Nobel / en 茄子直播 chemists uncover a means to control catalytic reactions /news/u-t-chemists-uncover-means-control-catalytic-reactions <span class="field field--name-title field--type-string field--label-hidden">茄子直播 chemists uncover a means to control catalytic reactions</span> <div class="field field--name-field-featured-picture field--type-image field--label-hidden field__item"> <img loading="eager" srcset="/sites/default/files/styles/news_banner_370/public/2016-12-12-polanyi.jpg?h=afdc3185&amp;itok=El9d1c1r 370w, /sites/default/files/styles/news_banner_740/public/2016-12-12-polanyi.jpg?h=afdc3185&amp;itok=GcAlas2E 740w, /sites/default/files/styles/news_banner_1110/public/2016-12-12-polanyi.jpg?h=afdc3185&amp;itok=aWDCpObw 1110w" sizes="(min-width:1200px) 1110px, (max-width: 1199px) 80vw, (max-width: 767px) 90vw, (max-width: 575px) 95vw" width="740" height="494" src="/sites/default/files/styles/news_banner_370/public/2016-12-12-polanyi.jpg?h=afdc3185&amp;itok=El9d1c1r" alt="Photo from Polanyi lab"> </div> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span>ullahnor</span></span> <span class="field field--name-created field--type-created field--label-hidden"><time datetime="2016-12-12T15:14:34-05:00" title="Monday, December 12, 2016 - 15:14" class="datetime">Mon, 12/12/2016 - 15:14</time> </span> <div class="clearfix text-formatted field field--name-field-cutline-long field--type-text-long field--label-above"> <div class="field__label">Cutline</div> <div class="field__item">From left to right, 茄子直播's Nobel Prize-winning chemist John Polanyi with PhD candidate Kelvin Anggara, research associate Lydie Leung and postdoctoral researcher Kai Huang (photo by Jaclyn Shapiro)</div> </div> <div class="field field--name-field-author-reporters field--type-entity-reference field--label-hidden field__items"> <div class="field__item"><a href="/news/authors-reporters/sean-bettam" hreflang="en">Sean Bettam</a></div> </div> <div class="field field--name-field-author-legacy field--type-string field--label-above"> <div class="field__label">Author legacy</div> <div class="field__item">Sean Bettam</div> </div> <div class="field field--name-field-topic field--type-entity-reference field--label-above"> <div class="field__label">Topic</div> <div class="field__item"><a href="/news/topics/breaking-research" hreflang="en">Breaking Research</a></div> </div> <div class="field field--name-field-story-tags field--type-entity-reference field--label-hidden field__items"> <div class="field__item"><a href="/news/tags/chemistry" hreflang="en">Chemistry</a></div> <div class="field__item"><a href="/news/tags/john-polanyi" hreflang="en">John Polanyi</a></div> <div class="field__item"><a href="/news/tags/nobel" hreflang="en">Nobel</a></div> <div class="field__item"><a href="/news/tags/research-innovation" hreflang="en">Research &amp; Innovation</a></div> </div> <div class="clearfix text-formatted field field--name-body field--type-text-with-summary field--label-hidden field__item"><p>Scientists at the University of Toronto have found a way to make catalysis 鈥 the use of catalysts to facilitate chemical reactions 鈥 more selective, breaking one chemical bond 100 times faster than another. The findings are described in a study published in <em><a href="http://www.nature.com/articles/ncomms13690">Nature Communications</a></em>.</p> <p>The team of researchers&nbsp;led by Nobel Prize-winning chemist <strong>John Polanyi</strong>&nbsp;employed a combination of experiment and theory to discover that the position of the molecule on the catalytic surface is a key factor in determining the rate at which particular bonds break.</p> <p>鈥淲e found that the microscopic positioning of the molecule relative to the catalytic surface below, rendered the catalyst highly bond-specific,鈥 says Polanyi, university professor in the department of chemistry at 茄子直播. 鈥淭he closer the alignment of the bonds of the molecule to the rows of atoms in the catalyst, the more selective was the reaction.鈥</p> <p>The scientists investigated a chemical reaction that involved breaking carbon-to-iodine bonds in the organic molecule iodobenzene&nbsp;by means of metallic copper, a common catalyst. The reaction was initiated by an electron coming from the tip of a microscope, which attached itself to the iodobenzene.</p> <p>鈥淲e observed acceleration in the reactivity of the carbon-to-iodine bonds when those bonds were aligned along rows of copper atoms in the catalyst, as compared to the bonds aligned across the copper rows,鈥 says <strong>Kelvin Anggara</strong>, a PhD candidate in Polanyi鈥檚 research group and a lead author of the study.</p> <p>鈥淭he copper surface acted more strongly on bonds that were nearby than on bonds that were further away,鈥 Anggara says. 鈥淲e saw 100-fold differences in reactivity between bonds pointing in specific directions on the catalyst.鈥</p> <p>The experiment could be explained by a mathematical model developed by the researchers over the past few years, which enabled them to produce a computer-generated movie of the motions of the atoms involved in the bond-breaking at the copper surface. It was the movie that revealed the reason why the copper catalyzed the bonds along its rows in preference to bonds across the rows.</p> <p>鈥淭he copper atoms along the rows were slightly closer together&nbsp;by about the diameter of a single atom&nbsp;than the atoms across the rows,鈥 says Anggara. 鈥淭his closer spacing promoted the breaking of bonds lying along the rows.鈥</p> <p>The method is rooted in the study of chemical reactions taking place at the surface of solid materials that has guided Polanyi and his colleagues for decades. Following his Nobel Prize in chemistry in 1986 for observing the molecular motions in chemical reactions occurring in gases, Polanyi began studying the reactions of individual molecules lying on well-defined catalytic surfaces.</p> <p>Polanyi says scientists are only beginning to understand how catalysis operates, and that the shift towards green chemistry makes knowing as much as possible about catalysts and how they reduce waste caused by chemical reactions more important than ever before.</p> <p>鈥淭he challenge for the future will be to fabricate metal catalysts embodying atomic patterns that speed chemical reactions along pathways that lead to desired products,鈥 said Polanyi. 鈥淩ecent advances in the construction of surfaces, atom-by-atom, lend themselves to the fabrication of such engineered-catalysts. We鈥檙e now a bit closer to that&nbsp;since we begin to understand what patterns of atoms make the best catalysts.鈥</p> <p>The findings are reported in the study <a href="http://www.nature.com/articles/ncomms13690">鈥淏ond selectivity in electron-induced reaction due to directed recoil on an anisotropic substrate.鈥 </a></p> <p>Support for the research was provided by the Natural Sciences and Engineering Research Council of Canada, 茄子直播 NSERC General Research Fund and the Connaught International Scholarship for Doctoral Studies. Computations were performed on the SciNet HPC Consortium supercomputer at 茄子直播.</p> </div> <div class="field field--name-field-news-home-page-banner field--type-boolean field--label-above"> <div class="field__label">News home page banner</div> <div class="field__item">Off</div> </div> Mon, 12 Dec 2016 20:14:34 +0000 ullahnor 102797 at But is it literature? 茄子直播 experts on Bob Dylan's Nobel Prize /news/it-literature-u-t-experts-bob-dylans-nobel-prize <span class="field field--name-title field--type-string field--label-hidden">But is it literature? 茄子直播 experts on Bob Dylan's Nobel Prize</span> <div class="field field--name-field-featured-picture field--type-image field--label-hidden field__item"> <img loading="eager" srcset="/sites/default/files/styles/news_banner_370/public/2016-10-13-bob-dylan-lead_0.jpg?h=afdc3185&amp;itok=L4YOU9_W 370w, /sites/default/files/styles/news_banner_740/public/2016-10-13-bob-dylan-lead_0.jpg?h=afdc3185&amp;itok=rDgEJjND 740w, /sites/default/files/styles/news_banner_1110/public/2016-10-13-bob-dylan-lead_0.jpg?h=afdc3185&amp;itok=eRCSTPeW 1110w" sizes="(min-width:1200px) 1110px, (max-width: 1199px) 80vw, (max-width: 767px) 90vw, (max-width: 575px) 95vw" width="740" height="494" src="/sites/default/files/styles/news_banner_370/public/2016-10-13-bob-dylan-lead_0.jpg?h=afdc3185&amp;itok=L4YOU9_W" alt="photo of Bob Dylan in concert"> </div> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span>lavende4</span></span> <span class="field field--name-created field--type-created field--label-hidden"><time datetime="2016-10-14T11:35:14-04:00" title="Friday, October 14, 2016 - 11:35" class="datetime">Fri, 10/14/2016 - 11:35</time> </span> <div class="clearfix text-formatted field field--name-field-cutline-long field--type-text-long field--label-above"> <div class="field__label">Cutline</div> <div class="field__item">Bob Dylan performing at a musical festival in western France in 2012 (photo by Fred Tanneau/Getty images)</div> </div> <div class="field field--name-field-author-reporters field--type-entity-reference field--label-hidden field__items"> <div class="field__item"><a href="/news/authors-reporters/arthur-kaptainis" hreflang="en">Arthur Kaptainis</a></div> </div> <div class="field field--name-field-author-legacy field--type-string field--label-above"> <div class="field__label">Author legacy</div> <div class="field__item">Arthur Kaptainis</div> </div> <div class="field field--name-field-topic field--type-entity-reference field--label-above"> <div class="field__label">Topic</div> <div class="field__item"><a href="/news/topics/global-lens" hreflang="en">Global Lens</a></div> </div> <div class="field field--name-field-story-tags field--type-entity-reference field--label-hidden field__items"> <div class="field__item"><a href="/news/tags/faculty-music" hreflang="en">Faculty of Music</a></div> <div class="field__item"><a href="/news/tags/music" hreflang="en">Music</a></div> <div class="field__item"><a href="/news/tags/u-t" hreflang="en">茄子直播</a></div> <div class="field__item"><a href="/news/tags/ken-mcleod" hreflang="en">Ken McLeod</a></div> <div class="field__item"><a href="/news/tags/don-mclean" hreflang="en">Don McLean</a></div> <div class="field__item"><a href="/news/tags/nobel" hreflang="en">Nobel</a></div> <div class="field__item"><a href="/news/tags/international" hreflang="en">International</a></div> <div class="field__item"><a href="/news/tags/bob-dylan" hreflang="en">Bob Dylan</a></div> </div> <div class="clearfix text-formatted field field--name-body field--type-text-with-summary field--label-hidden field__item"><p>The Swedish Academy stunned the world and delighted music enthusiasts of many generations on&nbsp;Thursday by awarding the Nobel Prize in Literature to celebrated singer-songwriter Bob Dylan.</p> <p>The news is making headlines here at home and around the world. (Read&nbsp;茄子直播's<strong> Ira Wells</strong> in <em><a href="http://www.theglobeandmail.com/opinion/jokerman-the-perverse-genius-of-bob-dylan/article32350028/">The Globe and Mail </a>and&nbsp;</em><a href="http://news.nationalpost.com/news/canada/its-a-wonder-that-you-still-know-how-to-breathe-canadian-academics-share-their-favourite-bob-dylan-verses">&nbsp;<em>The National Post</em></a>)</p> <p><em>茄子直播 News </em>spoke to <strong>Robin Elliott</strong>, professor of musicology and Jean A. Chalmers Chair in Canadian Music; <strong>Don McLean</strong>, professor and dean of the Faculty of Music; <strong>Ken McLeod</strong>, associate professor of music and culture at 茄子直播 Scarborough; and <strong>Ira Wells</strong>, a sessional instructor in&nbsp; American literature in the department of English.</p> <hr> <p><strong>Is this a surprising award?</strong></p> <p><strong>Ira&nbsp;Wells:</strong> It is rare for an&nbsp; American to win the Nobel Prize in Literature. The last was Toni Morrison in 1993. And&nbsp;obviously Dylan is the first pop singer. Many recent Nobel literature laureates have been niche figures, known only in literary circles. It is rare that you get a celebrity on these lists, especially someone of Dylan鈥檚 magnitude.</p> <p><strong>Ken&nbsp;McLeod:</strong> I think it鈥檚 wonderful that a singer-songwriter has been recognized for the quality and impact of lyrics. Going back to the ancient Greeks, the great narrative epics were accompanied and enhanced by music. The ability to write literature and/or poetry as an adjunct to music has been highly prized in classical music&nbsp;from the criticism of Robert Schumann, the narratives of Berlioz and, perhaps most prominently, in the works of Richard Wagner, who is celebrated for having written both the texts and music for his music dramas.</p> <p><strong>But do lyrics on their own count as literature?</strong></p> <p><strong>Ira Wells:</strong> There is a relatively simple way of addressing that question. Do the lyrics yield multiple interpretations? Is it possible to read these lyrics and come up with multiple interpretations that would reward serious, close reading? That is a baseline for a university professor deciding whether or not something counts as literature. It is indisputably the case that Dylan鈥檚 best songs 鈥&nbsp;"Like a Rolling Stone," "Visions of Johanna," "Every Grain of Sand" 鈥 meet this threshold.</p> <p><strong>Don&nbsp;McLean:</strong> Popular-music lyrics across a wide range of genres make up arguably the most significant poetic form of the 20th and early 21st centuries. Lieder and folksong-derived nationalisms of the long 19th century remained confined largely to arts-circle and upper-middle-class elites. Sound reproduction paved the way for the radio and record industries,&nbsp;without which the ubiquity of popular music is unthinkable. For many, American and British popular music became the iconic poetics and affective underpinning of the age, which is in part why relationships to music and artists are so nostalgia-&nbsp;&nbsp;and memory-driven.</p> <p><strong>Ken McLeod:</strong> In an age of 鈥 I would argue 鈥 declining emphasis on meaningful lyrical content in popular music, it is nice to see that indeed words can and do matter (with apologies to Donald Trump). Even though it is clear that many listeners mishear a large percentage of Dylan鈥檚 lyrics in his recordings (as indeed is the case for many pop music recordings).</p> <p><strong>There are many Dylans. Is he still equated substantially with the early protest songs?</strong></p> <p><strong>Ira Wells:</strong> For many of his most ardent fans, Dylan has never really outgrown that phase of his career. "The Times They Are A-Changin" and "Blowin鈥 in the Wind": that is what Bob Dylan is. In fact, that protest period lasted only a few years. By the mid-1960s he had become something quite different. Bringing It All Back Home and Blonde on Blonde are more or less apolitical albums.</p> <p>This is what is fascinating about Dylan as a cultural figure. He has changed so many times. And he has not only changed, he seems almost in a perverse way to react against the expectations and desires of his audience. Just when people are starting to celebrate him as a folk protest singer, he plugs in and becomes a rock 'n'&nbsp;roll star. Just when rock 'n'&nbsp;roll becomes culturally accepted in the late 1960s, he reinvents himself as a country song writer in Nashville Skyline. When we move into disco and punk in the late 1970s, Bob Dylan becomes a Christian gospel singer.</p> <p><strong>Is this contrarianism a literary quality?</strong></p> <p><strong>Ira Wells:</strong> It certainly implies that he is not abiding by market imperatives. It suggests that there is something else going on. He is not responding to the marketplace as did the other well-known musical acts of his generation: The Rolling Stones, U2, Paul McCartney. Dylan rises above the marketplace. And he defies expectations in a manner that seems almost deliberately calibrated to alienate his fans. If you have ever seen him in concert, he almost never addresses the audience. He makes no attempt to entertain you. He does his thing, and you either get it or you don鈥檛.</p> <p><strong>How will other musicians react to&nbsp;this?</strong></p> <p><strong>Don McLean:</strong> Dylan was, and is, considered hugely influential by many contemporary and later musicians. I have heard this directly from Joni Mitchell and Patti Smith. The Beatles鈥檚 lyrics and generic mimicking were puerile until they started breathing at Dylan depth. These artists use song as the chariot of poetry. As with Dylan, the music bears the lyrics forward and gives them a halo of reflective complexity not always evident in the text itself.</p> <p><strong>Would it be valid to call Dylan a revolutionary?</strong></p> <p><strong>Don McLean:</strong> The idea of 鈥済ame changers鈥 and stylistic 鈥渞evolutionary steps forward鈥 in popular music always seems improbable to classically-trained musicians, on harmonic grounds alone. But Bob Dylan鈥檚 lyrics, music and performances 鈥 "Like a Rolling Stone," "Mr. Tambourine Man," "Every Grain of Sand" 鈥 his folk-blasting electrification and his gravelly but never grovelling voice-of-God delivery&nbsp;have all given many cause for pause.</p> <p><strong>Does the Dylan victory give Canada&nbsp;hope for a&nbsp;Nobel? Or at least make it&nbsp;possible to view lyrics more critically?</strong></p> <p><strong>Robin Elliott:</strong> Leonard Cohen would be the nearest Canadian equivalent to Bob Dylan. Both were poet-songwriters who negotiated the boundaries between folk and pop music while capturing the Zeitgeist of the 1960s and beyond. Both have received widespread acclaim and recognition for both their literary and musical activity over the past five decades and more.</p> </div> <div class="field field--name-field-news-home-page-banner field--type-boolean field--label-above"> <div class="field__label">News home page banner</div> <div class="field__item">Off</div> </div> Fri, 14 Oct 2016 15:35:14 +0000 lavende4 101421 at