Explorez tous les épisodes du podcast Chemistry For Your Life

Why does microwaving ice cream for two five-second bursts feel different from microwaving it once for ten seconds? Can a science podcast make chemistry accessible without accidentally wrapping complicated ideas in answers that feel a little too neat—and what do seeds know about light that we don’t? Melissa and Jam tackle those questions along with protons versus neutrons, refrigerant patents, leaded gasoline, and an important conversation about unexpected ads. It’s a Q&R episode featuring chemistry off the cuff, educational soul-searching, listener corrections, and an unusually serious investigation into optimal ice cream texture.

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Timestamps

00:00 — Melissa turns the questions on Jam
00:42 — How long should you microwave ice cream?
02:09 — Why two five-second bursts differ from ten continuous seconds
06:43 — How melting and refreezing changes ice cream’s texture
08:25 — Is the podcast making chemistry too easy?
11:00 — Do analogies encourage curiosity or provide overly tidy answers?
17:51 — Jam’s perspective as the podcast’s non-chemist learner
20:15 — Why “that’s just how it is” can end scientific inquiry
25:52 — How can seeds detect light through soil?
31:37 — Yes, Melissa knows the difference between protons and neutrons
35:15 — Patents, leaded gasoline, and the refrigerant industry
37:26 — An important note about gambling ads and podcast platforms

References from the Episode:

Thanks to our monthly supporters
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Autoclave
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J0HNTR0Y
Cullyn R
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Elizabeth P
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Letila
Katrina Barnum-Huckins
Suzanne Phillips
Venus Rebholz
Jacob Taber
Brian Kimball
Kristina Gotfredsen
Timothy Parker
Steven Boyles
Chris Skupien
Chelsea B
Avishai Barnoy
Hunter Reardon

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Do atoms “want” full electron shells, do molecules “prefer” stability, and are electrons really “attacking” each other? Or could it be that while personifying molecules might be quietly teaching us the wrong ideas? Chemistry education researcher Jessie Stenlund joins Melissa and Jam to investigate anthropomorphism, analogies, scientific language, and why a satisfying explanation isn’t necessarily an accurate one. Along the way, Melissa reckons with learning that one of her strongest teaching opinions might need revisiting.

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Timestamps

00:00 — Melissa discovers she may have been teaching something wrong
00:52 — Meet chemistry education researcher Jessie Stenlund
04:17 — Why does iron rust?
08:59 — What counts as anthropomorphizing molecules?
11:09 — Why personification makes chemistry easier to learn
15:17 — When chemistry’s official language already sounds human
18:49 — How personification can confuse cause and effect
24:58 — Oversimplification, unfalsifiable claims, and chemical evidence
34:07 — When scientific shorthand replaces real understanding
36:52 — Do students think atoms and molecules are alive?
40:48 — Can satisfying explanations stop us from asking questions?
47:35 — Are electrons really “attacking” other molecules?
52:09 — How to personify chemistry more responsibly
57:00 — Finding the right balance for different learners

References from the Episode:

Thanks to our monthly supporters
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Dog Day Dan
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Autoclave
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J0HNTR0Y
Cullyn R
Erica Bee
Elizabeth P
Rachel Reina
Letila
Katrina Barnum-Huckins
Suzanne Phillips
Venus Rebholz
Jacob Taber
Brian Kimball
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Timothy Parker
Steven Boyles
Chris Skupien
Chelsea B
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Rebroadcast #068

This week we issue a correction, joining other science publications issuing the same correction. That's kind of an obvious answer to the question of "Is science always right?" So in this episode we explore that question, as well as what happens when science isn't right. And why that's NOT a bad thing.

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References from this episode

1. https://www.acs.org/content/acs/en/pressroom/reactions/videos/2019/citrus-scent-debunked.html
2. https://onlinelibrary.wiley.com/doi/full/10.1111/jfq.12226
3. Chemistry by Julia Burdge

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Can cooking pasta, rice, or bread, and then cooling it down, actually make it healthier? Could yesterday’s leftovers affect your blood sugar differently than a freshly cooked meal, or is this just another nutrition “hack” invented by the internet? Melissa and Jam investigate starch, glucose, insulin, digestion, crystallization, and the surprising chemistry that happens while your food sits in the fridge. Plus, the whole thing somehow turns into a Lord of the Rings battle involving glucose, hobbits, and ents, because of course it does.

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Timestamps

00:00 — Can cooking and cooling starch make it healthier?
03:52 — Why bread, pasta, and rice get a bad reputation
04:36 — Starch: a polymer made from glucose
07:03 — How glucose, insulin, and blood sugar work
09:25 — The internet’s cook-cool-reheat claim
12:14 — What crystallization has to do with leftovers
14:43 — How starch changes as cooked food cools
15:48 — What is resistant starch?
17:20 — Studies on reheated bread, rice, pasta, and potatoes
19:51 — Resistant starch, fiber, and your gut bacteria
21:26 — Can repeated reheating make even more resistant starch?
23:14 — Jam explains resistant starch using Lord of the Rings
30:44 — A free food hack with actual science behind it
34:49 — Melissa and Jam’s favorite starchy meals

References from the Episode:

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J0HNTR0Y
Cullyn R
Erica Bee
Elizabeth P
Rachel Reina
Letila
Katrina Barnum-Huckins
Suzanne Phillips
Venus Rebholz
Jacob Taber
Brian Kimball
Kristina Gotfredsen
Timothy Parker
Steven Boyles
Chris Skupien
Chelsea B
Avishai Barnoy
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What’s actually flowing through the “natural gas” pipes connected to your home—and did we get something wrong in our air-conditioning series? Which careers can an organic chemistry student pursue, how do topical pain-relief gels work, and what could make a successful HIV medication suddenly stop working? Melissa and Jam answer listener questions, revisit past episodes, correct the record, and stumble into a genuinely fascinating pharmaceutical mystery. Plus, could more chemistry history and chemistry-education stories be coming to the podcast?

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Timestamps

00:00 — Another round of listener chemistry questions
02:04 — Correction: methane, propane, and household natural gas
04:01 — How European AC systems handle propane safely
05:47 — Could more chemistry-education episodes be coming?
07:33 — The overlooked women and stories of chemistry
09:20 — What careers involve organic chemistry?
12:20 — A science teacher tackles the chemistry Praxis exam
13:38 — Do apples and human skin use the same protective pigment?
15:22 — Resources for learning organic chemistry
16:32 — How do topical pain-relief gels work?
19:35 — The HIV medication that suddenly stopped working
20:52 — How one crystal can transform an entire batch

References from the Episode:

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J0HNTR0Y
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Can shining a red light on your face really improve acne, wrinkles, inflammation, or wound healing, or is red light therapy just an expensive skincare scam involving a slightly alarming mask? How could ordinary visible light affect cells beneath your skin, and should you trust the products filling your social media feed? Melissa and Jam investigate photobiomodulation, mitochondria, collagen, blue light, FDA clearance, and the research behind this increasingly popular wellness trend. The answer is more scientifically interesting, and more complicated, than either of them expected.

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Timestamps

00:00 — Is red light therapy real or a scam?
03:41 — How light transfers energy to molecules
06:24 — Is red light therapy actually infrared?
08:03 — How deeply can visible light penetrate your skin?
09:34 — What red light may do inside your mitochondria
12:00 — Oxygen transport and other possible mechanisms
13:39 — Could red light trigger collagen production and healing?
16:26 — What scientists know—and still don’t understand
20:45 — Red light, blue light, inflammation, and acne
30:03 — The major problems with current red light research
33:20 — What FDA clearance does—and doesn’t—mean
35:20 — How to evaluate a red light therapy device
40:04 — So, should you buy a red light mask?
44:06 — A new series idea: Is it a scam or is it chemistry?

References from the Episode:

1. https://www.monash.edu/student-academic-success/biology/cellular-respiration
2. https://pubs.acs.org/aamick/article-abstract/17/4/5771/3631364/Merged-Red-and-NIR-Light-Sources-for?redirectedFrom=fulltext
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC5523874/
4. https://www.jaad.org/article/S0190-9622(24)00187-7/fulltext
5. https://onlinelibrary.wiley.com/doi/epdf/10.1002/lsm.22791
6. https://www.ncbi.nlm.nih.gov/books/NBK526105/
7. https://journals.physiology.org/doi/full/10.1152/japplphysiol.00524.2016
8. https://chemed.chem.purdue.edu/genchem/topicreview/bp/1biochem/blood3.html#top
9. https://www.fda.gov/media/90652/download
10. https://www.fda.gov/media/164417/download
11. https://pmc.ncbi.nlm.nih.gov/articles/PMC13085462/#fn-group2
12. https://www.youtube.com/watch?v=VJeiG8r6CyM
13. https://www.youtube.com/watch?v=knS7rmruf_I

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#007 Rebroadcast

Melissa finally explains to Jam how microwaves work after making him wait for an entire week. What the heck is going on inside microwaves? How does it do it's thing and make our food tasty? Is it magic?

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What happens when a chemist and a non-chemist make a podcast together for seven years? Which chemistry lessons stuck, which episode ideas spectacularly refused to cooperate, and does Jam still count as a layperson after all this time? Joined by returning guest Claire, Melissa and Jam celebrate the seventh anniversary of Chemistry For Your Life with listener questions, behind-the-scenes stories, friendship reflections, favorite science facts, and one very large chemistry cookie cake. Come for the chemiversary; stay for the long-running argument about reality TV.

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Timestamps

00:00 — Celebrating seven years of Chemistry For Your Life
01:01 — Special guest Claire—and a chemistry cookie cake
03:04 — Nearly two million downloads and meeting listeners in real life
06:05 — What has the podcast done that Melissa and Jam never expected?
10:34 — The biggest surprises about making a podcast
16:35 — What has changed most over the past seven years?
18:30 — How the podcast changed Melissa and Jam’s friendship
25:24 — What would their past selves think of the show today?
27:24 — Episodes and guest collaborations that never panned out
35:02 — How has Jam used seven years of chemistry in everyday life?
39:09 — Is Jam still a chemistry layperson?
47:40 — Which chemistry concepts are hardest for Jam to understand?
52:12 — Their favorite things they’ve learned from the podcast
01:04:06 — Where do they hope to take the show next?

References from the Episode:

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What exactly is a swamp cooler, and why can it beat the heat in Arizona but leave you sweaty and betrayed in Houston? How can an air conditioner run on water, what does humidity have to do with its effectiveness, and could an icy new invention help prevent overloaded power grids? In the final installment of our air-conditioning series, Melissa and Jam explore evaporative cooling, ancient climate-control tricks, and some promising innovations for a hotter world. It turns out “It’s not the heat, it’s the humidity” is more scientifically accurate, and more annoying, than we’d like.

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Timestamps

00:00 — The happier finale to our air-conditioning trilogy
00:37 — What exactly is a swamp cooler?
02:34 — How water can be used as a refrigerant
04:16 — The benefits and drawbacks of evaporative cooling
06:26 — Why air can only hold so much water
08:08 — How much can a swamp cooler lower the temperature?
08:56 — Why swamp coolers only work in certain climates
09:47 — Are refrigerants basically reusable sweat?
12:55 — Jam explains the complete swamp-cooler process
15:45 — Ancient evaporative cooling technology
17:19 — Could swamp coolers affect indoor air quality?
18:40 — An ice-slurry air conditioner designed to relieve the power grid
25:06 — Could underground temperatures heat and cool our homes?

References from the Episode:

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J0HNTR0Y
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Letila
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Suzanne Phillips
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Could a cheaper, more environmentally friendly refrigerant already exist, and could corporate lobbying be helping keep it out of American air conditioners? Why did the chemicals once hailed as safe alternatives become environmental villains, and are their replacements actually much better? Melissa and Jam follow the twisty history of Freon, ozone depletion, greenhouse gases, propane, and air-conditioning regulations to find out why choosing a refrigerant is never as simple as “this one works.” Grab your red string and conspiracy board, because the chemistry drama is heating up.

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Timestamps

00:00 — The chemistry and drama hiding inside refrigerants
02:31 — Is propane an ideal refrigerant?
05:37 — How an AC episode became an eight-hour research rabbit hole
09:57 — What makes a good—and safe—refrigerant?
11:19 — The hazardous chemicals used in early refrigeration
12:08 — The invention of Freon and chlorofluorocarbons
13:18 — How CFCs damage the ozone layer
16:40 — The Montreal Protocol and the next generation of refrigerants
18:08 — Solving ozone depletion while worsening global warming
22:24 — Why isn’t propane widely used in American air conditioners?
25:35 — How US refrigerant regulations differ from international standards
29:02 — The document requesting government protection for synthetic refrigerants
40:42 — What conspiracy theories might actually be true?
50:00 — Coming next: the surprisingly cool science of swamp coolers

References from the Episode:

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What happens when a chemist ventures onto Reddit to answer the internet’s most pressing science questions? Why does carbon get its own entire branch of chemistry, what makes fireworks burn different colors, and can an invention work even when its inventor has no idea why? Melissa and Jam tackle those mysteries, plus laboratory disasters, stress recovery, wireless charging, and one surprisingly complicated “Am I the Jerk?” dilemma. It’s chemistry support for the internet, because Reddit clearly has plenty of need for it.

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Timestamps

00:00 — Chemistry Support: answering Reddit’s science questions
01:30 — A chemist’s biggest “oh shoot” laboratory moments
05:36 — Jam’s alarming muriatic acid spill story
09:28 — Can inventors discover something without knowing how it works?
11:49 — Why does wireless charging feel like magic?
16:50 — Why does carbon get its own branch of chemistry?
24:30 — Why do metals make flames different colors?
26:51 — What are some science-backed ways to recover from stress?
28:10 — Completing the body’s stress cycle
31:42 — Why rest isn’t optional—even for busy people
32:03 — “Am I the Jerk?”: A student, a failed class, and an awkward favor
36:01 — What grades really tell professors about their students

References from the Episode:

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Is your air conditioner secretly doing chemistry while you’re inside pretending summer doesn’t exist? How does it turn hot air into cool air, and why does part of the AC blow out even more heat? In this episode, Melissa and Jam crack open the mysterious black box of air conditioning to explore refrigerants, phase changes, energy transfer, and the surprisingly clever science keeping your house livable. Plus: frozen AC coils, summer survival drinks, and the beginning of Hibiscus Girl Summer.

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Timestamps

00:00 — Could we survive a Texas summer without air conditioning?
01:52 — Opening the mysterious black box that is your AC
02:50 — Traditional air conditioners vs. swamp coolers
03:33 — The two chemistry concepts behind air conditioning
04:38 — Understanding energy transfer through human collisions
05:49 — Phase changes explained using a crowded theater
10:30 — How an AC removes energy from hot air
14:20 — What happens inside the refrigerant coils
15:46 — Cooling and recycling the refrigerant
18:50 — Do refrigerators work the same way?
23:19 — Why would ice form inside a broken AC?
28:42 — Our favorite treats and drinks for surviving hot weather

References from the Episode:

1. https://www.usgs.gov/media/images/evaporative-coolers-work-best-dry-areas-us-area-a
2. https://www.youtube.com/watch?v=PT38gaGciP4
3. https://www.energy.ca.gov/publications/2024/benefits-and-challenges-using-low-gwp-a3-refrigerants-residential-air

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J0HNTR0Y
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Letila
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#044 Rebroadcast

You know what we're talking about. That spectacular fizzy geyser. This week, Melissa and Jam explore what makes diet coke and mentos go crazy together. Is it love? Is it hate? Is it chemistry? Why diet coke specifically? Or more importantly, why mentos? Let's get into it.

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References from this episode

1. Diet Coke and Mentos: What is really behind this physical reaction? - American Journal of Physics 76, 551 (2008)
2. Diet Coke and Mentos: What is really behind this physical reaction? - Tonya Coffey
3. Spurting Science: Erupting Diet Coke with Mentos - Scientific American - Science Buddies

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#135 Rebroadcast

Well guess what, Melissa is a PhD Doctor now! And you know what that means? She gets to tell us more details about the research she did to get her PhD. Listen to hear what Melissa found as she dove deep into the question "Why do people hate organic chemistry?" for the past few years.

References from this episode

1. National Research Council, (2012), Discipline-based education research: Understanding and improving learning in undergraduate science and engineering, The National Academies Press.
2. Graulich N., (2015), The tip of the iceberg in organic chemistry classes: How do students deal with the invisible? Chem. Educ. Res. Pract., 16(1), 9–21.
3. Xu X. and Lewis J. E., (2011), Refinement of a chemistry attitude measure for college students. J. Chem. Educ., 88(5), 561–568.
4. Gibbons R. E. and Raker J. R., (2019), Self-beliefs in organic chemistry: Evaluation of a reciprocal causation, cross-lagged model. J. Res. Sci. Teach., 56(5), 598–618.

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What if the biggest challenge in chemistry education isn’t helping students survive—but helping them thrive? In this final bonus episode of our BCCE Community Conversation series, Melissa talks with Dr. Leyte Winfield about creating learning environments where students feel like they belong. They discuss moving beyond “weed-out” culture, designing courses that maintain high standards while expanding opportunity, and why the future of chemistry depends on empowering talented students rather than simply filtering them out. It’s a fitting conclusion to a series all about rethinking how we teach and learn chemistry.

Important Links

• Submit a Question for Community Conversations
• bcce.divched.org/2026
• YouTube.com/@chemforyourlife
• chemforyourlife.com

• 0:00 – Introducing the final BCCE Community Conversation
• 2:40 – Meet Leyte Winfield and the vision behind “Shifting the Equilibrium”
• 4:25 – From “weed out” culture to empowering student success
• 9:30 – Success-oriented vs. deficit-oriented teaching
• 13:30 – Practical ways to help students thrive without lowering standards
• 16:00 – Open deadlines, accountability, and lessons from COVID
• 18:40 – Connecting chemistry to students’ everyday lives
• 20:00 – Why organic chemistry shouldn’t be about memorization
• 22:20 – Rethinking mentoring and preparing the next generation of chemists
• 27:40 – Wrapping up the BCCE series and looking ahead

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#028

This week, Melissa and Jam travel even further down the rabbit hole of hair chemistry. How does our hair get damaged? How do we curl, straighten, and perm our hair? What's going on there at the molecular level? Let's find out!

References from this episode

1. Biochemistry, Edition 4 - Garret and Grisham
2. Making waves: The chemistry of hair perms - Christine Herman, Chemistry & Engineering News
3. How Did the 80s Get Hair So Big? - American Chemical Society
4. The Chemistry of Hair - C. S. Whewell, Ph.D., F.R.I.C., F.T.I.
5. The Science of Curls - Leidamarie Tirado-Lee

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How do we build chemistry classrooms where more students can thrive? In this bonus BCCE Community Conversation preview, Melissa talks with Matt Mio about neurodiversity in chemistry education. They discuss why every student experiences learning differently, how understanding those differences can make us better teachers and colleagues, and why creating more accessible learning environments benefits far more people than we might expect. It’s a thoughtful conversation about curiosity, empathy, and what it means to teach the whole student.

Important Links

• Submit a Question for Community Conversations
• bcce.divched.org/2026
• YouTube.com/@chemforyourlife
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• 0:00 – Introducing the Community Conversation on neurodiversity
• 2:40 – Meet Matt Mio and why this topic matters to him
• 6:10 – What the BCCE session will explore: students and faculty
• 11:00 – Why more educators are thinking differently about neurodiversity
• 14:00 – Melissa’s ADHD journey and designing courses that help everyone
• 18:30 – Questions to bring back to your own teaching community
• 19:10 – Universal Design for Learning and meeting students where they are
• 24:00 – Why awareness is the best place to start
• 25:30 – ADHD “superpowers” and different ways of thinking
• 28:00 – Looking ahead to the Community Conversation at BCCE

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Hairspray seems simple… until you actually stop and think about it. How does it come out as a fine mist? Why doesn’t it dry up inside the can? How can it hold your hair in place without acting like glue? This week we’re unpacking the surprisingly clever chemistry behind one of the most common products in our homes—and discovering it’s far more complicated than either of us expected.

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Timestamps

• 0:00 – A question inspired by our forensics episode: what is hairspray?
• 4:40 – The three ingredients inside a can of hairspray
• 10:40 – How the propellant turns liquid into a fine aerosol spray
• 18:30 – How polymers create an invisible “hairnet”
• 29:00 – Why designing hairspray is harder than you might expect
• 36:20 – How hairspray compares to gel and mousse
• 45:50 – Fun categories: movies, cast iron, and things that turned out to be more complicated than expected

References from the Episode:

1. https://www.youtube.com/watch?v=haP-EaElL-M
2. https://www.acs.org/pressroom/presspacs/2023/november/mixing-heat-with-hair-styling-products-may-be-bad-for-your-health.html
3. https://pubs.acs.org/doi/full/10.1021/acs.est.3c05156
4. https://pubs.acs.org/doi/10.1021/bk-2013-1148.ch015

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Sara Hull
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Great teaching doesn’t happen in isolation—it happens in community. In this bonus BCCE Community Conversation preview, Melissa talks with chemistry educator Dr. Joanne Stewart about communities of practice: groups of educators who come together to share ideas, solve problems, and help one another grow. They explore why teaching is hard to improve on your own, how these communities support both faculty and students, and why meaningful change in chemistry education depends on building relationships, not just sharing resources.

Important Links

• Submit a Question for Community Conversations
• bcce.divched.org/2026
• YouTube.com/@chemforyourlife
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• 0:00 – Introducing the BCCE Community Conversation series
• 2:40 – Meet Joanne Stewart and her work in chemistry education
• 5:10 – What is a community of practice?
• 8:20 – How educators can get involved (even as a “lurker”)
• 11:50 – Sharing teaching resources and learning from one another
• 15:30 – Building a “community of communities” in chemistry
• 18:50 – What this year’s Community Conversation will explore
• 23:50 – Why lasting educational change requires strong networks
• 29:20 – BCCE events, communities to explore, and final invitations

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What happens when some listeners challenge one of our past episodes? This week we’re revisiting our silicone episodes after several listeners pointed us toward new research. Along the way we answer questions about mosquito wristbands, waterproof mascara, stubborn adhesives, and whether amino acids may have formed on the early Earth after all. It’s an Ask a Chemist episode full of updates, follow-ups, and a reminder that science is always a work in progress.

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Timestamps

• 0:00 – Revisiting our silicone episodes after new research
• 2:00 – Does silicone really leach into food, and should we be worried?
• 10:30 – What we know (and don’t know) about silicone safety
• 17:30 – Do mosquito patches and wristbands actually work?
• 23:30 – How does waterproof mascara stay waterproof?
• 27:20 – A chemistry detour: removing paint and stubborn adhesives
• 30:20 – The Miller–Urey experiment and the origin of amino acids
• 33:20 – Wrap-up + send us your chemistry questions

References from the Episode:

1. https://www.sciencedirect.com/science/article/pii/S0304389425025105
2. https://www.canada.ca/en/environment-climate-change/services/evaluating-existing-substances/assessment-siloxanes-group.html#toc19
3. https://uwaterloo.ca/earth-sciences-museum/resources/detailed-rocks-and-minerals-articles/graphite
4. https://www.semcocarbon.com/blog/a-brief-history-of-graphite
5. https://www.energy.virginia.gov/geology/Graphite.shtml
6. https://pme.uchicago.edu/news/going-green-graphite-researchers-turn-plant-waste-high-tech-material
7. https://en.wikipedia.org/wiki/Miller%E2%80%93Urey_experiment
8. https://astrobiology.nasa.gov/news/miller-urey-revisited/

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Sara Hull
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What if chemistry classes were organized around real-world problems instead of chapters in a textbook?In this bonus BCCE Community Conversation preview, Melissa talks with Vicente Talanquer about helping students think like chemists rather than simply memorize chemistry. They explore why authentic, real-world problems can transform learning, how instructors can make meaningful changes without rewriting an entire course, and why teaching chemistry is about developing a way of thinking—not just delivering content.

Important Links

• Submit a Question for Community Conversations
• bcce.divched.org/2026
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More on Chemical Thinking Curriculum: https://sites.google.com/site/chemicalthinking/

General Chemistry - CLUE textbook & activities: https://www.chemistry.msu.edu/clue/general-chemistry.aspx

Organic Chemistry OCLUE textbook & activities: https://www.chemistry.msu.edu/clue/organic-chemistry.aspx

Time Stamps

• 0:00 – Introducing the Community Conversation series
• 2:40 – Meet Vicente Talanquer and this year’s discussion topic
• 4:10 – What does “authentic phenomena” actually mean?
• 7:40 – Memorization vs. meaningful understanding
• 12:10 – The two big questions guiding the Community Conversation
• 16:25 – What an authentically engaged chemistry classroom looks like
• 21:40 – Where should instructors begin making changes?
• 24:30 – Formative vs. summative assessment
• 26:50 – Free teaching resources and curriculum examples
• 30:50 – Why Vicente is excited about this year’s BCCE conversations

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There are a lot more ways to reveal a fingerprint than the black powder you see on TV.In this second part of our forensic chemistry series with Nicki Stewart, we explore the surprising chemistry behind fingerprints. From powders and iodine vapor to super glue fumes and chemical reactions, we break down how forensic scientists reveal invisible fingerprints—and why choosing the right method depends entirely on the surface, the chemistry, and the evidence they’re trying to preserve.

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• 0:00 – What are fingerprints, really?
• 5:30 – What’s actually left behind when you touch something?
• 9:20 – The two main categories of fingerprint detection
• 14:00 – How fingerprint powder actually works
• 18:40 – Iodine fuming and why fingerprints disappear again
• 25:25 – Revealing fingerprints on sticky tape
• 29:40 – Ninhydrin and the chemistry behind purple fingerprints
• 35:05 – The surprising science of super glue fuming
• 42:20 – Why collecting fingerprints is much harder than TV makes it look
• 46:10 – Jam’s biggest takeaways from fingerprint chemistry

References from the Episode:

1. https://pubs.acs.org/doi/10.1021/ed400597u
2. https://www.sciencenews.org/article/bacteria-staining-method-has-long-been-misexplained
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC5514188/
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC5898818/
5. https://pubmed.ncbi.nlm.nih.gov/38684936/
6. https://www.youtube.com/watch?v=5Ns_N9To-Mk

Thanks to our monthly supporters
Sara Hull
Dog Day Dan
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Summer Alden
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Scott Beyer
Jessie Reder
J0HNTR0Y
Cullyn R
Erica Bee
Elizabeth P
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Letila
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Suzanne Phillips
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What does it mean to teach chemistry like a scientist? In this BCCE Community Conversation preview, Melissa talks with chemistry education researcher Ellen Yezierski about scholarly teaching: making evidence-guided decisions about how we teach and how students learn. They discuss why content knowledge alone isn’t enough, how educators can improve their teaching without becoming full-time researchers, and why some of the best chemistry teaching ideas come from asking better questions about learning.

Important Links

• bcce.divched.org/2026
• YouTube.com/@chemforyourlife
• chemforyourlife.com

Time Stamps

0:00 – Why Melissa loves BCCE and chemistry education 2:50 – Meet Ellen Yezierski and the idea of scholarly teaching 4:00 – Moving beyond intuition and using evidence to improve teaching 6:35 – What chemistry educators can learn from cognitive science and education research 8:30 – The biggest challenge: finding time to improve your teaching 11:00 – Why conferences and community matter for innovation 13:45 – Barriers to evidence-based teaching and the risk of changing what’s familiar 16:20 – Applying the same scientific scrutiny to old teaching methods 19:40 – A practical first step toward scholarly teaching 21:00 – Finding useful teaching research without getting overwhelmed 25:20 – Meet the panelists and the ideas they’ll bring to BCCE 29:10 – How the Community Conversation will work 32:35 – Why good teachers are made, not born 34:00 – Filling your teaching cup back up at BCCE

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#061

Be honest. Have you ever glued yourself with super glue? Everyone should accidentally make that mistake at least once, so you can literally feel the impressive stickiness of super glue. Well today, you can learn about the chemistry within super glue, without putting any fingers or other body parts at risk! Let's do this.

References from this episode

1. Introduction to Polymers R.J. Young and P. A. Lovell
2. http://www.chm.bris.ac.uk/motm/superglue/superglueh.htm
3. https://www.chemistryworld.com/podcasts/cyanoacrylate/6261.article
4. https://pubsapp.acs.org/cen/whatstuff/86/8624sci5.html
5. https://www.acs.org/content/dam/acsorg/education/students/highschool/chemistryclubs/March_ChemClubCal.pdf
6. https://www.acs.org/content/dam/acsorg/education/resources/highschool/chemmatters/articlesbytopic/bonding/chemmatters-dec2006-glue.pdf

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• Ciara Linville
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• Suzanne Phillips
• Nelly Silva
• Venus Rebholz
• Lyn Stubblefield
• Jacob Taber
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• Emerson Woodhall
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AI is everywhere in education right now, but is that the only technology chemistry educators should be thinking about?

In this bonus BCCE preview episode, Melissa talks with Resa Kelly about technology in chemistry education, from visualizations and videos to flipped classrooms and AI. What do we actually want students to be able to do in a technology-rich world? How should that shape our teaching? And how can educators stay curious without feeling pressured to adopt every new tool that comes along?

Important Links

• bcce.divched.org/2026
• YouTube.com/@chemforyourlife
• chemforyourlife.com

Time Stamps

• 0:00 – Introducing the Community Conversation on technology
• 1:11 – Resa Kelly’s journey into chemistry education research
• 2:20 – How visualizations and animations help students learn chemistry
• 3:31 – Why this conversation is about more than just AI
• 5:50 – Technology already shaping chemistry classrooms
• 7:20 – Staying curious even if you’re skeptical of new technology
• 9:10 – Time constraints and practical barriers for teachers
• 10:00 – Creative ways educators are using AI
• 14:15 – Teaching students to evaluate trustworthy information
• 17:13 – The central question: What should students be able to do in a technology-rich environment?
• 18:20 – Is technology helping students learn or just complete tasks?
• 19:00 – If AI gives answers, what are we really teaching?
• 24:00 – Why these conversations matter beyond BCCE
• 28:15 – Assumptions, AI, and trusting students
• 30:05 – Final thoughts and invitation to the conference conversation

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CSI makes forensic science look fast, easy, and almost magical. But how much of that is actually true?This week we’re joined by forensic chemist and graduate student Nicki Stewart to answer your questions about forensic science. We talk about crime shows, fingerprints, toxicology, illicit drugs, and what really happens inside a forensic laboratory. Plus, Nicki shares what surprised her most when she worked in a real crime lab and why forensic science is often much slower (and more complicated) than TV would have you believe.

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Time Stamps

• 0:00 – Do crime shows get forensics right?
• 1:20 – Nicki’s background in forensic chemistry and toxicology
• 6:15 – From forensic chemistry to chemistry education
• 9:10 – The “CSI Effect” and common TV misconceptions
• 12:30 – Breaking Bad, Project Hail Mary, and science accuracy in entertainment
• 14:10 – Transitioning from clinical chemistry to forensic chemistry
• 17:40 – The biggest misconceptions about forensic work
• 20:20 – Forensic chemistry vs. forensic biology
• 22:05 – How fingerprints actually form
• 26:35 – Can fingerprints be removed?
• 26:55 – How forensic labs identify illicit drugs
• 31:10 – Which shows portray science most accurately?
• 33:00 – What’s coming in our next forensic chemistry episode

Check out our website at chemforyourlife.com

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References from the Episode:

1. https://pubs.acs.org/doi/10.1021/ed400597u
2. https://www.sciencenews.org/article/bacteria-staining-method-has-long-been-misexplained
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC5514188/
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC5898818/
5. https://pubmed.ncbi.nlm.nih.gov/38684936/
6. https://www.youtube.com/watch?v=5Ns_N9To-Mk

Thanks to our monthly supporters
Sara Hull
Dog Day Dan
Bri .
Summer Alden
Amanda Raymond
Kyle McCray
Justine
Ash
Vince W
Julie S.
Heather Ragusa
Autoclave
Dorien VD
Scott Beyer
Jessie Reder
J0HNTR0Y
Cullyn R
Erica Bee
Elizabeth P
Rachel Reina
Letila
Katrina Barnum-Huckins
Suzanne Phillips
Venus Rebholz
Jacob Taber
Brian Kimball
Kristina Gotfredsen
Timothy Parker
Steven Boyles
Chris Skupien
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Avishai Barnoy
Hunter Reardon

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What happens when the world’s largest gathering of chemistry educators decides to try something new? This summer we’re partnering with the Biennial Conference on Chemical Education (BCCE) for a special series of Monday episodes. In this kickoff conversation, Melissa sits down with conference organizers to talk about the vision behind this year’s event, why community conversations are replacing traditional keynotes, and how chemistry educators are thinking about the future of teaching and learning. Whether you’re attending BCCE or just curious about how people learn chemistry, this episode offers a behind-the-scenes look at one of the biggest conversations happening in chemistry education today.

Important Links

• bcce.divched.org/2026
• YouTube.com/@chemforyourlife
• chemforyourlife.com

Time Stamps

0:00 – Introducing our BCCE summer series 2:00 – Why Melissa loves BCCE 4:50 – Meet Ariel Vaughn and Ginger Schultz 7:00 – What are Community Conversations? 8:20 – Replacing keynote speakers with interactive discussions 9:00 – How the conversation topics were selected 13:40 – Empowering the community to shape the conference 14:40 – Previewing this year’s Community Conversation topics 16:00 – Neurodiversity, equity, and communities of practice 19:50 – Why community matters in chemistry education 25:20 – Meet BCCE General Chair Sam Pazicni 28:30 – The vision behind this year’s conference 29:00 – “Reflecting Back and Marching Forward” explained 32:30 – The six conference contexts and Community Conversations 37:20 – Who should attend BCCE? 39:00 – Tips for first-time conference attendees 41:00 – Remote attendance and recorded sessions 45:20 – Planning your schedule with the conference app 50:40 – What to wear and what to pack 57:30 – Madison food recommendations and cheese curds 1:03:50 – Special events, parking tips, and final advice 1:08:20 – Final BCCE details and registration information

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How can the same element make both pencil lead and diamonds? This week we wrap up our pencil chemistry mini-series by answering a surprisingly tricky question: how do erasers actually erase? Then we dive into one of chemistry’s coolest ideas. Graphite and diamond are both made entirely of carbon, but one is soft enough to write with and the other is the hardest natural material we know. What changed? The answer reveals something remarkable about chemistry, structure, and the hidden world of atoms.

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0:00 – Intro: diamonds, carbon, and the hardest natural material 2:25 – How erasers actually erase pencil marks 6:50 – Why erasers get old, crumbly, and less effective 9:50 – Graphite vs. diamond: same element, completely different materials 13:50 – Why diamonds are so hard (and why they sparkle) 15:30 – Allotropes: how carbon can become radically different substances 17:00 – Melissa’s carbon epiphany: appreciating chemistry in a new way 20:20 – Things we didn’t appreciate until later in life (birds, coffee, and more) 25:20 – Father’s Day advice for dads and families 31:50 – Wrap-up + your carbon questions

Check out our website at chemforyourlife.com

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References from the Episode:

1. https://teachchemistry.org/chemmatters/december-2017/the-write-stuff-the-fascinating-chemistry-of-pencils
2. write-stuff-tg.docxAmerican Chemical Societyhttps://www.acs.org › issues › December2017 › w...
3. https://www.chemistryworld.com/podcasts/carbon/3005727.article
4. https://pubmed.ncbi.nlm.nih.gov/26574371/
5. https://pubs.acs.org/doi/10.1021/jp0720791
6. https://pubs.acs.org/doi/10.1021/ja050124h
7. https://pubs.acs.org/doi/10.1021/ja060680r
8. https://www.youtube.com/watch?v=BHxn4xP8Inc
9. https://cen.acs.org/analytical-chemistry/spectroscopy/Diamonds-really-forever/99/i4
10. https://pubs.acs.org/doi/10.1021/accountsmr.4c00029
11. https://www.jstor.org/stable/1141001?casa_token=QOtOnB5kjxMAAAAA%3AlthWBJ6kp7pKmRbTKzNknDnKER3uxW0pnyVTDj0YtjbyZVhh3_rBk0GpxHSxEdVoD5m01JuJ88fsH19yNdSuLhuooGf47tbU0ysWF5jkfdT8B8aRZx39&seq=1
12. https://pubs.acs.org/doi/full/10.1021/acssuschemeng.3c07633?casa_token=3tGPvgFKulUAAAAA%3A1hjgy-G15xTZBEdh3TMxFcZmP1on5uBA7HFHU4CLKrk_CLbEtlsyUULMQt0_uUvX1pR_X5N0AYef8NHH
13. https://www.researchgate.net/publication/297251628_An_Eco-Approach_to_Boost_the_Sustainability_of_Carbon_Nanotube-Based_Composite_Products
14. https://goldbook.iupac.org/terms/view/A00243

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#158 Rebroadcast

Gemstones come in all sorts of colors, but how do they get them? Are different stones super different at the molecular level? How do these different colors happen naturally? And how can those colors be replicated in lab-made gemstones? Let's get into it.

References from this episode

1. https://www.acs.org/education/students/highschool/chemistryclubs/activities/jewelry-science.html

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Why does a pencil work so perfectly? Why does graphite leave marks on paper instead of just crumbling apart? And what do pancakes, honeycombs, geckos, and intermolecular forces have to do with any of it? This week we follow a simple pencil all the way down to carbon atoms, graphene sheets, and the weirdly satisfying chemistry that makes writing possible. Plus: final exam horror stories, missed alarms, and why reading the syllabus might save your GPA.

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Timestamps

0:00 – The strangely satisfying feeling of fresh pencils 1:03 – So… how do pencils actually work? 2:07 – A “polymer eraser” sparks this whole episode 3:10 – Are pencils disappearing for Gen Alpha? 4:35 – Graphite, graphene, and carbon structures 6:20 – What graphene actually looks like 7:10 – Carbon bonding and tetrahedral shapes 8:10 – Double bonds and flat molecular structures 9:40 – Electron highways and conductivity 10:20 – Melissa’s graphene model demonstration 13:10 – Why graphene could replace silicon chips 13:30 – Carbon nanotubes explained 14:40 – What holds graphite layers together? 15:00 – Intermolecular forces return 17:10 – Quick refresher on intermolecular forces 18:50 – London dispersion forces and temporary dipoles 19:30 – Why graphite is brittle 20:00 – How pencils leave marks on paper 21:20 – Why graphite is basically perfectly designed for writing 22:00 – A detour into paper, parchment, and writing history 24:00 – Pencil hardness and clay mixtures 26:30 – Jam attempts a chemistry-heavy recap 33:20 – Cliffhanger: how erasers work 34:00 – Final exam disaster stories 36:50 – Oversleeping a college final 39:10 – Melissa’s sprint across campus in pajamas 41:00 – Read the syllabus. Seriously. 43:10 – Teasing next episode: erasers and other forms of carbon

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References from the Episode:

1. https://teachchemistry.org/chemmatters/december-2017/the-write-stuff-the-fascinating-chemistry-of-pencils
2. write-stuff-tg.docxAmerican Chemical Societyhttps://www.acs.org › issues › December2017 › w...
3. https://www.chemistryworld.com/podcasts/carbon/3005727.article
4. https://pubmed.ncbi.nlm.nih.gov/26574371/
5. https://pubs.acs.org/doi/10.1021/jp0720791
6. https://pubs.acs.org/doi/10.1021/ja050124h
7. https://pubs.acs.org/doi/10.1021/ja060680r
8. https://www.youtube.com/watch?v=BHxn4xP8Inc
9. https://cen.acs.org/analytical-chemistry/spectroscopy/Diamonds-really-forever/99/i4
10. https://pubs.acs.org/doi/10.1021/accountsmr.4c00029
11. https://www.jstor.org/stable/1141001?casa_token=QOtOnB5kjxMAAAAA%3AlthWBJ6kp7pKmRbTKzNknDnKER3uxW0pnyVTDj0YtjbyZVhh3_rBk0GpxHSxEdVoD5m01JuJ88fsH19yNdSuLhuooGf47tbU0ysWF5jkfdT8B8aRZx39&seq=1
12. https://pubs.acs.org/doi/full/10.1021/acssuschemeng.3c07633?casa_token=3tGPvgFKulUAAAAA%3A1hjgy-G15xTZBEdh3TMxFcZmP1on5uBA7HFHU4CLKrk_CLbEtlsyUULMQt0_uUvX1pR_X5N0AYef8NHH
13. https://www.researchgate.net/publication/297251628_An_Eco-Approach_to_Boost_the_Sustainability_of_Carbon_Nanotube-Based_Composite_Products
14. https://goldbook.iupac.org/terms/view/A00243

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What happens when you mix bleach and ammonia? Why does perfume smell amazing on one person and weird on another? And why is getting a job so hard right now? This week we’re answering a huge batch of listener questions about chemistry, sunscreen, scents, books, careers, birds, and somehow even British accents. Plus, we accidentally brainstorm several new podcast ideas along the way.

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Timestamps

0:00 – Listener question extravaganza begins
1:00 – What ingredients should NEVER be mixed together?
1:30 – Bleach + ammonia and dangerous chloramine gas
2:40 – Food combinations that actually are bad
3:30 – How SPF and sunscreen work
5:00 – Why perfumes smell different on different people
6:30 – Body chemistry, temperature, and scent longevity
8:00 – “Why is it so hard to get a job?”
9:00 – Post-graduation job hunting advice
10:15 – Treating job searching like a full-time job
11:00 – Using chemistry skills in unexpected careers
12:00 – Certifications, courses, and standing out
14:15 – Book recommendations from listeners and hosts
15:50 – Narnia, Lord of the Rings, and classic books
17:00 – “Phoebe Reads a Mystery” and audiobook-style podcasts
18:20 – Human similarities to elements and chemical bonding
19:45 – Why chemistry analogies help us learn
22:00 – Are American accents annoying to British listeners?
23:45 – Melissa considers starting a reading podcast
25:00 – Listener suggestion: chemistry changes that impacted real life
25:45 – Podcast-inspired life changes: sunscreen and Teflon
27:00 – Shoutouts to listeners, friends, and good coffee
29:20 – The missing bird fact mystery
30:20 – “Please don’t stop uploading”
31:00 – Reflecting on nearly 7 years of the podcast
31:45 – Patreon, merch, and intermolecular forces merch talk
33:45 – Chemmunity thank-yous and outro

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References from the Episode:

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How do you turn a weird cloudy liquid into something stronger than steel? This week we’re telling the story of Kevlar: the chemistry breakthrough that led to bulletproof vests, firefighter gear, reinforced tires, and so much more. Along the way we talk polymers, hydrogen bonding, accidental discoveries, and the chemist who almost went to medical school instead.

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Timestamps

0:00 – Story time setup: bulletproof gear and the chemistry behind it
1:30 – Meet Stephanie Kwolek, the chemist behind Kevlar
4:00 – DuPont, polymers, and the early days of synthetic fibers
6:30 – Why Stephanie stayed in chemistry instead of medical school
8:30 – The gas shortage problem that sparked the search for Kevlar
9:50 – What polymers actually are
10:20 – Benzene rings, resonance, and rigid molecular structures
11:30 – The strange watery solution that almost got ignored
13:30 – The accidental breakthrough that created Kevlar fibers
14:20 – Why Kevlar is so unusually strong
16:30 – Hydrogen bonding and “molecular Velcro”
18:40 – How Kevlar chains organize into massive strong sheets
21:30 – Why Kevlar behaves almost like a metal
24:00 – Stronger than steel, lighter than steel
26:30 – Melissa’s theory about the mysterious cloudy solution
27:00 – How Kevlar became bulletproof vests
28:00 – Why “detours” in life aren’t always failures
32:30 – Other surprising uses for Kevlar
35:00 – “Mistakes” that turned into good things (personal stories)
44:00 – Wrap-up + chemistry storytime appreciation

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References from the Episode:

1. https://www.chm.bris.ac.uk/motm/kevlar/kevlarh.htm
2. https://www.chemedx.org/blog/how-chemistry-helped-batman-kevlar-short-review
3. https://www.scientificamerican.com/article/what-makes-kevlar-so-stro/
4. https://www.chemistryworld.com/podcasts/kevlar/3005828.article
5. https://www.sciencehistory.org/education/scientific-biographies/stephanie-l-kwolek/
6. https://www.compoundchem.com/2014/06/22/kevlar/
7. https://www.chemistryworld.com/podcasts/kevlar/3005828.article
8. https://www.youtube.com/watch?v=L1pepaAdkWA
9. https://www.sciencehistory.org/education/scientific-biographies/stephanie-l-kwolek/
10. https://www.smithsonianmag.com/innovation/you-can-thank-chemist-stephanie-kwolek-bulletproof-vests-and-yoga-pants-180972948/
11. https://digital.sciencehistory.org/works/vh53ww75r
12. https://www.scientificamerican.com/article/what-makes-kevlar-so-stro/

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#038 Rebroadcast

Helium is all fun and games right? High voice, super funny, no worries right? Or is there a serious shortage of helium? This week, Melissa and Jam answer this question.

References from this episode

1. Helium: Its Discovery and Applications – Locker
2. We Discovered Helium 150 Years Ago. Are We Running Out? - Greshko
3. Introductory Physics I - Brown
4. Helium beer: prank or possible? - American Chemical Society
5. Organic Chemistry, Edition 11 - Solomon

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#236

When a retired chemist wrote in… we had to explore to his great questions. How does reverse osmosis actually work? Should you put aluminum foil in your dishwasher? Why do mixed powders mysteriously un-mix themselves? This episode is full of clever questions, surprising chemistry, and very strong contributions from listener Vince!

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Timestamps

0:00 – Intro + listener Vince brings the chemistry 1:30 – Reverse osmosis: what it is and why it works 2:00 – Osmosis explained simply 3:35 – Reverse osmosis vs normal filtration 4:20 – What reverse osmosis removes (PFAS, salt, contaminants) 5:00 – Why “pure” water can create new problems 6:10 – Why some companies re-mineralize water 8:10 – Water kiosks, PFAS, and an unexpected lead problem 10:40 – Why reverse osmosis creates so much wastewater 11:40 – Should you put aluminum foil in your dishwasher? 13:00 – Why dishwashers are secretly chemical reactors 16:00 – Melissa’s theories on what the foil might be doing 17:00 – Aluminum, silver tarnish, and stainless steel 21:10 – Sacrificial metals: aluminum protecting steel 24:20 – Dishwasher complaints + real life testing plans 26:20 – Why powders and solids can “un-mix” themselves 27:45 – The Brazil Nut Effect explained 29:20 – Why mixed particle sizes matter 30:40 – Instant coffee jars, Raisin Bran, and product design 31:30 – Mark Rober, floating in sand, and weird physics/chemistry crossover 33:40 – Bird tangent: woodcocks stomping for worms 35:15 – Wrap-up + thanks to Vince and the Chemmunity

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References from the Episode:

1. https://www.acs.org/pressroom/presspacs/2026/february/elevated-lead-levels-could-flow-from-some-us-drinking-water-kiosks.html
2. https://www.epa.gov/watersense/point-use-reverse-osmosis-systems
3. https://pubs.acs.org/doi/10.1021/acs.est.9b01755
4. https://pubs.acs.org/doi/10.1021/es60115a011
5. https://www.tasteofhome.com/article/aluminum-foil-in-dishwasher/
6. https://www.nature.com/articles/s41598-021-87280-1
7. https://www.sciencedirect.com/science/article/pii/S0032591010004547
8. https://www.scientificamerican.com/article/why-does-shaking-a-can-of/
9. https://www.sciencedirect.com/science/article/pii/
10. S2666330923000250#:~:text=Introduction,corrosion%20in%20an%20aqueous%20environment.
11. https://pubs.acs.org/doi/full/10.1021/acsami.3c08922
12. https://chem.libretexts.org/Courses/University_of_British_Columbia/CHEM_100%3A_Foundations_of_Chemistry/14%3A_Acids_and_Bases/14.05%3A_Reactions_of_Acids_and_Bases
13. https://www.compoundchem.com/2018/05/23/dishwashers/

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Question and Response #76

You asked… so we answered. What do carbon chains have to do with Greek words? How do MRIs make “3D pixels”? Is that pool smell actually chlorine? And wait… are birds blue, or is that just a trick of the light? This episode is a rapid-fire round of your questions, and the chemistry behind them.

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Timestamps

0:00 – Intro + “Ask a Chemist” episode setup
1:20 – Listener shoutout + why we love your questions
2:20 – Why a 20-carbon chain is called “icosane” (Greek roots)
6:00 – MRI “3D pixels” explained (and the Minecraft analogy)
9:20 – What is a particle accelerator actually doing?
12:40 – Can we really taste CO₂? (and Pop Rocks teaser)
13:40 – Why birds look blue (without blue pigment)
16:20 – “Isn’t this physics?” + bird stories from listeners
21:30 – Pool chemistry questions: chlorine, salt, and safety
22:20 – What that “pool smell” actually is
23:30 – Why pool chemistry feels different from “real” chemistry
27:00 – Stabilized chlorine + lingering pool mysteries
28:50 – Wrap-up + how to send in your questions

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References from the Episode:

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#235

You’ve seen it a hundred times… but how does it actually work? Why do diapers change color when they’re wet? What kind of chemistry is happening in there? And how does something as simple as pee trigger such a dramatic color shift? Let’s talk acids, bases, color, and one surprisingly deep piece of everyday science.

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0:00 – Intro + diapers, parenting, and the big question
1:00 – Melissa’s nose update + community shoutouts
4:00 – Where this question came from (real-life inspiration)
5:30 – The two chemistry ideas: acids/bases + color
6:00 – What’s inside a diaper (polymers + absorption)
7:30 – The indicator strip: where the chemistry happens
8:30 – Acid-base reactions explained (with a breakup analogy)
11:30 – What happens after the “breakup” (conjugates + stability)
13:00 – Conjugation + the “electron highway”
18:30 – How this leads to color change
21:30 – What is an indicator? (and how this compares to cabbage juice)
23:30 – Why this reaction is so dramatic visually
24:50 – Jam explains it back (and works through the concepts)
30:00 – Clarifying acids vs bases (and common confusion)
33:00 – Building the full picture step-by-step
38:30 – Color, light, and energy (why we see yellow → blue)
44:50 – Wrap-up + why this matters in everyday life

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References from the Episode:

1. https://www.compoundchem.com/2020/01/14/nappies/
2. https://cdn.caymanchem.com/cdn/msds/14331m.pdf
3. https://patentimages.storage.googleapis.com/6b/15/02/33ce9b69d48e00/US4231370.pdf
4. https://www.nature.com/articles/s41598-025-28171-7
5. https://link.springer.com/article/10.1007/s40828-016-0026-4?utm_source=researchgate.net&utm_medium=article
6. https://pubs.acs.org/doi/pdf/10.1021/acs.jpca.6b07660?ref=article_openPDF
7. https://cdn.caymanchem.com/cdn/msds/14331m.pdf

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#042 Rebroadcast

What's that smell? Is it us? Is it you? We hope it's neither, thanks to deodorants and antiperspirants. This week, Melissa and Jam delve into the chemistry of this everyday important substance. What are the differences between deodorant and antiperspirant? How do they work in the first place? Does one work better? Is one better for us? Be kind to one another, wear deodorant.

References from this episode

1. Individual and gender fingerprints in human body odour – Dustin J Penn, Elisabeth Oberzaucher, Karl Grammer, Gottfried Fischer, Helena A Soini, Donald Wiesler, Milos V Novotny, Sarah J Dixon, Yun Xu, and Richard G Brereton
2. What are deodorants and antiperspirants, and how do they fight sweat? - Everts, Chemical and Engineering News
3. Studies of trans 3 methyl 2 hexenoic acid in normal and schizophrenic humans - S. G. Gordon, K. Smith, L. Rabinowitz, P. R. Vagelos, Journal of lipid research
4. Breast Cancer and Deodorants/Antiperspirants: A Systematic Review
5. Aluminium, antiperspirants and breast cancer
6. The mechanism of eccrine sweat pore plugging by aluminium salts using microfluidics combined with small angle X-ray scattering. - Bretagne A, Cotot F, Arnaud-Roux M, Sztucki M, Cabane B, Galey JB.

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References from the Episode:

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• Jacob Taber
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• Avishai Barnoy
• Hunter Reardon

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Birds… but chemistry.
What does compost have to do with eggs? How are birds basically doing chemistry experiments to make their colors? Why would a bird eat dirt… or rub ants all over itself?? This episode is a grab bag of wild, fascinating bird facts that connect back to chemistry you already know. No quiz, just vibes.

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00:00 Bird Chemistry Vibes
02:02 Compost Egg Incubators
02:58 Feather Colors Chemistry
06:20 Seeing Ultraviolet Light
08:11 Clay Eating Detox Trick
09:28 Hot Bodies Fast Reactions
14:23 Preening Oil Waterproofing
16:15 Rainy Day Birdwatching
16:44 Anting Bird Hygiene
19:17 Seabird Feather Sunscreen
20:14 More Bird Chemistry Ahead
20:41 Bird Phobia Banter
21:19 Documentary Media Swap
22:22 Mississippi Kite Swoops
28:19 Do Birds Recognize Faces
31:12 Photo IDs and Backyard Hawks
32:34 Chicken Show Family Lore
33:00 Wrap Up and Support

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References from the Episode:

1. Ornithology by Gill & Prum
2. https://experts.umn.edu/en/publications/more-than-eating-dirt-a-review-of-avian-geophagy/

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#053 Rebroadcast

This week, Melissa and Jam revisit one of their fav episodes on the topic of mosquitos. What is DEET? What part does it play in repelling mosquitos? How do repellants repel mosquitos in the first place? Is it just straight witchcraft? Let's do it.

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References from this episode

1. Staph Retreat - Radiolab - WYNC
2. https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/rachel-carson-silent-spring.html
3. https://www3.epa.gov/pesticides/chem_search/reg_actions/reregistration/fs_PC-080301_1-Apr-98.pdf
4. https://www.scientificamerican.com/article/is-it-true-that-the-deet/
5. https://pubmed.ncbi.nlm.nih.gov/24892824/
6. https://pubmed.ncbi.nlm.nih.gov/11693870/
7. https://pubmed.ncbi.nlm.nih.gov/26827259/
8. https://www.cell.com/current-biology/fulltext/S0960-9822(19)31167-4?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982219311674%3Fshowall%3Dtrue
9. https://www.cell.com/current-biology/fulltext/S0960-9822(19)31167-4?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982219311674%3Fshowall%3Dtrue
10. https://cen.acs.org/biological-chemistry/biochemistry/does-DEET-fend-off-malaria/97/web/2019/10

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Birds fly all the time. We see it constantly. But how does it actually work? Is it just "Bernoulli’s" principle? Is the air pushing up? Are the wings pushing down? And what’s happening at the molecular level when a bird takes off? Let’s talk about feathers, airflow, collisions between air molecules, and why the way flight is usually explained might not actually be the whole story.

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Timestamps:

• 00:00 — The Question Have you ever actually wondered how birds fly? A kid’s question sparks the episode.
• 01:00 — “Isn’t this physics?” Why a chemistry podcast is talking about aerodynamics.
• 02:00 — A disclaimer about flight explanations Melissa explains why common explanations of bird flight can be misleading.
• 04:00 — The weird analogy that starts it all What does oobleck (cornstarch and water) have to do with bird wings?
• 06:00 — Air isn’t nothing Thinking about air as billions of tiny molecules interacting with wings.
• 09:00 — The classic explanation of lift Bernoulli’s principle and why it’s often used to explain flight.
• 13:00 — Why that explanation isn’t the whole story What’s missing from the “air moves faster over the top” idea.
• 18:00 — Collisions at the molecular level What air molecules are actually doing when a wing moves through them.
• 22:00 — Pushing air downward Why deflecting air matters for creating lift.
• 26:00 — Wing shape and angle How airfoil shape and angle of attack change the behavior of airflow.
• 30:00 — Flapping vs gliding Why bird flight isn’t the same as airplane flight.
• 34:00 — Turbulence and airflow patterns What’s happening behind the wing as the bird moves through the air.
• 37:00 — Bringing chemistry into the picture How thinking about molecular motion helps make sense of the physics.
• 39:00 — Final recap So… what actually keeps birds in the air?

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References from the Episode:

1. Understanding Flight by David F. Anderson & Scott Eberhardt
2. https://imagine.gsfc.nasa.gov/features/yba/CygX1_mass/gravity/circular_motion.html
3. https://doi.org/10.1088/0031-9120/38/6/001
4. Ornithology by Gill & Prum

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In this bonus episode, we host a rematch of our game “Fun Fact or Fake Factoid” with Claire and Jam, using stricter rules: each claim must be entirely true or false as worded, and the winner earns a treat. We test statements about pregnancy-related brain changes, koala fingerprints, bird body temperature, whether every fig contains a dead wasp, how egg markings form, woodpecker tongues wrapping around their skulls, unique parrot pigments, bald eagles’ ability to take off from the ground, black bear maternal instinct, and whether red bird color is structural rather than pigment-based.

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00:00 Rematch Setup
00:42 Rules and Stakes
02:46 Pregnancy Brain Changes
05:55 Koala Fingerprints
07:48 Bird Body Temperature Myth
11:26 Fig Wasp Debate
15:33 Egg Markings Explained
16:53 Egg Pigment Mystery
17:57 Woodpecker Tongue Wrap
19:13 Tie Breaker Rules
20:26 Parrot Pigment Class
21:18 Eagle Takeoff Myth
24:27 Bear Instinct Debate
25:19 Bird Color Science
29:54 Rematch And Submissions
31:21 Support And Credits

References from the Episode:

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• Jeannette Napoleon
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• Erica Bee
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• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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MRIs are loud. They’re huge. They’re magnetic. But what are they actually doing? This week, we bring Claire back to help us connect the dots between NMR (yes, organic chem flashbacks) and MRI. How does a technique built on tiny hydrogen protons turn into a 3D image of your brain? How can it tell the difference between tissue and fluid? Why can’t you bring metal anywhere near the machine?

We ask:
• What are your protons doing inside an MRI?
• How does “magnetic resonance” become an image?
• Why does oxygenated blood matter?
• And how did anyone figure this out in the first place?

If you’ve ever had an MRI, or just wondered how we can see inside the body without radiation or surgery, this episode pulls back the curtain.

Listen in and rethink what’s happening inside that giant magnet.

00:00 MRI Episode Kickoff
01:11 Meet Claire Again
02:27 PhD Candidate Explained
03:44 NMR Basics Begin
04:33 Protons And Magnets
06:46 RF Pulse And Signal
11:16 Hydrogen Everywhere
13:35 Reading NMR Peaks
16:02 Matrix And Practice
18:31 Jam Summarizes NMR
20:44 Why MRI Not NMR
22:45 Spin And Isotopes
29:02 MRI Uses Body Water
30:37 Tissue Contrast And T1
33:38 Resolution Limits
34:25 MRI Resolution Limits
35:34 From NMR to Images
36:50 K Space and Gradients
41:30 Voxels and 3D Views
44:05 Contrast and Clinical Uses
49:47 Research Possibilities
51:11 Functional MRI Explained
56:14 MRI Safety and Magnet Strength
58:00 Helium and Heavy Machines
01:02:43 Science Boundaries and Wrap Up

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References from the Episode:

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• Amanda Raymond
• Emily Morrison
• Kyle McCray
• Justine
• Emily Hardy
• Ash
• Vince W
• Julie S.
• Heather Ragusa
• Autoclave
• Dorien VD
• Scott Beyer
• Jessie Reder
• J0HNTR0Y
• Jeannette Napoleon
• Cullyn R
• Erica Bee
• Elizabeth P
• Rachel Reina
• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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#079 Rebroadcast

Glass. The more you look at it, the more clear it becomes that it holds some serious mysteries. So what really is glass? Is it a liquid? How is it different from typical solids? Does it flow and ooze over time? Is that why old windows are thicker at the bottom? Let's find out!

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References from this episode

1. https://cen.acs.org/articles/95/i47/s-glass-modern-day-researchers.html
2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7245478/
3. https://math.ucr.edu/home/baez/physics/General/Glass/glass.html
4. https://phys.org/news/2016-03-scientists-temperature-glass-liquid.html
5. https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/jace.15092
6. https://cen.acs.org/articles/93/i20/Pyrex-100.html
7. Chemistry by Julia Burdge

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#231

Why is ice so slippery? Is it because of a layer of water on top, or is it something more complex? Join us as we dive into the chemistry behind icy surfaces, inspired by a curious 5-year-old's question. You'll hear about experimental findings, the special properties of water, and even some amusing snow day memories. Perfect for anyone who's ever wondered why ice makes us slip and slide!

00:00 Experiencing Alaska in Texas
00:24 The Chemistry of Ice and Snow
01:42 Why is Ice Slippery?
03:10 Listener Questions and Ice Skating Chemistry
04:02 Debunking Ice Slipperiness Theories
11:42 Water's Unique Properties
17:43 Pressure and Melting Ice
22:30 Scientific Findings on Ice Slipperiness
24:12 Addressing Common Comments
24:31 The Science of Ice Skating
25:30 New Research on Ice
26:37 Amorphous Solids and Ice
37:09 Practical Implications of Ice Behavior
41:12 Snow Day Memories
49:14 Supporting the Show

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References from the Episode:

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• Amanda Raymond
• Emily Morrison
• Kyle McCray
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• Ash
• Vince W
• Julie S.
• Heather Ragusa
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• Dorien VD
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• Jessie Reder
• J0HNTR0Y
• Jeannette Napoleon
• Cullyn R
• Erica Bee
• Elizabeth P
• Rachel Reina
• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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Why can birds sit on electrical wires without getting shocked? What's the chemistry behind cake mix versus baking from scratch? Why do some materials create more fire than others? Melissa and Jam tackle these questions and more, drawn from curious listeners and the 'Explain Like I'm Five' subreddit, in this engaging episode of Chemistry for Your Life. Plus, find out how popular TV shows might be influencing career choices and explore the fascinating world of chemical reactions. Got a burning question? Tune in and satisfy your curiosity with Chemistry for Your Life!

00:00 Introduction and Episode Inspiration
01:25 Why Birds Don't Get Shocked on Electrical Wires
06:57 The Science Behind Cake Mixes and Baking
10:13 Why Some Materials Burn and Others Don't
12:51 Why Hot Beverages Steam Below Boiling Point
15:31 Am I the Jerk? - Discussing Career Choices
18:45 Family Ties in Medicine
19:17 Influence of TV Shows on Career Choices
20:18 Realizations About Medical Careers
22:09 Exploring Alternative Medical Careers
23:46 Advice for Aspiring Medical Professionals
26:05 Considering the Medical Field Despite Challenges
36:02 Celebrating Academic Achievements
38:00 Conclusion and Listener Engagement

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References from the Episode:

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• Amanda Raymond
• Emily Morrison
• Kyle McCray
• Justine
• Emily Hardy
• Ash
• Vince W
• Julie S.
• Heather Ragusa
• Autoclave
• Dorien VD
• Scott Beyer
• Jessie Reder
• J0HNTR0Y
• Jeannette Napoleon
• Cullyn R
• Erica Bee
• Elizabeth P
• Rachel Reina
• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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#230

Winter has us longing for warmer weather. BUT when it's a hot day how do fans keep us cool? Do fans actually lower the air temperature? What role does evaporative cooling play? Find out how the movement of air molecules around your body is the key to feeling cooler. Plus, discover some fascinating insights into energy distribution, the impact of fans on air conditioning, and even some fun personal anecdotes about staying cool in the Texas heat.

00:00 Introduction and Setting the Scene
00:44 The Science Behind Cooling with Fans
01:27 Egg Analogy: Understanding Heat Transfer
03:39 How Fans Actually Work
10:47 The Role of Air Conditioners
12:31 Understanding Air Cooling Mechanisms
13:11 Insights from a Power Company
13:45 The Science Behind Fans and Energy Efficiency
16:28 Evaporative Cooling and Its Benefits
17:21 Explaining the Concept Back
21:37 Personal Experiences with Cooling
24:12 Supporting the Show and Community
27:08 A Funny Camp Counselor Story

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References from the Episode:

Thanks to our monthly supporters

• Amanda Raymond
• Emily Morrison
• Kyle McCray
• Justine
• Emily Hardy
• Ash
• Vince W
• Julie S.
• Heather Ragusa
• Autoclave
• Dorien VD
• Scott Beyer
• Jessie Reder
• J0HNTR0Y
• Jeannette Napoleon
• Cullyn R
• Erica Bee
• Elizabeth P
• Rachel Reina
• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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#037 Rebroadcast

It's the lesson we've all had to learn the hard way. The pain our mouths feel when we take a treacherous swig of the post-brush poison. This week, Melissa and Jam delve into all of our childhoods to figure out the chemistry of this infamous mixture. Why does it taste so bad? Who's fault is it, the toothpaste or the orange juice? Also while we're at it, why is it called toothpaste? Nevermind, I'm not sure we'll be able to get to the bottom of that part.

References from this episode

1. Why Does Toothpaste Make Orange Juice Taste Bad? - American Chemical Society
2. Why Does Orange Juice Taste So Bad After Brushing? - South Springs Dental Group

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• Amanda Raymond
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• Emily Hardy
• Ash
• Vince W
• Julie S.
• Heather Ragusa
• Autoclave
• Dorien VD
• Scott Beyer
• Jessie Reder
• J0HNTR0Y
• Jeannette Napoleon
• Cullyn R
• Erica Bee
• Elizabeth P
• Rachel Reina
• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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#229

What makes wool an essential fabric for many people? Is lanolin truly antimicrobial, or is wool itself responsible for its famed properties? Join us as we unravel the complexities of wool and lanolin, diving into its chemical structure, historical anecdotes, and surprising anti-odor capabilities. Does wool really keep the bacteria at bay, or is there more to the story? Tune in and explore the chemistry behind this wonder fabric!

00:00 Listener's Request: The Mystery of Lanolin
01:08 Introduction to Chemistry for Your Life
04:08 The Complex Chemistry of Wool
11:33 Exploring Lanolin: Properties and Uses
19:51 Exploring Lanolin in Wool
19:59 Investigating Wool's Antimicrobial Properties
20:54 Odor Reduction in Wool
21:57 Scientific Explanations and Hypotheses
24:46 Hydrophobic Properties of Wool
26:46 Wool's Interaction with Bacteria
31:04 Complexities of Wool Processing
35:56 Conclusion and Final Thoughts

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References from the Episode:

Thanks to our monthly supporters

• Amanda Raymond
• Emily Morrison
• Kyle McCray
• Justine
• Emily Hardy
• Ash
• Vince W
• Julie S.
• Heather Ragusa
• Autoclave
• Dorien VD
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• Jessie Reder
• J0HNTR0Y
• Jeannette Napoleon
• Cullyn R
• Erica Bee
• Elizabeth P
• Rachel Reina
• Letila
• Katrina Barnum-Huckins
• Suzanne Phillips
• Venus Rebholz
• Jacob Taber
• Brian Kimball
• Kristina Gotfredsen
• Timothy Parker
• Steven Boyles
• Chris Skupien
• Chelsea B
• Avishai Barnoy
• Hunter Reardon

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Question and Response #74

Melissa and Jam dive into a series of fascinating chemistry questions submitted by listeners. They explore how food affects the absorption rate of alcohol in the blood, the science behind shelf-stable milk turning solid after opening, and why dogs' feet might smell like Fritos. The duo also answers an intriguing question about the risks of dental X-rays versus ultraviolet radiation from the sun. Additionally, they discuss a fun science experiment involving dissolving candy canes in different liquids, providing a perfect activity for kids to learn about the world of chemistry. Special thanks to the community members and listeners whose questions keep the show engaging and informative.

00:00 Introduction and Episode Overview
02:23 How Food Affects Alcohol Absorption
06:42 Shelf-Stable Protein Shakes
10:26 Why Do Dogs' Feet Smell Like Fritos?
14:49 The Risks of X-Rays
17:56 Understanding Dental X-Ray Radiation
18:39 Annual Radiation Dose and Safety
19:32 Comparing Risks: Dental Issues vs. X-Rays
20:12 Why X-Ray Technicians Use Shields
20:59 Explaining Radiation Risks to the Public
22:55 Fun Science Experiments for Kids
25:31 Explaining Polarity and Dissolution to Kids
30:47 Encouraging Scientific Curiosity in Children
34:41 Supporting the Show and Community Shoutouts

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References from the Episode:

1. https://youtu.be/30_QRAC6XOU
2. https://www.abc.ca.gov/education/licensee-education/alcohol-facts/#:~:text=Alcohol%20does%20not%20require%20digestion,Therefore%2C%20food%20slows%20intoxication.
3. https://www.epa.gov/radiation/radiation-sources-and-doses
4. https://www.epa.gov/radiation/calculate-your-radiation-dose
5. https://www.nrc.gov/about-nrc/radiation/around-us/doses-daily-lives
6. https://ehs.stanford.edu/manual/radiation-protection-guidance-hospital-staff/natural-sources-radiation#:~:text=Cosmic%20radiation%20comes%20from%20the,approximately%2028%20mrem%20per%20year.

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#077

Who's doing what to our salt? What's iodine, do we need it, why, and how do they get it in there? This week Melissa and Jam dive head first into figurative iodized salt dunes. Let's take a closer look at the chemistry of something so everyday, we hardly even think about it.

References from this episode

1. https://pubs.acs.org/doi/10.1021/es0719071
2. https://pubs-acs-org.libproxy.library.unt.edu/doi/10.1021/ed077p984#:~:text=The%20presence%20of%20iodine%20in,in%20preventing%20simple%20endemic%20goiter
3. https://pubs.acs.org/doi/pdf/10.1021/ed062p1016
4. https://www.acs.org/content/acs/en/education/resources/highschool/chemmatters/past-issues/2015-2016/february-2016/salt-facts.html
5. https://www.scientificamerican.com/article/strange-but-true-drinking-too-much-water-can-kill/

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