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DTSTAMP:20260105T105730
DTSTART;TZID=America/Detroit:20260209T160000
DTEND;TZID=America/Detroit:20260209T171500
SUMMARY:Workshop / Seminar:Gomberg Lecture with Gil Nathanson \"Big Atmosphere\, Little Droplets\, Tiny Atoms: What Can Helium Atoms Teach Us About Sea Spray?\"
DESCRIPTION:Sea spray droplets are complex beasts that contain surface-active organic molecules in addition to water and salts. These aerosol particles behave like little chemical laboratories that transform gases in the atmosphere and alter the concentration of key species\, including ozone\, the hydroxyl radical\, and methane.  But what do helium atoms have to with aerosols? Amazingly\, when helium atoms are dissolved in sea spray proxies\, they evaporate at super-Maxwellian speeds that vary sensitively with the identity of the salts and surfactants in solution. The excess helium kinetic energies teach us about the interfacial morphologies of surfactant-salt-water solutions\, which we can explain using two beautiful chemical concepts: the principle of detailed balance and potentials of mean force. We can use what we have learned to discuss how charged surfactants can significantly alter the outcome of reactions in sea spray because they control the segregation of reactive ions to the surface. Just a speck of surfactant goes a long way!\n\nThis talk will include some fun hands-on soapy water activities at your seat. Please bring your water bottle if you have one.
UID:139893-21886296@events.umich.edu
URL:https://events.umich.edu/event/139893
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Chemistry
LOCATION:Chemistry Dow Lab - 1640
CONTACT:
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DTSTAMP:20260119T105042
DTSTART;TZID=America/Detroit:20260209T160000
DTEND;TZID=America/Detroit:20260209T173000
SUMMARY:Lecture / Discussion:Tracking Accuracy Through the Nose of a Dog
DESCRIPTION:Hélène is currently conducting an ethnographic study in a Californian facility that is at the origin of a new cutting edge “technology” to manage Type 1 diabetes: Diabetic Alert Dogs. In her presentation\, she will investigate how dogs' noses are transformed into “reliable sensors” capable of alerting and giving feedback to human beings about the state of their bodies 20 minutes faster than any machine on the planet. She will explore how this facility is a space where not only new accurate instruments are produced\, but also new definitions of what “accuracy\,” “objectivity\,” “proof\,” and “responsibility” mean that considerably enrich our scientific repertoire and how we engage with machines.
UID:144114-21894682@events.umich.edu
URL:https://events.umich.edu/event/144114
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:History,Medicine,Science
LOCATION:Tisch Hall - 1014
CONTACT:
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