检索结果-南通市图书馆

Priming strategies for controlling stem cell fate: Applications and challenges in dental tissue regeneration

World Journal of Stem Cells 2021年第11期13卷 1625-1646页

作者： si-Yuan Zhang jia-Yin Ren Bo yang State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Oral Radiology West China Hospital of StomatologySichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Oral and Maxillofacial Surgery West China Hospital of StomatologySichuan UniversityChengdu 610041Sichuan ProvinceChina

Mesenchymal stromal cells(MSCs)have attracted intense interest in the field of dental tissue *** tissue is a popular source of MSCs because MSCs can be obtained with minimally invasive *** possess distinct inherent properties of self-renewal,immunomodulation,proangiogenic potential,and multilineage potency,as well as being readily available and easy to ***,major issues,including poor engraftment and low survival rates in vivo,remain to be resolved before large-scale application is feasible in clinical ***,some recent investigations have sought ways to optimize MSC functions in vitro and in ***,priming culture conditions,pretreatment with mechanical and physical stimuli,preconditioning with cytokines and growth factors,and genetic modification of MSCs are considered to be the main strategies;all of which could contribute to improving MSC efficacy in dental regenerative *** in this field has made tremendous progress and continues to gather interest and stimulate *** this review,we summarize the priming approaches for enhancing the intrinsic biological properties of MSCs such as migration,antiapoptotic effect,proangiogenic potential,and regenerative *** in current approaches associated with MSC modification and possible future solutions are also *** aim to outline the present understanding of priming approaches to improve the therapeutic effects of MSCs on dental tissue regeneration.

关键词： Mesenchymal stem cells Priming Dental regeneration Culture conditions Cytokines Growth factors Genetic modification

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

Viscosity and structure relationship with equimolar substitution of CaO with MgO in the CaO–MgO–Al_(2)O_(3)–siO_(2)slag melts

引用

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang Jie Dang jia Guo Hanghang Zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for CaO on the viscosity and structure of a high-alumina CaO-MgO-Al_(2)O_(3)-siO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[siO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[siO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[siO_(4)]and[AlO_(4)]tetrahedral structures by CaO and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

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

Microwave-Controlled Light-Pulse Propagation in a Driven A-Type Atomic System with Two-Folded Levels

引用

Communications in Theoretical Physics 2009年第7期52卷 137-142页

作者： YU Rong LI jia-Hua si Liu-Gang yang Xiao-Xue School of Science Wuhan Institute of Technology Wuhan 430205 China Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology Wuhan 430074 China

The temporal and spatial dynamics of one weak probe laser pulse, propagating through a A-type atomic medium with two-folded levels under the resonant excitation of one microwave driving field and one strong control field, is investigated in this paper. By numerically solving coupled Bloch-Maxwell equations, it is found that, in the absence of the microwave driving field, the atomic medium is transparent to the probe pulse at line center, which propagates over sufficiently long distances. By contrast, when the microwave driving field is applied, the probe pulse at line center can be rapidly absorbed on propagation. This substantial reduction of probe transmittance caused by the microwave driving field may lead to potential applications in designing a new kind of optical switching.

关键词： probe absorption and transmittance double-dark resonances (DDRs) switching

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

Rogue wave solutions and rogue-breather solutions to the focusing nonlinear Schr?dinger equation

引用

Communications in Theoretical Physics 2024年第3期76卷 33-41页

作者： si-jia Chen Xing Lü College of Science Tianjin University of TechnologyTianjin 300384People's Republic of China Department of Mathematics Beijing Jiaotong UniversityBeijing 100044People's Republic of China Beijing Laboratory of National Economic Security Early-warning Engineering Beijing Jiaotong UniversityBeijing 100044People's Republic of China

Based on the long wave limit method,the general form of the second-order and third-order rogue wave solutions to the focusing nonlinear Schr?dinger equation are given by introducing some arbitrary *** interaction solutions between the first-order rogue wave and one-breather wave are constructed by taking a long wave limit on the two-breather *** applying the same method to the three-breather solutions,two types of interaction solutions are obtained,namely the first-order rogue wave and two breather waves,the second-order rogue wave and one-breather wave,*** influence of the parameters related to the phase on the interaction phenomena is graphically *** occur among the rogue waves and breather *** the collisions,the shape of them remains *** abundant interaction phenomena in this paper will contribute to a better understanding of the propagation and control of nonlinear waves.

关键词： nonlinear Schrodinger equation rogue wave solutions interaction solutions

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

Road map for, and technical challenges of, carbon-nanotube integrated circuit technology

引用

National Science Review 2024年第3期11卷 14-16页

作者： jia si Panpan Zhang Zhiyong Zhang Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics School of Electronics Peking University State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

The past decade has witnessed an explosion of research on carbon-nanotube(CNT) electronics due to their outstanding properties, including an ultrathin body, a high carrier mobility and a high saturation velocity.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Facile synthesis of W-Mo bimetallic oxides with high adsorption properties from secondary resources

引用

Tungsten 2024年第4期6卷 806-820页

作者： jia-Li Cheng yang-si Liu Xiao-Li Xi Zuo-Ren Nie Collaborative Innovation Center of Capital Resource-Recycling Material Technology College of Materials Science and EngineeringBeijing University of TechnologyBeijing100124China National Engineering Laboratory for Industrial Big-Data Application Technology Beijing University of TechnologyBeijing100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing100124China

A simple solvothermal method was used to obtain W-Mo bimetallic oxides from W-Mo alloy scrap,and pure metal powders were also used as the raw materials to simulate *** products had a sea urchin-like structure with abundant oxygen vacancies and the products prepared at low temperatures forms a sosoloid resembling orthorhombic W_(0.4)Mo_(0.6)O_(3).The WMo bimetallic oxide prepared at the reaction temperature of 120℃exhibited excellent selective adsorption performance for methylene blue(MB),which the adsorption rate of MB reached 99%in 12 min and the adsorption rate reached 90%after6 adsorption *** the W-Mo molar ratio is 1:3,the maximum adsorption capacity of sample for MB can reach1148 mg·g^(-1).The adsorption process followed the Langmuir and pseudo-second-order models,which is surface-controlled monolayer *** experimental results show the feasibility of preparing W-Mo bimetal oxide products from pure materials and *** process is simple and effective,which offered a potential approach for secondary resource recycling and reusing.

关键词： W-Mo bimetallic oxide Oxygen vacancy Selective adsorption W-Mo alloy scrap Solvothermal

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

Estrogen receptor beta treats Alzheimer's disease

引用

Neural Regeneration Research 2013年第5期8卷 420-426页

作者： Zhu Tian jia Fan yang Zhao Sheng Bi Lihui si Qun Liu Department of Neurology the First Hospital of Jilin University Department of Neurology the Second Hospital of Jilin University Department of Obstetrics and Gynecology the Second Hospital of Jilin University

In vitro studies have shown that estrogen receptor β can attenuate the cytotoxic effect of amyloid protein on PC12 cells through the Akt pathway without estrogen stimulation. In this study, we aimed to observe the effect of estrogen receptor β in Alzheimer＇s disease rat models established by intraventricular injection of amyloid β protein. Estrogen receptor β lentiviral particles delivered via intraventricular injection increased Akt content in the hippocampus, decreased interleukin-1β mRNA tumor necrosis factor a mRNA and amyloid β protein levels in the hippocampus, and improved the learning and memory capacities in AIzheimer＇s disease rats. Estrogen receptor β short hairpin RNA lentiviral particles delivered via intraventricular injection had none of the above impacts on AIzheimer＇s disease rats. These experimental findings indicate that estrogen receptor β, independent from estrogen, can reduce inflammatory reactions and amyloid β deposition in the hJppocampus of AIzheimer＇s disease rats, and improve learning and memory capacities. This effect may be mediated through activation of the Akt pathway.

关键词： neural regeneration neurodegenerative diseases estrogen estrogen receptor β Alzheimer's disease amyloid β protein inflammatory cytokines Akt signaling pathway cognition neural protection photographs-containing paper neuroregeneration

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

Neutronics physics analysis of a large fluoride-salt-cooled solidfuel fast reactor with Th-based fuel

引用

Nuclear Science and Techniques 2017年第11期28卷 188-197页

作者： Yu Peng Gui-Feng Zhu yang Zou si-jia Liu Hong-Jie Xu Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049China

Fast reactors based on thorium fuel have enhanced inherent safety. Fluoride salt performs well as a coolant in high-temperature nuclear systems. In this paper,we present a reference core for a large fluoride-salt-cooled solid-fuel fast reactor(LSFR) using thorium–uranium fuel cycle. Neutronics physics of the LSFR reference core is investigated with 2D and 3D in-core fuel management strategy. The design parameters analyzed include the fuel volume fraction, power density level and continuous removal of fission products with 3D fuel shuffling that obtains better equilibrium core performance than 2D shuffling. A self-sustained core is achieved for all cases,and the core of 60% fuel volume fraction at 50 MW/m^3 power density is of the best breeding performance(average breeding ratio 1.134). The LSFR core based on thorium fuel is advantageous in its high discharge burn-up of 20–30% fissions per initial heavy metal atom, small reactivity swing over the whole lifetime(to simplify the reactivity control system), the negative reactivity temperature coefficient(intrinsically safe for all cases) and accepted cladding peak radiation damage. The LSFR reactor is a good alternative option for the deployment of a self-sustained thorium-based nuclear system.

关键词： Fluoride salts Thorium cycle Fast reactor Core characteristics Equilibrium

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

Modification of CeO_2-ZrO_2 catalyst by potassium for NOx-assisted soot oxidation

引用

Journal of Environmental Sciences 2011年第1期23卷 145-150页

作者： DuanWeng jia Li, Xiaodong Wu Zhichun si State Key Laboratory of New Ceramics & Fine Process Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

Potassium-modified ceria-zirconia catalyst was synthesized by wetness impregnation method. The ageing treatment was performed in static air at 800℃ for 20 hr to evaluate the thermal stability of the catalyst. The catalysts were characterized by X-ray diffraction, BET surface area, oxygen storage capacity, NOx-temperature programmed desorption and soot-temperature programmed oxidation measurements. By introduction of potassium, the maximum soot oxidation rate temperature （Tin） of the ceria-zirconia based catalyst decreased from 525 to 428℃ in the presence of NO under a loose contact mode. The shift of Tm of the K-modified catalyst after ageing is only 15℃. The enhanced activity of the aged catalyst mainly lies in the promotional effect of potassium on the NOx/oxygen storage capacity as well as the soot-catalyst contact.

关键词： CeO2-ZrO2 mixed oxides potassium soot combustion NOx storage oxygen storage capacity

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

Rejuvenating soybean(Glycine max L.)growth and development through slight shading stress

引用

Journal of Integrative Agriculture 2020年第10期19卷 2439-2450页

作者： WEN Bing-xiao Sajad HUSSAIN yang jia-yue WANG Shan ZHANG Yi QIN si-si XU Mei yang Wen-yu LIU Wei-guo Institute of Ecological Agriculture Sichuan Agricultural University/Sichuan Engineering Research Centre for Crop Strip Intercropping SystemChengdu 611130P.R.China

The impact of increased shading stress on agronomic traits,photosynthetic performance and antioxidants activities in leaves of two soybeans cultivars(D16 and E93)was *** seedlings were grown in pots and exposed to no shade(S0),slight shade(S1),moderate shade(S2),and heavy shade(S3).Our findings showed that under the S3 in both cultivars,leaf fresh weight(LFW),specific leaf area(SLA)and leaf thickness decreased signifiantly,accompanied by a reduction in photochemical parameters including the maximum quantum yield(Fv/Fm)and electron transport rate(ETR).Furthermore,compared to SO,S1 significantly increased the ETR,sucrose content and the activity of catalase(CAT)in both D16 and E93 cultivars while S2 and S3 decreased the ***,under all treatments of shading stress,the antioxidant activities of superoxide dismutase(SOD)and peroxidase(POD)were lowered in both *** morphological and physiological plasticity to adapt S1 compensates for the decrease in biomass and leads to seed weight compared to that obtained with an amount of normal *** configuring the space in the intercropping systems,S1 could be helpful for optimum growth and *** photosynthesis through S1 for the intercropping systems could be a smart approach.

关键词： plant morphology photosynthesis antioxidant systems slight shade

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

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

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

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：