Thirty microalgal strains were screened in the laboratory for their biomass productivity and lipid content. Four (two marine two freshwater), selected because robust, highly productive with a relatively high content, cultivated under nitrogen deprivation 0.6-L bubbled tubes. Only microalgae accumulated such conditions. One of them, eustigmatophyte Nannochloropsis sp. F&M-M24, which attained 60% content after starvation, was grown 20-L Flat Alveolar Panel photobioreactor to study influence...

Microalgae are considered a very interesting source for the development of new food products and can be used to enhance nutritional value conventional foods, due their valuable biochemical composition. The aim this study was investigate composition, fatty acid profile in vitro digestibility twelve microalgal biomasses (Arthrospira platensis F&M-C256; bloom mainly composed Aphanizomenon flos-aquae from Klamath Lake; Nostoc sphaeroides F&M-C117; Chlorella sorokiniana F&M-M49; IAM C-212;...

The objective of this techno-economic analysis (TEA) was to define the production cost microalga Tetraselmis suecica in a 1-ha plant made "Green Wall Panel-II" (GWP®-II) photobioreactors. study based on an energy carried out for similar located Tuscany (Italy) and considers steps from inoculum preparation wet algal paste. Costs equipment materials were obtained manufacturers suppliers, while operating costs output data (e.g. biomass composition productivity) collected during several years...

Chlorella is one of the few microalgae employed for human consumption. It typically has a high protein content, but it can also accumulate amounts lipids or carbohydrates under stress conditions and, this reason, interest in production biofuels. High costs and energy consumption are associated with its cultivation. This work describes strategy to reduce environmental impact biomass food, biofuels other applications. The growth four strains, selected after laboratory screening, was...

Crackers are widely consumed snack foods and there is an increasing trend in adding functional ingredients to their composition. In the present work, dried biomasses of four microalgae strains-Arthrospira platensis F&M-C256, Chlorella vulgaris Allma, Tetraselmis suecica F&M-M33, Phaeodactylum tricornutum F&M-M40-were used as a source proteins, antioxidants, other bioactive molecules artisanal wheat crackers. Two incorporation levels were tested: 2% (w/w) 6% (w/w). The impact addition was...

We isolated 59 strains of cyanobacteria from the benthic microbial mats 23 Antarctic lakes, five locations in two regions, order to characterize their morphological and genotypic diversity. On basis morphology, were assigned 12 species that included four endemic taxa. Sequences ribosomal RNA gene determined for 56 strains. In general, closely related at 16S rRNA level belonged same morphospecies. Nevertheless, divergences observed concerning diversity terms richness, novelty, geographical...

Tetraselmis suecica production in a 1-ha GWP plant Tuscany (Italy) has NER < 1. Major energy costs are embodied of and mixing.In suitable location (North Africa) the increases by 40%.Integration photovoltaic allows to achieve 1.7.T. cultivated can yield up 30 t protein ha À1 year .

ABSTRACT The effect of light quality on cell size and cycle, growth rate, productivity, photosynthetic efficiency biomass composition the marine prasinophyte Tetraselmis suecica F&amp;M‐M33 grown in 2‐L flat panel photobioreactors illuminated with emitting diodes (LEDs) different colors was investigated. Biomass productivity were comparable between white red light, while under blue green decreased to less than half about one third. Differences number correlated cycle phase. Under cells...

The aim of this work was to evaluate the influence Arthrospira platensis F&M-C256 (spirulina) incorporation on nutritional and functional properties "crostini", a leavened bakery product largely consumed in Italy Europe. Sourdough used as leavening fermentation agent three concentrations A. were tested: 2%, 6% 10% (w/w). Despite lower volume increase compared control, "crostini" doughs reached technological appropriate after fermentation. At end fermentation, no significant differences...

The first objective of this study was to evaluate the use lyophilised biomass cyanobacterium Arthrospira platensis F&M-C256 as sole substrate for lactic acid fermentation by probiotic bacterium Lactobacillus plantarum ATCC 8014. After 48 h fermentation, bacterial concentration 10.6 log CFU mL−1 and reached 3.7 g L−1. Lyophilised A. shown be a suitable L. 8014 growth. second investigate whether could enhance in vitro digestibility antioxidant activity biomass. Digestibility increased 4.4%,...

Despite a growing interest in microalgae and cyanobacteria as potential sources of nutrients aquafeeds, little information is presently available on their nutritive value for carnivorous fish species. The aim this study was to evaluate chemical composition nutrient digestibility panel dried biomasses (MACB), using rainbow trout (Oncorhynchus mykiss W.) model. Nine test diets were obtained by mixing 80 parts reference diet, added with 20 g/kg acid insoluble ash an indigestible marker, each...

The cyanobacterium Nostoc strain ATCC 53789, a known cryptophycin producer, was tested for its potential as source of natural pesticides. antibacterial, antifungal, insecticidal, nematocidal, and cytotoxic activities methanolic extracts the were evaluated. Among target organisms, nine fungi (Armillaria sp., Fusarium oxysporum f. sp. melonis, Penicillium expansum, Phytophthora cambivora, P. cinnamomi, Rhizoctonia solani, Rosellinia, Sclerotinia sclerotiorum, Verticillium albo-atrum) growth...

ABSTRACT Phaeodactylum tricornutum is a widely studied diatom and has been proposed as source of oil polyunsaturated fatty acids (PUFA), particularly eicosapentaenoic acid (EPA). Recent studies indicate that lipid accumulation occurs under nutritional stress. Aim this research was to determine how changes in nitrogen availability affect productivity, yield, (FA) composition P. UTEX 640. After preliminary laboratory trials, outdoor experiments were carried out 40‐L GWP® reactors different...

The main objective of this study was to evaluate the suitability Arthrospira platensis F&M-C256 (spirulina) biomass in a vegetal soybean drink or water, as substrate for lactic acid fermentation by probiotic bacterium Lactiplantibacillus plantarum ATCC 8014 (LAB8014) and fermented products terms bacteria content organic acids content, biochemical composition, total phenolics, phycocyanin vitro digestibility, vivo antioxidant activity. After 72 h fermentation, bacterial concentration about...

Abstract Arthrospira platensis is a cyanobacterium known for its widespread use as nutraceutical and food additive. Besides high protein content, this microorganism also endowed with several bioactivities related to health benefits in humans that make it candidate functional foods. These properties are strain culture condition dependent. We compared, terms of biomass productivity protein, C-phycocyanin, polysaccharide two A. strains, F&amp;M-C256 F&amp;M-C260, characterized by morphological...

To exploit the cyanobacterial diversity of microbial mats growing in benthic environment Antarctic lakes for discovery novel antibiotic and antitumour activities.In all, 51 cyanobacteria isolated from were cultivated laboratory by optimizing temperature, irradiance mixing. Productivity was generally very low (</=60 mg l(-1) d(-1)) with growth rates (mu) range 0.02-0.44 d(-1). Growth limited photosensitivity, sensitivity to air bubbling, polysaccharide production or cell aggregation. Despite...