• Title/Summary/Keyword: Avena sativa L

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Characterization and Functional Properties of an Oat Gum Extracted from a Drought Harvested Oat (Avena sativa)

  • Ramos-Chavira, Naivi;Carvajal-Millan, Elizabeth;Rascon-Chu, Agustin;Marquez-Escalante, Jorge;Santana-Rodriguez, Victor;Salmeron-Zamora, Juan
    • Food Science and Biotechnology
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    • v.18 no.4
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    • pp.900-903
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    • 2009

  • An oat gum was extracted from whole seeds of a drought harvested oat (Avena sativa). Oat gum presented a ${\beta}-glucan$ content of 65%(w/w) and an intrinsic viscosity of 141 mL/g. Gelling capability of oat gum at different concentrations was investigated. Gel hardness increased from 0.08 to 0.25 N as the oat gum concentration changed from 5 to 10%(w/v). Whippability, foam stability, emulsion stability, and reduced viscosity of oat gum at different pH were also investigated. Oat gum whippability was maximum at pH 7 (146%), while the higher foam and emulsion stability values were found at pH 9 (88 and 96%, respectively). The gum reduced viscosity increased from 715 to 958 mL/g as the pH changed from 7 to 9. Oat gum shows great potential as a gel forming, thickening, and stabilizing agent.

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Binding of 59 Kilodalton Phytochrome from Avena sativa to Liposomes and Cibacron Blue Dye (귀리로 부터 얻은 59 KD phytochrome의 liposome과 Cibacron Blue Dye와의 결합성질)

  • Hahn, Tae-Ryong
    • Applied Biological Chemistry
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    • v.32 no.2
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    • pp.126-131
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    • 1989

  • Binding properties of the degraded 59kD phytochrome from etiolated Avena sativa seedlings to liposomes and Cibacron Blue dye were examined. In contrast with the native 124kD and partially degraded 118kD phytochromes, the farred light absorbing(Pfr) forms of the 59kD phytochrome binds to liposomes and Cibacron Blue dye via electrostatic interactions. Results indicate that the 59kD Pfr does not hold a hydrophobic surface which is exposed upon Pr to Pfr phototransformation of the 124 and 118kD phytochromes. Since a relatively extensive hydrophobic region is located in the chromophore bearing domain(59kD) of phytochrome(Hershey et al., Nuc. Acids Res., 13, 8543, 1986), the 55kD tryptic domain from the C-terminus plays an important role on the exposure of the hydrophobic area in the 118 and 124 Pfr to occur.

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Effects of Butachlor on the Cell Division and Protein Synthesis on Oat(Avena sativa L.) (Butachlor가 귀리의 세포분열(細胞分裂) 및 단백질(蛋白質) 합성(合成)에 미치는 영향(影響))

  • Kwon, S.W.;Kim, J.C.
    • Korean Journal of Weed Science
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    • v.9 no.3
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    • pp.245-249
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    • 1989

  • The effects of varying concentrations and durations of butachlor [N-(bytoxymety 1,)-2-chlor -2, 6-diethy lacetanilide treatment on oat(Avena sativa L.) root cell division and protein synthesis were studied. The highest concentration ($1{\times}10^{-3}M$) of butachlor caused the significant inhibition of cell division after 18hrs treatment. After 18hrs treatment, 59% and 82% inhibition of cell division occurred at $1{\times}10^{-4}M$ and $1{\times}10^{-3}M$, respectively, while 9% inhibition of cell division did at $1{\times}10^{-6}M$ concentration at the same exposure period. To investigate protein synthesis, the oats were treated for 18 and 24hrs with concentrations ranging from $1{\times}10^{-6}M$ to $1{\times}10^{-3}M$ butachlor. After 18hrs, butachlor treatment of oat with $1{\times}10^{-4}M$ inhibitited 23% protein synthesis, and butachlor treatment with $1{\times}10^{-4}M$ caused 34% inhibition after 24hrs. With SDS-PAGE of proteins extracted from oat root tips, butachlor usually inhibited the 16, 18, 30, 43 and 43.5 kD polypeptide, and proteins of root tips are made up of subunits below 100 kD polypeptide.

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