Extraction of keratin

EN: This video is from the STEM teaching material "Climapse" which is part of the project "Act Now for the UN Sustainable Development Goals" where teachers from 12 countries developed hands-on teaching concepts on how to implement the 17 UN Sustainable Development Goals in STEM classes. Climapse is a blend of climate and timelapse. This teaching material consists of three parts which can be combined individually for different age groups and depending on the available equipment. The material first raises awareness of the strong signs of climate change and its impact in Europe using timelapses. Following this, students can work as scientists by gathering their own data with microcontrollers and by analysing scientific data and satellite imagery to create their own time series. This should lead students to take action for their future based on their scientific findings. The video “Creatine extraction” illustrates the experiment described in the text. The subtitles are in English. In the chemistry laboratory, the pupils can extract the keratin and examine the components of wool. The experiment consists of: - the extraction of keratin from wool with a suitable extraction solution; - flocculation of keratin using a protein denaturant; - the recovery of keratin powder by decantation or centrifugation. DE: Das Video "Kreatinextraktion" illustriert die im Text beschriebene Versuchsdurchführung. Die Untertitel sind in englischer Sprache. Im Chemielabor können die Schülerinnen das Keratin extrahieren und die Bestandteile von Wolle untersuchen. Der Versuch besteht aus: - der Extraktion von Keratin aus Wolle mit einer geeigneten Extraktionslösung; - der Ausflockung von Keratin unter Verwendung eines Proteindenaturierungsmittels; - der Rückgewinnung von Keratinpulver durch Dekantieren oder Zentrifugieren.