Biochemical composition of two red seaweed species grown on the Brazilian coast

2011 ◽  
Vol 91 (9) ◽  
pp. 1687-1692 ◽  
Author(s):  
Vanessa Gressler ◽  
Mutue T Fujii ◽  
Aline P Martins ◽  
Pio Colepicolo ◽  
Jorge Mancini-Filho ◽  
...  
Keyword(s):  
Biochemical Composition ◽  
Brazilian Coast ◽  
Red Seaweed ◽  
Seaweed Species

Copper, Zinc, Nickel, and Cobalt biosorption potential of Fucus vesiculosus (Phaeophyceae) and Gracilaria tikvahiae (Rhodophyta)

2009 ◽  
Vol 4 (2) ◽  
Author(s):  
A. Chaudhuri ◽  
M. Mitra ◽  
J.G. Schwarz ◽  
S. Schiewer
Keyword(s):  
Inductively Coupled Plasma ◽  
Brown Seaweed ◽  
Atomic Emission ◽  
Fucus Vesiculosus ◽  
Isotherm Models ◽  
Red Seaweed ◽  
Seaweed Species ◽  
Gracilaria Tikvahiae ◽  
Copper Zinc ◽  
Zinc Nickel

Dried raw and protonated biomasses of the brown seaweed Fucus vesiculosus and the red seaweed Gracilaria tikvahiae were used to study their biosorption performance for copper, zinc, nickel, and cobalt. Representative samples of both species were collected from Chincoteague Bay, Virginia. A series of “sorbate” or metal concentrations (10-450 mg L-1) were selected for each metal to compare the seaweeds' biosorption performance at pH 4.5 ± 0.1 and 25±1 °C. Samples were analyzed on Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES). Langmuir and Freundlich adsorption isotherm models for single solute systems were used to assess sorption performance. Both raw and protonated Fucus vesiculosus exhibited higher affinity for metal ions than Gracilaria tikvahiae, at both high and low ends of the concentration ranges. The protonated red seaweed species had maximum metal uptake values of 0.99 mequiv g-1 (copper), 0.39 mequiv g-1 (zinc), 0.66 mequiv g-1 (nickel) and 0.79 mequiv g-1 (cobalt). In comparison, protonated Fucus vesiculosus sorbed higher amounts (1.63, 1.10, 1.40, and 1.69 mequiv g-1 of the metals in the same order). The prospects of using the brown seaweed species in the treatment of industrial wastewaters in place of expensive, conventional ion-exchange resins are envisaged.

scholarly journals Seasonal variation in the biochemical composition of red seaweed (Catenella repens) from Gangetic delta, northeast coast of India

2009 ◽  
Vol 118 (5) ◽  
pp. 497-505 ◽  
Author(s):  
Kakoli Banerjee ◽  
Rajrupa Ghosh ◽  
Sumit Homechaudhuri ◽  
Abhijit Mitra
Keyword(s):  
Seasonal Variation ◽  
Biochemical Composition ◽  
Red Seaweed ◽  
Northeast Coast

Molecular identification of the exotic lineage of Kappaphycus alvarezii (Rhodophyta, Solieriaceae) cultivated in the tropical region of Brazil

Phytotaxa ◽  
2013 ◽  
Vol 109 (1) ◽  
pp. 17 ◽  
Author(s):  
PATRÍCIA G. ARAÚJO ◽  
GEORGE E. C. MIRANDA ◽  
MARIA B. BARROS-BARRETO ◽  
MUTUE T. FUJII
Keyword(s):  
Molecular Identification ◽  
Kappaphycus Alvarezii ◽  
Biological Information ◽  
Tropical Region ◽  
Brazilian Coast ◽  
Red Seaweed ◽  
Invasive Potential ◽  
Commercial Cultivation ◽  
Tropical Area ◽  
Kappa Carrageenan

Kappa carrageenan is an important phycocolloid extracted from the red seaweed Kappaphycus alvarezii. This species has been introduced into several regions, most recently in Brazil. The remote invasive potential of this seaweed in both south and southeast waters of Brazil (subtropical regions) has been established, but introduction in the northeastern tropical area is contested due to the absence of biological information. An unknown exotic lineage of K. alvarezii has been illegally introduced and cultivated in an area characterized by the presence of coral reefs in Paraíba, the northeastern Brazilian coast, since the beginning of the last decade. This work focuses on the molecular identification of these samples in comparison with sequences of other strains of K. alvarezii and congeners available in Genbank. Maximum likelihood (ML) and Bayesian inference (BI) analyses showed strong similarities between K. alvarezii cultivated in the tropical waters in Brazil and those lineages cultivated in Hawaii, Venezuela, Malaysia and Tanzania that have never shown invasive behavior. However, more detailed investigations and use of environmental monitoring are recommended before commercial cultivation of this species can be authorized in tropical region of Brazil.

The effect of drying on undervalued brown and red seaweed species: Bioactivity alterations

2021 ◽  
Author(s):  
Diana R. Julião ◽  
Cláudia Afonso ◽  
Ana Gomes‐Bispo ◽  
Narcisa M. Bandarra ◽  
Carlos Cardoso
Keyword(s):  
Red Seaweed ◽  
Seaweed Species

scholarly journals Seasonal variations in the biochemical composition of some common seaweed species from the coast of Abu Qir Bay, Alexandria, Egypt

Oceanologia ◽  
2013 ◽  
Vol 55 (2) ◽  
pp. 435-452 ◽  
Author(s):  
Hanan M. Khairy ◽  
Shimaa M. El-Shafay
Keyword(s):  
Seasonal Variations ◽  
Biochemical Composition ◽  
Seaweed Species ◽  
Abu Qir Bay

Seaweed resources of Tanzania: status, potential species, challenges and development potentials

2020 ◽  
Vol 63 (4) ◽  
pp. 371-380
Author(s):  
Flower E. Msuya
Keyword(s):  
Western Indian Ocean ◽  
Added Value ◽  
Red Seaweed ◽  
Seaweed Farming ◽  
Seaweed Species ◽  
Red Seaweeds ◽  
Commercial Farming ◽  
Commercial Species ◽  
Good Quality Seed ◽  
Seaweed Industry

AbstractTanzania is endowed with a rich biodiversity of seaweed species that grow naturally in its oligotrophic waters of the Western Indian Ocean. Most of these species are unexploited. Only two red seaweeds Eucheuma and Kappaphycus have been studied for commercial farming and the industrial production is based on these species. Another genus of red seaweed, Gracilaria, has been studied and experimented upon for potential farming while others such as the green Ulva, the red Hypnea and the brown Sargassum have been mentioned as potential species for farming. Farming technology used to cultivate the two commercial species is the shallow water off-bottom technology which is badly affected by the increase in surface seawater temperatures (climate change), causing massive die-backs and decreased seaweed production. Some deeper-water farming technologies have been developed but only tubular nets show promise and have been piloted. A number of opportunities exist in seaweed farming, which can be used to advance the industry. The future of the seaweed industry in Tanzania will depend on using the existing opportunities, including utilising the seaweed species already studied, exploring the potential of other seaweed species for farming, development of deeper-water farming technologies, added-value, and ensuring availability of good quality seed material.

scholarly journals STRUCTURAL CHARACTERIZATION OF AGAR EXTRACTED FROM SIX RED SEAWEED SPECIES GROWING IN THE COAST OF VIETNAM

2017 ◽  
Vol 25 (2) ◽  
pp. 395-403
Author(s):  
Tran Thi Thanh Van ◽  
Bui Minh Ly ◽  
Ngo Quoc Buu ◽  
Chu Dinh Kinh
Keyword(s):  
Structural Characterization ◽  
Algal Species ◽  
Gel Strength ◽  
Raw Material ◽  
Spectroscopic Methods ◽  
Red Seaweed ◽  
Seaweed Species ◽  
Coast Of Vietnam ◽  
Agar Production

Polysaccharides extracted from six red seaweed species growing in Vietnam have been studied. Characterisation of their structure by chemical and spectroscopic methods showed that all of them have a basic repeating structure of alternating 3-linked b-D-galactopyranosyl and 4-linked 3,6-anhydro a-L-galactopyranosyl units with substituted methyl ether groups.   The native agar offers only weak gelling abilities owing to the 4-linked a-L-galactopyranosyl 6-sulfate as its precursor. Conversion of this unit into the corresponding 3,6-anhydride by treating with hot alkali generally led to gel strength increasing. The agars from G. fisheri and G. firma are poorly substituted, while those from G.asiatica, G.tenustipitata and G. heteroclada are partly methylated on position 6 of the 3-linked b-D- galactose. Agar from Gelidiella acerosa is partlly methylated on both positions 6 and 2 of the 4linked 3,6-anhydro a-L-galactose.   The alkali- modified agars have been obtained in acceptable quantities with gel strength of 300932 g/cm2. The obtained results showed that all the six algal species are suitable as raw material for commercial agar production and worthy of further cultivation

Biochemical composition, nutritional value, and antioxidant properties of seven seaweed species from the Madeira Archipelago

2017 ◽  
Vol 29 (5) ◽  
pp. 2427-2437 ◽  
Author(s):  
N. Nunes ◽  
S. Ferraz ◽  
S. Valente ◽  
Maria Carmo Barreto ◽  
M. A. A. Pinheiro de Carvalho
Keyword(s):  
Biochemical Composition ◽  
Nutritional Value ◽  
Antioxidant Properties ◽  
Seaweed Species ◽  
Madeira Archipelago

Catalytic Approach for Production of Hydrocarbon Rich Bio-Oil from a Red Seaweed Species

2020 ◽  
pp. 109-133
Author(s):  
Sanjay Kumar ◽  
Priyanka Roat ◽  
Sonal Hada ◽  
Bhawna Chechani ◽  
Neetu Kumari ◽  
...  
Keyword(s):  
Red Seaweed ◽  
Seaweed Species ◽  
Bio Oil
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