{"id":41365,"date":"2014-04-23T08:10:00","date_gmt":"2014-04-23T08:10:00","guid":{"rendered":"https:\/\/matis.is\/?p=41365"},"modified":"2021-08-03T08:11:40","modified_gmt":"2021-08-03T08:11:40","slug":"langvarandi-geymsla-fisks-hefur-mest-ahrif-a-gaedi-fjolomettadra-fitusyra","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/frettir\/langvarandi-geymsla-fisks-hefur-mest-ahrif-a-gaedi-fjolomettadra-fitusyra\/","title":{"rendered":"Prolonged storage of fish has the greatest impact on the quality of polyunsaturated fatty acids"},"content":{"rendered":"<h4 class=\"wp-block-heading\">Magnea Gu\u00f0r\u00fan Karlsd\u00f3ttir, a food scientist, defended her doctoral dissertation, Oxidation processes and the stability of frozen seafood, in the Celebration Hall of the University of Iceland on 21.3. The opponents were dr. Santiago Aubourg professor at CSIC in Spain, and dr. Sigr\u00ed\u00f0ur J\u00f3nsd\u00f3ttir researcher at the University of Iceland. Supervisors were dr. H\u00f6r\u00f0ur G. Kristinsson and exam. Sigurj\u00f3n Arason.<\/h4>\n\n\n\n<p>Neysla \u00e1 unnum og frystum sj\u00e1varafur\u00f0um hefur aukist \u00e1 undanf\u00f6rnum \u00e1rum. Fita \u00ed fiskafur\u00f0um er g\u00f3\u00f0 uppspretta af fj\u00f6l\u00f3mettu\u00f0um fitus\u00fdrum (PUFA) sem s\u00fdnt hefur veri\u00f0 fram \u00e1 a\u00f0 hafa j\u00e1kv\u00e6\u00f0 \u00e1hrif \u00e1 heilsu manna. Fiskafur\u00f0ir me\u00f0 h\u00e1tt hlutfall af PUFA eru einstaklega vi\u00f0kv\u00e6mar gagnvart \u00fer\u00e1nun. Var\u00f0veisla \u00e1 g\u00e6\u00f0um fitu er \u00fev\u00ed mikilv\u00e6g vi\u00f0 geymslu og vinnslu sj\u00e1varafur\u00f0a. Frysting og frostgeymsla er skilvirk a\u00f0fer\u00f0 til a\u00f0 lengja geymslu\u00feol fiskafur\u00f0a, og hefur veri\u00f0 beitt \u00ed fj\u00f6lda \u00e1ra. Engu a\u00f0 s\u00ed\u00f0ur geta g\u00e6\u00f0i afur\u00f0anna r\u00fdrna\u00f0 \u00ed frostgeymslu. Verkefninu var \u00e6tla\u00f0 a\u00f0 auka skilning \u00e1 mismunandi oxunarferlum sem eiga s\u00e9r sta\u00f0 \u00ed frystum fiskafur\u00f0um, og kanna st\u00f6\u00f0ugleika \u00f3l\u00edkra fisktegunda vi\u00f0 langvarandi frostgeymslu. Ranns\u00f6ku\u00f0 voru \u00e1hrif mismunandi geymsluhita \u00e1 hr\u00e1efnisg\u00e6\u00f0i og st\u00f6\u00f0ugleika fiskafur\u00f0a, og \u00e1hrif hitunar og \u00e1framhaldandi frostgeymslu elda\u00f0ra afur\u00f0a \u00e1 g\u00e6\u00f0i fitunnar. Ennfremur var lagt mat \u00e1 \u00fdmsar <a href=\"https:\/\/matis.is\/en\/frettir\/samstarfssamningur-matis-og-als-i-svithjod\/\">chemical measurements<\/a> og hra\u00f0virkar m\u00e6lingar sem gjarnan er beitt til \u00feess a\u00f0 fylgjast eftir me\u00f0 ni\u00f0urbroti fitu.<br><br>The research of the project led to a clear deeper understanding of the different processes of oxidation and stability of frozen seafood and how different storage conditions and variability of raw materials affect these processes. Temperature and storage time proved to be very important factors for the stability of frozen products. The quality and stability of the fat in the cold store is very dependent on fish species. Prolonged pre-cooking storage also has the greatest effect on post-cooking fat stability.<br><br>Magnea Gu\u00f0r\u00fan was born in 1978. She graduated with a BS degree in food science from the University of Iceland in 2008 and an MSc degree in food science in 2010. In addition to her studies, Magnea has worked for Mat\u00eds ohf. and carried out various research projects.<br><br>Magnea&#039;s parents are Karl J\u00f3hann Valdimarsson and Erla \u00de\u00f3ra \u00d3skarsd\u00f3ttir. Magneu&#039;s husband is Ingvar J\u00fal\u00edus Tryggvason and their children are \u00c1str\u00f3s, Erla \u00d3sk, Eva Mar\u00eda and Tryggvi.<br><br>For further information&nbsp;<a href=\"https:\/\/gamla.matis.is\/matis\/mannaudur\/starfsfolk-og-simanumer\/persona\/96\/fyrirtaeki\/1\">Magnea Gu\u00f0r\u00fan Karlsd\u00f3ttir<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Magnea Gu\u00f0r\u00fan Karlsd\u00f3ttir matv\u00e6lafr\u00e6\u00f0ingur var\u00f0i doktorsritger\u00f0 s\u00edna, Oxunarferlar og st\u00f6\u00f0ugleiki frosinna sj\u00e1varafur\u00f0a, \u00ed H\u00e1t\u00ed\u00f0arsal H\u00cd \u00feann 21.3. sl.. Andm\u00e6lendur voru [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":41366,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"templates\/template-cover.php","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1973],"tags":[],"class_list":["post-41365","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-frettir"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Langvarandi geymsla fisks hefur mest \u00e1hrif \u00e1 g\u00e6\u00f0i fj\u00f6l\u00f3metta\u00f0ra fitus\u00fdra - Mat\u00eds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/matis.is\/en\/frettir\/langvarandi-geymsla-fisks-hefur-mest-ahrif-a-gaedi-fjolomettadra-fitusyra\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Langvarandi geymsla fisks hefur mest \u00e1hrif \u00e1 g\u00e6\u00f0i fj\u00f6l\u00f3metta\u00f0ra fitus\u00fdra - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Magnea Gu\u00f0r\u00fan Karlsd\u00f3ttir matv\u00e6lafr\u00e6\u00f0ingur var\u00f0i doktorsritger\u00f0 s\u00edna, Oxunarferlar og st\u00f6\u00f0ugleiki frosinna sj\u00e1varafur\u00f0a, \u00ed H\u00e1t\u00ed\u00f0arsal H\u00cd \u00feann 21.3. sl.. 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