Published in Langmuir (ACS Publication): Enthalpic Effects of Chain Length and Unsaturation on Water Permeability Across Droplet Bilayers of Homologous Monoglycerides

Sunghee Lee, Ph.D. • January 23, 2017

Dr. Lee’s recent paper, titled “Enthalpic Effects of Chain Length and Unsaturation on Water Permeability Across Droplet Bilayers of Homologous Monoglycerides” has been published in Langmuir, a publication of the American Chemical Society.

The paper is coauthored by three undergraduates, Maria Lopez (’17 Biochemistry), Sue Ellen Evanglista (’17 Chemistry), and Melissa Morales (’16 Chemistry). In this paper, a deeper understanding of unassisted passive transport of water permeation across lipid membranes was attained by studies using a droplet interface bilayer (DIB) formed by the contact of two aqueous droplets in an immiscible solvent containing bilayer-forming surfactant. We have investigated the effect of acyl chain structure of amphiphilic monoglycerides on the osmotic permeability of water across DIB membranes composed of these monoglycerides, where the acyl chain length (C14 to C24), number of double bonds (1–4), and the position of double bond are varied systematically along the acyl chains. Both permeability values and activation energies have been extracted for water transport across a lipid bilayer formed of a homologous series of lipids, allowing us to make ready comparisons between the different lipids and potentially better elucidate the contributions that molecular motifs make to the permeation process. Congratulations to the research team!

Celebrating Excellence: A Big Congrats to the Project Symphony

By Sunghee Lee • April 17, 2025
I’m so excited to congratulate and celebrate the amazing achievements of our undergraduate research group, the Project Symphony, at this year’s Iona Scholars Day! You all worked incredibly hard, and it really showed. The presentations covered a wide range of interesting and impactful projects that not only highlight your academic skills but also your passion for learning and discovery. Each project was a great example of your creativity and dedication. What stood out the most was how engaged and enthusiastic everyone was about their research. Your energy was contagious, and it was clear you’ve really connected with your topics and learned a lot along the way. A huge shoutout to each of you for your fantastic presentations. Your hard work and passion for research really set you apart, and I’m so proud of everything you’ve accomplished. I’m confident you’ll keep doing great things and making a real impact in your fields. Once again, congrats to everyone on a successful Iona Scholars Day!

Published: Project symphony-Composing a masterpiece in a science laboratory

By Sunghee Lee • March 14, 2025
In this Backstory, Dr. Lee and her students and recent graduates reflect on the development and experiences that shaped their journey through Project Symphony and the resulting skills they’ve learned. The symphony they’ve created together is a testament to the transformative power of collaborative undergraduate research – a melody of discovery that continues to evolve and inspire. You can read the full article here: https://www.sciencedirect.com/science/article/pii/S2589004225001464

Exciting News: Our Latest Research Published in Langmuir!

By Sunghee Lee • January 29, 2025
We are thrilled to announce the publication of our collaborative research in Langmuir, the journal of the American Chemical Society. Our paper, titled “Electrophysiological Characterization of Monoolein-Fatty Acid Bilayers,” represents a significant milestone in our ongoing investigation of electrical property of model cell membranes. As an open-access article, our research is now freely available to the scientific community and the public. https://pubs.acs.org/doi/10.1021/acs.langmuir.4c03814 This publication is the culmination of a fruitful collaboration with the research team at University of Tokyo, Japan. The lead author, Caroline Scott (Class of 2025), performed the experiments along with Riley Porteus (Class of 2024, now in a PhD program at Virginia Tech), building on her invaluable experience gained during a summer research trip in Japan last year, made possible by National Science Foundation. Caroline's dedication and perseverance have finally come to fruition. We look forward to continuing our work and sharing more news in the future!
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