COLLECTION OF ANIMAL TRACKS
After a shower, the soil is soft and the animals which walked there, leave tracks. By means of plaster, you can obtain the mould of these tracks and make an
interesting collection (figure 9). The experiment is very simple: it is a question of bringing a little plaster in dry form, some water, a bowl to mix the plaster,
and a spoon to stir. But, to which animal belong the tracks you have picked up? From here start the research of information. They exist books which give the picture of the tracks of many animals. Moreover, recognizing the animal which left the track is not sufficient: it is necessary to know something of its behavior, etc. From the simple collection of tracks you will be curious to know the animals of your land. Our article: " Environmental Exploration and Protection " provides you some indication on this topic. This experiment will open your eyes so you can observe the territory around you when you walk in natural environments with more attention. Plaster can be used also to obtain the mould of fruits, barks and other natural objects. From the cast you can also obtain the original shape.
High-Performance Thin-Layer Chromatography (HPTLC) is the most advanced form of TLC and comprises the use of chromatographic layers of utmost separation efficiency and the employment of state-of-the-art instrumentation for all steps in the procedure: precise sample application, standardized reproducible chromatogram development and software controlled evaluation. HPTLC is an entire concept that includes a widely standardized methodology based on scientific facts as well as the use of validated methods for qualitative and quantitative analysis. HPTLC meets all quality requirements of today’s analytical labs, even in a fully regulated environment.