science

Nikolai Lunin (scientist)

Nikolai Lunin (scientist) is a science 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 Nikolai Lunin (scientist) rather than just read about it. In short: Nikolai Ivanovich Lunin (21 May 1854 – 18 June 1937) was a Russian Empire and later Soviet scientist who was the first to discover the existence of vitamins. As a student in Basel, he fed mice on a diet of proteins, fats, sugar, salts and water, but they died.

Key takeaways

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

Reference excerpt

Nikolai Ivanovich Lunin (21 May 1854 – 18 June 1937) was a Russian Empire and later Soviet scientist who was the first to discover the existence of vitamins. As a student in Basel, he fed mice on a diet of proteins, fats, sugar, salts and water, but they died. He concluded that in addition to casein, fat, milk sugar and salts, milk must contain other substances that are indispensable for nutrition. His dissertation was published abroad in 1881, however other scientists were unable to replicate his work. Lunin had used cane sugar, but others used ill-purified milk sugar, which turned out to contain vitamin B, which saved the mice. Frederick Gowland Hopkins, in his Nobel Prize lecture, references Lunin's work.

Lunin is buried at Volkovo Cemetery in St Petersburg, next to his wife, who died two years before him.

References

External links Cherkes, L. A. (1955). "N. I. Lunin and his role in the initial stage of vitaminology". Arkhiv Patologii. 17 (1): 69–75. ISSN 0004-1955. PMID 14377975. Article in Russian Voss, H. E. (1 April 1956). "Nicolai I. Lunin—1853–1937. A Biographical Essay". Journal of the American Dietetic Association. 32 (4): 317–320. doi:10.1016/S0002-8223(21)16075-4. ISSN 0002-8223. Retrieved 13 February 2023.

Illustrations

Worked examples

Example 1 — a first encounter with Nikolai Lunin (scientist)

Start with the simplest possible case. Write down what Nikolai Lunin (scientist) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Nikolai Lunin (scientist) 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 Nikolai Lunin (scientist) 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 Nikolai Lunin (scientist)

In research: Nikolai Lunin (scientist) appears in science 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 Nikolai Lunin (scientist) 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: Nikolai Lunin (scientist) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1854 births, 1937 deaths, Burials at Volkovo Cemetery, so understanding it makes those chapters shorter.
In everyday life: Look for Nikolai Lunin (scientist) 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 Nikolai Lunin (scientist) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nikolai Lunin (scientist) 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 Nikolai Lunin (scientist) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nikolai Lunin (scientist) in simple terms?

Why does Nikolai Lunin (scientist) matter?

Because it connects several science 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 Nikolai Lunin (scientist)?

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 Nikolai Lunin (scientist).