molecular electronic structure
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Car-Cdr Recursion Problem that Returns the Sum of Every Element in a List of Integers, How Scheme Checks Type During Run-Time Rather than Compilation, Recursive Implementation of the Fibonacci Function in Scheme, Example that Illustrates Runtime Error/Type Checking Vs. Compile-Time Error/Type Checking, Writing a Recursive Flatten Function that Removes All the Intervening Parentheses from a List, Using a Cond Structure to Branch Over the Va...more
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This lecture completes the first half of the semester by analyzing three functional groups in terms of the interaction of localized atomic or pairwise orbitals. Many key properties of biological polypeptides derive from the mixing of such localized orbitals that we associate with "resonance" of the amide group. The acidity of carboxylic acids and the aggregation of methyl lithium into solvated tetramers can be understood in analogous terms...more
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Professor Mazzotta continues his discussion of the Heaven of the Sun (Paradise X-IV), where the earthly disputes between the Franciscan and Dominican orders give way to mutual praise. The tribute St. Thomas pays to the founder of the Franciscan order (Paradise XI) is repaid by St. Bonaventure through his homage to St. Dominic (Paradise XII). The chiasmic structure of these cantos is reinforced by the presence of Nathan and Joachim of Flora...more
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This lecture covers Purgatory V, VI, IX and X. The purgatorial theme of freedom introduced in the previous lecture is revisited in the context of Canto V, where Buonconte da Montefeltro's appearance among the last minute penitents is read as a critique of the genealogical bonds of natural necessity. The poet passes from natural to civic ancestry in Purgatory VI, where the mutual affection of Virgil and Sordello, a former citizen of the cla...more
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April 27, 2009 - Leonard Susskind discusses the basic physics of the diatomic molecule and why you don't have to worry about its structure at low temperature. Susskind later explores a black hole thermodynamics.
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Despite cautions from their conservative elders, young chemists like Paternó and van't Hoff began interpreting molecular graphs in terms of the arrangement of a molecule's atoms in 3-dimensional space. Benzene was one such case, but still more significant was the prediction, based on puzzling isomerism involving "optical activity," that molecules could be "chiral," that is, right- or left-handed. Louis Pasteur effected the first artificial...more
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We can use methods of genetic analysis to connect phylogenic information to geographical histories. Human migration has left genetic traces on every continent, and allows us to trace our roots back to Africa. Molecular genetic methods allow us to determine whether or not trait states were ancestral, which can have profound implications for fundamental biological ideas.
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