Биология

 
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Subjective colour mixing with the colour wheel

Principle

If a circular disc separated into various differently coloured sectors is rotated by a motor so fast that the eye can no longer distinguish the colours, a mixed colour is then perceived. By varying the composition and size of the sectors, it is possible to give the impression of any ...

 
Детали

Продукт No: P0872500

Water quality - contamination with heavy metals

Principle

Heavy-metal ions may be carried into surface or ground water from mining fields or via the waste water of galvanic or similar production sites. They block the effect of enzymes so that the processes in the metabolism of the organisms that are controlled by these enzymes may ...

 
Детали

Продукт No: P0990162

Mechanism of diaphragmatic respiration

Benefits
  • Graphic demonstration experiment
  • Easy to demonstrate
  • Easy to understand
 
Детали

Продукт No: P1049300

Blood pressure measurement

Tasks
  1. Determination of the systolic and diastolic blood pressure
  2. Determination of the blood pressure under physical stress
 
Детали

Продукт No: P1051100

Vision defects (model experiment)

Function and Applications

This experiment allows a vivid demonstration of short-sightedness and long-sightedness compared to the normal vision of the human eye and of how such defects can be corrected.

 
Детали

Продукт No: P1054300

Protein containing nutrients

Tasks

Learn to recognize possible tests for protein and examine various foods for protein.

 

 
Детали

Продукт No: P1256101

Detection of quinine in tonic water

Principle

Chinine is the main alkaloid of the bark of the Chinabaum. It has a typical, bitter taste and is hardly soluble in water, but soluble in alcohol, ether and chloroform

In this experiment, chinine is extracted from tonic water with an organic solvent and detected by its fluorescence ...

 
Детали

Продукт No: P1259800

Fermentation of molasse to ethanol with yeast

Principle

As a result of the need to save energy and the increased consciousness of environmental problems, biotechnological production methods are on the advance. Fermenters are used for the biotechnological production of enzymes and other products using bacteria, yeast and cell cultures. For ...

 
Детали

Продукт No: P1313600

We investigate our heartbeat - electrocardiography



Principle

The heart is a hollow, muscular organ that comprises several secondary muscles. These secondary muscles contract and relax successively, thus pumping the blood through the heart. These muscle activities can be measured electrically as a whole at the surface of the skin ...

 
Детали

Продукт No: P1332760

Elektrokardiographie with SMARTsense

 
Детали

Продукт No: P1332769

We investigate our muscular power - electromyography

Principle

With the exception of the heart muscle, the contractions of striated muscles can be controlled at will. This characteristic enables the observation of the activities of individual muscle groups. An electromyogram (EMG) can be used to measure (record) the electrical activity (i.e. ...

 
Детали

Продукт No: P1350360

We measure our eye movements - electrooculography

Principle

With this experiment, you can find evidence of the electrical activity that is generated during the movement of your eyes. Several electrodes attached to the skin of the face measure all the changes of the electrical voltage that are caused by the movement of the eyes. This ...

 
Детали

Продукт No: P1350460

Preparation of reagents

Benefits
  • Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
  • With student worksheet, appropriate for all class levels
  • With detailed instructor information, incl. sample microscopy image
  • Optimized for tight schedules, i.e. ...
 
Детали

Продукт No: P1440901

Chromoplasts

Principle
The fruits and blossoms of many plants possess intensively bright colors. The colorful fruit attracts animals, are devoured by them and the seeds are excreted at other places. This is how the plant is dispersed. Colorful blossoms attract insects that harvest nectar from the ...

 
Детали

Продукт No: P1441301

The stem of a monocotyledonous plant

Principle

The stem of plants must accomplish various functions. It supports the leaves, the lateral branches, and the blossoms. The mechanical supportive tissue (collenchyma) is responsible for the necessary stability and elasticity. Did you ever come to think about how a 20m-tall tree is ...

 
Детали

Продукт No: P1442301

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