Video guide for using the apparatus
Discover the principles of functioning of laboratory devices by choosing a video sequence.
Transmission electron microscope
The apparatus is powered and the tungsten filament is heated. This produces a beam of electrons controlled by a system of magnetic fields. High performance pumps create a vacuum inside the column. The electrons are focused on the specimen using electromagnetic lenses.
Depending on the thickness, density, and chemical nature of the sample, the electrons are more or less absorbed and the electron beam produces a transparency image of the irradiated zone. This image is enlarged and reproduced on a phosphorescent screen.
Cell culture room
In a research laboratory, cell cultures are used to carry out various experiments. To obtain good results, cells must not be contaminated by bacteria, which are themselves widely used in experiments. This is why the equipment needed for cell culture – CO2 incubator, laminar airflow hood, centrifuge, and microscope – are grouped together in the same room that is used only for this type of experiment. This eliminates a great deal of contamination.
The mass spectrometer is an apparatus that allows us to analyze molecules according to their mass.
The components in the sample are first separated on a column. A charge is then added on the molecules and the charged molecules are analyzed and quantified by the mass spectrometer.
The results obtained will indicate if a molecule of interest is present or not in the sample. Furthermore, the mass spectrometer allows us to determine the chemical structure of the molecules by fragmenting them.
Discoveries are often the result of very long research processes. An automatic sampler is thus very useful because a great number of samples can be studied at once in a very short time. For example, in just a few days, a great number of bacteria can be analyzed to see if one of them produces a specific enzyme of interest. The same analysis, carried out by a person without this equipment, could take weeks.
Furthermore, the automatic sampler increases the reliability of the results compared to those obtained by a person doing the same work, since there are no errors resulting from long and repetitive experiments.