Posts of the Category: Labwork
This category contains posts with labwork that can be done in a school.
An overview of mounting media for microscopy
Mounting media are needed for making permanent slides. The mounting medium holds the specimens in place between the cover slip and the slide. The choice of the right mounting medium is a separate topic all on its own. There are countless commercial and home-made mounting media available. Which ones should one use? In many cases [...]
Choosing the right mounting medium for making permanent slides
There are numerous different mounting media available for making permanent slides. What factors determine the choice of the mounting medium? Here are some possible points to consider. Toxicity: Solvent-based mounting media (such as Eukitt and Canada Balsam) require the specimen to be in xylene prior to embedding. This substance is toxic. Other mounting media, such [...]
Staining bacteria
Here is yet another link to an article from Popular Science magazine. It deals with the isolation, fixing and staining of bacteria. I would not recommend the use of some of the solvents that they use (such as xylol) with children, however. They also describe a blood smear preparation, what I do not recommend for [...]
Stains and reagents for microscopy
I found an article in Popular Science Magazine (see link below) which gives a general overview of different stains that can be used in microscopy. The article divides the stains into three categories: Common household chemicals: this includes Iodine, for example. They are very readily available. Substances used mostly for microscopy: Methylene blue, Hematoxyline, and [...]
Introductory Microscopy Projects for Schools
Are you looking for simple microscopy projects for classrooms? Here is a list of ideas. Do not forget about safety measures!
Making a Soil Culture for Growing Algae
It may be necessary to grow large amounts of green algae (and other microorganisms) to be used for microscopic observations in schools. A soil culture allows you to enrich various types of algae.
Observing Potato Starch Grains
Potato starch grains are an ideal for observation in polarized light and in dark-field. Sample preparation is simple and straight-forward.
Dry-mounted permanent slides
Wings of insects, small insects and other small specimens do not have to be enclosed in a mounting-medium, they can also be dry-mounted. If they are completely dry, then they will also store for a long time.