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  • Feb
    15

    ChBE Seminar Series

    McCormick-Chemical and Biological Engineering

    8:45 AM L361, Technological Institute

    EVENT DETAILS

    William Bothfeld, Tyo Lab:

    Title
    A glucose-sensing toggle switch for autonomous, high productivity genetic control

    Abstract
    Great progress has been made in expanding the number and types of chemicals made biologically. Many of the strategies to biosynthesize these chemicals involve production during cell growth. This scheme is inherently limited because feedstock (e.g., sugar) is converted to excess biomass instead of product, essential genes must be maintained for cell growth, and a high titer of product can be toxic to growth and may limit yields. A two-stage growth and production phase strategy could avoid these issues. At bench scale, chemical additions turn on production pathways in cells to implement two-phase strategies. However, these chemicals are expensive and not practical for large scale production. We have developed a genetic toggle switch that uses glucose sensing to enable this two-phase strategy. Temporary glucose starvation precisely and autonomously activates product expression in rich or minimal media, obviating the requirement for inducing chemicals. The switch remains stably in the new state even after reintroduction of glucose. In the context of polyhydroxybutyrate biosynthesis (a bio-polymer), our system enables shorter growth phases and comparable titers to cells that are steadily expressing PHB at near maximal tolerance levels. This two-phase production strategy, and specifically the glucose toggle switch, should be broadly useful to initiate many types of genetic program for metabolic engineering applications.

    Robert Brydon, Broadbelt Lab:

    Title
    Microkinetic modeling of homogeneous and catalyzed oxidation systems

    Abstract
    Epoxidation, a specific form of partial oxidation, is an especially valuable process for the production of resins, plasticizers, curing agents, and more products. Traditional mechanisms used to explain partial oxidation systems are often insufficient when applied to cases where there is a high selectivity to epoxide products. This work sought to create a comprehensive microkinetic model that could be applied to a variety of partial oxidation systems with varying intrinsic selectivities to epoxide products. A challenge in modeling is the ability to sufficiently capture the behavior of complex chemistry without the scale of the model becoming unreasonable. By employing automatic network generation with a reaction family approach, a set of reactions and parameters of manageable size was created for partial oxidation and validated against experimental data. The resultant net flux analysis provided insights that shape a new understanding of epoxidation through radical intermediates. With the contribution of homogeneous oxidation well-defined, the developed microkinetic model was adapted to account for various catalysts. The resultant models were then used to investigate the effect of catalysts, including gold nanoparticles and transition metal oxides, on oxidation activity and selectivity.

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    TIME Thursday, February 15, 2018 at 8:45 AM - 10:00 AM

    LOCATION L361, Technological Institute    map it

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    CONTACT Cody Jarrett    cody.jarrett@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering

  • Apr
    24

    BTP Seminar Series: Pratima Cherukuri, Genezen

    McCormick-Chemical and Biological Engineering (ChBE)

    12:00 PM LR4, Technological Institute

    EVENT DETAILS

    TIME Wednesday, April 24, 2024 at 12:00 PM - 2:00 PM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Jennifer Young    jennifer.young@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • Apr
    25

    ChBE Seminar Series: From, "Will this be on the exam?" to "I enjoyed learning": Motivating Chemical Engineering Education Contexts - Allison Godwin, Cornell University

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, April 25, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    2

    ChBE Seminar Series: "Interfacial colloidal interactions, dynamics, and assembly: from biomembranes to ordered 2D materials" - Peter Beltramo, University of Massachusetts

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 2, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    8

    Extending Care: A Conversation about Conservation and Futurity

    Block Museum of Art

    6:00 PM Block Museum of Art, Mary and Leigh

    EVENT DETAILSmore info

    TIME Wednesday, May 8, 2024 at 6:00 PM - 7:30 PM

    LOCATION Block Museum of Art, Mary and Leigh    map it

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    CONTACT Block Museum of Art    block-museum@northwestern.edu EMAIL

    CALENDAR Block Museum of Art

  • May
    9

    ChBE Seminar Series: Influence of visible photons on catalytic reactions at metal nanoparticle surfaces - Phillip Christopher, University of California, Santa Barbara

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 9, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    16

    35th Annual Hugh M. Hulburt Memorial Lecture: "Adsorption Thermodynamics for Process Simulation" - Chau-Chyun Chen, Texas Tech University

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4 (M113), Technological Institute

    EVENT DETAILS

    TIME Thursday, May 16, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4 (M113), Technological Institute    map it

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    CONTACT Jennifer Young    jennifer.young@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    23

    ChBE Seminar Series: ARDEI Annual Lecture | Christine Reyna, DePaul University

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 23, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    30

    ChBE Seminar Series: Ruihan Li and Kunhuan Liu, Student Seminars

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 30, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • Jun
    10

    Northwestern Engineering PhD Hooding and Master's Degree Recognition Ceremony

    McCormick School of Engineering and Applied Science

    9:00 AM Welsh-Ryan Arena

    EVENT DETAILSmore info

    TIME Monday, June 10, 2024 at 9:00 AM - 11:00 AM

    LOCATION Welsh-Ryan Arena   

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    CONTACT Amy Pokrass    amy.pokrass@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Jun
    10

    Northwestern Engineering Undergraduate Convocation

    McCormick School of Engineering and Applied Science

    2:00 PM Welsh-Ryan Arena

    EVENT DETAILSmore info

    TIME Monday, June 10, 2024 at 2:00 PM - 4:00 PM

    LOCATION Welsh-Ryan Arena   

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    CONTACT Amy Pokrass    amy.pokrass@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science