Bresser National Geographic 40X-640X Bedienungsanleitung Seite 14

DANGER!
Be extremely careful when using the MicroCut, knife or scalpel. These instruments are
very sharp and pose a risk of injury.
Place the slices on a glass slide and cover them with another slide before attempting to view them with
the microscope.
6.3. Creation of your own preparation
Put the object to be observed on a glass slide and cover the object with a drop of distilled water using
the pipette (12).
Set a cover glass (available at a well-stocked hobby shop) perpendicular to the edge of the water drop,
so that the water runs along the edge of the cover glass. Now lower now the cover glass slowly over
the water drop.
7. Experiments
Now that you're familiar with your microscope's functions and how to prepare slides, you can complete
the following experiments and observe the results under your microscope.
7.1. How do You Raise Brine Shrimp?
Accessories (from your microscope set):
1. Shrimp eggs
2. Sea salt,
3. Hatchery,
4. Yeast.
The Life Cycle of Brine Shrimp
Brine shrimp, or "Artemia salina," as they are called by scientists, have an unusual and interesting life cycle.
The eggs produced by the female are hatched without ever being fertilized by a male shrimp. The shrimp
that hatch from these eggs are all females. In unusual circumstances, e.g. when the marsh dries up, the
male shrimp can hatch. These males fertilize the eggs of the females and from this mating, special eggs
come about. These eggs, so-called "winter eggs," have a thick shell, which protects them. The winter eggs
are very resistant and capable of survival if the marsh or lake dries out, killing off the entire shrimp popula-
tion. They can persist for 5-10 years in a "sleep" status. The eggs hatch when the proper environmental
conditions are reproduced. These are the type of eggs you have in your microscope set.
The Incubation of the Brine Shrimp
In order to incubate the shrimp, you fi rst need to create a salt solution that corresponds to the living condi-
tions of the shrimp. For this, put a half liter of rain or tap water in a container. Let the water sit for approx.
30 hours. Since the water evaporates over time, it is advisable to fi ll a second container with water and let
it sit for 36 hours. After the water has sat stagnant for this period of time, add half of the included sea salt
to the container and stir it until all of the salt is dissolved. Now, put a few eggs in the container and cover it
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