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X-WR-CALNAME:UCLA
X-ORIGINAL-URL:https://www.chemistry.ucla.edu
X-WR-CALDESC:Events for UCLA
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TZID:America/Los_Angeles
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TZOFFSETFROM:-0800
TZOFFSETTO:-0700
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DTSTART:20200308T100000
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TZOFFSETFROM:-0700
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DTSTART:20201101T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201201T160000
DTEND;TZID=America/Los_Angeles:20201201T160000
DTSTAMP:20260618T165943
CREATED:20200922T223303Z
LAST-MODIFIED:20200922T223303Z
UID:13363-1606838400-1606838400@www.chemistry.ucla.edu
SUMMARY:Midstream Presentation: Troy Lucas Lowe
DESCRIPTION:Troy Lucas Lowe\nS. Clarke Group \n“Responses of a Protein Arginine Methyltransferase (PRMT7) to Intracellular Stress”
URL:https://www.chemistry.ucla.edu/seminars/midstream-presentation-troy-lucas-lowe/
CATEGORIES:Biochemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201202T163000
DTEND;TZID=America/Los_Angeles:20201202T163000
DTSTAMP:20260618T165943
CREATED:20201117T184718Z
LAST-MODIFIED:20201117T184718Z
UID:13393-1606926600-1606926600@www.chemistry.ucla.edu
SUMMARY:Chem 278: Dr. Evan Doud
DESCRIPTION:“Beyond Traditional Superatom Ligands and Cores” \n Abstract: As technological development continues to advance at a rapid pace\, there is an increasing need for next-generation materials. There are several fundamental challenges associated with developing these novel materials\, including understanding the nature of the electronic contacts and tuning the specific properties of a material. In the context of novel ligands and core compositions of superatoms\, this talk will first describe how Near Edge X-ray Absorption Fine Structure (NEXAFS) and X-ray Photoelectron Spectroscopy (XPS) coupled with Density Functional Theory (DFT) calculations were used to determine the geometry and structure of N-heterocyclic carbenes (NHCs) on a Au(111) surface. Followed by a demonstration of how a novel in situ reduction technique was used to probe the conductance of NHCs on the single molecule level using the Scanning Tunneling Microscopy – Break Junction (STM-BJ) technique. Finally\, the synthesis of nickel phosphinidene superatoms from the uncommon organocyclophosphine precursor will be discussed
URL:https://www.chemistry.ucla.edu/seminars/chem-278-dr-evan-doud/
CATEGORIES:Inorganic Chemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201203T120000
DTEND;TZID=America/Los_Angeles:20201203T120000
DTSTAMP:20260618T165943
CREATED:20201124T234330Z
LAST-MODIFIED:20201124T234330Z
UID:13396-1606996800-1606996800@www.chemistry.ucla.edu
SUMMARY:Chem 218: First Principles Many-Body Theory and Quantum Dynamics for Materials Prediction - Prof. Yuan Ping\, UCSC
DESCRIPTION:First Principles Many-Body Theory and Quantum Dynamics for Materials Prediction  \nMaterials prediction is the ultimate solution for ending blind experimental search within an expansive material parameter space. First-principles theory entirely based on quantum mechanics without prior input parameters is the perfect tool for new material design. In order to predict exotic quantum materials and out-of-equilibrium processes\, many-body physics and quantum kinetic theory are needed to bridge with first-principles methods. \nIn this talk\, I will discuss the past development on theory and numerical codes of solving the Bethe-Salpeter equation without explicit empty states\, for accurate prediction of optical excitation and exciton recombination. I will show the recent developments on radiative and phonon-assisted nonradiative exciton recombination in two-dimensional materials and spin defects.  Next\, I will show our recent method development on real-time quantum dynamics with coupled spins\, electrons\, photons and phonons based on first-principles density-matrix approach. This method will offer new and unbiased insights for spin relaxation and decoherence in general systems\,  and determine design rules for new quantum materials with ideal physical properties for spintronics and quantum information science.
URL:https://www.chemistry.ucla.edu/seminars/chem-218-first-principles-many-body-theory-and-quantum-dynamics-materials-prediction-prof/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201203T160000
DTEND;TZID=America/Los_Angeles:20201203T160000
DTSTAMP:20260618T165943
CREATED:20201030T163609Z
LAST-MODIFIED:20201030T163609Z
UID:13388-1607011200-1607011200@www.chemistry.ucla.edu
SUMMARY:Lessons from molecular evolution: from origin of life to phage-based nanomaterials
DESCRIPTION:Abstract: \nMolecular evolution is a walk over a fitness landscape\, in which populations explore sequence space through mutation and ‘climb’ up fitness peaks. The topography of the fitness landscape governs potential pathways for evolution and determines whether fitness can be optimized by natural selection. We are making exhaustive maps of fitness landscapes for catalytic RNA (ribozymes) by combining in vitro selection with a massively parallel kinetic assay using high-throughput sequencing. In addition\, we take advantage of the ongoing natural selection of phages in order to engineer phage-based nanomaterials for detection and killing of pathogenic bacteria. These nanomaterials combine evolutionarily optimized attachment strategies of phages with the controllable nature of nanomaterials to circumvent some obstacles to phage therapy.
URL:https://www.chemistry.ucla.edu/seminars/lessons-molecular-evolution-origin-life-phage-based-nanomaterials/
CATEGORIES:Organic Colloquium,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201204T153000
DTEND;TZID=America/Los_Angeles:20201204T153000
DTSTAMP:20260618T165943
CREATED:20200922T223440Z
LAST-MODIFIED:20200922T223440Z
UID:13364-1607095800-1607095800@www.chemistry.ucla.edu
SUMMARY:Chem 268: Joe Loo
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/seminars/chem-268-joe-loo/
CATEGORIES:Biochemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201207T160000
DTEND;TZID=America/Los_Angeles:20201207T160000
DTSTAMP:20260618T165943
CREATED:20200922T231202Z
LAST-MODIFIED:20200922T231202Z
UID:13374-1607356800-1607356800@www.chemistry.ucla.edu
SUMMARY:Chem 228: Prof. Theodore Goodson
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/seminars/chem-228-prof-theodore-goodson/
CATEGORIES:Physical Chemistry Seminar,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201208T160000
DTEND;TZID=America/Los_Angeles:20201208T160000
DTSTAMP:20260618T165943
CREATED:20200922T223648Z
LAST-MODIFIED:20200922T223648Z
UID:13365-1607443200-1607443200@www.chemistry.ucla.edu
SUMMARY:Midstream Presentation: Keaton Barr
DESCRIPTION:Keaton Barr \nChanfreau Group \n“Transcriptional Roadblocks Protect Against Pervasive Transcription\, and the Regulation of a Manganese Transporter via the Endoribonuclease Rnt1p”
URL:https://www.chemistry.ucla.edu/seminars/midstream-presentation-keaton-barr/
CATEGORIES:Biochemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201209T163000
DTEND;TZID=America/Los_Angeles:20201209T163000
DTSTAMP:20260618T165943
CREATED:20201007T183210Z
LAST-MODIFIED:20201007T183210Z
UID:13383-1607531400-1607531400@www.chemistry.ucla.edu
SUMMARY:Chem 278: Prof. Michael T. Yeung
DESCRIPTION:“Metallic and Covalent Bonding in Materials: Role in Properties\, Structure\, and Stability” \n Abstract: The search for new ultraincompressible\, superhard materials has been performed largely through trial and error. Despite the difficulties in synthesizing such materials\, interest in this field has blossomed with recent experimental and theoretical results. Such progress has led to the development of superhard metal borides\, ultraincompressible nitrides\, and strong carbides. By studying the origin of strength from previously discovered ultraincompressible\, hard materials\, we hope to gain new insight into this rapidly growing field. In particular\, we propose a focus on bonding and microstructure to understand why some materials are ultraincompressible and superhard.
URL:https://www.chemistry.ucla.edu/seminars/chem-278-prof-michael-t-yeung/
CATEGORIES:Inorganic Chemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201210T120000
DTEND;TZID=America/Los_Angeles:20201210T120000
DTSTAMP:20260618T165943
CREATED:20201117T190317Z
LAST-MODIFIED:20201117T190317Z
UID:13394-1607601600-1607601600@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: Victoria Basile
DESCRIPTION:“Nanostructured Nickel-Rich Cathode Materials for High-Capacity and Fast-Charging Lithium-Ion Batteries” \nABSTRACT: Fast-charging lithium-ion batteries are desired for use in personal electronics and electric vehicles\, potentially allowing systems to charge devices in minutes rather than hours. Fast-charging can be achieved by nanostructuring battery materials\, which decreases lithium-ion diffusion lengths and can suppress slow\, rate-limiting phase transitions. This method of nanostructuring battery materials to enhance fast-charging performance has been shown in many anode materials. However\, lithium-ion batteries are usually limited by the capacity of their cathodes (< 200 mAh/g). Unfortunately\, fewer fast-charging cathode materials have been identified\, and those that have been suffer from capacity loss upon nanostructuring. Here\, we studied the nickel-rich cathode material LiNi0.80Co0.15Al0.05O2 (NCA)\, which has high-capacity and shows solid-solution behavior without a phase transitions in bulk materials. Because phase transitions do not limit intercalation kinetics in bulk NCA\, materials only need to be nanostructured to decrease lithium-ion diffusion lengths to the point that solid-state diffusion is not rate limiting. Here we demonstrated the use of polymer templating\, combined with sol-gel synthesis\, to produce nanoporous NCA with medium and small particle sizes. We can then study the effect of size on the material’s electrochemical properties. Interestingly\, we found that NCA materials with medium particle sizes perform best at fast rates. Their performance is better than that of bulk materials because of their decreased lithium-ion diffusion lengths\, which allows for fast-charging. NCA materials with medium sized particles also out-perform materials with small particles\, however\, and this is because nickel-rich materials are highly air-sensitive\, and the smaller particles have higher surface areas\, leading to more undesirable reactions with air that produce insulating surface layers that can hinder lithium-ion diffusion at fast rates. These results indicate that the smallest particle sizes are not always optimal and that a balance exists between lithium-ion diffusion distances and surface reactivity for nickel-rich cathode materials.
URL:https://www.chemistry.ucla.edu/seminars/chem-218-student-exit-seminar-victoria-basile/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201210T160000
DTEND;TZID=America/Los_Angeles:20201210T160000
DTSTAMP:20260618T165943
CREATED:20201116T215657Z
LAST-MODIFIED:20201116T215657Z
UID:13392-1607616000-1607616000@www.chemistry.ucla.edu
SUMMARY:Harnessing Conformational Dynamics to Engineer New Enzymes: Prof. Lynn Kamerlin\, Uppsala University
DESCRIPTION:Harnessing Conformational Dynamics to Engineer New Enzymes\nUnderstanding how new enzyme functions evolve\, either on existing scaffolds\, or completely de novo on previously non-catalytic scaffolds\, is of great interest both from a fundamental biochemistry perspective\, and from a biotechnological perspective. Several hypotheses have been put forward to rationalize enzyme evolution\, one of which is that their conformational dynamics plays an important role in facilitating the emergence of new enzyme functions.[1-3] My team and I have invested substantial research effort into understanding enzyme multifunctionality in catalytically promiscuous enzymes\,[4-7] as well as the structure-function-dynamics relationships shaping the evolution of new enzyme functions\, in both natural and engineered active sites.[8-12] In this talk\, I will discuss recent progress in this area\, and illustrate how we have engineered conformational dynamics to generate a a de novo active site capable of catalyzing a non-natural reaction\,[9] and then subsequently enhanced this activity using a simple computational approach\, reaching catalytic efficiency comparable to that of naturally occurring enzymes.[13]   \n[1] James & Tawfik\, Trends Biochem. Sci.\, 2003\, 28\, 361. [2] Tokuriki & Tawfik\, Science\, 2009\, 324\, 203. [3] Crean et al.\, J. Am. Chem. Soc.\, 2020\, 142\, 11324. [4] Barrozo et al.\, J. Am. Chem. Soc.\, 2015\, 137\, 9061. [5] Ben-David et al.\, J. Mol. Biol.\, 2015\, 427\, 1359. [6] Blaha-Nelson et al.\, J. Am. Chem. Soc.\, 2017\, 139\, 1155. [7] Purg et al.\, J. Am. Chem. Soc.\, 2017\, 139\, 17533. [8] Ma et al.\, Chem. Sci.\, 2016\, 7\, 1415. [9] Risso et al.\, Nat. Commun.\, 2017\, 8\, 16113. [10] Petrović et al.\, ACS Catal.\, 2017\, 6\, 6188. [11] Baier et al.\, eLife\, 2019\, 8\, e40789. [12] Kaltenbach et al.\, Nat. Chem. Biol.\, 2018\, 14\, 548. [13] Risso et al.\, Chem. Sci. 2020\, 11\, 6134.
URL:https://www.chemistry.ucla.edu/seminars/harnessing-conformational-dynamics-engineer-new-enzymes-prof-lynn-kamerlin-uppsala/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201215T130000
DTEND;TZID=America/Los_Angeles:20201215T130000
DTSTAMP:20260618T165943
CREATED:20201203T171431Z
LAST-MODIFIED:20201203T171431Z
UID:13397-1608037200-1608037200@www.chemistry.ucla.edu
SUMMARY:NSF Center for Integrated Catalysis Webinar Series
DESCRIPTION:The NSF Center for Integrated Catalysis is delighted to announce that it will be hosting a monthly webinar series. The Fourth day of this series will be held on Tuesday\, December 15th at 1:00 PM.  We are pleased to invite all students\, postdocs\, faculty\, and staff.
URL:https://www.chemistry.ucla.edu/seminars/nsf-center-integrated-catalysis-webinar-series-2/
CATEGORIES:Other,Seminars
END:VEVENT
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