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PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Biomineralization from atom to atoll
DTSTART:20130409T161500
DTEND:20130409T171500
DTSTAMP:20260510T131926Z
UID:c6c4a68eab1b60f56be068249b6c2ffb893db10c50f5158c06af3b01
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Jaroslaw Stolarski\, Head of Department of Biogeology\, Ins
 titute of Paleobiology\, Polish Academy of Sciences\, Warsaw\, PL\nBiomine
 ralization refers to the processes by which organisms form the mineral ske
 leton or deposit mineral structures whose formation is directly linked wit
 h their physiological activity. Different types of biominerals have been r
 ecognized in various organisms\, among them calcium carbonate\, calcium ph
 osphate and siliceous structures are the most widespread in nature. Reef-b
 uilding scleractinian corals belong to the most extensive natural producer
 s of CaCO3. Various physico-chemical properties of scleractinian coral ske
 leton are\, from the macroscopic down to the atomic length scales\, influe
 nced by organic macromolecules present in biomineralization region. One of
  the goals of this presentation will be to show biological control on hier
 archical structure of the skeleton. On the other hand\, formation of the s
 keleton is influenced also by environmental factors\, thus skeletons of va
 rious organisms are used as proxies for (paleo)environmental reconstructio
 ns. Various state-of-the art analytical techniques are applied to retrieve
  those information but some geochemists use such archives without deeper r
 eflection on biological constraints of their formation. Thus the second pu
 rpose of this seminar is to show paradoxes of such simplified geological i
 nterpretations. Focus will be also on the importance of diagenetic factors
  on preservation of both types of information (physiological/environmental
 ) in fossil record
LOCATION:GR A3 32 http://plan.epfl.ch/?room=GR%20A3%2032
STATUS:CONFIRMED
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