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Biblioteca(s): |
Embrapa Agroindústria de Alimentos; Embrapa Pecuária Sudeste. |
Data corrente: |
19/10/2011 |
Data da última atualização: |
26/07/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 5 |
Autoria: |
DINIZ, G. S.; BARBARINO, E.; OIANO NETO, J.; PACHECO, S.; LOURENÇO, S. O. |
Afiliação: |
GRACIELA S. DINIZ, DEPTO. BIOLOGIA MARINHA, UFF, RJ.; ELISABETE BARBARINO, DETO. BIOLOGIA MARINHA, UFF, RJ.; JOAO OIANO NETO, CPPSE; SIDNEY PACHECO, CTAA; SERGIO O. LOURENÇO, DEPTO. BIOLOGIA MARINHA, UFF, RJ. |
Título: |
Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
American Journal of Plant Sciences, v. 2, n. 3, sep., 2011. |
Páginas: |
p. 287-296 |
DOI: |
10.4236/ajps.2011.23032 |
Idioma: |
Inglês |
Conteúdo: |
Despite decades of research on marine algae, there are still significant gaps in basic knowledge about chemical com-position of these organisms, especially in tropical environments. In this study, the amino acid composition and contents of total nitrogen, phosphorus, lipid, carbohydrate and protein were determined in Asparagopsis taxiformis, Centroceras clavulatum, Chaetomorpha aerea, Sargassum filipendula and Spyridia hypnoides. The seaweeds showed low lipid con-tents (lower than 5.5% d.w. in all species) and were rich in carbohydrates (more than 16% d.w. in all seaweeds). The percentage of nitrogen, phosphorus and protein varied widely among species, which red algae showed the highest con-centrations. The amino acid composition was similar among the seaweeds, which glutamic acid, aspartic acid and leu-cine as the most abundant. All species are poor in histidine. An average of 24.2% of the total nitrogen is non-proteinaceous. From data of total amino acid and total nitrogen, specific nitrogen-to-protein conversion factors were calculated for each species. The nitrogen-to-protein conversion factors calculated ranged from 4.51 to 5.21, with an overall average of 4.86. These findings show that the traditional conversion factor of 6.25 should be avoided for seaweeds, since it overestimates the actual protein content. |
Palavras-Chave: |
Amino Acid; Element Composition; Nitrogen to Protein Conversion Factors; Protein; Seaweeds; Tropical Environment. |
Thesagro: |
Alga marinha; Aminoácido; Proteína. |
Thesaurus NAL: |
Amino acids; Macroalgae; Proteins. |
Categoria do assunto: |
W Química e Física X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/43841/1/PROCIJON2011.00116.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/47169/1/2011-058.pdf
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Marc: |
LEADER 02286naa a2200337 a 4500 001 1903473 005 2022-07-26 008 2011 bl uuuu u00u1 u #d 024 7 $a10.4236/ajps.2011.23032$2DOI 100 1 $aDINIZ, G. S. 245 $aGross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds. 260 $c2011 300 $ap. 287-296 520 $aDespite decades of research on marine algae, there are still significant gaps in basic knowledge about chemical com-position of these organisms, especially in tropical environments. In this study, the amino acid composition and contents of total nitrogen, phosphorus, lipid, carbohydrate and protein were determined in Asparagopsis taxiformis, Centroceras clavulatum, Chaetomorpha aerea, Sargassum filipendula and Spyridia hypnoides. The seaweeds showed low lipid con-tents (lower than 5.5% d.w. in all species) and were rich in carbohydrates (more than 16% d.w. in all seaweeds). The percentage of nitrogen, phosphorus and protein varied widely among species, which red algae showed the highest con-centrations. The amino acid composition was similar among the seaweeds, which glutamic acid, aspartic acid and leu-cine as the most abundant. All species are poor in histidine. An average of 24.2% of the total nitrogen is non-proteinaceous. From data of total amino acid and total nitrogen, specific nitrogen-to-protein conversion factors were calculated for each species. The nitrogen-to-protein conversion factors calculated ranged from 4.51 to 5.21, with an overall average of 4.86. These findings show that the traditional conversion factor of 6.25 should be avoided for seaweeds, since it overestimates the actual protein content. 650 $aAmino acids 650 $aMacroalgae 650 $aProteins 650 $aAlga marinha 650 $aAminoácido 650 $aProteína 653 $aAmino Acid 653 $aElement Composition 653 $aNitrogen to Protein Conversion Factors 653 $aProtein 653 $aSeaweeds 653 $aTropical Environment 700 1 $aBARBARINO, E. 700 1 $aOIANO NETO, J. 700 1 $aPACHECO, S. 700 1 $aLOURENÇO, S. O. 773 $tAmerican Journal of Plant Sciences$gv. 2, n. 3, sep., 2011.
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Embrapa Pecuária Sudeste (CPPSE) |
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