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Effects of carbon content on the microstructure and tensile properties of a low-density steel

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 391-401页

作者： Yongxuan Shang Mingyu Fan Shuyong jiang Zhongwu Zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Metal Material for Marine Equipment and Application Iron&Steel Research Institute of Ansteel Group CorporationAnshan 114009China

Carbon can change the phase components of low-density steels and influence the mechanical *** this study,a new method to control the carbon content and avoid the formation ofδ-ferrite by decarburization treatment was *** microstructural changes and mechanical characteristics with carbon content induced by decarburization were systematically ***-Jaoul(C-J)analysis was employed to examine the work hardening characteristics during the tensile *** decarburization by heat treatments,the carbon content within the austenite phase decreased,while Mn and Al were almost unchanged;this made the steel with full austenite transform into the austenite and ferrite dual ***,(Ti,V)C carbides existed in both matrix phase and the mole fraction almost the *** addition,the formation of other carbides *** loss induced a decrease in strength due to the weakening of the carbon solid *** the steel with the single austinite,the deformation mode of austenite was the dislocation planar glide,resulting in the formation of *** the dual-phase steel,the deformation occurred by the dislocation planar glide of austenite first,with the increase in strain,the cross slip of ferrite took place,forming dislocation cells in *** the late stage of deformation,the work hardening of austinite increased rapidly,while that of ferrite increased slightly.

关键词： low-density steels carbon content decarburization strengthening mechanisms work hardening behavior

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地膜覆盖对菜地垄沟CH4和N2O排放的影响

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环境科学 2021年第3期42卷 1559-1568页

作者：熊维霞江长胜赵仲婧曾唯胡曼利涂婷婷陈俊江郝庆菊西南大学资源环境学院西南山地生态循环农业国家级培育基地重庆400716 三峡库区生态环境教育部重点实验室重庆400715

为了探讨地膜覆盖对菜地垄沟温室气体CH4和N2O排放的影响,以位于西南大学农业部重庆紫色土生态环境重点野外科学观测试验站内辣椒-萝卜轮作菜地为研究对象,采用静态暗箱/气相色谱法,进行为期1 a的田间原位观测.本试验设置常规和覆膜两... 详细信息

为了探讨地膜覆盖对菜地垄沟温室气体CH4和N2O排放的影响,以位于西南大学农业部重庆紫色土生态环境重点野外科学观测试验站内辣椒-萝卜轮作菜地为研究对象,采用静态暗箱/气相色谱法,进行为期1 a的田间原位观测.本试验设置常规和覆膜两种处理方式,研究地膜覆盖对菜地垄沟中CH4和N2O排放的影响.结果表明,地膜覆盖能极显著提高土壤全年pH(P0.05),辣椒季常规和覆膜处理分别为0.058 mg·(m^(2)·h)^(-1)和0.057 mg·(m^(2)·h)^(-1),萝卜季分别为0.083mg·(m^(2)·h)^(-1)和0.092 mg·(m^(2)·h)^(-1),对比垄和沟,除了辣椒季常规处理下垄CH4排放量显著高于沟,其它均为沟显著高于垄,这与西南地区较高的降雨量下沟内较稳定的缺氧环境有关.覆膜处理对N2O没有显著影响,辣椒季垄N2O的平均排放通量常规和覆膜处理下分别为65.41μg·(m^(2)·h)^(-1)和68.39μg·(m^(2)·h)^(-1),萝卜季分别为78.43μg·(m^(2)·h)^(-1)和66.19μg·(m^(2)·h)^(-1),辣椒季沟N2O的平均排放通量分别为19.82μg·(m^(2)·h)^(-1)和22.85μg·(m^(2)·h)^(-1),萝卜季分别为35.80μg·(m^(2)·h)^(-1)和40.00μg·(m^(2)·h)^(-1),均无显著差异(P>0.05),对比垄和沟,垄N2O的排放量显著高于沟,N2O主要由垄向大气排放.CH4排放通量与地表及地下5 cm温度呈显著正相关,N2O的排放通量仅与碱解氮和铵态氮含量呈显著正相关.

关键词：地膜覆盖温室气体菜地垄沟排放通量

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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： jun jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

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以标准化引领推动电子商务产业健康发展的思考

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中国标准化 2017年第1期 103-105页

作者：汪俊臣蒋奕平杭州国家电子商务产品质量监测处置中心

以互联网技术为核心的电子商务,在爆发式增长的同时,规范发展、持续发展和健康发展问题成为了当前社会各界共同关注的焦点。本文从标准化理念和思维为统领,在调查研究和工作实践基础上,深入剖析了当前电子商务新业态在标准化方面存在的... 详细信息

以互联网技术为核心的电子商务,在爆发式增长的同时,规范发展、持续发展和健康发展问题成为了当前社会各界共同关注的焦点。本文从标准化理念和思维为统领,在调查研究和工作实践基础上,深入剖析了当前电子商务新业态在标准化方面存在的问题,提出了以标准化引领电子商务产业健康发展的实现路径。

关键词：标准化电子商务健康发展

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Exploring the interaction between the gut microbiota and cyclic adenosine monophosphate-protein kinase A signaling pathway:a potential therapeutic approach for neurodegenerative diseases

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Neural Regeneration Research 2025年第11期20卷 3095-3112页

作者： Fengcheng Deng Dan Yang Lingxi Qing Yifei chen Jilian Zou Meiling Jia Qian Wang Runda jiang Lihua Huang College of Pharmacy Chengdu University of Traditional Chinese MedicineChengduSichuan ProvinceChina State Key Laboratory of Southwestern Chinese Medicine Resources Chengdu University of Traditional Chinese MedicineChengduSichuan ProvinceChina

The interaction between the gut microbiota and cyclic adenosine monophosphate(cAMP)-protein kinase A(PKA)signaling pathway in the host's central nervous system plays a crucial role in neurological diseases and enhances communication along the gut–brain *** gut microbiota influences the cAMP-PKA signaling pathway through its metabolites,which activates the vagus nerve and modulates the immune and neuroendocrine ***,alterations in the cAMP-PKA signaling pathway can affect the composition of the gut microbiota,creating a dynamic network of microbial-host *** reciprocal regulation affects neurodevelopment,neurotransmitter control,and behavioral traits,thus playing a role in the modulation of neurological *** coordinated activity of the gut microbiota and the cAMP-PKA signaling pathway regulates processes such as amyloid-β protein aggregation,mitochondrial dysfunction,abnormal energy metabolism,microglial activation,oxidative stress,and neurotransmitter release,which collectively influence the onset and progression of neurological *** study explores the complex interplay between the gut microbiota and cAMP-PKA signaling pathway,along with its implications for potential therapeutic interventions in neurological *** pharmacological research has shown that restoring the balance between gut flora and cAMP-PKA signaling pathway may improve outcomes in neurodegenerative diseases and emotional *** can be achieved through various methods such as dietary modifications,probiotic supplements,Chinese herbal extracts,combinations of Chinese herbs,and innovative dosage *** findings suggest that regulating the gut microbiota and cAMP-PKA signaling pathway may provide valuable evidence for developing novel therapeutic approaches for neurodegenerative diseases.

关键词： cyclic adenosine monophosphate emotional disorders gut microbiota neurodegenerative diseases neurological diseases protein kinase A reciprocal regulation signaling pathway strategy therapies

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Effect of lamellarization on the microstructure and mechanical properties of marine 10Ni5CrMoV steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 402-413页

作者： Tao Zou Yanwu Dong Zhouhua jiang Shuyang Du Yushuo Li School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Northeastern UniversityShenyang 110819China

Multistage heat treatment involving quenching(Q),lamellarizing(L),and tempering(T)is applied to marine 10Ni5CrMoV *** microstructure and mechanical properties were studied by multiscale characterizations,and the kinetics of reverse austenite transformation,strain hardening behavior,and toughening mechanism were further *** lamellarized specimens possess low yield strength but high toughness,especially cryogenic *** leads to the development of film-like reversed austenite at the martensite block and lath boundaries,refining the martensite structure and lowering the equivalent grain *** analysis of austenite reversion based on the JMAK model shows that the isothermal transformation is dominated by the growth of reversed austenite,and the maximum transformation of reversed austenite is reached at the peak temperature(750℃).The strain hardening behavior based on the modified Crussard-Jaoul analysis indicates that the reversed austenite obtained from lamellarization reduces the proportion of martensite,significantly hindering crack propagation via martensitic transformation during the *** a consequence,the QLT specimens exhibit high machinability and low yield *** with the QT specimen,the ductile-brittle transition temperature of the QLT specimens decreases from-116 to-130℃due to the low equivalent grain size and reversed austenite,which increases the cleavage force required for crack propagation and absorbs the energy of external load,*** work provides an idea to improve the cryogenic toughness of marine 10Ni5CrMoV steel and lays a theoretical foundation for its industrial application and comprehensive performance improvement.

关键词： 10Ni5CrMoV steel lamellarizing reversed austenite cryogenic toughness ductile-brittle transition temperature

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Effects of ultrasonic-assisted extraction on bioactive compounds,volatile flavors and antioxidant activities of vine tea water extracts

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Traditional Medicine Research 2025年第1期10卷 73-81页

作者： Xiao-Long Zhou Wei-Jin jiang Ji Yu Mao-jun Yao Yun-Tong Li Hunan Provincial Key Laboratory of Research Resource Mining and High-valued Utilization on Edible&Medicinal PlantCollege of Chemistry and Chemical EngineeringJishou UniversityJishou 416000China Hunan Gaoge Dairy Co. Ltd.Changsha 410000China

Background:Ampelopsis grossedentata,vine tea,which is the tea alternative beverages in *** vine tea processing,a large amount of broken tea is produced,which has low commercial ***:This study investigates the influence of different extraction methods(room temperature water extraction,boiling water extraction,ultrasonic-assisted room temperature water extraction,and ultrasonic-assisted boiling water extraction,referred to as room temperature water extraction(RE),boiling water extraction(BE),ultrasonic assistance at room temperature water extraction(URE),and ultrasonic assistance in boiling water extraction(UBE))on the yield,dihydromyricetin(DMY)content,free amino acid composition,volatile aroma components,and antioxidant properties of vine tea ***:A notable influence of extraction temperature on the yield of vine tea extracts(P<0.05),with BE yielding the highest at 43.13±0.26%,higher than that of RE(34.29±0.81%).Ultrasound-assisted extraction significantly increased the DMY content of the extracts(P<0.05),whereas DMY content in the RE extracts was 59.94±1.70%,that of URE reached 66.14±2.78%.Analysis revealed 17 amino acids,with L-serine and aspartic acid being the most abundant in the extracts,nevertheless ultrasound-assisted extraction reduced total free amino acid *** chromatography-mass spectrometry analysis demonstrated an increase in the diversity and quantity of compounds in the vine tea water extracts obtained through ultrasonic-assisted ***,69 and 68 volatile compounds were found in URE and UBE extracts,which were higher than the number found in RE and BE *** vitro,antioxidant activity assessments revealed varying antioxidant capacities among different extraction methods,with RE exhibiting the highest DPPH scavenging rate,URE leading in ABTS•+free radical scavenging,and BE demonstrating superior ferric ion reducing antioxidant ***:The findings suggest that extraction methods signi

关键词： vine tea dihydromyricetin ultrasonic-assisted extraction volatile aroma components

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基于2018-2022年国家自然科学基金结题项目分析干细胞研究现状

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中国组织工程研究 2025年第19期29卷 4145-4150页

作者：蒋君张玢中国医学科学院医学信息研究所北京市100005

背景:目前大多数研究从国家自然科学基金资助论文和项目申请角度出发,对干细胞某一方面进行深入分析,或者验证某种评价方法,缺乏对干细胞领域国家自然科学基金已结题项目的全面分析。目的:了解2018-2022年干细胞领域国家自然科学基金结... 详细信息

背景:目前大多数研究从国家自然科学基金资助论文和项目申请角度出发,对干细胞某一方面进行深入分析,或者验证某种评价方法,缺乏对干细胞领域国家自然科学基金已结题项目的全面分析。目的:了解2018-2022年干细胞领域国家自然科学基金结题项目资助情况及研究热点,为后续研究提供参考。

关键词：干细胞国家自然科学基金聚类分析研究热点文献计量学

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Constraints on holographic QCD phase transitions from PTA observations

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： Song He Li Li Sai Wang Shao-jiang Wang Center for Theoretical Physics and College of Physics Jilin University School of Physical Science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

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瞬时受体电位香草酸亚型1在膀胱出口梗阻诱导逼尿肌过度活动中的作用

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中华泌尿外科杂志 2016年第12期37卷 899-903页

作者：张兆存朱耀丰陈军蒋学文李岩陈守臻史本康山东大学齐鲁医院泌尿外科济南250012

目的研究瞬时受体电位香草酸亚型1（TRPV1）在膀胱出口梗阻诱导逼尿肌过度活动发生发展中的作用.方法 2014年6-12月.将雌性Wistar大鼠60只随机分成两组：实验组（n=40）和对照组（n=20）,实验组采用部分结扎近端尿道的方式构建逼尿肌... 详细信息

目的研究瞬时受体电位香草酸亚型1（TRPV1）在膀胱出口梗阻诱导逼尿肌过度活动发生发展中的作用.方法 2014年6-12月.将雌性Wistar大鼠60只随机分成两组：实验组（n=40）和对照组（n=20）,实验组采用部分结扎近端尿道的方式构建逼尿肌过度活动（detrusor overactivivity,DO）大鼠模型,术后6周行膀胱尿动力学检测成模DO大鼠情况.取两组大鼠膀胱和脊髓背根神经节组织通过实时定量PCR、蛋白质印迹法和免疫组化染色检查检测TRPV1的表达情况;通过膀胱逼尿肌离体肌条实验检测逼尿肌收缩性能变化以及对TRPV1激动剂（辣椒素）的反应.结果 40只大鼠接受膀胱出口部分结扎,其中26只出现DO（为DO组）.在膀胱中,TRPV1受体主要表达于黏膜下层神经纤维末梢,而膀胱上皮未见明显的TRPV1表达.离体肌条实验中,DO组肌条收缩的振幅（0.69±0.11）g明显高于对照组（0.26±0.05）g,收缩频率（8.75±0.54） Hz也高于对照组（5.91±0.59） Hz,两组差异均有统计学意义（均P＜0.05）;辣椒素可明显增加肌条收缩幅度而对频率无明显影响,该效果在DO组更加明显.DO组大鼠膀胱中TRPV1水平（0.36±0.03）明显高于对照组（0.18±0.02）;DO组大鼠脊髓背根神经节中TRPV1水平（0.66±0.04）也明显高于对照组（0.41±0.05）,差异均有统计学意义（均P＜0.05）.结论 TRPV1参与BOO诱导的DO的发生,可能通过直接增加膀胱传人纤维敏感性或间接增加逼尿肌内在收缩活性从而诱导逼尿肌不稳定性的发生.

关键词：膀胱出口梗阻逼尿肌过度活动瞬时受体电位香草酸亚型1(TRPV1) 辣椒素

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