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Residual stress measurement and analysis of siliceous slate-containing quartz veins

International Journal of Minerals,Metallurgy and Materials 2023年第12期30卷 2310-2320页

作者： Tao Wang Weiwei Ye Yemeng Tong naisheng jiang Liyuan Liu School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao 266590China

Engineering geological disasters such as rockburst have always been a critical factor affecting the safety of coal mine ***,residual stress is considered a feasible method to explain these geomechanical *** this study,electron backscatter diffraction(EBSD)and optical microscopy were used to characterize the rock microcosm.A measuring area that met the requirements of X-ray diffraction(XRD)residual stress measurement was determined to account for the mechanism of rock residual ***,the residual stress of a siliceous slate-containing quartz vein was measured and calculated using the sin^(2) ϕ method equipped with an X-ray *** of microscopic test results showed homogeneous areas with small particles within the millimeter range,meeting the requirements of XRD stress measurement *** was determined as the calibration mineral for slate samples containing quartz *** diffraction patterns of the(324)crystal plane were obtained under different ϕ and φ.The deviation direction of the diffraction peaks was consistent,indicating that the sample tested had residual *** addition,the principal residual stress within the quartz vein measured by XRD was compressive,ranging from 10 to 33 *** maximum principal stress was parallel to the vein trend,whereas the minimum principal stress was perpendicular to the vein ***,the content of the low-angle boundary and twin boundary in the quartz veins was relatively high,which enhances the resistance of the rock mass to deformation and promotes the easy formation of strain concentrations,thereby resulting in residual *** proposed method for measuring residual stress can serve as a reference for subsequent observation and related research on residual stress in different types of rocks.

关键词： residual stress siliceous sand rock microstructure X-ray diffraction electron backscatter diffraction

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Disturbance failure mechanism of highly stressed rock in deep excavation:Current status and prospects

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 611-627页

作者： Tao Wang Weiwei Ye Liyuan Liu Kai Liu naisheng jiang Xianhui Feng School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China Department of Engineering Science University of OxfordParks RoadOxford OX13PJUK School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

This article reviews the current status on the dynamic behavior of highly stressed rocks under ***,the experimental apparatus,methods,and theories related to the disturbance dynamics of deep,high-stress rock are reviewed,followed by the introduction of scholars’research on deep rock deformation and failure from an energy ***,with a backdrop of highstress phenomena in deep hard rock,such as rock bursts and core disking,we delve into the current state of research on rock microstructure analysis and residual stresses from the perspective of studying the energy storage mechanisms in ***,the current state of research on the mechanical response and the energy dissipation of highly stressed rock formations is briefly ***,the insufficient aspects in the current research on the disturbance and failure mechanisms in deep,highly stressed rock formations are summarized,and prospects for future research are *** work provides new avenues for the research on the mechanical response and damage-fracture mechanisms of rocks under high-stress conditions.

关键词： deep rock with high stress highly stressed rock rock failure residual stress energy release

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Highly Aligned Graphene Aerogels for Multifunctional Composites

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Nano-Micro Letters 2024年第6期16卷 276-342页

作者： Ying Wu Chao An Yaru Guo Yangyang Zong naisheng jiang Qingbin Zheng Zhong‑Zhen Yu Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004People’s Republic of China School of Science and Engineering The Chinese University of Hong KongShenzhenShenzhenGuangdong 518172People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Stemming from the unique in-plane honeycomb lattice structure and the sp^(2)hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds,graphene exhibits remarkable anisotropic electrical,mechanical,and thermal *** maximize the utilization of graphene’s in-plane properties,pre-constructed and aligned structures,such as oriented aerogels,films,and fibers,have been *** unique combination of aligned structure,high surface area,excellent electrical conductivity,mechanical stability,thermal conductivity,and porous nature of highly aligned graphene aerogels allows for tailored and enhanced performance in specific directions,enabling advancements in diverse *** review provides a comprehensive overview of recent advances in highly aligned graphene aerogels and their *** highlights the fabrication methods of aligned graphene aerogels and the optimization of alignment which can be estimated both qualitatively and *** oriented scaffolds endow graphene aerogels and their composites with anisotropic properties,showing enhanced electrical,mechanical,and thermal properties along the alignment at the sacrifice of the perpendicular *** review showcases remarkable properties and applications of aligned graphene aerogels and their composites,such as their suitability for electronics,environmental applications,thermal management,and energy *** and potential opportunities are proposed to offer new insights into prospects of this material.

关键词： Highly aligned graphene aerogels Quantitative characterization of alignment Multifunctional composites Anisotropic properties Multifunctional applications

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The constitutes and isomer distribution of di-(potassium sulfonate)-di-phthalimidomethyl phthalocyanine zinc

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Chinese Science Bulletin 2008年第11期53卷 1657-1664页

作者： WANG Jian LIU Hong XUE JinPing jiang Zhou CHEN naisheng HUANG JinLing Institute of Research on Functional Materials Department of Chemistry College of Chemistry and Chemical Engineering FuzhouUniversity Fuzhou 350002 China

Sulfonate and/or phthalimidomethyl phthalocyanine zincs are obtained by the condensation reaction of anhydrous zinc acetate and two precursors, i.e. 4-phthalimidomethyl phthalonitrile and 4-(potassium sulfonated) phthalonitrile. The ZnPcSnPm mixture was separated into 5 components according to the number of substituted sulfonate groups and each component which has the same chemical constituent consists of different regioisomers. An HPLC method in isocratic conditions was developed to exercise quality control and make quantitative analysis of the photosensitizer, di-(potassium sulfonate)-di-phthalimidomethyl phthalocyanine zinc (abbreviated as ZnPcS2P2, here, S represents sulfonate group, P the phthalimidomethyl group and ZnPc the phthalocyanine zinc). Furthermore, by comparing the retention behavior of ZnPcS2P2 with that of ZnPcS2, positional structure of isomers of ZnPcS2P2 was speculated. Reversed-phase HPLC method with TEA-phosphate buffer and DMF as eluents in gradient conditions has been proved to be a powerful tool for the separation of such complex system.

关键词：磺酸钾异构体苯二酰亚氨基甲基酞菁锌缩合反应

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仿生皮脂脂质体OriginalSL^(TM)的开发与皮肤屏障修复效果评估

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香料香精化妆品 2024年第3期 155-162页

作者：孙静卢永杰耿林刘艳红张兵张炽坚罗莹姜乃生花安堂生物科技集团有限公司广东广州511400 北京科技大学材料科学与工程学院北京100083

旨在通过模拟人体皮肤细胞间脂质的组成和配比,开发一种仿生皮脂脂质体(OriginalSL^(TM))。该脂质体通过纳米包裹技术共包裹神经酰胺、胆固醇和白池花(Limnanthes alba)籽油,以模拟皮肤自然分泌的皮脂。结果表明,OriginalSL^(TM)为寡层... 详细信息

旨在通过模拟人体皮肤细胞间脂质的组成和配比,开发一种仿生皮脂脂质体(OriginalSL^(TM))。该脂质体通过纳米包裹技术共包裹神经酰胺、胆固醇和白池花(Limnanthes alba)籽油,以模拟皮肤自然分泌的皮脂。结果表明,OriginalSL^(TM)为寡层脂质结构,其平均粒径为(170.2±2.3)nm,PDI值为0.02,包封率为98.0%,且在体积分数≤2.5%时无明显细胞毒性,细胞安全性良好。在3D表皮皮肤模型中,相较于单一神经酰胺或白池花籽油脂质体,OriginalSL^(TM)具有更好的保湿和修复功效,具有良好的应用价值。

关键词：仿生皮脂皮肤屏障修复脂质体神经酰胺白池花(Limnanthes alba)籽油

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Cross-shore suspended sediment flux in the salt marsh pioneer zone of Chongming eastern beach in the Chang- jiang Estuary in China

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Acta Oceanologica Sinica 2010年第6期29卷 62-72页

作者： WANG Chu YAO Dongjing HE Baogen ZHOU naisheng XU Shiyuan Department of Geography Shanghai Normal University Shanghai 200234 China Department of Geography College of Resource and Environmental Science East China Normal University Shanghai 200062 China

Between April 2002 and April 2003,in situ measurements of water depth,current velocity and suspended sediment content were carried out in edge region of East Chongming salt marsh and neighboring bald flat in the Changjiang （Yangtze） Estuary under different weather ***-shore suspended sediment flux was calculated and *** results show that under calm weather conditions,the current velocity process in bald field and salt marsh area varied differently during semidiurnal tidal *** to current velocity asymmetry,mean SSC during flood tide phase was 1.8 times higher than that of ebb tide *** a result,net onshore sediment flux controlled cross-shore suspended sediment transport process and salt marsh pioneer zone was generally *** was significant positive correlation between total sediment flux and quartic power of maximum water *** indicates that tidal ranges dominate suspended sediment transport and sedimentation process in the salt marsh pioneer zone under the calm weather *** sedimentation rate on the adjacent mudflat was higher than the salt marsh,which induced stable accreting of salt marsh towards the *** wind events enhanced SSC and current velocity during the semidiurnal *** the remarkable onshore net sediment flux could occur on the high marsh and mudflat close to the marsh fringe during the short period under the rough weather condition.

关键词： current velocity suspended sediment content flux salt marsh eastern beach

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Selenium deficiency facilitates inflammation through the regulation of TLR4 and TLR4-related signaling pathways in the mice uterus

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畜牧与饲料科学 2015年第Z1期 362-363页

作者： ZHANG Zecai GAO Xuejiao GUO Mengyao jiang Haichao WANG Tiancheng SONG Xiaojing CAO Yongguo ZHANG naisheng College of Veterinary Medicine Jilin University

Selenium(Se) is an essential nutritional trace element that affects the development and function of the reproductive *** is a reproductive obstacle disease that can seriously reduce the reproductive capacity of *** study the effects of dietary Se deficiency on LPS-induced mice endometritis,we generated a model of LPS-induced mice *** Se content in uterine tissues was detected by fluorescence *** levels of TNF-α,IL-1β and IL-6 were measured by enzyme-linked immunosorbent assay(ELISA) and quantitative real-time polymerase chain reaction(qRT-PCR).The extent of phosphorylation of IκBα,NF-κB p65,ERK,JNK,p38 and the expression of Toll-like receptor 4(TLR4) were detected with western *** TLR4 mRNA was analyzed with *** results indicated that dietary Se intake significantly influenced Se levels in uterine *** Se-deficient mice model was successfully replicated,and Se deficiency exacerbated uterine tissue histopathology,increased the expression of TNF-α,IL-1β and IL-6,facilitated the activation of TLR4,and enhanced the phosphorylation of IκBα,p65,ERK,JNK,and p38 in LPS-induced mice endometritis,and the effects were inhibited by a supplement of *** conclusion,our studies demonstrated that Se deficiency makes mice uterus more prone to *** appropriate Se supplement could enhance the immune condition of the uterus.

关键词： selenium endometritis TLR4 inflammation signaling pathway

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老年高血压病患者血清可溶性白介素2受体与临床分期相关性的观察

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中国老年学杂志 1999年第2期19卷 80-81页

作者：林光柱吴巧白求恩医科大学第一临床学院干部病房长春市第五人民医院

目的探讨老年高血压病患者血清中可溶性白介素－２受体（ｓＩＬ－２Ｒ）的水平，并比较老年高血压病不同临床分期的ｓＩＬ－２Ｒ变化，采用双抗体夹心（ＥＬＩＳＡ）法，对４６例老年高血压病人血清ｓＩＬ－２Ｒ的水平，与３０例正常... 详细信息

目的探讨老年高血压病患者血清中可溶性白介素－２受体（ｓＩＬ－２Ｒ）的水平，并比较老年高血压病不同临床分期的ｓＩＬ－２Ｒ变化，采用双抗体夹心（ＥＬＩＳＡ）法，对４６例老年高血压病人血清ｓＩＬ－２Ｒ的水平，与３０例正常人（ＮＣ）进行检测对比，并对其老年高血压病患者不同临床分期的ｓＩＬ－２Ｒ的水平进行观察。

关键词：高血压 sIL-2R 临床分期老年人

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The gut microbiota contributes to the development of Staphylococcus aureus-induced mastitis in mice

The gut microbiota contributes to the development of Staphyl...

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中国畜牧兽医学会兽医产科学分会第八届会员代表大会暨第十五次学术研讨会

作者： HU Xiaoyu GUO Jian ZHAO Caijun jiang Peng T.Maimai LI Yanyi CAO Yongguo FU Yunhe ZHANG naisheng Department of Clinical Veterinary Medicine College of Veterinary Medicine Jilin University

Objective:Mastitis is one of the most prevalent diseases in dairy farming *** gut microbiota plays an important role in the regulation of systemic and local inflammatory diseases,such as ***,the regulatory mechanism of the gut microbiota on mastitis is still ***,the aim of this study was to investigate the function and regulatory mechanisms of the gut microbiota in host defense against mastitis caused by Staphylococcus aureus(***) ***:A mouse gut microbiota-dysbiosis model was initiated by a mixture of antibiotics(Abx),and subsequently,a model of mastitis was established by mammary gland perfusion of *** microbiota transplantation(FMT) was performed to evaluate the relationship between the gut microbiota and ***,mice were treated with SCFAs and butyrate-producing bacteria to study the protective effects and mechanism of gut probiotics on ***:Increased blood-milk barrier permeability,and ***-induced mastitis severity were observed gut microbiota-dysbiosis mice compared with those in control ***,feces microbiota transplantation(FMT) to microbbiota-dysbiosis mice reversed these ***,established disruption of commensal homeostasis results in significantly increased abundance of pathogenic Enterobacter bacteria,while the relative abundance of short-chain fatty acid(SCFAs)-producing bacterial phyla(Firmicutes and Bacteroidetes) was significantly ***,FMT to gut microbiota-dysbiosis mice reversed these *** addition,dysbiosis reduced the levels of SCFAs,and administration of sodium propionate,sodium butyrate,and probiotics(butyrate-producing bacteria) reversed the changes in the blood-milk barrier and reduced the severity of mastitis induced by ***:This new finding demonstrated that the gut microbiota acts as a protective factor in host defense against mastitis and that targeting the gut-mammary gland axis represents a pro

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加载次序对沥青混合料疲劳损伤累积的影响

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材料导报 2023年第24期37卷 174-179页

作者：房辰泽郭乃胜蒋继望冷真李辉陆国阳王昊鹏大连海事大学交通运输工程学院辽宁大连116026 香港理工大学土木及环境工程学系中国香港九龙999077 东南大学交通学院南京210094 诺丁汉大学诺丁汉交通工程中心英国诺丁汉NG72RD

沥青混合料在变幅加载下的疲劳损伤累积过程具有明显的非线性特征,然而传统的线性损伤累积准则无法表征不同加载次序下的非线性疲劳损伤累积(NLFDA)。为研究加载次序对沥青混合料疲劳损伤累积的影响,首先开展恒幅加载疲劳试验,分析恒幅... 详细信息

沥青混合料在变幅加载下的疲劳损伤累积过程具有明显的非线性特征,然而传统的线性损伤累积准则无法表征不同加载次序下的非线性疲劳损伤累积(NLFDA)。为研究加载次序对沥青混合料疲劳损伤累积的影响,首先开展恒幅加载疲劳试验,分析恒幅加载下的疲劳损伤累积规律;其次借助变幅加载疲劳试验,分析变幅加载下的疲劳损伤累积规律;最后建立考虑加载次序的NLFDA模型,分析加载次序对沥青混合料疲劳损伤累积的影响。结果表明:恒幅加载下沥青混合料疲劳损伤发生非线性演化,但服从线性损伤累积准则,且累积寿命分数为1;变幅加载会导致疲劳损伤发生非线性演化,且服从非线性损伤累积准则,低-高和高-低加载次序的累积寿命分数分别大于1和小于1;建立的NLFDA模型可较为准确地表征沥青混合料疲劳损伤对加载次序的依赖性。

关键词：道路工程疲劳损伤累积加载次序沥青混合料

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