#07 Biochemistry Protein Characterization Lecture for Kevin Ahern’s BB 450/550

Another Monday beckons, another week beckons. One day closer to an exam. Student: Whoo! Kevin Ahern: Yay, huh? One day closer to your opportunity to show me how much you know. That’s good. I hope you had a good weekend. Student: Fantastic. Kevin Ahern: Fantastic? Student: We won. Kevin Ahern: Are we talking about football […]

Study English – Series 1, Episode 2: Vitamin D

Hello. I’m Margot Politis. Welcome to Study English, IELTS preparation. Today, we’re going to look at ways of discussing a topic. When you’re writing or speaking, you can present facts, or you can use your opinion – but how can you tell the difference? Today we’ll find out. We’re going to listen to a scientist […]

Inside the Cell Membrane

Captions are on! Click CC button at bottom right to turn off. Updates on Twitter (@AmoebaSisters) and Facebook! In my second year of teaching, I was looking to improve an osmosis lab I had had done the year previously. Osmosis, if you remember from our osmosis video, involves water traveling through a semi-permeable membrane. Potentially […]

Polyprotic (NB)

INSTRUCTOR: Let’s try to sketch the titration curve for a polyprotic weak acid. So I’ve chosen here histidine. And what I’d like to do is sketch the titration curve for 100 mils of 0.1 molar histidine as it’s titrated with 1 molar sodium hydroxide. And we can also talk about which species are present when […]

Strong Acid-Base Titration

PROFESSOR: Titration is the process of reacting acid and base together. And I do that in a controlled way. So I can take an acid solution and a base. The acid solution will originally have low pH, a high acid concentration. As you add base, that base will react with the acid and lower that […]

Iron Oxide Reaction (Quiz)

PROFESSOR: Let’s look at a reaction with iron oxide that produces molten iron. So, which of the following– carbon, iron, or aluminum– should I react with iron oxide– and I’ll give you a hint, it will be an exchange reaction. The metals will exchange the oxygen– to form molten iron. Think about that for a […]

#06 Biochemistry Protein Purification Lecture for Kevin Ahern’s BB 450/550

Captioning provided by Disability Access Services at Oregon State University. Kevin Ahern: So we’re moving along nicely with the schedule. And though we don’t have to stay on it exactly, we’ve been on it pretty good. I’ve been pleased with the interactions and also pleased with the questions I’m getting, both in class and out […]

#29 Biochemistry Citric Acid Cycle II Lecture for Kevin Ahern’s BB 451/551

Kevin Ahern: This is really bad. I was not fishing for that. The second is some of you have noted that there are some discrepancies between what I talk about with E1, E2, and E3, and what the book says. The book is actually more precise than I am, and I’m trying to simplify this […]

Barking NO CS2 Tube Demo

PROFESSOR: We’re in the demo lab with Lonnie to see a controlled explosion. Lonnie is going to react carbon disulfide and NO gas. The reaction releases a tremendous amount of energy, 3,000 kilojoules per mole. But the kinetics is such that the reaction actually occurs relatively slowly. It’s a complex chemical reaction involving many steps. […]