• Korean Journal of Pharmacognosy
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• v.30 no.1
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• pp.87-91
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• 1999

Two carotenoids and four flavonoids were isolated from the whole plant of Artemisia sylvatica Max. Their structures were identified as ${\beta}-carotene$, lutein, luteolin, rutin, $pectolinarigenin-7-O-{\beta}-glucopyranoside$ and luteolin-7-O-neohesperidoside on the basis of spectroscopic means.

• Journal of the Korean Society of Costume
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• v.52 no.3
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• pp.19-27
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• 2002

This paper surveys the mordanting and dyeing properties of Sophora japonica L. Appropriate extraction, dyeing and mordanting condition of Sophora japonica L. were determined, and the effect of mordanting method on dye uptake and color fastness of dyed fabric was investigated. The maximum absorbance of Sophora japonica L. solution was 367.6mn, rutin solution was 365.6mn. The color of Sophora japonica L. solution was affected at pH 2 and pH 8~9. The optimum temperature to extract Sophora japonica L. was during 1 hour in 8$0^{\circ}C$. The effective dyeing temperature and time of silk were 10$0^{\circ}C$, 60min. K/S value of dyeing fabrics was increased by pre-mordanting treatment, especially Fe, Sn, Cr. In the case of Sophora japonica L. light fastness was increased by Fe mordanting. Perspiration fastness was better in acidic solution than that in alkaline solution. Fastness to rubbing and dry-cleaning were good in general.

• Korean Journal of Pharmacognosy
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• v.30 no.3
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• pp.301-305
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• 1999

Eight compounds were isolated from the BuOH extract of the stem of Clematis trichotoma (Ranunculaceae). On the basis of spectroscopic evidences, the structures of these compounds were established as rutin, kaempferol 3-O-neohesperidoside, adenosine, adenin, hirustrin, caffeic acid $4-{\beta}-glucoside$, 3-methoxyarbutin and uridine.

• Korean Journal of Pharmacognosy
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• v.29 no.3
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• pp.225-230
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• 1998

Cornus controversa $H_{EMSL}$. (Cornaceae) is distributed widely in Korea and has been used for the treatment of diarrhea and a tonic medicine. Six compounds were isolated from the MeOH extract of the dried stem bark of Cornus controversa. Their structures were identified as gallic acid(1), scopoletin(2), arjunglucoside II(3), isoquercitrin(4), quercitrin(5) and rutin(6) by comparisons of the physicochemical and spectroscopic evidences. Among these compounds, scopoletin and arjunglucoside II were the first time isolation from this plant.

• Korean Journal of Pharmacognosy
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• v.29 no.3
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• pp.217-224
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• 1998

Eight compounds were isolated from the stem bark of Cornus walteri. On the basis of chemical and spectroscopic evidences, the structures of these compounds were identified as gallic acid, (+)-gallocatechin, (+)-catechin, quercetin, quercitrin, rutin, isoquercitrin and hyperoside respectively.

• Journal of Applied Biological Chemistry
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• v.63 no.3
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• pp.197-201
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• 2020

In order to enhance the extraction efficiency of flavonoid from Saururus chinensis, carbohydrate-hydrolyzing enzyme Viscozyme L aided extraction techniques have been studied. Then flavonoid composition, as well as quercetin, were also identified using UV/Vis, HPLC/MS, and ¹H-NMR. The results showed that favorable extraction conditions were Viscozyme L concentration of 0.25 mg/g, pH 4.2, reaction at 45 ℃ for 12 h. Under the favorable extraction condition, total flavonoid yield (37.9 mg/g) and quercetin yield (0.86 mg/g) increased by about 2.0 and 9.6 times, respectively, compared to control group. Interestingly, as a significant flavonoid of S. chinensis, flavonoid glycones rutin was hydrolyzed to aglycones quercetin by Viscozyme L. These findings provide scientific and theoretical support for the development quercetin-rich products, which was quickly absorbed by the human body than rutin.

• YAKHAK HOEJI
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• v.36 no.5
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• pp.407-411
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• 1992

As part of our search for less toxic antimicrobial substances from natural resources, naringin was isolated from feels of Citri fructus and then hydrolyzed to naringenin. The antimicrobial activity of naringenin was examined by measuring the minimal inhibitory concentration(MIC) against fourteen species of bacteria. The antimicrobial activity of narngenin in combination with rutin or hesperetin was evaluated by checkerboard method. Among fourteen species tested, the antimicrobial activity of naringenin was the most prominant against Staphylococcus aureus and Shigella boydii showing MIC of $100\;{\mu}g/ml$ for both species. Combinations of naringenin with rutin or hesperetin showed synergism against several species of bacteria, but no antagonism was observed.

• YAKHAK HOEJI
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• v.35 no.3
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• pp.165-173
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• 1991

Effects of eight flavonoids and their related compounds on leukocytes migration, superoxide anion production and lipid peroxidation in the phagocytosis of latex beads or E. coli by guinea pig peritoneal exudate cells were studied in vitro. It shows that most of flavonoids generally inhibited the leukocytes migration and production of superoxide anion and malonedialdehydes. Their inhibitory activities in the phagocytosis of latex beads had more active than that of E. coli. Quercetin has the most inhibitory activity in leukocytes migration and production of superoxide anion and lipid peroxides at the concentration of 1, 2 and 10 $\mu{M}$. Catechin and rutin at the concentration of 2 and 10 $\mu{M}$ inhibited significantly the production of superoxide anion and lipid peroxides. Flavone, catechin, naringin and rutin at the concentration of 2 and 10 $\mu{M}$ inhibited significantly the leukocytes migration.

• Natural Product Sciences
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• v.8 no.4
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• pp.147-151
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• 2002

In the course of our work on anti-platelet constituents from plants, eight phenolic compounds, $({\pm})-syringaresinol$ (1), 4-hydroxybenzaldehyde (2), 4-hydroxybenzoic acid (3), vanillic acid (4), 4-hydroxy cinnamic acid (5), quercetin 3-O-rhamnoside (6), rutin (7), and quercetin $3-(2^G-rhamnosylrutinoside)$ (8) were isolated from the methanol extract of the leaves of Magnolia obovata. The compounds were identified based on the spectroscopic data. Compound 2, 3, 5, 6, 7 and 8 were isolated for the first time from genus Magnolia. 1 and 6 showed same order of inhibitory potencies as acetylsalicylic acid (ASA) to rat platelet aggregation induced by all the stimulators tested. The remaining six compounds showed only mild effects.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2000.10b
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• pp.30-31
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• 2000