An interesting demonstration of how gold can be extracted from printed circuit boards (PCB’s) and RAM trimmings (which I did not know was a thing). The yield is low, but NileRed gives full detail, including the chemical equations, which is why I may show this to my chemistry class.
Tag: videos
WW2 in Real Time
TimeGhost is an utterly amazing project. They’re currently going through World War II, week by week, in real time. That is, every week they post a really good summary of what happened in the corresponding week of the war.
They’ve also done WWI in the same way and have ancillary channels about other conflicts, like the Cuban Missile Crisis Day by Day.
Definitely, worth a look.
How the Immune System Works
Awesome video by Kurzgesagt explaining “Why You Are Still Alive“.
Proteins – via Food Science
An excellent overview of proteins from Dr. Kiki Sanford of Food Science. Of particular importance: denaturation.
Meiosis
Going over meiosis in class today I used two videos. The first one was a bit simple. The second contained perhaps too much detail, but I showed it twice and stopped it at a few points on the second showing to point out the differences between mitosis and meiosis. I particularly wanted to highlight how genes are shuffled so the resulting reproductive cells have very different DNA from their parent. The shuffling is important because we’ll be comparing the advantages and disadvantages of asexual versus sexual reproduction later this week, as well as using Punnet squares to talk about heredity.
The first video:
The second:
