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The Adsorption Effect of Quaternized Chitosan Derivatives on Bile Acid

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Chinese Chemical Letters 2006年第7期17卷 981-984页

作者： Shu Xian MENG Ya Qing FENG Wen jin LI Cai Xia YIN jin ping deng School of Chemical Engineering and Technology Tianjin University Tianjin 300072

Three quatemized chitosan derivatives were synthesized and their adsorption performance of bile acid from aqueous solution was studied. The adsorption capacities and rates of bile acid onto quatemized chitosan derivatives were evaluated. The kinetic experimental data properly correlated with the second-order kinetic model, which indicated that the chemical sorption is the rate-limiting step. The results showed that the quatemized chitosan derivatives are favorable adsorbents for bile acid.

关键词： Chitosan quaternized chitosan derivative bile acid adsorption.

Distinct MLT asymmetry of auroral kilometric radiation observed by the FAST satellite

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Earth and Planetary Physics 2025年第1期9卷 188-193页

作者： JiaWen Tang Sai Zhang FuLiang Xiao HongMing Yang Si Liu YiHua He Chang Yang YuYue jin ZhouKun deng ping Li Archie James Johnston School of Physics and Electronic Sciences Changsha University of Science and TechnologyChangsha 410114China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments Changsha University of Science and TechnologyChangsha 410114China School of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China

Auroral Kilometric Radiation (AKR) is a common radio emission,which can contribute to the magnetosphere-ionosphereatmosphere co u *** emissions have been observed in all magnetic planet magnetospheres of the solar *** this study,using observations from the FAST satellite from 30 August 1996 to 9 September 2001,the distribution of AKR in altitude=500-4500 km and invariant latitude (|ILAT|)=60°-80°has been analyzed.63045 AKR samples have been identified with~48%(52%) samples on the dayside (nightside).Of considerable interest,there is a distinct MLT asymmetry with the high occurrence rate in MLT=05-08 and 18-22(02-05 and 12-17) in the northern (southern) *** distinct MLT asymmetry is associated with the direction of Bxof the interplaneta ry magnetic *** addition,the occurrence rate on the nightside clearly increases as the AE^(*) index *** study further enriches the information and understanding of AKR in the magnetosphere as well as other similar radio emissions.

关键词： asymmetry auroral kilometric radiation interplanetary magnetic field

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北斗卫星单系统精密定轨方法对比分析

天文学报 2016年第5期57卷 534-543页

作者：刘伟平郝金明邓科陈逸伦信息工程大学导航与空天目标工程学院郑州450001 北斗导航应用技术河南省协同创新中心郑州450001

提出了联合使用载波相位和相位平滑伪距实现北斗卫星双差动力法精密定轨,给出了北斗卫星非差动力法和双差动力法精密定轨的数据处理流程,分析了两种方法的异同.结合实测数据,对比了两种方法的实际定轨效果,结果表明:一定测站布局下,利... 详细信息

提出了联合使用载波相位和相位平滑伪距实现北斗卫星双差动力法精密定轨,给出了北斗卫星非差动力法和双差动力法精密定轨的数据处理流程,分析了两种方法的异同.结合实测数据,对比了两种方法的实际定轨效果,结果表明:一定测站布局下,利用两种方法,GEO(Geostationary Earth Orbit Satellite)卫星3维精密定轨精度均能达到1 m左右量级,IGSO(Inclined Geosynchronous Earth Orbit Satellite)和MEO(Medium Earth Orbit Satellite)卫星优于0.5 m,3类卫星的径向定轨精度均优于10 cm.较之非差动力法,双差动力法对GEO卫星精密定轨精度具有一定的改善作用,两者在IGSO卫星精密定轨上效果基本相当,但在MEO卫星定轨上,非差动力法结果更优.

关键词：天体力学航天器方法数据分析

Self-Assembling Nanotubes Based on γ-Cyclopeptides

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Self-Assembling Nanotubes Based on γ-Cyclopeptides

Synthesis of Novel Disulfide γ-Cyclopeptides

中国化学会第四届有机化学学术会议

作者： YANG, Yu-jin HU, Yu Zhu, Jian-ping ZHU, jin deng, jin-Gen Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Union Laboratory of Asymmetric Synthesis, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041. Graduate School of Chinese Academy of Sciences, Beijing

＜正＞Design of self-assembling hollow tubular structures has been the subject of considerable research lately. The organic tubular structures of molecular dimensions may offer a variety of potential applications in chemistry, biochemistry and materials science. Specifically, self-assembling nanotubes have been designed based on cyclopeptides of alternating D,L- α -amino acids, β-amino acids, alternating α,β-amino acids, alternating α, γ-amino acids and δ -amino acids. Here we present the self-assemble of a disulfide-cyclized γ-peptide 1. 1H NMR study in solu-

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Synthesis of Novel Disulfide γ-Cyclopeptides

Metastable seed-crystals: epitaxial growth of branched-array organic heterostructure nanowires

中国化学会第四届有机化学学术会议

作者： YANG, Yu-jin HU, Yu Zhu, Jian-ping ZHU, jin deng, jin-Gen Key Laboratory of Asymmetric Synthesis & Chiwtechnology of Sichuan Province, Union Laboratory of Asymmetric Synthesis, Chengdu Institute of Organic Chemistry, Chin ese Academy of Sciences, Chengdu 610041. Graduate School of Chinese Academy of Sciences, Beijing

＜正＞Cyclopeptides and their derivatives continue to hold the attention of synthetic chemists and biologist alike. Besides their bioactivity, the rigid conformation that allows them to be used in the study and mimicry of protein folding and to present diverse functionality in a defined and predicable manner is another attractive feature of the cyclopeptides. Here we present the synthesis of two disulfide cyclopeptides which contain four （lR,3S）-3-aminocyclohex-

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Science China Chemistry 2025年

作者： jin Feng Zhen-Yu Geng Ting-Yao Song Ying-Xin Ma Chuan-Zeng Wang Wei Zhang Hong-Tao Lin jin Zhou Shu-ping Zhuo Shu-Hai Chen Xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of Technology Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University College of Chemistry and Chemical Engineering Hunan Normal University

Tunable light–matter interactions are exhibited by organic low-dimensional crystals, making these crystals a promising platform for organic photonics. However, the precise synthesis of organic low-dimensional crystals remains challenging due to the stochastic nature of molecular nucleation processes. Herein, the directed nucleation process is driven by the introduction of metastable seed-crystals as the trunk, which ultimately leads to branched-array organic heterostructures. The successful formation of organic heterostructures with high-density branched arrays is attributed to the highest attachment energy (Eatt（023）=-104.25 kcal mol-1) of the exposed （023） crystal plane during the seed-crystal growth route. Significantly, these as-prepared heterostructures inherently have an ultralow lattice mismatch ratio η of 0.7%between trunk and branch, which contributes to the multi-channel photon transportation. Therefore, this work provides valuable insights into a versatile synthetic strategy for accessing low-dimensional heterostructures for integrated optoelectronics.

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Study on Wusan Granule Anti-tumor Related Target Gene Screened by cDNA Microarray

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Study on Wusan Granule Anti-tumor Related Target Gene Screen...

中国蛋白质组学第二届学术大会

作者： You Zi-li, Shi jin-ping, deng Ke-jun, Huang Jian, Zang Zhi-he (School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 610054 The Department of Pharmacology, Chengdu Military Medical Institute. Third Military Medical University, Chengdu, 610083)

to screen Wusan Granule anti-tumor related target gene using cDNA microarray technique. Methods: Both mRNA from Lewis lung carcinoma tissues treated by Wusan Granule and untreated control were reversibly transcribed to prepare cDNA probes, labeled by Cy5 and ***, the probes were hybridized to the mice cDNA microarray of type MGEC-20S. After hybridization, the cDNA microarray was scanned by ScanArray 3000 scanner and analyzed by ImaGene 3 software to screen the differentially expressed genes.

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粉末高速压制成形二维流动的元胞自动机模拟

系统仿真学报 2009年第21期21卷 6825-6828页

作者：郑洲顺于万春子诸葛金平梁登三璞玉罗娟中南大学数学科学与计算技术学院长沙410083

根据粉末高速压制成形和元胞自动机在时间与空间上均离散的特点,分析能量分布与粉末颗粒的水平迁移与垂直迁移规律,建立粉末高速压制成形过程的元胞自动机模型。将高速压制粉末颗粒的迁移规则用矩阵表示,给出基于元胞自动机的高速压制... 详细信息

根据粉末高速压制成形和元胞自动机在时间与空间上均离散的特点,分析能量分布与粉末颗粒的水平迁移与垂直迁移规律,建立粉末高速压制成形过程的元胞自动机模型。将高速压制粉末颗粒的迁移规则用矩阵表示,给出基于元胞自动机的高速压制成形粉末迁移过程模拟的算法。利用Matlab软件实现对高速压制成形粉末流动过程的模拟,得到高速压制粉末致密化过程的演化图和密度分布的变化过程。数值模拟的最终密度分布与实验研究的结果较吻合。

关键词：元胞自动机粉末高速压制成形数值模拟动态仿真

Bifurcations and Chaos in Duffng Equation with Damping and External Excitations

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Acta Mathematicae Applicatae Sinica 2014年第2期30卷 483-504页

作者： Mei-xiang CAI Jian-ping YANG jin deng Institute of Mathematics and Physics Central South University of Forestry and Technology College of Science China Agriculture University Department of Mathematics and Physics Hunan Institute of Engineering

Duffing equation with damping and external excitations is investigated. By using Melnikov method and bifurcation theory, the criterions of existence of chaos under periodic perturbations are obtained. By using second-order averaging method, the criterions of existence of chaos in averaged system under quasi-periodic perturbations for Ω = nω ＋ εσ, n = 2,4,6 （where σ is not rational to ω） are investigated. However, the criterions of existence of chaos for n = 1, 3, 5, 7 - 20 can not be given. The numerical simulations verify the theoretical analysis, show the occurrence of chaos in the averaged system and original system under quasi- periodic perturbation for n = 1, 2, 3, 5, and expose some new complex dynamical behaviors which can not be given by theoretical analysis. In particular, the dynamical behaviors under quasi-periodic perturbations are different from that under periodic perturbations, and the period-doubling bifurcations to chaos has not been found under quasi-periodic perturbations.

关键词： Duffing equation Melnikov method second-order averaging method chaos