Conferences, Lectures, & Seminars
Events for September
-
Tethered Vesicle Assembly as Monitored by QCM-D
Thu, Sep 11, 2008 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Lyman Handy Colloquium SeriesPresentsCurtis FrankProfessor, Dept. of Chemical Engineering,
Stanford University, Stanford, CA 94305Abstract: One of the stable forms of assemblies that amphiphilic phospholipids can generate in an aqueous solution is that of the vesicle or liposome, which consists of a spherical "sack" encapsulating a liquid (buffer or water) and having a lipid bilayer as the enclosing membrane. In a highly reductionist view, this structure may be able to mimic the cell membrane to some extent. Our research objective has been to develop assembly protocols such that an array of such vesicles could be used as a substrate for a bioanalytical device. The key to such potential devices is that the vesicles be localized at a solid substrate, and we accomplish this through use of a biotin-streptavidin-biotin tethering scheme. Moreover, this tethering protocol permits use of surface-sensitive tools to monitor the array fabrication. In this presentation, we will describe the use of the quartz crystal microbalance with dissipation monitoring to follow the lipid assembly process. We will show how the build-up of the tethered vesicle array may be followed quantitatively, and we will give one example of an antibody-antigen recognition experiment based on the tethered vesicle platform.
Location: Olin Hall of Engineering (OHE) - 122
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
-
Reactive Transport Modeling: From CO2 Geological Sequestration to Geothermal Energy Development
Mon, Sep 22, 2008 @ 03:00 PM - 04:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Tianfu Xu of the Earth Sciences Division, at Lawrence Berkeley National Laboratory will be speaking.Reactive transport modeling can solve problems and answer questions related to CO2 geological sequestration, geothermal energy development, and petroleum engineering such as (1) fate and transport of injected CO2, amount of CO2 dissolved in groundwater and trapped by carbonate minerals, and variations of these storage forms over time, (2) chemical stimulation in a Enhanced Geothermal System (EGS), and optimizing injection water chemistry to avoid mineral precipitation in the geothermal reservoir, and (3) geological disposal of H2S (with CO2), and optimization of injection water chemistry to avoid formation damage due to waterflooding. Comprehensive reactive transport models such as TOUGHREACT have been developed that incorporate aqueous reactions, mineral dissolution and precipitation under equilibrium and kinetic conditions, and gas dissolution and exsolution coupled to multi-phase fluid flow. Practical examples for addressing geological problems and issues in these areas are presented. Recent advances and open challenges are also discussed.
Location: Hedco Pertroleum and Chemical Engineering Building (HED) - 116
Audiences: Everyone Is Invited
Contact: Takimoto Idania
-
Optimal Dynamic Operation of Chemical Processes
Tue, Sep 23, 2008 @ 01:30 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Mork Family Department of Chemical Engineering and Materials Science Distinguished Lecture SeriesPresentsProfessor Jim RawlingsDepartment of Chemical and Biological Engineering
University of Wisconsin-Madison, Madison, WI "Optimal dynamic operation of chemical processes:
assessment of the last 20 years and current research opportunities"Abstract: This talk, intended for the general chemical engineering audience, provides a critical assessment of the research progress in the fields of dynamic operation of chemical processes and process control. The following points are discussed: What new intellectual ideas, concepts, and tools have emerged from this research field during the last 20 years.How successfully have the research innovations in problem conceptualization, formulation, and solution been reduced to industrial practice. What application areas have benefited from this research. Next we present a selection of open problems and research challenges. These research challenges are formulated by enumerating the current industrial needs in different application areas, and identifying common themes that can be addressed by developing new tools in systems theory and engineering. We focus on two topics of interest to our research group: How do we distribute tasks in a large-scale application to a collection of agents/controllers so that the overall system achieves near optimal operation. How do we use systems and control tools to address the larger goal of optimizing process economic performance rather than traditional lower level tasks such as setpoint tracking and disturbance rejection.Location: Hedco Pertroleum and Chemical Engineering Building (HED) - 116
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
-
IN SITU HREM OF MATERIAL REACTIONS
Thu, Sep 25, 2008 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Mork Family Department of Chemical Engineering and Materials Science Distinguished Lecture SeriesPresentsProfessor Robert SinclairDepartment of Materials Science and Engineering,
Stanford University, Stanford, CA 94305Abstract:
The reactions which occur at material interfaces and in thin films have a profound effect on the resulting structure and properties. One effective method to investigate such behavior is to follow its progress, in real time, using high-resolution imaging in a transmission electron microscope. This provides direct viewing, at the atomic level, and allows kinetic measurements by changing the sample temperature in a controlled fashion. The focused-ion beam machine (FIB) further extends this capability. The development of these methods, particularly for materials of interest for semiconductor devices, will be described, and their importance emphasized using an historical analogy.Location: Olin Hall of Engineering (OHE) - 122
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir