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Efficacy of phospholipid complex of flavonoids from persimmon leaves on atherosclerosis, and possible mechanism

Journal of Traditional Chinese Medicine 2022年第3期42卷 417-425页

作者： CHEN Jinpeng zhang kexia LIU Yi JIN Song GAI Xiaohong REN Tao TIAN Chengwang State Key Laboratory of Drug Delivery and Pharmacokinetics Tianjin 300301China Tianjin Key Laboratory of TCM quality markers Tianjin 300301China Tianjin Institute of Pharmaceutical Research Tianjin 300301China Tianjin Pharmaceutial Research Institute Co.Ltd. Tianjin 300462China Sinopharm Group Tianjin Co.Ltd. Tianjin 300040China

OBJECTIVE:To investigate the efficacy of phospholipid complex of flavonoids from persimmon leaves(PLF-PC)on atherosclerosis,and to study its mechanism behind the ***:To clarify the constituents of the flavonoids from persimmon leaves(PLF),an ultra-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry method was *** enhance the anti-atherosclerotic effect of PLF,a newly emerging approach based on the combination of phospholipid complexation technique was ***-PC was prepared by the solvent-evaporation method then characterized using Fourier transform infrared spectroscopy,Powder X-Ray Diffractometry and Scanning electron microscopy.A model of oxidized lowdensity lipoprotein-induced injury on human umbilical vein endothelial cells was established to investigate the anti-atherosclerotic effect of PLF-PC versus *** levels of nitric oxide,endothelial nitric oxide synthase,intracellular adhesion molecule-1,reactive oxygen species,superoxide dismutase,tumor necrosis factor-αand nuclear factor-κB were observed via assay ***:A total of 31 compounds were identified in ***-PC showed better anti-atherosclerotic power compared with PLF,moreover,enzyme linked immuneosorbent assay analysis showed that the PLF-PC may effect on endothelial dysfunction and atherosclerosis via antioxidant-related ***:Our findings elucidated that PLF-PC significantly enhanced the PLF’s efficacy on atherosclerosis.

关键词： flavonoids chromatography,high pressure liquid mass spectrometry phospholipids lipoproteins,LDL endothelial cells

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基于航空遥感技术的地形信息测量方法

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中国高新科技 2023年第19期 77-78,110页

作者：张珂霞山东省临沂市自然资源和规划局山东临沂276000

目前传统的数字化地形信息测量方法通过对地形进行建模,实现地形数据的获取,由于建模数据无法反映测量地形的真实情况,导致测量误差较大。对此,提出基于航空遥感技术的地形信息测量方法,通过采用遥感技术,对飞行计划进行制定,利用搭载... 详细信息

目前传统的数字化地形信息测量方法通过对地形进行建模,实现地形数据的获取,由于建模数据无法反映测量地形的真实情况,导致测量误差较大。对此,提出基于航空遥感技术的地形信息测量方法,通过采用遥感技术,对飞行计划进行制定,利用搭载着传感器的飞机对地形影像进行直接获取,由此缩小测量误差。在实验中,对构建出的地形信息测量方法进行了测量精度的验证,经实验分析证明,利用提出的地形信息测量方法对不同地形进行测量,其测量误差值较小,具备较高的测量精度。

关键词：航空遥感技术地形信息测量法测量误差

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基于点云数据的地籍测量信息提取方法

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中国高新科技 2023年第15期 20-22页

作者：张珂霞山东省临沂市自然资源和规划局山东临沂276000

目前传统的数字化地籍测量信息提取方法通过对地籍信息进行编码,实现对地籍信息的提取。由于缺乏对主要特征数据的提取,导致提取效率较低。对此,文章提出基于点云数据的地籍测量信息提取方法。利用三维扫描仪扫描地籍信息,获取点云数据... 详细信息

目前传统的数字化地籍测量信息提取方法通过对地籍信息进行编码,实现对地籍信息的提取。由于缺乏对主要特征数据的提取,导致提取效率较低。对此,文章提出基于点云数据的地籍测量信息提取方法。利用三维扫描仪扫描地籍信息,获取点云数据,提取出双阈值点云特征数据。对点云数据进行降噪拼接处理,得到完整的地籍测量信息。在实验中,对构建出的地籍测量信息提取方法进行了提取效率的验证。经实验分析证明,利用提出的地籍测量信息提取方法对不同地籍模型进行信息提取,其耗费的提取时间较短,具备较高的提取效率。

关键词：航空遥感技术地形信息测量法测量误差

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轨道交通枢纽综合体步行节点可识别性设计探讨

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建筑与文化 2017年第5期 206-207页

作者：张克霞郭锦龙北京建筑大学建筑与城市规划学院

随着轨道交通枢纽内部各种城市功能增加,其步行流线逐渐复杂,步行中需要增强空间可识别性来加强人流引导,从而提高枢纽的运行效率。节点是步行中的核心,文中针对轨道交通枢纽综合体中的步行节点,结合北京市轨道交通枢纽综合体的实地调研... 详细信息

随着轨道交通枢纽内部各种城市功能增加,其步行流线逐渐复杂,步行中需要增强空间可识别性来加强人流引导,从而提高枢纽的运行效率。节点是步行中的核心,文中针对轨道交通枢纽综合体中的步行节点,结合北京市轨道交通枢纽综合体的实地调研,从采光设计、导向性设计、文化地域性设计三个主要方面对步行节点进行可识别性设计探讨,来提高步行节点空间环境品质,为轨道交通枢纽综合体步行空间环境设计提供参考。

关键词：轨道交通枢纽综合体步行节点可识别性设计

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轨道交通枢纽综合体公共空间整合设计探讨——以北京西直门轨道交通枢纽综合体为例

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建筑与文化 2017年第6期 213-214页

作者：郭锦龙张克霞北京建筑大学建筑与城市规划学院

轨道交通枢纽综合体是以枢纽换乘为功能载体,由多种其他城市功能组合而成的建筑,其公共空间是各种换乘人流的集散点,人流复杂,空间亟需要通过整合来实现优越的换乘秩序,从而实现高品质出行。文中以西直门轨道交通枢纽综合体为实例,从功... 详细信息

轨道交通枢纽综合体是以枢纽换乘为功能载体,由多种其他城市功能组合而成的建筑,其公共空间是各种换乘人流的集散点,人流复杂,空间亟需要通过整合来实现优越的换乘秩序,从而实现高品质出行。文中以西直门轨道交通枢纽综合体为实例,从功能、交通及空间形态三个方面来对其主要的公共空间进行整合设计探讨,从而使轨道交通枢纽综合体有序高效地发展。

关键词：轨道交通枢纽综合体公共空间整合

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Diatomic Pd catalyst with conjugated backbone for synergistic electrochemical CO_(2)reduction

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Nano Research 2024年第6期17卷 4850-4855页

作者： Wenxuan zhang Mengran zhang Hongjuan Wang Wen zhang Min zhang MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

Double-site catalysts have attracted widespread attention in the field of electrocatalysis due to their high metal loading,adjustable active centres,and electronic valence ***,the development of bimetallic sites catalysts that coordinate with definite atoms is still in the exploratory ***,we designed and synthesized a bimetallic palladium complex(BPB-Pd_(2))with conjugated *** supported BPB-Pd_(2)was applied to electrochemical CO_(2)reduction reaction(CO_(2)RR)for the first *** as-obtained BPB-Pd_(2)gives an exceptional Faradaic efficiency of CO(FECO)of 94.4%at−0.80 V *** hydrogen electrode(RHE),which is significantly superior to monoatomic palladium catalyst(BPB-Pd1).The density functional theory(DFT)calculations revealed that the essential reason for the outstanding activity of BPB-Pd_(2)toward CO_(2)RR was that the electronic effect between diatomic palladium reduces the free energy change for CO_(2)RR ***,BPB-Pd_(2)exhibits moderate free energy change to form COOH*intermediate,which was beneficial for the generation of CO in CO_(2)RR.

关键词： synthesis electrocatalysis CO_(2)reduction bimetallic palladium complex synergistic catalysis

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N-doped graphene quantum dot-decorated N-TiO2/P-doped porous hollow g-C_(3)N_(4) nanotube composite photocatalysts for antibiotic photodegradation and H2 production

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jingshu Yuan Yao zhang Xiaoyan zhang Junjie zhang Shen’gen zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi University Xi’an 710105China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao SAR 820000China

Exclusive responsiveness to ultraviolet light (~3.2 eV) and high photogenerated charge recombination rate are the two primary drawbacks of pure TiO_(2). We combined N-doped graphene quantum dots (N-GQDs), morphology regulation, and heterojunction construction strategies to synthesize N-GQD/N-doped TiO_(2)/P-doped porous hollow g-C_(3)N_(4) nanotube (PCN) composite photocatalysts (denoted as G-TPCN). The optimal sample (G-TPCN doped with 0.1wt% N-GQD, denoted as 0.1% G-TPCN) exhibits significantly enhanced photoabsorption, which is attributed to the change in bandgap caused by elemental doping (P and N), the improved light-harvesting resulting from the tube structure, and the upconversion effect of N-GQDs. In addition, the internal charge separation and transfer capability of0.1% G-TPCN are dramatically boosted, and its carrier concentration is 3.7, 2.3, and 1.9 times that of N-TiO_(2), PCN, and N-TiO_(2)/PCN(TPCN-1), respectively. This phenomenon is attributed to the formation of Z-scheme heterojunction between N-TiO_(2) and PCNs, the excellent electron conduction ability of N-GQDs, and the short transfer distance caused by the porous nanotube structure. Compared with those of N-TiO_(2), PCNs, and TPCN-1, the H2 production activity of 0.1%G-TPCN under visible light is enhanced by 12.4, 2.3, and 1.4times, respectively, and its ciprofloxacin (CIP) degradation rate is increased by 7.9, 5.7, and 2.9 times, respectively. The optimized performance benefits from excellent photoresponsiveness and improved carrier separation and migration efficiencies. Finally, the photocatalytic mechanism of 0.1% G-TPCN and five possible degradation pathways of CIP are proposed. This study clarifies the mechanism of multiple modification strategies to synergistically improve the photocatalytic performance of 0.1% G-TPCN and provides a potential strategy for rationally designing novel photocatalysts for environmental remediation and solar energy conversion.

关键词： N-doped TiO_(2) N-doped graphene quantum dots P-doped g-C_(3)N_(4) porous hollow nanotube heterojunction photocatalysis

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Reversing free-electron transfer of sulfide cocatalyst for exceptional photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第4期171卷 147-149页

作者： Yanfeng zhang Zhenyi zhang National Experimental Chemistry Teaching Center Hebei Key Laboratory of Inorganic Nano-materialsCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600China

Recently,Yu and co-workers deeply explore the potential impact of free electron transfer between co-catalysts and photocatalyst carriers on H_(2)evolution efficiency of active sites over MoS_(2+x).They pro-pose an electron-reversal tactics to evade the unexpected electron transfer and synchronously regulate the above transfer in a beneficial orientation for weakening hydrogen adsorption on S ***,this highlight not only discusses and summarizes the essences of electron reversal and the optimized H ad-sorption/desorption mechanism,but also emphasizes the significance of femtosecond transient absorp-tion spectroscopy(fs-TAS)and in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)for revealing charge transfer dynamics and *** anticipate that this highlight can disseminate a new per-spective on the roles of photocatalyst carriers in improving cocatalytic H_(2)-production kinetics.

关键词： Photocatalysis Cocatalyst Electron reversal Antibonding-orbital occupancy S–H bonds

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Friction as energy dissipation process associated with superlubricity of solids

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Friction 2024年第9期12卷 2083-2088页

作者： Bo zhang Saga University Saga-shi 840-8502Japan

The paper shows that work in a quantum system is quantized with energy;the quantum work is equivalent to the highest eigenenergy(the Debye energy)of the system and the superlubricity of solids is derived from the quantum *** prerequisite for the superlubricity is that the lateral force at contact surfaces in sliding is less than the Debye force so that the phonon of the solids is not excited.

关键词： superlubricity phonon friction Plank law Debye frequency

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Inter-well internal resonance analysis of rectangular asymmetric cross-ply bistable composite laminated cantilever shell under transverse foundation excitation

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1353-1370页

作者： Lele REN Wei zhang Yufei zhang State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Department of Mechanics Guangxi UniversityNanning 530004China Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures College of Mechanical EngineeringBeijing University of TechnologyBeijing 100124China

The chaotic dynamic snap-through and complex nonlinear vibrations are investigated in a rectangular asymmetric cross-ply bistable composite laminated cantilever shell,in cases of 1:2 inter-well internal resonance and primary *** transverse foundation excitation is applied to the fixed end of the structure,and the other end is in a free *** first-order approximate multiple scales method is employed to perform the perturbation analysis on the dimensionless two-degree-of-freedom ordinary differential motion control *** four-dimensional averaged equations are derived in both polar and rectangular coordinate *** from the obtained frequency-amplitude and force-amplitude response curves,a detailed analysis is conducted to examine the impacts of excitation amplitude,damping coefficient,and tuning parameter on the nonlinear internal resonance characteristics of the *** nonlinear softening characteristic is exhibited in the upper stable-state,while the lower stable-state demonstrates the softening and linearity *** simulation is carried out using the fourth-order Runge-Kutta method,and a series of nonlinear response curves are *** the excitation amplitude further elucidates the global bifurcation and chaotic dynamic snap-through characteristics of the bistable cantilever shell.

关键词： bistable composite laminated cantilever shell inter-well internal resonance primary resonance chaotic dynamic snap-through complex nonlinear vibration

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