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1.
China Journal of Chinese Materia Medica ; (24): 1553-1557, 2023.
Artigo em Chinês | WPRIM | ID: wpr-970627

RESUMO

Two prenylated 2-arylbenzofurans were isolated from roots of Artocarpus heterophyllus, with a combination of various chromatographic approaches, including ODS, MCI, Sephadex LH-20, and semipreparative high performance liquid chromatography(HPLC). They were identified as 5-[6-hydroxy-4-methoxy-5,7-bis(3-methylbut-2-enyl)benzofuran-2-yl]-1,3-benzenediol(1) and 5-[2H,9H-2,2,9,9-tetramethyl-furo[2,3-f]pyrano[2,3-h][1]benzopyran-6-yl]-1,3-benzenediol(2) with spectroscopic methods, such as HR-ESI-MS, IR, 1D NMR, and 2D NMR, and named artoheterins B(1) and C(2), respectively. The anti-respiratory burst activities of the two compounds were evaluated with rat polymorphonuclear neutrophils(PMNs) stimulated by phorbol 12-myristate 13-acetate(PMA). The results showed that 1 and 2 exhibited significant inhibitory effect on respiratory burst of PMNs with IC_(50) values of 0.27 and 1.53 μmol·L~(-1), respectively.


Assuntos
Ratos , Animais , Estrutura Molecular , Artocarpus/química , Extratos Vegetais/farmacologia , Espectroscopia de Ressonância Magnética , Raízes de Plantas/química
2.
Arch. latinoam. nutr ; 57(3): 287-294, sept. 2007. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-481886

RESUMO

El almidón extraído de las semillas del fruto de pan (Artocarpus altilis) fue modificado químicamente por acetilación y oxidación, y sus propiedades funcionales evaluadas y comparadas con las del almidón nativo. El análisis proximal reveló que los almidones modificados presentaron contenidos de humedad más altos que el nativo. El contenido de cenizas, proteínas, fibra cruda, y amilosa aparente fue reducido con las modificaciones. Las modificaciones no alteraron la morfología de los gránulos de almidón nativo de A. altilis, presentando forma irregular, en su mayoría ovalados y con superficie lisa. La absorción de agua, poder de hinchamiento y sólidos solubles variaron con las modificaciones químicas realizadas, resultando mayores en el almidón acetilado. En comparación con el almidón nativo, los dos tipos de modificación redujeron la temperatura inicial de gelatinización; el pico de máxima viscosidad se redujo en el almidón oxidado pero aumentó en el acetilado; la viscosidad de la pasta en caliente disminuyó para los almidones modificados, mientras que la viscosidad en frío fue menor en el almidón oxidado y mayor en el almidón acetilado. La estabilidad se incrementó con la acetilación y se redujo con la oxidación. El almidón acetilado presentó el valor más bajo de setback o asentamiento, por lo que hubo una menor tendencia a la retrogradación.


Effect of acetylation and oxidation on some properties of Breadfruit (Artocarpus altilis) seed starch. Starch extracted from seeds of Artocarpus altilis (Breadfruit) was chemically modified by acetylation and oxidation, and its functional properties were evaluated and compared with these of native starch. Analysis of the chemical composition showed that moisture content was higher for modified starches. Ash, protein, crude fiber and amylose contents were reduced by the modifications, but did not alter the native starch granules’ irregularity, oval shape and smooth surface. Acetylation produced changes in water absorption, swelling power and soluble solids, these values were higher for acetylated starch, while values for native and oxidized starches were similar. Both modifications reduced pasting temperature; oxidation reduced maximum peak viscosity but it was increased by acetylation. Hot paste viscosity was reduced by both modifications, whereas cold paste viscosity was lower in the oxidized starch and higher in the acetylated starch. Breakdown was increased by acetylation and reduced with oxidation. Setback value was reduced after acetylation, indicating it could minimize retrogradation of the starch.


Assuntos
Artocarpus/química , Sementes/química , Amido/análise , Acetilação , Artocarpus/ultraestrutura , Físico-Química , Microscopia Eletrônica de Varredura , Oxirredução , Reologia , Sementes/ultraestrutura , Amido/síntese química , Amido/ultraestrutura
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