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Two new furostanol saponins from Tribulus terrestris L.

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Chinese Chemical Letters 2010年第5期21卷 580-583页

作者： Ya Juan xu Tun Hai xu Jun Ying Yang sheng xu xie Yue Liu Yun Shan Si Dong Ming xu Academy of Traditional Chinese Medicine and Material Medica of Jilin Province Changchun 130021China Tianjin University of Traditional Chinese Medicine Tianjin 300193China School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100102China

Two new furostanol glycoside,26-O-β-D-glucopyranosyl-(25S)-5α-furost-3β,22α,26-triol-3-O-β-D-rhamnopyranosyl-(1→2)-[β-D-glucopyranosyl-(1→4)]-β-D-galactopyranoside(1) and 26-O-β-D-glucopyranosyl-(25S)-5α-furost-20(22)-en-2α,3β,26-triol-3-O-β-D-glucopyranosyl-(1→2)-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside(2) were isolated fromthe fruits of Tribulus terrestris *** structures of two new furostanol saponins were elucidated by spectroscopic methods.

关键词： Tribulus terrestris L. Furostanol saponin Zygophyllaceae

Two new steroidal glucosides from Ophiopogon japonicus (L.f.) Ker-Gawl

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Chinese Chemical Letters 2008年第7期19卷 825-828页

作者： Ya Jiuan xu Tun Hai xu Ling Zhu Hao Hong Feng Zhao sheng xu xie Yun Shan Si Dong Han Dong Ming xu Academy of Traditional Chinese Medicine and Material Medica of Jilin Province Changchun 130021China School of Traditional Chinese Medicine Beijing University of Chinese Medicine Beijing 100102China School of Traditional Chinese Medicine Xinjiang University of Medicine Urumchi 830011 China

Two new steroidal glucosides, 26-O-β-D-glucopyranosyl （25S）-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- （1 → 3）-[α-h-rhamnopyranosyl-（1 → 2）]-[β-D-fueopyranoside and （25R） spirost-5-ene-3β,14α-diol-3-β-O-β-L-rhanmopyranosyl- （1 → 2）-[β-D-xylopyranosyl（1 → 4）]-[-β-D-glucopyranoside, were isolated from the Ophiopogon japonicus （L.f.） Ker-Gaw. Their structures were elucidated by spectroscopic methods.

关键词： Ophiopogon japonicus (L.f.) Ker-Gawl Steroidal glucosides Liliaceae

A new glycoside from Polygala tenuifolia Willd

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Chinese Chemical Letters 2008年第7期19卷 817-820页

作者： Tun Hai xu Gang Lv Tong Hua Liu Ya Juan xu Yun Shan Si sheng xu xie Hong Feng Zhao Dong Han Dong Ming xu School of Traditional Chinese Medicine Beijing University of Chinese Medicine Beijing 100102 China Academy of Traditional Chinese Medicine and Material Medica of Jilin Province Changchun 130021 China School of Traditional Chinese Medicine Xinjiang University of Medicine Urumchi 830054 China

A new tdterpenoid glycoside, 3-β-O-β-D-glucopyranosyl presenegenin 28-O-α-L-arabipyranosyl（1 → 3）-6-β- xylopyranosyl（1 → 4）-[β-D-apiofuranosyl（1 → 3）]-Ct-L-rhamnopyranosyl（1 → 2）-[α-L-rhamnopyranosyl（1 → 3）]-β-D-fucopyranosyl ester （1） was isolated from the Polygala tenuifolia Willd., together with two known saponins, including polygalasaponinXXIV （2） and polygalasaponinXXVIII （3）. The structure of new compound was elucidated by spectroscopic methods.

关键词： Polygala tenuifolia Willd. Triterpenoid saponin Polygalaceae

Superhydrophobic and corrosion-resistant siloxane-modified MgAl-LDHs coatings on magnesium alloy prepared under mild conditions

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 450-463页

作者： Wenxi Zhang Zhangzelong Zhuo Dan xu Liang Wu Zhihui xie Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

We have developed a superhydrophobic and corrosion-resistant LDH-W/PFDTMS composite coating on the surface of Mg *** composite comprised a tungstate-intercalated(LDH-W)underlayer that was grown at low temperature(relative to hydrothermal reaction conditions)under atmospheric pressure and an outer polysiloxane layer created from a solution containing perfluorodecyltrimethoxysilane(PFDTMS)using a simple immersion *** successful intercalation of tungstate into the LDH phase and the following formation of the polysiloxane layer were confirmed through X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,and X-ray photoelectron spectroscopy(XPS).The corrosion resistance of the LDH-W film,both before and after the PFDTMS modification,was evaluated using electrochemical impedance spectroscopy(EIS),Tafel curves,and immersion *** results showed that Mg coated with LDH-W/PFDTMS exhibited significantly enhanced corrosion protection compared to the unmodified LDHW film,with no apparent signs of corrosion after exposure to 3.5wt%NaCl solution for 15 ***,the LDH-W/PFDTMS coating demonstrated superior superhydrophobicity and self-cleaning properties against water and several common beverages,as confirmed by static contact angle and water-repellency *** results offer valuable insights into preparing superhydrophobic and corrosion-resistant LDH-based composite coatings on Mg alloy surfaces under relatively mild reaction conditions.

关键词： Mg alloy corrosion coating layered double hydroxide

Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen xie Liu Changqing xu Da-Jian Wu Ying Cheng Xiao-Jun Liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

Integration of perioperative features and intragraft TCF7L2 expression to predict lipid metabolic disorder in liver transplant recipients

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Science China Life Sciences 2025年第1期68卷 297-299页

作者： Junbin Zhou Rongli Wei Guanghan Fan Zhengxing Lian xuanyu Zhang Linsong Tang Zhetuo Qi Haiyang xie Shusen Zheng Qiang Wei Xiao xu Department of Hepatobiliary and Pancreatic Surgery People's Hospital of LishuiAffiliated Lishui Hospital of Wenzhou Medical UniversityThe First Affiliated Hospital of Lishui University NHFPC Key Laboratory of Combined Multi-Organ Transplantation Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province Department of Hepatobiliary and Pancreatic SurgeryHangzhou First People's Hospital Department of Hepatobiliary and Pancreatic Surgery The First Affiliated HospitalZhejiang University School of Medicine Department of Urology The Second Affiliated HospitalZhejiang University School of Medicine Department of Hepatobiliary and Pancreatic Surgery Department of Liver TransplantationShulan (Hangzhou) Hospital Hangzhou Medical College Zhejiang University School of Medicine

Dear Editor, Liver transplantation(LT) is the only curative therapy for patients with endstage liver disease(He et al., 2023; Ling et al., 2022). Post-transplant hypertriglyceridemia(PTHT), which has an incidence of up to 32.8% in 6 months after LT, is one of the major post-transplant complications(Toshima et al., 2020).

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介孔SBA-16负载毒死蜱载药微球的制备及其表征

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化工新型材料 2016年第12期44卷 144-146页

作者：林粤顺周红军周新华龚圣徐华谢慧琳胡文斌仲恺农业工程学院化学化工学院广州510225

以三嵌段共聚物F127(分子式为(EO)_(106)(PO)_(70)(EO)_(106))为模板剂,正硅酸乙酯为硅源,水热合成法制备介孔二氧化硅SBA-16,采用浸渍法将毒死蜱负载于SBA-16制得毒死蜱/SBA-16载药微球,通过FT-IR、XRD、氮气吸附-脱附、TG、DSC等手段... 详细信息

以三嵌段共聚物F127(分子式为(EO)_(106)(PO)_(70)(EO)_(106))为模板剂,正硅酸乙酯为硅源,水热合成法制备介孔二氧化硅SBA-16,采用浸渍法将毒死蜱负载于SBA-16制得毒死蜱/SBA-16载药微球,通过FT-IR、XRD、氮气吸附-脱附、TG、DSC等手段对样品进行了表征,并探究了负载毒死蜱前后SBA-16的结构及其载药量。研究结果表明,毒死蜱以非结晶态均匀负载于SBA-16孔道中;SBA-16和毒死蜱/SBA-16载药微球的N2吸附-脱附等温线仍为H1型滞后环的Ⅵ型,且具有良好的有序介孔结构;该载药微球中负载毒死蜱的质量分数为7.6%。

关键词： SBA-16 介孔硅毒死蜱微球

A non-contact spacecraft architecture with extended stochastic state observer based control for gravity mission

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Journal of Systems Engineering and Electronics 2021年第2期32卷 460-472页

作者： LIU sheng LIAO He xie Jinjin xu Yufei xu Yi TANG Zhongxin YAO Chuang School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China School of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China Research Center Shanghai Institute of Satellite EngineeringShanghai 201109China

A novel non-contact spacecraft architecture with the extended stochastic state observer for disturbance rejection control of the gravity satellite is ***,the precise linear driving non-contact voice-coil actuators are used to separate the whole spacecraft into the non-contact payload module and the service module,and to build an ideal loop with precise dynamics for disturbance rejection control of the payload ***,an extended stochastic state observer is enveloped to construct the overall nonlinear external terms and the internal coupled terms of the payload module,enabling the controller design of the payload module turned into the linear form with simple bandwidth-parameterization tuning in the frequency *** a result,the disturbance rejection control of the payload module can be explicitly achieved in a timely manner without complicated tuning in actual ***,an extensive numerical simulation is conducted to validate the feasibility and effectiveness of the proposed approach.

关键词： non-contact spacecraft architecture extended stochastic state observer disturbance rejection control non-contact voice-coil actuators bandwidth-parameterization tuning

Towards designing high mechanical performance low-alloyed wrought magnesium alloys via grain boundary segregation strategy:A review

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Journal of Magnesium and Alloys 2024年第5期12卷 1774-1791页

作者： Zhi Zhang Jinshu xie Jinghuai Zhang xu-sheng Yang Ruizhi Wu Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Ultra-Precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518060China

Low-alloyed magnesium(Mg)alloys have emerged as one of the most promising candidates for lightweight ***,their further application potential has been hampered by limitations such as low strength,poor plasticity at room temperature,and unsatisfactory *** address these challenges,grain refinement and grain structure control have been identified as crucial factors to achieving high performance in low-alloyed Mg *** effective way for regulating grain structure is through grain boundary(GB)*** review presents a comprehensive summary of the distribution criteria of segregated atoms and the effects of solute segregation on grain size and growth in Mg *** analysis encompasses both single element segregation and multi-element co-segregation behavior,considering coherent interfaces and incoherent ***,we introduce the high mechanical performance low-alloyed wrought Mg alloys that utilize GB segregation and analyze the potential impact mechanisms through which GB segregation influences materials *** upon these studies,we propose strategies for the design of high mechanical performance Mg alloys with desirable properties,including high strength,excellent ductility,and good formability,achieved through the implementation of GB *** findings of this review contribute to advancing the understanding of grain boundary engineering in Mg alloys and provide valuable insights for future alloy design and optimization.

关键词： Magnesium alloys Grain boundary segregation High strength High plasticity High formability