• Korean Journal of Food Science and Technology
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• v.24 no.6
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• pp.547-551
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• 1992

The antioxidative effects of Rhus javanica $Linn{\acute{e}}$ ethanol extract (RE) with or without some synergists were determined by measurement of POV and TBA of oil in ramyun and potato flake fried in palm oil or lard. RE with ascorbic acid and with tocopherol significantly increased the oxidative stability of ramyun. The results obtained from sensory evaluation were similar to those of POV and TBA values. RE with phosphoric acid and with ascorbic acid retarded the oxidation of potato flakes fried in palm oil or lard during storage.

• Korean journal of applied entomology
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• v.36 no.1
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• pp.83-87
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• 1997

These studies were conducted to carry out mechanism and site of gall formation by Schlectendalia chinensis in Rhus javanica. The formation period of gall hy occurrence of fundatrix was middle of June, and fundatrix was settled and parasited on back side of immature leaves and tissues of Rhus javanica was ride to fore face, then formed Schlectendalia chinensis gall. Scl~lectendalia chinensis was suddenly developed in middle of Auguest. As the density of Schlectertdalia chinensb increases, the Schlectendalia chinensir gall was more plumped. The part of phyllotaxy of Schlectendalia chinensis gall in leaf and pinnate of was increased in closer pan of terminal leaflet and leaflet was more occupied then wing.

• Korean Journal of Food Science and Technology
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• v.24 no.4
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• pp.320-325
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• 1992

For natural antioxidant test, the Rhus javanica $Linn\'{e}$ was extracted by 75% ethyl alcohol and fractionated it by chloroform and ethyl acetate using separatory funnel and column chromatography. In the Rhus javanica L. extract, the effective material was disolved easily in ethyl acetate and chloroform. When 600 ppm of ethyl acetate fraction of the extract was added to palm oil and lard, AI(antioxidant index) of each oil was 1.60 and 3.90 respectively. The $CHCl_3$ and EtOAc fractions were more effective than whole extract of Rhus javanica L. The palm oil, lard and soybean oil containing different levels of the Rhus javanica L. extract were stored at $60^{\circ}C$ to compare their antioxidative activity. Peroxide value, acid value and TBA value of each oil were monitored. The Rhus javanica L. extract was very effective to retard oxidation of palm oil and lard. This result coincided with Ranimat test.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.74-74
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• 2022

본 연구는 붉나무의 기능성 성분의 산업화 활용을 위한 고품질의 붉나무 1년생 용기묘 대량생산을 위해 실시되었다. 붉나무 1년생 용기묘의 묘목품질의 향상을 위해 다양한 농도의 시비처리하여 우량묘 생산에 적합한 시비수준을 구명하고자 하였다. 시비실험은 무시비구 포함하여 수용성 복합비료 (N:P:K=20:20:20, v/v)를 1,000mg·L^-1, 2,000mg·L^-1, 3,000mg·L^-1 수준으로 실시하였다. 시비처리는 붉나무 용기묘의 간장과 근원경 생장은 1,000mg·L^-1 시비처리구에서 생장이 가장 좋게 나타났으며 시비수준이 증가할수록 감소하는 경향을 보였다. 뿌리형태 특성분석에서도 전체뿌리길이, 투영단면적, 표면적 및 뿌리부피가 간장과 근원경 생장과 동일한 경향을 보이는 것으로 조사되었다. 건물 생산량은 부위별 잎, 줄기, 뿌리 및 전체가 모두 1,000mg·L^-1 시비처리구에서 가장 높았으며, 그 이상의 시비수준에서는 점점 감소하는 경향을 보였다. H/D(Hight/Root collar diameter)율은 전체가 3.82(무시비구) ~ 4.90, T/R(Top/Root)율은 전체가 0.56(1,000mg·L^-1 시비처리구) ~ 0.82로 조사되었다. 시비처리 에 의한 붉나무의 LWR(Leaf dry weight ratio)은 무시비구, SWR(Shoot dry weight ratio)은 3,000mg·L^-1 시비처리구, 그리고 RWR(Root dry weight ratio)은 1,000mg·L^-1 시비처리구에서 유의적 차이를 보이며 높게 나타났다. 묘목품질지수(QI)의 경우 1,000mg·L^-1 시비처리구에서 12.13으로 다른 시비수준들보다 월등히 높았다. 본 실험의 결과를 종합하면, 뿌리발달이 좋은 우량한 붉나무 생산에 적절한 시비수준은 1,000mg·L^-1 정도인 것으로 판단된다.

• The Korea Beekeeping Bulletin
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• s.323
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• pp.38-39
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• 2007

• Journal of the Korean Applied Science and Technology
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• v.37 no.1
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• pp.145-152
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• 2020

In this study, the antimicrobial activity was tested by Ethanol extract(ET), Ethyl acetate fraction(EA) and Butanol fraction(BT) of Rhus javanica L fruit as natural preservatives. The antimicrobial activity were tested by Paper disc method and minimum inhibitory concentration (MIC) for microorganisms (Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, Candida Albicans). As a result of the antimicrobial activities of P. aeruginosa fruit extracts have shown the clear zone that S. aureus, S. epidermidis, E. coli, and P. aeruginosa. In BT, additional clear zones were observed for the Candida. The MIC results showed that EA samples showed the lowest concentrations for S. aureus S. epidermidis, E. coli, and P. aeruginosa. Accordingly, it can be concluded that these Rhus javanica L fruit extracts have the potential for antimicrobial materials for the cosmetic industry.

• Journal of Applied Biological Chemistry
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• v.62 no.2
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• pp.195-202
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• 2019

Rhus javanica L. is Anacardiaceae plant distributed in East Asia. We evaluated the antioxidant activity and antiinflammatory effect of leaf, branch, root of ethyl acetate fraction from R. javanica. To confirm effective each extraction, The antioxidant activity was evaluated using 1,1-Diphenyl-2-picryl-hydrazyl and 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) scavenging activity assays, and the anti-inflammatory activity was evaluated based on inhibitory activities on the protein and mRNA expression of iNOS and COX-2 in LPS-induced RAW264.7 cells. The phenolic compounds content of each extract was analyzed with Folin reagents and HPLC/PDA method. The gallic acids were identified and quantified. The roots of R. javanica showed strong antioxidant activity. Its total phenolic compounds content were higher than the orders. In addition, anti-inflammatory activity inhibited the protein and mRNA expression of nitric oxide production factor, following the same pattern as contents of phenolic compounds included gallic acid and its antioxidant activity. In conclusion, R. javanica showed effective antioxidant and anti-inflammatory activity. Especially, the roots were evaluated to be highly valuable as a natural resource for reducing inflammation.

• Korean Journal of Medicinal Crop Science
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• v.8 no.4
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• pp.304-311
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• 2000

This study was conducted to investigate the ratio and number of the Rhus javanica gall formed by chinese sumac aphid, Scheleechtendalia chinensis, in several different conditions in which R. javanica lives. The density of 11 to 15-year-old R. javanica was more higher and the number of galls was also higher than 1 to 5- or over 16-year-old one at these sites. The formed gall according to four directions such as the East, West, South and North was founded the highest at the East and followed South, North, and West order. The formative rate of R. javanica gall did not differ in the mixture forest, and in the habitat having a heap of a little stone and mosses near a valley was better than in the site of road perimeter. Through an index of the gall diameter and the number of chinese sumac aphid, we evaluated the gall processing and development formed by the aphid. As the density of aphids increase, the size of the gall was also more plumped. The part of phyllotaxy of R. javanica gall in leaf and pinnate of was increased in the middle and upper part of terminal leaflet and leaflet was more occupied than wing. R. javanica which did not form a gall in natural environmental, formed gall by a artificial inoculation of S. chinensis. Some gall disappeared during a gall development from various environmental conditions.

• Korean Journal of Food Science and Technology
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• v.24 no.2
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• pp.149-153
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• 1992

Antioxidative effects of crude ethanol extract of the Rhus javanica L. and its fractionates with various synergists on the oxidation of palm oil, lard and soybean oil were compared with induction period(IP) using a Rancimat test. Addition of 200 ppm of the crude extract with phosphoric acid to palm oil extended IP 2.89 times as much as that of control and ethyl acetate fractionate extended IP 4.18 times at the same condition. To lard, 600 ppm of chloroform fraction with 200 ppm of ${\delta}-Tocopherol$ extended IP 13.42 times as much as that of control. 200 ppm of each fraction with various synergists were added to palm oil and lard, and oxidative stability of the oils were monitored by measuring POV, AV, and TBA value. The POV of palm oil containing 200 ppm of ethyl acetate and chloroform fraction with 200 ppm of phosphoric acid after 27 days storage at $60^{\circ}C$ were 8.9 meq/kg and 9.4 meq/kg respectively while the POV of control was 98.3 meq/kg at the same condition. AV and TBA value were also lower than that of control. The POV value of lard containing same amount of ethyl acetate and chloroform fraction with ${\delta}-Tocopherol$ after 12 day storage at $60^{\circ}C$ were 20.0meq/kg and 10.7 meq/kg respectively while the POV of control was 161.1 meq/kg at the same condition. AV and TBA value were also lower than that of control.

• Korean Journal of Food Science and Technology
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• v.35 no.4
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• pp.726-732
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• 2003

The crude extracts from Rhus javanica Linne showed comparatively strong antioxidative activity in test oils. Antioxidative components were isolated and identified by column chromatography, thin layer chromatography, UV, and NMR. These antioxidative components were added to several oils to compare antioxidative activity with several commercial antioxidants, such as BHA, BHT, and tocopherol. After the sixth column chromatography, one fraction (R-18-9-3-2-4-2) was separated from chloroform layer of Rhus javanica Linne. The R-18-9-3-2-4-2 fraction was identified as methyl gallate by $^1H-NMR$ and $^{13}C-NMR$ and confirmed with methyl gallate standard as authentic. The R18-9-3-2-4-2 fraction from chloroform layer of Rhus javanica Linne showed stronger activity than that of the ${\alpha}-,\;{\delta}-tocopherol$, BHT, and BHA at the same concentration.