
during a class. Your students will learn thanks to this experiment about
the basic process of DNA extraction. Everything is included in the kit so
that 5 groups can work at the same time. This effective classroom experi-
ment with a high DNA yield will provide enjoyment for your students.
Contents for 15 experiments:
80 ml extraction buffer, 500 mg protease mix, 15 flat-bottomed tubes,
15 round paper filters, 5 funnels, 15 wooden picks, experiment instructions
(multilingual).
Dimensions:
20.5x20.5x10.5 cm
Weight:
534 g
&
D/E/F/S/J/R
9982-1010264
Refill Pack for DNA Extraction from Onion
(not shown)
80 ml extraction buffer, 500 mg protease mix, 15 round paper filters.
9982-1010266
Fast and
highly-effective
experiment
