biology

Takehiko Ogawa

Takehiko Ogawa is a biology 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 Takehiko Ogawa rather than just read about it. In short: Takehiko Ogawa (小川毅彦, Ogawa Takehiko) is a Japanese urologist and developmental biologist, known for his pioneer research on in vitro spermatogenesis. He is Professor of Proteomics at Graduate School of Medical Life Science, Yokohama City University.

Key takeaways

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

Reference excerpt

Takehiko Ogawa (小川毅彦, Ogawa Takehiko) is a Japanese urologist and developmental biologist, known for his pioneer research on in vitro spermatogenesis. He is Professor of Proteomics at Graduate School of Medical Life Science, Yokohama City University.

Contribution In 2011, Ogawa and his colleagues succeeded to produce functional sperm from spermatogonial stem cells with the testis of mouse using an organ culture method, which was the first demonstration of mammalian. The result could change views about fertility and spermatogenesis and result in new diagnostics for male infertility as well as treatment and follow-up of patients with cancer. In 2014, his research group reported that a sample of frozen testicle has been used to produce live offspring in experiments on mice, and this breakthrough could have important implications for boys with cancer who become infertile due to chemotherapy treatments.

Biography Ogawa received his M.D. in 1985 and his doctorate in Pathology in 1989 from Yokohama City University. After clinical residency in Urology, he worked as an urologist at several hospitals in Yokohama and neighboring cities. Wishig to study germ cells, he served as a postdoctoral fellow under Ralph L. Brinster at University of Pennsylvania between 1995 and 1998. On returning to Japan, he became a member of the faculty of Yokohama City University.

External links Takehiko Ogawa laboratory

References

Worked examples

Example 1 — a first encounter with Takehiko Ogawa

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

In research: Takehiko Ogawa appears in biology 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 Takehiko Ogawa 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: Takehiko Ogawa is common in secondary-school and first-year university syllabi. It links to neighbouring topics Academic staff of Yokohama City University, Developmental biologists, Japanese biologists, so understanding it makes those chapters shorter.
In everyday life: Look for Takehiko Ogawa 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 Takehiko Ogawa in 20 minutes

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

Frequently asked questions

What is Takehiko Ogawa in simple terms?

Why does Takehiko Ogawa matter?

Because it connects several biology 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 Takehiko Ogawa?

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 Takehiko Ogawa.