izpis_h1_title_alt

Characterization of algae dietary supplements using antioxidative potential, elemental composition, and stable isotopes approach
ID Kejžar, Jan (Avtor), ID Jagodic Hudobivnik, Marta (Avtor), ID Nečemer, Marijan (Avtor), ID Ogrinc, Nives (Avtor), ID Masten Rutar, Jasmina (Avtor), ID Poklar Ulrih, Nataša (Avtor)

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Izvleček
Dietary supplements based on algae, known for their nutritional value and bioactive properties, are popular products among consumers today. While commercial algal products are regarded safe by numerous studies, information about the production and origin of such products is scarce. In addition, dietary supplements are not as strictly regulated as food and medicinal drugs. We characterized different algal products (kelps: Laminariales, Spirulina spp., Chlorella spp., and Aphanizomenon flos-aquae), obtained on Slovenian market, based on their elemental composition (X-ray fluorescence, inductively coupled plasma–mass spectrometry), antioxidative potential [DPPH (2,2-diphenyl-1-picrylhydrazyl) assay, total phenolic content], and stable isotope values [carbon (C), nitrogen (N), and sulfur (S); elemental analyzer isotope ratio mass spectrometry (EA-IRMS) method]. Antioxidative potential is consistent among products of the same type, with A. flos-aquae samples having 4.4 times higher antioxidative potential compared to Chlorella spp. and 2.7 times higher compared to Spirulina spp. Levels of toxic trace elements (arsenic, cadmium, mercury, and lead) are below the maximum allowed values and as such do not pose risk to consumers' health. Samples of Spirulina spp. have relatively high δ$^{15}$N (7.4 ‰ ± 4.4‰) values, which indicate use of organic nitrogen sources in certain samples. Likewise, different elemental composition and isotopic ratios of stable elements (C, N, and S) for the samples with Spirulina spp. or Chlorella spp. are the consequence of using different nutrient sources and algae-growing techniques. Statistical analysis (principal component analysis) has confirmed that all tested A. flos-aquae samples originate from the same source, supposedly Klamath Lake (Oregon, USA). Hawaiian Spirulina pacifica can also be differentiated from all the other samples because of its characteristically high metal content (iron, manganese, zinc, cobalt, nickel, vanadium). Chlorella spp. and Spirulina spp. require further analyses with larger number of samples, as differentiation is not possible based on results of this study.

Jezik:Angleški jezik
Ključne besede:algae, Spirulina, Chlorella, Aphanizomenon flos-aquae, antioxidative potential, stable isotopes, elemental composition, toxic elements
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Leto izida:2021
Št. strani:10 str.
Številčenje:Vol. 7, art. 618503
PID:20.500.12556/RUL-134188 Povezava se odpre v novem oknu
UDK:613.2:582.232:543.61
ISSN pri članku:2296-861X
DOI:10.3389/fnut.2020.618503 Povezava se odpre v novem oknu
COBISS.SI-ID:49471491 Povezava se odpre v novem oknu
Datum objave v RUL:28.12.2021
Število ogledov:675
Število prenosov:144
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Frontiers in nutrition
Skrajšan naslov:Front. nutr.
Založnik:Frontiers Media
ISSN:2296-861X
COBISS.SI-ID:4431992 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:prehrana, prehranska dopolnila, alge, antioksidativni potencial, izotopska sestava, elementna sestava

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P4-0121
Naslov:Biokemijska in biofizikalno-kemijska karakterizacija naravnih snovi

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P1-0143
Naslov:Kroženje snovi v okolju, snovna bilanca in modeliranje okoljskih procesov ter ocena tveganja

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:J4-1773
Naslov:Mlečnokislinska fermentacija kot način obogatitve mikroalgne biomase z novimi nutrienti

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