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Analysis Theory of Asymmetric dc SQUID Driven by Thermal Noises

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Communications in Theoretical Physics 2004年第5期41卷 707-714页

作者： Lǖhai-feng JIAYa HUANGXin-tang DepartmentofPhysics CentralChinaNormalUniversityWuhan430079China

An analysis expression for the stationary probability distribution of asymmetric superconducting quantum interference device with two Josephson junctions (dc SQUID) driven by thermal noise is derived from two-dimensional Fokker-Planck equation, where the potential condition is satisfied. Two of the three asymmetric parameters, inductance asymmetric parameter η and critical current asymmetric parameter α, can be changed in this condition, but resistance asymmetric parameter ρ cannot be changed. The 'ripple' phenomenon of circulating current can disappear with the change of coefficient α. The effects of asymmetric parameters on current-voltage relationship and transfer function of dc SQUID system are also represented.

关键词： noise Fkker-Planck equation superconducting quantum interference device

A new polyhydroxysteroidal glycoside from the starfish Anthenea chinensis

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Chinese Chemical Letters 2009年第10期20卷 1231-1234页

作者： Ning Ma hai feng tang feng Qiu Hou Wen Lin Xiang Rong-Tian Wei Zhang Department of Pharrnacy Xijing Hospital Fourth Military Medical University Xi'an 710032 China School of Traditional Chinese Medicines Shenyang Pharmaceutical University Shenyang 110016 China Department of Pharmacy Changzheng Hospital Second Military Medical University Shanghai 200003 China

A new polyhydroxysteroidal glycoside, （20R,24R）-16-O-（4-O-methyl-2-acetamido-2-deoxy-β-D-galactopyranosyl）-24-ethyl- 5α-cholest-8（14）-en-313,613,713,16α-tetrol （anthenoside A, 1）, was isolated from the starfish Anthenea chinensis. Its structure was elucidated by extensive spectral analysis and chemical evidences. 1 exhibited significant cytotoxicity against human tumor K-562, BEL-7402 and U87MG cells.

关键词： Starfish Anthenea chinensis Polyhydroxysteroidal glycoside Anthenoside A

Two new 24-hydroxylated asterosaponins from Culcita novaeguineae

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Chinese Chemical Letters 2009年第10期20卷 1227-1230页

作者： Xiao Guang Ma hai feng tang Chang hai Zhao Ning Ma Min Na Yao Ai Dong Wen Department of Pharmacy Xijing Hospital Fourth Military Medical University Xi'an 710032 China Hospital of Xi'an University of Finance and Economics Xi'an 710061 China Department of Nutrition Xijing Hospital Fourth Military Medical University Xi'an 710032 China

Two new 24-hydroxylated asterosaponins, sodium （20R,24S）-6α-O-（4-O-sodiumsulfato-β-D-quinovopyranosyl）-5α-cholest- 9（11）-en-3β,24-diol 3-sulfate （1） and sodium （20R,24S）-6α-O-β-O-methyl-β-D-quinovopyranosyl-（1→2）-β-D-xylopyranosyl- （1 → 3）-[3-D-glucopyranosyl]-5α-cholest-9（11）-en-3β,24-diol 3-sulfate （2）, were isolated from the starfish Culcita novaeguineae. Their structures were elucidated by extensive spectral analysis and chemical evidences.

关键词： Starfish Culcita novaeguineae Steroidal glycoside Asterosaponin

Cytotoxic triterpenoid saponins from Ardisia pusilla

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Chinese Chemical Letters 2009年第2期20卷 193-196页

作者： hai feng tang Hou Wen Lin Xiao Li Chen Guang Cheng Yue Ping Zhao Ai Dong Wen Department of pharmacy Xijing Hospital Fourth Military Medical University Xi'an 710032 China Department of Pharmacy Changzheng Hospital Second Military Medical University Shanghai 200003 China Department of Neurosurgery Xijing Hospital Fourth Military Medical University Xi'an 710032 China

A new triterpenoid saponin, 3-O-{ β-D-xylopyranosyl-（1 → 2）-β-D-glucopyranosyl-（1 → 4）-[β-D-glucopyranosyl-（1 → 2）]-α- L-arabinopyranosyl}-3β,16α,28α-trihydroxy-13β,28-epoxy-oleanan-30-al （ardipusilloside Ⅲ, 1）, together with two known saponins, ardisiacrispins A （2） and B （3）, were isolated from the whole plants of Ardisia pusilla A. DC. Their structures were elucidated by extensive spectral analysis and chemical evidences. Saponins 1 and 3 exhibited significant cytotoxicity against human glioblastoma U251MG cells.

关键词： Ardisia pusilla Triterpenoid saponin Ardipusilloside Ⅲ Cytotoxic activities

17-Dehydroxyholothurin A, a New Sulfated Triterpene Glycoside from Sea Cucumber Holothuna impatiens

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Chinese Chemical Letters 2006年第11期17卷 1454-1456页

作者： Peng SUN Yang Hua YI Ling LI Min GUI hai feng tang Da Zhi ZHANG Shi Long ZHANG Research Center for Marine Drugs Pharmacy School Second Military Medical University Shanghai 200433 Division of Antitumor Pharmacology State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 201203 Department of Pharmacy Xijing Hospital 4th Military Medical University Xi＇an 710032 Departrnent of Organic Chemistry Pharmacy School Second Military Medical University Shanghai 200433

Abstract： A new sulfated triterpene glycoside named as 17-dehydroxyholothurin A 1 was isolated from the sea cucumber Holothuria impatiens. Its structure was elucidated on the basis of spectroscopic data （2D NMR and MS） and chemical evidence. Compound 1 showed cytotoxic activity against cancer cell lines MKN-28, MFC-7, KB, HL-60 and Hep G2 with IC50 values of 1.98, 4.53, 2.01, 4.69 and 2.80 ×10^-6 tool/L, respectively.

关键词： Sea cucumber Holothuria impatiens 17-dehydroxyholothurin A triterpene glycoside.

A New Chromone Glycoside from Cassia siamea Lam.

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Chinese Chemical Letters 2001年第8期12卷 703-704页

作者： Tai Sheng LU Yang Hua YI Shi Long MAO Da Zheng ZHOU Qiang Zhi XU hai feng tang Shu Yu ZHANG Center of Marine Drug Research School of PharmacySecond Military Medical UniversityShanghai 200433

2-methyl-5-propyl-7, 12-dihydroxy chromone-12-O-β-D-glucopyranoside was isolated from the stem of Cassia siamea. The structure was elucidated by chemical and spectral evidences.

关键词： Cassia siamea 2-methyl-5-propyl-7 12-dihydroxy-chromone-12-O-β-D-glucopyrano-side

Derivation of Expanded Isospectral-Nonisospectral Integrable Hierarchies via the Column-vector Loop Algebra

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 778-800页

作者： hai-feng WANG Yu-feng ZHANG School of Science Jimei UniversityXiamen 361021China School of Mathematics China University of Mining and TechnologyXuzhou 221116China

A scheme for generating nonisospectral integrable hierarchies is *** on the method,we deduce a nonisospectral hierarchy of soliton equations by considering a linear spectral *** follows that the corresponding expanded isospectral and nonisospectral integrable hierarchies are deduced based on a 6 dimensional complex linear space ■.By reducing these integrable hierarchies,we obtain the expanded isospectral and nonisospectral derivative nonlinear Schr?dinger *** using the trace identity,the biHamiltonian structure of these two hierarchies are also ***,some symmetries and conserved quantities of the resulting hierarchy are discussed.

关键词： expanded isospectral-nonisospectral integrable hierarchies column-vector loop algebra bi-Hamiltonian structure symmetry

Two-color emissive AIEgens with anti-Kasha property for dual-organelle imaging and phototherapy

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Science China Chemistry 2024年第5期67卷 1740-1752页

作者： Pu Chen Guogang Shan Qingli Nie Yuting Yan Pengfei Zhang Zujin Zhao hai-Tao feng Ben Zhong tang AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China Institute of Functional Material Chemistry and National&Local United Engineering Lab for Power Battery Faculty of ChemistryNortheast Normal UniversityChangchun 130024China College of Chemistry&Materials Science Northwest UniversityXi’an 710127China Guangdong Key Laboratory of Nanomedicine CAS-HK Joint Lab of BiomaterialsCAS Key Laboratory of Biomedical Imaging Science and SystemShenzhen Engineering Laboratory of Nanomedicine and NanoformulationsCAS Key Lab for Health InformaticsShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Luminescent Materials and Devices Key Laboratory of Luminescence from Molecular Aggregates of Guangdong ProvinceSouth China University of TechnologyGuangzhou 510640China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen 518172China

Despite the rapid development of probes for targeting single organelle, the construction of robust dual-organelle targeting probes with multicolor emission was rarely reported. Herein, two dual-emissive aggregation-induced emission luminogens(AIEgens)with donor-π-acceptor structures were designed and synthesized, namely QT-1 and QF-2. Both two AIEgens exhibited excitation wavelength-dependence defying the Kasha's rule, and could stain lipid droplets(LDs) and mitochondria in blue and red fluorescence, respectively. Moreover, thanks to the near-infrared emission and abundant reactive oxygen species(ROS) generation efficiency of QT-1, it was chosen as a photodynamic therapy agent to selectively kill cancer cells from normal cells. Upon light irradiation, an obvious decrease of mitochondrial membrane potential(MMP) and serious change of mitochondrial shape in cells were observed, which corresponded to the efficient inhibition of tumor growth in vivo. This work afforded a promising strategy for the construction of multicolor emission by tuning anti-Kasha behaviors and expanding their application in dualorganelle targeting-based phototheranostics.

关键词： aggregation-induced emission anti-Kasha luminescence fluorescent probe bioimaging photodynamic therapy

Triterpenoid saponins from the roots of Clematis argentilucida

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Triterpenoid saponins from the roots of Clematis argentiluci...