Effect of storage conditions on lipid oxidation, nutrient loss and colour of dried seaweeds, Porphyra umbilicalis and Ulva fenestrata, subjected to different pretreatments

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Harrysson, Hanna,1987Chalmers tekniska högskola,Chalmers University of Technology (författare)

Here we evaluated the levels of lipid oxidation products, fatty acids, ascorbic acid and colour of Porphyra and Ulva after oven-drying at 40 degrees C, and during subsequent storage for >= 370 days under light, semi-light and dark conditions. Part of the seaweed was pre-soaked in freshwater or pre-coated with a whey protein mixture. Controls consisted of freeze-dried seaweeds. Throughout storage there was a moderate development of the lipid oxidation-derived aldehydes, malondialdehyde, 4-hydroxy-trans-2-hexenal and 4-hydroxy-trans-2-nonenal, while there was a great loss of unsaturated fatty acids and ascorbic acid. Light storage and freeze-drying stimulated the fatty acid loss as well as pigment bleaching, seen as increased a*-values. For Ulva, the coating reduced malondialdehyde, 4-hydroxy-trans-2-hexenal and 4-hydroxy-trans-2-nonenal formation during drying and slightly prevented loss of polyunsaturated fatty acids during light storage. Pre-soaking in freshwater had no effect on the seaweed stability, although it reduced the ash content and thereby increased the relative content of ascorbic acid and fatty acids of the biomasses.

LANTBRUKSVETENSKAPER Bioteknologi med applikationer på växter och djur hsv//swe
AGRICULTURAL SCIENCES Agricultural Biotechnology hsv//eng
TEKNIK OCH TEKNOLOGIER Annan teknik Livsmedelsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Other Engineering and Technologies Food Engineering hsv//eng
Macroalgae
Drying
Storage
Lipid oxidation
Ascorbic acid
Colour
ascorbic-acid
antioxidant activity
drying treatment
laver porphyra
whey proteins
chlorophyll
extracts
coatings
films
oil
Biotechnology & Applied Microbiology
Ascorbic acid

Krook, J. L.Chalmers tekniska högskola,Chalmers University of Technology (författare)
Larsson, Karin,1979Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)karinsve (författare)
Tullberg, Cecilia,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)cectul (författare)
Oerbekke, AnnelousGothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper, Tjärnö marinlaboratoriet,Department of marine sciences, Tjärnö Marine Laboratory,University of Gothenburg(Swepub:gu)xoeran (författare)
Toth, Gunilla,1973Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper, Tjärnö marinlaboratoriet,Department of marine sciences, Tjärnö Marine Laboratory,University of Gothenburg(Swepub:gu)xtotgu (författare)
Pavia, Henrik,1964Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper, Tjärnö marinlaboratoriet,Department of marine sciences, Tjärnö Marine Laboratory,University of Gothenburg(Swepub:gu)xpavhe (författare)
Undeland, Ingrid,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)undeland (författare)
Chalmers tekniska högskolaInstitutionen för marina vetenskaper, Tjärnö marinlaboratoriet (creator_code:org_t)

Av författaren/redakt...: Harrysson, Hanna ...; Krook, J. L.; Larsson, Karin, ...; Tullberg, Cecili ...; Oerbekke, Annelo ...; Toth, Gunilla, 1 ...; visa fler...; Pavia, Henrik, 1 ...; Undeland, Ingrid ...; visa färre...

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