http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jiao, Lin,Chen, Ye,Kohama, Yoshimitsu,Graf, David,Bauer, E. D.,Singleton, John,Zhu, Jian-Xin,Weng, Zongfa,Pang, Guiming,Shang, Tian,Zhang, Jinglei,Lee, Han-Oh,Park, Tuson,Jaime, Marcelo,Thompson, J. D National Academy of Sciences 2015 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.112 No.3
<P><B>Significance</B></P><P>Conventional, thermally driven continuous phase transitions are described by universal critical behavior that is independent of microscopic details of a specific material. An analogous description is lacking for phase transitions that are driven at absolute zero temperature by a nonthermal control parameter. Classification of quantum-driven phase transitions is a fundamental but open problem that arises in diverse contexts and multiple classes of materials. Here we report the first observation, to our knowledge, of a sharp Fermi surface reconstruction while applying a strong magnetic field to suppress an antiferromagnetic transition to zero temperature. These experiments demonstrate that direct measurements of the Fermi surface can distinguish theoretically proposed models of quantum criticality and point to a universal description of quantum phase transitions.</P><P>Conventional, thermally driven continuous phase transitions are described by universal critical behavior that is independent of the specific microscopic details of a material. However, many current studies focus on materials that exhibit quantum-driven continuous phase transitions (quantum critical points, or QCPs) at absolute zero temperature. The classification of such QCPs and the question of whether they show universal behavior remain open issues. Here we report measurements of heat capacity and de Haas–van Alphen (dHvA) oscillations at low temperatures across a field-induced antiferromagnetic QCP (<I>B</I><SUB>c0</SUB> ≈ 50 T) in the heavy-fermion metal CeRhIn<SUB>5</SUB>. A sharp, magnetic-field-induced change in Fermi surface is detected both in the dHvA effect and Hall resistivity at [Formula] ≈ 30 T, well inside the antiferromagnetic phase. Comparisons with band-structure calculations and properties of isostructural CeCoIn<SUB>5</SUB> suggest that the Fermi-surface change at [Formula] is associated with a localized-to-itinerant transition of the Ce-4<I>f</I> electrons in CeRhIn<SUB>5</SUB>. Taken in conjunction with pressure experiments, our results demonstrate that at least two distinct classes of QCP are observable in CeRhIn<SUB>5</SUB>, a significant step toward the derivation of a universal phase diagram for QCPs.</P>
Huquan Gao,Tian-Jiao Zhu,De-Hai Li,Qian Qun Gu,Weizhong Liu 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.8
One new prenylated indole diketopiperazinealkaloid, named dihydroneochinulin B (1), one known spiropolyketide-diketopiperazine hybrid cryptoechinuline D (2)and three related known metabolites didehydroechinulin B(3), neoechinulin B (4) and auroglaucin (5) were isolatedfrom the mangrove rhizosphere soil derived fungus, Aspergilluseffuses H1-1. The structures were assigned by detailedspectroscopic analysis. The enantiomers of cryptoechinulineD (2) were separated to be (?)-cryptoechinuline D (2a) and(-)-cryptoechinuline D (2b) by chiral HPLC, and theirabsolute configurations were determined by ECD analysis. The cytotoxic effects of the compounds were preliminarilyevaluated on P388, HL-60, BEL-7402 and A-549 cell linesby SRB or MTT methods, and compounds 2, 2a and 3showed significant activities.
Li, De-Hai,Zhu, Tian-Jiao,Liu, Hong-Bing,Fang, Yu-Chun,Gu, Qian-Qun,Zhu, Wei-Ming The Pharmaceutical Society of Korea 2006 Archives of Pharmacal Research Vol.29 No.8
Four known butenolides were isolated from the ethyl acetate extracts of the culture broth of the marine-derived bacterium, Streptoverticillium luteoverticillatum, by bioassay-guided fractionation. The structures were identified on the basis of spectral data. The absolute configuration of compound (1) was determined by CD spectrum for the first time. Compounds 1-4 showed in vitro cytotoxicity against the murine lymphoma P388 and human leukemia K562 cell lines. This is the first report on the isolation of butenolides from the marine bacterium, Streptoverticillium luteoverticillatum, and their cytotoxic activities.
Zhi-Hong Xin,Li-Tian,Tian-jiao Zhu,Wen-Liang Wang,Lin Du,Yu-chun Fang,Qian-Qun Gu,Wei-Ming Zhu 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.7
Two isocoumarin derivatives, stoloniferol A (1) and B (2), a known 5α, 8α-epidioxy-23-methyl- (22E, 24R)-ergosta-6, 22-dien-3β-ol (3), and a known dihydrocitrinone (4) were isolated from the ethyl acetate extract of the sea squirt-derived fungus, Penicillium stoloniferum QY2-10, and a halophilic fungus, Penicillium notatum B-52, respectively. Their structures were elucidated by spectroscopic methods and optical rotation. The stereochemistry of 2 was determined on the basis of different NOE experiments and chemical transformation. Compound 3 showed cytotoxicity against P388 cells, with an IC50 value of 4.07 µM.
Xin, Zhi-Hong,Tian, Li,Zhu, Tian-Jiao,Wang, Wen-Liang,Du, Lin,Fang, Yu-Chun,Gu, Qian-Qun,Zhu, Wei-Ming 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.7
Two isocoumarin derivatives, stoloniferol A (1) and B (2), a known $5{\alpha}$, $8{\alpha}-epidioxy-23-methyl-(22E, 24R)-ergosta-6$, $22-dien-3{\beta}-ol$ (3), and a known dihydrocitrinone (4) were isolated from the ethyl acetate extract of the sea squirt-derived fungus, Penicillium stoloniferum QY2-10, and a halophilic fungus, Penicillium notatum B-52, respectively. Their structures were elucidated by spectroscopic methods and optical rotation. The stereochemistry of 2 was determined on the basis of different NOE experiments and chemical transformation. Compound 3 showed cytotoxicity against P388 cells, with an $IC_{50}$ value of 4.07 ${\mu}M$.
De-Hai Li,Tian-Jiao Zhu,Hong-Bing Liu,Yu-Chun Fang,Qian-Qun Gu,Wei-Ming Zhu 대한약학회 2006 Archives of Pharmacal Research Vol.29 No.8
Four known butenolides were isolated from the ethyl acetate extracts of the culture broth of the marine-derived bacterium, Streptoverticillium luteoverticillatum, by bioassay-guided fractionation. The structures were identified on the basis of spectral data. The absolute configuration of compound (1) was determined by CD spectrum for the first time. Compounds 1-4 showed in vitro cytotoxicity against the murine lymphoma P388 and human leukemia K562 cell lines. This is the first report on the isolation of butenolides from the marine bacterium, Streptoverticillium luteoverticillatum, and their cytotoxic activities.
Aiqun Lin,Guangwei Wu,Qian Qun Gu,Tian-Jiao Zhu,De-Hai Li 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.7
Chemical investigation of an Antarctic deepseaderived fungus Penicillium sp. PR19 N-1 yielded fivenew eremophilane-type sesquiterpenes 1–5 and a new rarelactam-type eremophilane 6, together with three knowncompounds 7–9. The structures of these diverse sesquiterpeneswere determined by extensive NMR and massspectroscopic analyses. Compounds 1, 2, 4–6, 8 and 9 wereevaluated for their cytotoxities against HL-60 and A-549human cancer cell lines, and 5 was the most active one withIC50 value of 5.2 lM against the A-549 cells.
Two New Metabolites with Cytotoxicities from Deep-Sea Fungus, Aspergillus sydowi YH11-2
De-Hai Li,Sheng-Xin Cai,Li Tian,Zhen-Jian Lin,Tian-Jiao Zhu,Yu-Chun Fang,Pei-Pei Liu,Qian-Qun Gu,Wei-Ming Zhu 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.9
Two new compounds, 2, 3, 5-trimethyl-6-(3-oxobutan-2-yl)-4H-pyran-4-one (1) and (2R)-2, 3- dihydro-7-hydroxy-6, 8-dimethyl-2-[(E)-prop-1-enyl] chromen-4-one (2), together with six known compounds (3-8), were isolated from a deep-sea fungus, identified as Aspergillus sydowi, by a bioassay-guided method. Their structures were elucidated by spectroscopic methods and the cytotoxicities were evaluated by SRB method.
Saroclazines A–C, thio-diketopiperazines from mangrove-derived fungi Sarocladium kiliense HDN11-84
Feng Li,Wenqiang Guo,Li Wu,Tian-jiao Zhu,Qian Qun Gu,De-Hai Li,Qian Che 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.1
Three new diketopiperazine derivatives (DKPs), saroclazines A–C (1–3) along with three known DKPs (4– 6) were isolated from mangrove-derived fungi Sarocladium kiliense HDN11-84. Saroclazines A–B (1 and 2) possessed a free amide structure, which was first found in sulfurcontaining aromatic DKPs. Their structures were elucidated by NMR, HRESIMS and X-ray. The cytotoxic activity of new compounds (1–3) was tested against HeLa cell lines, among which compound 2 showed an IC50 value of 4.2 lM.
Two New Metabolites with Cytotoxicities from Deep-Sea Fungus, Aspergillus sydowi YH11-2
Li, De-Hai,Cai, Sheng-Xin,Tian, Li,Lin, Zhen-Jian,Zhu, Tian-Jiao,Fang, Yu-Chun,Liu, Pei-Pei,Zhu, Wei-Ming,Gu, Qian-Qun 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.9
Two new compounds, 2, 3, 5-trimethyl-6-(3-oxobutan-2-yl)-4H-pyran-4-one (1) and (2R)-2, 3-dihydro-7-hydroxy-6, 8-dimethyl-2-[(E)-prop-1-enyl] chromen-4-one (2), together with six known compounds (3-8), were isolated from a deep-sea fungus, identified as Aspergillus sydowi, by a bioassay-guided method. Their structures were elucidated by spectroscopic methods and the cytotoxicities were evaluated by SRB method.