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dc.contributor.author
Canelli, Greta
dc.contributor.author
Tarnutzer, Carmen
dc.contributor.author
Carpine, Roberta
dc.contributor.author
Neutsch, Lukas
dc.contributor.author
Bolten, Christoph J.
dc.contributor.author
Dionisi, Fabiola
dc.contributor.author
Mathys, Alexander
dc.date.accessioned
2020-11-13T08:25:01Z
dc.date.available
2020-09-03T17:15:15Z
dc.date.available
2020-09-04T12:33:30Z
dc.date.available
2020-09-21T07:28:07Z
dc.date.available
2020-11-13T08:25:01Z
dc.date.issued
2020-09
dc.identifier.other
10.3389/fnut.2020.565996
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/438398
dc.identifier.doi
10.3929/ethz-b-000438398
dc.description.abstract
Microalgae are a source of potentially healthy and sustainable nutrients. However, the bioaccessibility of these nutrients remains uncertain. In this study, we analyzed the biomass composition of five commercial Chlorella and Auxenochlorella strains, and Chlorella vulgaris heterotrophically cultivated in our laboratory. Protein accounted for 65% ± 3% (w w-1) dry matter (DM) in all biomasses, except for the lab-grown C. vulgaris that contained 20% (w w-1) DM protein. The lipid content was comparable and ranged between 7%–10% (w w-1) DM. Most of the biomasses had a ω6-polyunsaturated fatty acids (PUFAs)/ω3-PUFAs ratio < 4, as recommended by nutritional experts. A recently published harmonized protocol for in vitro digestion was used to evaluate lipid and protein bioaccessibility. Protein bioaccessibility ranged between 60%–74% for commercial Chlorella and Auxenochlorella biomasses and was 43% for the lab-grown C. vulgaris. Lipid bioaccessibility was < 7% in commercial biomasses and 19% in the lab-grown C. vulgaris. Taken together, the results show that microalgae are promising sources of bioaccessible protein. The limited lipid bioaccessibility indicates the need for alternative upstream and downstream production strategies.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers Media
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Microalgae
en_US
dc.subject
Chlorella
en_US
dc.subject
Auxenochlorella
en_US
dc.subject
Bioaccessibility
en_US
dc.subject
Omega-3-polyunsaturated fatty acids
en_US
dc.subject
Protein
en_US
dc.subject
Digestion
en_US
dc.title
Biochemical and nutritional evaluation of Chlorella and Auxenochlorella biomasses relevant for food application
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-09-30
ethz.journal.title
Frontiers in Nutrition
ethz.journal.volume
7
en_US
ethz.pages.start
565996
en_US
ethz.size
9 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Lausanne
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02070 - Dep. Gesundheitswiss. und Technologie / Dep. of Health Sciences and Technology::02701 - Inst.f. Lebensmittelwiss.,Ernährung,Ges. / Institute of Food, Nutrition, and Health::09571 - Mathys, Alexander / Mathys, Alexander
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02070 - Dep. Gesundheitswiss. und Technologie / Dep. of Health Sciences and Technology::02701 - Inst.f. Lebensmittelwiss.,Ernährung,Ges. / Institute of Food, Nutrition, and Health::09571 - Mathys, Alexander / Mathys, Alexander
en_US
ethz.date.deposited
2020-09-03T17:15:26Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-11-13T08:25:17Z
ethz.rosetta.lastUpdated
2021-02-15T20:44:33Z
ethz.rosetta.versionExported
true
ethz.COinS
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