检索结果-南通市图书馆

Integrating lipidomics and gut microbiota to study the anti-hyperlipidemia effect of Sargentodoxae Caulis extract

在线全文

学校读者我要写书评

暂无评论

Traditional Medicine Research 2025年第1期10卷 1-11页

作者： Xiao-Xiao Zhang Li Jia Xiu-jun Zhan Charity Ngina Qing-Rui Zhang Xiao-Ge Li Qi-Bao Jiang shi Bai Miao-Miao Jiang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China School of Medicine Taizhou UniversityTaizhou 318000China.

Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&*** in ***,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical ***,the anti-hyperlipidemia effect of SC is not fully *** paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating ***:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut ***,we explored the potential mechanism of SC in treating hyperlipidemia by pathway ***:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to *** to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s *** also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically ***-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the *** was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and *** treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,*** these,14 common differenti

关键词： hyperlipidemia Sargentodoxae Caulis lipidomics intestinal flora

Terahertz Direct Detection Characteristics of a Superconducting NbN Bolometer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第1期28卷 50-53页

作者： REN Yuan MIAO Wei YAO Qi-jun ZHANG Wen shi sheng-Cai Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 Graduate School of the Chinese Academy of Sciences Beijing 100049

We report the terahertz direct detection characteristics of a spiral antenna coupled NbN superconducting hot- electron bolometer （HEB） at a bath temperature of 4.2K. Thermal conductance determined from resistance transition curves with different bias currents is found to be 3 × 10 7 W/K. The device shows a read-out circuit limited noise equivalent power （NEP） of 4.5 × 10-12 W/Hz/2 at 4.2 K with a home-made transimpedance amplifier operating at room temperature.

关键词： Superconductivity Instrumentation and measurement

Corrosion Behavior of the S136 Mold Steel Fabricated by Selective Laser Melting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2018年第6期31卷 68-78页

作者： shi-Feng Wen Xian-Tai Ji Yan Zhou Chang-jun Han Qing-Song Wei Yu-sheng shi State Key Laboratory of Materials Processing and Die & Mold Technology School of Materials Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Faculty of Engineering China University of Geosciences Wuhan 430074 China

The selective laser melting(SLM) method has a great potential for fabricating injection mold with complex structure. However, the microstructure and performance of the SLM molds show significantly di erent from those manufac?tured by traditional technologies. In this study, the microstructure, hardness and especially corrosion behavior of the samples fabricated by SLM and casting were investigated. The XRD results exhibit that the γ?Fe phase is only obtained in the SLM parts, and the α?Fe peak slightly moves to low di raction angle compared with casting counterparts. Due to the rapid cooling rate, the SLM samples have fine cellular microstructures while the casting ones have coarse grains with obvious elements segregation. Besides, the SLM samples show anisotropy, hardness of side view and top view are 48.73 and 50.31 HRC respectively, which are 20% higher than that of casting ones. Corrosion results show that the SLM samples have the better anti?corrosion resistance(in a 6% FeCl3 solution for 48 h) but the deeper corrosion pits than casting ones. Finally, the performance of the SLM molds could meet the requirement of injecting production. Moreover, the molds especially present a significant decrease(20%) of cooling time and increases of cooling uniform?ity due to the customized conformal cooling channels.

关键词： Selective laser melting S136 mold steel Corrosion behavior Conformal?cooling channels

Oxidation performance of Fe-Al/WC composite coatings produced by high velocity arc sprayed at 800 ℃

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊:英文版 2004年第z1期14卷 425-428页

作者： MENG Fan-jun XU Bin-shi ZHU sheng MA shi-ning ZHANG Wei ZHU Zi-xin National Key Laboratory for Remanufacturing Academy of Armored Forces Engineering Beijng 100072China

Fe-Al/WC intermetallic composite coatings were prepared by high velocity arc spraying (HVAS) technology on 20G steel and the oxidation performance of Fe-Al/WC composite coatings was studied. The results demonstrate that the kinetics curve of oxidation approximately follows the logarithmic law and the oxidation velocity of Fe-Al/WC composite coatings is less than that of 20G steel after 5 h. The composition of oxidized coating is mainly composed of Al2O3, Fe2O3, Fe3O4 and FeO. These phases distribute unevenly. The protective Al2O3 film firstly forms and preserves the coatings from further oxidation.

关键词： high temperature oxidation HVAS Fe-Al intermetallic composite coating

Lightweight epoxy-based abradable seal coating with high bonding strength

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第10期69卷 129-137页

作者： Yun-Qi Tong Qiu-sheng shi Mei-jun Liu Guang-Rong Li Chang-Jiu Li Guan-jun Yang State Key Laboratory for Mechanical Behavior o f Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an710049China

To gain high efficiency and low fuel consumption, aluminum-based abradable seal coatings had been widely used in the compressor casing of aero engines or gas turbines owing to the low elastic modulus. However, the adhesive transfer phenomenon frequently occurs when the radial rubbing generates between titanium alloy blade tips and aluminum-based coating. It tends to increase scratch force and results in blades vibration and even engine jam. To eliminate this problem, a new lightweight epoxy-based abradable seal coating with high bonding strength was developed by an effective and porosity controllable mixing process that distributes spherical pores uniformly in the continuous matrix. A lightweight coating of 63% porosity with a hardness of 33.1(HR15 Y) can be reached when the content of hollow microspheres is 31 wt.%. The coating density is 0.5 g/cm3 and the bonding strength is as high as 18 *** performance of the epoxy-based coating is comprehensively better than aluminum-based coatings in five essential indices. This study is expected to provide a new technical path for obtaining high-quality abradable seal coatings to guarantee the efficient and safe operation of compressors.

关键词： Epoxy-based seal coating Porosity HR15Y Lightweight High bonding strength

Solid State NMR and Fluorescence Studies of Conjugated Polymer Nanocomposties

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第11期16卷 1519-1522页

作者： Chao jun JING Liu sheng CHEN Yi shi Xi Gao JIN State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080 Graduate School of the Chinese Academy of Sciences Beijing 100080

^13C spin-lattice relaxation times （T1） of a conjugated polymer MEH-PPV in polymer/ layered silicate nanocomposites together with the steady state fluorescence emission and transient fluorescence decay measurements have been investigated. The T1 values of the conjugated carbons decrease dramatically according to the reduction of polymer concentration in the nano composites, while the fluorescence life times （τ） show a linear prolonging tendency. The results are explained from the point of view of molecular dynamics.

关键词： Conjugated polymer nanocomposites fluorescence solid state ^13C NMR

The Finite-time Ruin Probability of a Discrete-time Risk Model with Subexponential and Dependent Insurance and Financial Risks

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2018年第3期34卷 553-565页

作者： shi-jie WANG Chuan-wei ZHANG Xue-jun WANG Wen-sheng WANG School of Mathematic Sciences Anhui University Hefei 230601 China School of Economics Hangzhou Dianzi University Hangzhou 310018 China

Consider a discrete-time risk model with insurance and financial risks in a stochastic economic environment. Assume that the insurance and financial risks form a sequence of independent and identically distributed random vectors with a generic random vector following a wide type of dependence structure. An asymptotic formula for the finite-time ruin probability with subexponential insurance risks is derived. In doing so, the subexponentiality of the product of two dependent random variables is investigated simultaneously.

关键词： discrete-time risk model finite-time ruin probability subexponentiality product dependence structure

Synthesis of Exfoliated MEH-PPV /Clay Nanocomposites

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第8期16卷 1117-1120页

The synthesis of poly（2-methoxy-5-（2＇-ethyl-hexyloxy）-l,4-phenylenevinylene）（MEH-PPV） in the presence of organophilic montmorillonite （OMMT） was reported and the exfoliated MEH-PPV/OMMT nanocomposites was ob... 详细信息

关键词： MEH-PPV nanocomposite in-situ polymerization.

Stability of Disclinations in Nematic Liquid Crystals

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第6期45卷 993-999页

作者： WANG Yu-sheng YANG Guo-Hong TIAN Li-jun DUAN Yi-shi Department of Physics Shanghai University Shanghai 200444 China Department of Mathematics and Information Sciences North China Institute of Water Conservancy and Hydroelectric Power Zhengzhou 450008 China Institute of Theoretical Physics Lanzhou University Lanzhou 730000 China

In the light of C-mapping method and topological current theory, the stability of disclinations around a spherical particle in nematic liquid crystals is studied. We consider two different defect structures around a spherical particle： disclination ring and point defect at the north or south pole of the particle. We calculate the free energy of these different defects in the elastic theory. It is pointed out that the total Frank free energy density can be divided into two parts. One is the distorted energy density of director field around the disclinations. The other is the free energy density of disclinations themselves, which is shown to be concentrated at the defect and to be topologically quantized in the unit of （k - k24）π/2. It is shown that in the presence of saddle-splay elasticity a dipole （radial and hyperbolic hedgehog） configuration that accompanies a particle with strong homeotropic anchoring takes the structure of a small disclination ring, not a point defect.

关键词： director field topological defect free energy bifurcation