astronomy

Raluca Ripan

Raluca Ripan is a astronomy 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 Raluca Ripan rather than just read about it. In short: Raluca Ripan (27 June 1894 – 5 December 1972) was a Romanian chemist, and a titular member of the Romanian Academy. She wrote many treatises, especially in the field of analytical chemistry.

Key takeaways

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

Reference excerpt

Raluca Ripan (27 June 1894 – 5 December 1972) was a Romanian chemist, and a titular member of the Romanian Academy. She wrote many treatises, especially in the field of analytical chemistry.

Biography She was born in Iași, in the Moldavia region of Romania; her parents were Constantin and Smaranda Ripan, both originally from Huși. She attended the local girl's high school, after which she enrolled in the Faculty of Science of the University of Iași, graduating in 1919. For her graduate studies she went to the University of Cluj in Transylvania, obtaining her PhD in 1922 under the direction of Gheorghe Spacu, with thesis "Double amines corresponding to double sulphates in the magnesium series". She is recognized as the first woman from Romania to earn a Ph.D. in the chemical sciences. After obtaining in 1930 her Habilitation and the title of Docent, Ripan became an associate professor of analytic chemistry at the Faculty of Science of the University of Cluj. During World War II, when Cluj passed under Hungarian administration under the terms of the Second Vienna Award, the university moved to Timișoara. In July 1942 (by which time she had 53 publications), she was promoted to full professor through a decree published in Monitorul Oficial. After the war she returned to Cluj, where she served as Dean of the Faculty of Chemistry from 1948 to 1952. In 1948, Ripan was elected titular member of the Romanian Academy, thus becoming the first woman to be inducted in that academy. In 1951 she founded the Institute of Chemistry, consisting of three sections (inorganic chemistry, organic chemistry, and physical chemistry); she headed the institute until 1970. From 1951 to 1955 she served as Rector of the University of Cluj, the first woman to hold a rectorship in Romania. In 1952 she was elected deputy to the Great National Assembly for the Cluj-Nord constituency of the Cluj Region, serving in this capacity until 1957. In 1963 she was awarded an honorary degree by the Nicolaus Copernicus University in Toruń. Ripan worked in the domain of complex combinations and their use in analytical chemistry. She discovered and studied new classes of complex combinations used in the determination of metals, as well as new methods of assay for thallium, lead, tellurium, selenic acid, and selenocyanates. One of her students at the University of Cluj was Ionel Haiduc (a future President of the Romanian Academy), who wrote an undergraduate thesis on polyoxometalates under her direction in 1959. She died in Cluj-Napoca in 1972, and is buried at the city's Hajongard Cemetery. The "Raluca Ripan Institute for Research in Chemistry" is now part of Babeș-Bolyai University. A vocational high school in Cluj-Napoca also bears her name, as does a national Chemistry competition for high school students.

Publications

Research articles

Ripan-Tilici, Raluca (1935). "Eine direkte und eine indirekte argentometrische Bestimmung von Cyanaten mit Adsorptionsindikatoren". Fresenius' Zeitschrift für analytische Chemie (in German). 102 (1–2): 32–34. doi:10.1007/BF01382058. S2CID 95159512. Ripan-Tilici, Raluca (1939). "Neue konduktometrische Bestimmung der selenigen Säure mit Silber-Ion". Fresenius' Zeitschrift für analytische Chemie (in German). 117 (1–2): 47–49. doi:10.1007/BF01393179. S2CID 95359457. Ripan, Raluca; Várhelyi, Csaba; Ürmösi, J. (1964). "Neue Kobalt(III)-dimethylglyoximin-komplexe mit Benzylamin". Zeitschrift für anorganische und allgemeine Chemie (in German). 332 (1–2): 95–102. doi:10.1002/zaac.19643320111. Ripan, Raluca; Sacelean, Viorel (1965). "Une nouvelle méthode pour le dosage gravimétrique de l'uranium". Talanta. 12 (1): 69–72. doi:10.1016/0039-9140(65)80011-X. Ripan, Raluca; Calu, Cleopatra (1967). "Étude de la formation des dodecatungstates et le dosage des iso- et hétérododeca-tungstates a l'aide du chlorure de tetraphénylphosphonium". Talanta (in French). 14 (8): 887–891. doi:10.1016/0039-9140(67)80118-8. PMID 18960179.

Textbooks Ripan, Raluca; Ceteanu, Ion (1961). Manual de lucrări practice de chimie anorganică. Vol. I: Metaloizi (in Romanian). Bucharest: Editura de Stat Didactică și Pedagogică. Ripan, Raluca; Popper, Ervin; Liteanu, Candin (1963). Chimie analitică calitativă. Semimicroanaliză (in Romanian) (Fourth ed.). Bucharest: Editura Didactică și Pedagogică. OCLC 153977046. Ripan, Raluca (1967). Chimia metalelor (vol. I) (in Romanian). Bucharest: Editura Didactică și Pedagogică. OCLC 699830779. Ripan, Raluca; Ceteanu, Ion (1969). Chimia metalelor (vol. II) (in Romanian). Bucharest: Editura Didactică și Pedagogică. OCLC 895500091.

References

Constantin Gh. Macarovici, Georgeta Munteanu: Raluca Ripan, Editura Științifică și Enciclopedică, București, 1982. Dicționar – Personalități românești ale științelor naturii și tehnicii, Editura Științifică și Enciclopedică, București, 1982.

Worked examples

Example 1 — a first encounter with Raluca Ripan

Start with the simplest possible case. Write down what Raluca Ripan claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Raluca Ripan 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 Raluca Ripan 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 Raluca Ripan

In research: Raluca Ripan appears in astronomy 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 Raluca Ripan 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: Raluca Ripan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1894 births, 1972 deaths, 20th-century women scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Raluca Ripan 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 Raluca Ripan in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Raluca Ripan 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.
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Frequently asked questions

What is Raluca Ripan in simple terms?

Raluca Ripan (27 June 1894 – 5 December 1972) was a Romanian chemist, and a titular member of the Romanian Academy. She wrote many treatises, especially in the field of analytical chemistry.

Why does Raluca Ripan matter?

Because it connects several astronomy 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 Raluca Ripan?

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 Raluca Ripan.