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이사원,최한곤,박정일,김종국 영남대학교 약품개발연구소 2000 영남대학교 약품개발연구소 연구업적집 Vol.10 No.-
To develop a dry alcohol containing red ginseng extract, dry alcohols composed of ethanol, water, dextrin and sodium lauryl sulfate were prepared using spray dryer, and their ethanol contents and encapsulation efficiencies were deter-mined. An optimal dry alcohol containing red ginseng extract was chosen and the feeling for its oral administration was eval-uated. Dextrin at dextrin/water weight ratios below 1.6/1 and ethanol at ethanol/water weight ratios below 1/1 remarkably increased both the ethanol contents and encapsulation efficiencies of dry alcohols. However, dextrin at dextrin/ water weight ratios above 1.6/1 and ethanol at ethanol/water weight ratio above 1/1 slightly decreased the both parameters. It might be due to the low solubility of dextrin in ethanol and limited diffusion coefficient of ethanol to the dextrin shell. Furthermore, 0.5%(w/w) sodium lauryl sulfate gave the maximum ethanol content of dry alcohol. The more increased amounts of red ginseng extract were added, the more increased amounts of ginsenoside Rb1 but the more decreased amounts of ethanol were encap-sulated in dry alcohols. A dry alcohol containing red ginseng extract was prepared with dextrin/ethanol/water(1/1/1, w/w/w) mixed solution, in which 0.5%(w/w) sodium lauryl sulfate and 20%(w/w) red ginseng extract were dissolved. It contained the ethanol contents of 31.17±1.33%(w/w) and ginsengoside Rb1 of 243.0±7.0㎍/g. It gave the moderate taste of red ginseng extract at its oral administration with or without water. Thus, the dry alcohol containing red ginseng extract can be further developed as a more convenient dosage form for red ginseng extract.
Analysis of Alkaloids in the Seeds of Zizyphus jujuba by High Performance Liquid Chromatography
Park, Man-Ki,Park, Jeong-Hill,Shin, Young-Geun,Cho, Kyung-Hee,Han, Byung-Hoon,Park, Myung-Hwan The Pharmaceutical Society of Korea 1991 Archives of Pharmacal Research Vol.14 No.2
A hight performance liquid chromatographic methods was developed for the seperation and determination of seven alkaloids in "sanjoin" (the seeds of Zizyphus jujuba Rhamnaceae), a plant with potent sedative activity. A reverse phase system of Lichrosorb RP-Select B column and 0.05 M potassium phosphate buffer (pH = 3.5)-acetonitrile with gradient elution was employed. Two known alkaloids, juzirine and lysicamine, were newly isolated fom "sanjoin"."sanjoin".oin&".ot;.
Ionophore Activity of Frangufoline
Park, Man-Ki,Park, Jeong-Hill,Cho, Jung-Hwan,Park, Jun-Kyu,Han, Yong-Nam,Han, Byung-Hoon The Pharmaceutical Society of Korea 1991 Archives of Pharmacal Research Vol.14 No.2
The ionophore activity of frangufoline (1), a sedative cyclopeptide alkaloid isolated from Zizyphus jujuba, was investigated by UV and CD spectroscopic methods. Frangufoline (1) showed ion binding activity to calcium and magnesium ions.
Four New Acetylated Ginsenosides from Processed Ginseng(Sun Ginseng)
Park, Il-Ho,Han, Sang-Beom,Kim, Jong-Moon,Piao, Longzhu,Kwon, Sung-Won,Kim, Na-Young,Kang, Tak-Lim,Park, Man-Ki,Park, Jeong-Hill The Pharmaceutical Society of Korea 2002 Archives of Pharmacal Research Vol.25 No.6
Four new acetylated ginsenosides were isolated from the processed ginseng (SG, sun ginseng). Their structures were determined to be $3{\beta},{\;}12{\beta}-dihydroxydammar-20(22),24-diene-3-O-{\beta}-D-glucopyranosyl(1{\rightarrow}2)-{\beta}-D-6"-O-acetylglucopyranoside;{\;}3{\beta},12{\beta}-dihydroxydammar-20(21),{\;}24-diene-3-O-{\beta}-D-glucopyranosyl(1{\rightarrow}2)-{\beta}-D-6"-O-acetylglucopyranoside;{\;}3{\beta},{\;}6{\alpha},12{\beta}-trihydroxydammar-20(22),24-diene-6-O-{\beta}-D-6'-O-acetylglucopyranoside{\;}and{\;}3{\beta},6{\alpha},12{\beta}-trihydroxydammar-20(21),24-diene-6-O-{\beta}-D-6'-O-acetylglucopyranoside$ based on spectroscopic evidences. The compounds were named ginsenoside $Rs_4,{\;}Rs_5,{\;}RS_6{\;}and{\;}Rs_7$, respectively.pectively.
Rapid Hydrolysis of Ginseng Saponin by Microwave Oven Reaction
Park, Man Ki,Park, Jeong Hill,Kang, Jong Seong,Lee, Mi Young,Park, Young In,Yu, Su Jeong,Han, Byung Hoon 충남대학교 약학대학 의약품개발연구소 1993 藥學論文集 Vol.9 No.-
전자렌지의 고온 고압 반응을 이용하여 인삼 사포닌을 사포게닌으로 신속하게 가수분해하는 방법을 개발하였다. 인삼 추출물의 5% 황산 용액을 PTFE 반응 용기에 넣고 전자렌지에서 가수분해시킨 결과 10분에서 가장 양호한 결과를 나타내었다. 이는 일반적으로 사용되는 환류에 의한 가수분해 방법보다 30배 이상 빠른 것이다. A new and rapid method for the hydrolysis of ginsenosides to panaxadiol or panaxatriol was developed. It is based on the microwave oven reaction, which is high temperature and high pressure reaction. The optimal hydrolysis time using 5% H_2SO_4 solution was found at 10 min with PTFE reaction vessel in microwave oven, which is more than 30 times faster than the conventional hydrolysis method.
Analysis of Ginsenosides by Thermospray LC/MS
Park, Man-Ki,Park, Jeong-Hill,Hwang, Gwi-Seo,Lee, Mi-Young,Park, In-Jeong The Korean Society of Ginseng 1995 Journal of Ginseng Research Vol.19 No.2
Ginseng saponins were analyzed by thermospray (TSP) LCMS method using ODS column and with acetonitrile/ammonium acetate solution. Optimal condition for TSP Lchfs was found as follows: capillary temperature: 33$0^{\circ}C$ repelled voltage: 200 V, and concentration of ammonium acetate: 0. 05 M. Panaxadiol and panaxatriol type saponins showed characteristic fragment ions. The calibration curve of ginseng saponin showed good linearity with a correlation coefficient of 0.99. Detection limits using selected ion monitoring (SIM) technique were improved by 10~200 times compared to conventional HPLCnnr detection method.
Photo-induced hybrid nanopatterning of titanium dioxide <i>via</i> direct imprint lithography
Park, Hyeong-Ho,Choi, Dae-Geun,Zhang, Xin,Jeon, Sohee,Park, Seong-Je,Lee, Soon-Won,Kim, Sarah,Kim, Ki-don,Choi, Jun-Hyuk,Lee, Jihye,Yun, Dae Keun,Lee, Ki Joong,Park, Hyung-Ho,Hill, Ross Henry,Jeong, J Royal Society of Chemistry 2010 Journal of materials chemistry Vol.20 No.10
<P>A novel ultraviolet (UV)-assisted imprinting procedure that employs photosensitive titanium(<SMALL>IV</SMALL>) di-n-butoxide bis(2-ethylhexanoate) is presented for the fabrication of well-ordered titanium dioxide (TiO<SUB>2</SUB>) nanostructures at room temperature. The main novelty of this technique is the use of the photosensitive titanium organic compound, rather than a commonly used UV-curable resin, for direct UV-assisted nanoimprint lithography. Fourier transform infrared and X-ray photoelectron spectroscopy studies suggest that exposure to UV light resulted in the gradual removal of organic groups from films prepared from titanium(<SMALL>IV</SMALL>) di-n-butoxide bis(2-ethylhexanoate) photochemically and successively converted the films to TiO<SUB>2</SUB> at room temperature. This approach allows direct fabrication of TiO<SUB>2</SUB> nanopatterns with lines down to 35 nm in width, hole arrays of 265 nm in diameter, and three-dimensional TiO<SUB>2</SUB> hybrid micro/nano-patterns without observable defects for use in applications where ordered surface nanostructures are required, such as photovoltaics, photonics, and optical waveguides.</P> <P>Graphic Abstract</P><P>A novel UV-assisted imprinting procedure that employs photosensitive Ti(<SMALL>IV</SMALL>) di-n-butoxide bis(2-ethylhexanoate) is presented for the fabrication of well-ordered TiO<SUB>2</SUB> and 3-D TiO<SUB>2</SUB> hybrid micro/nano-patterns at room temperature. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b921343k'> </P>
Rapid Hydrolysis of Ginseng Saponin by Microwave Oven Reaction
Park, Man-Ki,Park, Jeong-Hill,Kang, Jong-Seong,Lee, Mi-Young,Park, Young-In,Yu, Su-Jeong,Han, Byung-Hoon The Korean Society of Ginseng 1993 Journal of Ginseng Research Vol.17 No.1
A new and rapid method for the hydrolysis of ginsenosides to panaxadiol or panaxatriol was developed. It is based on the microwave oven reaction, which is high temperature and high-pressure reaction. The optimal hydrolysis time using 5% $H_2SO_4$ solution was found at 10 min PTFE reaction vessel in microwave oven, which is more than 30 times faster than the conventional hydrolysis method.