Now showing items 4865-4884 of 18256

    • Enantioselective Selenocyclization via Dynamic Kinetic Resolution of Seleniranium Ions by Hydrogen-Bond Donor Catalysts 

      Zhang, Hu; Lin, Song; Jacobsen, Eric N. (American Chemical Society, 2014)
      Highly enantioselective selenocyclization reactions are promoted by the combination of a new chiral squaramide catalyst, a mineral acid, and an achiral Lewis base. Mechanistic studies reveal that the enantioselectivity ...
    • Enantioselective Synthesis of (+)-Cephalostatin 1 

      Fortner, Kevin; Kato, Darryl; Tanaka, Yoshiki; Shair, Matthew David (American Chemical Society, 2010)
      This Article describes an enantioselective synthesis of cephalostatin 1. Key steps of this synthesis are a unique methyl group selective allylic oxidation, directed C−H hydroxylation of a sterol at C12, Au(I)-catalyzed ...
    • Enantioselective Synthesis of the Lomaiviticin Aglycon Full Carbon Skeleton Reveals Remarkable Remote Substituent Effects During the Dimerization Event 

      Lee, Hong Geun; Ahn, Jae Young; Lee, Amy S; Shair, Matthew David (Wiley-Blackwell, 2012-01-19)
    • Enantioselective Total Synthesis of Hyperforin 

      Sparling, Brian Andrew; Moebius, David C.; Shair, Matthew David (American Chemical Society, 2013)
      A modular, 18-step total synthesis of hyperforin is described. The natural product was quickly accessed using latent symmetry elements, whereby a group-selective, Lewis acid-catalyzed epoxide-opening cascade cyclization ...
    • Encapsulated liquid sorbents for carbon dioxide capture 

      Vericella, John J.; Baker, Sarah E.; Stolaroff, Joshuah K.; Duoss, Eric B.; Hardin, James O.; Lewicki, James; Glogowski, Elizabeth; Floyd, William C.; Valdez, Carlos A.; Smith, William L.; Satcher, Joe H.; Bourcier, William L.; Spadaccini, Christopher M.; Lewis, Jennifer; Aines, Roger D. (Nature Publishing Group, 2015)
      Drawbacks of current ​carbon dioxide capture methods include corrosivity, evaporative losses and fouling. Separating the capture solvent from infrastructure and effluent gases via microencapsulation provides possible ...
    • Encoding Processes during Retrieval Tasks 

      Buckner, Randy Lee; Wheeler, Mark E.; Sheridan, Margaret (MIT Press - Journals, 2001)
      Episodic memory encoding is pervasive across many kinds of task and often arises as a secondary processing effect in tasks that do not require intentional memorization. To illustrate the pervasive nature of information ...
    • Encoding-Specific Effects of Social Cognition on the Neural Correlates of Subsequent Memory 

      Mitchell, Jason Paul; Macrae, C. Neil; Banaji, Mahzarin R. (Society for Neuroscience, 2004)
      To examine whether social cognition recruits distinct mental operations, we measured brain activity during social (“form an impression of this person”) and relatively nonsocial (“remember the order in which person information ...
    • Encore!: Homecoming Recitals in Christian South Korea 

      Harkness, Nicholas H. (Muse - Johns Hopkins University Press, 2012)
      "Homecoming Recitals" (kwiguk tokch'anghoe) in South Korea are events in which singers of European-style classical music, after having studied and worked professionally abroad, return home and are integrated into the social ...
    • Encounter: The Rothschild Canticles 

      Hamburger, Jeffrey F. (University of Chicago Press, 2014)
    • Encountering Pacific Art 

      Gaskell, Ivan (Museum Ethnographers Group, 2009)
    • The Encyclopedia of Life v2: Providing Global Access to Knowledge About Life on Earth 

      Parr, Cynthia S.; Wilson, Nathan; Leary, Patrick; Schulz, Katja S.; Lans, Kristen; Walley, Lisa; Hammock, Jennifer A.; Goddard, Anthony; Rice, Jeremy; Studer, Marie; Holmes, Jeffrey T. G.; Corrigan, Jr., Robert J. (Pensoft Publishers, 2014)
      Abstract The Encyclopedia of Life (EOL, http://eol.org) aims to provide unprecedented global access to a broad range of information about life on Earth. It currently contains 3.5 million distinct pages for taxa and provides ...
    • End User Empowerment in Human Centered Pervasive Computing 

      Gajos, Krzysztof Z; Fox, Harold; Shrobe, Howard (Springer, 2002)
      Human-centered computation is characterized by at least three features: it must be adaptive, reactive, and it must empower the user to configure and extend the behavior of the systems using her natural modes of interaction. ...
    • End-to-End Enforcement of Erasure and Declassification 

      Chong, Stephen N; Myers, Andrew C. (Institute of Electrical and Electronics Engineers Computer Society, 2008)
      Declassification occurs when the confidentiality of information is weakened; erasure occurs when the confidentiality of information is strengthened, perhaps to the point of completely removing the information from the ...
    • Endangered Right Whales Enhance Primary Productivity in the Bay of Fundy 

      Roman, Joe; Nevins, John; Altabet, Mark; Koopman, Heather; McCarthy, James (Public Library of Science, 2016)
      Marine mammals have recently been documented as important facilitators of rapid and efficient nutrient recycling in coastal and offshore waters. Whales enhance phytoplankton nutrition by releasing fecal plumes near the ...
    • “Endemism” Relative to Space, Time, and Taxonomic Level 

      Flynn, Lawrence John; Morgan, Michèle E.; Pilbeam, David; Barry, John C. (Finnish Zoological and Botanical Publishing Board, 2014)
      Faunal assemblages consist of immigrants, endemics and long-term residents; changes in proportions of these categories through time reflect general aspects of faunal stability and turnover. To study stability and change ...
    • The Ending of the PIE 2 sg. Middle Imperative 

      Jasanoff, Jay H. (Harrassowitz Verlag, 2006)
    • Endocrinology, energetics, and human life history: A synthetic model 

      Ellison, Peter T. (Elsevier BV, 2017)
      Human life histories are shaped by the allocation of metabolic energy to competing physiological domains. A model framework of the pathways of energy allocation is described and hormonal regulators of allocation along the ...
    • Endogenizing Syndromes 

      Collier, Paul; Bates, Robert H.; Hoeffler, Anke; O'Connell, Stephen A. (Cambridge University Press, 2007)
    • Endogenous agendas and seniority advantage 

      Shepsle, Kenneth A.; Eguia, J (2012)
      We study a legislative assembly that chooses its agenda protocol endogenously. We generalize McKelvey and Riezman’s (1992) seminal theory on seniority in legislatures, by allowing for a large class of ordinal agenda rules ...
    • Endogenous Entry, Product Variety, and Business Cycles 

      Bilbiie, Florin O.; Ghironi, Fabio; Melitz, Marc J. (The University of Chicago Press, 2012)
      This paper builds a framework for the analysis of macroeconomic fluctuations that incorporates the endogenous determination of the number of producers and products over the business cycle. Economic expansions induce higher ...