BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Department of Theoretical Physics - ECPv6.5.1.5//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://web-f1.ijs.si
X-WR-CALDESC:Events for Department of Theoretical Physics
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Ljubljana
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20211005T130000
DTEND;TZID=Europe/Ljubljana:20211005T140000
DTSTAMP:20260428T011133
CREATED:20210923T100508Z
LAST-MODIFIED:20210929T105537Z
UID:4550-1633438800-1633442400@web-f1.ijs.si
SUMMARY:[Biophysics seminar] Antonio Šiber: "Mechanics of inactive swelling and bursting of porate pollen grains"
DESCRIPTION:The structure of pollen grains\, which is typically characterized by soft apertures in an otherwise stiff exine shell\, guides their response to changes in the humidity of the environment. These changes can lead to the desiccation of the grain and its infolding but also to excessive swelling of the grain and even its bursting. Here\, we use an elastic model to explore the mechanics of pollen grain swelling and the role that soft\, circular apertures (pores) play in this process. Small\, circular apertures typically occur in airborne and allergenic pollen grains so that the bursting of such grains is important in the context of human health. We identify and quantify a mechanical weakness of the pores\, which are prone to a rapid inflation once the grain swells to a critical extent. The inflation occurs as a sudden transition and may induce the bursting of the grain and the release of its content. This process crucially depends on the size of the pores and their softness. Our results provide insight in the inactive part of the mechanical response of pollen grains to hydration once they land on a stigma as well as on bursting of airborne pollen grains during changes in air humidity.\n\n\nThe meeting will take place online via Zoom: \nMeeting ID: 833 0750 1179 \nPasscode: bio
URL:https://web-f1.ijs.si/event/biophysics-seminar-antonio-siber-pollen-mechanics/
LOCATION:Zoom
END:VEVENT
END:VCALENDAR