scholarly journals Physicochemical, Physical Characteristics and Antioxidant Activities of Three Edible Red Seaweeds (Kappaphycus alvarezii, Eucheuma spinosum and Eucheuma striatum) from Sabah, Malaysia

2020 ◽  
Vol 991 ◽  
pp. 012048
Author(s):  
M S Farah Nurshahida ◽  
Z Nazikussabah ◽  
S Subramaniam ◽  
W I Wan Faizal ◽  
M A Nurul Aini
Keyword(s):  
Antioxidant Activities ◽  
Kappaphycus Alvarezii ◽  
Physical Characteristics ◽  
Red Seaweeds

scholarly journals Antioxidant activities of sulfated polysaccharides from brown and red seaweeds

2006 ◽  
Vol 19 (2) ◽  
pp. 153-160 ◽  
Author(s):  
Micheline Cristiane Rocha de Souza ◽  
Cybelle Teixeira Marques ◽  
Celina Maria Guerra Dore ◽  
Fernando Roberto Ferreira da Silva ◽  
Hugo Alexandre Oliveira Rocha ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Sulfated Polysaccharides ◽  
Red Seaweeds

scholarly journals Antioxidative study of polysaccharides extracted from red (Kappaphycus alvarezii), green (Kappaphycus striatus) and brown (Padina gymnospora) marine macroalgae/seaweed

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Prakash Bhuyar ◽  
Sathyavathi Sundararaju ◽  
Mohd Hasbi Ab. Rahim ◽  
Yuwalee Unpaprom ◽  
Gaanty Pragas Maniam ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Kappaphycus Alvarezii ◽  
Chemical Compounds ◽  
Hot Water ◽  
Marine Macroalgae ◽  
Natural Antioxidant ◽  
Antioxidant Compounds ◽  
Active Components ◽  
Padina Gymnospora ◽  
Polysaccharide Composition

AbstractSterile and fresh tissues of three marine macroalgae red, green and brown (Kappaphycus alvarezii, Kappaphycus striatus and Padina gymnospora) collected from Malaysia east costal seas were compared for the antioxidants and polysaccharide composition of sugars as well as the active components. Results obtained showed that polysaccharides isolated from Kappaphycus alvarezii, Kappaphycus striatus and Padina gymnospora) can be used as a source of natural antioxidant compounds as they possess antioxidant potential in which the Padina gymnospora showed 15.56 ± 0.12 mg/mL to be the best antioxidants among all the polysaccharides studied. The hot water extraction method is effective in isolating polysaccharides from studied seaweeds. The GC–MS analysis revealed that there is presence of chemical compounds such as furfural was 25.53% in Kappaphycus alvarezii and 21.04% in Kappaphycus striatus also Padina gymnospora incorporates n- Hexadecanoic acid about 26.31% in seaweed polysaccharides that contribute to their antioxidant activities. Further studies can be done on determining the seaweed species that are available abundantly with the best source of natural antioxidant compounds.

scholarly journals EXTRACTION AND CHARACTERIZATION OF FUNCTIONAL PROPERTIES OF CARRAGEENAN Kappaphycus alvarezii FROM COAST OF KUTAI TIMUR DISTRICT

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Andi Noor Asikin ◽  
Indrati Kusumaningrum ◽  
Doddy Sutono
Keyword(s):  
Experimental Design ◽  
Functional Properties ◽  
Kappaphycus Alvarezii ◽  
Extraction Process ◽  
Binding Agent ◽  
Sulphate Content ◽  
Red Seaweeds ◽  
Carrageenan Quality

Carrageenan is a gelling form of polysaccharide obtained from extraction process of red seaweeds (Rhodophyceae) including Kappaphycus alvarezii. Carrageenan is widely used for pharmacy, cosmetics,  food,  gelling,  and  binding  agent  as  well  as  emulsifier  and  stabi-lizer. The quality of carrageenan is affected by several factors, one of them such as concen-tration of KOH. The objectives of this research were to define the best concentration of KOH for extraction and characterize the functional properties. Functional properties of carrageen-an in this research were sulphate content, acid insoluble ash, gell strength, fiber, and whiteness. The experimental design used for this research was completely ran-domized design with four treatments of KOH concentrations i.e. 1%, 3%, 5%, and 7%.  The study showed that the use of KOH concentarion of 7% resulted the best of carrageenan quality containing 24.36% sulphate, 1.96% acid insoluble ash, 17.80 g/cm2 gell strength, 8.94% fiber and 58.91% whiteness. Keywords: carrageenan, extraction, functional properties, Kalium Hydroxide, Kappaphycus alvarezii

scholarly journals Assessment of Heavy Metal Contamination in Red Seaweeds from the Coastal Areas of Zanzibar by Using EDXRF Technique

2021 ◽  
pp. 1-9
Author(s):  
Suleiman A. Suleiman ◽  
Salum K. Salum ◽  
Miza A. Kombo ◽  
Atumaini A. Makoba ◽  
Fatma O. Khamis
Keyword(s):  
Heavy Metals ◽  
Coastal Area ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Kappaphycus Alvarezii ◽  
Marine Ecosystem ◽  
Eucheuma Denticulatum ◽  
Red Seaweeds ◽  
Waste Effluents ◽  
Edxrf Technique

The content of Mn, Zn, Ni, Cu, Fe, and Pb in 10 samples of Kappaphycus alvarezii (cottonii) and 10 samples of Eucheuma denticulatum (spinosum) from 15 different sites in the intertidal coastal area of Zanzibar were determined by using EDXRF. The heavy metals assessed in both species decreased in the order of Fe >Mn > Zn >Pb> Cu > Ni. In general, the cottonii samples in Unguja had significantly higher (p ≤ 0.05) concentrations of Fe, Zn, Ni, Cu and Pb than the spinosum samples, but the latter had significantly higher levels of Mn. Similarly, the cottonii samples in Pemba had significantly higher (p ≤ 0.05) concentrations of Ni, Cu and Pb than the spinosum samples, but the latter had significantly higher levels of Fe and Zn. The concentrations of heavy metals in cottonii and spinosum in the present study were noticed lower compared to publish results. The results from this study revealed that, the heavy metals contaminations in cottonii and spinosum along the coastal area in Zanzibar were mainly caused by effluents that directly flow into marine environments. Hence, serious measures should be taken to reduce the flow of waste effluents into the marine ecosystem.

scholarly journals Antioxidant Activity of Natural Products Isolated from Red Seaweeds

2014 ◽  
Vol 9 (7) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Caio Cesar Richter Nogueira ◽  
Izabel Christina Nunes de Palmer Paixão ◽  
Valéria Laneuville Teixeira
Keyword(s):  
Antioxidant Activity ◽  
Natural Products ◽  
Antioxidant Activities ◽  
Red Seaweeds

The present work describes more than 60 natural products from marine red seaweeds (Rhodophyta) and their antioxidant activities. The results indicate that algae belonging to the order Ceramiales, family Rhodomelaceae are the most promising as potential producers of antioxidants. This activity seems to be related to the ability to synthesize polyphenols and their derivatives, as bromophenols.

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