2,609 research outputs found
Book review: The theatrical public sphere, by Christopher B. Balme
No full textBook review of: The theatrical public sphere, by Christopher B. Balme. Cambridge: Cambridge University Press, 2014; ISBN 9781107006836 (£60.00)Publisher PD
Common greenbrier (Smilax rotundifolia L.) as a model for understanding fungal community organization in the phyllosphere
No full textFungi asymptomatically infect all terrestrial vegetation, but the structure and assembly of these fungal communities are poorly understood. Smilax rotundifolia, a common woody vine of the northeastern United States, was used as a model to study endophytic (internal colonizing) and epiphytic (surface colonizing) fungal communities, from the perspectives of niche-based influences, spatial variation, and evolutionary relationships. Wild greenbrier plants were sampled in New Jersey (USA) in late winter at a single site, and again in mid-summer, in a multi-site, multi-tissue, sampling effort. Fungal communities of the plant surface and interior were made up of mostly different species. Correlative relationships were found between some fungal species' abundances, but none were seen between species that were strongly restricted to the surface and those strongly restricted to the interior. The summer, multi-site study, revealed that the strongest factor determining fungal community composition was surface vs. interior habitat, followed by tissue/organ type, and lastly general geographic location. The effect of season was also studied by comparing the single-site winter dataset against the data from the same site sampled in summer. Season had a major influence on some fungal species but not others, similar to influence of tissue type. Also, in a very novel finding, it was found that certain endophytes showed statistically different abundances, depending on the distance from the stem base at which a sample was taken. The optimum height differed for different fungal species. At the scale of a single stand of plants, it was found that epiphytic, but not endophytic, samples showed a significant correlation between spatial proximity and fungal community similarity. Finally, the phylogenetic relationships were studied between congeneric fungal species that were common on the plant. Two-gene phylogenies were constructed using Smilax-derived isolates, along with downloaded sequences of well-defined species in the same genera. These congeneric species were found to be only distantly related (i.e., they were widely separated within the known phylogenies of their genus). The final chapter is a literature review, bringing insight from the present dissertation research to identify important unanswered questions. Evidence for the role of plant secondary metabolites on endophytic fungi is discussed.Ph.D.Includes bibliographical referencesby Christopher B. Zambel
The Christopher Johnston Family
No full textNotes - Mrs. Daisy Gooding tells the story of her parents’ immigration, marriage and early family life in Athabasca. Her father, Mr. Christopher Johnston, was originally a lay minister and a trader and later opened a bakery in Athabasca with her mother Christine. Mrs. Gooding tells of her parents’ experiences: cooking meals for the North West Mountain Police, dealing with the fire and flu epidemics in the early 1900s, and life in general. She talks of her parents personal and business relationships with many homesteaders as well as First Nation citizens. Many anecdotes are shared including the story of Bill Day and his sleigh pulled by moose. Mrs. Gooding’s father became a ferryman and stories of ferrying on the Athabasca River are part of this tribute to her parents (8 pages
University-affiliated retirement development : a resource for universities
No full textThesis (S.M. in Real Estate Development)--Massachusetts Institute of Technology, Dept. of Architecture, Center for Real Estate, 2004 [first author]; and, (S.M. in Real Estate Development)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, Center for Real Estate, 2004 [second author].This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references.by Christopher B. Helsaback & David B. Ritchey.S.M.in Real Estate Developmen
Book review: Better business: how the B Corp movement is remaking capitalism by Christopher Marquis
No full textIn Better Business: How the B Corp Movement is Remaking Capitalism, Christopher Marquis offers a new study of the history of the B Corp movement as well as its goals, international expansion and its struggles, arguing that it has the potential to redefine capitalism based on principles of accountability, performance, standards and transparency. Marquis’s access to the movement and ability to write organisational history make this book a fantastic read, finds Johannes Lenhard. If you are interested in this book, you can watch a video of the author Christopher Marquis discussing the B Corp movement, social impact and impact investing as part of an LSE student event organised by the Marshall Institute and recorded on 3 March 2021. Better Business: How the B Corp Movement is Remaking Capitalism. Christopher Marquis. Yale University Press. 2020
Book review: Better business: how the B Corp movement is remaking capitalism by Christopher Marquis
No full textIn Better Business: How the B Corp Movement is Remaking Capitalism, Christopher Marquis offers a new study of the history of the B Corp movement as well as its goals, international expansion and its struggles, arguing that it has the potential to redefine capitalism based on principles of accountability, performance, standards and transparency. Marquis’s access to the movement and ability to write organisational history make this book a fantastic read, finds Johannes Lenhard. If you are interested in this book, you can watch a video of the author Christopher Marquis discussing the B Corp movement, social impact and impact investing as part of an LSE student event organised by the Marshall Institute and recorded on 3 March 2021. Better Business: How the B Corp Movement is Remaking Capitalism. Christopher Marquis. Yale University Press. 2020
Supporting Data for “Why So Slow? Mechanistic Insights from Studies of a Poor Catalyst for Polymerization of ε-Caprolactone”
No full textThese files contain data along with associated output from instrumentation supporting all results reported in Stasiw, D. E.; Mandal, M.; Neisen, B. D.; Mitchell, L. A.; Cramer, C. J.; Tolman, W. B. Why so slow? Mechanistic insights from studies of a poor catalyst for polymerization of ε-caprolactone. Inorg. Chem., 2016, 56, 725–728. Polymerization of ε-caprolactone (CL) using an aluminum alkoxide catalyst (1) designed to prevent unproductive trans binding was monitored at 110 °C in toluene-d8 by 1H NMR and the concentration versus time data fit to a first-order rate expression. A comparison of t1/2 for 1 to values for many other aluminum alkyl and alkoxide complexes shows much lower activity of 1 toward polymerization of CL. Density functional theory calculations were used to understand the basis for the slow kinetics. The optimized geometry of the ligand framework of 1 was found indeed to make CL trans binding difficult: no trans-bound intermediate could be identified as a local minimum. Nor were local minima for cis-bound precomplexes found, suggesting a concerted coordination–insertion for polymer initiation and propagation. The sluggish performance of 1 is attributed to a high-framework distortion energy required to deform the “resting” ligand geometry to that providing optimal catalysis in the corresponding transition-state structure geometry, thus suggesting a need to incorporate ligand flexibility in the design of efficient polymerization catalysts..
Corresponding author for experimental data is William B. Tolman ([email protected]).
Corresponding author for computational data is Christopher J. Cramer ([email protected]).Funding for this project was provided by the Center for Sustainable Polymers at the University of Minnesota, a National Science Foundation (NSF)-supported Center for Chemical Innovation (Grant CHE-1413862). The X-ray diffraction experiments were performed using a crystal diffractometer acquired through NSF-MRI Award CHE-1229400. The authors acknowledge the MSI at the University of Minnesota for providing resources that contributed to the research results.Tolman, William, B; Cramer, Christopher, J; Stasiw, Daniel E; Mandal, Mukunda; Neisen, Benjamin D; Mitchell, Lauren A. (2017). Supporting Data for “Why So Slow? Mechanistic Insights from Studies of a Poor Catalyst for Polymerization of ε-Caprolactone”. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/D6F60H
The resistance of cortical bone tissue to failure under cyclic loading is reduced with alendronate
No full textBisphosphonates are the most prescribed preventative treatment for osteoporosis. However, their long-term use has recently been associated with atypical fractures of cortical bone in patients who present with low-energy induced breaks of unclear pathophysiology. The effects of bisphosphonates on the mechanical properties of cortical bone have been exclusively studied under simple, monotonic, quasi-static loading. This study examined the cyclic fatigue properties of bisphosphonate-treated cortical bone at a level in which tissue damage initiates and is accumulated prior to frank fracture in low-energy situations. Physiologically relevant, dynamic, 4-point bending applied to beams (1.5 mm × 0.5 mm × 10 mm) machined from dog rib (n=12/group) demonstrated mechanical failure and micro-architectural features that were dependent on drug dose (3 groups: 0, 0.2, 1.0mg/kg/day; alendronate [ALN] for 3 years) with cortical bone tissue elastic modulus (initial cycles of loading) reduced by 21% (p<0.001) and fatigue life (number of cycles to failure) reduced in a stress-life approach by greater than 3-fold with ALN1.0 (p<0.05). While not affecting the number of osteons, ALN treatment reduced other features associated with bone remodeling, such as the size of osteons (-14%; ALN1.0: 10.5±1.8, VEH: 12.2±1.6, ×10(3) μm2; p<0.01) and the density of osteocyte lacunae (-20%; ALN1.0: 11.4±3.3, VEH: 14.3±3.6, ×10(2) #/mm2; p<0.05). Furthermore, the osteocyte lacunar density was directly proportional to initial elastic modulus when the groups were pooled (R=0.54, p<0.01). These findings suggest that the structural components normally contributing to healthy cortical bone tissue are altered by high-dose ALN treatment and contribute to reduced mechanical properties under cyclic loading conditions.NOTICE: this is the author's version of a work that was accepted for publication in Bone. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bone, Volume 64 (July 2014) DOI: 10.1016/j.bone.2014.03.045Peer reviewe
The Life of Christopher
No full textChristopher, a native of Baghdad who became patriarch of Antioch in about 349/960, was assassinated by Muslim rebels in 356/967 because of his loyalty to their Muslim ruler. When the Byzantines conquered Antioch two years later, his story was told in a variety of ways by those with different and competing interests. Christopher was mentioned in Byzantine histories and in Antiochian liturgies. However, by far the most extensive and detailed version of the story comes to us in the Life of Christopher, written by Ibrāhīm b. Yūḥannā, a Byzantine bureaucrat and translator who grew up in Antioch and knew Christopher when he, Ibrāhīm, was a young boy. The hagiography was originally composed in Greek and translated by its author into Arabic, but only the Arabic survives. Here I provide, for the first time, both a critical edition of the two known Arabic manuscripts and a full English translation. This text is a valuable testimony to Christian life in Antioch under both the Ḥamdānids and the Byzantines, and to the difficulties of life along the constantly shifting frontier of medieval northern Syria
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