chemistry

Nils Löfgren

Nils Löfgren is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nils Löfgren rather than just read about it. In short: Nils Löfgren (18 August 1913 – 21 January 1967) was a Swedish chemist who developed the anaesthetic Lidocaine (under the name Xylocaine) in 1943. At this time, he had recently finished his licentiate degree, and was teaching organic chemistry at the Stockholm University.

Key takeaways

Nils Löfgren belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nils Löfgren to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nils Löfgren from memory before moving on to harder problems.

Reference excerpt

Nils Löfgren (18 August 1913 – 21 January 1967) was a Swedish chemist who developed the anaesthetic Lidocaine (under the name Xylocaine) in 1943. At this time, he had recently finished his licentiate degree, and was teaching organic chemistry at the Stockholm University. He and his co-worker Bengt Lundqvist sold the rights to Xylocaine to the Swedish pharmaceutical company Astra AB. In 1948, Löfgren completed his doctorate, and the title of his dissertation was Studies on local anesthetics: Xylocaine: a new synthetic drug. He later became professor of organic chemistry at the Stockholm University.

References

Worked examples

Example 1 — a first encounter with Nils Löfgren

Start with the simplest possible case. Write down what Nils Löfgren claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nils Löfgren before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nils Löfgren ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nils Löfgren

In research: Nils Löfgren appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nils Löfgren in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nils Löfgren is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1913 births, 1967 deaths, 20th-century Swedish chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Nils Löfgren outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nils Löfgren in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nils Löfgren means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nils Löfgren out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nils Löfgren in simple terms?

Why does Nils Löfgren matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nils Löfgren?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nils Löfgren.