Data/hora: 16/06/2024 16:29:17

Biblioteca(s): | Embrapa Agroindústria de Alimentos; Embrapa Pecuária Sudeste.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | B - 5
Data corrente: | 19/10/2011
Data da última atualização: | 26/07/2022
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:

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/43841/1/PROCIJON2011.00116.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/47169/1/2011-058.pdf

Registro original: | Embrapa Pecuária Sudeste (CPPSE)

Exemplares:

CPPSE - (20632-1) - UPC - AP - DD - PC.CTAA-2011.00116 - DIN - 2011.00116 - DIS
CTAA - (11032-1) - UPC - AP - PP - 2011/058 -  - 2011.00360 - DIS