Use the Internet to learn how Alexander Fleming discovered penicillin. Many years passed before

Use the Internet to learn how Alexander Fleming discovered...

Key Concepts

Serendipity in Scientific Discovery

This concept highlights how unexpected observations and chance events can lead to breakthrough findings in science. Even when the initial observation seems incidental, careful attention to unusual results can reveal significant phenomena that pave the way for future advancements.

Observation and Hypothesis Formation

Central to the scientific process is the ability to observe anomalies in the natural world and develop hypotheses to explain them. This careful observation followed by formulation of testable ideas is essential in directing subsequent research and experiments.

Iterative Experimentation and Validation

The progression from an initial discovery to a fully developed application often involves a long, iterative process of testing and refinement. Incremental improvements, rigorous experimental validation, and repeated testing are all integral parts of transforming a basic scientific finding into a viable product.

Interdisciplinary Collaboration and Cumulative Knowledge

Scientific progress frequently relies on the contributions of many researchers over time, spanning multiple disciplines. The evolution from a serendipitous discovery to a practical drug underscores how shared knowledge, collaborative efforts, and building upon previous work are crucial to advancing scientific applications.

Transcript

00:01 So today i'm going to talk about the story of how penicillin, a first -line antibiotics, was discovered.

00:08 So the discovery of penicillin was a pure accident.

00:11 In 1928, a very famous scottish bacteriologist is louisiana fleming with steady staphylococcus, a type of bacteria that caused boils southbrookin and abscess in samaria hospital in london.

00:26 So he went away for a vacation.

00:28 When he came back from the vacation, he noticed something interesting.

00:32 A type of green mode grew on top of some of his bacteria plates, and the green mode actually cleared or cleared the bacteria around it.

00:43 So he noticed that there was a clear zoom around the green mode that was clear bacteria.

00:51 This green mode is called penicillium notatum.

00:53 So flamond decided that the fungi actually secret a molecule that would actually inhibit our bacteria.

01:05 So he continued to study the milk juice by isolating it and continue to study the molecule penicillin by testing it on mice and human patients.

01:16 And this molecule was named penicillin.

01:20 So due to the technical difficulties, penicillin was not stable enough to be.

01:24 Be used as a commercial drug and was able to be produced in large quantity.

01:30 Well, the mold juice had a purification issue and it was hard to be extracted and it contained large amount of impurities that would cause severe side effect to test subject.

01:43 And also due to a technical difficulty, usually penicillin had only low supplies or low yield, which is not enough to be produced in industry.

01:57 So finally, in 1940s, the department of northern region research lab in illinois of the united states invented a new fermentation technology that was good enough to produce penicillin with relatively higher quantity and also with less impure.

02:22 That was safe enough to be used on human bodies...

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