en

John Carreyrou

Audiobooks

Quotes

dina004dhas quoted4 months ago
The first commercial spectrophotometer was developed in 1941 by the American chemist Arnold Beckman, founder of the lab equipment maker Beckman Coulter. It works by beaming rays of colored light through a blood
dina004dhas quoted4 months ago
sample and measuring how much of the light the sample absorbs. The concentration of a molecule in the blood is then inferred from the level of light absorption. Spectrophotometers are used to measure substances like cholesterol, glucose, and hemoglobin. Cytometry, a way of counting blood cells, was invented in the nineteenth century. It’s used to diagnose anemia and blood cancers, among other disorders.
fb2epub
Drag & drop your files (not more than 5 at once)