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. 2022 Jan 12;41(1):19–24. doi: 10.1089/dna.2021.0497

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© Luciano A. Abriata 2022; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons License [CC-BY] (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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FIG. 1. — (A) Red cabbage-based pH indicator is popular in DIY activities for general chemistry courses. As prepared, the solution has a pH of 6–7 (center). Addition of vinegar decreases the pH to ∼4 (left) and addition of sodium bicarbonate increases it to ∼8 (right), both evidenced by clear color changes. (B) Screen capture of the Physics Toolbox Sensor Suite, a free smartphone app that records and logs all sensors available in a device. (C) Smartphone screen capture showing a heme group (sticks) inside cytochrome c oxidase (cartoons) from PDB ID 1EHK processed through moleculARweb, a website for chemistry and structural biology education at (https://molecularweb.epfl.ch). (D) Screen capture of a tablet showing a detailed 3D model of an eukaryotic cell nucleus of and the surrounding Golgi apparatus, directly from Google. 3D, three-dimensional; DIY, do-it-yourself.