Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.

Detalhes bibliográficos
Autor(a) principal: DINIZ, G. S.
Data de Publicação: 2011
Outros Autores: BARBARINO, E., OIANO NETO, J., PACHECO, S., LOURENÇO, S. O.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/903473
Resumo: 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.
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spelling Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.Nitrogen to Protein Conversion FactorsProteinAmino AcidSeaweedsElement CompositionTropical EnvironmentDespite 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.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.DINIZ, G. S.BARBARINO, E.OIANO NETO, J.PACHECO, S.LOURENÇO, S. O.2022-07-26T18:19:50Z2022-07-26T18:19:50Z2011-10-192011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlep. 287-296American Journal of Plant Sciences, v. 2, n. 3, sep., 2011.http://www.alice.cnptia.embrapa.br/alice/handle/doc/90347310.4236/ajps.2011.23032enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2022-07-26T18:19:58Zoai:www.alice.cnptia.embrapa.br:doc/903473Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542022-07-26T18:19:58falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542022-07-26T18:19:58Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
title Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
spellingShingle Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
DINIZ, G. S.
Nitrogen to Protein Conversion Factors
Protein
Amino Acid
Seaweeds
Element Composition
Tropical Environment
title_short Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
title_full Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
title_fullStr Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
title_full_unstemmed Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
title_sort Gross chemical profile and calculation of nitrogen-to-protein conversion factors for five tropical seaweeds.
author DINIZ, G. S.
author_facet DINIZ, G. S.
BARBARINO, E.
OIANO NETO, J.
PACHECO, S.
LOURENÇO, S. O.
author_role author
author2 BARBARINO, E.
OIANO NETO, J.
PACHECO, S.
LOURENÇO, S. O.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv 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.
dc.contributor.author.fl_str_mv DINIZ, G. S.
BARBARINO, E.
OIANO NETO, J.
PACHECO, S.
LOURENÇO, S. O.
dc.subject.por.fl_str_mv Nitrogen to Protein Conversion Factors
Protein
Amino Acid
Seaweeds
Element Composition
Tropical Environment
topic Nitrogen to Protein Conversion Factors
Protein
Amino Acid
Seaweeds
Element Composition
Tropical Environment
description 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.
publishDate 2011
dc.date.none.fl_str_mv 2011-10-19
2011
2022-07-26T18:19:50Z
2022-07-26T18:19:50Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv American Journal of Plant Sciences, v. 2, n. 3, sep., 2011.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/903473
10.4236/ajps.2011.23032
identifier_str_mv American Journal of Plant Sciences, v. 2, n. 3, sep., 2011.
10.4236/ajps.2011.23032
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/903473
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv p. 287-296
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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