Notes on Experiment 16:
- Go over the details of the well prep carefully. This includes not cutting to the bottom of the dish, not putting wells too close to each other, etc. Basically, make sure they know to take all precautions for keeping the solutions inside the wells and not all over the place.
- Mention that the red lead is, contrary to most of the electronics world, the ground. They should be using the black and green leads to take measurements.
- Use Raw Voltage 0-5 (not any of the other options) when you set up the voltmeter.
- Impress on students the importance of washing their hands if they don't want to be eating lead or cadmium with their lunch/dinner.
- I suggest to my students that they bend the metal strips so that one end is in the well, and the other is resting on the edge of the dish. This allows them to simply touch the leads to the metal strips, rather than painstakingly clipping and unclipping each one and/or removing and replacing strips from the wells.
- From Lindsay: having your students start the agar gel prep before prelab can also save time; this allows you to give your prelab lecture while the gels are cooling.