1,721,287 research outputs found
In vitro anticomplementary activity of phenylpropanoids from Agastache rugosa
No full textIn searching for anticomplementary compounds, three phenylpropanoids were isolated from the roots of Agastache rugosa and identified as rosmarinic acid (RA), rosmarinic acid methyl ester (RAM) and caffeic acid methyl ester (CAM) by NMR analyses. RA and RAM exhibited strong inhibitory activity on both the classical pathway (CP) and the alternative pathway (AP) of the complement system, in vitro, but CAM did far less than RA and RAM. RAM-MI~-M5, the methylated derivatives from the RAM, showed that the inhibitory activity was decreased in inverse proportion to the number of methylated groups and RAM-M 2~-M4, the isomers of two methylated hydroxyl groups, exhibited different inhibition activity.open
Rheological characteristics of hot-water extract concentrates from Agastache rugosa O. Kuntze
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Aroma pattern analysis of various extracts of agastache rugosa o. kuntze by electronic nose
No full textAroma of various extracts of Agastache rugosa O. Kuntze was analyzed by electronic nose with 32 conducting polymer sensor arrays. The 57 extracts were prepared by extraction solvents (hot water, ethanol and NaCl solution), extraction temperatures , solvent mixture ratios of solvent (10 times 35 times) and parts of Agastache rugosa O. Kuntze(flower, leaf and stem). Aroma pattern of Agastache rugosa O. Kuntze extracts showed big difference in normalized pattern and odor intensity with extraction temperatures and parts, but showed no difference with extraction solvents. Especially in the case of ethanol extracts, because odor of ethanol itself was very strong, difference in aroma of extracts with extraction temperatures and parts did not show through the electronic nose. The organoleptic characteristics such as mint odor, grassy odor, mint taste, medicinal herb taste and sweetness for Agastache rugosa O. Kuntze extracts were determined by the profile test and the result of sensory evaluation by quantitative descriptive analysis was explained to QDA diagram. In correlation with the result of aroma analysis by electronic nose and the sensory evaluation, difference in aroma pattern among the extracts concretely brought to light definite characteristics such as mint odor and mint taste.open
Benzothiadiazole enhances the elicitation of rosmarinic acid production in a suspension culture of Agastache rugosa O. Kuntze Hye
No full textCallus and suspension cultures were established from the leaves of Agastache rugosa. The suspension cell growth was maximum at 15 days after inoculation. The cellular content of rosmarinic acid increased slowly and reached maximum (0.42 mg g-1 dry wt) during the stationary phase of culture, after 18 days of inoculation. The addition of yeast extract preparation (MW < 10000) at 50 μg ml-1 elevated the rosmarinic acid content up to 5.7-fold of that found in non-elicited suspension cells. The elicitation of yeast extract preparation was further 2-fold enhanced by the presence of benzothiadiazole, a synthetic activator of plant systemic acquired resistance, as compared to yeast extract alone. These results showed that benzothiadiazole can be used as a tool for enhancing secondary metabolite accumulation in cell cultures.open
Preparative isolation and purification of deoxypodophyllotoxin from the rhizomes of Anthriscus sylvestris by high-speed counter-current chromatography
No full textA simple and rapid purification method of deoxypodophyllotoxin from the crude methanol extract of rhizomes of Anthriscus sylvestris was established using high-speed counter-current chromatography. From the crude extract (288.9 mg), deoxypodophyllotoxin (8.8 mg) was separated using a two-phase solvent system composed of n-hexane/ethyl acetate/methanol/water (7:3:5:5, v/v). The final purity of the deoxypodophyllotoxin was determined to be over 98% by ultra-performance liquid chromatography-UV analysis.open
Purification of a major protein with physiological activities from Panax ginseng C. A. Meyer
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in bone marrow-derived mast cells
No full textCinnamomum cambodianum has been used as a traditional medicine in Cambodia. Its effect on the bone marrow-derived mast cells (BMMCs) mediated allergic response remains unknown. In this study, a chloroform-soluble extract of C. cambodianum was evaluated for its effect on allergicmediators, including prostaglandin D2 (PGD2), leukotriene C4 (LTC4), β-hexosaminidase and cyclooxygenase-2 (COX-2) protein, in phorbol 12-myristate 13-acetate (PMA) plus calcimycin-stimulated BMMCs. The results revealed that the chloroform-soluble extractinhibited the production of interleukin-6, PGD2 and LTC4, and the expression of COX-2 in PMA plus calcimycin-stimulated BMMCs, implying a potential benefit of C. cambodianum in the treatment of allergy.open
Semialactone, isofouquierone peroxide and fouquierone, three new dammarane triterpenes from Rhus javanica
No full textThree new dammarane triterpenes and semialactic acid were isolated from the stem bark of Rhus javanica. The structures of these triterpenes, named semialactone, isofouquierone peroxide and fouquierone, were elucidated by 2D-NMR anaylsis (HMQC, 1H-1H COSY and HMBC), and the 13C-NMR data of semialatic acid is revised.open
Preparative isolation of 8-methoxypsoralen from the rhizomes of Pulsatilla chinensis using high-speed counter-current chromatography
No full textA simple and rapid purification method of 8-methoxy-psoralen from the crude methanol extract of the rhizomes of Pulsatilla chinenis was established using high-speed counter-current chromatography (HSCCC). From the crude extract (233.2 mg), 8-methoxypsoralen (10.0 mg) was separated for the first time in one-step, using a two-phase solvent system composed of n-hexane/ethyl acetate/methanol/water (5:5:5:5, v/v/v/v). The isolated amount of this compound was found to be equivalent to 89% of the amount observed quantitatively in the crude methanolic extract. The final purity of the 8-methoxy-psoralen was determined to be over 98% by ultra-performance liquid chromatography-UV analysis.open
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