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Wan Kyun Whang,Min-Won Lee,최형균 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.4
The metabolic discrimination of safflowers from various geographical origins was performed using 1H nuclear magnetic resonance (NMR) spectroscopy followed by principal components analysis. With a combination of these techniques, safflower samples from different origins could be discriminated using the first two principal components (PC) of the 1H NMR spectra of the 50% methanol fractions. PC1 and PC2 accounted cumulatively for 91.3% of the variation in all variables. The major peaks in the 1H NMR spectra that contributed to the discrimination were assigned to fatty acid (terminal CH3), lactic acid, acetic acid, choline derivatives, glycine, and safflower yellow derivatives. In this study, we suggest that various types of safflower can be discriminated using PCA and 1H NMR spectra.
Whang, Wan-Kyun,Lee, Min-Won,Choi, Hyung-Kyoon Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.4
The metabolic discrimination of safflowers from various geographical origins was performed using 1H nuclear magnetic resonance (NMR) spectroscopy followed by principal components analysis. With a combination of these techniques, safflower samples from different origins could be discriminated using the first two principal components (PC) of the 1H NMR spectra of the 50% methanol fractions. PC1 and PC2 accounted cumulatively for 91.3% of the variation in all variables. The major peaks in the 1H NMR spectra that contributed to the discrimination were assigned to fatty acid (terminal CH3), lactic acid, acetic acid, choline derivatives, glycine, and safflower yellow derivatives. In this study, we suggest that various types of safflower can be discriminated using PCA and 1H NMR spectra.
Flavonoids from Codonopsis lanceolata Leaves
Whang, Wan-Kyunn,Park, Kyun-Young,Chung, Sung-Hoon,Oh, In-Se,Kim, Il-Hyuk The Korean Society of Pharmacognosy 1994 생약학회지 Vol.25 No.3
For the investigation of resources in Codonopsis species, the studies were carried out to evaluate the pharmaco-constituents from the leaves of Codonopsis lanceolata (Campanulaceae) whose roots have been used to antitussive, expectorant, detoxicate, tonic, edible, etc. as a folk medicine in Korea. From the EtOAc and BuOH fractions of MeOH extract, three flavonoid compounds, $luteolin-7-O-{\beta}-_D-glucopyranoside$$(C_{21}H_{20}O_{1i},\;mp\;254{\sim}255^{\circ}$, compound 1), $luteolin-5-O-{\beta}-_D-glucopyranoside$$(C_{21}H_{20}O_{1i},\;mp\;279{\sim}281^{\circ}$, compound 2) and luteolin $(C_{15}H_{10}O_6,\;mp\;327{\sim}330^{\circ}$, compound 3) were isolated and identified on the basis of their physicochemical properties and spectroscopic evidences(UV, IR, $^1H-NMR$, $^{13}C-NMR$, MS etc.) in comparison with authentics respectively.
Studies on the Anti-Inflammatory Effects of Clerodendron trichotomum Thunberg Leaves
Choi, Jung-Ho,Whang, Wan-Kyun,Kim, Hong-Jin The Pharmaceutical Society of Korea 2004 Archives of Pharmacal Research Vol.27 No.2
Clerodendron trichotomum Thunberg Leaves (CTL) have been used for centuries in Chinese folk medicine for their anti-inflammatory properties. We have studied the anti-inflammatory effects of CTL extracts in rats, mice and in Raw 264.7 cells. 1 mg/kg solutions of the 30% and 60% methanol extracts of CTL were used and a 1 mg/kg of indomethacin was used as a positive anti-inflammatory standard; these were then administrated to rats. Carrageenan was injected subcutaneously to induce hind paw edema in rats. The result of carrageenan-induced rat paw oedema showed that a 1 mg/kg of the 30%, and 60% methanol fraction of CTL and 1 mg/kg of indomethacin inhibited the hind paw edema by 19.5%, 23.0%, and 20.5% respectively. The effect of CTL on inflammation in mice by a capillary permeability assay was examined by detecting Evans blue leakage from capillaries after the intraperitoneal injection of acetic acid, a potent inflammatory stimulus. The 60% methanol fraction of CTL inhibited Evans blue dye leakage by 47.0%, which was 10% higher than that of the inhibition of 1 mg/kg of indomethacin. Also, the 60% methanol fraction of CTL suppressed the prostaglandin $E_2$ ($PGE_2$) generation in RAW 264.7 macrophage cells after treatment with lipopolysaccharide (LPS) by as much as the inhibition of 1 mg/kg of indomethacin and this led to the synthesis of $PGE_2$ by COX-2 induction. The inhibition of the carrageenan-induced rat paw oedema, vascular permeability and the $PGE_2$ generation demonstrates that the 60% methanol fraction of CTL contains a potent anti-inflammatory activity.
Constituents of Crataegus Pinnatifida Var. psilosa Leaves (II) -Flavonoide from BuOH Fraction-
Oh, In-Se,Whang, Wan-Kyun,Kim, Il-Hyuk The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.5
The studies were camied out to evaluate the constituents in the leaves of Crataegus pinnatifida var. psilosa (Rosaceae) continuously. From the BuOH fraction of the MeOH extract, four flavonoid compounds, hyperoside (1), vitexin (2), 3"-O-rhamnosylvitexin (3) and $quercetin-3-O-{\alpha}-L-rhamnopyranoslyl-(1{\rightarrow}6)-{\beta}$-D-galactopyranoside (4) were isolated and identified on the basis of their physico-chemical properties and spectroscopic evidences by comparison with authentic samples.
한성태(Sung Tai Han),황완균(Wan Kyun Whang),김일혁(Il Hyuk Kim),양병욱(Byung Wook Yang),조순현(Soon Hyun Cho),고성권(Sung Kwon Ko) 대한약학회 2005 약학회지 Vol.49 No.6
The objective of this study is to provide the basic information for developing a high-value ginseng product using ginseng saponin and prosapogenin. In order to achieve such aim, Ginsenoside compositions of black ginseng (BG) extracts with various solvent conditions were examined by HPLC. The total saponin and the prosapogenin content of 95% ethyl alcohol extract were higher than that of the either 50% ethyl alcohol extract or distilled water extract. As a result, the order of the total saponin and the prosapogenin content was 1) 95% ethyl alcohol, 2) 50% ethyl alcohol, 3) the first and second mixture of 95% ethyl alcohol, distilled water, and 4) distilled water extract. In the case of fine black ginseng (FBG), the first and second mixture extracts of 95% ethyl alcohol and distilled water were the highest. In addition, the ratio of the protopanaxadiol group and the protopanaxatriol group (PD/PT) showed that the ratio of BG ranged from 0.304 to 0.601, while the ratio of FBG ranged from 1.166 to 1.657.
Sun A Lee,Hee Kyung Jo,Byung Ok Im,Sungun Kim,Wan Kyun Whang,Sung Kwon Ko 고려인삼학회 2012 Journal of Ginseng Research Vol.36 No.1
This study compared the contents of ginsenosides depending on steaming conditions of red ginsengs to provide basic information for developing functional foods using red ginsengs. The red ginseng steamed eight times at 98℃ ranked atop the amounts of prosapogenins ever detected in red ginsengs (ginsenoside Rg₂, Rg₃, Rg?, Rg?, Rh₁, Rh₄, Rk₁, Rk₃, F₁, F₄, 1.15%) among red ginsengs steamed more than twice. When steamed eight times at 98℃, 2.7 times as much prosapogenins such as ginsenosides Rg₂, Rg₃, Rg?, Rg?, Rh₁, Rh₄, Rk₁, Rk₃, F₁, and F₄ as those steamed just once at 98℃ was collected. In addition, the red ginsengs steamed eight times at 98℃ contained more amounting ginsenoside Rg₃ (0.28%) than that in the red ginseng steamed several times at random. Accordingly, it is recommendable that red ginsengs steamed 8 times, which proved to be the optimal steaming condition, be used rather than those steamed 9 times (black ginsengs), in order to develop red ginseng products of high prosapogenin concentration and high functions.