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Rhizosphere microbial markers (micro-markers): A new physical examination indicator for traditional Chinese medicines

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Chinese herbal Medicines 2024年第2期16卷 180-189页

作者： Kailin Yang Yaping Zheng Kangmeng Sun Xinyan Wu Zheng Zhang chunnian he Peigen Xiao Institute of Medicinal Plant Development Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China Key Laboratory of Bioactive Substances and Resources Utilization of Chinese herbal Medicine Ministry of EducationBeijing 100193China

Rhizosphere microorganisms,as one of the most important components of the soil microbiota and plant holobiont,play a key role in the medicinal plant-soil ecosystem,which are closely related to the growth,adaptability,nutrient absorption,stress tolerance and pathogen resistance of host *** recent years,with the wide application of molecular biology and omics technologies,the outcomes of rhizosphere microorganisms on the health,biomass production and secondary metabolite biosynthesis of medicinal plants have received extensive ***,whether or to what extent rhizosphere microorganisms can contribute to the construction of the quality evaluation system of Chinese medicinal materials is still *** on the significant role of rhizosphere microbes in the survival and quality formation of medicinal plants,this paper proposed a new concept of rhizosphere microbial markers(micro-markers),expounded the relevant research methods and ideas of applying the new concept,highlighted the importance of micro-markers in the quality evaluation and control system of traditional Chinese medicines(TCMs),and introduced the potential value in soil environmental assessment,plant pest control and quality assessment of *** provides reference for developing ecological planting of TCMs and ensuring the production of high quality TCMs by regulating rhizosphere microbial communities.

关键词： physical examination indicator quality evaluation quality formation of medicinal plants rhizosphere microorganisms rhizosphere microbial markers

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川赤芍总苷及其主成分芍药苷对痤疮相关炎症的抑制作用研究

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日用化学工业（中英文） 2024年第2期54卷 188-195页

作者：刘伟兰李丽何春年董银卯凌霄郭苗苗北京工商大学北京市植物资源开发重点实验室北京100048 中国医学科学院北京协和医学院药用植物研究所北京100193 北京尚捷优蓝科技有限公司北京100081

研究了川赤芍总苷及其主成分芍药苷对痤疮相关炎症的抑制作用。通过制备并基于高效液相色谱分析川赤芍总苷主活性成分含量;建立痤疮丙酸杆菌(Cropionibacterium acnes,***)诱导THP-1细胞炎症模型;采用CCK8法检测细胞相对活力,ELISA法快... 详细信息

研究了川赤芍总苷及其主成分芍药苷对痤疮相关炎症的抑制作用。通过制备并基于高效液相色谱分析川赤芍总苷主活性成分含量;建立痤疮丙酸杆菌(Cropionibacterium acnes,***)诱导THP-1细胞炎症模型;采用CCK8法检测细胞相对活力,ELISA法快速检测细胞IL-1β、IL-8的分泌量,并用Western blot法验证。结果表明:在100μg/mL质量浓度下川赤芍根提取物能显著抑制***刺激引起的炎症因子IL-1β、IL-8(p<0.01)。从川赤芍根提取物中提取的川赤芍总苷,在相同浓度下对炎症因子IL-1β抑制率提高了20%。川赤芍总苷中芍药内酯苷、芍药苷、苯甲酰芍药苷含量分别为0.64%,26.3%,1.17%。其中芍药苷的含量最高,且对***刺激引起的炎症因子IL-1β抑制效果显著(p<0.01)。此外,芍药苷还能降低***刺激引起的活性氧和乳酸脱氢酶。综上所述,川赤芍总苷及其主成分芍药苷对改善***引起的皮肤炎症具有潜在的治疗价值。

关键词：痤疮川赤芍总苷芍药苷抗炎

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高导电高耐热铜合金及铜基复合材料的研究现状与展望

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铸造技术 2024年第1期45卷 1-26页

作者：王佳睿张翔何春年赵乃勤天津大学材料科学与工程学院天津300350

高导耐热铜基材料作为现代高新技术用关键材料之一,已被广泛应用于轨道交通、电子通信和航空航天等领域。本文从铜合金和铜基复合材料两大领域入手,介绍了常见高导耐热铜材料的设计思路、制备方法、微观组织结构、力学性能和物理性能,... 详细信息

高导耐热铜基材料作为现代高新技术用关键材料之一,已被广泛应用于轨道交通、电子通信和航空航天等领域。本文从铜合金和铜基复合材料两大领域入手,介绍了常见高导耐热铜材料的设计思路、制备方法、微观组织结构、力学性能和物理性能,并对其导电机制和高温强化机理进行了归纳和阐释,最后对高导耐热铜基材料的研究现状和未来发展进行了总结与展望。

关键词：高电导率高耐热性铜合金铜基复合材料导电机制高温强化机理

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Manipulating mechanical properties of graphene/Al composites by an in-situ synthesized hybrid reinforcement strategy

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Journal of Materials Science & Technology 2022年第28期123卷 13-25页

作者： Lizhuang Yang Bowen Pu Xiang Zhang Junwei Sha chunnian he Naiqin Zhao School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

The structural deterioration caused by the relatively weak out-of-plane bending stiffness and the chemically-active edge area of graphene limits its outperformance in strengthening for Al matrix composites(AMCs).Introducing one-dimensional(1D)carbon nanotubes(CNTs)to graphene/metal system is one of the promised strategies to complement the weakness of 2D graphene and make full use of the outstanding intrinsic properties of the both *** date,such synergistic strengthening and toughening mechanisms are largely *** this study,AMCs reinforced by a novel hybrid reinforcement,i.e.,graphene nanosheets decorated with Cu nanoparticles and CNTs(Cu@GNS-CNTs),are fabricated by an in-situ synthesis *** combined contrast experiments validated that the organically integrated reinforcing structure promotes the intrinsic load bearing capacity of GNS and the strain hardening capability of the Al matrix *** a result,the composites achieved excellent tensile strength and uniform elongation with almost no *** strengthening mechanism originated primarily from the hybrid reinforcement exhibits superior load-transfer,fracture inhibition and dislocation storage capability by controlling the interface reaction to construct an effective interface structure without damaging the *** work identifies a promising structural modification strategy for 2D materials and provides mechanistic insights into the synergistic strengthening effect of graphene/CNTs hybrid reinforcement.

关键词： Metal-matrix composites(MMCs) Mechanical properties Graphene Synergistic strengthening Interface

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‘Food and medicine continuum’ in the East and West: Old tradition and current regulation

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Chinese herbal Medicines 2023年第1期15卷 6-14页

作者： Ruyu Yao chunnian he Peigen Xiao Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100193China

Food-medicine products are important materials for daily health management and are increasingly popular in the global healthy food ***,because of the biocultural difference,food-medicine knowledge may differ among regions,which hinders the global sharing of such health *** at bridging the food-medicine knowledge in the East and West,this study traced the historical roots of food and medicine continuum of the East and West,which was followed by a cross-cultural assessment on the importance of food-medicine products of China,thereafter,the current legislative terms for foodmedicine products were studied using an international *** results show that the food and medicine continuum in the East and West have their historical roots in the traditional medicines since antiquity,and the food-medicine knowledge in the East and West differs substantially;although the foodmedicine products have common properties,their legislative terms are diverse globally;with proofs of traditional uses and scientific evidence,food-medicine products are possible for cross-cultural ***,we recommend facilitating the cross-cultural communication of the food-medicine knowledge in the East and West,thus to make the best use of the traditional health wisdom in the globe.

关键词： cross-cultural communication food and medicine continuum food-medicine products regulation tradition

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Constructing the coherent transition interface structure for enhancing strength and ductility of hexagonal boron nitride nanosheets/Al composites

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Journal of Materials Science & Technology 2023年第14期145卷 235-248页

作者： Lishi Ma Xiang Zhang Yonghua Duan Siyuan Guo Dongdong Zhao chunnian he Naiqin Zhao School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China School of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

The deformation incompatibility of components is a bottleneck restricting the exaltation of the strength and ductility of ***,the coherent transition interface was designed and produced in hexagonal boron nitride nanosheets(BNNSs)/Al composites by reaction sintering route,expecting to re-lieve the deformation incompatibility between BNNSs and *** is demonstrated that with the sintering temperature for composites raising from 600℃ to 650℃,700℃ and 750℃,different interface bonding characteristics,which involve nucleation and growth of AlN continuous nanolayer,were ***-thermore,first-principles calculations show that the generation of the coherent transition interface im-proved the interfacial bonding strength of BNNSs/Al composites through covalent *** composites with coherent transition interface exhibit excellent strength-toughness combination in tensile and impact *** finite element simulation and in-situ approach under tensile tests were applied to investigate the influence of transition interface structure on deformation behavior of BNNSs/Al *** is found that the generation of the transition interface can not only weaken the stress partitioning behavior in the elastic stage,but also constrain the crack initiation and propagation behavior in the elastic-plastic stage and plastic stage,thereby improving the deformation compatibility between BNNSs and *** present work provides a novel view into the breakthrough for the trade-offrelationship of strength and ductility by coherent transition interface design in nanocomposites.

关键词： Nanocomposites Al-BNNSs system In-situ interface reaction Coherent transition interface Strength and ductility

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Recent Developments of Antimony-Based Anodes for Sodiumand Potassium-Ion Batteries

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Transactions of Tianjin University 2022年第1期28卷 6-32页

作者： Bochao Chen Ming Liang Qingzhao Wu Shan Zhu Naiqin Zhao chunnian he School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

The development of sodium-ion(SIBs)and potassium-ion batteries(PIBs)has increased rapidly because of the abundant resources and cost-effectiveness of Na and ***(Sb)plays an important role in SIBs and PIBs because of its high theoretical capacity,proper working voltage,and low ***,Sb-based anodes have the drawbacks of large volume changes and weak charge transfer during the charge and discharge processes,thus leading to poor cycling and rapid capacity *** address such drawbacks,many strategies and a variety of Sb-based materials have been developed in recent *** review systematically introduces the recent research progress of a variety of Sb-based anodes for SIBs and PIBs from the perspective of composition selection,preparation technologies,structural characteristics,and energy storage ***,corresponding examples are presented to illustrate the advantages or disadvantages of these ***,we summarize the challenges of the development of Sb-based materials for Na/K-ion batteries and propose potential research directions for their further development.

关键词： Sodium-ion batteries Potassium-ion batteries Sb-based materials Energy storage

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Simultaneously optimizing pore morphology and enhancing mechanical properties of Al-Si alloy composite foams by graphene nanosheets

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Journal of Materials Science & Technology 2022年第6期101卷 60-70页

作者： Weiting Li Xudong Yang Kunming Yang chunnian he Junwei Sha Chunsheng Shi Yunhui Mei Jiajun Li Naiqin Zhao Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Sino-European Institute of Aviation Engineering Civil Aviation University of ChinaTianjin 300300China Collaborative Innovation Center of Chemical Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300350China

The integrity and regularity of pore morphology play an important role in determining the mechanical properties of the metallic foam *** conventional methods on refining pore morphology are mainly focused on the optimization of fabrication techniques,however,they are usually inconvenient and ***,incorporating nano reinforcement is considered to be a suitable way to fabricate metallic composite foams accompanied by optimized pore morphology and enhanced mechanical *** this work,through a facile and rapid powder metallurgy foaming method,the aluminum-silicon(Al-Si)alloy composite foams reinforced by graphene nanosheets(GNSs)are successfully *** microstructure analyses reveal that,for the Al-Si alloy foams incorporating the GNSs(GNSs/Al-Si composite foams),the pore size is transformed to be smaller,the pore size distributions become more homogeneous and the pore shape is also refined to a regular and roundish ***,the shape of Si precipitates is found transforming from an irregular long strip(length of~20μm,width of~5μm)to a fine particle state(diameter of~5μm).Moreover,the compressive testing results show that,the 0.4wt%GNSs/Al-Si composite foams own the optimal compression stress of 11.7±0.5 MPa,plateau stress of 10.0±1.0 MPa and energy absorption capacity of 6.8±0.7 MJ/m^(3),which have improvement of 58.1%,53.8%and 51.1%in comparison with the Al-Si alloy foams counterpart,*** present findings may pave a new way for developing new generation of metallic composite foams that with stable microstructure and excellent mechanical performance.

关键词： Metal matrix composites Aluminum foam Graphene Energy absorption

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Achieving high mechanical properties and corrosion resistance of Al-Zn-Mg matrix composites via regulating intragranular reinforcements

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Journal of Materials Science & Technology 2023年第22期153卷 1-7页

作者： Xudong Rong Yue Li Xiaofeng Chen Xiang Zhang Dongdong Zhao chunnian he Chunsheng Shi Naiqin Zhao Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China

*** Driven by the engineering application of transportation and aerospace,simultaneously achieving excellent mechanical properties and corrosion resistance are urgently required for the next-generation Al matrix compo... 详细信息

关键词： corrosion resistance composites

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Si-Assisted Solidification Path and Microstructure Control of 7075 Aluminum Alloy with Improved Mechanical Properties by Selective Laser Melting

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Acta Metallurgica Sinica(English Letters) 2022年第9期35卷 1424-1438页

作者： Junwei Sha Meixian Li Lizhuang Yang Xudong Rong Bowen Pu Dongdong Zhao Simi Sui Xiang Zhang chunnian he Jianglin Lan Naiqin Zhao School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin UniversityTianjin300350China Collaborative Innovation Center of Chemical Science and Engineering Tianjin300350China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin300350China Central Iron and Steel Research Institute(CISRI) Beijing100081China

The construction and application of traditional high-strength 7075 aluminum alloy(Al7075) through selective laser melting(SLM) are currently restricted by the serious hot cracking phenomenon. To address this critical issue, in this study, Si is employed to assist the SLM printing of high-strength Al7075. The laser energy density during SLM is optimized, and the eff ects of Si element on solidification path, relative density, microstructure and mechanical properties of Al7075 alloy are studied systematically. With the modified solidification path, laser energy density, and the dense microstructure with refined grain size and semi-continuous precipitates network at grain boundaries, which consists of fine Si, β-MgSi, Q-phase and θ-AlCu, the hot cracking phenomenon and mechanical properties are eff ectively improved. As a result, the tensile strength of the SLM-processed Si-modified Al7075 can reach 486 ± 3 MPa, with a high relative density of ~ 99.4%, a yield strength of 291 ± 8 MPa, fracture elongation of(6.4 ± 0.4)% and hardness of 162 ± 2(HV) at the laser energy density of 112.5 J/mm~3. The main strengthening mechanism with Si modification is demonstrated to be the synergetic enhancement of grain refinement, solution strengthening, load transfer, and dislocation strengthening. This work will inspire more new design of high-strength alloys through SLM.

关键词： Selective laser melting(SLM) 7075 aluminum alloy High-strength alloy Microstructure control Solidification path

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