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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
14/12/2012 |
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Data da última atualização: |
14/12/2012 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PAULO, E. M.; BOFFO, E. F.; BRANCO, A.; VALENTE, A. M. M. P.; MELO, I. S. de; FERREIRA, A. G.; ROQUE, M. R. de A.; ASSIS, S. A. de. |
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Afiliação: |
ELINALVA M. PAULO, UEFS; ELISANGELA F. BOFFO, UFBA; ALEXSANDRO BRANCO, UEFS; ÂNGELA M. M. P. VALENTE; ITAMAR SOARES DE MELO, CNPMA; ANTONIO G. FERREIRA, UFSCar; MILTON R. A. ROQUE, UFBA; SANDRA A. DE ASSIS, UEFS. |
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Título: |
Production, extraction and characterization of exopolysaccharides produced by the native Leuconostoc pseudomesenteroides R2 strain. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 84, n. 2, p. 495-507, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: The genus Leuconostoc belongs to a group of lactic acid bacteria usually isolated from fermented vegetables, which includes species involved in the production of exopolysaccharides (EPS). These biopolymers possess considerable commercial potential. Because of the wide variety of industrial applications of EPS, this study aimed to produce and characterize the native exopolysaccharide strain Leuconostoc pseudomesenteroides R2, which was isolated from cabbage collected in a semi-arid region of Bahia. We employed the following conditions for the production of EPS: 10.7% sucrose, pH 8.2, without agitation and incubation at 28°C for 30 hours. The fermentation broth was treated with ethanol and generated two types of polysaccharide substances (EPS I and EPS II). The identification of EPS I and EPS II was conducted using FT-IR, 1H, 13C and DEPT-135 NMR spectra. The two substances were identified as linear dextran ? polysaccharides (1 ? 6) which indicated different characteristics with respect to thermal analysis and density of free packaging, viscosity and time of solubilization. Both dextrans are of low density, possess high thermal stability and exhibited the behavior characteristic of pseudoplastic polymers. |
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Palavras-Chave: |
Exopolysaccharide; Polymer. |
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Thesagro: |
Bactéria. |
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Thesaurus Nal: |
Biopolymers; dextran; Leuconostoc pseudomesenteroides. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/72397/1/2012AP52.pdf
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Marc: |
LEADER 02106naa a2200277 a 4500
001 1942711
005 2012-12-14
008 2012 bl uuuu u00u1 u #d
100 1 $aPAULO, E. M.
245 $aProduction, extraction and characterization of exopolysaccharides produced by the native Leuconostoc pseudomesenteroides R2 strain.$h[electronic resource]
260 $c2012
520 $aABSTRACT: The genus Leuconostoc belongs to a group of lactic acid bacteria usually isolated from fermented vegetables, which includes species involved in the production of exopolysaccharides (EPS). These biopolymers possess considerable commercial potential. Because of the wide variety of industrial applications of EPS, this study aimed to produce and characterize the native exopolysaccharide strain Leuconostoc pseudomesenteroides R2, which was isolated from cabbage collected in a semi-arid region of Bahia. We employed the following conditions for the production of EPS: 10.7% sucrose, pH 8.2, without agitation and incubation at 28°C for 30 hours. The fermentation broth was treated with ethanol and generated two types of polysaccharide substances (EPS I and EPS II). The identification of EPS I and EPS II was conducted using FT-IR, 1H, 13C and DEPT-135 NMR spectra. The two substances were identified as linear dextran ? polysaccharides (1 ? 6) which indicated different characteristics with respect to thermal analysis and density of free packaging, viscosity and time of solubilization. Both dextrans are of low density, possess high thermal stability and exhibited the behavior characteristic of pseudoplastic polymers.
650 $aBiopolymers
650 $adextran
650 $aLeuconostoc pseudomesenteroides
650 $aBactéria
653 $aExopolysaccharide
653 $aPolymer
700 1 $aBOFFO, E. F.
700 1 $aBRANCO, A.
700 1 $aVALENTE, A. M. M. P.
700 1 $aMELO, I. S. de
700 1 $aFERREIRA, A. G.
700 1 $aROQUE, M. R. de A.
700 1 $aASSIS, S. A. de
773 $tAnais da Academia Brasileira de Ciências, Rio de Janeiro$gv. 84, n. 2, p. 495-507, 2012.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Origem |
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Cutter |
Registro |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
03/07/2018 |
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Data da última atualização: |
03/07/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
COELHO, A. A.; TRINDADE, J. P. P.; VOLK, L. B. da S.; PINHEIRO, C. L.; QUADROS, F. L. F. de. |
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Afiliação: |
André Alfredo Coelho, UFSM; JOSE PEDRO PEREIRA TRINDADE, CPPSUL; LEANDRO BOCHI DA SILVA VOLK, CPPSUL; CLODOALDO LEITES PINHEIRO, CPPSUL; Fernando Luiz Ferreira de Quadros, UFSM. |
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Título: |
Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Ciência Rural, v. 48, n. 6, e20170154, jun. 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Remnant areas of Pampas grassland have a distinct double structure. Efficiency of livestock farming on these grasslands depends on practices that are synchronized with natural variation. This study examined the changes in vegetation composition and forage mass during winter to understand the effects of grazing methods in a natural pasture with a double structure that was grazed by heifers. |
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Thesagro: |
Campo; Forragem; Pastejo; Recria. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/179379/1/1678-4596-cr-48-06-e20170154.pdf
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Marc: |
LEADER 01030naa a2200217 a 4500
001 2092997
005 2018-07-03
008 2018 bl uuuu u00u1 u #d
100 1 $aCOELHO, A. A.
245 $aVegetation composition and forage mass in grassland with a double structure under two winter grazing regimes.$h[electronic resource]
260 $c2018
520 $aRemnant areas of Pampas grassland have a distinct double structure. Efficiency of livestock farming on these grasslands depends on practices that are synchronized with natural variation. This study examined the changes in vegetation composition and forage mass during winter to understand the effects of grazing methods in a natural pasture with a double structure that was grazed by heifers.
650 $aCampo
650 $aForragem
650 $aPastejo
650 $aRecria
700 1 $aTRINDADE, J. P. P.
700 1 $aVOLK, L. B. da S.
700 1 $aPINHEIRO, C. L.
700 1 $aQUADROS, F. L. F. de
773 $tCiência Rural$gv. 48, n. 6, e20170154, jun. 2018.
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Registro original: |
Embrapa Pecuária Sul (CPPSUL) |
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