Life Sciences | Open Access Articles | Digital Commons Network™

Molecular Fossils From Phytoplankton Reveal Secular Pco2 Trend Over The Phanerozoic, Caitlyn R. Witkowski, Johan W. H. Weijers, Brian S. Blais, Stefan Schouten, Jaap S. Sinninghe Damsté

Science and Technology Department Faculty Journal Articles

Past changes in the atmospheric concentration of carbon dioxide (PCO2) have had a major impact on earth system dynamics; yet, reconstructing secular trends of past PCO2 remains a prevalent challenge in paleoclimate studies. The current long-term PCO2reconstructions rely largely on the compilation of many different proxies, often with discrepancies among proxies, particularly for periods older than 100 million years (Ma). Here, we reconstructed Phanerozoic PCO2 from a single proxy: the stable carbon isotopic fractionation associated with photosynthesis (Ɛp) that increases as PCO2 increases. This concept has been widely applied to alkenones, but here, we …

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Breaking Out From Tradition: Redesign Of Large Physiology Lecture Increases Engagement, Inclusion, And Student Outcomes, Jordyn Dickey, John Redden, Kristen Kimball

Honors Scholar Theses

The human digestive system is a diverse network of cells, tissues, and organs that is regulated by intrinsic (e.g. nervous and endocrine systems) and extrinsic factors (e.g. secretions, pH, and the microbiome). Given the volume of content and the dense physiology involved, this system is difficult for instructors to teach and equally challenging for students to understand. This is especially true in our two-semester Human Anatomy and Physiology course for pre-health students at the University of Connecticut. In the Spring 2017 semester, we developed and implemented an active learning based approach when teaching the histology and regulation of gastric secretions …

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