Verification of amino acids and proteins in the human body (without subtitles) © Siemens Stiftung 2018 CC BY-SA 4.0 international

Verification of amino acids and proteins in the human body (without subtitles)

Video

Video (01:33 minutes, without sound):
The experiment shows how ninhydrin solution can be used to verify the presence of amino acids in human sweat.

English, Spanish, German
Video (23.5 MByte)
2018-04-22
A student makes a handprint on a piece of filter paper. The teacher then sprays the paper with ninhydrin solution. After a certain time and with the addition of heat, the handprint appears with a bluish-purple coloring. The heat is added to accelerate the development process. (However, the experiment works only with a very sweaty hand.)

The film is also available on the media portal as a version in which explanations are displayed as subtitles for some scenes: “Verification of amino acids and proteins in the human body (with subtitles)."

Information and ideas:
The experiment “Verification of amino acids and proteins in the human body" involves ninhydrin solution. For safety reasons, however, some teachers may not want to allow any experiments involving ninhydrin solution in their classrooms. In this case, the teachers can show the video as an alternative.
Detailed experimentation instructions are found in the medium “Verification of amino acids and proteins in the human body (student instructions)," which is available on the media portal.
Experiment
Biology; Chemistry
Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
Middle/high school
Amino acids; Metabolism
Siemens Stiftung Media Portal
MediaHouse GmbH
© Siemens Stiftung 2018
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