Biochemical composition of some Egyptian seaweeds with potent nutritive and antioxidant properties

Ismail, Gehan A.

doi:10.1590/1678-457x.20316

Cited by 48 publications

(31 citation statements)

References 41 publications

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“…Marine algae are the most important source of carbohydrates. The marine carbohydrates demonstrate a wide spectrum of industrial, biomedical, and biological applications [26,27]. Many algal soluble polysaccharides are found to be related to hypercholesterolemia and hypoglycemic activities [26].…”

Section: Phytochemical Analysismentioning

confidence: 99%

Phytochemical Screening and Heavy Metal Analysis of Ulva Reticulata

Gomathi

2018

Asian J Pharm Clin Res

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Objective: Ulva reticulata is a marine edible green seaweed widely distributed along the coastal lines of India. The present study was designed to screen the phytochemicals and evaluate heavy metals content of U. reticulata collected from Rameshwaram, Tamil Nadu, India, in the perspective of assessing their therapeutic value and/or safety in relation to its uses. Method:The seaweed sample was subjected to extraction with solvents of different polarities (methanol, ethanol, acetone, chloroform, and petroleum ether) and screened for phytochemicals according to standard methods. Heavy metal analysis was also performed with the dried sample powder using inductively coupled plasma optical emission spectrophotometer (ICP-OES).Result: Preliminary phytochemical analysis revealed the presence of reducing sugar, proteins, flavonoids, glycosides, alkaloids, and anthraquinones. ICP-OES indicated the seaweed to contain relative amount of heavy metals in the order of iron (Fe) > chromium (Cr) > Zinc (Zn) > nickel (Ni) > copper (Cu) > lead (Pb) -cadmium (Cd) and is within the permissible limits set by the WHO/FAO, except Fe and Cr. Conclusion:The different solvent extracts of U. reticulata showed the presence of the number of phytochemicals. Furthermore, the present study has revealed the presence of heavy metals in U. reticulata which can be a representative picture of the dissolved metals in the aquatic phase.

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Section: Phytochemical Analysismentioning

confidence: 99%

Phytochemical Screening and Heavy Metal Analysis of Ulva Reticulata

Gomathi

2018

Asian J Pharm Clin Res

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“…The most abundant six constituents were n-nonadecane (RT = 16.95 min), 1,2,3-propanetricarboxylic acid, 2-(acetyloxy)-, tributyl ester (RT = 27.18 min), 2methylhexadecan-1-ol (RT = 22.18 min), 1-docosene (RT = 25.89 min), 1-eicosanol (RT = 29.20 min) and chloroacetic acid, octadecyl ester (RT = 18.58 min). Ismail (2017) reported that C. officinalis contains high content of carotenoid (3.8 mg/g dry wt. ), β-Carotene (3940.12 IU/100 g) and carbohydrates (27.98% of dry wt.).…”

Section: Gc/ms Analysis Of the C Officinalis Dichloromethane Extractmentioning

confidence: 99%

GC/MS identification and applications of bioactive seaweed extracts from Mediterranean coast of Egypt

Hassan

Shobier

2018

Egypt. J. of Aquatic Biolo. and Fish.

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The antibacterial activity of different seaweed species against five fish pathogens (A. hydrophila, V. parahaemolyticus, V. alginolyticus, V. damsela and Vibrio sp.) has been evaluated. The ethanolic extract of C. sinuosa (CSE1) and dichloromethane extract of C. officinalis (COM) exhibited the highest antibacterial activity with activity index (AI) = 1.4 ±0.74 and 1.2 ±0.71, respectively. When the extracts were encapsulated into calcium alginate beads their antibacterial activity against the most susceptible bacterial pathogens showed that the significant growth inhibition was against V. parahaemolyticus after 5 min post addition of the beads recording 1.4 and 2 fold decrease in the growth, respectively. Recycling of the (CA/COM) beads was carried out for 7 successive cycles with success in elimination of V. parahaemolyticus. The potential applications of encapsulated extracts for elimination of microbial load in fish rearing water and antifouling activity were proved in the current investigation. The chemical composition of the bioactive extracts (CSE1) and (COM) was determined using GC/MS analysis which revealed the presence of several constituents that have been reported to exhibit antimicrobial activity. Additionally, the dichloromethane extract (COM) produced six major components including n-nonadecane, 1,2,3propanetricarboxylic acid, 2-(acetyloxy)-, tributyl ester, 2-methylhexadecan-1-ol, 1-docosene, 1-eicosanol and chloroacetic acid, octadecyl ester. However, the ethanolic extract (CSE1) was characterized by the presence of fatty acids, fatty acids ethyl esters and aromatic hydrocarbon where the most abundant compound was n-tridecanoic acid ethyl ester.

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“…The aqueous, ethanolic, and EtAc extracts were evaluated for the presence of phytoconstituents such as alkaloids, carbohydrates, proteins, phenol, anthraquinones, coumarins, flavonoids, saponins, tannins, terpenes, reducing sugars, and glycosides using standard qualitative methods [17,18]. [19,20] …”

Section: Preliminary Phytochemical Screeningmentioning

confidence: 99%

Assessment of Phytochemical Constituents, in Vitro Antimicrobial and Antioxidant Potential of Ulva Extracts From Vishakhapatnam Coast

Princely¹,

Dhanaraju²

2017

Asian J Pharm Clin Res

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Objective: Antimicrobial drug resistance is the foremost problem faced worldwide with the current antibiotic therapy in treating infectious diseases. Marine algae were considered as a potential source of biologically active compounds with antibacterial, antifungal, antiviral, and anticancer activities. Materials and Methods:In the present investigation, the purified fractions of marine algal crude extracts of different solvents such as aqueous, ethyl acetate (EtAc), and ethanol for antioxidant (1,1-diphenyl-2-picrylhydrazyl radical scavenging assay) and antimicrobial activities (agar well diffusion assay) were evaluated. Results:The extracts of EtAc, ethanol, and water showed minimum inhibitory concentration values of 3.125, 6.25, and 12.25 µg/ml, respectively, for tested bacterial pathogens. The active fractions showed very little activity against Klebsiella pneumonia and Salmonella Typhi, and no activity was observed against Pseudomonas aeruginosa. The results of our screening showed that the EtAc marine algal fractions were active against some Grampositive, Gram-negative bacteria and Candida albicans. The phytochemical analysis of aqueous, ethanolic, and EtAc extracts of marine algae showed the presence of the various phytochemical constituents such as carbohydrates, phenols, and amino acids. The ethanolic extracts showed the highest antioxidant activity as compared to aqueous and EtAc extracts. Conclusion:This work can be extended further to isolate, characterize, and discover more bioactive metabolites from marine algae, which can be exploited for the production of lead molecules in pharmaceuticals for the treatment of chronic diseases.

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Biochemical composition of some Egyptian seaweeds with potent nutritive and antioxidant properties

Cited by 48 publications

References 41 publications

Phytochemical Screening and Heavy Metal Analysis of Ulva Reticulata

Phytochemical Screening and Heavy Metal Analysis of Ulva Reticulata

GC/MS identification and applications of bioactive seaweed extracts from Mediterranean coast of Egypt

Assessment of Phytochemical Constituents, in Vitro Antimicrobial and Antioxidant Potential of Ulva Extracts From Vishakhapatnam Coast

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