{"628372":{"#nid":"628372","#data":{"type":"event","title":"How cells interface with their surroundings: Fluid-structure interactions of membranes and fibers","body":[{"value":"\u003Ch3\u003ESchool of Physics, Nonlinear Science \u0026amp; Mathematical Physics Seminar | Dr.Guillermo Amador | Max Planck Institute|\u0026nbsp;\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EA cell\u0026rsquo;s interactions with the environment are mediated by its cellular membrane and its ultrastructures. Since cells contain and are surrounded by fluids, the hydrodynamics involved during these interactions are critical. They determine the transport of ions and molecules, locomotion, and sensing. Overall, they mediate a cells\u0026rsquo; homeostasis.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this talk, I will present investigations into the fluid-structure interactions of membrane-bound unicellular organisms, specifically fluid slip close to and transmission of shear forces across cellular membranes, and flow enhancement due to fibrous flagellar hairs during swimming. Optical tweezers are used to both apply and measure local forces on free-standing membranes and tethered algal cells. Through these measurements, we find that fluid slip and shear force transmission are highly dependent on the membrane\u0026rsquo;s lipid composition, and that, contrary to previous claims, the fibrous flagellar hairs of algae do not increase the flagella\u0026#39;s effective area while swimming.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOur studies therefore contribute towards building a fundamental understanding of the physical principles\u0026nbsp;governing the transfer of hydrodynamic forces by and through the membrane and its ultrastructures.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"School of Physics, Nonlinear Science \u0026 Mathematical Physics Seminar | Dr.Guillermo Amador | Max Planck Institute| "}],"uid":"30957","created_gmt":"2019-10-30 20:30:58","changed_gmt":"2019-11-05 20:28:47","author":"Shaun Ashley","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-11-20T12:00:00-05:00","event_time_end":"2019-11-20T13:00:00-05:00","event_time_end_last":"2019-11-20T13:00:00-05:00","gmt_time_start":"2019-11-20 17:00:00","gmt_time_end":"2019-11-20 18:00:00","gmt_time_end_last":"2019-11-20 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"628373":{"id":"628373","type":"image","title":"Guillermo Amador","body":null,"created":"1572467534","gmt_created":"2019-10-30 20:32:14","changed":"1572467534","gmt_changed":"2019-10-30 20:32:14","alt":"","file":{"fid":"239311","name":"Amador_Guillermo 11.20.2019.jpg","image_path":"\/sites\/default\/files\/images\/Amador_Guillermo%2011.20.2019.jpg","image_full_path":"http:\/\/www.tlwarc.hg.gatech.edu\/\/sites\/default\/files\/images\/Amador_Guillermo%2011.20.2019.jpg","mime":"image\/jpeg","size":572422,"path_740":"http:\/\/www.tlwarc.hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Amador_Guillermo%2011.20.2019.jpg?itok=R7sa6nbY"}}},"media_ids":["628373"],"groups":[],"categories":[],"keywords":[{"id":"960","name":"physics"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003Eshaun.ashley@physics.gatech.edu\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}