检索结果-南通市图书馆

Optimization of mineralization Curing System for Efficient and Safe Utilization of Steel Slag Wastes

Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 595-602页

作者：伊海赫 ZHAN Qiwei YU Xiaoniu School of Civil and Architectural Engineering Shandong University of TechnologyZibo 255000China School of Civil Engineering and Architecture Jiangsu University of Science and TechnologyZhenjiang 212003China Department of Civil and Environmental Engineering Nanyang Technological UniversitySingapore City 639798Singapore

The crystal structure and morphology of the mineralization products were studied by scanning electron microscopy(SEM)and X-ray diffraction(XRD),and the thermal properties were studied by thermogravimetric-differential scanning calorimetry(DSC)analysis.The changes of microorganism quantity and enzyme activity in pore solution with time were measured.The experimental results show that microorganism quantity and enzyme activity in pore solution reach the maximum at 50-60 h,mineralization curing begins at this time,the strength of microbial mineralized steel slag reaches the maximum.This study provides a good selection basis for selecting the optimum mineralization system for the production of microbial mineralized steel slag products.Bacterial mineralization can accelerate the rate of carbon sequestration in the mineralization process.The compressive strength of steel slag with 1.5% bacterial can reach up to 55.6 MPa.The microstructure and thermal properties of calcium carbonate precipitate induced by the enzymes of bacillus subtilis differs from the chemical precipitation in pore solution of steel slag.Through the analysis of the mineralized products of steel slag,the reaction rate of free calcium oxide and free magnesium oxide in steel slag after the addition of microorganisms is significantly increased,which improves the stability of steel slag as cementitious material.Meanwhile,the production of calcium carbonate,the main mineralized product,is significantly increased.

关键词： steel slag microorganism bio-mineralization enzyme activity curing system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reconstruction of Surface Porous PEEK Decorated with Strontium-doped Calcium Phosphate Coatings for Enhancing Osteogenic Activity

引用

Journal of bionic Engineering 2021年第4期18卷 927-943页

作者： Chengcheng Liang Xiong Xiong Rongwei Cui Yuanxiao Hong Xin Liu Guoru Zhao Lizi Ye Shuxin Qu Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Life Science and Engineering Southwest Jiaotong UniversityChengdu 610031China Department of Pediatric Surgery the Affiliated Hospital of Southwest Medical UniversityLuzhou 646000China

The aim of this study was to reconstruct surface porous structure with hundreds of micrometers and then bio-mineralize Sr-doped Calcium Phosphate(Sr-doped CaP)on Polyetheretherketone(PEEK)profile to enhance its bioactivity.A surface porous structure was prepared on PEEK profile by embedding and acid-etching of SiO2 particles as porogen(SP-PEEK).Then the Sr-doped CaP was further decorated on the porous surface after sulfonation,introduction of Sr-doped CaP crystal seeds and bio-mineralization in 1.5 times simulated body fluid(BSSP-PEEK-CaP/Sr).It was feasible to reconstruct the surface porous structure with hundreds of micrometers on PEEK profile by the present method without damaging its mechanical properties.The Sr-doped CaP crystal seeds effectively promoted the bio-mineralization of bio-inertness PEEK.All as-prepared PEEK did not inhibit the proliferation of cells.ALP of bio-mineralized groups was significantly increased than that of the other groups.The BSSP-PEEK-CaP/Sr obviously affected the morphology and promoted the adhesion and spreading of cells.As a result,the cyto-biocompatibity and bioactivity of PEEK were improved after bio-mineralization.Sr-doped CaP on PEEK most likely was beneficial for cells,which was associated with the increasing of the hydrophilicity on PEEK.This study provided a candidate method to improve the osteogenesis of PEEK implants.

关键词： PEEK surface porous structure bio-mineralization bioactivity Sr-doped Calcium phosphate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Traditional mortar represented by sticky rice lime mortar——One of the great inventions in ancient China

引用

Science China(Technological Sciences) 2009年第6期52卷 1641-1647页

作者： YANG FuWei ZHANG BingJian PAN ChangChu ZENG YuYao Laboratory of Cultural Relics Conservation Materials Department of ChemistryZhejiang UniversityHangzhou 310027China

The development of traditional lime-based bond in ancient times was reviewed in this paper.It was proved by a lot of historical data that the application of organic materials in inorganic mortar was a sharp-cut characteristic during the developing process of construction gelled materials in ancient China.The important role sticky rice mortar ever played and the historical significance were revealed.Due to the excellent performance,such as high adhesive strength,good toughness,water-proof and so on,traditional mortar represented by sticky rice mortar should be one of the greatest technological contributions of the day in the world.Modern technology was employed in the study of the sticky rice lime mortar and the researching results of our laboratory and some researchers,including the compo-sition and the mechanism of solidification,were also presented.It was found that the sticky rice acted as a matrix of bio-mineralization which affected the microstructure of the calcium carbonate crystal and there was cooperation between sticky rice and calcite produced during the solidifying of the sticky rice mortar,which maybe lead to the excellent performance of the mortar.Because of excellent performance and importance in science,sticky rice mortar can be regarded as one of the greatest inventions in construction history of China.Relative research of sticky mortar will be of importance for the exploring of ancient momentous invention and the repairing of ancient construction.

关键词： invention sticky rice lime mortar lime bio-mineralization mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Adaptation of a biomineralization Strategy for Remineralization of Enamel and Dentin

引用

Journal of Wuhan University of Technology(Materials Science) 2005年第B12期20卷 60-62页

作者：梁志宏陈治清 Department of Dental Materials West China College of Stomatology Sichuan UniversityChengdu 610041 China

The bio- inspired strategy of triggered release of Ca^2＋ , Pi, F from prosomal compartments was used to induce rapid formation of FHA for potential dental use ： Calcium and inorganic phosphate salts were separately loaded into temperature-sensitive liposome composed of 90% DPPC and 10% DMPC. When heated from the room temperature to 35- 37 ℃ , the entrapped calcium, inorganic phosphate and fl^rin released from the liposome,A mixture of Ca- Pi and F-loaded liposome formed apatite. The mineral was indicated by a rapid drop in suspension PH from 7.4 approximately 6. This was illustrated by applying a liposome suspension warmed human dentin and enamel surface which resulted in deposition of apatite onto the tissue substrates.

关键词： biomimetic bio-mineralization liposome matrix vesicle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mobilization of Arsenic in Groundwater in the Southern Hanoi City (Vietnam) as Studied by Isotopic and Related Techniques

引用

Journal of Environmental Protection 2013年第7期4卷 68-74页

作者： Dang Duc Nhan Doan Van Canh Pham Quy Nhan Nguyen Thi Thanh Thuy Dinh Thi Bich Lieu Vo Thi Anh Dang Anh Minh Center for Water Resources Management Hanoi Vietnam Hanoi University of Mining and Geology Hanoi Vietnam Institute for Nuclear Science and Technology Hanoi Vietnam Vietnam Association of Hydrogeology Hanoi Vietnam Vietnam Atomic Energy Institute Hanoi Vietnam

Sixteen samples of surface and groundwater from the most southern part of the Hanoi city (Vietnam) has been taken and analyzed for the soluble major ions, namely Na+, K+, , Ca2+, Mg2+, Cl-, , and arsenic as well as molybdenum content along with isotopic composition of deuterium and oxygen (δ2H and δ18O), tritium activity, and δ13C in DIC. The stable isotopic composition of groundwater indicates the water in that area is recharged from the local meteoric and theRed River’s water sources. The mean residence time of the groundwater should be before 60-ies of the past century as its 3H activity ranged from LOD of the analytical technique (0.4 TU) to 2.1 TU only implying that As would not be related to its recent application. The concentrations of As in the water samples is weakly correlated with those of Fe2+ (R2 = 0.08) but it strongly did with the concentrations of bicarbonate (R2 = 0.80). Thus, bicarbonate seems to liberate As adsorbed on hydrous ferric oxides (Hfo) into water through the displacement mechanism. The surface adsorption-desorption of As could be proven by a strong correlation between As and Mo concentrations (R2 = 0.77). The bicarbonate formation in groundwater was thought to be, partly, due to the bio-mineralization of natural organic matter (NOM) by bacteria followed by the dissolution of calcite and/or dolomite present in the sediments. Evidence for the NOM bio-mineralization was found in the close relationship between δ13C and the concentration of bicarbonate in water. Therefore, the mobilization of As in groundwater of bicarbonate type in the southern part of Hanoi city seems to be not only due to the reductive dissolution of the Hfo but the bicarbonate displacement also should be considered.

关键词： Arsenic Mobilization Isotopic Technique Groundwater Nom bio-mineralization As-Bicarbonate Displacement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational Modeling of Sand Cementation by bio-mineral CaCO3

Computational Modeling of Sand Cementation by Bio-mineral Ca...

引用

中国材料大会2012

作者： Li Li Chunxiang Qian Yonghao Zhao Yuntian Zhu Nano-structural Materials Center Nanjing University of Science and Technology Schoolt of Materials Science and Engineering Southeast University Department of Materials Science and Engineering North Carolina State University

ISBN: (纸本)9783037856093

An innovative sand cementation method of bio-mineral carbonate formation in sand spacing through urea hydrolysis inspired by microbial urease was introduced in the present investigation. A sand column prepared for experimental data and a set of engineering equations for 1-D numerical modeling data of the sand cementation process were adopted. Important characteristic of CaCO3 weight vertically along the sand column and the urea concentration variation under the effect of microbial urease was investigated based on the experiment and the modeling. Future study was suggested to focus on the model’s parameters modification in order to construct an applicable model for industrial up-scaling application in sand or soil strengthening.

关键词： Computational modeling bio-mineralization CaCO3 precipitation Sand cementation Geodynamics

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：