A Comparison of the Antioxidant Properties and Total Phenolic Content in a Diatom, Chaetoceros sp. and a Green Microalga, Nannochloropsis sp.

Goh, Su Hua; Yusoff, Fatimah Md.; Loh, Su Peng

doi:10.5539/jas.v2n3p123

Cited by 50 publications

(42 citation statements)

References 32 publications

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“…TPC has been reported recently for various microalgae species in relation to their antioxidant potential (Duval et al 2000;Li et al 2007;Goh et al 2010;Hajimahmoodi et al 2010;Custódio et al 2012;Goiris et al 2012). However, since plant-based phenolic compounds also play both beneficial and detrimental roles in animal nutrition (in particular protein bioavailability), their measurement is important and has not yet been reported for most of the species studied here.…”

Section: −1mentioning

confidence: 94%

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

2014

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=b8564d17-860a-4eb5-80c6-fd741c419b07 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=b8564d17-860a-4eb5-80c6-fd741c419b07 Abstract Proximate, amino acid and elemental composition, total phenolic content (TPC), and in vitro protein digestibility (IVPD) of microalgal biomass were determined. Microalgae contained low to moderate ash (5-17 %), moderate to high carbohydrate (18-46 %), crude protein (18-46 %), high crude lipid (12-48 %), and energy (19-27 MJ kg −1 ). Characteristic of microalgae, non-essential amino acids (AAs), aspartic and glutamic acids, were predominant (20-30 % of protein; 8-12 % of dry weight). Microalgae had favorable essential AA profiles with high essential amino acid (EAA) indices (0.9-1.2). Expressed as gE A A1 0 0gp r o t e i n −1 , Porphyridium aerugineum was rich in leucine (11.9), lysine (8.0), arginine (8.6), and tryptophan (3.3); Nannochloropsis granulata (A) in leucine (11.0), lysine (8.5), and tryptophan (2.8); Tetraselmis chuii and Botryococcus braunii in arginine (9.4 and 20.5, respectively); and Phaeodactylum tricornutum in lysine (6.4) and tryptophan (2.6). Mineral compositions (%) were calcium (0.1-3.0), magnesium (0.3-0.7), phosphorous (0.7-1.5), potassium (0.7-2.4), sodium (0.8-2.7), and sulfur (0.4-1.4), and trace element compositions (mg kg −1 )we reco pp er(1 8 -102), iron (1,395-11,101), manganese (45-454), selenium (0-0.5), and zinc (28-64). Microalgae contained low TPC (6-13 mg gallic acid equivalents (GAE) g −1 DW), except T. chuii (20 mg GAE g −1 DW). IVPD was high (>90 %) for B. braunii (A), P. aerugineum, and lipid-extracted N. granulata (B); mid-range (80-89 %) for P. tricornutum, N. granulata (A), B. braunii (B), Neochloris oleoabundans, T. chuii, and whole N. granulata (B); and lower (<80 %) for Acutodesmus dimorphus.M i c r o a l g a ls p e c i e sP. tricornutum, B. braunii, N. granulata,a n dT. chuii had high protein (40-52 %), IVPD (82-97 %), and digestible protein (35-50 %), comparable to plant proteins used in animal feeds and aquaculture.

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Section: −1mentioning

confidence: 94%

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

2014

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“…Although many microalgal species have been reported widely for their antioxidant activity (Li et al, 2007;Rao et al, 2006;Duan et al, 2006;Wu et al, 2005;Herrero et al, 2006Herrero et al, , 2005Murthy et al, 2005;Tannin-Spitz et al, 2005;Kuda et al, 2005;Guzman et al, 2001;Mirada et al, 1998) there has been limited information on antioxidant levels of microalgae under varying culture conditions. Few studies reported that phenolic compounds had a high antioxidant capacity (Jaime et al, 2005;Geetha et al, 2010;Custodio et al, 2012), while another study found the opposite (Goh et al, 2010) hence it is not clear whether phenolic substances are important antioxidants in microalgae.…”

Section: Introductionmentioning

confidence: 99%

Relationship Between Total Phenolics Content and Antioxidant Activities of Microalgae Under Autotrophic, Heterotrophic and Mixotrophic Growth

Shetty¹,

Sibi²

2014

J. of Food Resource Science

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A study was carried out to explore the relationship between growth conditions and antioxidant properties of microalgae. Further, correlation between phenolics and antioxidant activities were studied to determine whether antioxidant activity depends on microalgal phenolics content under varying culture conditions. Total phenolics and antioxidant properties of Chlorella vulgaris and Scenedesmus obliquus grown under autotrophic, heterotrophic and mixotrophic conditions were evaluated. Domestic water, Bold's medium and sewage water were used to cultivate the microalgae and the extracts were prepared in methanol and analyzed for biochemical (total phenolics) and antioxidant properties (DPPH assay, super oxide scavenging assay and antioxidant potential). The experiments were done in triplicates and significant correlation coefficients between antioxidant properties against phenolic content and growth conditions were interrelated. The amount of total phenolics content varied in growth conditions and ranged from 0.11-0.55 mg GAE gG 1 . Significant correlation co-efficient between phenolics and antioxidant properties of microalgae determined by DPPH, superoxide anion scavenging and total antioxidant activities were found in the study. The strongest positive correlation was found to be between total phenolics and DPPH activity in C. vulgaris (r = 0.997). In S. obliquus, the strongest positive correlation was between total phenolics and antioxidant potential (r = 0.091) at p<0.01 followed by superoxide scavenging (p<0.05). The findings indicated that phenolic compounds were the major contributors to the antioxidant properties of microalgae. The results demonstrated that strongest positive correlation was observed in mixotrophic conditions followed by autotrophic conditions in Chlorella whereas the correlation was significant under heterotrophic conditions in Scenedesmus followed by mixotrophic conditions.

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“…However, it is arguable whether these compounds are safe and their use in food products is questioned (Konczak, Zabaras, Dunstan & Aguas, 2010;Kosar, Goger & Baser, 2011). In recent years there has been an interest to determine total phenolics (as natural antioxidant) content and their antioxidant activities in various plants specifically by-products of agriculture and even marine microorganisms (Negro, Tommasi & Miceli, 2003;Lee & Lee, 2010;Fu et al, 2011;Goh, Yusoff & Loh, 2010). Phenolic compounds of edible and inedible plants have multiple biological effects such as anti-inflammatory, bactericidal as well as antioxidant properties because of their ability to neutralize free radicals (Wojdylo, Oszmianski & Czemerys, 2007;Temerdashev, Frolova & Kolychev, 2011).…”

Section: Introductionmentioning

confidence: 99%

Phenolic Compounds and Antioxidant Activity from Saffron (Crocus sativus L.) Petal

Goli¹,

Mokhtari²,

Rahimmalek³

2012

JAS

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Saffron petal is the main by-product of saffron processing which is producing in large amounts annually. The purposes of this work were to determine total phenolics content in the methanolic extract of saffron petal using Folin-ciocalteu reagent and to measure their antioxidant activity in various in vitro models, such as β-carotene-linoleate and 1,1-diphenyl-2-picryl hydrazyl (DPPH). Saffron petal extract in different concentrations (0.5-5 mg ml -1 ) were compared with standard antioxidants of ascorbic acid, α-tocopherol and TBHQ (0.5-1 mg ml -1 ). Total phenolics content was 3.42 mg gallic acid/g dry weight. In model systems of β-carotene-linoleate and DPPH, the extract at 500 ppm concentration showed 91.4% and 74.2% antioxidant activity which was comparable with that of TBHQ (93.1% and 77.9%) at 100 ppm. The results showed that saffron petal could be considered as a bioresource of phenolic compounds with high antioxidant activity.

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A Comparison of the Antioxidant Properties and Total Phenolic Content in a Diatom, Chaetoceros sp. and a Green Microalga, Nannochloropsis sp.

Cited by 50 publications

References 32 publications

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

Chemical composition and nutritional properties of freshwater and marine microalgal biomass cultured in photobioreactors

Relationship Between Total Phenolics Content and Antioxidant Activities of Microalgae Under Autotrophic, Heterotrophic and Mixotrophic Growth

Phenolic Compounds and Antioxidant Activity from Saffron (Crocus sativus L.) Petal

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