Растения, рост, развитие, метаболизм

Changes of the light conditions in a deciduous forest

Principle

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. This experiment shows how the ...

Changes of the light condition in a forest with SMARTsenses in a deciduous forest

Comparison of soil and air temperatures in the course of a day with Cobra4

Principle

How does the temperature of the air affect the temperature of the soil in the course of a day?

Benefits

• Experiment is part of an experiment set with numerous experiments in ecology
• Universal handheld measurement device can also be used for other measurement parameters ...

Comparison of soil and air temperatures with SMARTsense course of a day with Cobra4

Salinity of soils and plant substrates

Principle

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 salts for plant growth and to ...

Salinity of soils and plant substrates with SMARTsense

Impact of the forest type on humidity, temperature and

• Measurement of air humidity, air temperature and light intensity in various types of forests

Effect of the soil temperature on the germination and growth of higher plants

Transpiration of leaves with Cobra4

Principle

Plants "sweat" just as people do and are thereby physiologically and morphologically suited to their specific environment. They transpire at high temperatures and pass water to the environment. Transpiration also serves for the transport of water and nutrients. The underpressure ...

The importance of carbon dioxide for photosynthesis and cellular respiration with Cobra4

Principle

This experiment shows that carbon dioxide is consumed during photosynthesis when a plant is exposed to light, whereas carbon dioxide is produced through plant cellular respiration when dark.

Benefits

• Compact, easily transportable setup
• For both demonstration and ...

Ionic permeability of the cell membrane with Cobra4

The cell membrane controls the transport of nutrients and water into the cell, and of waste products and water out of the cell. This can take place passively, e.g. on the basis of osmotic processes (differences in concentration), as well as actively.

Benefits

• Compact, easily ...

Substrate inhibition of enzymes with Cobra4

Principle

The enzymatic hydrolysis of urea in aqueous solution liberates carbon dioxide and ammonia. The ions of these compounds increase the conductivity of the solution. Inhibition of the enzyme by the substrate occures at excessive substrate concentrations.

Benefits

• Compact, ...

Enzyme inhibition (poisoning of enzymes) with Cobra4

Principle

The enzymatic hydrolysis of urea in aqueous solutions liberates carbon dioxide and ammonia. The ions of these compounds increase the conductivity of the solution.

Benefits

• Compact, easily transportable setup
• For both demonstration and student experiments
• Flexible ...

Enzymatic activity of catalase with Cobra4

Principle

Catalase is an enzyme that - in humans - is found predominantly in the liver and erythrocytes. It decomposes hydrogen peroxide, which is a toxic byproduct of cellular respiration, into water and oxygen.

Benefits

• Compact, easily transportable setup
• For both demonstration ...

Fundamental principles of Nuclear Magnetic Resonance (NMR)

Principle

The fundamental principles concerning the phenomenon of nuclear magnetic resonance (NMR) are demonstrated. Experiments are executed with a MRT training device giving the opportunity to investigate some small probes in the sample chamber. Investigations comprise the tuning ...