astronomy

Tomizo Yoshida

Tomizo Yoshida 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 Tomizo Yoshida rather than just read about it. In short: Tomizo Yoshida (吉田富三, Yoshida Tomizō; 1903–1973) was a prominent Japanese pathologist, famous for discovering the Yoshida sarcoma. In addition, he is known for demonstrating the chemical-induced hepatocarcinogenesis in rats with his mentor Takaoki Sasaki.

Key takeaways

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

Reference excerpt

Tomizo Yoshida (吉田富三, Yoshida Tomizō; 1903–1973) was a prominent Japanese pathologist, famous for discovering the Yoshida sarcoma. In addition, he is known for demonstrating the chemical-induced hepatocarcinogenesis in rats with his mentor Takaoki Sasaki. Yoshida received the Imperial Prize of the Japan Academy twice (1936 and 1953) as well as the Robert Koch Gold Medal (1963).

Contribution In the 1930s Yoshida and Sasaki showed the induction of liver cancer in rats by Ortho-Aminoazotoluene. Since that time, a large amount of data has confirmed the carcinogenic activity of Azo dyes. In 1943, Yoshida found a cancer cell line, so-called Yoshida Sarcoma, and experimentally proved that cancer is generated from cancer cells. His findings opened the way of cancer research in terms of cells, and developed biomedical research on chemotherapy.

Biography Yoshida was born in Asakawa, Fukushima and graduated from the Medical School, Imperial University of Tokyo in 1927. He was an assistant professor of pathology at the same institution from 1927 to 1929. In 1929 he moved to the Sasaki Institute to work on chemical-induced carcinogenesis with Takaoki Sasaki, before he went to Germany to study pathology in 1935. After returning to his homeland, Yoshida served as a professor of pathology at Nagasaki University from 1938 to 1944, Tohoku University from 1944 to 1952, before being appointed as a professor of pathology at the Faculty of Medicine, University of Tokyo in 1952, where he became a dean in 1958. In addition, he became a director at the Sasaki Institute in 1953 and at the Cancer Institute, Japanese Foundation for Cancer Research in 1963. Yoshida died in 1973 at the age of 70.

Recognition 1936 Imperial Prize of the Japan Academy 1952 Asahi Prize 1953 Imperial Prize of the Japan Academy 1956 Scheele Medal 1959 Order of Culture 1963 Robert Koch Gold Medal 1965 Elected Member of the Japan Academy. 1965 Elected Honorary Citizen of Asakawa 1968 Honorary Doctorate, University of Milan

Tomizo Yoshida Award

Since 1992 the Japanese Cancer Association, the town office of Asakawa, and Tomizo Yoshida Memorial Hall have annually awarded the Tomizo Yoshida Award to researchers who made outstanding achievement in the field of cancer research. At the annual award presentation held in Asakawa, Fukushima, winners receive one million yen and a diploma. Past award winners include the following:

1992 Takashi Sugimura, National Cancer Center (Japan) 1999 Mitsuaki Yoshida, BANYU Pharmaceutical Co. 2002 Yusuke Nakamura, University of Tokyo 2008 Tadatsugu Taniguchi, University of Tokyo 2012 Shigekazu Nagata, Kyoto University

Yamagiwa-Yoshida Memorial international study grants After his death, Japanese cancer researchers established the Yamagiwa-Yoshida Memorial international study grants in honor of Katsusaburō Yamagiwa and Tomizo Yoshida. Since its inception in 1975, the grants supported by the Japan National Committee, Union for International Cancer Control, have contributed to the development of the professional capacity of over 330 Fellows from over 40 countries.

External links 吉田富三記念館 Tomizo Yoshida Memorial Hall(in Japanese)

References

Illustrations

Worked examples

Example 1 — a first encounter with Tomizo Yoshida

Start with the simplest possible case. Write down what Tomizo Yoshida 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 Tomizo Yoshida 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 Tomizo Yoshida 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 Tomizo Yoshida

In research: Tomizo Yoshida 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 Tomizo Yoshida 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: Tomizo Yoshida is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1903 births, 1973 deaths, 20th-century Japanese medical doctors, so understanding it makes those chapters shorter.
In everyday life: Look for Tomizo Yoshida 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 Tomizo Yoshida in 20 minutes

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

Frequently asked questions

What is Tomizo Yoshida in simple terms?

Why does Tomizo Yoshida 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 Tomizo Yoshida?

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 Tomizo Yoshida.