On the Chemical Profile of Marine Organisms from Coastal Subtropical Environments: Gross Composition and Nitrogen-to-Protein Conversion Factors

Diniz, Graciela S.; Barbarino, Elisabete; Lourenço, Simone de Queiroz Chaves

doi:10.5772/29294

Cited by 6 publications

(2 citation statements)

References 67 publications

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“…In this study, the red alga G. griffithsiae tended to show higher concentrations of tissue nitrogen and phosphorus than the green algae. This is in accordance with studies of Diniz et al [52] and Lourenço et al [34] who characterized the chemical composition of seaweeds from Brazilian coastal environments. Rhodophytes tended to show more nitrogen-bearing pigments and higher concentrations of hydrosoluble protein.…”

Section: Total Tissue Nitrogen and Phosphorus In The Seaweedssupporting

confidence: 93%

Temporal Variations of the Chemical Composition of Three Seaweeds in Two Tropical Coastal Environments

Nascimento¹,

Coelho-Gomes²,

Barbarino³

et al. 2014

OJMS

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The seaweeds Chaetomorpha antennina, Gymnogongrus griffithsiae and Ulva fasciata were studied regarding tissue concentrations of total nitrogen, total phosphorus, total protein, hydrosoluble protein, total carbohydrate, chlorophyll a and total carotenoid throughout a 39-month survey in two coastal environments of Rio de Janeiro State, Brazil. One of the sites (Itapuca Stone) has high concentrations of dissolved nutrients and an intense long-term process of cultural eutrophication; the second site (Bananal Inlet) is thought to have lower concentrations of dissolved nutrients and no relevant anthropic impact. Seaweeds experienced changes in the concentrations of the substances in the thalli; however they did not show any cyclic seasonal pattern, except for pigments, with lower values in summer in both sites. The differences found for each species in each sampling at the sites were small (e.g. U. fasciata, more total nitrogen at Itapuca Stone) or absent (e.g. C. antennina, no significant differences for hydrosoluble protein in the sites). Differences in the concentrations of dissolved nutrients in the sites did not generate contrasting chemical profiles in the seaweeds. There is no evidence of nitrogen-or phosphorus-limitation in any season. It is presumable that the concentrations of dissolved nutrients at the nutrient-poorer site are sufficient to generate high concentrations of the substances in the thalli of the species tested, similar to the concentrations measured in the eutrophic site. Experimental data are needed to elucidate the factors that promote the success of the species tested under contrasting nutrient availability and environmental disturbance.

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Section: Total Tissue Nitrogen and Phosphorus In The Seaweedssupporting

confidence: 93%

Temporal Variations of the Chemical Composition of Three Seaweeds in Two Tropical Coastal Environments

Nascimento¹,

Coelho-Gomes²,

Barbarino³

et al. 2014

OJMS

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“…Evaluation of mineral composition of H.atra is presented in Table 3. It has been reported in various studies that sea cucumbers are also a source of minerals, in general, composition is influenced by a number of factors such as physiological factors, environmental conditions, habitat and life cycle [27]. Sodium (Na) was the largest in the composition followed by Calcium (Ca), Magnesium (Mg), Potassium (K), Zinc (Zn), Iron (Fe), Copper (Cu), Selenium (Se) and Manganese (Mn).…”

Section: Mineral Analysismentioning

confidence: 99%

Holothuria atra: An Underutilized Marine Resource for Nutritional and Collagen Benefits

Jayathilake,

Wimalagunarathna,

Wijesekara

et al. 2023

AJB2T

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Aims: To assess the nutritional content in the body wall of an underutilized sea cucumber species: Holothuria atra and to extract and characterize the potential collagen types from the body wall Study Design: The specimens of H.atra were identified based on morphology and the nutritionally analyzed with respect to lipid profile, vitamins, minerals, and carbohydrates. H. atra body wall was used to extract collagen and later characterized. Place and Duration of Study: Samples were collected at Mannar, Sri Lanka. Study was conducted at the Department of Zoology, University of Sri Jayewardenepura, Sri Lanka. Methodology: Nutritional content in the body wall (proximate analysis, lipid profile, vitamins, minerals, and carbohydrates) was analyzed using biochemical assays. Moreover, H.atra body wall was used to extract collagen, by acid soluble collagen extraction and characterized by physico- chemical methods. Results: The results showed that body wall tissues of H.atra contained high moisture level (83.2%), proteins (10.2%) and low levels of fat (2.0%) and carbohydrates (2.1%). Further, flesh contains, 0.4% saturated fatty acids, 0.4% unsaturated fatty acids, considerable amount of Calcium, Magnesium and Sodium. Collagen yield from the body wall was recorded as 0.95% and fibrils observed as irregular and dense with a loose and porous structure. Attenuate Total Reflectance-Fourier Transform Infrared Spectroscopy and Ultra Violet Vis spectroscopy indicated the collagen was Type I. Conclusion: Results suggest that underutilized, non-commercial H.atra is a potential nutritional source and it contains type I collagen. Further studies are underway to increase the collagen yield from H.atra and to develop a collagen membrane which can be used in future industrial applications.

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Fucoidan Content from Brown Seaweed (Sargassum filipendula) And Its Potential As Radical Scavenger

Laeliocattleya

Yunianta

Suloi

et al. 2020

J. Phys.: Conf. Ser.

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On the Chemical Profile of Marine Organisms from Coastal Subtropical Environments: Gross Composition and Nitrogen-to-Protein Conversion Factors

Cited by 6 publications

References 67 publications

Temporal Variations of the Chemical Composition of Three Seaweeds in Two Tropical Coastal Environments

Temporal Variations of the Chemical Composition of Three Seaweeds in Two Tropical Coastal Environments

Holothuria atra: An Underutilized Marine Resource for Nutritional and Collagen Benefits

Fucoidan Content from Brown Seaweed (Sargassum filipendula) And Its Potential As Radical Scavenger

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