chemistry

Hans Stammreich

Hans Stammreich 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 Hans Stammreich rather than just read about it. In short: Hans Stammreich (July 16, 1902 in Remscheid, Prussia, Germany - March 6, 1969 in São Paulo, Brazil), was a Brazilian chemist of German origin and an important pioneer of Raman spectroscopy and molecular spectroscopy. Life After obtaining his PhD in physical chemistry after studying under Adolf Miethe at Technische Hochschule Berlin (today Technische Universität Berlin), Stammreich became soon, partly influenced by h…

Key takeaways

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

Reference excerpt

Hans Stammreich (July 16, 1902 in Remscheid, Prussia, Germany - March 6, 1969 in São Paulo, Brazil), was a Brazilian chemist of German origin and an important pioneer of Raman spectroscopy and molecular spectroscopy.

Life

After obtaining his PhD in physical chemistry after studying under Adolf Miethe at Technische Hochschule Berlin (today Technische Universität Berlin), Stammreich became soon, partly influenced by his personal friendship with Albert Einstein, interested in molecular spectroscopy, especially Raman spectroscopy. In the summer of 1924 he joined the Photochemistry Institute of the Berlin Polytechnic as an assistant researching the apparent formation of gold in Mercury lamps. In 1927 he was appointed permanent head assistant of the department. In 1920 he married Charlotte Marcuse a laboratory assistant in the institute. In 1930 he was appointed to by in charge to organize and direct the Spectroscopy and Spectral Analysis section of the Polytechnic school. He held this position until 1933, when he was dismissed and forced to seek refuge in France due to his Jewish background and Hitler's rise to power. He lived in Paris, where he stayed until 1940, working in the labs of Paul Langevin and Charles Fabry at the Sorbonne, with a brief interruption in 1935/36, when he first made aliyah with his wife and briefly lived in Palestine (with a written recommendation letter by Einstein), and subsequently briefly worked in Teheran. In 1940, Stammreich and his wife obtained a visa for Brazil and emigrated via Casablanca. Whereas Stammreich's wife Charlotte could directly travel to Brazil without problems, Hans was briefly arrested and put in a POW camp by the French Vichy government, but was subsequently released and deported to Portugal, whence he left for Brazil. In Brazil Stammreich became professor for Physical Chemistry at the University of São Paulo, where he soon resumed his work in Raman spectroscopy. Stammreich was an excellent experimenter, amongst many other innovations in 1956 he was the first to obtain Raman spectra with a Helium lamp. A detailed list of his scientific innovations can be found in the web article by Andre Trombetta cited below.

Sources Bernhard Schrader and Andreas Otto, Hans Stammreich, Bunsen-Magazin, 2. Jahrgang, 5/2000, S. 120–122: Hans Stammreich: in André Trombetta, since 2011: „Neglected Science – Scientific Research in developing countries" http://www.neglectedscience.com/alphabetical-list/s/hans-stammreich Archived 2016-03-04 at the Wayback Machine

Worked examples

Example 1 — a first encounter with Hans Stammreich

Start with the simplest possible case. Write down what Hans Stammreich 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 Hans Stammreich 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 Hans Stammreich 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 Hans Stammreich

In research: Hans Stammreich 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 Hans Stammreich 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: Hans Stammreich is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1902 births, 1969 deaths, 20th-century chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Hans Stammreich 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 Hans Stammreich in 20 minutes

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

Frequently asked questions

What is Hans Stammreich in simple terms?

Why does Hans Stammreich 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 Hans Stammreich?

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 Hans Stammreich.