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   https://doi.org/10.1063/5.0059356  

   Smith, Daniel G. A. ; Lolinco, Annabelle T. ; Glick, Zachary L. ; Lee, Jiyoung ; Alenaizan, Asem ; Barnes, Taylor A. ; Borca, Carlos H. ; Di Remigio, Roberto ; Dotson, David L. ; Ehlert, Sebastian ; et al ( November 2021 , The Journal of Chemical Physics)
2. Chemistry Made Easy: Teaching Students about the Link Between Marine Chemistry and Coral Reef Biodiversity

   https://doi.org/10.5334/cjme.39  

   Curran, Mary Carla ; Robertson, Alison ( September 2020 , Current: The Journal of Marine Education)
3. Beavers, Bugs and Chemistry: A Mammalian Herbivore Changes Chemistry Composition and Arthropod Communities in Foundation Tree Species

   https://doi.org/10.3390/f12070877  

   Durben, Rachel M. ; Walker, Faith M. ; Holeski, Liza ; Keith, Arthur R. ; Kovacs, Zsuzsi ; Hurteau, Sarah R. ; Lindroth, Richard L. ; Shuster, Stephen M. ; Whitham, Thomas G. ( July 2021 , Forests)

   The North American beaver (Castor canadensis Kuhl) and cottonwoods (Populus spp.) are foundation species, the interactions of which define a much larger community and affect a threatened riparian habitat type. Few studies have tested the effect of these interactions on plant chemistry and a diverse arthropod community. We experimentally examined the impact of beaver foraging on riparian communities by first investigating beaver food preferences for one cottonwood species, Fremont cottonwood (P. fremontii S. Watson), compared to other locally available woody species. We next examined the impact of beaver foraging on twig chemistry and arthropod communities in paired samples of felled and unfelled cottonwood species in northern Arizona (P. fremontii) and southwestern Colorado (narrowleaf cottonwood, P. angustifolia James, and Eastern cottonwood, P. deltoides W. Bartram ex Marshall). Four major patterns emerged: (1) In a cafeteria experiment, beavers chose P. fremontii six times more often than other woody native and exotic species. (2) With two cottonwood species, we found that the nitrogen and salicortin concentrations were up to 45% greater and lignin concentration 14% lower in the juvenile resprout growth of felled trees than the juvenile growth on unfelled trees (six of seven analyses were significant for P. fremontii and four ofmore »six were significant for P. angustifolia). (3) With two cottonwood species, arthropod community composition on juvenile branches differed significantly between felled and unfelled trees, with up to 38% greater species richness, 114% greater relative abundance and 1282% greater species diversity on felled trees (six of seven analyses with P. fremontii and four of six analyses with P. angustifolia were significant). The above findings indicate that the highest arthropod diversity is achieved in the heterogenous stands of mixed felled and unfelled trees than in stands of cottonwoods, where beavers are not present. These results also indicate that beaver herbivory changes the chemical composition in 10 out of 13 chemical traits in the juvenile growth of two of the three cottonwood species to potentially allow better defense against future beaver herbivory. (4) With P. deltoides, only one of five analyses in chemistry was significant, and none of the four arthropod community analyses were significant, suggesting that this species and its arthropod community responds differently to beaver. Potential reasons for these differences are unknown. Overall, our findings suggest that in addition to their impact on riparian vegetation, other mammals, birds, and aquatic organisms, beavers also may define the arthropod communities of two of three foundation tree species in these riparian ecosystems.« less
4. Undergraduate Chemistry Students’ Conceptualization of Models in General Chemistry

   https://doi.org/10.1021/acs.jchemed.8b00813  

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5. Sensitivity of Iodine-Mediated Stratospheric Ozone Loss Chemistry to Future Chemistry-Climate Scenarios

   https://doi.org/10.3389/feart.2021.617586  

   Klobas, J. Eric ; Hansen, Janina ; Weisenstein, Debra K. ; Kennedy, Robert P. ; Wilmouth, David M. ( May 2021 , Frontiers in Earth Science)

   As the chemical and physical state of the stratosphere evolves, so too will the rates of important ozone-destroying reactions. In this work, we evaluate the chemistry-climate sensitivity of reactions of stratospheric iodine, reporting the iodine alpha factor (the efficiency of ozone loss mediated by a single iodine atom relative to the ozone loss mediated by a single chlorine atom) and the iodine eta factor (the efficiency of ozone loss mediated by a single iodine atom relative to the ozone loss mediated by a single chlorine atom in a benchmark chemistry-climate state) as a function of future greenhouse gas emissions scenario. We find that iodine-mediated ozone loss is much less sensitive to future changes in the state of the stratosphere than chlorine- and bromine-mediated reactions. Additionally, we demonstrate that the inclusion of the heterogeneous reaction of ozone with aqueous iodide in stratospheric aerosol produces substantial enhancements in the iodine alpha and eta factors relative to evaluations that consider gas-phase iodine reactions only. We conclude that the share of halogen-induced ozone loss due to reactions of iodine will likely be greater in the future stratosphere than it is today.