Melissa and Jam delve into the fascinating chemistry behind film photography. They reminisce about their childhood experiences with analog cameras and discuss the shift to digital cameras. Melissa, a chemist, explains the complex chemical processes involved in capturing and developing photos on film, focusing on the role of light-sensitive silver bromide. The episode also includes shout-outs to community members who spurred the topic and closes with personal stories and favorite film photos. Get ready to explore the intersection of chemistry and photography while revisiting nostalgia from the days of film cameras.

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References from this episode:

1. https://pubs-acs-org.libproxy.library.unt.edu/doi/epdf/10.1021/ed052p622?ref=article_openPDF
2. https://pubs-acs-org.libproxy.library.unt.edu/doi/10.1021/acs.jchemed.6b00400
3. https://pubs-acs-org.libproxy.library.unt.edu/doi/10.1021/ed081p694
4. https://edu.rsc.org/experiments/making-a-photographic-print-using-silver-chloride/454.article
5. https://www.acs.org/content/dam/acsorg/education/resources/highschool/chemmatters/articlesbytopic/metals%20and%20nonmetals/chemmatters-feb2006-digital-photo.pdf
6. https://www.researchgate.net/profile/Rolf-Steiger/publication/279964154_CHEMICAL_SENSITIZATION_OF_SILVER_BROMIDE/links/5a7d8b55aca272341aef2f6f/CHEMICAL-SENSITIZATION-OF-SILVER-BROMIDE.pdf
7. https://www.acs.org/education/celebrating-chemistry-editions/2024-ncw/chemistry-of-polaroids.html
8. https://cen.acs.org/articles/87/i12/Instant-Film.html
9. https://www.acs.org/education/whatischemistry/landmarks/land-instant-photography.html
10. https://pubs-acs-org.libproxy.library.unt.edu/doi/epdf/10.1021/ed051p72?ref=article_openPDF

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#027 Rebroadcast
Originally Published January 23, 2020

This week, Melissa and Jam dive into the chemistry of something that may not seem like chemistry at first: hair. Curly hair to be specific. What makes hair curl? Also what is hair in the first place? Why can hair be so radically different? Alright curly girls, curly guys, and curly folks, let's find out.

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References from this episode

1. Biochemistry, Edition 4 - Garret and Grisham
2. The Chemistry of Hair - C. S. Whewell, Ph.D., F.R.I.C., F.T.I.
3. The Science of Curls - Leidamarie Tirado-Lee
4. Bad Hair Days? Chemistry to the Rescue - Marlene M. Gutierrez

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Melissa and Jam dive into the definition and implications of organic foods. They explore what organic means according to USDA standards, dissect common misconceptions about pesticide use, and discuss whether organic produce is actually healthier. This detailed analysis includes Melissa's scientific research process and draws on trusted sources to clarify the nuanced debate around organic foods. Learn about the importance of fruit and vegetable intake, regardless of whether they are organic, and get practical tips for washing produce to minimize pesticide residue.

00:00 Introduction and Recap
00:21 Discussing Organic Foods
00:46 Podcast Setup and Personal Anecdotes
01:41 Health and Diet Insights
04:12 Research and Credibility
07:59 Understanding Organic Standards
22:34 Organic Pesticides and Misconceptions
26:11 Scientific Pettiness and Review Articles
27:41 Engaging Media and Petty Scientists
29:19 Pesticide Residues in Organic vs. Non-Organic Foods
35:14 Nutritional Content of Organic Foods
38:44 Health Impacts and Misconceptions
43:47 Practical Advice and Final Thoughts
55:12 Listener Questions and Community Support

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References from this episode:

1. https://pmc-ncbi-nlm-nih-gov.libproxy.library.unt.edu/articles/PMC5837313/
2. https://www.cancer.gov/news-events/cancer-currents-blog/2020/colorectal-cancer-rising-younger-adultshttps://
3. www.cdc.gov/nchs/fastats/leading-causes-of-death.htmhttps://
4. www.aap.org/en/patient-care/environmental-health/promoting-healthy-environments-for-children/food-safety/https://pubs.acs.org/doi/10.1021/cen-v078n011.p011
5. https://pmc-ncbi-nlm-nih-gov.libproxy.library.unt.edu/articles/PMC7019963/#notes3
6. https://pmc-ncbi-nlm-nih-gov.libproxy.library.unt.edu/articles/PMC7146625/
7. https://pmc-ncbi-nlm-nih-gov.libproxy.library.unt.edu/articles/PMC7146577/
8. https://pmc-ncbi-nlm-nih-gov.libproxy.library.unt.edu/articles/PMC3546364/
9. https://www.acpjournals.org/doi/10.7326/0003-4819-157-5-201209040-00007
10. https://www.acpjournals.org/doi/10.7326/0003-4819-158-4-201302190-00018
11. https://www.acs.org/education/chemmatters/past-issues/archive-2013-2014/genetic-organic-food.html
12. https://www.johnson.k-state.edu/programs/lawn-garden/agent-articles-fact-sheets-and-more/agent-articles/environment/organic-does-not-mean-pesticide-free.html
13. https://www-sciencedirect-com.libproxy.library.unt.edu/topics/agricultural-and-biological-sciences/pesticide-residue
14. https://pubs-acs-org.libproxy.library.unt.edu/doi/10.1021/jf103902t

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• Katrina B
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• Lyn S
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• Kristina G
• Timothy P
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