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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
28/08/2023 |
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Data da última atualização: |
28/08/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PORTO, B. L. S.; FARIA, I. D. L.; SOUZA, J. C. Q. DE; MOREIRA, O. B. DE O.; GAMA, M. A. S. da; OLIVEIRA, M. A. L. DE. |
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Afiliação: |
BRENDA LEE SIMAS PORTO, Universidade Federal de Juiz de Fora; ISAURA DANIELE LEITE FARIA, Universidade Federal de Juiz de Fora; JÉSSICA CORDEIRO QUEIROZ DE SOUZA, Universidade Federal de Juiz de Fora; OLÍVIA BRITO DE OLIVEIRA MOREIRA, Universidade Federal de Juiz de Fora; MARCO ANTONIO SUNDFELD DA GAMA, CPPSE; MARCONE AUGUSTO LEAL DE OLIVEIRA, Universidade Estadual de Campinas. |
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Título: |
Rapid method for simultaneous determination of CIS-9, TRANS-11 and TRANS-10, CIS-12 conjugated linoleic acid isomers in milk by GC-FID. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Química Nova, v. 7, p. 743-746, 2023. |
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DOI: |
10.21577/0100-4042.20230026 |
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Idioma: |
Inglês |
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Conteúdo: |
Ruminant milk is the lead source of conjugated linoleic acid (CLA) in the human diet, with cis-9, trans-11 CLA being the major among all. Small amounts of trans-10, cis-12 CLA are also found in synthetic supplements. Since both isomers are biologically active with potential health benefits, there is great interest in quantifying them for quality control routines. An alternative method for the analysis of the aforementioned CLAs by fast gas chromatography (GC) is discussed in the present study. The fatty acid methyl ester mixture obtained by alkaline catalysis was injected into a GC equipped with a flame ionization detector (FID) and fitted with an ionic liquid SLB-IL111 chromatographic column (15 m × 0.10 mm × 0.08 µm). Separation was achieved in less than 5 min using a 168 °C isotherm run. Both CLA isomers were quantified by using of single point standard addition statistical approach. Results were contested to those obtained using the recommended 100 m long CP-Sil88 capillary column and none evidence of significant differences was found within 95% confidence interval. Therefore, the proposed method could be valuable to focused regulatory routines of large numbers of samples with greater analytical frequency. |
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Palavras-Chave: |
CLA; Fast GC; SLB IL111. |
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Thesaurus Nal: |
Fatty acids; Milk. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1156165/1/RapidMethod.pdf
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Marc: |
LEADER 01999naa a2200253 a 4500
001 2156165
005 2023-08-28
008 2023 bl uuuu u00u1 u #d
024 7 $a10.21577/0100-4042.20230026$2DOI
100 1 $aPORTO, B. L. S.
245 $aRapid method for simultaneous determination of CIS-9, TRANS-11 and TRANS-10, CIS-12 conjugated linoleic acid isomers in milk by GC-FID.$h[electronic resource]
260 $c2023
520 $aRuminant milk is the lead source of conjugated linoleic acid (CLA) in the human diet, with cis-9, trans-11 CLA being the major among all. Small amounts of trans-10, cis-12 CLA are also found in synthetic supplements. Since both isomers are biologically active with potential health benefits, there is great interest in quantifying them for quality control routines. An alternative method for the analysis of the aforementioned CLAs by fast gas chromatography (GC) is discussed in the present study. The fatty acid methyl ester mixture obtained by alkaline catalysis was injected into a GC equipped with a flame ionization detector (FID) and fitted with an ionic liquid SLB-IL111 chromatographic column (15 m × 0.10 mm × 0.08 µm). Separation was achieved in less than 5 min using a 168 °C isotherm run. Both CLA isomers were quantified by using of single point standard addition statistical approach. Results were contested to those obtained using the recommended 100 m long CP-Sil88 capillary column and none evidence of significant differences was found within 95% confidence interval. Therefore, the proposed method could be valuable to focused regulatory routines of large numbers of samples with greater analytical frequency.
650 $aFatty acids
650 $aMilk
653 $aCLA
653 $aFast GC
653 $aSLB IL111
700 1 $aFARIA, I. D. L.
700 1 $aSOUZA, J. C. Q. DE
700 1 $aMOREIRA, O. B. DE O.
700 1 $aGAMA, M. A. S. da
700 1 $aOLIVEIRA, M. A. L. DE
773 $tQuímica Nova$gv. 7, p. 743-746, 2023.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
21/10/2022 |
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Data da última atualização: |
21/10/2022 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
CANTARUTTI, R. B.; TARRÉ, R. M.; MACEDO, R. B.; REZENDE, C. de P.; PEREIRA, J. M.; FERREIRA, E.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Afiliação: |
UFV; UFV; UFV; BOLSISTA EMBRAPA AGROBIOLOGIA; BRUNO JOSE RODRIGUES ALVES, CNPAB; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ROBERT MICHAEL BODDEY, CNPAB. |
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Título: |
Forage legume presence and grazing intensity effect on nitrogen dynamics in brachiaria pastures in the South of Bahia, Brazil |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
In: INTERNATIONAL GRASSLAND CONGRESS PROCEEDINGS, 24; INTERNATIONAL RANGELAND CONGRESS, 11, 2021 kentucky. Sustainable Use of Grassland and Rangeland Resources for Improved Livelihoods: proceeding...kentucky: University of kentucky, 2022. |
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Idioma: |
Português |
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Conteúdo: |
The objective of this study performed in the Atlantic forest region of the South of Bahia (Brazil) was to examine the influence of the presence of the forage legume Desmodium ovalifolium in pastures of Brachiaria humidicola on the nitrogen recycled through plant litter over stocking rates of 2, 3 and 4 head ha-1. The results demonstrated that the presence of the D. ovalifolium in the pasture significantly increased the protein content of the associated Brachiaria grass, and the rate and quantity of N recycled through the litter pathway. While had no significant increase in animal weight gain due this legume, the increase in N recycled through the litter pathway should provide an increase in the sustainability of pasture production, especially at the lower stocking rate where the grazing pressure was lower and the proportion of legume was higher. |
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Palavras-Chave: |
Produção de pastagem; South of Bahia State. |
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Thesaurus NAL: |
Forage production. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01804nam a2200241 a 4500
001 2147591
005 2022-10-21
008 2022 bl uuuu u00u1 u #d
100 1 $aCANTARUTTI, R. B.
245 $aForage legume presence and grazing intensity effect on nitrogen dynamics in brachiaria pastures in the South of Bahia, Brazil$h[electronic resource]
260 $aIn: INTERNATIONAL GRASSLAND CONGRESS PROCEEDINGS, 24; INTERNATIONAL RANGELAND CONGRESS, 11, 2021 kentucky. Sustainable Use of Grassland and Rangeland Resources for Improved Livelihoods: proceeding...kentucky: University of kentucky$c2022
520 $aThe objective of this study performed in the Atlantic forest region of the South of Bahia (Brazil) was to examine the influence of the presence of the forage legume Desmodium ovalifolium in pastures of Brachiaria humidicola on the nitrogen recycled through plant litter over stocking rates of 2, 3 and 4 head ha-1. The results demonstrated that the presence of the D. ovalifolium in the pasture significantly increased the protein content of the associated Brachiaria grass, and the rate and quantity of N recycled through the litter pathway. While had no significant increase in animal weight gain due this legume, the increase in N recycled through the litter pathway should provide an increase in the sustainability of pasture production, especially at the lower stocking rate where the grazing pressure was lower and the proportion of legume was higher.
650 $aForage production
653 $aProdução de pastagem
653 $aSouth of Bahia State
700 1 $aTARRÉ, R. M.
700 1 $aMACEDO, R. B.
700 1 $aREZENDE, C. de P.
700 1 $aPEREIRA, J. M.
700 1 $aFERREIRA, E.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
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Embrapa Agrobiologia (CNPAB) |
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