|
|
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
![Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.](https://biology-forums.com/gallery/47/medium_12359_26_01_13_4_03_53.png)
![A cylinder head with four valves per cylinder, two intake valves (larger) and two exhaust valves ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_02_44_293127.png)