{ "154296-21917520": { "datetime_modified":"20261029T171239", "datetime_start":"20261103T120000", "datetime_end":"20261103T125000", "has_end_time":1, "date_start":"2026-11-03", "date_end":"2026-11-03", "time_start":"12:00:00", "time_end":"12:50:00", "time_zone":"America\/Detroit", "event_title":"Drinking Water as a Source of Micro- and Nanoplastic Exposure", "occurrence_title":"", "combined_title":"Drinking Water as a Source of Micro- and Nanoplastic Exposure: Environmental Health Research Webinar, presented by John Lenhart, PhD (Ohio State Univ)", "event_subtitle":"Environmental Health Research Webinar, presented by John Lenhart, PhD (Ohio State Univ)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Zoom webinar registration required https:\/\/myumi.ch\/d8pk9\n\n\"Drinking Water as a Source of Micro- and Nanoplastic Exposure\" presented by John Lenhart, PhD (Ohio State Univ).\n\nThe Integrated Health Sciences Core's (IHSC) webinar series is an interdisciplinary forum for interested researchers to come together to learn and discuss wide-ranging issues in the field of environmental health.\n\nJohn J. Lenhart is a Professor and Associate Chair in the Department of Civil, Environmental, and Geodetic Engineering at The Ohio State University and Co-Director of the Ohio Water Resources Center. His research focuses on contaminant fate and transport, with an emphasis on characterizing interfacial processes in heterogeneous systems. His current microplastics research examines their occurrence in natural and drinking waters, with particular emphasis on quantifying and identifying the sub-micron, or \u201cnanoplastic,\u201d fraction.\n\nOrganized by the Integrated Health Sciences Core (IHSC) of the University of Michigan Lifestage Environmental Exposures and Disease Center (M-LEEaD). Past webinars available on M-LEEaD's YouTube Channel.", "occurrence_notes":"Registration required https:\/\/myumi.ch\/d8pk9", "guid":"154296-21917520@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/154296", "building_id":"null", "building_name":"Off Campus Location", "campus_maps_id":"1", "room":"", "location_name":"Virtual", "has_livestream":0, "cost":"", "tags":["Postdoctoral Research Fellows","Graduate","Health","Health & Wellness","Interdisciplinary","Kinesiology","Lecture","Life Science","Lifelong Learning","Nursing","Nutrition","Free","Pre-Health","Public Health","Public Policy","Rackham","Research","Science","seminar","Talk","Virtual","environmental","Environment","Ecology","Civil and Environmental Engineering","Chemistry","Biosciences","Biology","Basic Science"], "website":"", "sponsors":[ { "group_name":"Michigan Lifestage Environmental Exposures and Disease Center", "group_id":"4335", "website":"https:\/\/twitter.com\/m_leead?lang=en" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/10\/event_154296_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/10\/event_154296_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2026\/10\/event_154296_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2026\/10\/event_154296_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2026\/10\/event_154296_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2026\/10\/event_154296_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/10\/event_154296_original-1.png" }, "occurrence_count":1, "first_occurrence":21917520 } , "153995-21917003": { "datetime_modified":"20261022T150756", "datetime_start":"20261103T120000", "datetime_end":"20261103T130000", "has_end_time":1, "date_start":"2026-11-03", "date_end":"2026-11-03", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"EEB Tuesday Seminar Series - Multi-environment fitness landscapes suggest effectively endless adaptation", "occurrence_title":"", "combined_title":"EEB Tuesday Seminar Series - Multi-environment fitness landscapes suggest effectively endless adaptation: George Zhang, Marshall W. Nirenberg Collegiate Professor", "event_subtitle":"George Zhang, Marshall W. Nirenberg Collegiate Professor", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Seminar Summary - The number of beneficial substitutions (N) required for an adapting population to reach a fitness peak is a fundamental but unknown parameter of evolution. We find that N increases linearly with the number of variable sites in empirical fitness landscapes, regardless of prior adaptation in another environment. Extrapolation suggests a minimal N of 10\u2075 for typical prokaryotes and 10\u2077 for mammals. In contrast, in highly rugged shuffled landscapes, N is markedly reduced, while fitness gains also shrink. The relatively smooth empirical landscapes therefore enable greater fitness gains while lengthening adaptive walks, rendering even local fitness peaks effectively unreachable because natural environments inevitably change. These results explain the persistence of fitness gains in long-term evolution experiments under constant environments and the widespread occurrence of beneficial mutations across species. They suggest that populations continuously adapt while remaining far from fitness optima, challenging the long-held view that adaptation culminates at fitness peaks.", "occurrence_notes":null, "guid":"153995-21917003@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/153995", "building_id":"1005169", "building_name":"Biological Sciences Building", "campus_maps_id":"631", "room":"3150", "location_name":"Biological Sciences Building", "has_livestream":0, "cost":"", "tags":["Research","Professional Development","Science","seminar","Talk","Workshop"], "website":"", "sponsors":[ { "group_name":"Ecology and Evolutionary Biology", "group_id":"1190", "website":"" }, { "group_name":"EEB Tuesday Lunch Seminars", "group_id":"3823", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/10\/event_153995_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/10\/event_153995_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2026\/10\/event_153995_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2026\/10\/event_153995_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2026\/10\/event_153995_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2026\/10\/event_153995_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/10\/event_153995_original-1.png" }, "occurrence_count":1, "first_occurrence":21917003 } }