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Principle
The enzymatic hydrolysis of urea in an aquous solution yields carbon dioxide and ammonia. The ions of these compounds increase the conductivity of the solution. The speed of urea hydrolysis, which is caused by the urease enzyme, can be de ...
The enzymatic hydrolysis of urea in aqueous solution liberates carbondioxide and ammonia. The ions of these compounds increase the conductivity of the solution. Conductivity measurements can therefore be used to measure the rate of hydrolysis of urea ...
The enzymatic hydrolysis of urea in aqueous solution liberates carbon dioxide and ammonia. The ions of these compounds increase the conductivity of the solution. Conductivity measurements enable the rate of hydrolysis of urea by the enzyme urease to b ...
This experiment shows how much the quality of drinking water of various locations in the same region can vary. The comparison of tap water with bottled mineral water and distilled water leads to surprising results.
The compact Cobra4 Weather multisensor makes for fitting out your own weatherstation with little means. It allows the relations between air pressure, humidity and temperature, and also brightness, to be made understandable. Fluctuations over a period ...
The compact Cobra4 "Weather" multisensor can be employed as a simple means to setup a weather station, which can then be used to explain the relationship between the air pressure, humidity, temperature, and the light intensity. The measurement combina ...
Dew or frost can be formed on the inside of windows, although one has the feeling that the air in the room is quite dry. A cellar cannot be dehumidified on warm days in summer by simply opening the cellar window. This experiment shows why.
Why are there only a few different kinds of plants in a deciduous forest? Except for having trees that are all approximately of the same height, hardly any other plants grow in a deciduous forest, except for young plants of the same type of trees. Th ...
The pH value (a measure of the concentration of hydrogen ions) in running waters depends on the geological conditions, the pollution load that is caused by agricultural production, and on plant activities. This experiment shows how the pH value of a ...
How does the temperature of the air affect the temperature of the soil in the course of a day?
Information concerning the quality of soils is of great importance for agricultural production. The students are familiarised with this subject via two experiments with pH measurements that show how much soils may differ from each other (experiment&n ...
Demonstration experiment using wireless data communication to send readings to a large-size display. Knowledge of soil characteristics is highly important for agriculture. To familiarise students with this topic, two sub-experiments use pH readings t ...
How suitable are certain soils and plant substrates for the nutrition of plants? This experiment is about measuring the conductivity, which in turn provides information as to which of the examined soils and plant substrates already contain nutrient sa ...
PHYWE presents the new x-ray unit: innovative technology, top safety, maximum comfort!
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