chemistry

József Dorner

József Dorner 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 József Dorner rather than just read about it. In short: József Dorner (2 November 1808 – 9 October 1873), was a Hungarian educator and botanist. He was born József Thurner the Younger, was born to German parents József Thurner the Elder, a merchant, and Zsuzsanna Schmidt.

Key takeaways

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

Reference excerpt

József Dorner (2 November 1808 – 9 October 1873), was a Hungarian educator and botanist. He was born József Thurner the Younger, was born to German parents József Thurner the Elder, a merchant, and Zsuzsanna Schmidt. A pharmacist by trade, he also worked as a schoolteacher and is best known today as a botanist. By 1831, or 1834, he had changed his family name to Dorner at the time of his registration as a nobleman. This spelling is also his botanical author abbreviation Dorner. According to Szmodits, he married in 1845 but they remained childless, with his wife predeceasing him.

Education, careers in pharmacy and teaching Initially, Dorner went to school in his hometown of Győr, up to lower secondary school. He completed his secondary education in Sopron, and from 1824 to 1827 he undertook further training as an apprentice at the Kochmeister-run Magyar Korona (Hungarian Crown) pharmacy in Sopron, before passing his examinations and receiving an assistantship. With this qualification, he worked as a pharmacy attendant in Pest and Bratislava. Dorner then enrolled at the University of Vienna and the Polytechnic Institute (now TU Vienna) to study pharmacy, including subjects in botany and chemistry, which he completed in 1832. From 1836 to 1840, he ran a pharmacy in Bratislava called the Arany Korona (Golden Crown), that had been purchased for him by his father. However, he sold the business soon after, and went to take a position in the health department of the Lieutenancy Council in Buda. In 1848, Baron József Eötvös, the minister of religion and public education, offered him a teaching role, which he accepted. By 1853, he had become a professor of natural history at the Lutheran lyceum in Szarvas, and from 1860 until his death, he was a professor at the Pest Evangelical upper-grammar school (Obergymnasium). He also taught at Deák Téri Evangélikus Gimnázium in Budapest. Alongside his specialty of the natural sciences, he also taught German and French.

Botanical work In the 1830s, Dorner came into contact with other botanists, and in 1835 went on a botanical expedition with János Heuffel and Anton Rochel to the Banat. After the Hungarian Revolution of 1848, he retired from government work and instead pursued botanical studies. Although Dorner intended to compose a Flora of Hungary with his botanical colleagues József Sadler and János Heuffel, the plans never came to fruition after the death of Sadler in 1849, and the retirement of Heuffel due to ill health. Instead, he wrote smaller monographic works and papers in Hungarian and foreign journals. By 1858, Dorner became a corresponding member of the Hungarian Academy of Sciences and subsequently published 167 articles in the academy's Bulletin. He was also a member of the Imperial-Royal Zoological-Botanical Society (Kaiserlich-königliche zoologisch-botanische Gesellschaft, the predecessor of the Zoological-Botanical Society in Austria). He was particularly interested in plant anatomy and plant physiology, and in turn, was a skilled microscopist. Dorner also shared his research on the development of cells with German scientists. At the same time, through these professional networks, Dorner was aware of wider innovations in science, including the theory of biological evolution developed by Charles Darwin, and the botanical research of Asa Gray. The majority of Dorner's botanical specimens were collected within the present-day territory of Hungary, but are now found in herbaria worldwide. This includes the Meise Botanic Garden herbarium, the National Museum of Natural History, France, Kew Herbarium, Universalmuseum Joanneum, and the National Herbarium of Victoria, Royal Botanic Gardens Victoria. He also named the following species:

Carex trachyantha Dorner (a synonym of Carex depressa subsp. transsilvanica). Quercus cerris var. macrophylla Dorner (a synonym of Quercus cerris).

Death and burial After a long illness Dorner passed away in October 1873, and was subsequently buried in Plot 9, Row 4, Grave 70 of the Fiume Road Graveyard in Budapest. Before 2007, his grave was marked with a timber gabled cross but it has since been replaced with a stone obelisk.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with József Dorner

Start with the simplest possible case. Write down what József Dorner 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 József Dorner 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 József Dorner 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 József Dorner

In research: József Dorner 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 József Dorner 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: József Dorner is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1808 births, 1873 deaths, 19th-century Hungarian botanists, so understanding it makes those chapters shorter.
In everyday life: Look for József Dorner 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 József Dorner in 20 minutes

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

Frequently asked questions

What is József Dorner in simple terms?

Why does József Dorner 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 József Dorner?

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 József Dorner.