{"id":6086,"date":"2026-10-19T09:48:27","date_gmt":"2026-10-19T09:48:27","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-lifefnafraedi-kristinn-ragnar-oskarsson\/"},"modified":"2026-10-19T09:48:27","modified_gmt":"2026-10-19T09:48:27","slug":"doktorsvorn-i-lifefnafraedi-kristinn-ragnar-oskarsson","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-lifefnafraedi-kristinn-ragnar-oskarsson\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edfefnafr\u00e6\u00f0i – Kristinn Ragnar \u00d3skarsson"},"content":{"rendered":"
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Streymi:\u00a0 https:\/\/www.youtube.com\/user\/HIvarp\/live<\/a><\/p>\n

Doktorsefni:<\/strong> Kristinn Ragnar \u00d3skarsson<\/p>\n

Heiti ritger\u00f0ar:<\/strong> Hra\u00f0afr\u00e6\u00f0ilegur st\u00f6\u00f0ugleiki og hitastigsa\u00f0l\u00f6gun. Ranns\u00f3knir \u00e1 kuldaa\u00f0l\u00f6gu\u00f0um subtil\u00edsin-l\u00edkum ser\u00edn pr\u00f3teasa. (Kinetic stability and temperature adaptation. Observations from a cold adapted subtilisin-like serine protease)<\/p>\n

Andm\u00e6lendur:<\/strong>
Dr. Jose Manuel Sanchez-Ruiz, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00ed Granada, Sp\u00e1ni
Dr. Tony Collins, lektor vi\u00f0 H\u00e1sk\u00f3lann \u00ed Minho, Port\u00fagal<\/p>\n

Lei\u00f0beinandi:<\/strong> Dr. Magn\u00fas M\u00e1r Kristj\u00e1nsson, pr\u00f3fessor vi\u00f0 Raunv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong>
Dr. Bjarni \u00c1sgeirsson, pr\u00f3fessor vi\u00f0 Raunv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands
Dr. Elena Papaleo, d\u00f3sent vi\u00f0 Kaupmannahafnarh\u00e1sk\u00f3la.<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong> Dr. Einar \u00d6rn Sveinbj\u00f6rnsson, pr\u00f3fessor og deildarforseti Raunv\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands<\/p>\n

\u00c1grip<\/strong>
Til ranns\u00f3kna \u00e1 st\u00f6\u00f0ugleika og hitastigsa\u00f0l\u00f6gun pr\u00f3teina hefur veri\u00f0 n\u00fdtt ranns\u00f3knarl\u00edkan sem samanstendur af VPR, kuldaa\u00f0l\u00f6gu\u00f0um subtil\u00edsin-l\u00edkum ser\u00edn pr\u00f3teinasa og AQUI, hitast\u00f6\u00f0ugum subtil\u00edsin-l\u00edkum ser\u00edn pr\u00f3teinasa. \u00deessi tv\u00f6 ens\u00edm hafa samsvarandi \u00feri\u00f0ja stigs byggingu og henta \u00fev\u00ed einstaklega vel til samanbur\u00f0arranns\u00f3kna \u00e1 hitastigsa\u00f0l\u00f6gun.
R\u00e6ddar ver\u00f0a ni\u00f0urst\u00f6\u00f0ur ranns\u00f3kna um \u00e1hrif kals\u00edumj\u00f3na \u00e1 st\u00f6\u00f0ugleika, \u00e1hrif pr\u00f3l\u00edninnsetninga \u00ed lykkjusv\u00e6\u00f0um \u00e1 st\u00f6\u00f0ugleika, mikilv\u00e6gi N-endast\u00e6\u00f0ar tr\u00fdpt\u00f3fan-am\u00edn\u00f3s\u00fdru fyrir byggingu pr\u00f3teinsins og jafnframt mun mikilv\u00e6gi N-endans sj\u00e1lfs fyrir st\u00f6\u00f0ugleika ver\u00f0a r\u00e6dd.
L\u00edkani\u00f0 sem sett er fram fyrir VPR s\u00fdnir byggingu sem er mj\u00f6g samheldin og afmyndast sem ein heild. En \u00feessa samheldni byggingarinnar er h\u00e6gt a\u00f0 trufla, til d\u00e6mis me\u00f0 \u00fev\u00ed a\u00f0 sker\u00f0a kals\u00edumbindingu, e\u00f0a me\u00f0 st\u00f6kkbreytingum sem hafa \u00e1hrif \u00e1 hvernig N-endi pr\u00f3teinsins hefur \u00e1hrif \u00e1 a\u00f0ra hluta af byggingunni.
Sumir \u00feessara innansameindakrafta geta veri\u00f0 styrktir me\u00f0 pr\u00f3l\u00edn-st\u00f6kkbreytingum, sem vir\u00f0ast virka sem eins konar akkeri sem skor\u00f0a lykkjusv\u00e6\u00f0i og vi\u00f0halda r\u00e9ttum sameindahrifum vi\u00f0 h\u00e6rri hitastig.
Ni\u00f0urst\u00f6\u00f0ur okkar veita d\u00fdpri s\u00fdn \u00e1 eiginleika hra\u00f0afr\u00e6\u00f0ilegar st\u00f6\u00f0gunar, \u00e1hrifa samheldinna afmyndunarferla \u00e1 st\u00f6\u00f0ugleika, hvernig pr\u00f3l\u00edn-am\u00edn\u00f3s\u00fdrur hafa \u00e1hrif \u00e1 sameindahrif milli fjarl\u00e6gra sv\u00e6\u00f0a innan pr\u00f3tein-byggingarinnar og hvernig kals\u00edumbinding \u00e1 mismunandi bindisv\u00e6\u00f0i hefur \u00e1hrif \u00e1 mismunandi eiginleika pr\u00f3teinanna.<\/p>\n

Um doktorsefni\u00f0<\/strong>
Kristinn Ragnar \u00d3skarsson h\u00f3f n\u00e1m \u00ed l\u00edfefnafr\u00e6\u00f0i vi\u00f0 Raunv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands hausti\u00f0 2010 og lauk BSc gr\u00e1\u00f0u vori\u00f0 2013. Sama \u00e1r h\u00f3f hann n\u00e1m til meistaragr\u00e1\u00f0u \u00ed l\u00edfefnafr\u00e6\u00f0i sem hann lauk vori\u00f0 2015. Hausti\u00f0 2015 h\u00f3fst vinna vi\u00f0 doktorsverkefni \u00ed l\u00edfefnafr\u00e6\u00f0i sem hann hefur unni\u00f0 undir handlei\u00f0slu Magn\u00fasar M\u00e1s Kristj\u00e1nssonar, pr\u00f3fessors vi\u00f0 Raunv\u00edsindadeild.\u2003<\/p>\n<\/div><\/div>","protected":false},"featured_media":1808,"template":"","meta":{"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":"","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-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":"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":""},"mobile":{"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":""}},"_phd_date_start":"2020-10-02T13:00:00+00:00","_phd_date_end":"2020-10-02T15:00:00+00:00","_phd_location":"Ver\u00f6ld - H\u00fas Vigd\u00edsar Stofa 023","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Hra\u00f0afr\u00e6\u00f0ilegur st\u00f6\u00f0ugleiki og hitastigsa\u00f0l\u00f6gun. 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