• Korean Journal of Pharmacognosy
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• v.3 no.1
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• pp.27-29
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• 1972

Zizyphus jujuba, Z. jujuba var. inermis, and Z. jujuba for. hoonensis were cultured in korea. Zizyphus seeds are used for insomnia, sedation and sleeping-dropsy in many oriental medical prescriptions. Three Zizyphus species in Korea were investigated for their chemical composition. The components in methanol extracts of the fruit and seed were separated by TLC, PPC and were identified with known compounds. Sucrose, galactose, glucose, fructose and ${\beta}-sitosterol$ were isolated from the fruit of Zizyphus jujuba for. hoonensis.

• Natural Product Sciences
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• v.23 no.4
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• pp.258-264
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• 2017

This study analyzed the seeds of Zizyphus jujuba var. inermis commonly used as a remedy in traditional Chinese medicine, in order to determine its various biologically active compounds. Through process 3-pentadecylcatechol, ${\rho}$-menth-8-ene, and ${\gamma}$-bisabolene were isolated and identified for the first time which are urushiol, monoterpenoidal, and sesquiterpenoidal compounds, respectively. Also, found were another sesquiterpenoidal compounds, vomifoliol, and four steroidal compounds, ${\beta}$-sitosterol, stigmasterol, stigmasta-5,23-dien-$3{\beta}$-ol, and stigmast-4-en-3-one. In addition, fourteen triterpenoidal compounds were isolated and identified. These were lupeol, betulinic acid, betulinaldehyde, alphitolic acid, 3-O-cis-${\rho}$-coumaroyl-alphitolic acid, 3-O-trans-${\rho}$-coumaroyl-alphitolic acid, 2-O-cis-${\rho}$-coumaroyl-alphitolic acid, 2-O-trans-${\rho}$-coumaroyl-alphitolic acid, zizyberanalic acid, ceanothic acid, oleanolic acid, maslinic acid, 3-O-cis-${\rho}$-coumaroyl-maslinic acid, and 3-O-trans-${\rho}$-coumaroyl-maslinic acid. The structures were identified by comparing of the spectroscopic experiments, NMR and MS, and then compared that reported data, respectively. Three extracts of water, methanol, and chloroform from the seeds showed a weak anti-proliferative effect, anti-microbial activity, and anti-oxidant effect, respectively.

• Korean Journal of Plant Resources
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• v.20 no.2
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• pp.177-184
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• 2007

Bioactive substances, antioxidant activities and tyrosinase inhibitory activities of seed extracts were evaluated to discover new functional materials, using 13 edible or medicinal plants. Total polyphenol and flavonoid contents were highest in Taxus cuspidata, with $57.51mg{\cdot}g^{-1}\;and\;7.98mg{\cdot}g^{-1}$, respectively. Seed extract of Vitis coignetiae${\times}$Vitis labruscana($RC_{30}=0.030mg{\cdot}ml^{-1}$) was found to be the most effective in DPPH radical scavenging test, and the highest ABTS radical scavenging activity was shown in Diospyros lotus($RC_{30}=0.044mg{\cdot}ml^{-1}$). Inhibitory effects on peroxidation of linoleic acid determined by ferric thiocyanate (FTC) method were similar to BHT in Diospyros kaki, Diospyros lotus, Magnolia officinalis, Styrax obassia, Vitis coignetiae, Vitis coignetiae${\times}$Vistis labruscana, Zizyphus jujuba, Zizyphus jujuba var. inermis. For the inhibition against mushroom tyrosinase, Diospyros kaki, Diospyros lotus, Poncirus tritoliata, Prunus serrulata var. spomtanea, Zizyphus jujuba and Zizyphus jujuba var. inermis exhibited inhibitory activity, and especially Diospyros lotus showed the strongest inhibition.

• Korean Journal of Food Science and Technology
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• v.38 no.1
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• pp.128-134
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• 2006

Antioxidant activities of methanol extracts from sarcocarp and seed of Zizyphus jujuba var. inermis Rehder were investigated in vitro. Contents of total polyphenols in methanol extracts from sarcocarp and seed were 98.83, $138.99\;{\mu}g/mg$, respectively. Radical-scavenging activities of methanol extracts were examined using ${\alpha},{\alpha}-diphenyl-{\beta}-picrylhydrazyl$ and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radicals, and hydrogen peroxide assay. Inhibition effects of methanol extracts on peroxidation of linoleic acid were examined by ferric thiocyanate and thiobarbituric acid methods. Both sarcocarp and seed of Zizyphus jujuba var. inermis Rehder showed relatively high antioxidant activities in various systems.