• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.4
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• pp.501-505
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• 2003

In order to use as a new functional food material, chemical components of propolis and its extracts were surveyed. The contents of crude fat, nitrogen free extract, crude protein, ash and crude fiber in propolis were 86.41%, 7.32%, 2.71%, 1.05% and 0.20%, respectively. The mineral contents were in the order of Na (120.40 mg%), Ca (115.40 mg%), K (105.87 mg%) and Ca were higher in water extract than alcohol extract. Free sugars were composed of sucrose 152 mg%, glucose 114 mg% and fructose 6 mg%. The major amino acids of propolis were lysine 395.29 mg%, cystine 267.66 mg% and glutamic acid 248.14 mg%, respectively. Eight fatty acids in propolis were identified and the major fatty acids were oleic acid (51.89%), myristic acid (20.86%) and palmitic acid (20.28%). Myricetin, quercetin, apigenin and kaempferol were shown as major flavonols and total flavonol contents were higher in 50% ethanol extract than any other extracts. Major Polyphenol compounds in four kinds of extracts were gallic acid, chlorogenic acid, catechin, epigallocatechin gallate, epicatechin and epicatechin gallate.

• Korean Journal of Medicinal Crop Science
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• v.27 no.1
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• pp.24-29
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• 2019

Background: Camellia sinensis L.(CS) is a perennial evergreen species of plant whose leaves are used to produce tea. In this plant species, the parts used are the leaves, sub-branch parts are thrown out. Methods and Results: Ethanol extract of sub-branch parts was used for isolation of major compounds by column chromatography. Structures were identified as caffeine (1), (-)-epicatechin (2) and (-)-epicatechin gallate (3) by interpretation of spectroscopic analysis, including $^1H$- and $^{13}C$-NMR. High-performance liquid chromatography (HPLC) method was used to compare the quantitative level of marker compounds in various extraction solvents of sub-branch parts of CS. The content of caffeine, (-)-epicatechin, and (-)-epicatechin gallate in 30% ethanol extract showed higher value with $3.28{\pm}0.57mg/g$, $5.53{\pm}0.88mg/g$, and $1.29{\pm}0.24mg/g$, respectively. Conclusions: These results indicated that not only leaves parts but also sub-branch, could be a good source for the functional material and pharmaceutical industry.

• Korean Journal of Medicinal Crop Science
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• v.7 no.3
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• pp.193-199
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• 1999

This study was conducted to establish the standard of quality evaluation in Korean cultivated peony root(Paeoniae Radix). The diameter of fresh root and the concentrations of paeoniflorin, abliflorin and five phenolic compounds at different root ages in Euisung cultivar were investigated. The diameters of fresh root were 5.5mm, 10.3mm, 15.6mm and 19.1mm in one-year, two-year, three-year and four-year-old, respectively. It was also found that the diameter of fresh root was uniformly increased with the increase of root age. The concentrations of paeoniflorin, albiflorin, (+) -catechin and benzoic acid in one-year-old peony root(6.44%, 1.55%, 0.80% and 0.36%, respectively) were higher than those in three-(3.49%, 0.62%, 0.43% and 0.26%) or four-year-old(3.28%, 0.47%, 0.34% and 0.20%). The concentrations of gallic acid, (-) -epicatechin and (+) -taxiforin $3-O-{\beta}-D-glucoside$ were higher in three- (0.26%, 0.09% and 0.26%, respectively) or four-year-old (0.26%, 0.10% and 0.29%) than those in one-year-old (0.25 %, 0.08 % and 0.23 %) by contraries. Excepting (-) -epicatecin, the concentrations of paeoniflorin, albiflorin and four phenolic compounds in the root of unremoved cork layer were higher than those in the root of removed cork layer.

• Natural Product Sciences
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• v.21 no.2
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• pp.76-81
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• 2015

Diospyros burmanica Kurz. is an evergreen deciduous tree distributed in Mandalay of Myanmar, which belongs to the family of Ebenaceae. In Myanmar, it has been used to treat diarrhea, diabetes, diabetes and also as lumbers. In this study, seven flavonoids (1 - 7), a phenolic compound (8), and five triterpenes (9 - 13) were isolated from the barks of D. burmanica and their chemical structures were elucidated. Isolates were identified to be (+)-catechin (1), (+)-catechin 3-O-$\alpha$-L-rhamnopyranoside (2), (+)-catechin 3-O-gallate (3), (-)-epicatechin (4), (-)-epicatechin 3-O-gallate (5), (+)-afzelechin 3-O-$\alpha$-L-rhamnopyranoside (6), (+)-2,3-trans-dihydrokaempferol 3-O-$\alpha$-L-rhamnopyranoside (7), methyl gallate (8), lupeol (9), methyl lup-20(29)-en-3-on-28-oate (10), $\beta$-amyrin (11), $\alpha$-amyrin (12), $3\beta$-hydroxy-D:B-friedo-olean-5-ene (13) through MS, ¹H NMR and ¹³C NMR spectroscopic evidences.