Microalgae have the ability to grow rapidly, synthesize and accumulate large amounts (approximately 20–50% of dry weight) lipids. A successful economically viable algae based oil industry depends on selection appropriate algal strains. In this study ten species microalgae were prospected determine their suitability for production: Chaetoceros gracilis, mulleri, Chlorella vulgaris, Dunaliella sp., Isochrysis Nannochloropsis oculata, Tetraselmis chui, tetrathele Thalassiosira weissflogii. The...

World aquaculture is increasingly diversified and intensive, due to the use of new technologies, having grown a lot in recent decades contributed significantly improving food security reducing poverty world, with fish farming being promising activity for production protein high nutritional value. The large companies that recognize potential this important modality have invested study various productive segments most diverse species fish. This review article aims provide information on world...

Currently, the high food demand led to a mass agriculture practices, whereas crop productivity is one of major concerns for producers.However, intensification use synthetic fertilizers has serious harmful impacts human health and environment.The quest novel natural agricultural products current trend, hence seaweed polysaccharide bioactivity can contribute this pursuit.The principal carbohydrates (agar, carrageenan alginate) were extracted chemically characterized from five red seaweeds,...

Marine macroalgae are a vast source of raw materials and biologically active molecules used in the pharmaceutical, cosmetic, food agricultural industries. The search for free chemical residues by consumers has led producers to use environmentally friendly economically viable products as they natural compounds, forming new promising area study. In this context, concentrated marine algae extracts (CMAEs) an important alternative production model. This work aimed evaluate effects CMAEs...

To exploit the nutraceutical and biomedical potential of selected seaweed-derived polymers in an economically viable way, it is necessary to analyze understand their quality yield fluctuations throughout seasons. In this study, seasonal polysaccharide respective were evaluated three seaweeds, namely agarophyte Gracilaria gracilis, carrageenophyte Calliblepharis jubata (both red seaweeds) alginophyte Sargassum muticum (brown seaweed). It was found that agar synthesis G. gracilis did not...

Calliblepharis jubata is an edible red seaweed and a carrageenan primary producer, considered native in Figueira da Foz (Portugal). C. has the particularity of producing only one kind carrageenan, iota fraction. However, this not yet valuable for food industry or even human consumption. In work, we characterize important biochemical compounds growing up within different cultivation techniques wild specimens. The aim work to know if there are differences between biological interest identify...

The chemical composition of the culture medium is essential for microalgae growth, and to increase production biomass oil. This work studied influence sodium nitrate concentration on oil recovery in Chlorella vulgaris, Nannochloropsis oculata, Tetraselmis chui, tetrathele. Microalgae were cultivated mediums with addition varying from 25 75 mg/L. increased N.oculata (from 0.4 2.2 g/L) C.vulgaris 1.4 3.4 had limited growth T.tetrathele, while no change was observed T.chui. ratio nitrogen...

Anticoagulant and antithrombotic properties of sulfated-polysaccharides (SP) from marine algae are extensively exploited. However, reports on the vascular effects SP red rare in literature. The polysaccharide Solieria filiformis (Sf-SP) was isolated by ion exchange chromatography, analyzed agarose gel electrophoresis tested male Wistar rats. inflammation studies were performed using paw-edema model relaxant activity aorta pre-contracted with phenylephrine. anticoagulant effect evaluated test...

Microalgae are commonly used in aquiculture as feed for postlarval mollusks, fish and crustaceans because they easy to grow, small size, grow rapidly have high levels of fatty acids.These microorganisms also accumulate amounts oil, which can be extracted converted into biodiesel using chemical processes.In this work, freshwater microalgae Chlorella vulgaris was grown the Live Food Production Laboratory (LABPAV/IFCE Aracati Campus), with urea (stock solution 1), triple superphosphate 2)...

En este trabajo se presenta la metodología seguida con vistas a evaluar expansión del hormigón debido al ataque sulfático interno y su repercusión en el comportamiento anómalo de presas gravedad. Para ello análisis, distintas fases estudio, tres españolas afectadas por las reacciones sulfáticas. nivel microscópico ha procedido caracterización árido presa Torán, identificando principal sulfuro hierro los productos generados proceso alteración posterior hormigón. Por otro lado, estudio...

O aumento nos cultivos comerciais de tilápias em regiões costeiras levam à exposição dos animais diferentes situações estresse pelo emprego técnicas transferência para águas com salinidades mais elevadas. uso polissacarídeos sulfatados (PS) algas marinhas como agentes profiláticos sugerem reduzir o impacto do peixes e camarões. Objetivou-se avaliar efeito da adição doses PS extraídos alga marinha parda Lobophora variegata na água cultivo alevinos revertidos tilápia (Oreochromis niloticus)...

In order to evaluate the performance of Nile tilapia (Oreochromis niloticus), daily feeding amounts were varied in an experiment following a completely randomized design for 154 days and consisting four treatments with three replications each, totaling 12 tanks 3 m3 (3 x 1 m) area each at densities 5 fish m-3 (initial) until end experiment. Throughout experimental period, amount feed was delimited time (8h00, 11h00, 14h00 17h00) as: 25; 25 25% treatment - T1; 20; 30; 30 20% 2 T2; 20 30% T3;...

The study evaluated the effect of oral administration sulfated polysaccharides (SP) extracted from marine macroalga Kappaphycus alvarezii on survival and weight gain Nile tilapia post larvae during sex reversal in a stress situation. SP were seaweed by enzymatic digestion incorporated into diet before addition hormone 17-α-methyltestosterone, administered at doses 0.05, 0.1 0.2 mg g-1 body control (without SP), for 28 days. In last week situation was established removing aeration water...

Glycosaminoglycans (GAGs) comprise the extracellular matrix of animal tissues, and residues from processing fish commercially harvested may offer new anticoagulant agents to substitute heparin (HEP) in medical sciences. The aim this study was purify, characterize physico-chemically evaluate activity GAGs isolated skin Nile tilapia, Oreochromis niloticus. were extracted with papain 100 mM sodium acetate buffer (pH 5.0) containing cystein EDTA (5 mM), followed by ion-exchange chromatography on...

Nannochloropsis oculata is a marine algae with high lipid content, being promising species for biofuel production. It also used as food in aquaculture larval fish and crustaceans due to its nutritional value compatible size the larvae feeding. This study evaluated content biomass of N. under nitrate depletion. The cultivation was carried out 8 L bottles three replications, at salinity 27, illuminance 60 μE cm-2 s-1 temperature 28 °C. levels sodium were 15; 30; 45; 75 mg L-1, while...

Marine algae are organisms of great importance for life maintenance, therefore they responsible most the oxygenconsumption in Earth. They widely used food industries, cosmetics and medicines and, granting biotechnology development, scientifi c community interest studying them is on increase. The present work aims to evaluate cultivation under controlled conditions extraction sulfated polisaccharides (SP) some micro macroalgal species. Microalgae farming was carried out from species...

O peixe marinho tibiro, Oligoplites palometa (Cuvier,1832) (Osteichthyes: Carangidae), é uma espécie importante, especialmente para a população nativa de pescadores do litoral Natal, Rio Grande Norte, Brasil. presente trabalho verificou o tipo crescimento e alguns aspectos reprodutivos, tais como proporção sexual, fator condição, índice gonadossomático desenvolvimento gonadal O. das águas costeiras da praia Ponta Negra Redinha, RN.