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Catalytic Mechanism of KCl during Carbothermic Reduction of Pre-Oxidized Ilmenite

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Journal of Iron and Steel Research International 2001年第2期8卷 7-11页

作者： SUN Kang wu jian-hui Northeastern University

As alkali additive,KC1 catalyzes effectively the carbothermic reduction of pre-oxidized ilmenite,and the catalytic effect becomes more remarkable as the amount of KC1 *** the carbothermic reduction,the gaseous product consists mainly of CO,and the partial pressure of which increases with reaction *** EPMA and XPS of the partially reduced ilmenite ore and that of the used graphite as reductant showed that the potassium ions enter both ilmenite particles and graphite powders during *** above-mentioned phenomena result in the distortion of ilmenite and carbon structure by potassium ions and reaction activity of carbon and ilmenite was *** a result,the overall carbothermic reduction was catalyzed by KC1.

关键词： carbothermic reduction catalytic effect reaction mechanism alkali additives preoxidized ilmenite

公益林补偿收益权质押贷款模式适用条件与推广策略——基于国内4种典型模式的比较分析

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林产工业 2024年第9期61卷 86-92页

作者：罗伟强张敏秦涛于航武建辉广西北部湾林业产权交易中心广西南宁530028 北京林业大学经济管理学院北京100083

公益林补偿收益权质押贷款模式的创新对于缓解林农资金短缺、盘活公益林资源具有重大意义。本文梳理归纳了国内典型的4种公益林补偿收益权质押贷款模式的操作流程和运行模式,并从贷款模式、实施方式、借款对象、贷款结构、风控机制5个... 详细信息

公益林补偿收益权质押贷款模式的创新对于缓解林农资金短缺、盘活公益林资源具有重大意义。本文梳理归纳了国内典型的4种公益林补偿收益权质押贷款模式的操作流程和运行模式,并从贷款模式、实施方式、借款对象、贷款结构、风控机制5个方面进行比较。研究发现:当地经济状况、公益林资源基础条件、贷款主体类型和规模以及农村金融市场成熟度会影响不同贷款模式应用条件。由此,建议各地区结合实际情况选择适合的贷款模式,并从发展林下经济、完善公益林收益权登记制度、充分利用质押担保机制、完善收益权流转评估体系和发挥基层组织的牵头作用五方面提出建议。

关键词：公益林补偿收益权质押贷款模式比较适用条件推广策略

基于Citespace的中医药治疗非哺乳期乳腺炎文献计量分析

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中国民族医药杂志 2024年第2期30卷 53-56页

作者：叶美贤王宇坤梁藐尹王雅惠巫建辉广西中医药大学广西南宁530001 广西中医药大学第一附属医院甲状腺乳腺外科广西南宁530023

目的:通过对中医药治疗非哺乳期乳腺炎(non-puerperal mastitis,NPM)进行系统的文献计量和可视化分析,探索该研究领域的研究现状、研究热点和发展趋势,为中医药治疗NPM领域的研究者提供有价值的参考。方法:检索中国知网(CNKI)2003-2023... 详细信息

目的:通过对中医药治疗非哺乳期乳腺炎(non-puerperal mastitis,NPM)进行系统的文献计量和可视化分析,探索该研究领域的研究现状、研究热点和发展趋势,为中医药治疗NPM领域的研究者提供有价值的参考。方法:检索中国知网(CNKI)2003-2023年中医药治疗NPM相关的所有文献,基于Citespace可视化软件的文献计量分析,以作者、研究机构和关键词的共现图谱形式呈现国内NPM研究现状及趋势,并进行分析。结果:NPM相关文献发表量总体呈增长趋势,核心作者有41位,张董晓是发表最多的研究者;北京中医药大学、山东中医药大学、湖南中医药大学是主要的发文机构,机构合作主要是中医药大学和大学附属机构;关键词构成11个聚类标签,研究热点主要集中在中医治疗、临床观察、临床疗效、数据挖掘。结论:图谱以直观的方式呈现了今后研究NPM的趋势主要在中医治疗、临床观察、临床疗效、数据挖掘等方面。

关键词：非哺乳期乳腺炎中医药可视化分析文献计量学

Carbon-based nanomaterials cause toxicity by oxidative stress to the liver and brain in Sprague-Dawley rats

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Nuclear Science and Techniques 2024年第6期35卷 54-64页

作者： Ying-Ying Xu Chan Jin Meng wu jian-Ye Zhou hui-Ling Wei Department of Gastroenterology China-Japan Friendship HospitalBeijing 100029China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Institute of Particle and Nuclear Physics College of PhysicsHenan Normal UniversityXinxiang 453007China

Carbon-based nanomaterials have important research significance in various disciplines,such as composite materials,nanoelectronic devices,biosensors,biological imaging,and drug ***,the human and ecological risks associated with carbon-based nanomaterials have received increasing ***,the biological safety of carbon based nanomaterials has not been systematically *** this study,we used different types of carbon materials,namely,graphene oxide(GO),single-walled carbon nanotubes(SWCNTs),and multiwalled carbon nanotubes(MWCNTs),as models to observe their distribution and oxidative damage in *** results of Histopathological and ultrastructural examinations indicated that the liver and lungs were the main accumulation targets of these ***-μ-XRF analysis revealed that SWCNTs and MWCNTs might be present in the *** shows that the three types of carbon-based nanomaterials could cross the gas-blood barrier and eventually reach the liver *** addition,SWCNTs and MWCNTs could cross the blood-brain barrier and accumulate in the cerebral *** increase in ROS and MDA levels and the decrease in GSH,SOD,and CAT levels indicated that the three types of nanomaterials might cause oxidative stress in the *** suggests that direct instillation of these carbon-based nanomaterials into rats could induce ROS *** addition,iron(Fe)contaminants in these nanomaterials were a definite source of free ***,these nanomaterials did not cause obvious damage to the rat brain *** deposition of selenoprotein in the rat brain was found to be related to oxidative stress and Fe *** information may support the development of secure and reasonable applications of the studied carbon-based nanomaterials.

关键词： Carbon-based nanomaterials Oxidative stress Trace element distribution TEM SR-μ-XRF

Identification of genetic locus with resistance to take-all in the wheat-Psathyrostachys huashanica Keng introgression line H148

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Journal of Integrative Agriculture 2021年第12期20卷 3101-3113页

作者： BAI Sheng-sheng ZHANG Han-bing HAN Jing wu jian-hui LI Jia-chuang GENG Xing-xia LU Bo-ya XIE Song-feng HAN De-jun ZHAO Ji-xin YANG Qun-hui wu Jun CHEN Xin-hong Shaanxi Key Laboratory of Plant Genetic Engineering Breeding/College of Agronomy Northwest A&F UniversityYangling 712100P.R.China State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy Northwest A&F UniversityYangling 712100P.R.China Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement/College of Agronomy Northwest A&F UniversityYangling 712100P.R.China

Take-all is a devastating soil-borne disease of wheat(Triticum aestivum L.).Cultivating resistant line is an important measure to control this *** huashanica Keng is a valuable germplasm resource with high resistance to *** study reported on a wheat-/R huashanica introgression line H148 with improved take-all resistance compared with its susceptible parent *** elucidate the genetic mechanism of resistance in H148,the F_(2)genetic segregating population of H148×XN585 was *** mixed genetic model analysis showed that the take-all resistance was controlled by two major genes with additive,dominant and epistasis *** segregant analysis combined with wheat axiom 660K genotyping array analysis showed the polymorphic SNPs with take-all resistance from *** alien introgression were mainly distributed on the chromosome *** of the F_(2)population using the KASP marker mapped a major QTL in an interval of 68.8-70.1 Mb on ***-two genes were found in the target interval of the Chinese Spring reference genome *** to the functional annotation of genes,two protein genes that can improve the systematic resistance of plant roots were predicted as candidate *** development of *** introgression line H148 and the resistant QTL mapping information are expected to provide some valuable references for the fine mapping of disease-resistance gene and development of take-all resistant varieties through molecular marker-assisted selection.

关键词： wheat Psathyrostachys huashanica Keng take-all genetic analysis quantitative trait loci

Effect of Mono-2-ethyhexyl Phthalate on DNA Methylation in Human Prostate Cancer LNCaP Cells

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Biomedical and Environmental Sciences 2017年第9期30卷 641-648页

作者： wu jian hui CHEN Jiao WANG Yong XIA Bin WANG Rong ZHAO Yan WANG Qin Xia SONG Qi YAO Shun Heng ZHANG Yun hui SUN Zu Yue National Evaluation Centre for the Toxicology of Fertility Regulating Drug Department of Pharmacology and ToxicologyShanghai Institute of Planned Parenthood ResearchShanghai 200032China Key Laboratory of Reproduction Regulation of NPFPC Shanghai 200032China Reproductive and Developmental Research Institute of Fudan University ShanghaiShanghai 200032China Division of Health Risk Factors Surveillance and Control Shanghai Municipal Center for Disease Control and PreventionShanghai 200336China Key Laboratory of Public Health Safety Ministry of EducationSchool of Public HealthFudan UniversityShanghai 200032China

Objective To evaluate whether mono（2‐ethylhexyl） phthalate（MEHP） affects genomic DNA methylation and the methylation status of some specific genes such as patched gene（PTCH） and smoothened gene（SMO） in LNCaP cells. Methods LNCaP cells were treated with MEHP（0, 1, 5, 10, and 25 μmol/L） for 3 days. An ELISA assay was preformed to detect genomic methylation, including 5‐methylcytosine（5‐mC） and 5‐hydroxymethylcytosine（5‐hmC） content. A pyrosequencing assay was applied to assess DNA methylation in PTCH and SMO gene promoters. The correlation between DNA methylation and gene expression was assessed. Results The proportion of cytosines with 5‐mC methylation in LNCaP cells was significantly decreased by MEHP（1, 5, 10, and 25 μmol/L） in a dose‐dependent manner（P 〈 0.01）. For genes in the Hedgehog pathway, there was no significant MEHP concentration‐dependent difference in the DNA methylation of PTCH and SMO. Conclusion MEHP might affect the progression of prostate cancer through its effect on global DNA methylation.

关键词： Mono(2‐ethyhexyl) phthalate LNCaP Genomic Methylation PTCH SMO

Experimental Study on Engineering Behavior of Solidified Soil for Scour Repair and Protection

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China Ocean Engineering 2024年第4期38卷 625-635页

作者： wu Xiao-ni LI Ru-yu SHU jian TANG Chao CHEN Jin-jian WANG hui-li jianG Hai-li WANG Xiao State Key Laboratory of Ocean Engineering Department of Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Road and Bridge Group Co. Ltd.Shanghai 200433China Shanghai Engineering Research Center of Urban Infrastructure Renewal Shanghai 200032China jiangsu Kunze Technology Co. Ltd.Nanjing 210000China

A new scour countermeasure using solidified slurry for offshore foundation has been proposed *** solidified slurry is pumped to seabed area around foundation for scour protection or pumped into the developed scour holes for scour repair as the fluidized material solidifies *** the pumping operation and solidification,the engineering behaviors of solidified slurry require to be considered synthetically for the reliable application in scour repair and protection of ocean engineering such as the pumpability related flow value,flow diffusion behavior related rheological property,anti-scour performance related retention rate in solidification and bearing capacity related strength property after *** this study,a series of laboratory tests are conducted to investigate the effects of mix proportion(initial water content and binder content)on the flow value,rheological properties,density,retention rate of solidified slurry and unconfined compressive strength(UCS).The results reveal that the flow value increases with the water content and decreases with the binder *** the solidified slurry exhibits Bingham plastic behavior when the shear rate is larger than 5 s^(-1).The Bingham model has been employed to fit the rheology test results,and empirical formulas for obtaining the density,yield stress and viscosity are established,providing scientific support for the numerical assessment of flow and diffusion of solidified *** rate of solidified slurry decreases with the water flow velocity and flow value,which means the pumpability of solidified slurry is contrary to anti-scour *** unconfined compressive strength after solidification reduces as the water content increases and binder content decreases.A design and application procedure of solidified soil for scour repair and protection is also proposed for engineering reference.

关键词： scour repair and protection solidified soil pumpability strength flow properties anti-scour performance

Unlocking the Potential of Poly(butylene succinate)through Incorporation of Vitrimeric Network Based on Dynamic Imine Bonds

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Chinese Journal of Polymer Science 2024年第10期42卷 1414-1424,I0006页

作者： Shan-Song wu hui-Juan Lu Yi-Dong Li Shui-Dong Zhang jian-Bing Zeng Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing400715China School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510640China

Poly(butylene succinate)(PBS)exhibits many advantages,such as renewability,biodegradability,and impressive thermal and mechanical properties,but is limited by the low melt viscosity and strength resulted from the linear *** address this,vitrimeric network was introduced to synthesize PBS vitrimers(PBSVs)based on dynamic imine bonds through melt polymerization of hydroxyl-terminated PBS with vanillin derived imine containing compound and hexamethylene diisocyanate using trimethylolpropane as a crosslinking *** with different crosslinking degrees were synthesized through changing the content of the crosslinking *** effect of crosslinking degree on the thermal,theological,mechanical properties,and stress relaxation behavior of the PBSVs was studied in *** results demonstrated that the melt viscosity,melt strength,and heat resistance were enhanced substantially without obvious depression in crystallizability,thermal stability,and mechanical properties through increasing crosslinking *** addition,the PBSVs exhibit thermal reprocessability with mechanical properties recovered by more than 90%even after processing for three ***,PBSV with improved melt properties shows significantly improved foamability compared to commercial *** research contributes to the advancement of polymer technology by successfully developing PBS vitrimers with improved properties,showcasing their potential applications in sustainable and biodegradable materials.

关键词： Poly(butylene succinate) Vitrimer Imine bonds Foamability

Understanding the Thermal Impedance of Silicone Rubber/Hexagonal Boron Nitride Composites as Thermal Interface Materials

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Chinese Journal of Polymer Science 2024年第3期42卷 352-363,I0008页

作者： Yuan Ji Shi-Da Han Hong wu Shao-Yun Guo Feng-Shun Zhang jian-hui Qiu The State Key Laboratory of Polymer Materials Engineering Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyPolymer Research InstituteSichuan UniversityChengdu 610065China Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621900China Department of Mechanical Engineering Faculty of Systems Science and TechnologyAkita Prefectural UniversityAkita 015-0055Japan

Silicone rubber(SR) composites are most widely used as thermal interface materials(TIMs) for electronics heat dissipation. Thermal impedance as the main bottleneck limiting the performance of TIMs is usually neglected. Herein, the thermal impedance of SR composites loaded with different levels of hexagonal boron nitride(h-BN) as TIMs was elaborated for the first time by the ASTM D 5470 standard test and finite element analysis. It was found that elastic modulus and surface roughness of SR composites increased with the increase of h-BN content, indicating that the conformity was reduced. When the assembly pressure was 0.69 MPa, there existed an optimal h-BN content at which the contact resistance was minimum(0.39 K·cm^(2)·W^(-1)). Although the decreased bond line thickness(BLT) by increasing the assembly pressure was beneficial to reduce the thermal impedance, the proper assembly pressure should be selected to prevent the warpage of the contact surfaces and the increase in contact resistance, according to the compression properties of the SR composites. This study provides valuable insights into fabrication of high-performance TIMs for modern electronic device applications.

关键词： Thermal interface materials Hexagonal boron nitride Thermal impedance Surfaces