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Phytochemical Constituents from Acanthopanax divaricatus var. albeofructus
Cai, Xing Fu,Shen, Guanghai,Dat, Nguyen Tien,Lee, Eun Joo,Kim, Young Ho 충남대학교 약학대학 의약품개발연구소 2005 藥學論文集 Vol.20 No.-
Five known compounds were isolated from the methanolic extract of the roots of Acanthopanax divaricatus var. albeofructus through repeated silica gel and YMC gel column chromatography. Their chemical structures were elucidated as farnesol (1), linoleic acid (2), stigmasterol (3), (-)-sesamin (4), and falcarindiol (5) by spectroscopic analysis.
Efficient Anonymous Broadcast Encryption with Adaptive Security
( Fu-cai Zhou ),( Mu-qing Lin ),( Yang Zhou ),( Yu-xi Li ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.11
Broadcast encryption is an efficient way to distribute confidential information to a set of receivers using broadcast channel. It allows the broadcaster to dynamically choose the receiver set during each encryption. However, most broadcast encryption schemes in the literature haven`t taken into consideration the receiver`s privacy protection, and the scanty privacy preserving solutions are often less efficient, which are not suitable for practical scenarios. In this paper, we propose an efficient dynamic anonymous broadcast encryption scheme that has the shortest ciphertext length. The scheme is constructed over the composite order bilinear groups, and adopts the Lagrange interpolation polynomial to hide the receivers` identities, which yields efficient decryption algorithm. Security proofs show that, the proposed scheme is both secure and anonymous under the threat of adaptive adversaries in standard model.
Cai, Xing-Fu,Shen, Guanghai,Dat, Nguyen-Tien,Kang, Ok-Hwa,Lee, Young-Mi,Lee, Jung-Joon,Kim, Young-Ho The Pharmaceutical Society of Korea 2003 Archives of Pharmacal Research Vol.26 No.9
Five known kaurane type diterpenoids, 16$\alpha$H, 17-isovaleryloxy-ent-kauran-19-oic acid (1), 16$\alpha$-hydroxy-17-isovaleryloxy-ent-kauran-19-oic acid (2), paniculoside-IV (3), 16$\alpha$-hydroxy-ent-kauran-19-oic acid (4), and ent-kaur-16-en-19-oic acid (5) were isolated from the root of Acanthopanax koreanum by repeated column chromatography and reversed phase preparative HPLC. The structures of these compounds were established from physicochemical and spectral data. Among the isolated compounds 16$\alpha$H, 17-isovaleryloxy-ent-kauran-19-oic acid (1) showed potent inhibitory activity ($IC_50$ value, 16.2 $\mu$ M) on TNF-$\alpha$ secretion from HMC-1, a trypsin-stimulated human leukemic mast cell line.
Triterpenoids from Acanthopanax koreanum Root and Their Inhibitory Activities on NFAT Transcription
Cai, Xing-Fu,Lee, Im-Seon,Shen, Guanghai,Dat, Nguyen-Tien,Lee, Jung-Joon,Kim, Young-Ho The Pharmaceutical Society of Korea 2004 Archives of Pharmacal Research Vol.27 No.8
Two triterpenoids (1,4) and two triterpenoid glycosides (2,3) were isolated from the root of Acanthopanax koreanum (Araliaceae). Their structures were identified as impressic acid (1), acankoreoside A (2), 3-epi-betulinic acid 28-O-[(${\alpha}-L-rhamnopyranosyl(1{\rightarrow}4)-{\beta}-D-glucopyrano-syl(1{\rightarrow}6)]-{\beta}-D-glucopyranosyl]$ ester (3), and ursolic acid (4) by physicochemical and spectro-scopic methods. Of these compounds, impressic acid (1) exhibited a potent inhibitory activity against NFAT transcription factor ($IC_{50}:{\;}12.65{\;}{\mu\textrm{m}}$).
Inflation beyond T-models and primordial <i>B</i>-modes
Cai, Yi-Fu,Gong, Jinn-Ouk,Pi, Shi North-Holland Pub. Co 2014 Physics letters. Section B Vol.738 No.-
<P><B>Abstract</B></P> <P>We describe extended theories which shares the gauge transformation symmetry of the T-models, and takes the T-models as well as Starobinsky model as special cases. We derive a general relation between the two slow-roll parameters, and find that a large class of models can be embedded. Such models include more general Starobinsky-like inflation as well as the chaotic inflation with a large tensor-to-scalar ratio consistent with the BICEP2 result.</P>
Inhibitory Lignans against NFAT Transcription Factor from Acanthopanax koreanum
Xing Fu Cai,Im Seon Lee,Nguyen Tien Dat,Guanghai Shen,강종성,Dong Hyun Kim,Young Ho Kim 대한약학회 2004 Archives of Pharmacal Research Vol.27 No.7
Three lignans isolated from the roots of A. koreanum (Araliaceae), namely eleutheroside E (1), tortoside A (2), and hemiariensin (4), were evaluated for their ability to inhibit NFAT transcription factor. Of these compounds, compound 4, possessing a diarylbutane skeleton, exhibited potent inhibitory activity against NFAT transcription factor (IC50: 36.3 ± 2.5 mM). However, the activities of 1 (IC50: > 500 mM) and 2 (IC50: 136.1 ± 9.4 mM), which possess bisaryldioxabicyclooctane skeletons, were lower. As the lignan derivatives of the same skeletons, hinokinin (5) and (-)-yatein (6) with diarylbutane skeletons and (+)-syringaresinol (3) with a bisaryldioxabicyclooctane skeleton were also studied for their inhibitory effects on NFAT transcription factor.