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William D. McElroy

William D. McElroy 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 William D. McElroy rather than just read about it. In short: William David McElroy (22 January 1917 – 17 February 1999) was an American biochemist and academic administrator. Biography Early years McElroy was born to William D.

William D. McElroy — main illustration
William D. McElroy — illustration

Key takeaways

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

Reference excerpt

William David McElroy (22 January 1917 – 17 February 1999) was an American biochemist and academic administrator.

Biography

Early years McElroy was born to William D. McElroy and Ora Shipley in Rogers, Texas. After graduating from McAllen High School in McAllen, Texas in 1935, he attended Pasadena Junior College in California, and went on to Stanford University on a football scholarship where he received his bachelor's degree in 1937. He earned his master's degree in biology at Reed College and his PhD at Princeton University in 1943.

Career After college, McElroy became a professor at Johns Hopkins University. He initiated an independent research program in bioluminescence, recruiting students to collect fireflies to perform experiments. He discovered the key role that luciferase and adenosine triphosphate (ATP) play in the process. He began working with the Office of Naval Research and the National Institute of Health in the 1950s, and became a member of the President's Science Advisory Committee to President John F. Kennedy in 1962. He later became the director of the National Science Foundation from 1969 to 1972. He also served as the president of the American Association for the Advancement of Science from 1975 to 1976. He became chancellor of the University of California San Diego from 1972 to 1980. In collaboration with H. Bentley Glass he edited several symposium volumes, including The chemical basis of heredity, with authors including François Jacob, Erwin Chargaff, Severo Ochoa, Arthur Kornberg, Max Delbrück and Francis Crick. In his review Conrad Waddington wrote as follows:

It deals with the most fundamental problem of analytical biology — the chemical nature and functioning of the basic units on which biological organisms are based. The contributors are ... of the very highest standard ... Workers in the large field of chromosomes, genes, nucleic acids and viruses will find the book essential. He was awarded the Howard N. Potts Medal in 1971. He was also an elected member of the American Academy of Arts and Sciences, the United States National Academy of Sciences, and the American Philosophical Society. In 1981, McElroy became a founding member of the World Cultural Council.

Personal life McElroy married three times. He was first married to Nella Amelia Winch in 1940 with whom he had four children: Ann, Mary, Thomas and William, Jr. His second marriage was in 1967 to biochemist Marlene Anderegg DeLuca. Their one child is Eric Gene. After being widowed in 1987, he married again in 1997 to Olga Robles who survived him.

Honors McElroy Ridge in the Victory Mountains of Victoria Land, Antarctica was named after McElroy by the Advisory Committee on Antarctic Names.

References

Helinski, Donald R. (March 2005). "Biographical Memoirs: William David McElroy" (PDF). Proceedings of the American Philosophical Society. 149 (1): 104–106. Retrieved 2008-11-30. Hastings, J. Woodland (2004). "William David McElroy". Biographical Memoirs. Vol. 85. National Academy of Sciences. pp. 164–183. OCLC 57734601. Retrieved 2008-11-30.

External links William D. McElroy Papers MSS 483. Special Collections & Archives, UC San Diego Library.

Worked examples

Example 1 — a first encounter with William D. McElroy

Start with the simplest possible case. Write down what William D. McElroy 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 William D. McElroy 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 William D. McElroy 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 William D. McElroy

In research
William D. McElroy 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 William D. McElroy 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
William D. McElroy is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1917 births, 1999 deaths, 20th-century American biochemists, so understanding it makes those chapters shorter.
In everyday life
Look for William D. McElroy 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 William D. McElroy in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what William D. McElroy means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain William D. McElroy out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is William D. McElroy in simple terms?

William David McElroy (22 January 1917 – 17 February 1999) was an American biochemist and academic administrator. Biography Early years McElroy was born to William D.

Why does William D. McElroy 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 William D. McElroy?

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 William D. McElroy.

Tags

  • 1917 births
  • 1999 deaths
  • 20th-century American biochemists
  • Chancellors of the University of California, San Diego
  • Directors of the National Science Foundation
  • Founding members of the World Cultural Council
  • Howard N. Potts Medal recipients
  • Johns Hopkins University faculty
  • Members of the American Philosophical Society
  • Nixon administration personnel
  • Pasadena City College alumni
  • People from Rogers, Texas

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