science

Jan Derk Kobus

Jan Derk Kobus 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 Jan Derk Kobus rather than just read about it. In short: Jan Derk Kobus (11 March 1858 – 11 March 1910) was a Dutch agricultural chemist and botanist. He headed the sugar experimental station in Dutch Java at Pasoeroean where he was involved in early experimental hybridization of sugarcane.

Key takeaways

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

Reference excerpt

Jan Derk Kobus (11 March 1858 – 11 March 1910) was a Dutch agricultural chemist and botanist. He headed the sugar experimental station in Dutch Java at Pasoeroean where he was involved in early experimental hybridization of sugarcane.

Life and work Kobus was born in Deventer and went to the local school before studying chemistry at the Georg August University of Göttingen, the University of Halle and at the Royal Saxon Forestry Academy, Tharandt. He then worked at the Agricultural Research Station in Wageningen. He took a special interest in botany, examining the genera Carex and Cyperus. In 1886 he was appointed as deputy director for the experimental station of the sugar industry in Dutch Java at Pasoeroean. Here he was involved in studies on sugarcane diseases and in the breeding of high-yielding and disease resistant sugarcane hybrids and the selection of varieties. He edited the journal, Archief voor de Java Suikerindustrie, of the Javan sugar industry from 1893 and became directory of the experimental station in 1897. He was knighted in the order of the Orange Nassau in 1899 by the Dutch queen Wilhelmina. He was also admitted to the Leopoldina Academy in 1907. Kobus died on his birthday while aboard the steamer Goentoer while returning to the Netherlands.

References

Illustrations

Worked examples

Example 1 — a first encounter with Jan Derk Kobus

Start with the simplest possible case. Write down what Jan Derk Kobus 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 Jan Derk Kobus 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 Jan Derk Kobus 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 Jan Derk Kobus

In research: Jan Derk Kobus 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 Jan Derk Kobus 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: Jan Derk Kobus is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1858 births, 1910 deaths, 19th-century Dutch botanists, so understanding it makes those chapters shorter.
In everyday life: Look for Jan Derk Kobus 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 Jan Derk Kobus in 20 minutes

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

Frequently asked questions

What is Jan Derk Kobus in simple terms?

Why does Jan Derk Kobus 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 Jan Derk Kobus?

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 Jan Derk Kobus.