Biology

Richard Feynman Explains How Fire Works [Video]

He breaks down everything with such clarity and passion that he’s like a magical storyteller.

The Billion-Bug Highway You Can’t See (Video)

You may see a blue sky and maybe a plane or a bird, but otherwise … nothing. Or so you think. Learn how trillions of bugs ride the wind currents miles up in the sky.

Notes for Microbiology Final Exam

Pharmacology refers to drug administration (including dosage) and distribution in the body (pharmacokinetics). The area under the curve includes T half-life, peak concentration, time to achieve peak, elimination and protein binding. It’s one of the most important aspects of drug study, including antibiotics. Peak and Trough Let’s look at the peak and trough of gentamycin, […]

Microbiology Tests

Mannitol Salt Agar Mannitol provides the substrate for fermentation and makes the medium differential. The salt makes the medium selective because its concentration is high enough to dehydrate and kill most bacteria. Staphylococci thrive in the medium largely because of their adaptation to salty habitants, such as human skin. Most Staphylococci are able to grow […]

Lab Practicum Review

1. Identify the bacterial organelle shown. What is its function? Give the gram reaction. Organelle: Capsule. Function: Cytotoxic. Gram reaction: Indeterminate because it’s not a gram stain. 2. Name the plant pathogen shown. What is its significance? Pathogen: Claviceps purpurea. Significance? Potent hallucinogen used in religious ceremonies / Causes ergotism / Predisposes to gas gangrene […]