{"id":42084,"date":"2023-05-09T06:10:20","date_gmt":"2023-05-09T06:10:20","guid":{"rendered":"https:\/\/www.hgi-cgs.hr\/?page_id=42084"},"modified":"2023-05-09T06:18:44","modified_gmt":"2023-05-09T06:18:44","slug":"asistentica-ivona-banicek-boravila-na-njemackom-institutu-za-geoznanost-u-potsdamu-gfz","status":"publish","type":"page","link":"https:\/\/www.hgi-cgs.hr\/en\/asistentica-ivona-banicek-boravila-na-njemackom-institutu-za-geoznanost-u-potsdamu-gfz\/","title":{"rendered":"Asistentica Ivona Bani\u010dek boravila na njema\u010dkom institutu za geoznanost u Potsdamu (GFZ)"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.19.1″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_section][et_pb_section fb_built=”1″ fullwidth=”on” _builder_version=”4.16″ custom_padding=”0px||0px|||” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_fullwidth_slider _builder_version=”4.16″ min_height=”112px” height=”400px” custom_margin=”0px||||false|false” custom_padding=”0px||18px||false|false” auto=”on” auto_ignore_hover=”on” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/Br\u010di\u0107_Drvenik02-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban2-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/20190228_094232-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban3-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/Bijele_stijene-Gorski_kotar-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban4-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.16″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban5-scaled.jpg” background_enable_image=”on” locked=”off” global_colors_info=”{}” sticky_transition=”on” theme_builder_area=”post_content”][\/et_pb_slide][\/et_pb_fullwidth_slider][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ custom_padding=”||0px|||” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.16″ global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.20.4″ text_font_size=”32px” header_2_text_color=”#1e5096″ global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

NOVOSTI
<\/strong><\/h2>\n

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Asistentica Ivona Bani\u010dek boravila na njema\u010dkom institutu za geoznanost u Potsdamu (GFZ)<\/em><\/h2>\n

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Od kraja o\u017eujka do kraja travnja 2023. godine asistentica Hrvatskog geolo\u0161kog instituta Ivona Bani\u010dek boravila je na njema\u010dkom istra\u017eiva\u010dkom institutu za geoznanost (eng. German research centre for geosciences GFZ<\/em>) u Potsdamu gdje je izu\u010davala metodu analize lipidnih biomarkera kod dr.sc. Dirk Sachse i dr.sc. Oliver Rach. Lipidni biomarkeri predstavljaju molekularne \u201efosile\u201c, odnosno kemijske otiske klime pohranjene u mastima fotosintetskih organizama. Preciznije re\u010deno, mjere se ukupni n-alkani koji su sveprisutni u marinskim i jezerskim sedimentima te se mogu o\u010duvati tijekom dugih geolo\u0161kih vremenskih razdoblja. Specifi\u010dnost n-alkana je upravo mogu\u0107nost determinacije njihovog vodenog ili terestri\u010dkog izvora \u0161to indicira vegetaciju i okoli\u0161.<\/p>\n

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Slika 1. Izme\u0111u svakog koraka metode potrebno je vi\u0161esatno evaporiranje N2<\/sub> plinom<\/em><\/p>\n

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Metoda uklju\u010duje razdvajanje organske i anorganske komponente na liofilizatoru osu\u0161enog sedimentnog uzorka mje\u0161avinom diklorometana i metanola na 100\u00b0C i 103 bara kori\u0161tenjem Dionex ASE ure\u0111aja (eng. Accelerated solvent extraction system<\/em>). Dobivena organska otopina se zatim separira na tri razli\u010dite frakcije pomo\u0107u ekstrakcije \u010dvrste faze (eng. Solid phase extraction \u2013 SPE<\/em>) i heksana, diklorometana i metanola u razli\u010ditim omjerima. Alifatska frakcija ozna\u010dava interesnu skupinu spojeva iz kojih se dodatno uklanjaju sumpor i nezasi\u0107eni ugljikovodici. Tek onda se uzorci mjere na masenom spektrometru koji sadr\u017ei i plinski kromatograf (GC-MS) za determinaciju ukupnih n-alkana, a zatim i na izotopnom masenom spektrometru s kombiniranim plinskim kromatografom (GC-IRMS). Ukupno 35 uzoraka prikupljenih u sklopu projekta QMAD Hrvatske zaklade za znanost je pripremljeno za analiti\u010dki korak mjerenja na instrumentima. Uzorci su se pokazali potencijalnim te su u fazi analize na GC-IRMS ure\u0111aju.<\/p>\n

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Slika 2. Maseni spektrometar s integriranim plinskim kromatografom<\/em><\/p>\n

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Dobivene rezultate stabilnih izotopa vodika, kisika i ugljika, asistentica \u0107e upotpuniti palinolo\u0161kim, geokemijskim i sedimentolo\u0161kim rezultatima te iskoristiti u svojoj doktorskoj disertaciji \u010dime se vr\u0161i i doprinos kvartarnim istra\u017eivanjima u Hrvatskoj.<\/p>\n

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Slika 3. U\u010deni\u010dki praktikant i asistentica vr\u0161e ekstrakciju \u010dvrste faze<\/em><\/p>\n

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NOVOSTIAsistentica Ivona Bani\u010dek boravila na njema\u010dkom institutu za geoznanost u Potsdamu (GFZ)Od kraja o\u017eujka do kraja travnja 2023. godine asistentica Hrvatskog geolo\u0161kog instituta Ivona Bani\u010dek boravila je na njema\u010dkom istra\u017eiva\u010dkom institutu za geoznanost (eng. German research centre for geosciences GFZ) u Potsdamu gdje je izu\u010davala metodu analize lipidnih biomarkera kod dr.sc. Dirk Sachse i dr.sc. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-42084","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t