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Jerrold Meinwald

Jerrold Meinwald 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 Jerrold Meinwald rather than just read about it. In short: Jerrold Meinwald (January 16, 1927 – April 23, 2018) was an American chemist known for his work on chemical ecology, a field he co-founded with his colleague and friend Thomas Eisner. He was a Goldwin Smith Professor Emeritus of Chemistry at Cornell University.

Jerrold Meinwald — main illustration
Jerrold Meinwald — illustration

Key takeaways

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

Reference excerpt

Jerrold Meinwald (January 16, 1927 – April 23, 2018) was an American chemist known for his work on chemical ecology, a field he co-founded with his colleague and friend Thomas Eisner. He was a Goldwin Smith Professor Emeritus of Chemistry at Cornell University. He was author or co-author of well over 400 scientific articles. His interest in chemistry was sparked by fireworks done with his friend Michael Cava when they were still in junior high school. Meinwald was also a music aficionado and studied flute with Marcel Moyse – the world's greatest flutist of his time.

Career Jerrold Meinwald was born in 1927 in New York City. He studied chemistry at the University of Chicago where he earned his Bachelor of Science degree in 1948. He then went on to Harvard University where he obtained his Ph.D. with R.B. Woodward in 1952. A DuPont Fellowship brought him to Cornell, where he has spent most of his subsequent career.

Since the early 1960s, he has worked, often in collaboration with Thomas Eisner, on chemical signalling in animals, particularly insects and arthropods; he is regarded as one of the founders of the field of chemical ecology. A particular field of interest was the ways in which insects either use chemicals synthesised by the plants that they feed on, or use those plant chemicals as substrates from which to synthesize their own. A species on which he and Eisner published several times over decades is the moth Utetheisa ornatrix, which collects pyrrolizidine alkaloids from its food source and uses them as a deterrent to predators; the male also uses them as a pheromone and passes them on in its semen to the female who uses them to make her eggs unpalatable. In analysing the constituents of plant signalling, he developed a number of retrosynthetic techniques, including the Meinwald Rearrangement where an epoxide is converted to a carbonyl in the presence of a Lewis acid; he has also performed substantial research over forty years in NMR spectroscopy. and in reactions for producing chiral derivatives in order to determine absolute configurations of chiral molecules. In 1981, Meinwald became a founding member of the World Cultural Council. He died in Ithaca on April 23, 2018, at the age of 91.

Awards He won the National Medal of Science in 2012. He was a member of the National Academy of Sciences since 1969, Fellow of the American Academy of Arts and Sciences since 1970, and member of the American Philosophical Society since 1987. Other notable honours:

Distinguished Leadership Award, American Academy of Arts and Sciences (2016) Grand Prix de la Fondation de la Maison de la Chimie, Paris, France (2006) Nakanishi Prize, American Chemical Society (2014) Roger Adams Award in Organic Chemistry, American Chemical Society (2005) Chemical Pioneer Award, American Institute of Chemists (1997) Silver Medal of the International Society of Chemical Ecology (1991) Tyler Prize for Environmental Achievement (1990) A. C. Cope Scholar Award, American Chemical Society (1989) Fellow, American Academy of Arts and Sciences (1970)

Publications Eisner, T, & Meinwald, J, Eds. (1995) Chemical Ecology: The Chemistry of Biotic Interaction. National Academy Press.

References

External links Faculty page at Cornell University A conversation with Jerrold Meinwald. Video on YouTube Plenary Lecture (2014), Annual Meeting of the International Society of Chemical Ecology. Video on YouTube

Illustrations

Jerrold Meinwald illustration
Jerrold Meinwald: Series from a study by Meinwald and Eisner investigating defensive spray in Chlaenius beetles with paper that turns dark in response to chemicals.
Series from a study by Meinwald and Eisner investigating defensive spray in Chlaenius beetles with paper that turns dark in response to chemicals.

Worked examples

Example 1 — a first encounter with Jerrold Meinwald

Start with the simplest possible case. Write down what Jerrold Meinwald 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 Jerrold Meinwald 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 Jerrold Meinwald 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 Jerrold Meinwald

In research
Jerrold Meinwald 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 Jerrold Meinwald 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
Jerrold Meinwald is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1927 births, 2018 deaths, American chemists, so understanding it makes those chapters shorter.
In everyday life
Look for Jerrold Meinwald 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 Jerrold Meinwald in 20 minutes

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

Frequently asked questions

What is Jerrold Meinwald in simple terms?

Jerrold Meinwald (January 16, 1927 – April 23, 2018) was an American chemist known for his work on chemical ecology, a field he co-founded with his colleague and friend Thomas Eisner. He was a Goldwin Smith Professor Emeritus of Chemistry at Cornell University.

Why does Jerrold Meinwald 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 Jerrold Meinwald?

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 Jerrold Meinwald.

Tags

  • 1927 births
  • 2018 deaths
  • American chemists
  • Benjamin Franklin Medal (Franklin Institute) laureates
  • Chemical ecologists
  • Cornell University faculty
  • Fellows of the American Academy of Arts and Sciences
  • Founding members of the World Cultural Council
  • Harvard University alumni
  • Members of the American Philosophical Society
  • Members of the United States National Academy of Sciences
  • National Medal of Science laureates

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