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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
24/02/1999 |
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Data da última atualização: |
08/08/2023 |
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Autoria: |
GIVENS, D. I.; BAKER, C. W.; ZAMIME, B. |
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Título: |
Regions of normalised near infrared reflectance difference spectra related to the rumen digestion of straws. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Animal Feed Science and Technology, v. 36, n. 1/2, p. 1-12, Feb. 1992. |
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DOI: |
https://doi.org/10.1016/0377-8401(92)90081-G |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The normalised and detrended (SNV-D) near infrared reflectance (NIR) spectra of partially rumen digested (0, 3, 8, 16, 24, 45 and 72 h incubations) residues often cereal straws (eight barley, two wheat) untreated and treated with ammonia were obtained. Cell wall fractions were also determined on the residues. For each straw the spectra of the 0 h incubation (washed in water only) was subtracted from the spectra relating to the other incubation times. This resulted in a clear pictorial image of the time course of digestion of the water-insoluble fraction of the straws. The SNV-D difference spectra was compared with similarly obtained difference spectra for simple log 1/R values and second derivative log 1/R values. The SNV-D spectral regions which became increasingly positive with digestion time were centred around 1672 and 2254 nm. These regions appear to indicate increased concentrations of indigestible cell wall material and changes in lignin content accounted for 90?94% of the variability in the 2254 nm peak amplitude. Spectral regions centred around 1498 and 2086 nm became increasingly negative with digestion time and the shape of these SNV-D difference spectra corresponded well with the SNVD spectra of glucose and xylose. The important spectral regions were identical in untreated and ammonia-treated straws, although the changes tended to be of greater magnitude in treated material. It was concluded that SNV-D difference spectra can describe the time course of rumen digestion in spectral terms and the important spectral regions identified give a biological basis to the statistical wavelength selection used for prediction of digestibility. MenosAbstract: The normalised and detrended (SNV-D) near infrared reflectance (NIR) spectra of partially rumen digested (0, 3, 8, 16, 24, 45 and 72 h incubations) residues often cereal straws (eight barley, two wheat) untreated and treated with ammonia were obtained. Cell wall fractions were also determined on the residues. For each straw the spectra of the 0 h incubation (washed in water only) was subtracted from the spectra relating to the other incubation times. This resulted in a clear pictorial image of the time course of digestion of the water-insoluble fraction of the straws. The SNV-D difference spectra was compared with similarly obtained difference spectra for simple log 1/R values and second derivative log 1/R values. The SNV-D spectral regions which became increasingly positive with digestion time were centred around 1672 and 2254 nm. These regions appear to indicate increased concentrations of indigestible cell wall material and changes in lignin content accounted for 90?94% of the variability in the 2254 nm peak amplitude. Spectral regions centred around 1498 and 2086 nm became increasingly negative with digestion time and the shape of these SNV-D difference spectra corresponded well with the SNVD spectra of glucose and xylose. The important spectral regions were identical in untreated and ammonia-treated straws, although the changes tended to be of greater magnitude in treated material. It was concluded that SNV-D difference spectra can describe the time course of ... Mostrar Tudo |
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Palavras-Chave: |
Infrared spectrophotometry; NIR; NIRS. |
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Thesagro: |
Análise Química; Nutrição. |
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Thesaurus Nal: |
Near-infrared spectroscopy; Ruminant nutrition. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02450naa a2200241 a 4500
001 1523982
005 2023-08-08
008 1992 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/0377-8401(92)90081-G$2DOI
100 1 $aGIVENS, D. I.
245 $aRegions of normalised near infrared reflectance difference spectra related to the rumen digestion of straws.$h[electronic resource]
260 $c1992
520 $aAbstract: The normalised and detrended (SNV-D) near infrared reflectance (NIR) spectra of partially rumen digested (0, 3, 8, 16, 24, 45 and 72 h incubations) residues often cereal straws (eight barley, two wheat) untreated and treated with ammonia were obtained. Cell wall fractions were also determined on the residues. For each straw the spectra of the 0 h incubation (washed in water only) was subtracted from the spectra relating to the other incubation times. This resulted in a clear pictorial image of the time course of digestion of the water-insoluble fraction of the straws. The SNV-D difference spectra was compared with similarly obtained difference spectra for simple log 1/R values and second derivative log 1/R values. The SNV-D spectral regions which became increasingly positive with digestion time were centred around 1672 and 2254 nm. These regions appear to indicate increased concentrations of indigestible cell wall material and changes in lignin content accounted for 90?94% of the variability in the 2254 nm peak amplitude. Spectral regions centred around 1498 and 2086 nm became increasingly negative with digestion time and the shape of these SNV-D difference spectra corresponded well with the SNVD spectra of glucose and xylose. The important spectral regions were identical in untreated and ammonia-treated straws, although the changes tended to be of greater magnitude in treated material. It was concluded that SNV-D difference spectra can describe the time course of rumen digestion in spectral terms and the important spectral regions identified give a biological basis to the statistical wavelength selection used for prediction of digestibility.
650 $aNear-infrared spectroscopy
650 $aRuminant nutrition
650 $aAnálise Química
650 $aNutrição
653 $aInfrared spectrophotometry
653 $aNIR
653 $aNIRS
700 1 $aBAKER, C. W.
700 1 $aZAMIME, B.
773 $tAnimal Feed Science and Technology$gv. 36, n. 1/2, p. 1-12, Feb. 1992.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 5 | |
| 1. |  | SANTOS, V. C. dos; THOMAZINI, M. J. Abundância das principais espécies de moscas-brancas em culturas de importância agrícola no sudeste acreano. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA PIBIC/CNPQ/UFAC/EMBRAPA, 15.; MOSTRA DE PESQUISA E PÓS-GRADUAÇÃO, 5., 2006, Rio Branco, AC. Novos rumos, novos caminhos na ciência, tecnologia & inovação: anais. Rio Branco, AC: Ufac, 2006. 1 p. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| 2. | | COSTA, G. A. da; SANTOS, V. C. dos; SCHULTZ, E. L.; SOARES, I. P. Reforma a vapor do biogás usando catalisadores de óxidos mistos Ni/Mg-La para produção de gás de síntese. In: ENCONTRO DE PESQUISA E INOVAÇÃO DA EMBRAPA AGROENERGIA, 4.,2017, Brasília, DF. Anais... Brasília, DF: Embrapa, 2017. p. 115-120.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agroenergia. |
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| 3. | | SANTOS, V. C. dos; SAMPAIO, B. L.; COSTA, G. A. da; SCHULTZ, E. L.; SOARES, I. P. Uso de catalisadores multifuncionais à base de Ni e Mo para a produção de diesel verde pelo processo de hidrodesoxigenação a partir de materiais residuais da produção de biodiesel. In: ENCONTRO DE PESQUISA E INOVAÇÃO DA EMBRAPA AGROENERGIA, 4.,2017, Brasília, DF. Anais... Brasília, DF: Embrapa, 2017. p. 148-153.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agroenergia. |
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| 4. | | HAJI, F. N. P.; MOREIRA, A. N.; ALENCAR, J. A. de; MOREIRA, F. R. B.; LEITE, E. M.; COSTA, T. A. S.; FERREIRA, R. C. F.; LOPES, L. M. da M.; SANTOS, C. A. P. dos; SANTOS, V. C. dos. Monitoramento das pragas da videira no contexto da produção integrada de frutas. In: SEMANA INTERNACIONAL DA FRUTICULTURA, FLORICULTURA E AGROINDÚSTRIA. 9.,; SIMPÓSIO DE INOVAÇÕES TECNOLÓGICAS E GERENCIAIS, 2., 2002, Fortaleza. Frutal 2002. Fortaleza : Embrapa Agroindústria Tropical; Instituto Frutal; SINDIFRUTA, 2002. CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 5. | | HAJI, F. N. P.; COSTA, V. S. de O.; LOPES, P. R. C.; MOREIRA, A. N.; SANTOS, V. C. dos; SANTOS, C. A. P. dos; ALENCAR, J. A. de; BARBOSA, F. R. A produção integrada de uvas finas de mesa, no Submédio do Vale do São Francisco. In: SEMINÁRIO BRASILEIRO SOBRE PRODUÇÃO INTEGRADA DE FRUTAS, 5., 2003, Bento Gonçalves. Anais... Bento Gonçalves: Embrapa Uva e Vinho, 2003. p. 103. (Embrapa Uva e Vinho. Documentos, 39).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 5 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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