Phytochemicals from Algae

The effect of nitrogen (N: low = 2% N or moderate = 10% N) levels and cultivation (photoautotrophic or mixotrophic) modes on the biochemicals in Chlorella minutissima was evaluated using a mass culture system. Moderate N and mixotrophic cultures had higher biomass, protein, carbohydrate content and photosynthetic pigments than the low N and photoautotrophic treatments. In contrast, lipid and fatty acid content of the low N and photoautotrophic treatments were higher than in the moderate N and mixotrophic cultures. More phytochemicals were accumulated in moderate N and mixotrophic cultures which corresponded to better antioxidant capacity in the extracts. The most potent (0.7 mg · mL(-1) ) acetylcholinesterase inhibitory activity was displayed by moderate N and mixotrophic treatment. Approximately 60% of the extracts exhibited a noteworthy antimicrobial activity regardless of the N levels and cultivation modes. Thus, moderate N level enhanced the phytochemicals and biological activities of C. minutissima cultured under a mixotrophic system.

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“…These valuable biochemical compounds have well‐known and have a wide range of applications (Brennan et al. , Koller et al. ).…”

Section: Discussionmentioning

confidence: 99%

“…These approaches offer the possibilities of mass-producing valuable therapeutic compounds in microalgae. As microalgae are considered as functional food, dietary supplements, and nutraceuticals, the benefits of obtaining such compounds from microalgae cannot be overemphasized (Mata et al 2010, Varfolomeev and Wasserman 2011, Brennan et al 2012.…”

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confidence: 99%

Manipulation of nitrogen levels and mode of cultivation are viable methods to improve the lipid, fatty acids, phytochemical content, and bioactivities in Chlorella minutissima

Aremu

Neményi

Stirk

et al. 2015

Journal of Phycology

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“…The liquid phase was then diluted to 250 mL with deionized water and analyzed for 6 anions and cations using a DX-100 ion-chromatography analyzer (Dionex, USA). After centrifugation the solid samples were freeze-dried and analyzed for CHNSO content using a CE Instruments Flash EA 112 series elemental analyzer.…”

Section: Microwave Processingmentioning

confidence: 99%

“…The extraction of value added compounds is 3 essential to improve the economics of producing renewable fuels from microalgae and should be considered. Microalgae are a highly promising source of valuable phytochemicals such as pigments, recombinant proteins, mono-and polyunsaturated fats such as omega-3 fats and polysaccharides (Brennan et al, 2012). Limited studies have looked into the extraction of lipids and polysaccharides before further processing into biofuels.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal microwave processing of microalgae as a pre-treatment and extraction technique for bio-fuels and bio-products

Biller

Friedman

Ross

2013

Bioresource Technology

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Microalgae are regarded as a promising source of lipids for bio-diesel production and bioproducts. The current paper investigates the processing of microalgal slurries under controlled microwave irradiation. Microwave power was applied to reach temperatures of 80, 100, 120 and 140°C at a constant residence time of 12 min. Microwave irradiation led to disruption of the algal cell walls which facilitated lipid extraction. The influence of inorganic material on microwave heating was assessed for three strains including, Nannochloropsis occulata, Chlorogloeopsis fritschii and Pseudochoricystis ellipsoidea. Mass balances were calculated and showed that the amount of carbon, nitrogen and total mass recovered in the residue was highly dependent on process conditions and algae strain. Hydrothermal microwave processing (HMP) was found to be an effective pre-treatment for hydrothermal liquefaction and extraction of lipids and phytochemicals.

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“…Also, the development of sustainable and friendly technologies that involve new trends of applied sciences has started in the last two decades, therefore, algae and cyanobacteria serve as natural ecological resource for human being. Based on cultured species, a number of environmental and biotechnological studies that include wastewater treatment, ecological friendly biofuel, aquaculture, production of various types of highvalue products such as fatty acids, pigments or antitumor agents useful for cosmetic and drug industries have been developed (gachon et al, 2007; Mata et al., 2010;BrEnnan et al, 2012 …”

mentioning

confidence: 99%

Collection of pure cultures of algae and cyanobacteria for research, teaching and biotechnological applications (Nature Research Centre, Lithuania)

Koreivienė

Kasperovičienė

Savadova

et al. 2016

Botanica Lithuanica

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Koreivienė J., Kasperovičienė J., Savadova K., Karosienė J., Vitonytė I., 2016: Collection of pure cultures of algae and cyanobacteria for research, teaching and biotechnological applications (Nature Research Centre, Lithuania) [Dumblių ir melsvabakterių kolekcija mokslui, mokymui ir biotechnologiniams tyrimams (Gamtos tyrimų centras, Lietuva)]. -Bot. Lith., 22(1): 87-92.The collection of pure cultures of algae and cyanobacteria deposited at the Nature Research Centre is a unique and diverse culture collection in Lithuania. It was initiated on the basis of a few national projects in 2010 as an outcome of ecological and molecular studies on invasive and harmful bloom-forming algae and cyanobacteria. To date, the collection holds more than 500 strains, which belong to ten classes, over 70 genera and 140 species. Strains were isolated from Lithuanian freshwaters and the Curonian Lagoon. The collection serves for various research topics including species interactions, molecular analysis, biotechnology (remediation of wastewaters, cell wall disruption, high-and low-value bioproducts), as well as for teaching purposes. The European Union has recently adopted an ambitious strategy for the development of bioeconomy and advised to cover the growing demand of the food, energy and industrial sectors from the innovative use of sustainable biological resources (Enzing et al., 2014). In this approach, algae have great importance for the future application in industry and other fields. Algal culture collections are irreplaceable and unique source providing consistency and standardized quality material for many types of investigations such as comparative taxonomic, physiological, ecotoxicological and ex situ ecological studies (Day et al., 2004). Ecological investigations of algal and cyanobacteria community in the ecosystems nowadays are often combined with the experimental studies in which pure cultures are included. Also, the development of sustainable and friendly technologies that involve new trends of applied sciences has started in the last two decades, therefore, algae and cyanobacteria serve as natural ecological resource for human being. Based on cultured species, a number of environmental and biotechnological studies that include wastewater treatment, ecological friendly biofuel, aquaculture, production of various types of highvalue products such as fatty acids, pigments or antitumor agents useful for cosmetic and drug industries have been developed (gachon et al., 2007; Mata et al., 2010;BrEnnan et al., 2012 Keywords 88Koreivienė J., Kasperovičienė J., savadova K., Karosienė J., vitonytė i.are the leaders among countries that have the largest number of collections (Table 1). Several thousands of strains originated from different climate regions and various types of environments (freshwater, marine, hypersaline or terrestrial) are maintained in the largest culture collections. Nevertheless, the authentic strains isolated from the original localities in the particular region or country is an invaluable reso...

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Phytochemicals from Algae

Cited by 6 publications

References 208 publications

Manipulation of nitrogen levels and mode of cultivation are viable methods to improve the lipid, fatty acids, phytochemical content, and bioactivities in Chlorella minutissima

Manipulation of nitrogen levels and mode of cultivation are viable methods to improve the lipid, fatty acids, phytochemical content, and bioactivities in Chlorella minutissima

Hydrothermal microwave processing of microalgae as a pre-treatment and extraction technique for bio-fuels and bio-products

Collection of pure cultures of algae and cyanobacteria for research, teaching and biotechnological applications (Nature Research Centre, Lithuania)

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