<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><!--StartFragment--><div id="zimbraEditorContainer" class="4" style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><div><div style="text-indent: 0px; background-color: #ffffff;" data-mce-style="text-indent: 0px; background-color: #ffffff;"><div align="center" style="color: #000000; font-style: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; font-family: arial, helvetica, sans-serif; font-size: 16px; font-weight: 400;" data-mce-style="color: #000000; font-style: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; font-family: arial, helvetica, sans-serif; font-size: 16px; font-weight: 400;"><img data-mce-src="cid:83a42f6243d6ce6f98242ca802c425259a3eaf05@zimbra" pnsrc="cid:83a42f6243d6ce6f98242ca802c425259a3eaf05@zimbra" width="298" height="65" src="cid:83a42f6243d6ce6f98242ca802c425259a3eaf05@zimbra"><br><span id="DWT815" style="font-family: tahoma, "new york", times, serif;" data-mce-style="font-family: tahoma, 'new york', times, serif;">Seminar</span><span style="font-family: tahoma, 'new york', times, serif;" data-mce-style="font-family: tahoma, 'new york', times, serif;">@IF, Wednesday December 8th 2021 at 11:00, <span style="text-decoration: underline;" data-mce-style="text-decoration: underline;">via Zoom</span></span><br><br><span style="color: #008000; font-size: 16pt;" data-mce-style="color: #008000; font-size: 16pt;"><strong>Mechanics of desiccation and swelling of pollen</strong></span></div><div align="center" style="color: #000000; font-style: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; font-family: arial, helvetica, sans-serif; font-size: 16px; font-weight: 400;" data-mce-style="color: #000000; font-style: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; font-family: arial, helvetica, sans-serif; font-size: 16px; font-weight: 400;"><div align="center"><span style="color: #008000; font-size: 16pt;" data-mce-style="color: #008000; font-size: 16pt;"><strong>Mehanika isušivanja i bubrenja peludi</strong></span></div><span style="font-weight: bold; font-size: 16pt; color: #008000; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-weight: bold; font-size: 16pt; color: #008000; font-family: tahoma, 'new york', times, serif;"><br></span></div><div align="center" style="text-align: center;" data-mce-style="text-align: center;"><span style="font-family: tahoma, 'new york', times, serif; font-size: 16pt;" data-mce-style="font-family: tahoma, 'new york', times, serif; font-size: 16pt;"><strong><span id="page3R_mcid1"><span dir="ltr">dr. sc. Antonio Šiber</span></span> </strong></span></div><div><div><div style="text-align: center;" data-mce-style="text-align: center;"><span style="font-family: tahoma, 'new york', times, serif; font-size: 11pt;" data-mce-style="font-family: tahoma, 'new york', times, serif; font-size: 11pt;"><strong>Institut za fiziku, Zagreb</strong></span></div></div></div></div><div style="text-indent: 0px; background-color: #ffffff;" data-mce-style="text-indent: 0px; background-color: #ffffff;"><br></div><div style="text-indent: 0px; background-color: #ffffff;" data-mce-style="text-indent: 0px; background-color: #ffffff;"><strong>The seminar will only take place online via Zoom!</strong></div><div style="text-indent: 0px; background-color: #ffffff;" data-mce-style="text-indent: 0px; background-color: #ffffff;"><div style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;"><span style="font-family: tahoma, 'new york', times, serif;" data-mce-style="font-family: tahoma, 'new york', times, serif;">Join Zoom Meeting:<span> </span><strong><span class="Object" role="link" id="OBJ_PREFIX_DWT816_com_zimbra_url" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><a target="_blank" href="https://zoom.us/j/99770477560" style="color: #005a95; text-decoration: none; cursor: pointer;" rel="noopener" data-mce-href="https://zoom.us/j/99770477560" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;">https://zoom.us/j/99770477560</a></span></strong></span></div><div style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;"><span style="font-family: tahoma, 'new york', times, serif;" data-mce-style="font-family: tahoma, 'new york', times, serif;">Meeting ID:<span> </span><strong><span class="Object" role="link" id="OBJ_PREFIX_DWT817_com_zimbra_phone" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><a href="callto:997 7047 7560" onclick="window.top.Com_Zimbra_Phone.unsetOnbeforeunload()" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-href="callto:997 7047 7560" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;">997 7047 7560</a></span></strong></span></div></div><div style="text-indent: 0px; background-color: #ffffff;" data-mce-style="text-indent: 0px; background-color: #ffffff;"><br></div><div style="text-indent: 0px; background-color: #ffffff;" data-mce-style="text-indent: 0px; background-color: #ffffff;"><br><div align="justify" style="text-align: justify;" data-mce-style="text-align: justify;"><span style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 10pt; font-style: normal; font-weight: 400; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 10pt; font-style: normal; font-weight: 400; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px;"><span class="markedContent" id="page3R_mcid12"><span dir="ltr" style="font-family: sans-serif;" data-mce-style="font-family: sans-serif;"> </span></span></span><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;"><span style="font-family: sans-serif;">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 apertures play in this process. Depending on the aperture design, desiccation can lead to regular infolding and termination of further loss of moisture, preserving thus the fertilizing potential of the pollen grain. It is necessary that the elasticity and the geometry of the grain fulfill certain conditions, in order that the grain infolds regularly. The evolutionary path of the plant species is thus determined in part also by the mechanical constraints which the pollen grains must obey. On the other hand, an influx of water in the grain leads to its swelling and possible bursting, and this process also depends on the properties of pollen apertures. As apertures typically occur in allergenic pollen grains, the bursting of such grains is important in the context of human health. </span></span></div><div align="justify" style="text-align: justify;" data-mce-style="text-align: justify;"><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;"><span style="font-family: sans-serif;"><br></span></span></div><div align="justify" style="text-align: justify;" data-mce-style="text-align: justify;"><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;"><span style="font-family: sans-serif;">------------------------------</span></span></div><div align="justify" style="text-align: justify;" data-mce-style="text-align: justify;"><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;"><span style="font-family: sans-serif;"><br></span></span></div><div align="justify" style="text-align: justify;" data-mce-style="text-align: justify;"><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;"><span style="font-family: sans-serif;"> Odziv peludnih zrna na promjene vlažnosti u okolini određen je njihovom strukturom koju karakteriziraju mekana područja (aperture) u inače krutoj ljusci. Promjene vlažnosti mogu dovesti do isušivanja zrna i do njihovog umotavanja ili kolapsa, ali i do prekomjernog bubrenja pa čak i pucanja. Elastični model zrna formuliran je i iskorišten da se istraži mehanika umotavanja i bubrenja peludnih zrna te uloge koju u tom procesu igraju aperture. Ovisno o dizajnu apertura isušivanje može dovesti do njihovog regularnog zatvaranja i prestanka daljnjeg gubitka vlage što čuva fertilizacijski potencijal peludnog zrna. No, da bi taj proces uistinu regularno umotao zrno, nužno je da elastičnost i geometrija zrna ispunjavaju određene uvjete. Stoga je evolucijska putanja biljnih vrsta određena i mehaničkim ograničenjima kojima pelud mora udovoljiti. S druge strane, dotok vode u zrno dovodi do njegovog bubrenja pa i mogućeg pucanja, a proces također ovisi o svojstvima peludnih apertura. Kako aperture karakteriziraju i alergenu pelud koju raznosti vjetar, pucanje je takve peludi važno i u kontekstu ljudskog zdravlja.<br></span></span></div><br><span lang="EN-GB" style="font-family: tahoma, "new york", times, serif; font-size: 11pt;" data-mce-style="font-family: tahoma, 'new york', times, serif; font-size: 11pt;"><span id="DWT704"><span id="DWT713"><span id="DWT819">Seminar</span> </span></span></span><span style="color: #000000; font-style: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; font-family: tahoma, 'new york', times, serif; font-size: 11pt;" data-mce-style="color: #000000; font-style: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; font-family: tahoma, 'new york', times, serif; font-size: 11pt;"><span lang="EN-GB">hosts: <span class="Object" id="OBJ_PREFIX_DWT1009_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT53_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT114_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT705_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT714_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT8510_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" role="link" id="OBJ_PREFIX_DWT820_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><a href="mailto:balog@ifs.hr" rel="nofollow%20noopener%20noreferrer%20nofollow%20noopener%20noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer" target="_blank" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-href="mailto:balog@ifs.hr" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;">Neven Šantić</a></span></span></span></span></span></span></span>i <span class="Object" id="OBJ_PREFIX_DWT1010_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT54_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT115_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT706_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT715_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" id="OBJ_PREFIX_DWT8511_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><span class="Object" role="link" id="OBJ_PREFIX_DWT821_ZmEmailObjectHandler" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><a href="mailto:ddominko@ifs.hr" rel="nofollow%20noopener%20noreferrer%20nofollow%20noopener%20noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer" target="_blank" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-href="mailto:ddominko@ifs.hr" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;">Damir Dominko</a></span></span></span></span></span></span></span></span></span><br><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">________________________________________________________________________________</span><br></div><br style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;"><div style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; background-color: #ffffff;"><br></div></div></div><div style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">--</span><br><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">Dr.sc. Neven Šantić</span><br><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">Institute of Physics</span><br><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">Bijenička cesta 46, 10000 Zagreb, Croatia</span><br><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">phone:<span> </span><span class="Object" role="link" id="OBJ_PREFIX_DWT826_com_zimbra_phone" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><a href="callto:+385 1 469 8865" onclick="window.top.Com_Zimbra_Phone.unsetOnbeforeunload()" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-href="callto:+385 1 469 8865" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;">+385 1 469 8865</a></span></span><br><span style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;" data-mce-style="font-size: 11pt; font-family: tahoma, 'new york', times, serif;">web:<span> </span><span class="Object" role="link" id="OBJ_PREFIX_DWT827_com_zimbra_url" style="color: #005a95; text-decoration: none; cursor: pointer;" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;"><a target="_blank" href="http://cold.ifs.hr/" style="color: #005a95; text-decoration: none; cursor: pointer;" rel="noopener" data-mce-href="http://cold.ifs.hr/" data-mce-style="color: #005a95; text-decoration: none; cursor: pointer;">http://cold.ifs.hr</a></span></span></div><!--EndFragment--><div style="clear: both;" data-mce-style="clear: both;"><br data-mce-bogus="1"></div></div></body></html>