• Korean Journal of Food Science and Technology
• /
• v.47 no.2
• /
• pp.158-163
• /
• 2015

Fustin comprised >98 and 73.0-86.7% of the total flavonoid content in the bark, and the stems and lignum of Rhus verniciflua, respectively. The butein, fisetin, and sulfuretin content varied between 0.31-2.17, 0.27-3.32, and 0.15-0.80 mg/g on a dry weight basis, respectively, in different parts of Rhus verniciflua. The urushiol content was 5.09-6.29, 55.05-56.30, and 0.38-0.39 mg/100 g on a dry weight basis in the stems, bark, and lignum, respectively. This showed that the bark of the tree had the highest urushiol content. C15:3 (pentadecatrienyl catechol), C15:1 (pentadecenyl catechol), and C15:2 (pentadecadienyl catechol) comprised 63, 33-35, and 2-3% of urushiol congeners in the tree bark, respectively.

• Journal of Life Science
• /
• v.12 no.3
• /
• pp.332-339
• /
• 2002

The pathogenesis of cholestatic liver injury as well as the modulation of hepatic fibrogenesis is causally associated with involvement of reactive oxygen species and free radical reactions. In this study, we investigated whether flavonoids (fustin, sulfuretin) which were isolated from Rhus verniciflua Stokes (RCS) have antioxidant and antihepatotoxicity effect under the biliary liver fibrosis condition. After surgery (control) and posttreated RCS methanol extract (250mg/kg), ethyl acetate extract (250mg/kg) and flavonoids were administered p.o. 10mg/kg/day in two weeks for control groups. The concentration of clinical parameters and product of hepatic lipid peroxidation and the hydroxyproline content were significantly increased in liver fibrosis developed rats. Among the clinical parameters of serum, value of ALT, AST, SDH, total bilirubin and ${\gamma}$ -GT in posttreated RCS components-group showed significantly lower than in control-group. The content of hydroxyproline in posttreated RCS components-group showed lower than in control group and then the value of MDA in posttreated RCS components-group was also significantly reduced to 40~60% of that in control group. The hepatic xanthine oxidase and aldehyde oxidate activities were posttreated RCS components-group showed significantly lower than in control-group. The hepatic SOD and glutathione peroxidase activities were posttreated RCS components-group showed significantly higher than in control-group. Hence we concluded that active components of fustin and sulfuretin which were isolated from R. verniciflua Stokes were hepatoprotective effect in experimental liver fibrosis.

• Korean Journal of Medicinal Crop Science
• /
• v.12 no.1
• /
• pp.60-66
• /
• 2004

This study was carried out to confirm the phylogenetic relationships in Korean Rhus species. Sequences from internal transcribed spacers (ITS) of nuclear ribosomal DNA and rbcL gene of chloroplast DNA were determined. Cotinus coggygria was selected as outgroup because it is closest allied with Rhus in Anacardiaceae. Also, ingroup was limited as six Korean Rhus species. ITS 1 sequences in six species of Rhus and one species of Cotinus ranged from 246 to 253 bp and ITS 2 sequences from 234 to 244 bp. Concerning the G+C content of the studied taxa, ITS 1 sequences ranged from 58.0 to 68.13% and ITS 2 from 59.75 to 68.46%. On the other hand, rbcL sequences were same size in the all species examined by 1,428 bp. G+C contents of rbcL sequences were ranged from 43.56 to 43.77% which means there are nearly no different from interspecies each other. Phylogenetic tree strongly supports the colse relationships between R. succedanea and R. sylvestris. Rhus javanica and Cotinus coggygria were also closely allied with each other in ITS and rbcL trees. Therefore, R. javanica was regarded as most primitive species among the Korean Rhus species. ITS 1 region of nuclear ribosomal DNA was suggested as very useful taxonomical marker for genus Rhus.

• Korean Journal of Plant Resources
• /
• v.11 no.2
• /
• pp.202-209
• /
• 1998

Through total fatty acid analysis by the Gas chromatography, 17 different fatty acids were identified from the sap extracted from bark of Korean Rhus(Anacardiaceae), six species. Linoleic acid(C18 :2) and oleic acid(C18 : 1) were identified as major fatty acids for the species investigated, but except in R. chinensis.In the fatty acid composition for the species, one or two specific-fatty acid was detected, and its could be utilized as a useful taxonomic character.The result of cluster analysis by the 22 reliable characters in the fatty acid composition suggested first group was R.trichocarpa and R. succedanea, the second group, R.verniciflua, R.ambgua and R. sylvestris, but R.chinensis was a greatly independent species. The possible chemotaxonomic application of the fatty acid composition of bark in the genus Rhus was discussed.

• Korean Journal of Plant Resources
• /
• v.18 no.2
• /
• pp.337-342
• /
• 2005

This study was conducted to investigate the bark production from a top branch(Woojuk) of lacquer tree(Rhus verniciflua) that collected Rhus lacquer in summer, analyzing a relationship between several factors - diameter, tree weight, weight of Woojuk and bark. The weight of Woojuk averaged was made up $48\%$ of the tree on average. As the weight of the tree increased, however, the Woojuk showed the rising trend. It was turned out that the tree size for making 1kg of dry bark must be at least DBB 8cm. The result on Woojuk's bark was that $43.3\%$ of total trees produced a green bark of 1.1kg to 1.5kg, and most of them put out 1.5kg and less. Also the rate of trees to make 0.6kg to 1.0kg of dry bark was highest in $50.8\%$, but its production in most trees was 1.0kg and below. As the moisture content of a green bark averaged $39\%$, it is estimated that the production of 1kg in dry bark requires at least 6kg of top branch in lacquer tree.

• YAKHAK HOEJI
• /
• v.49 no.6
• /
• pp.471-476
• /
• 2005

Rhus verniciflua Stokes (RVS) has been used as a food supplement and a traditional herbal medicine for a men's sexual enhancement. In this study, we prepared a flavonoid fraction (RWE) from a hot water extract of RVS and its influence on sexual behavior was studied in male rats which were orally administered varying doses of RWE for 2 weeks. All doses of RWE stimulated sexual behavior in male rats such as reducing mounting latency and enhancing mount frequencies. However, intermission numbers were not changed and none of group can observe the ejaculation during behavioral testing time 5 min. Testosterone levels were Increased about 0$\∼$53$\%$ and 92$\∼$164$\%$ by the treatment of RWE for 1 and 2 weeks, respectively. However, estrogen levels in male rats tended to decrease in a dose dependent manner of RWE. At the dose of RWE 200 mg/kg, estrogen level was reduced to 77.5$\%$ and 70.3$\%$ of control after 1 and 2 weeks treatment. These findings suggest that the Rhus flavonoid fraction can stimulate the androgen-dependent male sexual behavior and it can be applied to the material of functional food for enhancing the sexual function.

• 한국약용작물학회:학술대회논문집
• /
• 2011.04a
• /
• pp.108-109
• /
• 2011

• Proceedings of the PSK Conference
• /
• 2000.04a
• /
• pp.114.1-114.1
• /
• 2000

• Proceedings of the PSK Conference
• /
• 2000.04a
• /
• pp.188.2-189
• /
• 2000

• Proceedings of the PSK Conference
• /
• 2001.10a
• /
• pp.274.1-274.1
• /
• 2001