Ask a Chemist #66

Melissa and Jam dive into a range of listener-submitted questions exploring everyday chemistry. Topics include the chemistry behind toasting herbs, the effect of gravity on elemental bonds, the purpose and ethics of creating elements with short half-lives, and the effectiveness of cough medicine. They also discuss potential causes of mysterious holes in clothing, the debate on food dyes, and the impact of politics on scientific research funding. The hosts wrap up by addressing various listener questions and sharing some heartwarming and supportive messages from their audience.

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00:00 Introduction
01:24 Toasting Herbs: The Chemistry Behind the Flavor
03:05 Gravity's Role in Chemical Bonding
06:44 The Ethics of Creating New Elements
10:17 How Cough Medicine Works
13:06 The Debate on Food Dyes
15:57 The Yellow Cheese Phenomenon
16:35 Colorful Ceviche and Natural Foods
17:58 Chemistry Hot Takes and Listener Questions
19:03 Cleaning Lab Counters and Acid Holes
21:10 Listener Feedback and Podcast Reflections
25:33 Impact of Politics on Science Funding
29:19 Encouraging Messages from Listeners
30:40 Supporting the Podcast and Final Thanks

References from this episode:

1. https://www.rsc.org/news-events/community/2017/jan/new-elements/

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#209

Melissa and Jam dive into the fascinating chemistry behind how plants transport water from their roots to their leaves, effectively defying gravity. They explore processes such as capillary action and the cohesion tension mechanism, citing a primary source from Nature journal. Melissa and Jam also touch on key chemistry concepts like water polarity, hydrogen bonding, and osmosis, providing examples from everyday life. Jam shares a personal story about germinating an apple seed with his son, while Melissa discusses her adventures in native plant gardening. The episode concludes with a shoutout to their Patreon supporters and details on upcoming Chemistry for Your Life merch.

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00:00 Introduction and Tea Talk
00:17 Plants Defying Gravity
01:05 Welcome to Chemistry for Your Life
01:20 Listener Question: Chemistry of Pregnancy Tests
02:11 Capillary Action in Everyday Life
03:57 Personal Stories and Plant Enthusiasm
05:15 Chemistry Lessons: Water Polarity and Hydrogen Bonds
10:32 Water Transport in Plants: Xylem and Capillary Action
16:00 Transpiration and Water Loss in Plants
23:32 Curiosity About Soil and Water Content
24:23 Water Movement in Trees
26:53 Understanding Osmosis
28:37 Practical Applications of Osmosis
31:12 Capillary Action and Plant Water Transport
33:15 Fun Plant Stories and Experiments
41:11 Supporting the Show and Community

References from this episode:

1. https://www.sciencedirect.com/science/article/pii/S0890856711009531
2. https://www.gao.gov/assets/hrd-82-3.pdf
3. https://pubmed-ncbi-nlm-nih-gov.libproxy.library.unt.edu/23026007/
4. https://www.fda.gov/food/hfp-constituent-updates/fda-revoke-authorization-use-red-no-3-food-and-ingested-drugs
5. https://cen.acs.org/food/food-ingredients/FDA-bans-red3-food-drugs/103/web/2025/01
6. https://www.acs.org/education/chemmatters/past-issues/2015-2016/october-2015/articial-dyes.html
7. https://cen.acs.org/food/food-ingredients/Editorial-Fewer-risky-food-colors/102/i26
8. https://pmc.ncbi.nlm.nih.gov/articles/PMC10502305/

Thanks to our monthly supporters

• Vince W
• Julie S.
• Heather R
• Autoclave
• Chelsea M
• Dorien VD
• Scott B
• Jessie R
• Ciara L
• J0HNTR0Y
• Jeannette N
• Cullyn R
• Erica B
• Elizabeth P
• Sarah M
• Rachel R
• Letila
• Katrina B
• Suzanne P
• Venus R
• Lyn S
• Jacob T
• Brian K
• Emerson W
• Kristina G
• Timothy P
• Steven B
• Chris and Claire S
• Chelsea B
• Avishai B
• Hunter R

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#098 Rebroadcast
Original Air Date: June 3, 2021

Could histamine and antihistamines do more than just affect our allergies? Actually yes. Today we discuss new and recent research in the world of histamine, and believe us, there's some really cool stuff.

References from this episode

1. https://cen.acs.org/articles/91/web/2013/06/Tracking-Histamine-Levels-Glowing-Nanosensors.html
2. https://cen.acs.org/articles/92/web/2014/12/Chemical-Cocktail-Lures-Bedbugs-Coaxes.html
3. https://cen.acs.org/pharmaceuticals/antibiotics/Common-allergy-drug-makes-resistant/97/i24
4. https://pubs.acs.org/doi/abs/10.1021/acs.jafc.8b05515
5. https://www.acs.org/content/acs/en/molecule-of-the-week/archive/h/histamines.html
6. https://pubs.acs.org/doi/10.1021/jacs.9b03300

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