检索结果-内蒙古大学图书馆

Investigation of the Induration Mechanism of Red Mud Pellets with Tartaric Acid Additions

MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW 2023年第8期44卷 554-564页

作者： qin, Yihe Yuan, Run Yue, Pu Li, Chunquan Zhang, Xuewei Li, Na Bai, Lu Wang, Zichen Xia, Yu He, xuwen China Univ Min & Technol Sch Chem & Environm Engn Beijing Peoples R China

Herein, tartaric acid (TA) was used as a binder to prepare red mud pellets. The effect of TA on the compressive strength and induration mechanism of the pellets containing TA was analyzed via the changes in crystal structure, functional groups, and valence states of the constituent elements. The induration mechanism of TAPE is likely the chemical reaction between TA and partial calcite along with complexation of TA with minerals containing Ca(II), Al(III), and Fe(III). The density functional theory calculation results revealed that the TA-Ca(II) complexation products in red mud were more stable than those of Al(III) and Fe(III).

关键词： Tartaric acid compression strength density functional theory calculation pellet

来源：评论

学校读者我要写书评

暂无评论

Multifunctional ORF3 protein of hepatitis E virus

引用

JOURNAL OF MEDICAL VIROLOGY 2024年第6期96卷 e29691-e29691页

作者： Li, Xiaoxuan Sun, xuwen Pinpin, Ji Zhao, qin Sun, Yani Northwest Agr & Forestry Univ Coll Vet Med Dept Prevent Vet Med Yangling Shaanxi Peoples R China

Hepatitis E virus (HEV) is an emerging zoonotic pathogen that is transmitted primarily through the fecal-oral route and can cause acute hepatitis in humans. Since HEV was identified as a zoonotic pathogen, different species of HEV strains have been globally identified from various hosts, leading to an expanding range of hosts. The HEV genome consists of a 5' noncoding region, three open reading frames (ORFs), and a 3' noncoding region. The ORF3 protein is the smallest but has many functions in HEV release and pathogenesis. In this review, we systematically summarize recent progress in understanding the functions of the HEV ORF3 protein in virion release, biogenesis of quasi-enveloped viruses, antigenicity, and host environmental regulation. This review will help us to understand HEV replication and pathogenesis mechanisms better.

关键词： hepatitis E innate immunity ORF3 protein quasi-enveloped virion

来源：评论

学校读者我要写书评

暂无评论

Effect of grinding depth on the rotating bending fatigue properties of 40Cr steel

引用

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 2022年第4期45卷 1292-1295页

作者： Zhou, Honggen Chen, Jianzhi Bai, Xiaoxiang Li, Guochao Guan, Xiaoyan Du, qin Li, Ning Jing, xuwen Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Jiangsu Peoples R China Beijing North Vehicle Grp Co Ltd Beijing Peoples R China

来源：评论

学校读者我要写书评

暂无评论

Characteristics and mechanism of adsorption of tartaric acid by carbide slag ascertained and applied to prepare a binder

引用

JOURNAL OF CLEANER PRODUCTION 2022年 337卷

作者： qin, Yihe Zhang, Kai He, xuwen China Univ Min & Technol Beijing Peoples R China

Pelletization is essential for the reutilization of mineral fines, and binder plays a crucial role in preparing pellets that satisfy strength requirements. In this study, carbide slag (CS) was modified with tartaric acid (TA) using a novel binder (TACS) to produce red mud pellets. In this study, to investigate the effect of TACS on the compressive strength of the pellets and ascertain the mechanism of adsorption of TA onto CS during pelletizing and adsorption experiments, the changes in crystal structure, functional groups, and valence states of elements in a solution of CS in TA were analyzed, and density functional theory calculations and molecular dynamics simulations were performed. The target pellet strength was achieved by using TACS to prepare cold-pressed red mud pellets at a solid-to-liquid ratio of 0.20. The pH of the TA solution used to prepare the binder was 13.00. The maximum adsorption capacity of CS for TA, calculated using the Langmuir model, was 336.33 mg.g(-1). The TACS was analyzed using X-ray powder diffraction, Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller method, and X-ray photoelectron spectroscopy. The analysis results confirmed that the TACS mainly comprised Ca(OH)(2) and that the adsorption of TA onto CS involved complexation and hydrogen bonding. The complexing reactions of the carboxyl and hydroxyl groups of TA with the Ca ion were dominant. This study provides experimental and theoretical guidance for future studies on the preparation of composite binders.

关键词： Tartaric acid Carbide slag Adsorption Binder Density functional theory calculation Molecular dynamics simulation

来源：评论

学校读者我要写书评

暂无评论

Threat Assessment Method for Cluster Targets Based on GWO-IFE

Threat Assessment Method for Cluster Targets Based on GWO-IF...

引用

Intelligent Computing and Robotics (ICICR), International Conference on

作者： xuwen Mao Junjie Wang Wenbin Zhang Jiawen Qian Haotian qin Northwest Insitute of Nuclear Technology Xi’an China

ISBN: (数字)9798350372274

ISBN: (纸本)9798350372281

Electromagnetic killing is characterized by high efficiency and low cost when dealing with the threat of low, slow and small cluster targets. Firstly, For the characteristics of electromagnetic energy to target can be calculated and the damage effect can be assessed, this paper proposed power to target, cost of attack and other indicators to calculate the target threat degree. Secondly, this paper proposed an assessment method based on GWO-IEF (Grey Wolf Optimizer-Intuitionistic Fuzzy Entropy) to solve the problem of low efficiency of threat degree calculation. Finally, Simulation proves that this method has high computational efficiency and solution accuracy, and compared with the traditional target threat assessment method based on dynFWA-IEF (Dynamic Search Fireworks Algorithm-Intuitionistic Fuzzy Entropy), the computational speed is improved by nearly 54.63%, and the generated results are consistent with the expected electromagnetic weapon attack capability.

关键词： Costs Accuracy Weapons Heuristic algorithms Clustering algorithms Threat assessment Entropy

来源：评论

学校读者我要写书评

暂无评论

三维物探船6缆扩充到8缆物探作业系统的升级改造

引用

船舶工程 2019年第10期41卷 6-10,115页

作者：秦绪文张海瑛徐阳光李方杰孔小兵广州海洋地质调查局广州510075 中国船舶及海洋工程设计研究院上海200011

三维物探船拖带数字地震电缆能力是衡量物探船作业效率的重要依据。在设计初期,可扩充为三维6缆的物探船。随着设计的深入,对于船舶的空间及动力系统、稳性、船体结构强度等进行合理评估,同时对艉部物探作业系统进行了进一步优化,最终... 详细信息

三维物探船拖带数字地震电缆能力是衡量物探船作业效率的重要依据。在设计初期,可扩充为三维6缆的物探船。随着设计的深入,对于船舶的空间及动力系统、稳性、船体结构强度等进行合理评估,同时对艉部物探作业系统进行了进一步优化,最终升级为国内第一艘三维8缆作业物探船。艉部物探作业系统合理空间位置的预留,为升级改造提供了可行的方案。经过此次升级改造,提高了船舶的物探作业效率,使物探作业性能指标达到国际先进水平。

关键词：三维物探船 6缆 8缆物探作业系统

来源：评论

学校读者我要写书评

暂无评论

南海天然气水合物钻采机理与调控研究进展

引用

中国科学基金 2021年第6期35卷 940-951页

作者：孙金声程远方秦绪文孙友宏金衍王志远李淑霞陆程屈沅治吕开河王成文王金堂王韧中国石油大学(华东) 青岛266580 中国石油集团工程技术研究院有限公司北京102206 中国地质调查局北京100037 广州海洋地质调查局广州510075 中国地质大学(北京) 北京100083 中国石油大学(北京) 北京102249 中国地质调查局油气资源调查中心北京100083

海域天然气水合物试采存在井壁易失稳、井漏、流动安全风险高、储层改造困难、单井日产气量低、稳产时间短等一系列技术难题,水平井、多分支井等有望提高产气量的复杂结构井钻采难度更大。本文基于对国内外水合物钻采研究进展以及已开... 详细信息

海域天然气水合物试采存在井壁易失稳、井漏、流动安全风险高、储层改造困难、单井日产气量低、稳产时间短等一系列技术难题,水平井、多分支井等有望提高产气量的复杂结构井钻采难度更大。本文基于对国内外水合物钻采研究进展以及已开展天然气水合物勘探、试采工程现状的跟踪调研,总结分析了海域天然气水合物试采面临的关键技术难题,进而根据我国南海天然气水合物试采工程特性,对天然气水合物储层力学特性动态演化规律及工程响应机制、井筒工作液与天然气水合物储层作用机理和调控方法、天然气水合物钻采井筒多相流动障碍形成机制与安全控制方法、储层天然气水合物相变和渗流多场时空演化规律、天然气水合物储层结构改造理论与高效开发模式等方面研究进展进行了论述,以期为我国海域天然气水合物钻采理论及技术的发展提供借鉴。

关键词：南海天然气水合物钻采工程力学特性井筒工作液相变及渗流特征

来源：评论

学校读者我要写书评

暂无评论

Altered levels of circulating CD8⁺CXCR5⁺PD-1⁺T follicular cytotoxic cells in primary Sjogren's syndrome

引用

CLINICAL RHEUMATOLOGY 2022年第6期41卷 1697-1708页

作者： Zhai, xuwen Wang, Yanlin Guo, Hui Liang, Zhaojun Feng, Min Wu, Yanyao qin, Yan Zhao, Xiangcong Gao, Chong Luo, Jing Shanxi Med Univ Simulat Hosp Clin Skills Teaching Jinzhong 030600 Shanxi Peoples R China Shanxi Med Univ Dept Med Div Rheumatol Hosp 2 Taiyuan 030001 Shanxi Peoples R China Shanxi Med Univ Dept Med Div Nephrol Hosp 2 Taiyuan 030001 Shanxi Peoples R China Shenzhen Baoan Shiyan Peoples Hosp Dept Med Div Nephrol Shenzhen 518005 Guangdong Peoples R China Harvard Med Sch Brigham & Womens Hosp Dept Pathol Boston MA 02115 USA

Background Circulating CD8(+)T-cells expressing the C-X-C chemokine receptor type 5 (CXCR5) (CD8(+)CXCR5(+)T), a recently identified follicular cytotoxic T cell subset, are involved in antiviral immunity and autoimmunity, but their abundance and role in the pathogenesis of primary Sjogren syndrome (pSS) are unknown. Methods Circulating CD8(+)CXCR5(+)T cell and CD8(+) regulatory T cells (CD8(+)Treg) were evaluated in 49 pSS patients (19 patients with pulmonary involvement) and 24 age- and sex-matched healthy controls (HCs) by flow cytometry. Orthogonal partial least squares discriminant analysis (OPLS-DA) was performed, and receiver operating characteristic curves (ROC) were generated to identify characteristic cell subsets. Spearman's correlation analysis was conducted to examine the relationships between CD8(+)T cell subsets and clinical features. Results The proportions and numbers of CD8(+)CXCR5(+) , CD8(+)CXCR5(+) programmed death 1-positive (PD-1(+)), and CD8(+)CXCR5 PD-1(+)T cells were significantly higher, whereas those of CD8 +/- Treg were markedly lower, in pSS patients than HCs. The CD8(+)CXCR5(+)PD-1(+)T cell to CD8(+)Treg ratio had the greatest discriminatory power for pSS and HCs according to OPLS-DA and ROC analyses. The increased numbers of CD8(+)CXCR5(+)T cells and CD8(+)CXCR5(+)PD-1(+)T cells were strongly associated with those of CD4(+)CXCR5(+)T and B cells. The proportions and numbers of CD8(+)CXCR5(+)PD-1(+)T cells were increased in pSS patients with lung involvement. Conclusions We identified a new CD8(+)CXCR5(+)PD-1(+)T subset, which was increased in abundance in pSS patients, particularly those with lung involvement, compared with HCs. Also, the CD8(+)CXCR5(+)PD-1(+)T to CD8(+)Treg ratio may be useful for identifying pSS. Our findings suggest that targeting follicular CD8(+)T cell subsets has therapeutic potential for pSS.

关键词： CD8(+)CXCR5(+) follicular cytotoxic T subsets CD8(+) regulatory T cells Lung involvement OPLS-DA Primary Sjogren's syndrome

来源：评论

学校读者我要写书评

暂无评论

Efficient removal and recovery of phosphorus from industrial wastewater in the form of vivianite

引用

ENVIRONMENTAL RESEARCH 2023年第1期228卷 115848页

作者： Zhang, Yangzhong qin, Jiafu Chen, Zhenguo Chen, Yongxing Zheng, xuwen Guo, Lu Wang, Xiaojun South China Univ Technol Sch Environm & Energy Guangzhou 510006 Peoples R China South China Normal Univ Sch Environm Guangzhou 510006 Peoples R China Hua An Biotech Co Ltd Foshan 528300 Peoples R China

With the shortage of phosphorus resources, the concept of phosphorus recovery from wastewater is generally proposed. Recently, phosphorus recovery from wastewater in the form of vivianite has been widely reported, which could be used as a slow-release fertilizer as well as the production of lithium iron phosphate for Li-ion batteries. In this study, chemical precipitation thermodynamic modeling was applied to evaluate the effect of solution factors on vivianite crystallization with actual phosphorus containing industrial wastewater. The modeling results showed that the solution pH influences the concentration of diverse ions, and the initial Fe2+ concentration affects the formation area of vivianite. The saturation index (SI) of vivianite increased with the initial Fe2+ concentration and Fe:P molar ratio. pH 7.0, initial Fe2+ concentration 500 mg/L and Fe:P molar ratio 1.50 were the optimal conditions for phosphorus recovery. Mineral Liberation Analyzer (MLA) accurately determined the purity of vivianite was 24.13%, indicating the feasibility of recovering vivianite from industrial wastewater. In addition, the cost analysis showed that the cost of recovering phosphorus by the vivianite process was 0.925 USD/kg P, which can produce high-value vivianite products and realize "turn waste into treasure".

关键词： Phosphorus recovery Vivianite Crystallization zone Resource recycling

来源：评论

学校读者我要写书评

暂无评论

Co-sorption of phthalate esters and Cd2+ on biochar-sulfhydryl modified montmorillonite composites

引用

Journal of Hazardous Materials 2025年 494卷 138526页

作者： Li, Wenjie Mao, Pengfei Chen, xuwen Ling, Wanting qin, Chao Gao, Yanzheng Institute of Organic Contaminant Control and Soil Remediation College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing210095 China

Developing efficient passivating sorption materials for the treatment of combined pollution by phthalate esters (PAEs) and Cd2+ has become a critical focus in environmental protection and soil remediation. In this study, biochar-sulfhydryl modified montmorillonite composites (BC-SHMMT) were synthesized, characterized, and evaluated for the co-sorption of PAEs (DMP, DEP) and Cd2+. The integration of sulfhydryl-modified montmorillonite (MMT-SH) with biochar improved the material's surface structure, enhancing both co-sorption capacity and structural stability. Molecular dynamics simulation indicated a monolayer chemical sorption of pollutants by BC-SHMMT, in alignment with the sorption theoretical model. In the co-sorption system, the coexistence of pollutants increased the adsorption of Cd2+ and decreased the sorption of PAEs. The smaller molecular size and higher diffusion coefficient of Cd2+ facilitated its pore filling and interaction with oxygen-containing functional groups of the material, leading to competition with PAEs for sorption sites. Notably, the ion exchange and complexation of Cd2+ adsorption by MMT-SH are pivotal in enhancing BC-SHMMT co-sorption capacity. These findings provide valuable insights into the development of eco-friendly novel materials and the improvement of co-pollution remediation efficiency. © 2025 Elsevier B.V.

关键词： Absorbance

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：