Plantes, Croissance, Développement, Métabolisme

 
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Changes of the light conditions in à deciduous pourest

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 ...

 
Détails

Numéro d´article: P1520762

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

 
Détails

Numéro d´article: P1520769

Comparação das temperaturas do solo e do arlongo do dia com 4 Cobra

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 ...
 
Détails

Numéro d´article: P1520962

Comparação das temperaturas do solo e do arlongo do dia com 4 Cobra

 
Détails

Numéro d´article: P1520969

La salinité de différents sols et substrats de plantes

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 ...

 
Détails

Numéro d´article: P1521162

La salinité de différents sols et substrats de plantes

 
Détails

Numéro d´article: P1521169

Impact of pourest type on humidity, temperature and bright- nes

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

Numéro d´article: P1521762

Effet de la température du sol sur la germination et la croissance des plantes

Principle

Genetically determined growth processes in plants are primarily triggered or inhibited by special phytohormones. However, external factors such as light, temperature, water, oxygen and air humidity play a decisive role in these processes. With
regard to temperature, there are ...

 
Détails

Numéro d´article: P4060100

Transpiration des feuilles avec 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 ...

 
Détails

Numéro d´article: P4110360

L'importance du dioxyde de carbone pour la photosynthèse et la respiration cellulaire avec 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 ...
 
Détails

Numéro d´article: P4110660

Perméabilité ionique d'une membrane cellulaire avec Cobra4

Principle

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 ...
 
Détails

Numéro d´article: P4120260

Inhibition d'enzymes par le substrat

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, ...
 
Détails

Numéro d´article: P4120460

Inhibition enzymatique (empoisonnement d'enzymes)

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 ...
 
Détails

Numéro d´article: P4120560

Activité enzymatique de la catalase avec 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 ...
 
Détails

Numéro d´article: P4120660

Principes de base de la résonance magnétique nucléaire

Principe de l'expérience

Les principes fondamentaux du phénomène de résonance magnétique nucléaire (RMN) sont explorés. Les expériences sont réalisées à l'aide d'un dispositif MRT didactisé ...

 
Détails

Numéro d´article: P5942100

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X-ray expert unit

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