Our working group participated at the open day of the HSBI (Bielefeld University of Applied Sciences and Arts). At our stand titled „Elektrisierter Algenextrakt und und vieles mehr“, the working group presented two separate experiments with polymers derived from algae.
Firstly, we allowed participants to create calcium alginate beads by dropping liquid sodium-alginate into a second liquid, namely calcium chloride (CaCl2). The calcium ions interact with the alginate so that gel beads are formed. The many participants, but especially the children, were delighted when they were able to take home the colorful alginate beads they created. Secondly, we performed a gel electrophoresis experiment with agarose, another algae derived polymer. Gel electrophoresis is a ubiquitous laboratory method to analyze DNA, RNA, or proteins by separating mixtures according to their molecular size and charge. However, we chose to separate a range of vibrant dyes instead of nucleic acids or proteins. Attendees were invited to pipette a range of colorful dyes and dye mixtures into the of the agarose gel and examine their movement in the gel once an electric field was applied.
We were happy to introduce these algal biopolymers and their applications to numerous interested attendees of the open day and the many participants at our stand.
Links: https://www.hsbi.de/programm/tag-der-offenen-tuer-2023, https://www.hsbi.de/programm/tag-der-offenen-tuer-2023/06-05-2023-elektrisierter-algenextrakt-und-vieles-mehr-eine-spannende-reise-durch-die-welt-der-biopolymere