BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:Europe/Rome BEGIN:STANDARD DTSTART:20231029T020000 RDATE:20240331T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20241027T020000 RDATE:20250330T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20251026T020000 RDATE:20260329T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20261025T020000 RDATE:20270328T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20271031T020000 RDATE:20280326T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20281029T020000 RDATE:20290325T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20291028T020000 RDATE:20300331T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20301027T020000 RDATE:20310330T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:STANDARD DTSTART:20311026T020000 RDATE:20320328T030000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:Europe/Rome CET END:STANDARD BEGIN:DAYLIGHT DTSTART:20230523T170000 RDATE:20231029T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20240331T030000 RDATE:20241027T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20250330T030000 RDATE:20251026T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20260329T030000 RDATE:20261025T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20270328T030000 RDATE:20271031T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20280326T030000 RDATE:20281029T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20290325T030000 RDATE:20291028T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20300331T030000 RDATE:20301027T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20310330T030000 RDATE:20311026T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:Europe/Rome CEST END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:c224a3cedce7a707ad03a6672d178fd7 CATEGORIES:Seminari CREATED:20240520T163129 SUMMARY:"Discovering elements in the age of radioactivity – two contrasting stories" by Annette Lykknes and Brigitte Van Tiggelen DESCRIPTION:The next on-line seminar of the Society for the History of Alchemy and Chem istry will be given by Professor Annette Lykknes (Norwegian University of S cience and Technology) and Dr Brigitte Van Tiggelen (Science History Instit ute) who will present: Discovering elements in the age of radioactivity – t wo contrasting stories\nThis will be live on Thursday, 23 May 2024, beginni ng at 5.00pm BST (6.00pm CEST, 12 noon EST, 9.00am PST). The format will be a talk of 20-30 minutes, followed by a moderated discussion of half an hou r.\n\nAs with recent seminars the Zoom link can be freely accessed by anyon e, member of SHAC or not, by booking through the following Ticket Source li nk:\nhttps://www.ticketsource.co.uk/society-for-the-history-of-alchemy-and- chemistry/t-rpdojdx. (https://www.ticketsource.co.uk/society-for-the-histor y-of-alchemy-and-chemistry/t-rpdojdx) Click or tap if you trust this link." data-saferedirecturl="https://www.google.com/url?q=https://www.ticketsourc e.co.uk/society-for-the-history-of-alchemy-and-chemistry/t-rpdojdx&sour ce=gmail&ust=1716301703715000&usg=AOvVaw1JwhDSkOMjz2Ln4bi0hNrH"> https://www.ticketsource.co. (https://www.ticketsource.co.)uk/society-for-t he-history-of-alchemy-and-chemistry/t-rpdojdx\n\nThe seminar will be also a ccessible live on YouTube at https://youtube.com/live/D1w48_ba2tU. Click or tap if you trust this link." data-saferedirecturl="https://www.google.com/ url?q=https://youtube.com/live/D1w48_ba2tU&source=gmail&ust=1716301 703715000&usg=AOvVaw0n4qqUpdhKhRGFe8BfIUOl">https://youtube.com/live / (https://youtube.com/live/)D1w48_ba2tU\n\nMost previous on-line seminars can be found on the SHAC YouTube Channel:  (https://www.youtube.com/Society forHistoryofAlchemyandChemistry)https://www.youtube.com/ (https://www.youtu be.com/)SocietyforHistoryofAlchemyandChemistry\n\n\nDiscovering elements in the age of radioactivity – two contrasting storiesAnnette Lykknes and Brig itte Van Tiggelen\nIn a forthcoming edited volume on the nature of element discoveries the authors explore the discovery histories of selected chemica l elements. The case studies presented allow to problematize and explore th e unfolding of discoveries, how they are reported and what stage is conside red as the discovery as well as how predictions and assumptions on what cou ld exist shape these processes in scientific and historical practice. In th is talk, we will present two contrasting stories from the context of radioa ctivity research.\nThe first one is what might be considered as well-known discovery histories, namely those of radium and polonium, the very first ne w radioactive elements uncovered by Marie and Pierre Curie. But the new rad ioactive elements proposed by the Curies had not even been separated from t he mineral fractions in which they were detected, and the main means of the ir identification was neither the balance nor the spectroscope which were t he accepted ways of detecting elements but rather their characteristic and unique radioactivity.\nThe second story looks at retrospective assessment a nd assignment of elemental discoveries, focusing on four claimed instances of element 43, before it was produced by nuclear means with a cyclotron and acknowledged by IUPAC and the chemical community as technetium in 1947. Go ing back in time, historians and scientists identify several “precursors” o f technetium and a closer look at masurium, nihonium, davyum and ilmenium p rovide an opportunity to reflect further on the nature of discovery by taki ng into account the context of narration.\n X-ALT-DESC;FMTTYPE=text/html:
The next on-line seminar of the Society for the History of Alchemy and Chemistry will be given by Professor Annette Lykknes (Norwegian University of Science and Technology) and Dr Brigitte Van Tiggelen (Science History I nstitute) who will present:
 

Discovering elemen ts in the age of radioactivity – two contrasting stories


T his will be live on Thursday, 23 May 2024, beginning at 5.00pm BST (6.00pm CEST, 12 noon EST, 9.00am PST). The format will be a talk of 20-30 minutes, followed by a moderated discussion of half an hour.


As with re cent seminars the Zoom link can be freely accessed by anyone, member of SHA C or not, by booking through the following Ticket Source link:

https://www.ticketsource.co.uk/society -for-the-history-of-alchemy-and-chemistry/t-rpdojdx. Click or tap if yo u trust this link." data-saferedirecturl="https://www.google.com/url?q=http s://www.ticketsource.co.uk/society-for-the-history-of-alchemy-and-chemistry /t-rpdojdx&source=gmail&ust=1716301703715000&usg=AOvVaw1JwhDSkO Mjz2Ln4bi0hNrH">https://www.ticketsource.co.uk/society-for-the-his tory-of-alchemy-and-chemistry/t-rpdojdx

The seminar will be also accessible live on YouTube at https://youtube.co m/live/D1w48_ba2tU. Click or tap if you trust this link." data-saferedi recturl="https://www.google.com/url?q=https://youtube.com/live/D1w48_ba2tU& amp;source=gmail&ust=1716301703715000&usg=AOvVaw0n4qqUpdhKhRGFe8BfI UOl"> https://youtube.com/live/D1w48_ba2tU

Most prev ious on-line seminars can be found on the SHAC YouTube Channel: https://www. youtube.com/SocietyforHistoryofAlchemyandChemistry

Discovering elements in the age of radioactivity – t wo contrasting stories

Annette Lykknes and Brigitte Van Tiggelen

In a forthcoming edited volume on the nature of element discoveries the authors explore the discovery histories of selected chemical elements. The case studies presented allow to problematize and explore the unfolding of discoveries, how they are reported and what stage is considered as the d iscovery as well as how predictions and assumptions on what could exist sha pe these processes in scientific and historical practice. In this talk, we will present two contrasting stories from the context of radioactivity rese arch.

The first one is what might be considered as well-known discove ry histories, namely those of radium and polonium, the very first new radio active elements uncovered by Marie and Pierre Curie. But the new radioactiv e elements proposed by the Curies had not even been separated from the mine ral fractions in which they were detected, and the main means of their iden tification was neither the balance nor the spectroscope which were the acce pted ways of detecting elements but rather their characteristic and unique radioactivity.

The second story looks at retrospective assessment and assignment of elemental discoveries, focusing on four claimed instances of element 43, before it was produced by nuclear means with a cyclotron and a cknowledged by IUPAC and the chemical community as technetium in 1947. Goin g back in time, historians and scientists identify several “precursors” of technetium and a closer look at masurium, nihonium, davyum and ilmenium pro vide an opportunity to reflect further on the nature of discovery by taking into account the context of narration.

DTSTAMP:20260824T061737 DTSTART;TZID=Europe/Rome:20240523T170000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR