{"id":6011,"date":"2026-10-19T09:48:22","date_gmt":"2026-10-19T09:48:22","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-matvaelafraedi-hildur-inga-sveinsdottir\/"},"modified":"2026-10-19T09:48:22","modified_gmt":"2026-10-19T09:48:22","slug":"doktorsvorn-i-matvaelafraedi-hildur-inga-sveinsdottir","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-matvaelafraedi-hildur-inga-sveinsdottir\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed matv\u00e6lafr\u00e6\u00f0i – Hildur Inga Sveinsd\u00f3ttir"},"content":{"rendered":"
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Fimmtudaginn 30. apr\u00edl ver Hildur Inga Sveinsd\u00f3ttir doktorsritger\u00f0 s\u00edna \u00ed matv\u00e6lafr\u00e6\u00f0i vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands. V\u00f6rninni ver\u00f0ur streymt:\u00a0https:\/\/livestream.com\/hi\/hilduringasveinsdottir<\/a><\/p>\n

Ritger\u00f0in ber heiti\u00f0:\u00a0Vir\u00f0isaukning \u00ed vinnslu Atlantshafsmakr\u00edlflaka (Scomber scombrus) – Ranns\u00f3kn \u00e1 geymslu\u00feoli, efna- og vinnslueiginleikum makr\u00edls sem veiddur er vi\u00f0 \u00cdslandsstrendur. Value addition from Atlantic mackerel (Scomber scombrus) fillets – Study of shelf life, chemical properties and processability of mackerel caught in Icelandic waters.<\/strong><\/p>\n

Andm\u00e6lendur eru dr. Heidi Nilsen, ranns\u00f3knastj\u00f3ri vi\u00f0 Research Nofima, Noregi, og dr. Hj\u00f6rleifur Einarsson, pr\u00f3fessor og deildarforma\u00f0ur au\u00f0lindadeildar vi\u00f0 H\u00e1sk\u00f3lann \u00e1 Akureyri.<\/p>\n

Lei\u00f0beinendur og umsj\u00f3narkennarar voru dr. Sigurj\u00f3n Arason, pr\u00f3fessor vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild, dr. Mar\u00eda Gu\u00f0j\u00f3nsd\u00f3ttir, pr\u00f3fessor vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild, og dr. Magnea Gu\u00f0r\u00fan Karlsd\u00f3ttir, Mat\u00eds.\u00a0<\/p>\n

\u00d3l\u00f6f Gu\u00f0n\u00fd Geirsd\u00f3ttir, pr\u00f3fessor og forseti Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideildar, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0asal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 12:30.<\/p>\n

About database<\/strong><\/p>\n

Verkefni\u00f0 var unni\u00f0 \u00ed g\u00f3\u00f0u samstarfi milli H\u00e1sk\u00f3la \u00cdslands, Mat\u00eds, S\u00edldarvinnslunnar og \u00cdsf\u00e9lags Vestmannaeyja. \u00dea\u00f0 var styrkt af T\u00e6kni\u00fer\u00f3unarsj\u00f3\u00f0i Rann\u00eds, AVS og Norr\u00e6na I\u00f0n\u00fer\u00f3unarsj\u00f3\u00f0num. \u00cd doktorsnefnd verkefnis sitja lei\u00f0beinendur, pr\u00f3fessor Mar\u00eda Gu\u00f0j\u00f3nsd\u00f3ttir og pr\u00f3fessor Sigurj\u00f3n Arason, \u00e1samt Magneu G. Karlsd\u00f3ttur, a\u00f0junkt vi\u00f0 H\u00e1sk\u00f3la \u00cdslands, og dr. Turid Rustad, pr\u00f3fessor vi\u00f0 NTNU \u00ed Noregi.<\/p>\n

\u00c1grip<\/strong><\/p>\n

Markmi\u00f0 verkefnisins var a\u00f0 meta m\u00f6guleika \u00e1 vinnslu flaka \u00far Atlantshafsmakr\u00edl (Scomber scombrus) sem vei\u00f0ist vi\u00f0 \u00cdslandsstrendur. \u00c1 \u00feeim \u00e1rst\u00edma sem hann finnst h\u00e9r er hold hans vi\u00f0kv\u00e6mt fyrir me\u00f0h\u00f6ndlun og \u00fer\u00e1nar au\u00f0veldlega. L\u00f6g\u00f0 var \u00e1hersla \u00e1 a\u00f0 meta \u00e1hrif \u00fer\u00e1avarnarefna og p\u00f6kkunarlausna \u00e1 geymslu\u00feol v\u00e9lflaka\u00f0s makr\u00edls. Einnig a\u00f0 meta \u00e1hrif l\u00edffr\u00e6\u00f0ilegrar sta\u00f0setningar v\u00f6\u00f0va, lj\u00f3ss og d\u00f6kks, \u00e1 st\u00f6\u00f0ugleika hans og m\u00f6guleika \u00e1 a\u00f0 ro\u00f0skera fl\u00f6kin.<\/p>\n

Ni\u00f0urst\u00f6\u00f0ur verkefnisins s\u00fdndu a\u00f0 makr\u00edll sem veiddur er vi\u00f0 \u00cdsland er n\u00e6ringarr\u00edkur matur og hr\u00e1efni sem vel er h\u00e6gt a\u00f0 v\u00e9lflaka til vir\u00f0isaukningar, s\u00e9 huga\u00f0 vel a\u00f0 k\u00e6lingu og r\u00e9ttri me\u00f0h\u00f6ndlun. Aftur \u00e1 m\u00f3ti er geymslu\u00feol lausfrystra flaka stutt og \u00fev\u00ed mikilv\u00e6gt a\u00f0 n\u00fdta p\u00f6kkunarlausnir e\u00f0a \u00fer\u00e1avarnarefni til a\u00f0 auka st\u00f6\u00f0ugleika v\u00f6runnar.<\/p>\n

Vi\u00f0 mat \u00e1 st\u00f6\u00f0ugleika v\u00f6knu\u00f0u spurningar um samsetningu v\u00f6\u00f0va makr\u00edls eftir sta\u00f0setningu \u00e1 flakinu. M\u00e6lingar s\u00fdndu a\u00f0 hluti \u00feess d\u00f6kka v\u00f6\u00f0va sem er a\u00f0 finna \u00e1 flaki voru vi\u00f0kv\u00e6mari fyrir fituskemmdum. \u00deessir hlutar flaksins eru undir ro\u00f0inu. Me\u00f0 ro\u00f0skur\u00f0i var m\u00f6gulegt a\u00f0 fjarl\u00e6gja \u00feennan vi\u00f0kv\u00e6ma hluta flakanna \u00e1n \u00feess a\u00f0 hafa \u00e1hrif \u00e1 \u00fatlit \u00feeirra og framlei\u00f0a \u00feannig ro\u00f0laus makr\u00edlfl\u00f6k.<\/p>\n

Abstract<\/strong><\/p>\n

The aim of the project was to evaluate the possibilities of processing Atlantic mackere (Scomber scombrus) caught around Iceland into fillets. At the time of year the mackerel is found around Iceland it is sensitive towards handling and rancidity. The effect of antioxidants and packaging solutions on the shelf life og mechanically filleted mackerel was evaluated. Furthermore, effect of anatomical position of muscle, light and dark, on the stability and possibility of deep-skinning the fillets.<\/p>\n

The results showed that mackerel is a nutritionally valuable product and raw material that can be processed into fillets providing suitable chilling and handling practices. However, the shelf life og individually quick frozen (IQF) fillets was short, therefore it is important to use packaging solutions or antioxidants to increase the product\u2018s stability.<\/p>\n

During evaluation og shelf life questions arose regarding the effect of muscle composition and anatomical position on the fillet. Results showed that part of the dark muscle on the fillet was more susceptible to lipid degredation. This was the subcutaneous dark muscle. Using deep skinning this sensitive part of the fillet could be removed without affecting their visual quality, producing skinless mackerel fillets.<\/p>\n

Um doktorsefni\u00f0<\/strong><\/p>\n

Hildur Inga Sveinsd\u00f3ttir er f\u00e6dd 1991. H\u00fan lauk BS- og MS-pr\u00f3fi \u00ed matv\u00e6lafr\u00e6\u00f0i fr\u00e1 H\u00e1sk\u00f3la \u00cdslands 2015 og 2016. \u00c1ri seinna, 2017, innrita\u00f0ist h\u00fan \u00ed doktorsn\u00e1m vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild. Samhli\u00f0a doktorsn\u00e1minu starfa\u00f0i Hildur vi\u00f0 ranns\u00f3knir hj\u00e1 Mat\u00eds ohf. og var stundakennari vi\u00f0 H\u00e1sk\u00f3la \u00cdslands. Hildur er \u00ed samb\u00fa\u00f0 me\u00f0 Brynjari Birgissyni og foreldrar hennar eru Lilja Sigr\u00fan J\u00f3nsd\u00f3ttir og Sveinn V\u00edkingur \u00c1rnason.<\/p>\n<\/div><\/div>","protected":false},"featured_media":1247,"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":"2020-04-30T12:30:00+00:00","_phd_date_end":"2020-04-30T15:30:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur\/streymi","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Vir\u00f0isaukning \u00ed vinnslu Atlantshafsmakr\u00edlflaka (Scomber scombrus) - Ranns\u00f3kn \u00e1 geymslu\u00feoli, efna- og vinnslueiginleikum makr\u00edls sem veiddur er vi\u00f0 \u00cdslandsstrendur. 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