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Cat Hair

Egg Shell Membrane

Spaghetti

Pork

Amaryllis - Pollen

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Corona, Covid19, protective masks, fabrics, textiles and pore sizes

Corona virus SARS-CoV-2

The corona virus SARS-CoV-2 is tiny!
Its diameter is only 125 nm, so it cannot even be seen with a light microscope.

Contagious droplets

The virus is usually transmitted via droplets in the air. Most droplets are also very small. About 5000nm ( 5µm).

Face mask: which fabric?

Homemade face masks should ideally be able to catch these droplets. To do this, the pores must at least be small enough that the droplets stick to the fabric.

Cherry blossoms under the microscope

What splendour: Our microcosm journey into the innermost part of a cherry blossom was worthwhile (1):
Several pollen sacs surround the scar (2).
Under the light microscope, the pollen on the pollen sacs shine like small gems (3,4).
And under the scanning electron microscope, the individual pollen reveal their unique structures (5,6) at 1500x and 2500x magnification!

Hair under the microscope


1) Bumblebee hairs with pollen.
2) Healthy human hair,
3) Human hair with split ends.
4) Cat hair
5) Dog hair
6) Mouse hairs

Viewed through a scanning electron microscope. 

Particle sizes influence taste, compatibility, processing quality! 

The size of the particles - be it in food, pharmaceuticals or building materials - is responsible for many qualities of a product.

- Large particles taste crumbly, small ones creamy. But we cannot taste too tiny.
- Small particles are usually easier to mix and blend, but can also cause harmful fine dust.

Particle size measurement is a good way of characterising them. A classical measuring method is statistical laser diffraction. For this, the particles to be analysed are held in a laser beam and the resulting diffraction pattern is analysed.

The disadvantage is obvious: statistical data are collected. Outliers get lost in the masses. In addition, usually only the size is recorded, but not the shape and structure of the individual particles. But these are also extremely important functional and quality characteristics.

Scanning electron microscopy is a useful method of simultaneously recording all these properties - size, shape, structure, distributions - at the same time. It records the size, structure and, if necessary, also the contents of each individual component.