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Phytochemical Constituents from Salvia plebeia
Ah-Reum Han,Chao Hui Duan,Jung Noh Lee,Kwang Sik Lee,홍진태,Kun Kook Lee 한국생약학회 2010 Natural Product Sciences Vol.16 No.4
Phytochemical investigation of Salvia plebeia resulted in the isolation of nine compounds. Their structures were determined to be 6-methoxynaringenin (1), 6-methoxynaringenin-7-O-b-D-glucoside (2), hispidulin (3), homoplantaginin (4), nepetin (5), nepitrin (6), 6-hydroxyluteolin (7), caffeic acid (8) and rosmarinic acid (9) by spectroscopic analyses. 6-Methoxynaringenin (1), 6-hydroxyluteolin (7) and rosmarinic acid (9) were isolated from this plant for the first time.
A New Cytotoxic Phenylbutenoid Dimer from the Rhizomes of Zingiber cassumunar
Han, Ah-Reum et al 이화여자대학교 2004 藥學硏究論文集 Vol.- No.14
A new phenylbutenoid dimer, (±)-trans-3-(4-hydroxy-3-meth-oxyphenyl)4-[(E)-3,4-dimethoxystyryl]cyclohex-1-ene, was isolated from the rhizomes of Zingiber cassumunar along with the three known compounds, (±)-trans-3-)3,4-dimethoxyphenyl)-4-[(E)-3,4-dimethoxystyryl]cyclohex-1-ene, 4-(3,4-dimethoxyphenyl)but-1,3-diene, and 4-(2,4,5-trimethoxyphenyl)but-1,3-diene by bioassay-directed fractionation using the A549 human cancer cell line cytotoxicity assay. Structure of the new compound was elucidated by spectral analysis, including 1D and 2D NMR experiments.
A New Flavanone Glycoside from the Dried Immature Fruits of Poncirus trifoliata
HAN, Ah-Reum,KIM, Jong-Bin,LEE, Jun,NAM, Joo-Won,LEE, Ik-Soo,SHIM, Chang-Koo,LEE, Kyung-Tae,SEO, Eun-Kyoung 이화여자대학교 약학연구소 2008 藥學硏究論文集 Vol.- No.18
A new flavanone glycoside, (2R)-5-hydroxy-4'-methoxyflavanone-7-0-{β-glucopyranosyl-(1->2)-β-glucopyranoside} (1), was isolated from the EtOAc extract of dried immature fruit of Poncirus trifoliata, together with three known compounds, (2S)-poncirin (2), (2S)-naringin (3), and (2S)-poncirenin (4). The structure of compound 1 was elucidated by spectroscopic data analysis, including 1D and 2D NMR experiments. Among the isolates, compound 2 exhibited considerable inhibitory activity against lipopolysaccharide (LPS)-induced prostaglandin E₂ (PGE₂) and interleukin-6 (IL-6) production, and mRNA expression in RAW 264.7 murine macrophage cells.
Two New Phenolic Compounds from the Rhizomes of <i>Gastrodia elata</i> <small>Blume</small>
Han, Ah‐,Reum,Ji ,Shin, Hyun,Rim ,Jeon, Ha,Lee, Je‐,Hyun,Lee, Dongho,Seo, Eun‐,Kyoung WILEY‐VCH Verlag 2011 Helvetica chimica acta Vol.94 No.7
<P><B>Abstract</B></P><P>Phytochemical investigation of the rhizomes of <I>Gastrodia elata</I> <SMALL>Blume</SMALL> (Orchidaceae) led to the isolation and identification of twelve compounds, including two new phenolic compounds, 4‐hydroxybenzyl vanillyl ether (=4‐{[(4‐hydroxyphenyl)methoxy]methyl}‐2‐methoxyphenol; <B>1</B>) and 4‐{{4‐[4‐(methoxymethyl)phenoxy]benzyl}oxy}benzyl methyl ether (=1‐[4‐(methoxymethyl)phenoxy]‐4‐{[4‐(methoxymethyl)phenoxy]methyl}benzene; <B>2</B>). The structures of <B>1</B> and <B>2</B> were elucidated by spectroscopic data analysis including 1D‐ and 2D‐NMR experiments.</P>
Han, Ah-Reum,Min, Hye-Young,Nam, Joo-Won,Lee, Na-Youn,Wiryawan, Adam,Suprapto, Wahyu,Lee, Sang Kook,Lee, Kang Ro,Seo, Eun-Kyoung The Pharmaceutical Society of Japan 2008 Chemical & pharmaceutical bulletin Vol.56 No.9
<P>A new naphthoquinone, (−)-3-[2-(acetyloxy)propyl]-2-hydroxy-8-methoxy-1,4-naphthoquinone (1) was isolated from the bulb of <I>Eleutherine americana</I> M<SMALL>ERR</SMALL>. <I>et</I> H<SMALL>EYNE</SMALL> (Iridaceae) together with two known compounds, eleutherinol (6) and 1,5-dihydroxy-3-methylanthraquinone (7) which were found in this species for the first time. The other known compounds, (−)-isoeleutherin (2), (+)-eleutherin (3), (−)-hongconin (4), and (+)-dihydroeleutherinol (5) which were reported previously from this species, were also isolated in the present study. Compounds 2—6 exhibited potent inhibitory activity on nitric oxide production in RAW 264.7 lipopolysaccharide-activated mouse macrophage cells with IC<SUB>50</SUB> values of 7.7, 11.4, 19.8, 21.7, and 34.4 μ<SMALL>M</SMALL>, respectively, whereas the other two compounds, 1 and 7, were inactive. The structure of compound 1 was elucidated by spectroscopic data analysis including 1D and 2D NMR experiments.</P>
Han, Ah-Reum,Kim, Hyo Young,So, Yangkang,Nam, Bomi,Lee, Ik-Soo,Nam, Joo-Won,Jo, Yeong Deuk,Kim, Sang Hoon,Kim, Jin-Baek,Kang, Si-Yong,Jin, Chang Hyun Hindawi 2017 International journal of analytical chemistry Vol.2017 No.-
<P>The flowers of<I> Chrysanthemum morifolium</I> Ramat. have been used as an herbal tea and in traditional medicine, and the plant has been developed to produce horticultural cultivars of various colors and shapes. In this study, a new chrysanthemum cultivar with dark purple petals (<I>C. morifolium</I> cv. ARTI-Dark Chocolate; ADC) was developed by radiation-induced mutation breeding of its original cultivar with purple striped white petals (<I>C. morifolium</I> cv. Noble Wine, NW). The phenolic profile and antioxidant property of ADC were investigated and compared with NW and the commercially available medicinal herb,<I> C. morifolium</I> with yellow petals (CM), in order to find a scientific support to produce a new source of natural antioxidant. Flavonoid and phenolic acid profiles of the ethanol extracts of the three flowers were analyzed by high-performance liquid chromatography-diode array detector-electrospray ionization mass spectrometry (HPLC-DAD-ESIMS), while antioxidant properties were evaluated using the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging assay. Among the tested flowers, ADC possessed the strongest antioxidant capacity and the highest phenolic contents. Flavonoids (acacetin, apigenin, luteolin, acacetin-7-<I>O</I>-<I>β</I>-glucoside, apigenin-7-<I>O</I>-<I>β</I>-glucoside, luteolin-7-<I>O</I>-<I>β</I>-glucoside, and linarin) and phenolic acids (chlorogenic acid and mixture of 1,4-, 1,5-, and 3,5-dicaffeoylquinic acids) were identified and quantified.</P>
Han, Ah-Reum,Kang, You-Jin,Windono, Tri,Lee, Sang Kook,Seo, Eun-Kyoung 이화여자대학교 약학연구소 2008 藥學硏究論文集 Vol.- No.17
A new prenlated chalcone, 3"",3"" -dimethylpyrano[3',4']2,4,2' -trihydroxychalcone(1), was isolated from the heartwood of Artocarpus communis. Two flavonoid derivatives, (-)-cycloartocarpin(9) and (-)-cudraflavone A(10), were isolated as new isomers. In addition, eight known flavonoids, isobacachalcone(2), morachalcone A(3), gemichalcones B(4) and C(5), artocarpin(6), cudraflavone C(7), licoflavone C(8), and (2S)-euchrenone a_(7)(11), were isolated and identified from this plant for the first time. Compounds 1-4.6, and 11 exhibited potent inhibitory activity on nitric oxide production in RAW264.7 LPS-activated mouse macrophage cells with IC_(50) values of 18.8, 6.4, 16.4, 9.3, 18.7, and 12.3, μM, respectively. The structure of compound 1 was elucidated by spectroscopic data analysis, including 1D and 2D NMR experiments.
Effect of Color Changes of Naturally Colored Organic Cotton Fibers on Human Sensory Perception
Han, Ah-Reum,Chae, Young-Joo,Lee, Myung-Eun,Cho, Gil-Soo THE KOREAN FIBER SOCIETY 2011 FIBERS AND POLYMERS Vol.12 No.7
This study aims to investigate the color changes of Naturally Colored Organic Cotton (NaCOC) fibers after scouring, and to evaluate the human sensory perception for the fibers. Furthermore, it tries to observe the relationship between the color coordinates and the sensory perception. Three colors (ivory, coyote-brown, green) of NaCOC fibers were scoured under four different treatments (boiling water, enzyme, sodium carbonate, sodium hydroxide). The color coordinates (L, a, b) were measured in CIELAB using spectrophotometer (SP62, X-Rite), and color differences (${\Delta}L$, ${\Delta}a$, ${\Delta}b$, ${\Delta}E$) were calculated. Human sensory perception for the NaCOCs was evaluated by 27 female participants. The questionnaire consisted of nine pairs of bipolar visual sensory adjectives using the SDS. The values of L and b fell, while the value of a arose after scouring in general. The value of ${\Delta}E$ was the highest when treated with alkali solutions among all treatments. Human sensory perception such as brightness, clearness, lightness and freshness generally decreased, while vividness and strength increased. The meaningful color factors to predict brightness, lightness were L and ${\Delta}L$, and those to predict vividness and strength sensory were ${\Delta}L$.
A New Flavanone Glycoside from the Dried Immature Fruits of <i>Poncirus trifoliata</i>
Han, Ah-Reum,Kim, Jong-Bin,Lee, Jun,Nam, Joo-Won,Lee, Ik-Soo,Shim, Chang-Koo,Lee, Kyung-Tae,Seo, Eun-Kyoung Pharmaceutical Society of Japan 2007 Chemical & pharmaceutical bulletin Vol.55 No.8
<P>A new flavanone glycoside, (2<I>R</I>)-5-hydroxy-4′-methoxyflavanone-7-<I>O</I>-{β-glucopyranosyl-(1→2)-β-glucopyranoside} (1), was isolated from the EtOAc extract of dried immature fruit of <I>Poncirus trifoliata</I>, together with three known compounds, (2<I>S</I>)-poncirin (2), (2<I>S</I>)-naringin (3), and (2<I>S</I>)-poncirenin (4). The structure of compound 1 was elucidated by spectroscopic data analysis, including 1D and 2D NMR experiments. Among the isolates, compound 2 exhibited considerable inhibitory activity against lipopolysaccharide (LPS)-induced prostaglandin E<SUB>2</SUB> (PGE<SUB>2</SUB>) and interleukin-6 (IL-6) production, and mRNA expression in RAW 264.7 murine macrophage cells.</P>