Preparing a tissue sample from an onion

Examination of long, rectangular onion epidermal cells under the microscope at 100x magnification.

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Studying the blind spot

Demonstrating a method to determine where exactly the blind spot is in our visual field.

The patellar reflex

When the patellar ligament is lightly tapped, the extensor muscle stretches slightly.

The pupillary light reflex

In strong light the pupil contracts, while in low light it dilates.

Studying adsorption

Purifying a solution colored with fuchsine dye with finely ground activated carbon granules and...

Making a tissue sample

Examination of the cells and stomas on the epidermis of a pelargonium at 100x magnification.

Modelling protein digestion in the stomach

Let’s simulate protein digestion in the stomach using a mixture of hydrochloric acid and pepsin.

What are lichens made of?

A combination of fungal hyphae and algal cells viewed under a light microscope at a hundred...

Protein denaturation

Proteins are sensitive to environmental changes. In this video we demonstrate how easy it is to...

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